Amphoteric amino sulfonate derivatives of epoxy resins

Claim 2

A water-dispersible modified epoxy resin composition having at least one terminal amphoteric amino sulfonate group of the formula: ##STR5## wherein R 1 and R 2 are hydrogen or methyl, R 3 is hydrogen or C 1 -C 20 alkyl optionally substituted with higher alkylsulfinyl or higher alkanoyloxy, and R 4 is C 1 -C 6 alkylene optionally substituted with 2-hydroxyethyl, said composition being a reaction product of an epoxy resin having a plurality of terminal groups of the formula: ##STR6## wherein R 1 and R 2 are as defined, with an amino sulfonate of the formula: R.sub.3 --NH--R.sub.4 --SO.sub.3 M wherein R 3 and R 4 are as defined, and M is a cation, with removal of said cation.

Claim 3

A water-based liquid epoxy resin composition comprising an aqueous basic medium and, dispersed in said medium, the modified epoxy resin composition of claim 1.

Claim 4

A water-based coating composition comprising the liquid epoxy resin composition of claim 2 in combination with an aminoplast resin.

Claim 5

The water-based coating composition of claim 3 wherein said aminoplast resin methylolmelamine or a lower alkyl ether of methylolmelamine.

Claim 6

A soap-free, polymeric emulsion comprising a dispersed phase consisting of finely divided particles of a film-forming polymer of ethylenically unsaturated unit monomers, and an aqueous continuous phase containing the modified epoxy resin composition of claim 1.

Claim 7

An emulsion type coating composition comprising a polymeric emulsion in combination with an aminoplast resin; wherein said polymeric emulsion is a soap-free polymeric emulsion comprising a dispersed phase of finely divided particles of a film-forming polymer of ethylenically unsaturated unit monomers, and an aqueous continuous phase containing a water-dispersible modified epoxy resin composition having at least one terminal amphoteric amino sulfonate group of the formula: ##STR7## wherein R 1 and R 2 are hydrogen or methyl, R 3 is hydrogen or C 1 -C 20 alkyl optionally substituted with higher alkylsulfinyl or higher alkanoyloxy, and R 4 is C 1 -C 6 alkylene optionally substituted with 2-hydroxyethyl, said composition being a reaction product of an epoxy resin having a plurality of terminal groups of the formula: ##STR8## wherein R 1 and R 2 are as defined, with an amino sulfonate of the formula: R.sub.3 --NH--R.sub.4 --SO.sub.3 M wherein R 3 and R 4 are as defined, and M is a cation, with removal of said cation.

Claim 8

An emulsion type coating composition comprising a polymeric emulsion in combination with an aminoplast resin; wherein said polymeric emulsion is a soap-free polymeric emulsion comprising a dispersed phase of finely divided particles of a film-forming polymer of ethylenically unsaturated unit monomers, and an aqueous continuous phase containing a water-dispersible modified epoxy resin composition having at least one terminal amphoteric amino sulfonate group of the formula: ##STR7## wherein R 1 and R 2 are hydrogen or methyl, R 3 is hydrogen or C 1 -C 20 alkyl optionally substituted with higher alkylsulfinyl or higher alkanoyloxy, and R 4 is C 1 -C 6 alkylene optionally substituted with 2-hydroxyethyl, said composition being a reaction product of an epoxy resin having a plurality of terminal groups of the formula: ##STR8## wherein R 1 and R 2 are as defined, with an amino sulfonate of the formula: R.sub.3 --NH--R.sub.4 --SO.sub.3 M wherein R 3 and R 4 are as defined, and M is a cation, with removal of said cation.

Claim 9

The emulsion type coating composition of claim 6 wherein said aminoplast resin is methylolmelamine or a lower alkyl ether of methylolmelamine.

Claim 10

The emulsion type coating composition of claim 6 wherein said unit monomer is an acrylate or methacrylate ester of a C 1 -C 12 alkanol, a polymerizable alcohol having an ethylenically unsaturated bond, a polymerizable carboxylic acid, a polymerizable amide, a polymerizable nitrile, a polymerizable aromatic compound, a vinyl ester or a diene.

Claim 11

The water-dispersible modified epoxy resin composition of claim 1 wherein at least 20% of said terminal epoxide groups are converted to said amino sulfonate groups.

Claim 12

The water-dispersible modified epoxy resin composition of claim 9 wherein said aminosulfonate is taurinate, an N-(C 1 -C 20 alkyl)taurinate or 6-aminohexane-1-sulfonate.

Claim 13

The water-dispersible modified epoxy resin composition of claim 1 wherein said epoxy resin is a diglycidyl ether derived from a polyhydric phenol or a polyhydric alcohol.