Mixture composition of synthetic resin and rubber
AssigneeNippon Zeon Co., Ltd.
InventorYoshinori Fujii
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Abstract
The present invention is directed to a polymer blend having improved properties comprising: (A) 90 to 10% by weight of a thermoplastic or thermosetting resin; and (B) 10 to 90% by weight of a shear-treated rubber obtained by subjecting a nitrile group-containing highly saturated copolymer rubber to a high-shear treatment in the presence of an anti-oxidant so as to lower the Mooney viscosity of the copolymer rubber by 15 units or more, said shear-treated rubber having a Mooney viscosity of 5 to 135, a molecular weight distribution (Mw/Mn) of 3.0 to 5.0 and a storage stability characterized by that the incremental increase in the Mooney viscosity of said shear-treated rubber during a 30 day storage under an ambient condition in air is not more than 10 units.
Claims9
A mixture composition comprising:
- (A) 90 to 10% by weight of a thermoplastic or thermosetting resin;
- and
- (B) 10 to 90% by weight of a rubber obtained by subjecting a nitrile group-containing highly saturated copolymer rubber to a high-shear treatment in the presence of an anti-oxidant so as to lower the Mooney viscosity of the copolymer rubber by 15 units or more, having a Mooney viscosity of 5 to 135, a molecular weight distribution (Mw/Mn) of 3.0 to 5.0 and a increase 10 units or less in the Mooney viscosity of said rubber in 30 days storage in air under room temperature after lowering Mooney viscosity.
Dependencies are inferred from the claim text.