Multipurpose polymer bound stabilizers

Details Multipurpose polymer bound stabilizers Multipurpose polymer bound 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

049819151

ABSTRACT:
Polymer bound stabilizer compounds are provided in which two or more different classes of stabilizers are chemically bound to anhydride containing polymers or copolymers. Polymeric stabilizers are prepared by the reaction of primary amino or hydrazido substituted stabilizers (i.e., antioxidants, light stabilizers, etc.) 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 temperatures. The polymer bound stabilizer compounds may be used as concentrates to stabilize other polymer systems.

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