US4096203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process to control cohesive strength of block copolymer composition
Assignee: Shell USA Inc
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Filing: 1976-07-30
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Granted: 1978-06-20
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Expires: 1996-07-30
Abstract
Abstract The cohesive strength of a monoalkenyl arene-diene block copolymer adhesive composition containing as a minimum block copolymer and tackifying resin components is controlled by varying the coupling efficiency of the block copolymer polymerization process.
Inventors
- 👤 David J. St. Clair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C08; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
147 words
An adhesive composition which fails cohesively at ambient temperatures comprising as a minimum a block copolymer component and a tackifying resin component, wherein said block copolymer component is prepared by the process comprising: (a) reacting an organomonolithium compound with a monoalkenyl arene in the presence of an inert diluent, said organomonolithium compound having the structure RLi where R contains from 2 to 20 carbon atoms per molecule and is an aliphatic radical, cycloaliphatic radical, aromatic radical, or combination thereof; (b) reacting the product mixture from step (a) with a conjugated diene having 4 to 5 carbon atoms per molecule; and (c) reacting the product mixture from step (b) with a coupling agent in such an amount and under such conditions as to vary the coupling efficiency of the process within the range of about 20% to about 80% therein controlling the cohesive strength of the adhesive composition.
Claim 2
Dependent Claim
147 words
An adhesive composition which fails cohesively at ambient temperatures comprising as a minimum a block copolymer component and a tackifying resin component, wherein said block copolymer component is prepared by the process comprising: (a) reacting an organomonolithium compound with a monoalkenyl arene in the presence of an inert diluent, said organomonolithium compound having the structure RLi where R contains from 2 to 20 carbon atoms per molecule and is an aliphatic radical, cycloaliphatic radical, aromatic radical, or combination thereof; (b) reacting the product mixture from step (a) with a conjugated diene having 4 to 5 carbon atoms per molecule; and (c) reacting the product mixture from step (b) with a coupling agent in such an amount and under such conditions as to vary the coupling efficiency of the process within the range of about 20% to about 80% therein controlling the cohesive strength of the adhesive composition.
Claim 3
Dependent Claim
26 words
A composition according to claim 1 wherein said monoalkenyl arene is styrene and said conjugated diene is selected from the group consisting of isoprene and butadiene.
Claim 4
Dependent Claim
18 words
A composition according to claim 2 wherein said diene is isoprene and said coupling efficiency is about 50%.
Claim 5
Dependent Claim
22 words
A composition according to claim 1 wherein said adhesive composition comprises said block copolymer, said tackifying resin, and a rubber extending oil.
Claim 6
Dependent Claim
24 words
A composition according to claim 4 wherein said monoalkenyl arene is styrene, said conjugated diene is isoprene, and said coupling efficiency is about 67.5%.
Claim 7
Dependent Claim
13 words
A composition according to claim 2 wherein said organomonolithium compound is sec-butyl lithium.
Claim 8
Dependent Claim
14 words
A composition according to claim 6 wherein said coupling agent is selected from polyhalides.
Claim 9
Dependent Claim
12 words
A composition according to claim 6 wherein said coupling agent is dibromoethane.
Claim 10
Dependent Claim
17 words
A composition according to claim 1 wherein the coupling efficiency varies from about 30% to about 70%.
Claim 11
Dependent Claim
137 words
An adhesive composition comprising a block copolymer component and a tackifying resin component, wherein said block copolymer is recovered from the process comprising: (a) reacting an organomonolithium compound with a monoalkenyl arene in the presence of an inert diluent, said organomonolithium compound having the structure RLi where R contains from 2 to 20 carbon atoms per molecule and is an aliphatic radical, cycloaliphatic radical, aromatic radical, or combination thereof; (b) reacting the product mixture from step (a) with a conjugated diene having 4 to 5 carbon atoms per molecule; and (c) reacting the product mixture from step (b) with a coupling agent in such an amount and under such conditions as to vary the coupling efficiency of the process within the range of about 20% to about 80% therein controlling the cohesive strength of the adhesive composition.
Claim 12
Dependent Claim
137 words
An adhesive composition comprising a block copolymer component and a tackifying resin component, wherein said block copolymer is recovered from the process comprising: (a) reacting an organomonolithium compound with a monoalkenyl arene in the presence of an inert diluent, said organomonolithium compound having the structure RLi where R contains from 2 to 20 carbon atoms per molecule and is an aliphatic radical, cycloaliphatic radical, aromatic radical, or combination thereof; (b) reacting the product mixture from step (a) with a conjugated diene having 4 to 5 carbon atoms per molecule; and (c) reacting the product mixture from step (b) with a coupling agent in such an amount and under such conditions as to vary the coupling efficiency of the process within the range of about 20% to about 80% therein controlling the cohesive strength of the adhesive composition.
Claim 13
Dependent Claim
16 words
An adhesive composition according to claim 10 wherein the adhesive composition also contains an extending oil.
Claim 14
Dependent Claim
21 words
An adhesive composition according to claim 10 wherein the adhesive composition also contains an extending oil, arene-block-compatible resin, and a stabilizer.
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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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |