US4835240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin composition
Assignee: Mitsui Chemicals Inc
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Filing: 1988-05-31
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Granted: 1989-05-30
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Expires: 2008-05-31
Abstract
Abstract An epoxy resin composition comprising a trifunctional epoxy resin derived from a trisphenol having the structure represented by the following general formula ##STR1## wherein R represents a hydrogen atom, an alkyl group or a halogen atom, and a novolak-type phenolic resin. This epoxy resin composition gives a cured product having excellent pliability and a high glass transition temperature. It is especially useful as a semiconductor encapsulating material.
Inventors
- 👤 Eiki Togashi
- 👤 Toshimasa Takata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
C; C08; C08L; C08L63/00; C08L63/04; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3218; C08G59/40; C08G59/62; C08G59/621; Y; Y10; Y10S; Y10S525/00; Y10S525/93
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
An epoxy resin composition comprising as essential components (A) a trifunctional epoxy compound obtained by condensation reaction of a phenol derivative represented by the following general formula ##STR5## wherein R 1 to R 3 represents a hydrogen atom or an alkyl group having not more than 6 carbon atoms, R 4 to R 11 represents a hydrogen atom, an alkyl group having not more than 6 carbon atoms or a halogen atom, and the groups R 1 to R 11 may be identical with each other, with epichlorohydrin, and (B) a novolak-type phenolic resin.
Claim 2
Dependent Claim
94 words
An epoxy resin composition comprising as essential components (A) a trifunctional epoxy compound obtained by condensation reaction of a phenol derivative represented by the following general formula ##STR5## wherein R 1 to R 3 represents a hydrogen atom or an alkyl group having not more than 6 carbon atoms, R 4 to R 11 represents a hydrogen atom, an alkyl group having not more than 6 carbon atoms or a halogen atom, and the groups R 1 to R 11 may be identical with each other, with epichlorohydrin, and (B) a novolak-type phenolic resin.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein the amount of the novolak-type phenolic resin is 20 to 120 parts by weight per 100 parts by weight of the epoxy resin.
Claim 4
Dependent Claim
25 words
The composition of claim 1 wherein in general formula (I), the three phenolic hydroxyl groups are each bonded to the para-position of the phenol group.
Claim 5
Dependent Claim
28 words
The composition of claim 1 wherein in general formula (I), each of R 1 to R 4 represents an alkyl group having not more than 4 carbon atoms.
Claim 6
Dependent Claim
21 words
The composition of claim 4 wherein in general formula (I), each of R 1 to R 4 represents a methyl group.
Claim 7
Dependent Claim
30 words
The resin composition of claim 1 wherein in general formula (I), each of R 4 to R 11 represents a hydrogen atom, a methyl group or a tertiary butyl group.
Claim 8
Dependent Claim
24 words
The composition of claim 1 wherein the trifunctional epoxy resin is selected from the group consisting of 1-(α-methyl-α-(4'-glycidoxyphenyl)ethyl)-4-(α',α'-bis(4"-glycidoxyphenyl)ethyl)benzene, 1-(α-methyl-α-(2'-methyl-4'-glycidoxy-5'-tert.butylphenyl)ethyl)-4-(α',α'-bis(2"-methyl-4"-glycidoxy-5"-tert.butylphenyl)ethyl)benzene, 1-(α-methyl-α-(3',5'-dimethyl-4'-glycidoxyphenyl)ethyl)-4-(.alpha.',α'-bis(3",5"-dimethyl-4"-glycidoxyphenyl)ethyl)benzene, 1-(α-methyl-α-(3'-tert.butyl-4'-glycidoxy-phenyl)ethyl)-4-(.alpha.',α'-bis(3"-tert.butyl-4"-glycidoxyphenyl)ethyl)benzene, 1-(α-methyl-α-(3'-methyl-4'-glycidoxy-5'-tert.butylphenyl)ethyl)-4-(α',α'-bis(3"-methyl-4"-glycidoxy-5"-tert.butylphenyl)ethyl)benzene, and 1-(α-methyl-α-(2',5'-dimethyl-4'-glycidoxyphenyl)ethyl)-4-(.alpha.',α'-bis(2",5"-dimethyl-4"-glycidoxyphenyl)ethyl)benzene.
Claim 9
Dependent Claim
13 words
A semiconductor encapsulating material composed of the epoxy resin composition of claim 1.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |