US3870676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized block copolymer compositions
Assignee: Shell USA Inc
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Filing: 1973-04-23
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Granted: 1975-03-11
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Expires: 1993-04-23
Abstract
Abstract Compositions are provided comprising a major proportion of block copolymers of alkenyl arenes and conjugated dienes as well as their hydrogenation products stabilized with a minor amount of a hydroxyl-containing polyepoxide.
Inventors
- 👤 Nancy J Condon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C08K5/01; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L53/00; C08L53/02; C08L65/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A BLOCK COPOLYMER COMPOSITION COMPRISING: A. 100 PARTS BY WEIGHT OF A BLOCK COPOLYMER OF THE GROUP CONSISTING OF COPOLYMERS HAVING AT LEAST ONE MONOALKENYLARENE POLYMER BLOCK HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 5,000 AND 150,000, AND AT LEAST ONE CONJUGATED DIENE POLYMER BLOCK HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 20,000 AND 500,000 AND HYDROGENATED DERIVATIVES THEREOF WHEREIN AT LEAST 95% OF THE OLEFINIC DOUBLE BONDS ARE SATURATED, THE MONOALKENYL ARENE BEING SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHARMETHYL STYRENE, RING ALKYLATED STYRENES AND MIXTURES THEREOF, AND THE CONJUGATED DIENE BEING SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE AND MIXTURES THEREOF, AND B. 0.5-5 PARTS BY WEIGHT OF A HYDROXYL-CONTAINING POLYEPOXIDE HAVING AN EPOXIDE EQUIVALENCY GREATER THAN 1.0 AND AN EPOXIDE EQUIVALENT WEIGHT OF BETWEEN ABOUT 200 AND 6,000.
Claim 2
Dependent Claim
133 words
A BLOCK COPOLYMER COMPOSITION COMPRISING: A. 100 PARTS BY WEIGHT OF A BLOCK COPOLYMER OF THE GROUP CONSISTING OF COPOLYMERS HAVING AT LEAST ONE MONOALKENYLARENE POLYMER BLOCK HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 5,000 AND 150,000, AND AT LEAST ONE CONJUGATED DIENE POLYMER BLOCK HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 20,000 AND 500,000 AND HYDROGENATED DERIVATIVES THEREOF WHEREIN AT LEAST 95% OF THE OLEFINIC DOUBLE BONDS ARE SATURATED, THE MONOALKENYL ARENE BEING SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHARMETHYL STYRENE, RING ALKYLATED STYRENES AND MIXTURES THEREOF, AND THE CONJUGATED DIENE BEING SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE AND MIXTURES THEREOF, AND B. 0.5-5 PARTS BY WEIGHT OF A HYDROXYL-CONTAINING POLYEPOXIDE HAVING AN EPOXIDE EQUIVALENCY GREATER THAN 1.0 AND AN EPOXIDE EQUIVALENT WEIGHT OF BETWEEN ABOUT 200 AND 6,000.
Claim 3
Dependent Claim
133 words
A block copolymer composition comprising: a. 100 parts by weight of a block copolymer of the group consisting of copolymers having at least one monoalkenylarene polymer block having an average molecular weight between about 5,000 and 150,000, and at least one conjugated diene polymer block having an average molecular weight between about 20,000 and 500,000 and hydrogenated derivatives thereof wherein at least 95% of the olefinic double bonds are saturated, the monoalkenyl arene being selected from the group consisting of styrene, alphamethyl styrene, ring alkylated styrenes and mixtures thereof, and the conjugated diene being selected from the group consisting of butadiene, isoprene and mixtures thereof, and b. 0.5-5 parts by weight of a hydroxyl-containing polyepoxide having an epoxide equivalency greater than 1.0 and an epoxide equivalent weight of between about 200 and 6,000.
Claim 4
Dependent Claim
133 words
A block copolymer composition comprising: a. 100 parts by weight of a block copolymer of the group consisting of copolymers having at least one monoalkenylarene polymer block having an average molecular weight between about 5,000 and 150,000, and at least one conjugated diene polymer block having an average molecular weight between about 20,000 and 500,000 and hydrogenated derivatives thereof wherein at least 95% of the olefinic double bonds are saturated, the monoalkenyl arene being selected from the group consisting of styrene, alphamethyl styrene, ring alkylated styrenes and mixtures thereof, and the conjugated diene being selected from the group consisting of butadiene, isoprene and mixtures thereof, and b. 0.5-5 parts by weight of a hydroxyl-containing polyepoxide having an epoxide equivalency greater than 1.0 and an epoxide equivalent weight of between about 200 and 6,000.
Claim 5
Dependent Claim
22 words
A composition according to claim 1 containing in addition between 10 and 100 phr based on the block copolymer, of a polypropylene.
Claim 6
Dependent Claim
22 words
A composition according to claim 1 containing in addition between 10 and 100 phr based on the block copolymer, of a polystyrene.
Claim 7
Dependent Claim
23 words
A composition according to claim 1 containing in addition between 25 and 150 phr based on the block copolymer, of a hydrocarbon oil.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |