Patent US4529790A successfully refreshed from Google Patents.
US4529790A
Expired / Lapsed
US
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Epoxy resin composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1984-07-31
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Granted: 1985-07-16
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Expires: 2004-07-31
Abstract
Abstract An epoxy resin composition comprising a polyglycidyl ether prepared by reacting a 3-methyl-6-alkylphenol in the presence or absence of a phenol other than the 3-methyl-6-alkylphenol with an aldehyde to obtain a novolak, and then reacting the novolak with an epihalohydrin, which composition is useful in electronic fields, for example, for encapsulating semiconductor products or for the production of printed circuit boards.
Inventors
- 👤 Kunimasa Kamio
- 👤 Hisao Takagishi
- 👤 Shuichi Kanagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:51
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0326; C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/08; C08G8/00; C08G8/04; C08L; C08L63/00; C08L63/04; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H10; H10W; H10W74/00; H10W74/40; H10W74/47
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
39 words
An epoxy resin composition comprising a polyglycidyl ether prepared by reacting a 3-methyl-6-alkylphenol in the presence or absence of a phenol other than the 3-methyl-6-alkylphenol with an aldehyde to obtain a novolak, and reacting the novolak with an epihalohydrin.
Claim 2
Dependent Claim
39 words
An epoxy resin composition comprising a polyglycidyl ether prepared by reacting a 3-methyl-6-alkylphenol in the presence or absence of a phenol other than the 3-methyl-6-alkylphenol with an aldehyde to obtain a novolak, and reacting the novolak with an epihalohydrin.
Claim 3
Dependent Claim
34 words
The composition according to claim 1, wherein the composition further contains at least one member selected from curing agents, curing accelerators, conventional epoxy resins, fillers, fire retardants, coloring agents, surface-processing agents and release agents.
Claim 4
Dependent Claim
22 words
The composition according to claim 2, wherein the curing agent is a member selected from dicyandiamide, hydrazides, novolaks, amines and acid anhydrides.
Claim 5
Dependent Claim
26 words
The composition according to claim 3, wherein the amount of the curing agent is from 0.5 to 1.5 equivalents per epoxy group of the polyglycidyl ether.
Claim 6
Dependent Claim
23 words
The composition according to claim 1, wherein the composition is the one prepared by melt-kneading the polyglycidyl ether, followed by cooling and pulverizing.
Claim 7
Dependent Claim
22 words
The composition according to claim 1, wherein the composition is a varnish prepared by dissolving the polyglycidyl ether in an organic solvent.
Claim 8
Dependent Claim
34 words
A polyglycidyl ether prepared by reacting a 3-methyl-6-alkylphenol in the presence or absence of a phenol other than the 3-methyl-6-alkylphenol with an aldehyde to obtain a novolak, and reacting the novolak with an epihalohydrin.
Claim 9
Dependent Claim
34 words
A polyglycidyl ether prepared by reacting a 3-methyl-6-alkylphenol in the presence or absence of a phenol other than the 3-methyl-6-alkylphenol with an aldehyde to obtain a novolak, and reacting the novolak with an epihalohydrin.
Claim 10
Dependent Claim
12 words
A product obtained by curing the epoxy resin composition of claim 1.
Claim 11
Dependent Claim
17 words
A method for encapsulating a semiconductor product, which comprises using the epoxy resin composition of claim 1.
Claim 12
Dependent Claim
18 words
A method for producing a printed circuit board, which comprises using the epoxy resin composition of claim 1.
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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |