Thermal stabilization of acetal polymers
AssigneeCelanese Corporation
InventorsAndrew B. Auerbach, Thomas C. Yu
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Abstract
Stabilized acetal polymer molding compositions are formed by first preparing an intimate dispersion of an amidine stabilizer in a carrier resin comprising an ionic polymer, i.e. an "ionomer", and compounding the dispersion with the acetal polymer. The resulting composition is found in many cases to have improved stability over compositions prepared by adding the amidine compound in an undispersed form.
Claims18
A method of preparing a stabilized acetal polymer composition comprising forming an intimate dispersion of an amidine stabilizer in a carrier resin comprising an ionomer at a temperature above the softening point of said resin and compounding said dispersion with said acetal polymer, said carrier resin having a melting or softening point no higher than the melting point of the acetal polymer.
Dependencies are inferred from the claim text.