Patent US4378449A successfully refreshed from Google Patents.
US4378449A
Expired / Lapsed
US
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Impact modified polycarbonates
Assignee: Bayer Corp
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Filing: 1981-09-21
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Granted: 1983-03-29
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Expires: 2001-09-21
Abstract
Abstract Polycarbonates having improved impact performance are provided, comprising a blend of polycarbonate resin and an acrylic rubber interpolymer composite.
Inventors
- 👤 Mark W. Witman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:52
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
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 1 to C 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.
Claim 2
Dependent Claim
143 words
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 1 to C 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.
Claim 3
Dependent Claim
15 words
The composition of claim 1 characterized in the absence of any other impact modifier therefrom.
Claim 4
Dependent Claim
33 words
The composition of claim 1 or 2 wherein said blend is of about 85 to about 94.5 phr of said resin and about 5.5 to about 15 phr of said multiphase composite interpolymer.
Claim 5
Dependent Claim
26 words
The composition of claim 1 or 2 wherein said second rigid thermoplastic phase is at least 50 weight percent C 1 to C 4 alkyl methacrylate.
Claim 6
Dependent Claim
99 words
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 1 to C 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.
Claim 7
Dependent Claim
99 words
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 1 to C 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.
Claim 8
Dependent Claim
59 words
The composition of claim 1 or 2 or 5 wherein weight ratios of said C 1 to C 6 acrylate to said cross-linking member, to said graft-linking monomer and to said second rigid thermoplastic phase is 79.2/0.4/0.4/20.0 wherein said cross-linking member is 1.3 butylene-diacrylate, said graft-linking monomer is diallyl maleate and said second rigid thermoplastic phase is methyl methacrylate.
Claim 9
Dependent Claim
21 words
A process for improving the impact performance of polycarbonate resins comprising blending therewith the multiphase composite interpolymer defined in claim 1.
Claim 10
Dependent Claim
11 words
The composition of claim 6 wherein said acrylate is n-butyl acrylate.
Claim 11
Dependent Claim
98 words
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 1 -C 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.
Claim 12
Dependent Claim
98 words
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 1 -C 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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |