Polyol esters of zinc mercaptoacids as heat stabilizers for PVC

Details Polyol esters of zinc mercaptoacids as heat stabilizers for PVC Polyol esters of zinc mercaptoacids as heat stabilizers for PVC

1995-03-10

1996-07-16

Hoke, Veronica P.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

556130, C08K 536

Patent

active

055367674

ABSTRACT:
A zinc mercaptoacid ester of a polyhydric alcohol or ether, carboxylate, or ether-carboxylate thereof having at least one functional hydroxy group are improved heat stabilizers for halogen-containing polymer compositions. The phenomenon known as zinc burn during processing of such compositions is eliminated. Zinc bis-thioglycolates, zinc mercaptopropionates and zinc bis-mercaptosuccinates of glycols, glycerol, glycol ethers, glycol carboxylates, and glycerol carboyxlates exemplify the new class of heat stabilizers.

REFERENCES:
patent: 2680726 (1954-06-01), Weinberg et al.
patent: 4287118 (1981-09-01), Muldrow
patent: 4396552 (1983-08-01), Knobloch et al.
patent: 4515916 (1985-05-01), Molt
patent: 4755549 (1988-07-01), Kemper et al.

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