VINYL ALCOHOL POLYMER-CONTAINING COATING AGENT FOR PAPER AND PAPER AND THERMAL PAPER COATED WITH THE COATING AGENT

摘要

A vinyl alcohol polymer-containing coating agent for paper is provided that allows a curing step to be omitted after a paper surface is coated therewith and makes it possible to form a layer (for example, a coating layer or a color developing layer) that is excellent in water resistance and is subjected to less yellowing over time. It is an aqueous composition containing a vinyl alcohol polymer (A) in which the content X of vinyl alcohol units (mol%) and the content Y of ethylene units (mol%) satisfy a formula X+0.2Y>95, where X<99.9 and 0‰¤Y‰¤10, and an addition condensate (B) between ethylene urea and glyoxal in which the content of terminal aldehyde groups per gram of solid content is 1.2 to 3.0 (mmol), wherein the solid content weight ratio between the vinyl alcohol polymer (A) and the addition condensate (B) is in a range of (A):(B) = 99:1 to 50:50.