US5089550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymer composition
Assignee: JSR Corp
•
Filing: 1988-03-04
•
Granted: 1992-02-18
•
Expires: 2008-03-04
Abstract
Abstract PCT No. PCT/EP88/00176 Sec. 371 Date Oct. 2, 1989 Sec. 102(e) Date Oct. 2, 1989 PCT Filed Mar. 4, 1988 PCT Pub. No. WO89/08128 PCT Pub. Date Sep. 8, 1989.A block copolymer composition comprising 40-85% by weight of a block copolymer A1-B1 from an aromatic vinyl compound and a conjugated diene, respectively, A1 being <20% by weight of (A1+B1), A1 and B1 having a molecular weight >12,000 and >150,000, respectively, and 15-60% by weight of a block copolymer A2-B2-A3 from an aromatic vinyl compound, a conjugated diene and aromatic vinyl compound, respectively, A2+A3 being >20% by weight of A2+B2+A3, A2 and A3 having a molecular weight >12,000 and (molecular weight of B2)</=(molecular weight of B1)/1.5. an adhesive composition comprising 100 parts by weight (pbw) of said block copolymer composition, 20-300 pbw of a tackifying resin, and 0-200 pbw of a softener, and a process for the preparation of said adhesive composition by mixing the components in question.
Inventors
- 👤 Toshinori Sakagami
- 👤 Yasuo Toyama
- 👤 Hisaharu Ito
- 👤 Takumi Miyachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:43
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C08; C08F; C08F297/00; C08F297/02; C08F297/04; C08F297/046
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
231 words
A block copolymer composition comprising (1) in the range of from 50 to 85% by weight of a block copolymer of the formula (I) A.sub.1 -B.sub.1 (I) wherein A 1 and B 1 represent a polymer block of an aromatic vinyl compound and a conjugated diene, respectively, said block copolymer (I) containing said polymer block of the aromatic vinyl compound A 1 in an amount of less than 20% by weight of the total weight of A 1 and B 1 , and said A 1 and B 1 having a weight average molecular weight of greater than 12,000 and greater than 150,000, respectively; and (2) in the range of from 15 to 50% by weight of a block copolymer of the formula (II) A.sub.2 --B.sub.2 --A.sub.3 (II) wherein A 2 and A 3 each represent a polymer block of an aromatic vinyl compound and B 2 represents a polymer block of a conjugated diene, which block copolymer (II) has a total content of the polymer blocks of the aromatic vinyl compound A 2 and A 3 of more than 20% by weight of the total weight of A 2 , B 2 and A 3 , with A 2 and A 3 each having a weight average molecular weight of greater than 12,000, and wherein (weight average molecular weight of B 2 )≦(weight average molecular weight of B 1 )/1.5.
Claim 2
Dependent Claim
231 words
A block copolymer composition comprising (1) in the range of from 50 to 85% by weight of a block copolymer of the formula (I) A.sub.1 -B.sub.1 (I) wherein A 1 and B 1 represent a polymer block of an aromatic vinyl compound and a conjugated diene, respectively, said block copolymer (I) containing said polymer block of the aromatic vinyl compound A 1 in an amount of less than 20% by weight of the total weight of A 1 and B 1 , and said A 1 and B 1 having a weight average molecular weight of greater than 12,000 and greater than 150,000, respectively; and (2) in the range of from 15 to 50% by weight of a block copolymer of the formula (II) A.sub.2 --B.sub.2 --A.sub.3 (II) wherein A 2 and A 3 each represent a polymer block of an aromatic vinyl compound and B 2 represents a polymer block of a conjugated diene, which block copolymer (II) has a total content of the polymer blocks of the aromatic vinyl compound A 2 and A 3 of more than 20% by weight of the total weight of A 2 , B 2 and A 3 , with A 2 and A 3 each having a weight average molecular weight of greater than 12,000, and wherein (weight average molecular weight of B 2 )≦(weight average molecular weight of B 1 )/1.5.
Claim 3
Dependent Claim
54 words
A block copolymer composition as claimed in claim 1 in which the content of the polymer block of the aromatic vinyl compound A 1 in the block copolymer of the formula I is in the range of from 4 to 18% by weight of the total weight of A 1 and B 1 .
Claim 4
Dependent Claim
52 words
A block copolymer composition as claimed in claim 1 or 2 in which the molecular weight average weights of the polymer block of the aromatic vinyl compound A 1 and of the conjugated diene B 1 are in the range of from 12,000 to 55,000 and of from 150,000 to 300,000, respectively.
Claim 5
Dependent Claim
61 words
A block copolymer composition as claimed in claim 1 in which the total content of the polymer blocks of the aromatic vinyl compounds A 2 and A 3 in the block copolymer of the formula II is in the range of from 25 to 80% by weight of the total weight of A 2 , B 2 and A 3 .
Claim 6
Dependent Claim
38 words
A block copolymer composition as claimed in claim 1 in which the polymer blocks of the aromatic vinyl compounds A 2 and A 3 have a weight average molecular weight in the range of from 12,000 to 55,000.
Claim 7
Dependent Claim
34 words
A block copolymer composition as claimed in claim 1 in which A 1 in the formula I and A 2 and A 3 in the formula II each represent a polymer block of styrene.
Claim 8
Dependent Claim
33 words
A block copolymer composition as claimed in claim 1 in which B 1 in the general formula I and B 2 in the general formula II each represent a polymer block of isoprene.
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) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |