Curable compositions containing 1,3-dialkylimidazole-2-thione ca

Details Curable compositions containing 1,3-dialkylimidazole-2-thione ca Curable compositions containing 1,3-dialkylimidazole-2-thione ca

1991-02-19

1992-02-25

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528109, 528117, 525112, 525117, 525119, 525207, 525208, 5253273, 525118, 525221, C08F 800, C08G 5968, C08G 6510

Patent

active

050914987

ABSTRACT:
The present invention describes the use of 1,3-dialkylimidazole-2-thiones as a catalyst for epoxy/anhydride reactions (and other reactions) and a method of making these catalysts. Epoxy/anhydride coatings containing these improved catalysts offer the following advantages: improved appearance (especially since even weeks after application the coatings still have a "wet" look); better pot-life; improved resistance to alkaline substances which will improve durability; improved solubility; and coatings which have a reduced volatile organic content (VOC).

REFERENCES:
patent: 4816500 (1989-03-01), Corcoran
patent: 4906677 (1990-03-01), Barsotti et al.
patent: 4908397 (1990-03-01), Barsotti et al.
patent: 5017435 (1991-05-01), Barsotti et al.
Organic Syntheses, 1986, vol. 64, p. 92.

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