Heat transfer printing
First Claim
1. A transfer sheet comprising a substrate sheet and a coloring layer provided thereon, the coloring layer containingfrom about 1 to about 80 weight percent of a coloring agent comprising at least one of carbinol bases of basic dyes and their derivatives, wherein each of said derivatives is the product of the reaction between a corresponding basic dye and an alcoholate, and said coloring agent is sublimable at a temperature between about 80°
- C. and about 250°
C.;
from about 1 to about 80 weight percent of a strong base, wherein the mole ratio of said strong base to said coloring agent is between about 1;
1 to about 40;
1; and
the remainder a binder, wherein all weight percents are based on the total weight of said coloring layer.
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Accused Products
Abstract
An ink composition for heat transfer printing comprising at least one of carbinol bases of basic dyes or their derivatives, a strong base, a binder and a solvent for dissolving the binder. This ink composition is excellent in storage stability because it contains a carbinol base of a basic dye or its derivative in isolated form as a coloring agent along with a strong base. By using this ink composition, a transfer sheet having high storage stability can be obtained.
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Citations
16 Claims
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1. A transfer sheet comprising a substrate sheet and a coloring layer provided thereon, the coloring layer containing
from about 1 to about 80 weight percent of a coloring agent comprising at least one of carbinol bases of basic dyes and their derivatives, wherein each of said derivatives is the product of the reaction between a corresponding basic dye and an alcoholate, and said coloring agent is sublimable at a temperature between about 80° - C. and about 250°
C.;from about 1 to about 80 weight percent of a strong base, wherein the mole ratio of said strong base to said coloring agent is between about 1;
1 to about 40;
1; andthe remainder a binder, wherein all weight percents are based on the total weight of said coloring layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- C. and about 250°
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12. A heat transfer printing process which comprises:
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superposing a transfer sheet comprising a substrate sheet and a coloring layer of a desired pattern provided on the substrate sheet, the coloring layer containing from about 1 to about 80 weight percent of a coloring agent comprising at least one of carbinol bases of basic dyes and their derivatives, wherein each of said derivatives is the product of the reaction between a corresponding basic dye and an alcoholate, and said coloring agent is sublimable at a temperature between about 80°
C. and about 250°
C.;
from about 1 to about 80 weight percent of a strong base, wherein the mole ratio of said strong base to said coloring agent is between about 1;
1 to about 40;
1; and
the remainder a binder, wherein all weight percents are based on the total weight of said coloring layer,on a transfer receiving base material consisting of a fiber dyeable with cationic dyes in such a manner that the surface of the transfer sheet provided with the coloring layer contacts the base material to form a superposed structure; and maintaining the superposed structure under heat, at a temperature sufficient to sublime said coloring agent, and pressure. - View Dependent Claims (13, 14, 15, 16)
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Specification