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US 5,635,331 AGranted
Substrate and a color proofing article having release agent/adhesive mixture coated thereon
AssigneeMinnesota Mining and Manufacturing Company
InventorsSteven L. Kangas, Charles W. Graves, Ramesh C. Kumar
Life of this patent
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Abstract
Blocking is substantially reduced between individual sheets having a thermal adhesive coated thereon by including a release agent with the thermal adhesive. Preferred release agents are materials which have previously been used as low-adhesion backsize (LAB) coatings in pressure-sensitive adhesive applications.
Claims26
A coated substrate having a coating thereon which comprises a mixture of:
- a) a thermal adhesive having a glass transition temperature ranging from about -10.degree. to about 60.degree. C.;
- and b) a release agent selected from the group consisting of (1) copolymers having at least one vinyl polymeric segment and at least one siloxane polymeric segment and (2) copolymers derived from ethylenically-unsaturated fluoroalkyl-containing monomers.
A color proofing artide comprising, in the following order:
- a) a carrier layer;
- b) a color layer;
- and
- c) an adhesive layer comprising a thermal adhesive and a release agent,
- wherein said thermal adhesive has a glass transition temperature ranging from about -10.degree. to about 60.degree. C. and said release agent is selected from the group consisting of (1) copolymers having at least one vinyl polymeric segment and at least one siloxane polymeric segment, and (2) copolymers derived from ethylenically-unsaturated fluoroalkyl-containing monomers.
2 more elements
Dependencies are inferred from the claim text.