Linerless thermally-responsive record material
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United States of America Patent
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Dec 1, 2015
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app pub date -
Jun 26, 2014
filing date -
Jun 26, 2014
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Abstract
The invention describes a composition and method of providing an improved thermally responsive record material useful for linerless labels. The record material comprises a support having provided thereon on one surface an adhesive material, and on at least one other surface, a heat sensitive imaging coating. The method comprises applying to a first surface a first layer of a coating of a heat sensitive color-forming composition comprising a binder material and a substantially colorless dye precursor and an acidic developer material in substantially contiguous relationship. Over the first layer is applied a release coat overcoating the first layer. The release coat comprises a water soluble or water dispersible polymeric material, a polysiloxane release agent and excess platinum catalyst in excess of 150 ppm based on weight of the second coating. The release coat is cured at a temperature of from at or below 160° C., or even from 70° to 120° C. to a scuff resistant hardness and without visible background discoloration of the first layer.
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