Polymer bound UV stabilizers

Details Polymer bound UV stabilizers Polymer bound UV stabilizers

1989-06-23

1991-01-01

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...

5253275, 5253296, 525343, 525375, 525379, 525380, 525381, 525382, C08F 832

Patent

active

049819143

ABSTRACT:
Ultraviolet light stabilizers are chemically bound to anhydride containing polymers or copolymers. Polymeric stabilizers are prepared by the reaction of primary amino or hydrazido-substituted UV absorbers with some or all of the anhydride groups of the polymer or copolymer to form pendant stabilizer substituted imide or amic acid groups. The polymer bound stabilizers are not lost from the polymer system by volatilization, migration, or extraction, even at high temperature. The polymeric stabilizers of this invention may be used as they are or as concentrates to stabilize other polymer systems.

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