Heat stable, non-yellowing photopolymer compositions
AssigneeW. R. Grace & Co.
InventorJoseph D. Moyer
Life of this patent
Estimating the term…
Abstract
This invention relates to heat stable, non-yellowing photopolymer compositions comprising a polythiol, a photoinitiator and a polyene of the formula: ##STR1## wherein R are all the same member of the group consisting of ##STR2## R.sub.1 is --CH.sub.3 or R, and R' is --CH.sub.3 or H. The UV cured coating resulting from this composition are non-yellowing even after baking for 15 minutes at 450.degree. F.
Claims2
The process of forming a non-yellowing, cured polythioether heat stable at 450.degree. F. for at least 15 minutes which comprises admixing a composition comprising a polythiol, a photoinitiator and a polyene of the formula:
- ##STR21## wherein R are all the same member of the group consisting of ##STR22## R.sub.1 is --CH.sub.3 or R, and R' is --CH.sub.3 or H and thereafter exposing said composition to UV radiation.
The process of forming a non-yellowing coating on a substrate said coating being heat stable at 450.degree. F. for at least 15 minutes which comprises applying to the substrate a layer of a photocurable composition comprising a polythiol, a photoinitiator and a polyene of the formula:
- ##STR23## wherein R are all the same member of the group consisting of ##STR24## R.sub.1 is --CH.sub.3 or R, and R' is --CH.sub.3 or H and thereafter exposing said composition to UV radiation.
Dependencies are inferred from the claim text.