US4701481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Durable epoxy resin
Assignee: Dow Chemical Co
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Filing: 1986-10-30
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Granted: 1987-10-20
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Expires: 2006-10-30
Abstract
Abstract Curable compositions are prepared from reinforced epoxy resin compositions comprising (A) a filler material such as silica flour, (B) one or more epoxy resins at least one of which is a hydrocarbon novolac epoxy resin such as a phenol-dicyclopentadiene epoxy novolac resin and (C) one or more epoxy resin curing agents such as phenol-formaldehyde novolac resin. These compositions are particularly suitable for use in electrical applications such as the encapsulation and subsequent protection of electrical and micro-electronic devices and circuitry and in adhesive formulations.
Inventors
- 👤 Gary W. Bogan
- 👤 Peter A. Lucas
- 👤 Georgia A. Monnerat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:33
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08K; C08K3/00; C08K3/34; C08K3/36; C08L; C08L63/00; C08L63/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
81 words
In a curable composition comprising (A) at least one filler material; (B) at least one epoxy resin; and (C) at least one curing agent for component (B); the improvement which comprises employing as at least a part of component (B) at least one hydrocarbon epoxy novolac resin, halogenated epoxy hydrocarbon novolac resin or combination thereof in an amount such that at least about 40 percent of the epoxy groups present in component (B) are contributed by said hydrocarbon epoxy novolac resins.
Claim 2
Dependent Claim
81 words
In a curable composition comprising (A) at least one filler material; (B) at least one epoxy resin; and (C) at least one curing agent for component (B); the improvement which comprises employing as at least a part of component (B) at least one hydrocarbon epoxy novolac resin, halogenated epoxy hydrocarbon novolac resin or combination thereof in an amount such that at least about 40 percent of the epoxy groups present in component (B) are contributed by said hydrocarbon epoxy novolac resins.
Claim 3
Dependent Claim
170 words
A curable composition of claim 1 wherein (i) component (A) is silica flour; (ii) component (B) is the product resulting from dehydrohalogenating the reaction product of an epihalohydrin and (1) one or more hydrocarbon novolac resins, (2) one or more halogenated hydrocarbon novolac resins, (3) a combination of (1) and (2) or (4) a combination of (a) one or more hydrocarbon novolac resins or one or more halogenated hydrocarbon novolac resins or a combination thereof and (b) one or more phenol-aldehyde novolac resins, one or more halogenated phenol-aldehyde novolac resins, one or more bisphenol A based resins, one or more halogenated bisphenol A based resins or any combination thereof; (iii) component (C) is a phenolic material or a carboxylic acid anhydride or mixture thereof; and (iv) said hydrocarbon epoxy novolac resin or halogenated hydrocarbon epoxy novolac resin is present in an amount such that from about 90 to about 100 percent of the epoxy groups present in component (B) are contributed by said hydrocarbon epoxy novolac resin or combination thereof.
Claim 4
Dependent Claim
106 words
A curable composition of claim 2 wherein component (B) contains the product resulting from dehydrohalogenating the reaction product of an epihalohydrin and the product resulting from reacting phenol, cresol or a combination thereof with (a) an unsaturated hydrocarbon containing an average of from 6 to about 55 carbon atoms per molecule or halogenated derivatives of such reaction products, or mixture of such hydrocarbons or halogenated derivatives thereof; (b) oligomers and/or cooligomers of hydrocarbon dienes or halogenated hydrocarbon dienes, which dienes have from 4 to about 24 carbon atoms or mixture of such hydrocarbon dienes or halogenated hydrocarbon dienes or (c) a combination of (a) and (b).
Claim 5
Dependent Claim
111 words
A curable composition of claim 2 wherein component (B) contains (i) the product resulting from dehydrohalogenating the reaction product of epichlorohydrin and the product resulting from reacting phenol, cresol or a combination thereof with a composition comprising from about 70 to about 100 percent by weight of dicyclopentadiene, from about zero to about 30 percent by weight of C 10 dimers, from about zero to about 7 percent by weight of oligomers of C 4 -C 6 unsaturated hydrocarbons and the balance if any to provide 100% by weight of C 4 -C 6 alkanes, alkenes or dienes; (ii) halogenated derivatives of the product of component (i); or (iii) combinations thereof.
Claim 6
Dependent Claim
83 words
A curable composition of claim 2 wherein component (B) contains (i) the product resulting from dehydrohalogenating the reaction product of epichlorohydrin and the product resulting from reacting phenol, cresol or a combination thereof with a composition comprising from about 95% to about 100% by weight of dicyclopentadiene and the balance, if any, to provide 100% by weight of C 4 to C 7 saturated or unsaturated hydrocarbons or oligomers thereof; (ii) halogenated derivatives of the product of component (i); or (iii) combinations thereof.
Claim 7
Dependent Claim
177 words
A curable composition of claim 1 wherein (i) component (A) is fumed or colloidal silica, metal powder, synthetic rubber material or a combination thereof; (ii) component (B) is the product resulting from dehydrohalogenating the reaction product of an epihalohydrin and (1) one or more hydrocarbon novolac resins, (2) one or more halogenated hydrocarbon novolac resins, (3) a combination of (1) and (2) or (4) a combination of (a) one or more hydrocarbon novolac resins or one or more halogenated hydrocarbon novolac resins or a combination thereof and (b) one or more phenol-aldehyde novolac resins, one or more bisphenol A based resins, one or more halogenated bisphenol A based resins or any combination thereof; (iii) component (C) is dicyandiamide, diaminodiphenyl sulfone, methylenedianiline or a combination thereof; and (iv) said hydrocarbon epoxy novolac resin or halogenated hydrocarbon epoxy novolac resin is present in an amount such that from about 90 to about 100 percent of the epoxy groups present in component (B) are contributed by said hydrocarbon epoxy novolac resin or halogenated hydrocarbon epoxy novolac resin or combination thereof.
Claim 8
Dependent Claim
106 words
A curable composition of claim 6 wherein component B contains the product resulting from dehydrohalogenating the reaction product of an epihalohydrin and the product resulting from reacting phenol, cresol, or a combination thereof with (a) an unsaturated hydrocarbon containing an average of from 6 to about 55 carbon atoms per molecule or halogenated derivatives of such reaction products, or mixture of such hydrocarbon or halogenated derivatives thereof; (b) oligomers and/or co-oligomers of hydrocarbon dienes or halogenated hydrocarbon dienes which dienes have from 4 to about 24 carbon atoms or mixture of such hydrocarbon dienes or halogenated hydrocarbon dienes or (c) a combination of (a) and (b).
Claim 9
Dependent Claim
111 words
A curable composition of claim 6 wherein component (B) contains (i) the product resulting from dehydrohalogenating the reaction product of epichlorohydrin and the product resulting from reacting phenol, cresol or a combination thereof with a composition comprising from about 70 to about 100 percent by weight of dicyclopentadiene, from about zero to about 30 percent by weight of C 10 dimers, from about zero to about 7 percent by weight of oligomers of C 4 -C 6 unsaturated hydrocarbons and the balance, if any, to provide 100% by weight of C 4 -C 6 alkanes, alkenes or dienes; (ii) halogenated derivatives of the product of component (i); or (iii) combinations thereof.
Claim 10
Dependent Claim
84 words
A curable composition of claim 6 wherein component (B) contains (i) the product resulting from dehydrohalogenating the reaction product of epichlorohydrin and the product resulting from reacting phenol, cresol or a combination thereof with a composition comprising from about 95 percent to about 100% by weight of dicyclopentadiene and the balance, if any, to provide 100% by weight of C 4 to C 7 saturated or unsaturated hydrocarbons or oligomers thereof; (ii) halogenated derivatives of the product of component (i); or (iii) combinations thereof.
Claim 11
Dependent Claim
12 words
An electrical or electronic component encapsulated with a composition of claim 1.
Claim 12
Dependent Claim
12 words
An electrical or electronic component encapsulated with a composition of claim 2.
Claim 13
Dependent Claim
12 words
An electrical or electronic component encapsulated with a composition of claim 3.
Claim 14
Dependent Claim
12 words
An electrical or electronic component encapsulated with a composition of claim 4.
Claim 15
Dependent Claim
12 words
An electrical or electronic component encapsulated with a composition of claim 5.
Claim 16
Dependent Claim
12 words
One or more substrates bonded together with a composition of claim 1.
Claim 17
Dependent Claim
12 words
One or more substrates bonded together with a composition of claim 6.
Claim 18
Dependent Claim
12 words
One or more substrates bonded together with a composition of claim 7.
Claim 19
Dependent Claim
12 words
One or more substrates bonded together with a composition of claim 8.
Claim 20
Dependent Claim
12 words
One or more substrates bonded together with a composition of claim 9.
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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) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |