Patent US4759978A successfully refreshed from Google Patents.
US4759978A
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Epoxy resin composition
Assignee: Mitsui Chemicals Inc
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Filing: 1986-09-29
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Granted: 1988-07-26
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Expires: 2006-09-29
Abstract
Abstract A novel epoxy resin composition is obtained by modifying a bisphenol-type epoxy resin and/or a halogen-containing epoxy resin with a trisphenol represented by the following general formula: <IMAGE> wherein each of R1 and R2 represents hydrogen or an alkyl group havng not more than 6 carbon atoms with the proviso that at least one of them is the alkyl group, each of R3, R4 and R5 represents hydrogen or an alkyl group having not more than 4 carbon atoms, and n represents a number of 0 or 1. The composition is suitable, for example, as a paint, a casting material or a molding material.
Inventors
- 👤 Toshimasa Takata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:00
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08G59/32; C08G59/3218; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0326; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2475; Y10T442/2861; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
An epoxy resin composition comprising the reaction product of (A) a compound having three phenolic hydroxyl groups in the molecule represented by the following general formula: ##STR7## wherein each of R 1 and R 2 represents hydrogen or an alkyl group having not more than 6 carbon atoms with the proviso that at least one of them is the alkyl group, and each of R 3 , R 4 and R 5 represents hydrogen or an alkyl group having not more than 4 carbon atoms, with an epoxy resin selected from the group consisting of (B) a bisphenol epoxy resin, (C) a halogen-containing epoxy resin and mixtures thereof, the number of the phenolic hydroxyl groups of the compound (A) being 0.03 to 0.7 per epoxy group of the epoxy resin.
Claim 2
Dependent Claim
130 words
An epoxy resin composition comprising the reaction product of (A) a compound having three phenolic hydroxyl groups in the molecule represented by the following general formula: ##STR7## wherein each of R 1 and R 2 represents hydrogen or an alkyl group having not more than 6 carbon atoms with the proviso that at least one of them is the alkyl group, and each of R 3 , R 4 and R 5 represents hydrogen or an alkyl group having not more than 4 carbon atoms, with an epoxy resin selected from the group consisting of (B) a bisphenol epoxy resin, (C) a halogen-containing epoxy resin and mixtures thereof, the number of the phenolic hydroxyl groups of the compound (A) being 0.03 to 0.7 per epoxy group of the epoxy resin.
Claim 3
Dependent Claim
13 words
The epoxy resin composition of claim 1 wherein the compound (A) is 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane.
Claim 4
Dependent Claim
37 words
The epoxy resin composition of claim 1 wherein the bisphenol epoxy resin (B) is present and is an epoxy resin having an epoxy equivalent of 170 to 500 obtained by the reaction of bisphenol A with epichlorohydrin.
Claim 5
Dependent Claim
46 words
The epoxy resin composition of claim 1 wherein the halogen-containing epoxy resin (C) is present and is the reaction product of bromine-containing bisphenol A with epichlorohydrin, which product has a bromine content of 30 to 50% by weight and an epoxy equivalent of 328 to 2,000.
Claim 6
Dependent Claim
16 words
The epoxy resin composition of claim 1 which has an epoxy equivalent of 200 to 1,800.
Claim 7
Dependent Claim
19 words
The epoxy resin composition of claim 1 which has a halogen (bromine) content of 15 to 30% by weight.
Claim 8
Dependent Claim
188 words
A laminated plate obtained by consolidating under heat and pressure prepregs composed of a reinforcing fibrous base material and a combination of an epoxy resin and a curing agent impregnated in the base material, said epoxy resin being an epoxy resin composition comprising the reaction product of (A) a compound having three phenolic hydroxyl groups in the molecule represented by the following general formula: ##STR8## wherein each of R 1 and R 2 represents hydrogen or an alkyl group having not more than 6 carbon atoms with the proviso that at least one of them is the alkyl group, and each of R 3 , R 4 and R 5 represents hydrogen or an alkyl group having not more than 4 carbon atoms, with an epoxy resin selected from the group consisting of (B) a bisphenol epoxy resin, (C) a halogen-containing epoxy resin and mixtures thereof, the number of the phenolic hydroxyl groups of the compound (A) being 0.03 to 0.7 per epoxy group of the epoxy resin, and said laminate having a glass transition temperature (Tg), measured by a differential scanning calorimeter, of at least 150° C.
Claim 9
Dependent Claim
188 words
A laminated plate obtained by consolidating under heat and pressure prepregs composed of a reinforcing fibrous base material and a combination of an epoxy resin and a curing agent impregnated in the base material, said epoxy resin being an epoxy resin composition comprising the reaction product of (A) a compound having three phenolic hydroxyl groups in the molecule represented by the following general formula: ##STR8## wherein each of R 1 and R 2 represents hydrogen or an alkyl group having not more than 6 carbon atoms with the proviso that at least one of them is the alkyl group, and each of R 3 , R 4 and R 5 represents hydrogen or an alkyl group having not more than 4 carbon atoms, with an epoxy resin selected from the group consisting of (B) a bisphenol epoxy resin, (C) a halogen-containing epoxy resin and mixtures thereof, the number of the phenolic hydroxyl groups of the compound (A) being 0.03 to 0.7 per epoxy group of the epoxy resin, and said laminate having a glass transition temperature (Tg), measured by a differential scanning calorimeter, of at least 150° C.
Claim 10
Dependent Claim
31 words
The epoxy resin composition of claim 1 in which the number of phenolic hydroxyl groups of the compound (A) is from 0.05 to 0.6 per epoxy group of the epoxy resin.
Claim 11
Dependent Claim
23 words
The epoxy resin composition of claim 1 in which in the formula R 4 is a methyl group and R 5 is hydrogen.
Claim 12
Dependent Claim
20 words
The epoxy resin composition of claim 1 in which in the formula R 3 represents a methyl or ethyl group.
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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |