Linerless thermally-responsive record material
US9199503B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2014 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Jun 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2003/0211
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.