EP0330088A2
Expired / Lapsed
EP
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Pressure sensitive adhesive composition
Assignee: Kuraray Co Ltd
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Filing: 1989-02-17
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Granted: —
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Expires: 2009-02-17
Abstract
Abstract A pressure sensitive adhesive composition is provided which comprises a tri-block copolymer (a) consisting of aromatic vinyl block-conjugated diene block-aromatic vinyl block in which the conjugated diene moiety is hydrogenated and a block copolymer consisting of an aromatic vinyl block and a conjugated diene block in which the conjugated diene moiety is hydrogenated. The adhesive composition is significantly improved in low temperatures characteristics, adhesion and processability with good adhesion.
Inventors
- 👤 Makoto Nishikawa
- 👤 Hideo Takamatsu
- 👤 Masao Ishii
- 👤 Shobu Minatono
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 20:34
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C09J153/025; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/387; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A pressure sensitive adhesive composition which comprises (a) a tri-block copolymer which consists of aromatic vinyl block-conjugated diene block-aromatic vinyl block and whose conjugated diene moiety is hydrogenated, and (b) a block copolymer of the following formula A or B which consists of an aromatic vinyl block and a conjugated diene block and whose conjugated diene moiety is hydrogenated A = (S-D) N and B = (D-S) N - D in which S: aromatic vinyl block D: conjugated diene block, and N: an integer of from 1 to 5.
Claim 2
Dependent Claim
89 words
A pressure sensitive adhesive composition which comprises (a) a tri-block copolymer which consists of aromatic vinyl block-conjugated diene block-aromatic vinyl block and whose conjugated diene moiety is hydrogenated, and (b) a block copolymer of the following formula A or B which consists of an aromatic vinyl block and a conjugated diene block and whose conjugated diene moiety is hydrogenated A = (S-D) N and B = (D-S) N - D in which S: aromatic vinyl block D: conjugated diene block, and N: an integer of from 1 to 5.
Claim 3
Dependent Claim
35 words
A pressure sensitive adhesive composition according to Claim 1, wherein the hydrogenated tri-block copolymer (a) and the hydrogenated block copolymer (b) are used at a ratio by weight of [(a)/(b)] of from 97/3 to 40/60.
Claim 4
Dependent Claim
24 words
A pressure sensitive adhesive composition according to Claim 1, wherein the hydrogenated tri-block copolymer (a) has a molecular weight of from 50,000 to 400,000.
Claim 5
Dependent Claim
42 words
A pressure sensitive adhesive composition according to Claim 1, wherein a ratio by weight of the aromatic vinyl block and the conjugated diene block (aromatic vinyl/conjugated diene) in the hydrogenated tri-block copolymer (a) is in the range of from 5/95 to 40/60.
Claim 6
Dependent Claim
24 words
A pressure sensitive adhesive composition according to Claim 1, wherein the conjugated diene used as the block of the hydrogenated tri-block copolymer is isoprene.
Claim 7
Dependent Claim
24 words
A pressure sensitive adhesive composition according to Claim 1, wherein the hydrogenated block copolymer (b) has a molecular weight of from 10,000 to 50,000.
Claim 8
Dependent Claim
42 words
A pressure sensitive adhesive composition according to Claim 1, wherein a ratio by weight of the aromatic vinyl block and the conjugated diene block (aromatic vinyl/conjugated diene) in the hydrogenated block copolymer (b) is in the range of from 5/95 to 50/50.
Claim 9
Dependent Claim
25 words
A pressure sensitive adhesive composition according to Claim 1, wherein the conjugated diene used as the block in the hydrogenated block copolymer (b) is isoprene.
References Cited (Backward Citations)
No citation records indexed.
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