| abstract |
The present invention relates to curable photochromic compositions which include an at least di-functional oxazoline functional material, an at least di-functional first carboxylic acid functional material, an optional second carboxylic acid functional material having at least three carboxylic acid groups, which optionally includes a carboxylic acid functional polymer, and a photochromic compound. The curable photochromic compositions have an equivalents ratio of oxazoline equivalents of the oxazoline functional material to a total carboxylic acid equivalents of the first and optional second carboxylic acid functional materials of from 0.5:1 to 10:1 when the second carboxylic acid functional material is not present, and from 0.5:1 to 3:1 when the second carboxylic acid functional material is present. The present invention, more particularly, relates to curable photochromic adhesive compositions, and curable photochromic coating compositions. |