US4377647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blend composition
Assignee: Kraton Polymers US LLC
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Filing: 1981-11-16
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Granted: 1983-03-22
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Expires: 2001-11-16
Abstract
Abstract A thermoplastic molding composition having good low temperature properties in addition to low distortion at paint bake temperatures comprises the blend of a selectively hydrogenated monoalkenyl arene-conjugated diene block copolymer, a vinyl aromatic-α, β-unsaturated cyclic anhydride copolymer, and a thermoplastic polyester.
Inventors
- 👤 Daniel P. Durbin
- 👤 Richard L. Danforth
- 👤 Robert G. Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:19
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; C08L35/00; C08L35/06; C08L67/00; C08L67/02; Y; Y10; Y10S; Y10S525/00; Y10S525/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
A thermoplastic molding composition comprising: (a) from about 10 to about 85 percent by weight of a selectively hydrogenated block copolymer comprising at least two monoalkenyl arene polymer end blocks A and at least one substantially completely hydrogenated conjugated diene polymer mid block B, the weight percent of blocks A comprising between 8 and 65 percent by weight of said block copolymer wherein at least 80% of the aliphatic double bonds in block B are hydrogenated and no more than about 25% of the alkenyl aromatic double bonds in blocks A are hydrogenated; (b) from about 10 to about 80 percent by weight of a vinyl aromatic copolymer comprising a vinyl aromatic compound and an α, β-unsaturated cyclic anhydride; and (c) from about 10 to about 80 percent by weight of a thermoplastic polyester having a molecular weight in excess of about 20,000, a melting point over about 120° C., and which polyester is selected from the group consisting of a condensation product of a dicarboxylic acid and a glycol, polypivalolactone and polycaprolactone.
Claim 2
Dependent Claim
173 words
A thermoplastic molding composition comprising: (a) from about 10 to about 85 percent by weight of a selectively hydrogenated block copolymer comprising at least two monoalkenyl arene polymer end blocks A and at least one substantially completely hydrogenated conjugated diene polymer mid block B, the weight percent of blocks A comprising between 8 and 65 percent by weight of said block copolymer wherein at least 80% of the aliphatic double bonds in block B are hydrogenated and no more than about 25% of the alkenyl aromatic double bonds in blocks A are hydrogenated; (b) from about 10 to about 80 percent by weight of a vinyl aromatic copolymer comprising a vinyl aromatic compound and an α, β-unsaturated cyclic anhydride; and (c) from about 10 to about 80 percent by weight of a thermoplastic polyester having a molecular weight in excess of about 20,000, a melting point over about 120° C., and which polyester is selected from the group consisting of a condensation product of a dicarboxylic acid and a glycol, polypivalolactone and polycaprolactone.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein said selectively hydrogenated block copolymer is a linear ABA block copolymer.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein said selectively hydrogenated block copolymer is a radial (AB) x BA block copolymer.
Claim 5
Dependent Claim
18 words
The composition of claim 1 or claim 2 wherein said vinyl aromatic copolymer is a styrene-maleic anhydride copolymer.
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein said thermoplastic polyester is prepared by condensing a dicarboxylic acid with a glycol.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein said thermoplastic polyester is poly(butylene terephthalate).
Claim 8
Dependent Claim
12 words
The composition of claim 4 wherein said thermoplastic polyester is poly(butylene terephthalate).
Claim 9
Dependent Claim
19 words
The composition according to claim 1 also containing 0 to 30 percent by weight of a hydrocarbon extending oil.
Claim 10
Dependent Claim
57 words
The composition according to claim 8 wherein the relative amounts of each component are: (a) about 30 to about 70 weight percent block copolymer, (b) about 15 to about 40 weight percent vinyl aromatic copolymer, (c) about 15 to about 40 weight percent thermoplastic polyester, and (d) about 1 to about 10 weight percent hydrocarbon extending oil.
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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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |