Patent ID: 6602651
Filing Date: 2003-08-05
Classification: C08G,C08L,G03F

Abstract:
An aqueous solder resist composition comprising:(a) a water-soluble or water-dispersible, photopolymerizable resin containing at least one polymerizable unsaturated group and at least one carboxyl group, the carboxyl group being neutralized with an amine compound; (b) a photoinitiator; (c) an amino resin; and (d) a low reactivity epoxy compound free of an epoxy group represented by the formula â€ƒwherein Y is oxygen or nitrogen; the low reactivity epoxy compound (d) being at least one compound selected from the group consisting of the following compounds (i) and (iii) to (ix): (i) methylglycidyl methacrylate or a polymer or a copolymer thereof; (iii) a compound represented by the formula â€ƒwherein a+b is 10 to 15; (iv) an epoxy compound prepared by epoxidizing an unsaturated fatty acid represented by the following formula or a derivative thereof: R11â€”(CH&boxH;CHCH2)xâ€”(CH2)yâ€”COOR12â€ƒâ€ƒ(7) â€ƒwherein R11 is hydrogen or C1-10 alkyl R12 is hydrogen, C1-10 alkyl aryl, alkenyl, (meth)acryloyol or alkoxysilyl; x and y are each an integer of 1 to 20; and the x groups and the y groups may be bonded to one another in an arbitrary order; (v) an epoxy compound prepared by epoxidizing an unsaturated fatty acid derivative represented by the formula [R13â€”(CH&boxH;CHCH2)mâ€”(CH2)nâ€”COO]pR14â€ƒâ€ƒ(8) â€ƒwherein R13 is C1-10 alkyl; R14 is a polyhydric alcohol residue having a valence of p; p is an integer of 2 to 100; m and n are each an integer of 1 to 20; and the m groups and the n groups may be bonded to one another in an arbitrary order; (vi) an epoxidized polybutadiene; (vii) a compound represented by the formula â€ƒwherein R15 is hydrogen or methyl, and R16 is C1-10 alkylene; or a polymer or copolymer thereof, (viii) a compound represented by the formula â€ƒwherein R17 is hydrogen or methyl, and R18 is C1-10 alkylene; or a copolymer or copolymer thereof; and (ix) a compound represented by the formula â€ƒwherein R19 is hydrogen or methyl, R20 is C1-10 alkylene, R21 is a C1-10 hydrocarbon group, and k is 0 or an integer of 1 to 10; or a polymer or copolymer thereof.