Aqueous alkaline developable, uv curable urethane acrylate...

Details Aqueous alkaline developable, uv curable urethane acrylate... Aqueous alkaline developable, uv curable urethane acrylate...

C - Chemistry, Metallurgy

08

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96/43, 260/469

C08L 39/00 (2006.01) C08F 220/36 (2006.01) C08F 299/06 (2006.01) C08G 18/42 (2006.01) C08G 18/68 (2006.01) C08G 18/81 (2006.01) G03F 7/035 (2006.01) H05K 3/28 (2006.01)

Patent

CA 1255692

AQUEOUS ALKALINE DEVELOPABLE, UV CURABLE URETHANE ACRYLATE COMPOUNDS AND COMPOSITIONS USEFUL FOR FORMING SOLDER MASK COATINGS ABSTRACT OF THE INVENTION A W curable, aqueous alkaline developable, urethane acrylate composition characterized by: a) 40-70% by weight of (i) a urethane acrylate compound which is obtained by reacting substan- tially equal molar quantities of an aliphatic or cycloaliphatic diisocyanate, and a hydroxyalkyl acrylate, with a polyol having at least three hydroxyl groups, and at least one mole of a dicarboxylic acid anhydride per mole of said polyol; or (ii) a mixture of 20-99 wt. % of said urethane acrylate and 1-80 wt. % of a urethane diacrylate, made by reacting a diisocyanate with 2 moles of a hydroxyalkyl acrylate; b) 20-50% of a reactive monomer diluent; c) 0.5-10% of a photoinitiator; and d) 0-8% of triphenylphosphite.

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