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Patent US4614826A successfully refreshed from Google Patents.
US4614826A
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Polyglycidyl ethers of polynuclear polyhydric phenols
Assignee: Mitsui Chemicals Inc
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Filing: 1984-02-27
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Granted: 1986-09-30
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Expires: 2004-02-27
Abstract
Abstract Disclosed are a polynuclear polyhydric phenol represented by the following general formula [I]: <IMAGE> [I] <IMAGE> wherein R1 and R2 stand for a hydrogen atom or a lower alkyl group, R3 stands for a hydrogen atom, an alkyl group, an aryl group or a halogen atom, and n is an integer of from 0 to 10, and a polyepoxy compound consisting of a polyglycidyl ether of this polynuclear polyhydric ether. When this polyepoxy compound is combined with a curing agent, a curable epoxy resin composition excellent in the heat resistance characteristics is provided.
Inventors
- 👤 Shigeru Katayama
- 👤 Takayuki Nakano
- 👤 Nobuyuki Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/12; C07C39/15
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
11 words
A polyepoxy compound which is represented by the following formula: ##STR19##
Claim 2
Dependent Claim
11 words
A polyepoxy compound which is represented by the following formula: ##STR19##
Claim 3
Dependent Claim
60 words
A polyepoxy compound consisting of a polyglycidyl ether of a polyhydric phenol of the formula: ##STR20## wherein R 1 and R 2 represent a hydrogen atom, R 3 represents CH 3 , t--C 4 H 9 or Cl, and n is 0 or 2, and wherein at least 80% of the phenolic hydroxyl groups are converted to glycidyl ether groups.
Claim 4
Dependent Claim
60 words
A polyepoxy compound consisting of a polyglycidyl ether of a polyhydric phenol of the formula: ##STR20## wherein R 1 and R 2 represent a hydrogen atom, R 3 represents CH 3 , t--C 4 H 9 or Cl, and n is 0 or 2, and wherein at least 80% of the phenolic hydroxyl groups are converted to glycidyl ether groups.
Claim 5
Dependent Claim
52 words
A polyepoxy compound consisting of a polyglycidyl ether of a polyhydric phenol of the formula: ##STR21## wherein R 1 and R 2 represent a hydrogen atom, R 3 represents CH 3 , and n is 0, and wherein at least 80% of the phenolic hydroxyl groups are converted to glycidyl ether groups.
Claim 6
Dependent Claim
52 words
A polyepoxy compound consisting of a polyglycidyl ether of a polyhydric phenol of the formula: ##STR21## wherein R 1 and R 2 represent a hydrogen atom, R 3 represents CH 3 , and n is 0, and wherein at least 80% of the phenolic hydroxyl groups are converted to glycidyl ether groups.
Claim 7
Dependent Claim
52 words
A polyepoxy compound consisting of a polyglycidyl ether of a polyhydric phenol of the formula: ##STR22## wherein R 1 and R 2 represent a hydrogen atom, R 3 represents CH 3 , and n is 0, and wherein at least 80% of the phenolic hydroxyl groups are converted to glycidyl ether groups.
Claim 8
Dependent Claim
52 words
A polyepoxy compound consisting of a polyglycidyl ether of a polyhydric phenol of the formula: ##STR22## wherein R 1 and R 2 represent a hydrogen atom, R 3 represents CH 3 , and n is 0, and wherein at least 80% of the phenolic hydroxyl groups are converted to glycidyl ether groups.
References Cited (Backward Citations)
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JPS5813528A
Cited
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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) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |