Graft polymers based on ethylene/α-olefin rubbers and...

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

Reexamination Certificate

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Details

C525S230000, C525S233000, C525S234000, C525S238000, C525S242000, C525S316000, C525S329100

Reexamination Certificate

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07060751

ABSTRACT:
A thermoplastic molding composition comprising a graft polymer is disclosed. The graft polymer contains:a) a continuous phase containing the polymerized product of at least one vinylaromatic monomer and at least one ethylenically unsaturated nitrile monomer, andb) a disperse phase containing ethylene/α-olefin rubber that is grafted with the polymerization product of at least one vinylaromatic monomer and at least one ethylenically unsaturated nitrile monomer.The weight average molecular weight of the continuous phase is 130,000 to 275,000 g/mole and the disperse phase is characterized in that its, weight average particle size is less than 0.90 μm. The molding composition is characterized in improved resistance to weathering.

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