Piperidinyl phthalimide hindered amine light stabilizers

Details Piperidinyl phthalimide hindered amine light stabilizers Piperidinyl phthalimide hindered amine light stabilizers

1993-08-26

1995-04-18

Lipman, Bernard

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

Synthetic resins

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

5253283, 5253285, 5253291, 5253293, 525375, 525408, 525437, 525447, 525474, C08F 830

Patent

active

054080088

ABSTRACT:
Hindered amine light stabilizers are provided in which the hindered amine is contained in a unit of formula ##STR1## where X is ##STR2## and R.sup.1, R.sup.2, R.sup.3, and A are as defined as in the Summary of the Invention. Unique polymeric and non-polymeric compounds containing this unit are useful as additives for the stabilization of polymeric compositions which are normally subject to thermal, oxidative or actinic light degradation.

REFERENCES:
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patent: 3904581 (1975-09-01), Murayama et al.
patent: 4097551 (1978-06-01), DiGiulio et al.
patent: 4309546 (1982-01-01), Karrer
patent: 4336183 (1982-06-01), Nakahara et al.
patent: 4356307 (1982-10-01), Kelkenberg et al.
patent: 4486570 (1984-12-01), Lordi et al.
patent: 4506056 (1985-03-01), Gaylord
patent: 4569997 (1986-02-01), Karrer
Kirk-Othmer Encyclopedia of Chemical Technology, vol. 23, pp. 615-627.
Polymerization Mechanisms and Processes, vol. 18, pp. 720-744.

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