Printable release coatings and stamp constructions

Details Printable release coatings and stamp constructions Printable release coatings and stamp constructions

C - Chemistry, Metallurgy

08

G

C08G 77/26 (2006.01) B32B 9/00 (2006.01) B41M 5/52 (2006.01) B42D 15/00 (2006.01) C08G 18/08 (2006.01) C08G 18/61 (2006.01) C09D 175/04 (2006.01) C09D 183/10 (2006.01) G09F 3/00 (2006.01) B41M 5/00 (2006.01)

Patent

CA 2364015

Ink-imprintable compositions comprise a reaction product of a mixed emulsion containing a carboxylic acid terminated polydimethylsiloxane, or an isocyanate terminated polydimethylsiloxane, a hydrophilic isocyanate reactive agent, a polyisocyanate, and at least one dihydroxy terminated oligomer. Ink- imprintable stamp constructions also comprise a plurality of contiguous stamps in a roll or stacked sheet configuration without an independent release liner wherein the stamps have a pressure-sensitive adhesive on the back surface of the stamps and the above ink-imprintable release coating on the face surface of the stamps.

Des compositions imprimables à l'encre sont constituées d'un produit de réaction d'une émulsion mélangée contenant un polydiméthylsiloxane à terminaison acide carboxylique, ou un polydiméthylsiloxane à terminaison isocyanate, un agent réactif hydrophile à l'isocyanate, un polyisocyanate et au moins un oligomère à terminaison dihydroxy. Des constructions de timbres imprimables à l'encre comprennent également plusieurs timbres contigus en rouleau ou en feuilles empilées sans support anti-adhésif indépendant, un adhésif sensible à la pression étant appliqué sur l'endos des timbres et un revêtement anti-adhésif imprimable à l'encre étant prévu sur la face des timbres.

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