AU620115B2 - Creation of Inventions and Patents with Artificial Intelligence

AU620115B2 – Treated inorganic filler
– Google Patents

AU620115B2 – Treated inorganic filler
– Google Patents
Treated inorganic filler

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Publication number
AU620115B2

AU620115B2
AU37917/89A
AU3791789A
AU620115B2
AU 620115 B2
AU620115 B2
AU 620115B2
AU 37917/89 A
AU37917/89 A
AU 37917/89A
AU 3791789 A
AU3791789 A
AU 3791789A
AU 620115 B2
AU620115 B2
AU 620115B2
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AU
Australia
Prior art keywords
weight
inorganic material
carbon black
aqueous suspension
latex
Prior art date
1988-07-13
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Ceased

Application number
AU37917/89A
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AU3791789A
(en

Inventor
David George Jeffs
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Imerys Minerals Ltd

Original Assignee
ECC International Ltd
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1988-07-13
Filing date
1989-07-06
Publication date
1992-02-13

1988-07-13
Priority claimed from GB888816622A
external-priority
patent/GB8816622D0/en

1989-07-06
Application filed by ECC International Ltd
filed
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ECC International Ltd

1990-01-18
Publication of AU3791789A
publication
Critical
patent/AU3791789A/en

1992-02-13
Application granted
granted
Critical

1992-02-13
Publication of AU620115B2
publication
Critical
patent/AU620115B2/en

2009-07-06
Anticipated expiration
legal-status
Critical

Status
Ceased
legal-status
Critical
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Classifications

C—CHEMISTRY; METALLURGY

C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR

C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS

C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties

C09C3/10—Treatment with macromolecular organic compounds

C—CHEMISTRY; METALLURGY

C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR

C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties

C09C3/006—Combinations of treatments provided for in groups C09C3/04 – C09C3/12

C—CHEMISTRY; METALLURGY

C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON

C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients

C08K9/00—Use of pretreated ingredients

C08K9/08—Ingredients agglomerated by treatment with a binding agent

C—CHEMISTRY; METALLURGY

C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR

C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black

C09C1/0081—Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound

C—CHEMISTRY; METALLURGY

C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR

C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties

C09C3/06—Treatment with inorganic compounds

C—CHEMISTRY; METALLURGY

C01—INORGANIC CHEMISTRY

C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2004/00—Particle morphology

C01P2004/30—Particle morphology extending in three dimensions

C01P2004/32—Spheres

C—CHEMISTRY; METALLURGY

C01—INORGANIC CHEMISTRY

C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2004/00—Particle morphology

C01P2004/30—Particle morphology extending in three dimensions

C01P2004/32—Spheres

C01P2004/34—Spheres hollow

C—CHEMISTRY; METALLURGY

C01—INORGANIC CHEMISTRY

C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2004/00—Particle morphology

C01P2004/60—Particles characterised by their size

C—CHEMISTRY; METALLURGY

C01—INORGANIC CHEMISTRY

C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2004/00—Particle morphology

C01P2004/60—Particles characterised by their size

C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer

C—CHEMISTRY; METALLURGY

C01—INORGANIC CHEMISTRY

C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2004/00—Particle morphology

C01P2004/80—Particles consisting of a mixture of two or more inorganic phases

C—CHEMISTRY; METALLURGY

C01—INORGANIC CHEMISTRY

C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2006/00—Physical properties of inorganic compounds

C01P2006/20—Powder free flowing behaviour

C—CHEMISTRY; METALLURGY

C01—INORGANIC CHEMISTRY

C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2006/00—Physical properties of inorganic compounds

C01P2006/60—Optical properties, e.g. expressed in CIELAB-values

Abstract

There is disclosed a process for preparing an inorganic filler which comprises admixing a particulate inorganic material with a natural or synthetic latex composition and an aqueous suspension of fine carbon black, and dewatering and drying the resultant mixture, the amount of the natural or synthetic latex composition added being such as to provide a coating on the inorganic mineral of from 1% to 10% by weight of latex solids based on the weight of dry inorganic material.

Description

_I
620115 COMPLETE SPECIFICATION FOR OFFICE USE Application Number: Lodged: Complete Specification Lodged: Accepted: Published: Priority: Class Int. Class
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54a,
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Related Art: TO BE COMPLETED BY APPLICANT
I
Name of Applicant: Address of Applicant: Actual Inventor: Address for Service: ECC INTERNATIONAL.LIMITED John Keay House, St. Austell, Cornwall, PL25 4DJ, England.
David George JEFFS SMITH SHELSTON BEADLE 207 Riversdale Road Box 410) Hawthorn, Victoria, Australia eO C e c f Complete Specification for the invention entitled: TREATED INORGANIC FILLER
,-I
t The following statement is a full description of the best method of performing it known to us: this invention, including Page 1 Our Ref: #3811 JC:WB 21ecc p r0 -la- This invention relates to inorganic fillers for organic polymer compositions, to a process for preparing such fillers, to organic polymer compositions including such fillers and to articles made from such organic polymer compositions.
In a known process for making glass mat reinforced thermoplastic sheet material a mixture of chopped glass fibres, polypropylene powder and an inorganic filler such as kaolin, calcium carbonate, talc or mica is dispersed in water containing an anionic surfactant using a high speed mixer to form a stable foam and this foam is spread uniformly over the surface of a travelling wire mesh felt similar to that 15 conventionally used in a Fourdrinier paper making S• machine and the aqueous phase is withdrawn through the wire mesh by gravity and suction. The mat of solid materials thus formed on the upper surface of the wire mesh is then dried at a temperature of about 100 0 C and the resultant dried mat may be cut into pieces of *°suitable size, stacked if desired to form a multi-layer S “sheet material and pressed between steel plates at a temperature of about 200 0 C and allowed to cool in the press to form a sheet-like component such as a car bbdy panel. Alternatively, the stacks of cut pieces may be heated to about 200*C my means of a current of hot air or by infra red radiation and subsequently allowed to cool in a press at about 60 0 C to form the sheet-like material.
In addition to the glass fibres, polypropylene and inorganic filler it is often necessary to include in the starting mixture for a glass mat reinforced thermoplastic material a small amount, normally up to about 4% by weight of the total solid material, of carbon black. This is introduced not only to render Sthe final sheet material black in colour, as is often I I II I I I L it c
-II
-2required in commerce, but also to provide a screening effect against the harmful action of ultraviolet radiation on the material. However, when carbon black is introduced into the starting mixture, problems are experienced because of the well known difficulties of handling fine carbon black powder without creating a cloud of black particles which settles out over a wide area. This problem is especially severe when dry carbon black is mixed with a dry thermoplastic material. The retention of the fine carbon black particles in the mat during the forming operation on the wire mesh has also been found to be poor and it is 04 09 generally found that the carbon black is unevenly dispersed in the final dried and pressed material with 15 the result that the sheet material has a veined or mottled appearance with dark areas having a high concentration of carbon black alternating with areas which are light in colour and almost translucent.
Similar handling problems arise when fine carbon o°0° 20 black is incorporated in injection moulding 5 thermoplastic compositions in which carbon black in an amount of about 1% by weight nf the total composition is normally required, and in thermosetting dough moul, .’ng compounds in which the amount of carbon black is usually about 0.5% by weight based on the total C t Cweight of the compound.
Carbon black is the term used to describe a wide range of fine carbon products which may be made by partial combustion or thermal decomposition of hydrocarbons in the vapour phase. The ultimate colloidal units of carbon black may occur as aggregates, which are fused assemblies of particles.
Typically, carbon blacks may have particle diameters up to 500 nanometers. Most carbon blacks have an elemental carbon composition greater than 90%. i GB-A-2179665 describes a process for preparing an 4 If -3 j
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.21 11
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CCC
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inorganic filler which process comprises treating a particulate inorganic material with a natural or synthetic latex composition and dewatering and drying the resultant mixture. The surface-treated inorganic filler can be used with advantage in a polymeric resin composition.
US-A-4366285 relates to a process for producing an elastome-:-filler mixture optionally containing an extender oil. The composite material contains from to 70% by weight of filler based on the weight of the elastomer. In some of the composite materials, a higharomatic extender oil and a finely divided carbon black are included.
EP-0213931 describes a process for preparing an inorganic filler for use in a polymeric resin composition.
The present invention provides a method of incorporating finely divided carbon black pigment into a thermoplastic or thermosetting organic polymer composition in such a way that the handling problems are overcome and the carbon black is substantially uniformly dispersed in the polymer composition.
According to one aspect of the present invention there is provided a process for preparing a coated inorganic filler which comprises: combining, in an aqueous suspension, a particulate inorganic material, a natural or synthetic latex composition and carbon black; and dewatering and drying the resultant mixture; said natural or synthetic latex composition be.4 rg employed in jbspe\ecc 91 8 7 4 1 I 2 an amount such as to provide a coating on the particles of inorganic filler of from 1% to 10% by weight of latex solids based on the weight of dry inorganic material.
According to another aspect of the present invention, said coating on the particulate inorganic material comprising a natural or synthetic 3 *0 340000 r ?2 A4V i jbspe\ecc 91 8 7 L b! i i ~-IY;IUIL^;I;I-;II-,.
-4elastomer and carbon black, wherein the elastomer is present in the coating in an amount of from 1% to by weight, based on the weight of inorganic material.
The particulate inorganic material may be combined or admixed with the latex composition and carbon black sequentially or simultaneously. Admixing may be sequential with the latex composition first being combined in aqueous suspension with the particulate inorganic material to which a dispersed aqueous suspension of the carbon black is then added.
A ternatively, and presently preferred, is first to combine the dispersed aqueous suspension of carbon black with an aqueous suspension of the particulate inorganic material to form a mixed suspension and then 15 to add the latex composition. The resultant mixture of carbon black, inorganic filler and latex may be dewatered and dried by spray drying to form hollow dry micropheres.
The inorganic material may be chosen from a 20 kaolinitic clay kaolin or ball clay), a calcined kaolinitic clay, calcium carbonates, silicates of aluminium and calcium the natural calcium silicate known as wollastonite), bauxite, talc, mica, alumina trihydrate, silica, carbonates and hydroxides of magnesium natural hydrotalcite), dolomite the natural double carbonate of calcium and magnesium), calcium sulphate gypsum), and titanium dioxide. The inorganic material may be natural or synthetic and, in particular, both natural and synthetic forms of calcium carbonate, silicates of aluminium and calcium, silica, carbonates and hydroxides of magnesium, calcium sulphate and titanium dioxide are within the scope of this invention. Where the material is synthetic it may be precipitated (as with calcium carbonate, silica and titanium dioxide).
The inorganic materials specified above may be regarded 5 4 4– 4’4;~ 4,4; 44’r as white inorganic materials; the term “white” used in relation to “inorganic material” does not mean, however, that the mineral necessarily has a pure white colour, but that it is substantially free of any strong nonwhite hue. Many of the inorganic materials which may be employed in the present invention are crystalline.
Preferably, the particles should be no larger than about 100 microns, more preferably 50 microns and most preferably 20 microns, in diameter, Thus, the invention enables carbon black to be incorporated into an organic polymer composition as a component of a coating on an inorganic filler material, the carbon black being held in the coating by a film of a natural or synthetic elastomer material. The three main components (carbon black, inorganic filler and latex) are dispersed together in water preferably containing a dispersing agent, and dewatered and dried, for example by spray drying to form dry microspheres.
Preferably, the process of the invention comprises the following steps: fine carbon black is mixed with water containing a dispersing agent to form a suspension preferably containing from about to about 25% by weight of carbon black; a suspension preferably containing from 50% to 65% (and more preferably no greater than on a dry weight basis of a white inorganic filler and a dispersing agent for the inorganic filler is mixed with the carbon jbspe\ecc 91 8 7 ,-s 17′ 5 i ’11
V
p 1 rr black suspension formed in step in proportions such that the quantity of carbon black is preferably from 0.1% to 10% on a dry weight basis based on the weight of the inorganic filler; there is mixed with the inorganic filler/carbon black suspension formed in step sufficient of a natural or synthetic latex composition latex composition to provide a coating on the particles of organic filler of jbspe\ecc 91 8 7 -6from 1% to 10% by weight of latex solids, based on the weight of the inorganic filler; and d) the mixed suspension formed in step c) is spray dried in a spray dryer to form hollow microspheres of substantially dry material having diameters preferably in the range from about 0.02 mm to about 0.5 mm.
In step a) the dispersing agent may be, for example, a water-soluble salt of poly(acrylic acid), poly(methacrylic acid) or of a copolymer containing 0 from 10% to 80% by weight of acrylonitrile or methacrylonirile monomer units and from 90% to 20% by Sweight of acrylic acid or methacrylic acid monomer units. The number average molecular weight of the water soluble polymer is preferably not more than about 10,000. The amount of the dispersing agent used is preferably in the range from 0.1% to 5% by weight, based on the weight of dry carbon black.
In step b) the inorganic filler may be a. white 20 inorganic material as listed above. The dispersing q. agent for the inorganic filler is advantageously a water soluble salt of poly(acrylic acid) or I poly(methacrylic acid) having a number average molecular weight of not more than 10,000. The inorganic filler does not require any chemical pretreatment other than dispersion with a dispersing agent. The amount of the dispersing agent used is preferably in the range of from 0.05% to 0.5% by weight, based on the weight of the dry inorganic filler.
The latex may be of a natural rubber, or of a natural rubber which has been substituted with functional groups, or a synthetic rubber such as a styrene butadiene rubber (SBR). Other suitable latices include those formed from acrylic copolymers (either elastomeric or non-elastomeric, although -7elastomeric is preferred) and non-elastomeric materials such as poly(vinyl acetate) and copolymers of vinyl acetate. The latex composition, which is a stabilised suspension of polymer particles in water, typically contains about 40% to 60% by weight of solids. The latex may be stabilised with the aid of a surfactant or a water-soluble colloid although a surfactant would normally be employed as it usually gives a latex of Slower viscosity.
The acrylic copolymer may be a copolymer of a i lower alkyl ester of acrylic acid with a. lower alkyl ester of methacrylic acid. Particularly preferred are copolymers of ethyl acrylate and methyl methacrylate.
SAlso suitable are copolymers of one or other or both of 4. 15 a lower alkyl ester of acrylic acid and a lower alkyl Sester of methacrylic acid with a further monomer chosen from vinyl acetate, styrene, acrylonitrile and mixtures thereof. The alkyl chains of the lower alkyl esters of acrylic acid and methacrylic acid preferably have from S 20 one to four carbon atoms.
S The copolymers of vinyl acetate may be those formed by copolymerising vinyl acetate with a F copolymerising monomer chosen from a lower alkyl ester I of acrylic acid, a lower alkyl ester of methacrylic acid, styrene, acrylonitrile and mixtures thereof.
The mixed suspension formed in step c) may also contain other ingredients which are required in certain organic polymer compositions such as antioxidants and metal deactivators. For example an antioxidant, which may be, for example, of the non-staining hindered phenol type, may be mixed with water to form a suspension containing from about 40% by weight to about by weight of the dry antioxidant, and the suspension mixed with the suspension formed in step c) in proportions such as to provide from 0.1% to 10% by weight of the dry antioxidant based on the weight of the dry inorganic filler.
In step d) the inlet temperature of the spray dryer is preferably less than 400 0 C, and most preferably less than 350 0 C, in order to avoid thermal degradation of the elastomer material or combustion of the carbon black.
Coated inorganic material in accordance with the present invention may be incorporated into organic polymer compositions from which articles may be partially, or wholly, formed. The organic polymer composition into which the filler may be incorporated can be in a solid powder) or liquid (i.e.
resin) form. The coated inorganic filler of the o present invention is particularly suited to organic polymer compositions in powder form.
The dry hollow microspheres prepared by the 4 process of the present invention are found to be in the form of a free-flowing powder which can be easily incorporated into an organic polymer composition and the carbon black is so well bound into the microspheres that the material may be poured onto a sheet of white paper with at most only a trace of black staining beine visible after removal of the microspheres. The microspheres may, by adjustment of the gas flow ra-tthrough the spray dryer and of the inlet temperaturf 0 be prepared of such a size that the retention of tnti inicrospheres in, for example, a glass mat reinforced thermoplastic composition is greatly improved. Most advantageously the microspheres should have diameters in the range from 0.3 mm to 0.5 mTm.
In the present invention, any commercial grade of carbon black is suitable; however, fine carbon black, i.e. that having an average particle diameter no greater than 300 nanometers is particularly preferred.
The dry microspheres prepared in accordance with the invention have also been found to be very suitable 7 00 j a 0 0@a
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K.1 -9for incorporation into organic polymer compositions such as injection moulding thermoplastic compositions and dough moulding thermosetting compositions.
The invention is illustrated by the following Examples.
EXAMPLE 1 A carbon black powder having an average particle diameter of 0.02 micrometer was dispersed in a quantity of water so as to form a suspension containing 20% by 10 weight of the carbon black, there being dissolved in the water 2% by weight, based on the weight of the dry carbon black of a sodium polyacrylate dispersing agent having a number average molecular weight of 1680. The carbon black suspension was then added to a suspension 15 which had been formed by mixing a suspension containing by weight of a paper filler grade kaolin clay and 0.2% by weight, based on the weight of dry kaolin, of the same dispersing agent as was used for the carbon black, and a latex containing 50% by weight of an elastomeric acrylic copolymer of ethyl acrylate and methyl methacrylate in proportions such that the quantity of the dry elastomeric copolymer was 5% by weight, based on the weight of dry kaolin clay. The kaolin clay had a particle size distribution such that 20% by weight consisted of particles having an equivalent spherical diameter larger than 10 microns and 35% by weight consisted of particles having an equivalent spherical diameter smaller than 2 microns.
The carbon black suspension was mixed with the kaolin/elastomeric copolymer suspension in proportions such that the quantity of carbon black was 5% by weight, based on the weight of dry kaolin clay.
The resultant mixed suspension was fed to the atomizer of a spray dryer the inlet temperature of which was 300 0 C and the solid components of the mixture were recovered in the form of dry hollow microspheres 0000 00o
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C CC C:1Q Ci~l U: i) of diameters in the range from 0.3 to 0.5 mm.
EXAMPLE 2 A glass mat reinforced thermoplastic composition was prepared according to the following formulation:- Chopped glass fibres Polypropylene powder (0.3 mm 0.5 mm diameter) lO0g Composite filler particles prepared in Example 1 9 i 10 The ingredier: were mixed into 7 litres of water containing 20ml i:n anionic surfactant using a high Sspeed mixer to f a stable foam. The foam was n distributed evenly over a wire mesh screen and the Swater removed by gravity and suction. The resultant felted mat was dried at 100 0 C and then pressed at 200 0
C
between steel plates and allowed to cool in the press.
the resultant glass mat reinforced polypropylene sheet •was a uniform deep black in colour with no visible 1 streaks, veins or mottling. The retention of the 20 filler particles in the mat was also extremely good.
EXAMPLE 3 A further sample of the same carbon black powder as was used in Example 1 was dispersed in water containing 2% by weight, based on the weight of the dry carbon black, of the same dispersing agent as was used in Example 1 to form a suspension containing 20% by weight of the carbon black.
This suspension was then added to a suspension containing 60% by weight of a ground natural mica, having a particle size distribution such that substantially all of the particles had En equivalent spherical diameter smaller than 10 microns, and 0.2% by weight, based on the weight of dry mica, of the same dispersing agent as was used for the carbon black. To -11the mica/carbon black suspension thus formed, there was then added firstly a latex containing 50% by weight of the same acrylic copolymer as was used in Example 1 in proportions such that the quantity of the dry elastomeric copolymer was 5% by weight, based on the weight of dry mica, and secondly a suspension containing 50% by weight of a non-staining antioxidant of the hindered phenol type in proportions such that the quantity of the dry antioxidant was 1% by weight, based on the weight of dry mica. The quantity of tit carbon black in the resultant mixed suspension was by weight, based on the weight of dry mica.
The resultant mixed suspension was spray dried 0. under the same conditions as were described in Example o 15 1 and the solid components of the mixture were S” recovered in the form of dry hollow microspheres of diameters in the range from 0.1 to 0.5 mm.
These microspheres were incorporated into a glass S.mat reinforced thermoplastic composition following the same formulation and method as were described in r Example 2. The resultant glass mat reinforced cc, polypropylene sheet was a uniform black in colour with
C
no visible streaks, veins or mottling. The retention of the filler particles in the mat was also extremely good.
EXAMPLE 4 The experiment of Example 3 was repeated except that the mica was replaced by an equal quantity of a synthetic alumina trihydrate having a particle size distribution such that substantially all the particles had an equivalent spherical diameter smaller than microns.
Again the resultant glass mat reinforced polypropylene sheet was a uniform black in colour with no visible streaks, veins or mottling. The retention of the filler particles in the mat was extremely good.
The claims form part of the disclosure of this specification.

Claims (21)

2. A process according to claim i, wherein the 0. carbon black is employed in an amount such as to oo provide in the coating from 0.1% to 10% by weight of 15 dry carbon black based on the weight of the inorganic filler.

3. A process according to claim 1 or 2, wherein the inorganic material and the latex composition are e added, either sequentially or simultaneously, to an 20 aqueous suspension of the carbon black.

4. A process according to claim 3, wherein the T I aqueous suspension of the carbon black is dispersed with the aid of a dispersing agent. A process according to claim 3 or 4, wherein the aqueous suspension of carbon black contains from to 25% by weight of carbon black.

6. A process according to any preceding claim, wherein the particulate inorganic material is employed in the form of an aqueous suspension.

7. A process according to claim 6, wherein the aqueous suspension of the inorganic material contains from 50% to 65% by weight of the inorganic material.

8. A process according to claim 6 or 7, wherein the aqueous suspension of inorganic filler is dispersed with the aid of a dispersing agent.

9. A process according to any preceding claim, I -13- wherein the mixture of inorganic material, latex and carbon black is spray dried to form hollow microspheres. A process according to any preceding claim, wherein the particulate inorganic material is chosen from a kaolinitic clay, a calcined kaolinitic clay, a calcium carbonate, silicates of calcium and aluminium, bauxite, talc, mica, alumina trihydrate, silica, carbonates and hydroxides of magnesium, dolomite, calcium sulphate and titanium dioxide. rr, 11. A process according to any preceding claim, wherein the latex solids are chosen from a natural rubber, a natural rubber which has been substituted S” with functional groups, a synthetic rubber, an acrylic copolymer, a poly(vinyl acetate) and copolymers of vinyl acetate.

12. A process for preparing a latex coated inorganic filler which process comprises admixing a particulate inorganic material chosen from a kaolinitic CC 20 clay, a calcined kaolinitic clay, a calcium carbonate, CC silicates of calcium and aluminium, bauxite, talc, C C e s mica, alumina trihydrate, silica, carbonates and hydroxides of magnesium, dolomite, calcium sulphate or ctitanium dioxide, with an aqueous suspension of fine carbon black and a natural or synthetic latex composition which comprises a suspension of polymer particles in water wherein the latex solids are chosen from a natural rubber, a natural rubber which has been substituted with functional groups, a synthetic rubber, an acrylic copolymer, a poly(vinyl acetate) and a copolymer of vinyl acetate, and dewatering and drying the resultant mixture, the amount of the natural or synthetic latex composition added being such as to provide a coating on the particles of inorganic filler of from about 1% to about 10% by weight of latex solids based on the weight of dry ink.rganic material. (1111_-~;i1. Irr It:. C 14

13. A process for preparing an inorganic filler comprising: forming a dispersed aqueous suspension of fine carbon black which contains from about 5% to 25% by weight, on a dry weight basis, of the carbon black; forming a dispersed aqueous suspension of a white inorganic material containing from about 50% to about 65% by weight on a dry weight basis, of the inorganic material; combining the aqueous suspension of the inorganic material with a natural or synthetic latex composition, the latex being employed in an amount such as to provide a coating on the particles of inorganic filler of from about 1% to about 10% by weight of latex solids, based on the weight of the inorganic material; combining the dispersed aqueous suspension of carbon black with the inorganic material/latex suspension formed in step in proportions such that the quantity of carbon black is from about 0.1% to about on a dry weight basis, based on the weight of the inorganic material; and spray drying the suspension formed in step (d) to form hollow microspheres of substantially dry material having diameters in the range of from about 0.02 mm to about 0.5 mm.

14. A process for preparing an inorganic filler comrrising: forming a dispersed aqueous suspension of fine carbon black which contains from about 5% to 25% by 1 rr i’ iLei 9 i ~Jlvs jbspe\ecc 91 8 7 weight, on a dry weight basis, of the carbon black; forming a dispersed aqueous suspension of a white inorganic material containing from about 50% to about 65-% by weight on a dry weight basis, of the inorganic material; combining the aqueous suspension of the inorganic material with the dispersed aqueous suspension of carbon black formed in step in proportions such that the quantity of carbon black is from about 0.1% to about 10% on a dry weight basis, based on the weight of the inorganic material; combining the inorganic material/carbon black suspension formed in step with a natural or synthetic latex composition, the latex being employed in an amount such as to provide a coating on the particles of inorganic filler from about 1% to about 10% by weight of latex solids, based on the weight of the inorganic material; and spray drying the suspension formed in step (d) to form hollow microspheres of substantially dry 1,:…:material having diameters in the range of f rom about 0.02 mm to about 0.5 mm. A coated inorganic filler whenever prepared by a process as claimed in any preceding claim.

16. A coated particulate inorganic material, said coating on the particulate inorganic material comprising a natural or synthetic elastomer and carbon black, wherein the elastomer is present in the coating in an amount of from 1% to 10% by weight, based on the weight jbspe\ecc 91 8 7 PAK~ 16 of inorganic material.

17. A coated inorganic material according to claim 16, wherein the carbon black is present in the coating in an amount of from 0.1% to 10% by weight, based on the weight of the inorganic material.

18. A coated inorganic material according to claim 16 or 17, in the form of hollow microspheres.

19. A coated inorganic material according to claim 16, 17 or 18, wherein the particulate inorganic material is chosen from a kaolinitic clay, a calcined kaolinitic clay, a calcium carbonate, silicates of calcium and aluminum, bauxite, talc, mica, alumina trihydrate, silica, carbonates and hydroxides of magnesium, dolomite, calcium sulphate and titanium dioxide.

20. A coated inorganic material according to claim 16, 17, 18 or 19, wherein the elastomer is chosen from a natural rubber, a natural rubber which has been substituted with functional groups, a synthetic rubber, an acrylic copolymer, a poly(vinyl acetate) and I’ 20 copolymers of vinyl acetate. it r

21. An organic polymer composition which comprises (a) an organic polymeric material and a coated inorganic filler as claimed in any one of claims 16 to 20 or as prepared by a process as claimed in any one of claims 1 to 14.

22. An organic polymer composition as claimed in claim 21, wherein the polymeric material is a thermoplastic or a thermosetting material.

23. An article formed, either partially or wholly, from jbspe\ecc 91 8 7 17 an organic polymer composition as claimed in claim 21 or 22.

24. A process for preparing a coated inorganic filler, substantially as hereinbefore described with reference to the accompanying Examples. A coated inorganic material, substantially as hereinbefore described with reference to the accompanying Examples.

26. An organic polymer composition, substantially as hereinbefore described with reference to the accompanying Examples.

27. An article according to claim 23, substantially as hereinbefore described with reference to the accompanying Examples. DATED this 91 8 7 CARTER SMITH BEADLE Fellows Institute of Patent Attorneys of Australia Patent Attorneys for the Applicant: ECC INTERNATIONAL LIMITED Sbspe\ecc 91 8 7 *?r l A T

AU37917/89A
1988-07-13
1989-07-06
Treated inorganic filler

Ceased

AU620115B2
(en)

Applications Claiming Priority (4)

Application Number
Priority Date
Filing Date
Title

GB8816622

1988-07-13

GB888816622A

GB8816622D0
(en)

1988-07-13
1988-07-13
Treated inorganic filler

US28356488A

1988-12-13
1988-12-13

US283564

1988-12-13

Publications (2)

Publication Number
Publication Date

AU3791789A

AU3791789A
(en)

1990-01-18

AU620115B2
true

AU620115B2
(en)

1992-02-13

Family
ID=26294157
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

AU37917/89A
Ceased

AU620115B2
(en)

1988-07-13
1989-07-06
Treated inorganic filler

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Link

EP
(1)

EP0359362B1
(en)

JP
(1)

JP2680134B2
(en)

KR
(1)

KR0127303B1
(en)

AT
(1)

ATE120785T1
(en)

AU
(1)

AU620115B2
(en)

BR
(1)

BR8903448A
(en)

CA
(1)

CA1331410C
(en)

DE
(1)

DE68922052T2
(en)

ES
(1)

ES2070905T3
(en)

GB
(1)

GB2220666B
(en)

NZ
(1)

NZ229907A
(en)

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1990-08-08
1992-08-13
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Surface-treated fillers and rubber compositions containing the same

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1991-12-03
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1993-03-31
1996-12-11
Ecc Int Ltd
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1993-05-20
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1993-07-07
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1994-07-13
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1999-01-20
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Composite material made of polyurethane and at least one thermoplastic, a process for its manufacture and its use in motor vehicles

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2012-09-12
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Process for manufacture of fillers having improved bulk density stability and flowability

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2005-07-19
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2009-06-18
Giang Biscan
Manufacture and use of engineered carbide and nitride composites

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2011-08-16
James Hardie Technology Limited
Composite cement article incorporating a powder coating and methods of making same

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2005-02-24
2008-04-09
詹姆斯哈迪国际财金公司
Alkali resistant glass compositions

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2005-10-04
2007-10-10
주식회사 엘지화학
Spherical porous organic-inorganic pigment composition and method for preparing thereof

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2013-12-17
James Hardie Technology Limited
Engineered low-density heterogeneous microparticles and methods and formulations for producing the microparticles

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2006-04-12
2013-07-17
Hardie James Technology Ltd
A surface sealed reinforced building element

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2007-12-20
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Structural fiber cement building materials

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2013-06-12
2015-04-28
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Glass microspheres comprising sulfide, and methods of producing glass microspheres

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2014-12-30
2020-11-11
코오롱글로텍주식회사
Thermal transfer film having cubic effect for fabric

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1989-06-26
GB
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1989-06-29
AT
AT89306595T
patent/ATE120785T1/en
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IP Right Cessation

1989-06-29
ES
ES89306595T
patent/ES2070905T3/en
not_active
Expired – Lifetime

1989-06-29
DE
DE68922052T
patent/DE68922052T2/en
not_active
Expired – Fee Related

1989-06-29
EP
EP89306595A
patent/EP0359362B1/en
not_active
Expired – Lifetime

1989-07-06
AU
AU37917/89A
patent/AU620115B2/en
not_active
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1989-07-11
NZ
NZ229907A
patent/NZ229907A/en
unknown

1989-07-11
CA
CA000605504A
patent/CA1331410C/en
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1989-07-13
KR
KR1019890009965A
patent/KR0127303B1/en
not_active
IP Right Cessation

1989-07-13
JP
JP1181636A
patent/JP2680134B2/en
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AU627105B2
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1990-08-08
1992-08-13
Sumitomo Chemical Company, Limited
Surface-treated fillers and rubber compositions containing the same

Also Published As

Publication number
Publication date

DE68922052D1
(en)

1995-05-11

GB2220666B
(en)

1992-01-02

AU3791789A
(en)

1990-01-18

NZ229907A
(en)

1991-08-27

EP0359362A2
(en)

1990-03-21

EP0359362A3
(en)

1991-09-18

KR0127303B1
(en)

1997-12-26

JPH0267341A
(en)

1990-03-07

ES2070905T3
(en)

1995-06-16

BR8903448A
(en)

1990-03-06

JP2680134B2
(en)

1997-11-19

CA1331410C
(en)

1994-08-09

KR900001769A
(en)

1990-02-27

DE68922052T2
(en)

1995-08-03

ATE120785T1
(en)

1995-04-15

GB8914618D0
(en)

1989-08-16

EP0359362B1
(en)

1995-04-05

GB2220666A
(en)

1990-01-17

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