US4128531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting resin composition
Assignee: Resonac Corp
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Filing: 1977-10-18
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Granted: 1978-12-05
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Expires: 1997-10-18
Abstract
Abstract A thermosetting resin composition comprising a polyfunctional epoxy compound such as diglycidyl ether of bisphenol A, a polyfunctional isocyanate such as diphenylmethane diisocyanate, a curing agent and polybutadiene type polymer having terminal hydroxyl groups can produce cured articles excellent in heat resistance and crack resistance.
Inventors
- 👤 Shinichi Toyoda
- 👤 Masahiko Sakai
- 👤 Kazuo Goto
- 👤 Toshikazu Narahara
- 👤 Yoshiharu Karasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:17
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/003; C08G18/28; C08G18/67; C08G18/69; C08L; C08L63/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A thermosetting resin composition comprising (a) one or more polyfunctional epoxy compounds, (b) one or more polyfunctional isocyanates, (c) one or more curing agents, and (d) at least one polymer of butadiene having terminal hydroxyl groups represented by the formula: ##STR5## wherein R is hydrogen, alkyl, alkenyl, nitrilo, or phenyl; a ≧ 0.7, b ≦ 0.3, and a + b = 1; and n is an integer which determines the molecular weight of the polymer of butadiene in the range of from 500 to 5,000.
Claim 2
Dependent Claim
85 words
A thermosetting resin composition comprising (a) one or more polyfunctional epoxy compounds, (b) one or more polyfunctional isocyanates, (c) one or more curing agents, and (d) at least one polymer of butadiene having terminal hydroxyl groups represented by the formula: ##STR5## wherein R is hydrogen, alkyl, alkenyl, nitrilo, or phenyl; a ≧ 0.7, b ≦ 0.3, and a + b = 1; and n is an integer which determines the molecular weight of the polymer of butadiene in the range of from 500 to 5,000.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, wherein the curing agent is at least one member selected from the group consisting of amines, quaternary ammonium salts and imidazoles.
Claim 4
Dependent Claim
38 words
A composition according to claim 1, wherein the component (d) is contained in an amount of from 3 to 100 parts by weight per 100 parts by weight of the total of the components (a), (b) and (c).
Claim 5
Dependent Claim
28 words
A composition according to claim 1, wherein at least one of the polyfunctional epoxy compound and the polyfunctional isocyanate contains one or more halogen atoms in the molecule.
Claim 6
Dependent Claim
17 words
A composition according to claim 1, wherein the polyfunctional epoxy compound is diglycidyl ether of bisphenol A.
Claim 7
Dependent Claim
13 words
A composition according to claim 1, wherein the polyfunctional isocyanate is diphenylmethane dissocyanate.
Claim 8
Dependent Claim
26 words
A composition according to claim 1, wherein the polymer of butadiene having terminal hydroxyl groups is a copolymer of butadiene and acrylonitrile having terminal hydroxyl groups.
Claim 9
Dependent Claim
26 words
A composition according to claim 1, wherein the polymer of butadiene having terminal hydroxyl groups is a copolymer of butadiene and styrene having terminal hydroxyl groups.
References Cited (Backward Citations)
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Cited
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US3459828A
Cited
US3636133A
Cited
US3694406A
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US4055541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |