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US4041103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of certain hydrogenated block copolymers
Assignee: Shell USA Inc
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Filing: 1976-06-07
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Granted: 1977-08-09
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Expires: 1996-06-07
Abstract
Abstract Polymeric blends, covering the range from rubber-like to flexible mechanical behavior, having outstanding resistance to shrinkage and distortion on heat aging, resistance to ozone, good tensile properties, resilience, processability, as well as a combination of toughness and flexibility are comprised of certain selectively hydrogenated block copolymers and polyamide polymers.
Inventors
- 👤 Sol Davison
- 👤 William P. Gergen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:06
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L101/00; C08L53/025; C08L77/00; Y; Y10; Y10S; Y10S525/00; Y10S525/94
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
A composition comprising the admixture obtained by intimately mixing 100 parts by weight of a block copolymer and about about 5 to about 200 parts by weight of a polyamide so as to form an interpenetrating network wherein: a. said block copolymer comprises at least two monoalkenyl arene polymer end blocks A and at least one substantially completely hydrogenated conjugated diene polymer midblock B, said block copolymer having an 8 to 55 percent by weight monoalkenyl arene polymer block content, each polymer block A having an average molecular weight of between about 5,000 and about 125,000, and each polymer block B having an average molecular weight of between about 10,000 and about 300,000; and b. said polyamide has the formula: ##STR2## where a or b or c individually vary from 4 to 12 inclusive, and n is chosen so that the number average molecular weight is between about 10,000 and about 30,000.
Claim 2
Dependent Claim
152 words
A composition comprising the admixture obtained by intimately mixing 100 parts by weight of a block copolymer and about about 5 to about 200 parts by weight of a polyamide so as to form an interpenetrating network wherein: a. said block copolymer comprises at least two monoalkenyl arene polymer end blocks A and at least one substantially completely hydrogenated conjugated diene polymer midblock B, said block copolymer having an 8 to 55 percent by weight monoalkenyl arene polymer block content, each polymer block A having an average molecular weight of between about 5,000 and about 125,000, and each polymer block B having an average molecular weight of between about 10,000 and about 300,000; and b. said polyamide has the formula: ##STR2## where a or b or c individually vary from 4 to 12 inclusive, and n is chosen so that the number average molecular weight is between about 10,000 and about 30,000.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 wherein the polyamide is nylon 6,6.
Claim 4
Dependent Claim
12 words
A composition according to claim 1 wherein the polyamide is nylon 6.
Claim 5
Dependent Claim
28 words
A composition according to claim 1 wherein the monoalkenyl arene is styrene and the conjugated diene is butadiene having a 1,2 content of between about 35% and 55%.
Claim 6
Dependent Claim
20 words
A composition according to claim 1 wherein the amount of polyamide employed varies from about 10 to about 40 phr.
Claim 7
Dependent Claim
33 words
A composition according to claim 1 wherein the polyamide is selected from the group consisting of nylon 6; nylon 6,6, nylon 6,10; nylon 11; nylon 4; nylon 7; nylon 9; and mixtures thereof.
Claim 8
Dependent Claim
20 words
A composition according to claim 1 wherein the block copolymer and polyamide are intimately mixed at substantially the same viscosities.
Claim 9
Dependent Claim
22 words
A composition according to claim 1 wherein the amount of polyamide employed varies from about 5 to about 75 parts by weight.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |