Radiation curable resin composition and method therefor

A method for production of a radiation curable resin composition including the aprotic ammonium salt group shown by chemical formula:

• ##STR9## in the amount of 0.1 to 4.0 mol/kg, the method comprising the steps of:
• forming a quaternary ammonium group by reacting monocarboxylic acid (B) having at least one polymerizable unsaturated double bond with a copolymer (A) which is prepared by copolymerizing a compound (D) having unsaturated double bonds and a tertiary amino group and a compound (E) having polymerizable unsaturated double bonds that are copolymerizable with said compound (D);
• and
• reacting a monoepoxy compound (C) with said quaternary ammonium group;
• wherein, X is an organic group which is bound to the main chain and includes a hydrocarbon containing up to 3 carbon atoms, an ester, or an amide;
• R1 and R2 which may be the same or different, represent a hydrocarbon of 1 to 8 carbon atoms and said hydrocarbon may be substituted with a hydroxyl group, ester group, alkoxy group, or a halogen atom, where R1 and R2 may bond together, with bonding occurring between the nitrogen atom and R1 and R2 to form a heterocyclic ring;
• R3 indicates a hydrocarbon of 1 to 18 carbon atoms having one or more polymerizable unsaturated double bonds and may be substituted with a hydroxyl group, ester group, alkoxy group, or halogen atom;
• and
• R4, R5 and R6, which may be the same or different, represent a hydrogen atom or a hydrocarbon of 1 to 18 carbon atoms ›and a hydrogen atom of R4, R5 and R6! which may be substituted with a hydroxyl group, ester group, alkoxy group, or halogen atoms, wherein R5 and R6 may bond together to form a ring.

A method for production of a radiation curable resin composition including the aprotic ammonium salt group shown by chemical formula:

• ##STR10## in the amount of 0.1 and 4.0 mol/kg and an ether group generated by a reaction between an alcoholic hydroxyl group and a glycidyl group, the method comprising the steps of:
• forming a quaternary ammonium group by reacting a monocarboxylic acid (B) with at least one polymerizable unsaturated double bond with a copolymer (A) which has an amino group, copolymer (A) being a copolymer of a compound (D), which has polymerizable unsaturated double bonds and a tertiary amino group, and a compound (F), which has an alcoholic hydroxyl group and polymerizable double bonds which are copolymerizable with compound (D), and/or being a copolymer of compound (D), compound (F) and a compound (E) which has polymerizable unsaturated double bonds that are copolymerizable with compound (D) and compound (F);
• and
• reacting a monoepoxy compound with said quaternary ammonium group and the alcoholic hydroxyl group;
• wherein, X is an organic group which is bound to the main chain;
• and includes a hydrocarbon of 1 to 3 carbon atoms, an ester, or an amide;
• R1 and R2 which may be the same or different, represent a hydrocarbon of 1 to 8 carbon atoms and said hydrocarbon may be substituted with a hydroxyl group, ester group, alkoxy group, or a halogen atom, wherein R1 and R2 may bond together, with bonding occurring between the nitrogen atom and R1 and R2 to form a heterocyclic ring;
• R3 indicates a hydrocarbon of 1 to 18 carbon atoms that has one or more polymerizable unsaturated double bonds and may be substituted with a hydroxyl group, ester group, alkoxy group or halogen atom;
• and
• R4, R5 and R6, which may be the same or different, represent a hydrogen atom or a hydrocarbon of 1 to 18 carbon atoms, which may be substituted with a hydroxyl group, ester group, alkoxy group or halogen atoms, wherein R5 and R6 may bond together to form a ring.