US4632970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin composition
Assignee: YOJKOHAMA RUBBER Co LTD 36-11 SHINBASHI 5-CHOME MINATO-KU TOKYO JAPAN
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Filing: 1985-12-02
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Granted: 1986-12-30
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Expires: 2005-12-02
Abstract
Abstract An epoxy resin composition comprising: (a) a urethane modified epoxy resin obtained by reacting a compound having both epoxy and hydroxy groups with a urethane bond containing compound having an isocyanate group at the end thereof, which is obtained from (i) an organopolysiloxane compound having a molecular weight of 500 to 10000 and having at least two hydroxy groups per one molecule in the main chain or side chain thereof and (ii) a polyisocyanate compound; and (b) an active organic curing agent.
Inventors
- 👤 Misao Hiza
- 👤 Hajime Yamazaki
- 👤 Shigeo Omote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:51
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/61; C08G59/00; C08G59/02; C08G59/18; C08G59/20; C08G59/22; C08G59/28; C08G59/30; C08G59/306
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
An epoxy resin composition comprising: (a) a urethane modified epoxy resin obtained by reacting a compound having both epoxy and hydroxy groups with a urethane bond containing compound having an isocyanate group at the end thereof, which is obtained from (i) an organopolysiloxane compound having a molecular weight of 500 to 10000 and having at least two hydroxy groups per one molecule in the main chain or side chain thereof and (ii) a polyisocyanate compound; and (b) an active organic curing agent.
Claim 2
Dependent Claim
82 words
An epoxy resin composition comprising: (a) a urethane modified epoxy resin obtained by reacting a compound having both epoxy and hydroxy groups with a urethane bond containing compound having an isocyanate group at the end thereof, which is obtained from (i) an organopolysiloxane compound having a molecular weight of 500 to 10000 and having at least two hydroxy groups per one molecule in the main chain or side chain thereof and (ii) a polyisocyanate compound; and (b) an active organic curing agent.
Claim 3
Dependent Claim
60 words
An epoxy resin composition as claimed in claim 1, wherein the organopolysiloxane compound has the following general formula: ##STR2## wherein R 1 and R 2 are independently H, CH 3 , C 6 H 5 , or CF 3 CH 2 CH 2 and R 3 is an alkylene group or an oxyalkylene group having 1 to 10 carbon atoms.
Claim 4
Dependent Claim
22 words
An epoxy resin composition as claimed in claim 1, wherein the polyisocyanate compound has two or more isocyanate groups in the molecule.
Claim 5
Dependent Claim
32 words
An epoxy resin composition as claimed in claim 1, wherein the ratio of the hydroxy group of the organopolysiloxane compound to the isocyanate group of the polyisocyanate is from 0.75 to 0.95.
Claim 6
Dependent Claim
30 words
An epoxy resin composition as claimed in claim 1, wherein the compound having both epoxy and hydroxy groups has 1 to 3 epoxy groups and 1 to 2 hydroxy groups.
Claim 7
Dependent Claim
20 words
An epoxy resin composition as claimed in claim 5, wherein the molecular weight of the compound is 50 to 2000.
Claim 8
Dependent Claim
40 words
An epoxy resin composition as claimed in claim 1, wherein the ratio of the hydroxy group of said compound having both epoxy and hydroxy groups to the isocyanate group of said urethane bond containing compound is from 1.0 to 1.2.
Claim 9
Dependent Claim
39 words
An epoxy resin composition as claimed in claim 1, wherein the curing agent is at least one member selected from the group consisting of aliphatic amines, aromatic amines, alicyclic polyamides, polyamides, amino resins, acid anhydrides, and modified aromatic polyamines.
Claim 10
Dependent Claim
33 words
An epoxy resin composition as claimed in claim 8, wherein the amount of said curing agent is 0.1 to 1.2 amine equivalent based on one epoxy equivalent of the urethane modified epoxy resin.
References Cited (Backward Citations)
US4221896A
Cited
US4543404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |