GB1243504A – Microporous films
– Google Patents
GB1243504A – Microporous films
– Google Patents
Microporous films
Info
Publication number
GB1243504A
GB1243504A
GB3504267A
GB3504267A
GB1243504A
GB 1243504 A
GB1243504 A
GB 1243504A
GB 3504267 A
GB3504267 A
GB 3504267A
GB 3504267 A
GB3504267 A
GB 3504267A
GB 1243504 A
GB1243504 A
GB 1243504A
Authority
GB
United Kingdom
Prior art keywords
solvent
polymer
film
filler
mixture
Prior art date
1963-11-25
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3504267A
Inventor
Keith Gordon Wyness
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Porvair PLC
Original Assignee
Porvair PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1963-11-25
Filing date
1967-07-31
Publication date
1971-08-18
1963-11-25
Priority claimed from GB46529/63A
external-priority
patent/GB1099676A/en
1967-07-31
Application filed by Porvair PLC
filed
Critical
Porvair PLC
1967-07-31
Priority to GB3504267A
priority
Critical
patent/GB1243504A/en
1968-07-25
Priority to FR160631A
priority
patent/FR95376E/en
1968-07-29
Priority to NL6810718A
priority
patent/NL6810718A/xx
1968-07-30
Priority to DK368068A
priority
patent/DK125193B/en
1968-07-30
Priority to DE19681779312
priority
patent/DE1779312A1/en
1971-08-18
Publication of GB1243504A
publication
Critical
patent/GB1243504A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
B—PERFORMING OPERATIONS; TRANSPORTING
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
B29C67/00—Shaping techniques not covered by groups B29C39/00 – B29C65/00, B29C70/00 or B29C73/00
B29C67/20—Shaping techniques not covered by groups B29C39/00 – B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
B29C67/202—Shaping techniques not covered by groups B29C39/00 – B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising elimination of a solid or a liquid ingredient
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
Abstract
1,243,504. Porous coating. PORVAIR Ltd. 29 July, 1968 [31 July, 1967], No. 35042/67. Addition to 1,099,676. Heading B2E. [Also in Division C3] A method of making a microporous film which includes forming a spreadable mixture of a synthetic polymer, a finely divided removable solid filler, and a solvent for the polymer forming a coating of the mixture in the form of a film on a support e.g. a fabric, removing the solvent by evaporation, leaching out the filler with a liquid which is a solvent for it but not for the polymer, and drying the film; the amount and nature of the solvent are selected for the particular polymer so that the polymer is completely dissolved in the solvent and the mixture is a homogeneous suspension of a solid phase, the removable filler, in a liquid phase, the solution of the polymer in the solvent, and the amount of solvent based on the total weight of the spreadable mixture is less than 43% but more than 27%, and the ratio of removable filler to polymer in parts by weight is in the range 1 to 1 to 5 to 1, and the particle size of the removable filler is not greater than 50 microns and the support is such that the film adheres to it, and the support is adapted or arranged to support the film in such a way that while the solvent is removed the film is prevented from contracting in length and breadth while being allowed to shrink in thickness, the properties and nature of the ingredients being such that no other measures need to be taken to nullify encapsulation of the removable filler, and no such other measures are taken. The polymer may be a polyurethane, polymethyl methacrylate, polystyrene, nylon or a mixture of polyvinyl chloride with a nitrile rubber or plasticizer e.g. polypropylene sebacate. The removable filler may be sodium chloride and the solvent may be dimethyl cyclohexanone.
GB3504267A
1963-11-25
1967-07-31
Microporous films
Expired
GB1243504A
(en)
Priority Applications (5)
Application Number
Priority Date
Filing Date
Title
GB3504267A
GB1243504A
(en)
1963-11-25
1967-07-31
Microporous films
FR160631A
FR95376E
(en)
1963-11-25
1968-07-25
Improvements in microporous materials.
NL6810718A
NL6810718A
(en)
1963-11-25
1968-07-29
DK368068A
DK125193B
(en)
1963-11-25
1968-07-30
Process for the production of microporous films.
DE19681779312
DE1779312A1
(en)
1963-11-25
1968-07-30
Process for producing a fine-pored film
Applications Claiming Priority (3)
Application Number
Priority Date
Filing Date
Title
GB46529/63A
GB1099676A
(en)
1963-11-25
1963-11-25
Improvements in or relating to microporous sheet material
GB4302964
1964-10-21
GB3504267A
GB1243504A
(en)
1963-11-25
1967-07-31
Microporous films
Publications (1)
Publication Number
Publication Date
GB1243504A
true
GB1243504A
(en)
1971-08-18
Family
ID=10373111
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3504267A
Expired
GB1243504A
(en)
1963-11-25
1967-07-31
Microporous films
Country Status (5)
Country
Link
DE
(1)
DE1779312A1
(en)
DK
(1)
DK125193B
(en)
FR
(1)
FR95376E
(en)
GB
(1)
GB1243504A
(en)
NL
(1)
NL6810718A
(en)
1967
1967-07-31
GB
GB3504267A
patent/GB1243504A/en
not_active
Expired
1968
1968-07-25
FR
FR160631A
patent/FR95376E/en
not_active
Expired
1968-07-29
NL
NL6810718A
patent/NL6810718A/xx
unknown
1968-07-30
DK
DK368068A
patent/DK125193B/en
unknown
1968-07-30
DE
DE19681779312
patent/DE1779312A1/en
active
Pending
Also Published As
Publication number
Publication date
DK125193B
(en)
1973-01-15
FR95376E
(en)
1970-09-11
DE1779312A1
(en)
1971-09-09
NL6810718A
(en)
1969-02-04
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