Polyacetal stabilizer formulation with improved color stability

Details Polyacetal stabilizer formulation with improved color stability Polyacetal stabilizer formulation with improved color stability

1988-02-09

1989-06-27

Morgan, Kriellion

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524538, 524542, C08K 534, C08L 5100

Patent

active

048431150

ABSTRACT:
An oxymethylene polymer composition which exhibits a reduced tendency to form mold deposits upon molding, reduced tendency to discolor under thermal stress and low extractable formaldehyde levels is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a cyclic amidine compound of the formula: ##STR1## wherein R is phenyl, polynuclear aromatic, heterocyclic, cycloaliphatic and aliphatic containing at least 6 carbon atoms, as well as substituted derivatives of the listed substituents.

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