Thermal stabilization of acetal polymers
US4731397A · kind A · utility
6Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1985 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Sep 20, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Stabilized acetal polymer molding compositions are formed by first preparing an intimate dispersion of cyanoguanidine or melamine in a carrier resin, e.g. a non-ionic carrier resin such as an ethylene/ethyl acrylate copolymer, and compounding the dispersion with the acetal polymer. The resulting composition is found in many cases to have improved thermal stability over compositions prepared by adding the cyanoguanidine or melamine as pure crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.