US3864426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal shock resistant epoxy compositions
Assignee: Union Carbide Corp
•
Filing: 1973-05-23
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Granted: 1975-02-04
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Expires: 1993-05-23
Abstract
Abstract Cured epoxy compositions having improved thermal shock resistance are produced from a glycidyl epoxy resin, an epoxy hardener, and an acrylic polymer mixture.
Inventors
- 👤 George A Salensky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A CURED ARTICLE HAVING GOOD THERMAL SHOCK RESISTANCE, SAID ARTICLE COMPRISING THE MOLDED REACTION PRODUCT OF A SOLID COMPOSTION, FUSIBLE AT ELEVATED TEMPERATURES AND SUITABLE FOR USE IN MOLDING, CONTAINING (A) A POLYGLYCIDYL ETHER OF A POLYHYDRIC PHENOL, HAVING AN OXIRANE OXYGEN EQUIVALENCY GREATER THAN ONE, (B) AN EPOXY CURING AGENT AND (C) AN ACRYLIC GRAFT COPOLYMER COMPRISING AN AKYL METHACRYLATE POLYMER AND AN ALKYL ACRYLATE POLYMER, SAID ALKYL METHACRYLATES POLYMER HAVING BEEN POLYMERIZED IN INTIMATE CONTACT WITH SAID ALKYL A RYLATE POLYMER, WHEREIN THE ACRYLIC GRAFT COPOLYMER CONTAINS FROM 40 TO 75 WEIGHT PERCENT OF ALKYL ACRYLATE AND FROM 60 TO 25 WEIGHT PERCENT OF ALKYL METHACRYLATE, THE PERCENTAGE BEING BASED ON WEIGHT OF SAID ACRYLIC GRAFT COPOLYMER.
Claim 2
Dependent Claim
119 words
A CURED ARTICLE HAVING GOOD THERMAL SHOCK RESISTANCE, SAID ARTICLE COMPRISING THE MOLDED REACTION PRODUCT OF A SOLID COMPOSTION, FUSIBLE AT ELEVATED TEMPERATURES AND SUITABLE FOR USE IN MOLDING, CONTAINING (A) A POLYGLYCIDYL ETHER OF A POLYHYDRIC PHENOL, HAVING AN OXIRANE OXYGEN EQUIVALENCY GREATER THAN ONE, (B) AN EPOXY CURING AGENT AND (C) AN ACRYLIC GRAFT COPOLYMER COMPRISING AN AKYL METHACRYLATE POLYMER AND AN ALKYL ACRYLATE POLYMER, SAID ALKYL METHACRYLATES POLYMER HAVING BEEN POLYMERIZED IN INTIMATE CONTACT WITH SAID ALKYL A RYLATE POLYMER, WHEREIN THE ACRYLIC GRAFT COPOLYMER CONTAINS FROM 40 TO 75 WEIGHT PERCENT OF ALKYL ACRYLATE AND FROM 60 TO 25 WEIGHT PERCENT OF ALKYL METHACRYLATE, THE PERCENTAGE BEING BASED ON WEIGHT OF SAID ACRYLIC GRAFT COPOLYMER.
Claim 3
Dependent Claim
12 words
The cured article of claim 1 wherein said polyhydric phenol is 2,2-bis(4-hydroxyphenyl)propane.
Claim 4
Dependent Claim
15 words
The cured article of claim 1 wherein said epoxy curing agent is an aromatic amine.
Claim 5
Dependent Claim
17 words
The cured article of claim 1 wherein said molded reaction product is adhered to a metal article.
Claim 6
Dependent Claim
17 words
The cured article of claim 2 wherein said molded reaction product is adhered to a metal article.
Claim 7
Dependent Claim
17 words
The cured article of claim 3 wherein said molded reaction product is adhered to a metal article.
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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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |