BESCHICHTUNGSZUSAMMENSETZUNGEN

摘要

PCT No. PCT/GB96/00861 Sec. 371 Date Jan. 14, 1998 Sec. 102(e) Date Jan. 14, 1998 PCT Filed Apr. 4, 1996 PCT Pub. No. WO96/31806 PCT Pub. Date Oct. 10, 1996A photopolymerizable material is provided that is suitable for use in the production of coatings or resists on printed circuit boards, for example The material is an ethylenically unsaturated polymerizable reaction product of a polyepoxide and a mixture of (i) a major proportion of an ethylenically unsaturated carboxylic acid and (ii) a minor. proportion of a saturated aliphatic or aromatic carboxylic acid, the reaction product being further modified by reaction with a dicarboxylic acid or anhydride thereof.