Polymetic hindered amine light stabilizers

Details Polymetic hindered amine light stabilizers Polymetic hindered amine light stabilizers

1988-11-23

1990-01-23

Seccuro, Carman J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5251675, 525172, 525194, 525227, 525228, C08L 2310, C08L 3308, C08L 7504, C08L 6700

Patent

active

048959014

ABSTRACT:
The present invention relates to novel compounds corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.4 may be the same or different, and each is a lower alkyl radical; R.sub.2 and R.sub.3 may be the same or different, and each is a substituted piperidine radical; M is equal to the total number of monomer units in the polymer chain, and is of a magnitude sufficient to provide a polymer having a molecular weight of at least 500; W is equal to at least 0.5, X is equal to at least 0.1 but not greater than 0.2, Y is equal to at least 0.1, Z is equal to at least 0.05 but not greater than 0.2, and W plus X plus Y plus Z is equal to 1.
These novel compounds are useful as stabilizers for a wide variety of organic materials and are prepared by transesterification of a suitable acrylate-methacrylate copolymer.

REFERENCES:
patent: 4153596 (1979-05-01), Oertel et al.
patent: 4308362 (1981-12-01), Wiezer et al.
patent: 4314933 (1982-02-01), Berner
patent: 4520171 (1985-05-01), Dineley et al.
patent: 4696959 (1987-09-01), Chang et al.

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