Patent US4328150A successfully refreshed from Google Patents.
US4328150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable epoxy resin compositions
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1981-03-12
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Granted: 1982-05-04
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Expires: 2001-03-12
Abstract
Abstract The invention provides a novel epoxy-based curable resin composition suitable for encapsulation of electronic devices such as transistors, ICs, LSIs and the like. The composition comprises an epoxy compound, a novolac-type phenolic resin as the curing agent, an organophosphine compound such as triphenylphosphine and trilaurylphosphine as a curing accelerator and an inorganic filler. The advantages obtained by the combined use of the novolac-type phenolic resin and the organophosphine compound are very specific and the resin composition is imparted with remarkable flowability in molding and stability in storage in addition to the excellent electric properties at high temperatures and anti-moisture resistance of the cured shaped articles molded therefrom.
Inventors
- 👤 Kiyohiro Kondow
- 👤 Tetuo Yoshida
- 👤 Yuki Tateyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:05
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/47; H10W74/473; C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/688; C08L; C08L63/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A curable epoxy resin composition which comprises (a) an epoxy compound having at least two epoxy groups per molecule, (b) a novolac-type phenolic resin in an amount sufficient to give from 0.5 to 4.0 moles of the phenolic hydroxy groups per mole of the epoxy groups in the epoxy compound as the component (a), (c) an organophosphine compound in an amount sufficient to give from 0.04 to 0.50 part by weight of phosphorus per 100 parts by weight of the total amount of the epoxy compound as the component (a) and the novolac-type phenolic resin as the component (b), and (d) an inorganic filler in an amount from 50 to 500 parts by weight per 100 parts by weight of the total amount of the epoxy compound as the component (a) and the novolac-type phenolic resin as the component (b).
Claim 2
Dependent Claim
140 words
A curable epoxy resin composition which comprises (a) an epoxy compound having at least two epoxy groups per molecule, (b) a novolac-type phenolic resin in an amount sufficient to give from 0.5 to 4.0 moles of the phenolic hydroxy groups per mole of the epoxy groups in the epoxy compound as the component (a), (c) an organophosphine compound in an amount sufficient to give from 0.04 to 0.50 part by weight of phosphorus per 100 parts by weight of the total amount of the epoxy compound as the component (a) and the novolac-type phenolic resin as the component (b), and (d) an inorganic filler in an amount from 50 to 500 parts by weight per 100 parts by weight of the total amount of the epoxy compound as the component (a) and the novolac-type phenolic resin as the component (b).
Claim 3
Dependent Claim
47 words
The curable epoxy resin composition as claimed in claim 1 wherein the organophosphine compound is represented by the general formula R 1 a H 3-a P, in which R 1 is an alkyl or an aryl group and a is an integer of 1, 2 or 3.
Claim 4
Dependent Claim
28 words
The curable epoxy resin composition as claimed in claim 2 wherein the organophosphine compound is a tertiary phosphine compound represented by the general formula R 1 3 P.
Claim 5
Dependent Claim
17 words
The curable epoxy resin composition as claimed in claim 3 wherein the tertiary phosphine compound is triphenylphosphine.
Claim 6
Dependent Claim
17 words
The curable epoxy resin composition as claimed in claim 3 wherein the tertiary phosphine compound is trilaurylphosphine.
References Cited (Backward Citations)
US2768153A
Cited
US3759866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |