Stabilized polyacetal compositions containing a mixture of HALS

Details Stabilized polyacetal compositions containing a mixture of HALS Stabilized polyacetal compositions containing a mixture of HALS

1991-03-22

1992-09-22

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 97, 524100, 524102, 524 90, 524 91, C08K 534

Patent

active

051497239

ABSTRACT:
This invention relates to polyacetal compositions that are stabilized against ultraviolet light and heat degradation due to the inclusion therein of a mixed hindered amine light stabilizer (HALS) system, wherein each HALS of the system contains a hindered amine that is of tertiary functionality.

REFERENCES:
patent: 4086204 (1978-04-01), Cassandrini et al.
patent: 4233412 (1980-11-01), Rody et al.
patent: 4331586 (1982-05-01), Hardy
patent: 4446263 (1984-05-01), Bryant
patent: 4717745 (1988-01-01), Ishii
patent: 4730015 (1988-03-01), Ikenaga et al.
patent: 4863981 (1989-09-01), Gugumus
patent: 4929652 (1990-05-01), Gugumus

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