Vinyl chloride-based resin latexes, processes for producing the same, and thermal transfer image-receiving sheet obtained using the same

摘要

A vinyl chloride-based resin latex which froths little when unreacted monomer remaining in the latex are recovered under heat and reduced-pressure conditions, and a thermal transfer image-receiving sheet which has satisfactory water resistance, does not yellow during storage, and gives images having excellent durability and light resistance. The invention provides a vinyl chloride-based resin latex contains a copolymer containing a vinyl chloride and an epoxy-group-containing vinyl or contains vinyl chloride, an epoxy-group-containing vinyl, and a carboxylic acid vinyl ester, wherein a content of the epoxy-group-containing vinyl is 0.1% by weight or more but less than 3% by weight, and wherein the latex contains no surfactant, and has a solid concentration of 25% by weight or more; a process for producing the latex; and a thermal transfer image-receiving sheet obtained using the latex.

主权项

1. A vinyl chloride-based resin latex, comprising a copolymer comprising vinyl chloride and an epoxy-group-comprising vinyl,
wherein: a content of the epoxy-group-comprising vinyl in the copolymer is 0.1% by weight or more but less than 3% by weight; the resin latex comprises no surfactant and has a solid concentration of 25% by weight or more; and the vinyl chloride-based resin latex is produced by a process comprising: polymerizing a vinyl chloride monomer and an epoxy-group-comprising vinyl monomer in the presence of a polymerization initiator in an aqueous medium comprising water and no surfactant, wherein an amount of the epoxy-group-comprising vinyl monomer is 0.1% by weight or more but less than 3% by weight, based on a sum of the vinyl chloride monomer and the epoxy-group-comprising vinyl monomer, wherein a weight ratio of the vinyl chloride monomer and the epoxy-group-comprising vinyl monomer to the water is ⅓ or greater and that part or the whole of the epoxy-group-comprising vinyl monomer is added in portions or continuously to the aqueous medium during the polymerization.