Impact strength, stress-whitening and bruise-resistance for impa

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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Details

525198, 525240, C08L 2326, C08L 2312, C08L 2316

Patent

active

054592011

ABSTRACT:
The present invention relates to a process for preparing high melt flow rate thermoplastic compositions that have improved impact and bruise-resistance properties and to the thermoplastic composition that are produced by the process of the instant invention. Specifically, the process comprises the steps of precontacting a non-crosslinked elastomeric polymeric component with a peroxide compound at a temperature below the decomposition temperature of the peroxide and below the melting point of the non-crosslinked polymeric component to produce a peroxide adsorbed polymeric component; and melt mixing the aforementioned peroxide adsorbed polymeric component with a high propylene content polymeric component selected from the group consisting of homopolymers of propylene, block copolymers of propylene and ethylene, and thermoplastic olefin polymers at a temperature above the decomposition temperature of the peroxide.

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