US4443581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact modified polyarylate blends
Assignee: BP Corp North America Inc
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Filing: 1981-08-27
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Granted: 1984-04-17
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Expires: 2001-08-27
Abstract
Abstract Described herein are polyarylate molding compositions having improved notched izod impact values after molding, which composition comprises a blend of a polyarylate and a siloxane-polyarylene polyether block copolymer and/or a siloxane polycarbonate block copolymer.
Inventors
- 👤 Lloyd M. Robeson
- 👤 Markus Matzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L67/03
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
43 words
A thermoplastic molding composition having improved notched izod impact values after molding, said composition comprising in admixture: (a) a polyarylate derived from a dihydric phenol and an aromatic dicarboxylic acid; and (b) a siloxane-polyarylene polyether block copolymer and/or a siloxane polycarbonate block copolymer.
Claim 2
Dependent Claim
43 words
A thermoplastic molding composition having improved notched izod impact values after molding, said composition comprising in admixture: (a) a polyarylate derived from a dihydric phenol and an aromatic dicarboxylic acid; and (b) a siloxane-polyarylene polyether block copolymer and/or a siloxane polycarbonate block copolymer.
Claim 3
Dependent Claim
87 words
A composition as defined in claim 1 wherein said polyarylate is derived from a dihydric phenol or a mixture of dihydric phenols, said dihydric phenol having the following formula: ##STR26## wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, z has a value of 0 to 4, inclusive and R' is a divalent saturated aliphatic hydrocarbon radical having from 1 to 3 carbon atoms and a cycloalkylene radical having up to and including 9 carbon atoms and a dicarboxylic acid.
Claim 4
Dependent Claim
49 words
A composition of defined in claim 2 wherein the dihydric phenol is used in combination with a dihydric phenol of the following formula: ##STR27## wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine and z has a value of 0 to 4.
Claim 5
Dependent Claim
18 words
A composition as defined in claim 2 wherein the polyarylate is derived from bisphenol-A and an aromatic-dicarboxylic acid.
Claim 6
Dependent Claim
19 words
A composition as defined in claim 1 wherein the polyarylate is derived from a dihydric phenol and isophthalic acid.
Claim 7
Dependent Claim
25 words
A composition as defined in claim 1 wherein the polyarylate is derived from a dihydric phenol and a mixture of isophthalic acid and terephthalic acid.
Claim 8
Dependent Claim
23 words
A composition as defined in claim 1 wherein the polyarylate is present in amounts of from about 1 to about 99 weight percent.
Claim 9
Dependent Claim
23 words
A composition as defined in claim 7 wherein the polyarylate is present in amounts of from about 25 to about 95 weight percent.
Claim 10
Dependent Claim
18 words
A composition as defined in claim 1 wherein the siloxane-polyarylene polyether block copolymer is a poly(dimethylsiloxane)-polysulfone block copolymer.
Claim 11
Dependent Claim
19 words
A composition as defined in claim 1 wherein the siloxane-polycarbonate block copolymer is a poly(dimethylsiloxane)-bisphenol A polycarbonate block copolymer.
Claim 12
Dependent Claim
31 words
A composition as defined in claim 1 wherein the siloxane-polyarylene polyether block copolymers and/or siloxane polycarbonate block copolymer is present in amounts of from about 1 to about 25 weight percent.
Claim 13
Dependent Claim
11 words
A composition as defined in claim 1 which contains a polyester.
Claim 14
Dependent Claim
41 words
A composition as defined in claim 12 wherein said polyester is derived from an aliphatic diol and an aromatic dicarboxylic acid and has repeating units of the general formula: ##STR28## wherein n is a whole number of from 2 to 4.
Claim 15
Dependent Claim
15 words
A composition as defined in claims 12 or 13 wherein the polyester is poly(ethylene terephthalate).
Claim 16
Dependent Claim
13 words
A composition as defined in claim 12, wherein the polyester is poly(1,4-cyclohexanedimethanol tere/isophthalate).
Claim 17
Dependent Claim
20 words
A composition as defined in claim 12, wherein the polyester is a copolyester of 1,4-cyclohexanedimethanol, ethylene glycol and terephthalic acid.
Claim 18
Dependent Claim
23 words
A composition as defined in claim 12 wherein the polyester is present in amounts of from about 5 to about 80 weight percent.
Claim 19
Dependent Claim
23 words
A composition as defined in claims 17 wherein the polyester is present in amounts of from about 10 to about 60 weight percent.
Claim 20
Dependent Claim
50 words
A composition as defined in claims 1 or 12 which contains one or more thermoplastic polymers selected from the group consisting of an aromatic polycarbonate, a styrene resin, an alkyl acrylate resin, a polyurethane, a vinyl chloride polymer, a poly(aryl ether), a copolyetherester block copolymer, a polyhydroxyether, or a polyamide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |