Patent ID: 6716793
Filing Date: 2004-04-06
Classification: B41M,Y10T

Abstract:
An image-recording composition capable of rapidly developing a color at a temperature of 40 to 95Â° C. comprising:a microcapsule enclosing a leuco-dye in an oil; a phenol color-developing agent having four or more phenol groups and a number-average molecular weight (Mn) of 600 to 50,000; and a reaction-accelerating agent catalyzing a color-developing reaction between said leuco-dye and said phenol color-developing agent, said reaction-accelerating agent being an organic compound having at least two carboxyl groups, wherein the ratio of [the number of said carboxyl groups of said reaction-accelerating agent]/[the number of carbon atom(s) of said reaction-accelerating agent other than carbon atoms forming said carboxyl groups] is 0.2 or more, and the concentration of said reaction-accelerating agent being 0.3 part by weight or less based on 1 part by weight of said phenol color-developing agent.