Impact modified polycarbonates
AssigneeMobay Chemical Corporation
InventorMark W. Witman
Life of this patent
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Abstract
Polycarbonates having improved impact performance are provided, comprising a blend of polycarbonate resin and an acrylic rubber interpolymer composite.
Claims9
A composition comprising a blend of about 80 to 99 percent by weight of an aromatic polycarbonate thermoplastic resin and about 1 to 20 percent by weight of a multiphase composite interpolymer comprising:
- (a) about 25 to 95 percent by weight of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8 percent by weight C.sub.1 to C.sub.6 acrylate, 0.1 to 5 percent by weight cross-linking member, 0.1 to 5 percent by weight graft-linking monomer, and
- (b) about 75 to 5 percent of a second rigid thermoplastic phase polymerized in the presence of said elastomeric phase,
- said composition characterized in the absence of impact modifiers selected from the group consisting of acrylate copolymers, polyolefins, butadiene-styrene copolymers, organic silicone compounds, styrene/butadiene/caprolactone block copolymers and olefin-acrylate copolymers and further in the absence of spherical particulates of alumino-silicate glass therefrom.
A composition comprising a blend of about 85 to about 94.5 phr of an aromatic polycarbonate resin and about 5.5 to about 15 phr of a multiphase composite interpolymer comprising:
- (a) about 25 to 95 percent by weight of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8 percent by weight C.sub.1 to C.sub.6 acrylate, 0.1 to 5 percent by weight cross-linking member, 0.1 to 5 percent by weight graft-linking monomer, and
- (b) about 75 to 5 percent of a second rigid thermoplastic phase polymerized in the presence of said elastomeric phase.
A composition comprising a blend of about 85 to about 95.0 phr of an aromatic polycarbonate resin and about 5.0 to about 15 phr of a multiphase composite interpolymer comprising:
- (a) about 25 to 95 percent by weight of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8 percent by weight C.sub.1 -C.sub.6 acrylate, 0.1 to 5 percent by weight cross-linking member, 0.1 to 5 percent by weight graft-linking monomer, and
- (b) about 75 to 5 percent of a second rigid thermoplastic phase polymerized in the presence of said elastomeric phase.
Dependencies are inferred from the claim text.