Stabilized polyacetal compositions

Details Stabilized polyacetal compositions Stabilized polyacetal compositions

1991-03-22

1993-08-03

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524102, 524 91, 524208, 524241, 524359, C08K 534

Patent

active

052329658

ABSTRACT:
Incorporation of at least one hindered amine light stabilizer ("HALS") compound having a hindered phenol group and a piperidine ring or oxo-piperazinyl ring, provided that each such ring has a hindered amine, at the N.sup.4 position in the ring, that is of tertiary functionality, into polyacetal homopolymer compositions improves the UV stability, and does not significantly degrade the melt processing thermal stability, of said composition.
Incorporation of (a) a HALS compound having an s-triazine group, along with a piperidine ring or an oxo-piperazinyl ring, (provided each such ring has a hindered amine at the N.sup.4 position in the ring), and (b) a HALS as described in the preceding paragraph into polyacetal polymer compositions improves the UV stability, and does not significantly degrade the thermal stability of said composition.
The composition of the present invention are useful in polyacetal applications where enhanced UV stability is desired.

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RD 25433 -Research Disclosure, Jun. 1985.

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