Blends of polypropylene and elastic alpha-olefin/cycle...

C - Chemistry – Metallurgy – 08 – L

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Details

C08L 23/10 (2006.01) C08L 23/08 (2006.01) C08L 23/12 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2202403

Blends of semi-crystalline polymers with rubbery thermoplastic copolymers are provided. The rubbery thermoplastic copolymers are elastic at temperatures above their Tg's and properties similar to thermoplastic elastomers and surface tensions 5 dynes/cm or more different, preferably greater than the surface tension of the semi-crystalline polymer. Improved properties include good elastic recovery, toughness, and high elasticity without significant loss in optical properties.

Cette invention se rapporte à des mélanges de polymères semi-cristallins avec des copolymères thermoplastiques caoutchouteux. Les copolymères thermoplastiques caoutchouteux sont élastiques à des températures supérieures à leur température de transition vitreuse (Tg), et leurs propriétés sont similaires aux élastomères thermoplastiques, les tensions de surface étant de préférence supérieures de 5 dynes/cm ou plus à la tension de surface du polymère semi-cristallin. Ces copolymères présentent de meilleures propriétés, telles qu'une bonne reprise élastique et une bonne résistance, ainsi qu'une haute élasticité sans perte importante de leurs propriétés optiques.

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