Method of stabilizing oxymethylene copolymers
US4035338A · kind A · utility
1Cited by
4References
16Claims
0Family size
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Key dates
| Filing date | Jun 17, 1975 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Jun 17, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2/36
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of stabilizing oxymethylene copolymers which comprises heating an oxymethylene copolymer in a hydrocarbonaceous mixed medium consisting of about 50 - 92% by weight of a hydrocarbon having 5 - 7 carbon atoms, about 6 - 48% by weight of an alcohol and about 2 - 20% by weight of water based on the total amount of the medium, at a temperature of from about 100.degree. to about 170.degree. C. in the presence of a salt selected from the group consisting of the sodium and potassium salts of ethylenediaminetetraacetic acid under the conditions of a pH value of from about 4 to about 7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.