| 摘要 |
This invention relates to heat stable, non-yellowing photopolymer compositions comprising a polythiol, a photoinitiator and a polyene of the formula: <IMAGE> wherein R are all the same member of the group consisting of <IMAGE> <IMAGE> R1 is -CH3 or R, and R' is -CH3 or H. The UV cured coating resulting from this composition are non-yellowing even after baking for 15 minutes at 450 DEG F.
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