US4161575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for epoxy powder coatings
Assignee: Air Products and Chemicals Inc
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Filing: 1978-10-12
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Granted: 1979-07-17
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Expires: 1998-10-12
Abstract
Abstract This invention relates to a catalyst system comprising a triethylene diamine salt of thiocyanic acid for epoxy powder coatings, the epoxy compound having a lower softening point of not less than 40° C. The catalysts for these coatings have latent activity in that they remain substantially inactive during mixing and extruding, but are highly effective at the cure temperatures.
Inventors
- 👤 John P. Seymour
- 👤 Rocco L. Mascioli
- 👤 Burton D. Beitchman
- 👤 Philip J. Zaluska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:49
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/687
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
In a process for curing a finely divided 1-2-epoxy resin having a lower softening point of not less than 40° C. by heating said epoxy resin to an elevated temperature in the presence of a catalyst, the improvement which comprises heating said epoxy resin in the presence of a triethylene diamine salt of thiocyanic acid.
Claim 2
Dependent Claim
55 words
In a process for curing a finely divided 1-2-epoxy resin having a lower softening point of not less than 40° C. by heating said epoxy resin to an elevated temperature in the presence of a catalyst, the improvement which comprises heating said epoxy resin in the presence of a triethylene diamine salt of thiocyanic acid.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein said salt is included in a proportion of 2 to 10 parts by weight per 100 parts of epoxy resin.
Claim 4
Dependent Claim
23 words
The process of claim 2 wherein said salt is included in a proportion of from 3-5 parts per 100 parts of epoxy resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |