Patent US5107337A successfully refreshed from Google Patents.
Patent US4481330A successfully refreshed from Google Patents.
US4481330A
Expired / Lapsed
US
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Polycarbonate resin composition
Assignee: Teijin Ltd
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Filing: 1982-12-07
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Granted: 1984-11-06
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Expires: 2002-12-07
Abstract
Abstract A polycarbonate resin composition comprising (A) 20 to 90% by weight of a polycarbonate resin, (B) 5 to 70% by weight of an aromatic polyester resin, (C) 1 to 15% by weight of an isobutylene copolymer rubber composed of a major proportion of isobutylene and a minor proportion of isoprene, (D) 1 to 20% by weight of an elastomeric acrylic graft copolymer resin composed of, as a trunk polymer, a crosslinked acrylic copolymer containing not less than 3% by weight of butadiene as a comonomer and being free from ethylene and grafted thereto, at least one grafting monomer selected from the group consisting of styrene, alkyl acrylates and alkyl methacrylates, and (E) 0 to 15% by weight of an olefin resin derived from an olefin having 2 to 6 carbon atoms; wherein the weight ratio of [resin (A)+resin (B)]/[rubber (C)+resin (D)] is from 2 to 20, and if the resin (E) is present, the weight ratio of resin (B)/[rubber (C)+resin (D)+resin (E)] is from 1 to 5.
Inventors
- 👤 Osamu Ohara
- 👤 Kazuo Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:28
CPC Classifications
C; C08; C08L; C08L67/00; C08L69/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
167 words
A polycarbonate resin composition comprising (A) 20 to 90% by weight of a polycarbonate resin, (B) 5 to 70% by weight of an aromatic polyester resin, (C) 1 to 15% by weight of an isobutylene copolymer rubber composed of a major proportion of isobutylene and a minor proportion of isoprene, (D) 1 to 20% by weight of an elastomeric acrylic graft copolymer resin composed of, as a trunk polymer, a crosslinked acrylic copolymer containing not less than 3% by weight of butadiene as a comonomer and being free from ethylene and grafted thereto, at least one grafting monomer selected from the group consisting of styrene, alkyl acrylates and alkyl methacrylates, and (E) 0 to 15% by weight of an olefin resin derived from an olefin having 2 to 6 carbon atoms; wherein the weight ratio of [resin (A)+resin (B)]/[rubber (C)+resin (D)] is from 2 to 20, and when the resin (E) is present, the weight ratio of resin (B)/[rubber (C)+resin (D)+resin (E)] is from 1 to 5.
Claim 2
Dependent Claim
167 words
A polycarbonate resin composition comprising (A) 20 to 90% by weight of a polycarbonate resin, (B) 5 to 70% by weight of an aromatic polyester resin, (C) 1 to 15% by weight of an isobutylene copolymer rubber composed of a major proportion of isobutylene and a minor proportion of isoprene, (D) 1 to 20% by weight of an elastomeric acrylic graft copolymer resin composed of, as a trunk polymer, a crosslinked acrylic copolymer containing not less than 3% by weight of butadiene as a comonomer and being free from ethylene and grafted thereto, at least one grafting monomer selected from the group consisting of styrene, alkyl acrylates and alkyl methacrylates, and (E) 0 to 15% by weight of an olefin resin derived from an olefin having 2 to 6 carbon atoms; wherein the weight ratio of [resin (A)+resin (B)]/[rubber (C)+resin (D)] is from 2 to 20, and when the resin (E) is present, the weight ratio of resin (B)/[rubber (C)+resin (D)+resin (E)] is from 1 to 5.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the polycarbonate resin (A) is a polycarbonate derived from a dihydric phenol component consisting mainly of 2,2-bis(4-hydroxyphenyl)propane.
Claim 4
Dependent Claim
40 words
The composition of claim 1 wherein the aromatic polyester resin is a polyester derived from an alkylene glycol with 2 to 10 carbon atoms and an aromatic dicarboxylic acid with 8 to 12 carbon atoms or an ester-forming derivative thereof.
Claim 5
Dependent Claim
94 words
The composition of claim 1 wherein the trunk polymer of the acrylic copolymer (D) is a polymer having an average particle diameter of 0.13 to 0.20 micron and derived from 35 to 60 parts by weight of an alkyl acrylate having 2 to 12 carbon atoms in the alkyl group, 5 to 20 parts by weight of butadiene, an alkyl methacrylate having 1 to 4 carbon atoms in the alkyl group and 0.6 to 1.3 parts by weight of a crosslinking agent, and the grafting monomer is a mixture of styrene and methyl methacrylate.
Claim 6
Dependent Claim
32 words
The composition of claim 1 wherein the isobutylene copolymer rubber (C) is a copolymer rubber composed of 93 to 99% by weight of isobutylene and 7 to 1% by weight of isoprene.
Claim 7
Dependent Claim
21 words
The composition of claim 1 wherein the resin (E) is present in an amount of from 1 to 10% by weight.
Claim 8
Dependent Claim
15 words
The composition of claim 6 wherein the olefin resin (E) is polyethylene, polypropylene or poly(4-methylpentene-1).
Claim 9
Dependent Claim
62 words
The composition of claim 1 comprising: (A) 40 to 80% by weight of said polycarbonate resin; (B) 10 to 45% by weight of said aromatic polyester resin; (C) 2 to 12% by weight of said isobutylene copolymer rubber; (D) 3 to 15% by weight of said elastomeric acrylic graft copolymer resin; and (E) 0 to 10% by weight of said olefin resin.
Claim 10
Dependent Claim
22 words
The composition of claim 8 wherein the olefin resin (E) is present in an amount of from 1 to 10% by weight.
Claim 11
Dependent Claim
146 words
The composition of claim 1 wherein said composition has a melt flow rate of about 10 to 15 g/10 min, a flexural modulus of about 18×10 3 to 22×10 3 kgf/cm 2 , a relative flexural strength in high-octane gasoline of about 65 to 80, a relative flexural strength in carbon tetrachloride of about 70 to 90, absence of cracking in a bolt clamping test in high-octane gasoline, carbon tetrachloride or methylisobutyl ketone, a releasability of not more than about 100 kg in a mold releasability test, an Izod impact strength of at least about 23 kgf.cm/cm for a sample having a thickness of 3.18 mm in an impact resistance test at -10° C. and a heat aging resistance of at least about 45 kgf.cm/cm in an impact heat aging test at 125° C. for 65 hours for a sample having a thickness of 3.18 mm.
Claim 12
Dependent Claim
16 words
The composition of claim 1 in which the proportion of the olefin resin (E) is 0.
Claim 13
Dependent Claim
16 words
The composition of claim 8 in which the proportion of the olefin resin (E) is 0.
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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) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |