Polyvinyl chloride resin composition

Details Polyvinyl chloride resin composition Polyvinyl chloride resin composition

1989-09-13

1990-11-20

Seccuro, Carman J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524178, 525 57, 525 59, C08K 536, C08K 537, C08L 2904, C08L 2706

Patent

active

049720120

ABSTRACT:
The polyvinyl chloride (PVC) resin-based composition of the invention gives a molded article which suffers little from the disadvantageous phenomenon of surface whitening as is sometimes unavoidable when a conventional PVC resin-made article is prolongedly kept under adverse conditions as in hot water or in a high-temperature, high-humidity atmosphere. The composition characteristically comprises a limited amount of a partially saponified polyvinyl alcohol having an average degree of polymerization of 150 to 600 and a degree of saponification of 20 to 55% as a special additive in an amount of 0.8 to 5.0% by weight based on the PVC resin. The resin composition is also less subject to the disadvantage of a decrease in the transparency of the resin articles even when the resin composition is compounded with a metal-containing heat stabilizer such as organotin mercaptides.

REFERENCES:
patent: 2914506 (1959-11-01), Mack et al.
patent: 4258163 (1981-03-01), Mariasi et al.

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