US4440914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid epoxy resin systems
Assignee: BASF Corp
•
Filing: 1982-09-20
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Granted: 1984-04-03
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Expires: 2002-09-20
Abstract
Abstract Solid epoxy resin systems comprising the reaction products of a polyepoxide compound with a functionality greater than two, a diglycidyl ether of a polyhydric phenol and a polyhydric phenol; said systems being applicable for use in a variety of applications and particularly in combination with phenolic novolac hardeners for molding applications.
Inventors
- 👤 David Helfand
- 👤 Ralph F. Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:07
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/18; C08G59/20; C08G59/32; C08G59/38
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
123 words
A solid advanced epoxy resin comprising the reaction product resulting from a catalyzed advancement reaction of (a) a polyepoxide resin having a functionality greater than two, said resin (1) corresponding to the formula ##STR4## wherein R is H or CH 3 and n is about 0.2-6.0, or (2) being the tetraglycidyl ether of tetra[hydroxyphenyl)ethane; (b) a diglycidyl ether of a polyhydric phenol or the alkyl or halogen derivatives thereof; and (c) a polyhydric phenol or the alkyl or halogen derivatives thereof; components (a) and (b) being present in concentration ranges of from 60-90%, by weight, and 10-40%, by weight, respectively, and component (c) being present in a concentration range of 2 to 23%, based on the total weight of components (a) and (b).
Claim 2
Dependent Claim
123 words
A solid advanced epoxy resin comprising the reaction product resulting from a catalyzed advancement reaction of (a) a polyepoxide resin having a functionality greater than two, said resin (1) corresponding to the formula ##STR4## wherein R is H or CH 3 and n is about 0.2-6.0, or (2) being the tetraglycidyl ether of tetra[hydroxyphenyl)ethane; (b) a diglycidyl ether of a polyhydric phenol or the alkyl or halogen derivatives thereof; and (c) a polyhydric phenol or the alkyl or halogen derivatives thereof; components (a) and (b) being present in concentration ranges of from 60-90%, by weight, and 10-40%, by weight, respectively, and component (c) being present in a concentration range of 2 to 23%, based on the total weight of components (a) and (b).
Claim 3
Dependent Claim
16 words
The resin product of claim 1, wherein component (a) is the epoxidation product of cresol novolacs.
Claim 4
Dependent Claim
15 words
The resin product of claim 1, wherein component (a) is the tetraglycidyl ether of tetra[hydroxyphenyl]ethane.
Claim 5
Dependent Claim
36 words
The resin product of claim 1, wherein component (b) is selected from the group consisting of diglycidyl ethers of bisphenols corresponding to the formula ##STR5## wherein m is 0-50 and X is --CH 2 , ##STR6##
Claim 6
Dependent Claim
18 words
The resin product of claims 2 or 3, wherein component (b) in the diglycidyl ether of bisphenol A.
Claim 7
Dependent Claim
15 words
The resin product of claim 1, wherein component (c) is bisphenol F, A or S.
Claim 8
Dependent Claim
12 words
The resin product of claim 5, wherein component (c) is bisphenol A.
Claim 9
Dependent Claim
18 words
The resin product of claim 1, wherein component (a) is present in a concentration of 65-75%, by weight.
Claim 10
Dependent Claim
26 words
The resin product of claim 6, wherein component (c) is present in a concentration of 5-12%, based on the total weight of components (a) and (b).
Claim 11
Dependent Claim
36 words
The resin product of claim 1 comprising the reaction product of 70 parts epoxy cresol novolac, 30 parts of the diglycidylated ether of bisphenol A and 11 parts of bisphenol A, all parts being by weight.
Claim 12
Dependent Claim
36 words
The resin product of claim 1 comprising the reaction product of 70 parts epoxy cresol novolac, 30 parts of the diglycidylated ether of bisphenol A and 9 parts of bisphenol A, all parts being by weight.
Claim 13
Dependent Claim
39 words
The resin product of claim 1 comprising the reaction product of 70 parts of the tetraglycidyl ether of tetra[hydroxyphenyl]ethane, 30 parts of the diglycidylated ether of bisphenol A and 8 parts of bisphenol A, all parts being by weight.
Claim 14
Dependent Claim
22 words
A heat curable composition which comprises the resin product of either of claims 1, 10, 11 or 12 and a hardener therefor.
Claim 15
Dependent Claim
16 words
The cured product obtained from the elevated temperature curing of the curable mixture of claim 13.
Claim 16
Dependent Claim
26 words
A molding composition comprising a resin product of either claims 1, 10, 11 or 12, an inert filler material, a novolac hardener and a curing accelerator.
Claim 17
Dependent Claim
15 words
The molding composition of claim 15, wherein said novolac hardener is a phenol novolac hardener.
Claim 18
Dependent Claim
17 words
The cured molding composition obtained from the elevated temperature curing of the molding composition of claim 15.
References Cited (Backward Citations)
US3367990A
Cited
US3100756A
Cited
US3452116A
Cited
US3488404A
Cited
DE2505345A1
Cited
US4169187A
Cited
US4288565A
Cited
GB2055843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |