Aqueous Resin Composition and Method of Producing the Same

Abstract

A polyolefin wax-containing aqueous resin composition that can provide excellent properties without the use of a surfactant is provided. The aqueous resin composition is obtained by heating and dissolving 100 parts by mass of a carboxyl group-containing polyolefin wax in the presence of 15 to 67 parts by mass of a compound that satisfies general formula (1) shown below, and 90 to 380 parts by mass of water, and then dispersing this with a basic compound that has been added at a ratio of 1 to 4 chemical equivalents per carboxyl group of the carboxyl group-containing polyolefin wax. C m H 2m+1 —(OCH 2 CH 2 ) n —OH  General Formula (1) m: an integer from 4 to 6, n: an integer from 1 to 4

1 . An aqueous resin composition,
 formed by heating and dissolving 100 parts by mass of a carboxyl group-containing polyolefin wax in the presence of 15 to 67 parts by mass of a compound that satisfies general formula ( 1 ) shown below, and 90 to 380 parts by mass of water, and then dispersing this with a basic compound that has been added at a ratio of 1 to 4 chemical equivalents per carboxyl group of the carboxyl group-containing polyolefin wax.
   C m H 2m+1 —(OCH 2 CH 2 ) n —OH  General Formula (1) 
   
       m: an integer from 4 to 6, n: an integer from 1 to 4 
     
     
         2 . The aqueous resin composition according to  claim 1 ,
 wherein the carboxyl group-containing polyolefin wax is an acid-modified polyolefin wax obtained by graft-copolymerization of at least one species selected from α,β-unsaturated carboxylic acids and anhydrides thereof in an amount of 10 to 110 mgKOH/g with an olefin wax.   
     
     
         3 . The aqueous resin composition according to  claim 1 ,
 wherein the carboxyl group-containing polyolefin wax has an acid value of 10 to 110 mgKOH/g through oxidation treatment of a polyolefin wax.   
     
     
         4 . The aqueous resin composition according to  claim 1 ,
 wherein the carboxyl group-containing polyolefin wax has a melt viscosity at 170° C. of not more than 30,000 mPa·s.   
     
     
         5 . A method of producing an aqueous resin composition by heating and dissolving 100 parts by mass of a carboxyl group-containing polyolefin wax in the presence of 15 to 67 parts by mass of a compound that satisfies general formula (1), and 90 to 380 parts by mass of water, and then adding a basic compound at a ratio of 1 to 4 chemical equivalents per carboxyl group of the carboxyl group-containing polyolefin wax.