Patent US4898919A successfully refreshed from Google Patents.
US4898919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane adhesive
Assignee: Sunstar Giken KK
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Filing: 1988-07-22
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Granted: 1990-02-06
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Expires: 2008-07-22
Abstract
Abstract A polyurethane adhesive comprising (a) a specific block polyurethane polyol produced by reacting a hydrogenated polybutadiene glycol, a polyol having two or more hydroxy groups, and a polyisocyanate, (b) a thermoplastic polyester urethane rubber, and (c) a polyisocyanate compound as a crosslinking agent, said polyurethane adhesive being useful for adhesion of low polar materials, particularly adhesion between polypropylene materials and sheets of polyvinyl chloride.
Inventors
- 👤 Ryuichi Ueda
- 👤 Masahito Mori
- 👤 Kohske Torii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:43
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/28; C08G18/40; C08G18/62; C08G18/6204; C08G18/6208
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
46 words
A polyurethane adhesive which comprises (a) a block polyurethane polyol produced by reacting a hydrogenated polybutadiene glycol, a polyol having two or more hydroxy groups in the molecule and a polyisocyanate, (b) a thermoplastic polyester urethane rubber, and (c) a polyisocyanate compound as a crosslinking agent.
Claim 2
Dependent Claim
46 words
A polyurethane adhesive which comprises (a) a block polyurethane polyol produced by reacting a hydrogenated polybutadiene glycol, a polyol having two or more hydroxy groups in the molecule and a polyisocyanate, (b) a thermoplastic polyester urethane rubber, and (c) a polyisocyanate compound as a crosslinking agent.
Claim 3
Dependent Claim
59 words
The polyurethane adhesive according to claim 1, wherein the block polyurethane polyol (a) is produced by reacting a hydrogenated polybutadiene glycol having a terminal hydroxy group with an excess amount of a polyisocyanate to produce a urethane prepolymer having an active isocyanate group and then further reacting with a polyol having two or more hydroxy groups in the molecule.
Claim 4
Dependent Claim
57 words
The polyurethane adhesive according to claim 1, wherein the block polyurethane polyol is produced by reacting firstly a polyol having two or more hydroxy groups in the molecule with an excess amount of a polyisocyanate to produce a urethane prepolymer having an active isocyanate group and then reacting with a hydrogenated polybutadiene glycol having terminal hydroxy group.
Claim 5
Dependent Claim
68 words
The polyurethane adhesive according to claim 1, wherein the block polyurethane polyol (a) is contained in an amount of 2 to 100 parts by weight to 100 parts by weight of the thermoplastic polyester urethane rubber (b), and the polyisocyanate compound (c) is contained in an amount of 1 to 20 parts by weight per 100 parts by weight of the sum of the components (a) and (b).
Claim 6
Dependent Claim
69 words
The polyurethane adhesive according to claim 4, wherein the the block polyurethane polyol (a) is contained in an amount of 20 to 60 parts by weight to 100 parts by weight of the thermoplastic polyester urethane rubber (b), and the polyisocyanate compound (c) is contained in an amount of 2 to 10 parts by weight per 100 parts by weight of the sum of the components (a) and (b).
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |