Patent US4246381A successfully refreshed from Google Patents.
US4246381A
Expired / Lapsed
US
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Polyarylate blends with copolyesters
Assignee: BP Corp North America Inc
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Filing: 1979-06-18
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Granted: 1981-01-20
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Expires: 1999-06-18
Abstract
Abstract Described herein are blends of polyarylates derived from a dihydric phenol and an aromatic dicarboxylic acid and a copolyester derived from a cyclohexanedimethanol, an alkylene glycol and an aromatic dicarboxylic acid. These blends have improved processability, weatherability and impact properties.
Inventors
- 👤 Lloyd M. Robeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L67/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
69 words
A thermoplastic molding composition comprising in admixture: (a) from about 2 to about 85 weight percent of a polyarylate derived from a dihydric phenol and an aromatic dicarboxylic acid; and (b) from about 15 to about 98 weight percent of a copolyester derived from a cyclohexanedimethanol, an alkylene glycol and an aromatic dicarboxylic acid, said copolyester having an intrinsinc viscosity of at least about 0.4 to about 2.0 dl/g.
Claim 2
Dependent Claim
69 words
A thermoplastic molding composition comprising in admixture: (a) from about 2 to about 85 weight percent of a polyarylate derived from a dihydric phenol and an aromatic dicarboxylic acid; and (b) from about 15 to about 98 weight percent of a copolyester derived from a cyclohexanedimethanol, an alkylene glycol and an aromatic dicarboxylic acid, said copolyester having an intrinsinc viscosity of at least about 0.4 to about 2.0 dl/g.
Claim 3
Dependent Claim
86 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: ##STR5## 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 cycloalkylene radicals having up to and including 9 carbon atoms, and a dicarboxylic acid.
Claim 4
Dependent Claim
49 words
A composition as defined in claim 2 wherein the dihydric phenol is used in combination with a dihydric phenol of the following formula: ##STR6## 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 15 to about 80 weight percent.
Claim 9
Dependent Claim
90 words
A composition as defined in claim 1 wherein the copolyester has repeating units of the following formula: ##STR7## wherein the cyclohexane ring is selected from the group consisting of the cis- and trans-isomers thereof, R represents an aryl radical containing from 6 to 20 carbon atoms which is the decarboxylated residue derived from an aromatic dicarboxylic acid, n is an integer of 2 to 4, x units comprise from about 10 to about 90 percent by weight and y units comprise from about 10 to about 90 percent by weight.
Claim 10
Dependent Claim
18 words
A composition as defined in claim 8 wherein the copolyester has repeating units of the following formula: ##STR8##
Claim 11
Dependent Claim
23 words
A composition as defined in claim 1 wherein the copolyester is present in amounts of from about 20 to about 85 weight percent.
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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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |