GB1060912A – Formaldehyde polymers
– Google Patents
GB1060912A – Formaldehyde polymers
– Google Patents
Formaldehyde polymers
Info
Publication number
GB1060912A
GB1060912A
GB15004/65A
GB1500465A
GB1060912A
GB 1060912 A
GB1060912 A
GB 1060912A
GB 15004/65 A
GB15004/65 A
GB 15004/65A
GB 1500465 A
GB1500465 A
GB 1500465A
GB 1060912 A
GB1060912 A
GB 1060912A
Authority
GB
United Kingdom
Prior art keywords
acid
polyoxymethylene
methanol
solution
formaldehyde
Prior art date
1964-04-13
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
GB15004/65A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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.)
1964-04-13
Filing date
1965-04-08
Publication date
1967-03-08
1965-04-08
Application filed by Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
filed
Critical
Montedison SpA
1967-03-08
Publication of GB1060912A
publication
Critical
patent/GB1060912A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
C08G2/08—Polymerisation of formaldehyde
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
C08G2/12—Polymerisation of acetaldehyde or cyclic oligomers thereof
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
C08G2/14—Polymerisation of single aldehydes not provided for in groups C08G2/08 – C08G2/12
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
C08G2/16—Polymerisation of single ketones
Abstract
Formaldehyde polymers of high molecular weight are prepared by feeding a concentrated aqueous formaldehyde solution to a suspension of a solid polyoxymethylene in an aqueous formaldehyde solution having a formaldehyde concentration between the equilibrium concentration and the stability limit of the system at a temperature of from 0 DEG to 60 DEG C. in the presence of a strong acid having pKa<2 for each hydrogen whose concentration in the aqueous solution is kept such that the polymers prepared have an X-ray crystallinity of 100%, of which at least 50% is in the orthorhombic crystalline form and the remainder in the hexagonal crystalline form. The process may be carried out in the presence of a linear aliphatic alcohol having from 1 to 5 carbon atoms in the molecule, e.g. methanol, whose concentration in the liquid phase is kept at a value lower than 25% by weight of solution. The polymerization may take place in the presence of a salt of an inorganic base with a strong organic or inorganic acid having a pK<2 for each hydrogen whose concentration in the solution is kept at a value lower than or equal to the saturation concentration of the salt in the system. The products may consist of a polymeric mixture consisting of from 5 to 75% of polyoxymethylene diethers, of from 95 to 25% of polyoxymethylene glycols and polyoxymethylene-monoethers in which all of the components of the mixture have an X-ray crystallinity of 100% of which at least 50% is in the orthorhombic crystalline form and the remainder in the hexagonal crystalline form-treatment with sodium carbonate at 100-220 DEG C. gives the polyoxymethylene-diethers. The reactants may be added batchwise or continuously. In Example (1) a suspension of polyoxymethylene in an aqueous solution containing water and formaldehyde are added every hour after withdrawing the same amount by weight of suspension, formaldehyde solution and 10 N sodium hydroxide solution and every 24 hours an amount of the suspension is discharged and the polyoxymethylene recovered. Similarly, in further examples the sodium hydroxide is replaced by (2)-(12) and (25) sulphuric acid, (13)-(15) p-toluene sulphonic acid, (16)-(20) perchloric acid, (21)-(24) hydrochloric acid, (26)-(29) and (38) hydrochloric acid and methanol, (30) and (31) hydrochloric acid, methanol and sodium chloride, (32) hydrochloric acid, methanol and potassium chloride, (33)-(35) sulphuric acid and methanol, (36) and (37) perchloric acid and methanol, (39) sulphuric acid and ethanol, (40) n-propanol and sulphuric acid and (41) n-butanol and sulphuric acid.
GB15004/65A
1964-04-13
1965-04-08
Formaldehyde polymers
Expired
GB1060912A
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
IT809964
1964-04-13
IT2645264
1964-12-11
Publications (1)
Publication Number
Publication Date
GB1060912A
true
GB1060912A
(en)
1967-03-08
Family
ID=26325971
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB15004/65A
Expired
GB1060912A
(en)
1964-04-13
1965-04-08
Formaldehyde polymers
Country Status (7)
Country
Link
US
(1)
US3425991A
(en)
BE
(1)
BE662371A
(en)
CH
(1)
CH499561A
(en)
DE
(1)
DE1271398B
(en)
FR
(1)
FR1438599A
(en)
GB
(1)
GB1060912A
(en)
NL
(1)
NL143599B
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS60232085A
(en)
*
1984-04-28
1985-11-18
Kanegafuchi Chem Ind Co Ltd
Method for germ-free filtration
US5852208A
(en)
*
1996-08-30
1998-12-22
Dixie Chemical Company, Inc.
Method of producing compounds containing acyloxyalkoxy groups from alcohols
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
BE570884A
(en)
*
1957-09-06
1900-01-01
AT217211B
(en)
*
1957-09-06
1961-09-11
Du Pont
Process for the polymerization of formaldehyde to form high molecular weight polyoxymethylene
US3027352A
(en)
*
1958-02-28
1962-03-27
Celanese Corp
Copolymers
1965
1965-04-01
NL
NL656504119A
patent/NL143599B/en
unknown
1965-04-08
GB
GB15004/65A
patent/GB1060912A/en
not_active
Expired
1965-04-12
CH
CH508265A
patent/CH499561A/en
not_active
IP Right Cessation
1965-04-12
DE
DEP1271A
patent/DE1271398B/en
not_active
Withdrawn
1965-04-12
FR
FR12835A
patent/FR1438599A/en
not_active
Expired
1965-04-12
US
US448578A
patent/US3425991A/en
not_active
Expired - Lifetime
1965-04-12
BE
BE662371D
patent/BE662371A/xx
unknown
Also Published As
Publication number
Publication date
BE662371A
(en)
1965-10-12
NL143599B
(en)
1974-10-15
FR1438599A
(en)
1966-05-13
NL6504119A
(en)
1965-10-14
CH499561A
(en)
1970-11-30
US3425991A
(en)
1969-02-04
DE1271398B
(en)
1968-06-27
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