Solid vinyl ether terminated urethane curing agent
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United States of America Patent
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Feb 22, 2000
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N/A
app pub date -
Dec 16, 1997
filing date -
Dec 16, 1997
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Expired
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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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