US3294865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing of epoxy resins with polycarboxylates, polyhydric phenols or polyhydric alcohols and, as an accelerator, an alkali metal salt
Assignee: Celanese Coatings Co
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Filing: 1965-12-13
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Granted: 1966-12-27
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Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert P Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:04
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
155 words
A HEAT CURABLE COMPOSITION OF MATTER COMPRISING (A) A POLYEPOXIDE HAVING A 1,2 EPOXY EQUIVALENCY GREATER THAN ONE AND AN EPOXIDE EQUIVALENT WEIGHT OF ABOUT 50 TO 40000, (B) A CROSS-LINKING AGENT SELECTED FROM AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF (A) POLYCARBOXYLIC ACIDS, (B) POLYCARBOXYLIC ACID ANHYDRIDES, (C) POLYHYDRIC PHENOLS CONTAINING NO MORE THAN ABOUT 12 PHENOLIC HYDROXYLS PER MOL, AND (D) POLYHYDRIC ALCOHOLS IN ADMIXTURE IN A RATIO OF 0.5 TO 1 EQUIVALENT OF THE ACIDS AND ANHYDRIDES PER EPOXIDE EQUIVALENT OF THE POLYEPOXIDE AND 0.1 TO 1 EQUIVALENT OF THE PHENOLS AND ALCOHOLS PER EPOXIDE EQUIVALENT OF THE POLYEPOXIDE, AND (C) AS A CURING ACCELERATOR, FROM 0.05 TO 1 WEIGHT PERCENT BASED ON THE TOTAL WEIGHT OF THE POLYPOXIDE AND CROSS-LINKING AGENT WEIGHT OF THE POLYPOXIDE LEAST ONE MEMBER OF THE GROUP CONSISTING OF (A) SODIUM, POTASSIUM, LITHIUM AND AMMONIUM BROMIDES, IODIDES, AND THIOCYANATES, AND (B) LITHIUM AND AMMONIUM CHLORIDES,
Claim 2
Dependent Claim
155 words
A HEAT CURABLE COMPOSITION OF MATTER COMPRISING (A) A POLYEPOXIDE HAVING A 1,2 EPOXY EQUIVALENCY GREATER THAN ONE AND AN EPOXIDE EQUIVALENT WEIGHT OF ABOUT 50 TO 40000, (B) A CROSS-LINKING AGENT SELECTED FROM AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF (A) POLYCARBOXYLIC ACIDS, (B) POLYCARBOXYLIC ACID ANHYDRIDES, (C) POLYHYDRIC PHENOLS CONTAINING NO MORE THAN ABOUT 12 PHENOLIC HYDROXYLS PER MOL, AND (D) POLYHYDRIC ALCOHOLS IN ADMIXTURE IN A RATIO OF 0.5 TO 1 EQUIVALENT OF THE ACIDS AND ANHYDRIDES PER EPOXIDE EQUIVALENT OF THE POLYEPOXIDE AND 0.1 TO 1 EQUIVALENT OF THE PHENOLS AND ALCOHOLS PER EPOXIDE EQUIVALENT OF THE POLYEPOXIDE, AND (C) AS A CURING ACCELERATOR, FROM 0.05 TO 1 WEIGHT PERCENT BASED ON THE TOTAL WEIGHT OF THE POLYPOXIDE AND CROSS-LINKING AGENT WEIGHT OF THE POLYPOXIDE LEAST ONE MEMBER OF THE GROUP CONSISTING OF (A) SODIUM, POTASSIUM, LITHIUM AND AMMONIUM BROMIDES, IODIDES, AND THIOCYANATES, AND (B) LITHIUM AND AMMONIUM CHLORIDES,
Claim 3
Dependent Claim
37 words
THE COMPOSITON OF CLAIM 1 WHEREIN THE POLYPOXIDE IS A GLYCIDYL POLYETHER OF A POLYHYDRIC PHENOL, WHEREIN THE ACID IS A COPOLYMER OF ACRYLIC ACID, ETHYL ACRYLATE AND VINYL TOLUENE AND WHEREIN THE SALT IS POTASSIUM THIOCYANATE.
References Cited (Backward Citations)
US3006892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |