Patent US4444950A successfully refreshed from Google Patents.
US4444950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic resin composition
Assignee: Sumika Polycarbonate Ltd
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Filing: 1983-03-01
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Granted: 1984-04-24
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Expires: 2003-03-01
Abstract
Abstract A thermoplastic resin composition improved in weld strength which comprises (A) a polycarbonate resin and (B) a rubber modified copolymer with (C) an epoxy group-containing olefin copolymer.
Inventors
- 👤 Hajime Sakano
- 👤 Akitoshi Ito
- 👤 Motoichi Yano
- 👤 Yasuhiro Honda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:45
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08L69/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
A thermoplastic resin composition having improved weld strength which comprises a blend of (A) a polycarbonate resin and (B) a rubber modified copolymer prepared by polymerizing at least two kinds of monomers chosen from the group consisting of aromatic vinyl compounds, vinyl cyanides and alkyl esters of unsaturated carboxylic acids in the presence of a rubber, with (C) an epoxy group-containing olefin copolymer comprising a copolymer of at least one unsaturated epoxy compound and at least one olefin, wherein (B) comprises (b-1) a graft copolymer comprising units of the monomers and units of the rubber and (b-2) a copolymer comprising units of the monomers, and wherein the content of (b-1) is at least 10% by weight.
Claim 2
Dependent Claim
116 words
A thermoplastic resin composition having improved weld strength which comprises a blend of (A) a polycarbonate resin and (B) a rubber modified copolymer prepared by polymerizing at least two kinds of monomers chosen from the group consisting of aromatic vinyl compounds, vinyl cyanides and alkyl esters of unsaturated carboxylic acids in the presence of a rubber, with (C) an epoxy group-containing olefin copolymer comprising a copolymer of at least one unsaturated epoxy compound and at least one olefin, wherein (B) comprises (b-1) a graft copolymer comprising units of the monomers and units of the rubber and (b-2) a copolymer comprising units of the monomers, and wherein the content of (b-1) is at least 10% by weight.
Claim 3
Dependent Claim
62 words
The composition according to claim 1, wherein the rubber modified copolymer (B) comprises a copolymer obtained by polymerizing at least two kinds of monomers chosen from the group consisting of aromatic vinyl compounds, vinyl cyanides and alkyl esters of unsaturated carboxylic acids in the presence of at least one rubber chosen from the group consisting of conjugated diene rubbers and ethylene--propylene rubbers.
Claim 4
Dependent Claim
26 words
The composition according to claim 1, wherein the weight proportion of the polycarbonate resin (A) and the rubber modified copolymer (B) is from 10:90 to 90:10.
Claim 5
Dependent Claim
32 words
The composition according to claim 1, wherein the amount of the epoxy group-containing olefin copolymer (C) is from 0.1 to 40 parts by weight to 100 parts by weight of the composition.
Claim 6
Dependent Claim
32 words
The composition according to claim 1, wherein the amount of the epoxy group-containing olefin copolymer (C) is from 0.5 to 10 parts by weight to 100 parts by weight of the composition.
Claim 7
Dependent Claim
32 words
The composition according to claim 3, wherein the amount of the epoxy group-containing olefin copolymer (C) is from 0.1 to 40 parts by weight to 100 parts by weight of the composition.
Claim 8
Dependent Claim
16 words
The composition as in claim 6 wherein (b-1) and (b-2) are separately formed and combined together.
References Cited (Backward Citations)
US3891719A
Cited
US3954905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |