In-situ polymerized blends of vinyl acetate/ethylene copolymar a

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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Other Related Categories

525239, 525244, 525302, C08L 2706, C08F 218, C08F11406, C08F11808

Type

Patent

Status

active

Patent number

051985012

Description

ABSTRACT:
A poly(vinyl chloride) product is provided containing as a permanent plasticizer, a copolymer of vinyl acetate and ethylene which is copolymerized in the presence of porous particles of the PVC. The copolymerization is carried out in either suspension or emulsion and under conditions which provide a copolymer containing 60 to 85 wt % vinyl acetate in amounts from about 20 to 60 wt % of the vinyl acetate/ethylene copolymer in the final composition. A free flowing powder is formed which can be used for PVC compounding operations. If over 60 up to 80 wt % of the composition contains the copolymer, the product is a reinforced VAE dispersion.

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