Thermal stabilization of acetal polymers

Details Thermal stabilization of acetal polymers Thermal stabilization of acetal polymers

1985-09-20

1988-03-15

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523333, 523461, 524100, 524101, 524502, 524512, 524513, 524539, 524542, C08K 534, C08F28300

Patent

active

047313978

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.

REFERENCES:
patent: 2993025 (1961-07-01), Alsup et al.
patent: 3424819 (1969-01-01), Green
patent: 4098843 (1978-07-01), Johnson
patent: 4208320 (1980-06-01), Chono et al.
patent: 4342680 (1982-08-01), Sugio et al.
patent: 4351916 (1982-09-01), Kohan
patent: 4386178 (1983-05-01), Schuette et al.
patent: 4394468 (1983-07-01), Lu

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