Solid vinyl ether terminated urethane curing agent

Details Solid vinyl ether terminated urethane curing agent Solid vinyl ether terminated urethane curing agent

1997-12-16

2000-02-22

Sergent, Rabon

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

526301, 528 49, 528 59, 528 73, 528 75, 544193, 544222, 560158, C07C26902, C07C27124, C07D25134, C08G 1804

Patent

active

060282126

ABSTRACT:
Solid vinyl ether terminated curing agents for powder coatings can be prepared by reacting an aliphatic diisocyanate with a polyol and then with a hydroxy vinyl ether, or by reacting an aliphatic polyisocyanate with a hydroxy vinyl ether. Powder coatings based on the so prepared curing agents are extremely useful for coating heat sensitive substrates by exposure to ultraviolet light, heat, or both.

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CDC Alert, Preventing Asthma and Death from Diisocyarate Exposure, DHHS (NIOSH) Publication No. 96-111 (1996).
Myer, H.Everett, et al., A Survey of Airborne HDI, HDI-Based Polyisocyanate and Solvent Concentrations in the Manufacture of Polyurethane Coatings, Am. Ind. Hyg. Assoc. J. 54 (11): 663-670 (1993).

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