The B. F. Goodrich Company

Geoffrey A Lindsay

Paul T Stricharczuk

Thermoplastic compositions are disclosed which contain, as principle ingredients, a relatively rigid polymer, such as polyvinyl chloride and/or chlorinated polyvinyl chloride and an EPM and/or an EPDM type elastomer. In addition to the above components, the composition can have incorporated therein a phase compatibility promotion agent, such as chlorinated polyethylene or poly(ethylene-co-vinyl acetate), or mixtures thereof. This phase compatibility promotion agent helps insure more uniform distribution of the elastomer throughout the relatively rigid polymer and improved cohesion of the resultant composition. Also disclosed are methods for enhancement in the compatibility of relatively rigid polymers and elastomers through the use of such phase compatibility promotion agents.

Polymer compositions and a method for enhancement in phase compatibility

Polymer blends of (1) high molecular weight ethylene-propylene (EP) copolymers having a high methylene run index with (2) low density polyethylenes are prepared by physically mixing the polymer components under conditions of heat and shear. The resultant blends are thermoplastic in nature and readily moldable and remoldable. The blends exhibit exceptionally high tensile strength without the use of curing or crosslinking agents. Products made from the polymer blends include liners and molded products such as tubing, toys, and household and automotive items.

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Hudson, OH, United States of America

Geoffrey A Lindsay