US5149739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-reinforced thermoplastic elastomer polyurethane compositions with either modified and/or unmodified polyolefins
Assignee: Lubrizol Advanced Materials Inc
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Filing: 1991-08-26
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Granted: 1992-09-22
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Expires: 2011-08-26
Abstract
Abstract A thermoplastic elastomer polyurethane is made having improved properties such as flexural modulus, flexural strength, and improved melt processability. An unaged polyurethane containing free isocyanate groups is made in situ in a high shear blending apparatus. The unaged polyurethane is typically transferred to another high shear blending apparatus and blended with either an unmodified polyolefin and/or a carbonyl modified polyolefin along with optional but desirable fibers to produce a thermoplastic elastomer polyurethane composition.
Inventors
- 👤 Biing-Lin Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:50
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
93 words
A thermoplastic elastomer polyurethane composition, comprising: the reaction product consisting essentially of approximately 100 parts by weight of an unaged polyurethane containing free isocyanate with a modified polyolefin, in the presence of high shear of at least 600 reciprocal seconds, the amount of said modified polyolefin, being up to about 40 parts by weight, said unaged polyurethane made from a hydroxyl-terminated intermediate, a chain extender glycol, and an excess of polyisocyanate, the equivalent weight amount of said polyisocyanate to said hydroxyl-terminated intermediate and said chain extender being from about 1.01 to about 1.20.
Claim 2
Dependent Claim
93 words
A thermoplastic elastomer polyurethane composition, comprising: the reaction product consisting essentially of approximately 100 parts by weight of an unaged polyurethane containing free isocyanate with a modified polyolefin, in the presence of high shear of at least 600 reciprocal seconds, the amount of said modified polyolefin, being up to about 40 parts by weight, said unaged polyurethane made from a hydroxyl-terminated intermediate, a chain extender glycol, and an excess of polyisocyanate, the equivalent weight amount of said polyisocyanate to said hydroxyl-terminated intermediate and said chain extender being from about 1.01 to about 1.20.
Claim 3
Dependent Claim
30 words
A thermoplastic elastomer polyurethane composition according to claim 1, wherein said unaged polyurethane has a melt index of from about 1 to about 150 at 200° C. and 2,160 grams.
Claim 4
Dependent Claim
27 words
A thermoplastic elastomer polyurethane composition according to claim 2, wherein the amount of said modified polyolefin is from about 1 part to about 35 parts by weight.
Claim 5
Dependent Claim
47 words
A thermoplastic elastomer polyurethane composition according to claim 3, wherein said high shear has a shear rate of at least 750 reciprocal seconds, wherein said modified polyolefin polymer is a graft copolymer containing a polyolefin backbone and pendant carbonyl groups, or an anhydride modified ##STR5## block copolymer.
Claim 6
Dependent Claim
44 words
A thermoplastic elastomer polyurethane composition according to claim 4, wherein said melt index is from about 5 to about 30, and wherein said carbonyl group of said modified polyolefin is derived from an anhydride of carboxylic acid having from 1 to 8 carbon atoms.
Claim 7
Dependent Claim
78 words
A thermoplastic elastomer polyurethane composition according to claim 5, wherein said high shear is a shear rate of at least 1,000 reciprocal seconds, wherein the amount of said modified polyolefin, is from about 8 to about 32 parts by weight, wherein said modified polyolefin is a polypropylene backbone and said carbonyl group is derived from an anhydride having from 4 to 8 carbon atoms, and wherein said isocyanate/hydroxyl equivalent weight ratio is from about 1.01 to about 1.08.
Claim 8
Dependent Claim
34 words
A thermoplastic elastomer polyurethane composition according to claim 5, wherein said modified polyolefin is a copolymer of propylene and ethylene graft-modified with from about 0.2 to about 7 percent by weight of maleic anhydride.
Claim 9
Dependent Claim
52 words
A thermoplastic elastomer polyurethane composition according to claim 7, wherein said unaged polyurethane is made from a polyester intermediate, wherein said polyester intermediate is made from adipic acid and 1,4-butane diol, wherein said polyester intermediate has a molecular weight of from about 700 to about 4,500, and wherein said polyisocyanate is MDI.
Claim 10
Dependent Claim
18 words
A thermoplastic elastomer polyurethane composition according to claim I, including up to 50 parts by weight of fiber.
Claim 11
Dependent Claim
18 words
A thermoplastic elastomer polyurethane composition according to claim 4, including up to 50 parts by weight of fiber.
Claim 12
Dependent Claim
22 words
A thermoplastic elastomer polyurethane composition according to claim 3, including of from about 10 to about 30 parts by weight of fiber.
Claim 13
Dependent Claim
22 words
A thermoplastic elastomer polyurethane composition according to claim 6, including of from about 10 to about 30 parts by weight of fiber.
Claim 14
Dependent Claim
22 words
A thermoplastic elastomer polyurethane composition according to claim 8, including of from about 10 to about 30 parts by weight of fiber.
Claim 15
Dependent Claim
15 words
A thermoplastic elastomer polyurethane composition according to claim 12, wherein said fibers are glass fibers.
Claim 16
Dependent Claim
15 words
A thermoplastic elastomer polyurethane composition according to claim 13, wherein said fibers are glass fibers.
References Cited (Backward Citations)
US3272890A
Cited
US4342847A
Cited
US4500671A
Cited
US4423185A
Cited
US4913971A
Cited
US4883837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-22 | 1996-03-23 | 1996-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-22 | 2000-03-23 | 2000-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-22 | 2004-03-23 | 2004-09-22 | $7700.00 | Window Closed / Lapsed |