GB1165236A - Method for Stabilising Polyoxymethylene - Google Patents
Method for Stabilising PolyoxymethyleneInfo
- Publication number
- GB1165236A GB1165236A GB2962067A GB2962067A GB1165236A GB 1165236 A GB1165236 A GB 1165236A GB 2962067 A GB2962067 A GB 2962067A GB 2962067 A GB2962067 A GB 2962067A GB 1165236 A GB1165236 A GB 1165236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyoxymethylene
- sulphite
- radiolysis
- polyoxymethylenes
- june
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Artificial Filaments (AREA)
Abstract
1,165,236. Stabilizing polyoxymethylene by after-treatment. SOC. CHIMIQUE DES CHARBONNAGES. 27 June, 1968 [27 June, 1967], No. 29620/67. Heading C3P. Polyoxymethylenes having a reduced viscosity of from 0.7 to 1.1 and a sulphite number of up to 7.5 and a decomposition constant at 222‹ C. of less than 5, are stabilized by reaction with an acid anhydride, isocyanate or isothiocyanate in the presence of an antioxidant having blocked phenolic groups, at a temperature above the melting-point of the polyoxymethylene, and then adding a formaldehyde acceptor to the molten product obtained. The initial polyoxymethylene may be obtained by subjecting a polyoxymethylene, obtained by the radiochemical polymerization of trioxan in the solid phase and having a reduced viscosity greater than 3 and a sulphite number less than 5, to controlled radiolysis with ionizing radiation. In the examples, polyoxymethylenes with viscosities and sulphite numbers in the specified ranges, obtained by radiolysis of higher molecular weight polymers, were reacted with butyric anhydride, acetic anhydride, phenyl isocyanate, and phenyl isocyanate in the presence of antioxidants containing etherified phenolic groups, and the product mixed with biuret, polyesteramides or a nylon polyamide.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2962067A GB1165236A (en) | 1967-06-27 | 1967-06-27 | Method for Stabilising Polyoxymethylene |
FR1579032D FR1579032A (en) | 1967-06-27 | 1968-06-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2962067A GB1165236A (en) | 1967-06-27 | 1967-06-27 | Method for Stabilising Polyoxymethylene |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1165236A true GB1165236A (en) | 1969-09-24 |
Family
ID=10294451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2962067A Expired GB1165236A (en) | 1967-06-27 | 1967-06-27 | Method for Stabilising Polyoxymethylene |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1579032A (en) |
GB (1) | GB1165236A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2460465A1 (en) * | 1973-12-28 | 1975-07-10 | Sir Soc Italiana Resine Spa | PROCESS FOR MANUFACTURING AND STABILIZING POLYOXYMETHYLENE |
WO2005059030A1 (en) | 2003-12-18 | 2005-06-30 | Ticona Gmbh | Polyoxymethylene molding compounds and use thereof |
-
1967
- 1967-06-27 GB GB2962067A patent/GB1165236A/en not_active Expired
-
1968
- 1968-06-17 FR FR1579032D patent/FR1579032A/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2460465A1 (en) * | 1973-12-28 | 1975-07-10 | Sir Soc Italiana Resine Spa | PROCESS FOR MANUFACTURING AND STABILIZING POLYOXYMETHYLENE |
WO2005059030A1 (en) | 2003-12-18 | 2005-06-30 | Ticona Gmbh | Polyoxymethylene molding compounds and use thereof |
Also Published As
Publication number | Publication date |
---|---|
FR1579032A (en) | 1969-08-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PCNP | Patent ceased through non-payment of renewal fee |