Thermoplastic blends of 1-olefin polymers with styrene...

Details Thermoplastic blends of 1-olefin polymers with styrene... Thermoplastic blends of 1-olefin polymers with styrene...

C - Chemistry, Metallurgy

08

L

400/4912

C08L 9/06 (2006.01)

Patent

CA 1147886

ABSTRACT OF THE DISCLOSURE: Thermoplastic elastomer blends of 1-olefin polymers and copolymers such as polypropylene with styrene-butadiene rubber have good physical properties such as a low brittle point, good low temperature impact resistance, minimum creep at high temperatures and good elongation. The blends can be repeatedly processed and yet maintain their good physical properties. The amount of the 1-olefin polymer or copolymer based upon the weight of the blend ranges from about 15 percent to about 48 percent with the amount of the styrene-butadiene rubber correspondingly ranging from about 85 percent to about 52 percent. The blend is mixed at a temperature at or above the melting point of the 1-olefin polymer or copolymer with two phases produced which are generally continuous. The blends which may be partially cured have excellent and un- expected ozone resistance and aging properties, as well as excellent paint adhesion.

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