Appvion, Inc.

Appvion Operations, Inc.

Yves Defrenne

Mark Robert Fisher

Fadi Chakar

Lei Xu

The present invention is directed to a composition and method of providing a silicone release coating material for a thermally-responsive record material while maintaining strong printability with UV inks and water based inks, as well as scuff resistance. The thermally-responsive record material includes a substrate with first and second surfaces. The first surface includes a heat sensitive coating having a colorless dye precursor and an acidic developer material in contiguous relationship. The release coating is provided with an aqueous mixture of a water soluble or water dispersible polymeric material, a silicone release agent, an excess of platinum catalyst, and a hydrophilic silica. The platinum catalyst is preferably provided in excess of 150 ppm. The hydrophilic silica is preferably fumed silica. The release coating is cured at a temperature of 160&#xb0; C. or less, or even from 70&#xb0; C. to 120&#xb0; C.

Printable and scuff resistant silicone release coating for linerless thermally-responsive record material

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&#xb0; C., or even from 70&#xb0; to 120&#xb0; C. to a scuff resistant hardness and without visible background discoloration of the first layer.

Linerless thermally-responsive record material

The invention describes a thermally-responsive record material substantially free of aromatic isocyanate. The record material comprises a support having provided thereon a heat-sensitive composition comprising a substantially colorless dye precursor comprising a fluoran; and a developer material selected from the group consisting of 4,4'-diaminodiphenylsulfone and 3,3&#x2032;-diaminodiphenylsulfone in combination with N-[(butylamino)carbonyl]-4-methylbenzene sulfonamide, which upon being heated react with said dye precursor to develop color, and including a binder material.

Growing community of inventors

Appleton, WI, United States of America

Yves Defrenne