US4444953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assymetric block copolymers and corresponding adhesive formulations
Assignee: Shell USA Inc
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Filing: 1983-04-18
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Granted: 1984-04-24
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Expires: 2003-04-18
Abstract
Abstract A novel block copolymer having particular utility in adhesive compositions has the structure (A-B) x Y(C) z where A is a poly(monoalkenyl) block, B and C are poly(conjugated diene) polymer blocks, Y is the residue of a multifunctional coupling agent, and x plus z is greater than 6. Also disclosed are adhesive compositions containing such block copolymers.
Inventors
- 👤 David J. St. Clair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022; C08F; C08F297/00; C08F297/02; C08F297/04; C08F297/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
An adhesive composition comprising a block copolymer having the star-shaped, asymmetrical structure (A--B).sub.x Y(C).sub.z where A is a polymer block of a monoalkenyl arene, B is a polymer block of a conjugated diene, C is a polymer block of a conjugated diene, Y is the residue of a multifunctional coupling agent, the sum of x plus z is greater than 6 and less than about 25, the ratio of x is z is between about 5 to 1 and about 1 to 5, the molecular weight of each block A is between about 3,000 and about 30,000, the molecular weight of each block B is between about 15,000 and about 100,000, and the molecular weight of each block C is between about 15,000 and about 100,000 and a tackifying resin.
Claim 2
Dependent Claim
130 words
An adhesive composition comprising a block copolymer having the star-shaped, asymmetrical structure (A--B).sub.x Y(C).sub.z where A is a polymer block of a monoalkenyl arene, B is a polymer block of a conjugated diene, C is a polymer block of a conjugated diene, Y is the residue of a multifunctional coupling agent, the sum of x plus z is greater than 6 and less than about 25, the ratio of x is z is between about 5 to 1 and about 1 to 5, the molecular weight of each block A is between about 3,000 and about 30,000, the molecular weight of each block B is between about 15,000 and about 100,000, and the molecular weight of each block C is between about 15,000 and about 100,000 and a tackifying resin.
Claim 3
Dependent Claim
11 words
The adhesive composition of claim 1 also containing an extending oil.
Claim 4
Dependent Claim
25 words
The adhesive composition of claim 1 wherein between 50 and 200 parts by weight tackifying resin are employed per 100 parts by weight block copolymer.
Claim 5
Dependent Claim
35 words
The adhesive composition of claim 2 wherein between 50 and 200 parts by weight tackifying resin and between 5 and 60 parts by weight extending oil are employed per 100 parts by weight block copolymer.
Claim 6
Dependent Claim
12 words
The adhesive composition of claim 1 also containing an arene-block compatible resin.
Claim 7
Dependent Claim
137 words
An Adhesive composition comprising a selectively hydrogenated block copolymer having the star-shaped, asymmetrical structure (A--B).sub.x Y(C).sub.z where A is a polymer block of a monoalkenyl arene, B is a substantially hydrogenated polymer block of a conjugated diene, C is a substantially hydrogenated polymer block of a conjugated diene, Y is the residue of a multifunctional coupling agent, the sum of x plus z is greater than 6 and less than about 25, the ratio of x to z is between about 5 to 1 and about 1 to 5 and the molecular weight of each block A is between about 3,000 and about 30,000, the molecular weight of each block B is between about 15,000 and about 100,000, and the molecular weight of each block C is between about 15,000 and about 100,000 and a tackifying resin.
Claim 8
Dependent Claim
137 words
An Adhesive composition comprising a selectively hydrogenated block copolymer having the star-shaped, asymmetrical structure (A--B).sub.x Y(C).sub.z where A is a polymer block of a monoalkenyl arene, B is a substantially hydrogenated polymer block of a conjugated diene, C is a substantially hydrogenated polymer block of a conjugated diene, Y is the residue of a multifunctional coupling agent, the sum of x plus z is greater than 6 and less than about 25, the ratio of x to z is between about 5 to 1 and about 1 to 5 and the molecular weight of each block A is between about 3,000 and about 30,000, the molecular weight of each block B is between about 15,000 and about 100,000, and the molecular weight of each block C is between about 15,000 and about 100,000 and a tackifying resin.
Claim 9
Dependent Claim
11 words
The adhesive composition of claim 6 also containing an extending oil.
Claim 10
Dependent Claim
25 words
The adhesive composition of claim 6 wherein between 50 and 200 parts by weight tackifying resin are employed per 100 parts by weight block copolymer.
Claim 11
Dependent Claim
35 words
The adhesive composition of claim 7 wherein between 50 and 200 parts by weight tackifying resin and between 5 and 60 parts by weight extending oil are employed per 100 parts by weight block copolymer.
Claim 12
Dependent Claim
12 words
The adhesive composition of claim 6 also containing an arene-block compatible resin.
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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |