Photocopolymerizable compositions based on epoxy and hydroxyl-containing organic materials having primary hydroxyl content
First Claim
1. A photocopolymerizable composition having an improved cure rate and when cured resistivity to water comprising a cycloaliphatic epoxide having at least two epoxy groups, a propylene oxide polyol capped with ethylene oxide, which reacts with said epoxide, and a photoinitiator, said capped propylene oxide polyol having an average equivalent weight of about 1439 to about 2078 and an average hydroxyl number of about 27 to about 35.
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Abstract
This invention is directed to photocopolymerizable compositions comprising an epoxide containing two or more epoxy groups, a poly (active hydrogen) organic compound having at least some primary hydroxyl content and a photoinitiator. The cured coating compositions exhibit fast cure rates, good water resistance and can have utility as automotive finishes, can finishes, appliance finishes, general metal finishes, printing inks, adhesives and the like.
39 Citations
15 Claims
- 1. A photocopolymerizable composition having an improved cure rate and when cured resistivity to water comprising a cycloaliphatic epoxide having at least two epoxy groups, a propylene oxide polyol capped with ethylene oxide, which reacts with said epoxide, and a photoinitiator, said capped propylene oxide polyol having an average equivalent weight of about 1439 to about 2078 and an average hydroxyl number of about 27 to about 35.
Specification