GB994254A - A process for the preparation of acylated high molecular weight polyoxymethylenes - Google Patents
A process for the preparation of acylated high molecular weight polyoxymethylenesInfo
- Publication number
- GB994254A GB994254A GB5137863A GB5137863A GB994254A GB 994254 A GB994254 A GB 994254A GB 5137863 A GB5137863 A GB 5137863A GB 5137863 A GB5137863 A GB 5137863A GB 994254 A GB994254 A GB 994254A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyoxymethylene
- acetic anhydride
- preparation
- molecular weight
- high molecular
- Prior art date
- 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
Links
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
- C08G2/30—Chemical modification by after-treatment
- C08G2/32—Chemical modification by after-treatment by esterification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/04—Pressure vessels, e.g. autoclaves
- B01J3/042—Pressure vessels, e.g. autoclaves in the form of a tube
-
- 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
- C08G2/18—Copolymerisation of aldehydes or ketones
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Polyoxymethylene is reacted with acetic anhydride at above 150 DEG C. at a pressure of 2 to 20 atmospheres from 2 to 20 minutes, the reaction mixture added to pure acetic anhydride of temperature 100 DEG to 130 DEG C., and the acetylated polyoxymethylene which is precipitated in a finely divided form is recovered. The reaction may take place continuously in a flow tube, in a mixture of acetic anhydride and methylene glycol diacetate and in the presence of sodium acetate as catalyst. The starting polyoxymethylene may be partially esterified or alkylated polyoxymethylene. Apparatus for carrying out the process is described. Specifications 864,403 and 868,356 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF38704A DE1182823B (en) | 1963-01-03 | 1963-01-03 | Process for the acylation of high molecular weight polyoxymethylenes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB994254A true GB994254A (en) | 1965-06-02 |
Family
ID=7097462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5137863A Expired GB994254A (en) | 1963-01-03 | 1963-12-31 | A process for the preparation of acylated high molecular weight polyoxymethylenes |
Country Status (6)
Country | Link |
---|---|
AT (1) | AT249368B (en) |
BE (1) | BE641923A (en) |
CH (1) | CH434750A (en) |
DE (1) | DE1182823B (en) |
GB (1) | GB994254A (en) |
NL (1) | NL301909A (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL196512A (en) * | 1954-04-16 | |||
BE586592A (en) * | 1959-01-16 |
-
0
- NL NL301909D patent/NL301909A/xx unknown
-
1963
- 1963-01-03 DE DEF38704A patent/DE1182823B/en active Pending
- 1963-12-09 CH CH1506063A patent/CH434750A/en unknown
- 1963-12-16 AT AT1009163A patent/AT249368B/en active
- 1963-12-30 BE BE641923A patent/BE641923A/xx unknown
- 1963-12-31 GB GB5137863A patent/GB994254A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE641923A (en) | 1964-04-16 |
AT249368B (en) | 1966-09-26 |
CH434750A (en) | 1967-04-30 |
NL301909A (en) | |
DE1182823B (en) | 1964-12-03 |
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