| 摘要 |
Processes are provided for preparing compositions useful in photopolymerizable compositions, which processes comprise:… A. reacting a polyether diol and an acrylic or alkylacrylic acid in substantially equal molar proportions; and… B. 1. reacting a polyether diol and an acrylic or alkylacrylic acid in substantially equal molar proportions and… 2. reacting the product of step B1, a hydroxyalkyl acrylate and an organic diisocyanate in substantially equal molar proportions. |
