Pressure-sensitive adhesive articles for use on transparent imaging films
AssigneeArkwright Incorporated
InventorYongzhong Wang
Life of this patent
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Abstract
This invention provides a pressure-sensitive adhesive article, such as a tape, comprising a backing and a pressure-sensitive adhesive coating. The adhesive coating comprises microspheres chemically bonded to a cross-linked polymer network. The adhesive coating is prepared from a mixture comprising a multifunctional aziridine cross-linking agent; a microsphere adhesive having carboxylic acid functional groups; and a binder adhesive having carboxylic acid functional groups. The cross-linked adhesive polymer network provides high cohesive strength and microspheres in the adhesive provide a method of controlling the peel strength. The pressure-sensitive adhesive tapes are particularly suitable for use on transcript imaging films, where they can be cleanly removed from the film.
Claims11
A pressure-sensitive adhesive article comprising a backing material coated with a pressure-sensitive adhesive coating comprising microspheres chemically bonded to a cross-linked polymer network, wherein the pressure-sensitive adhesive coating is prepared from a mixture, comprising:
- a) about 0.001 to about 2% by solid weight of a multifunctional aziridine cross-linking agent;
- b) about 30 to about 80% by solid weight of a microsphere adhesive having carboxylic acid functional groups;
- and
- c) about 20 to about 70% by solid weight of binder adhesive having carboxylic acid functional groups, and a portion of the microspheres protrude from the adhesive coating.
A transparent imaging polyester film, comprising at least one surface coated with an ink-receptive coating, wherein a pressure-sensitive adhesive article is adhered to a surface of the film by means of an adhesive coating comprising microspheres chemically bonded to a cross-linked polymer network, and wherein the adhesive coating is prepared from a mixture, comprising:
- a) about 0.001 to about 2% by solid weight of a multifunctional aziridine cross-linking agent;
- b) about 30 to about 80% by solid weight of a microsphere adhesive having carboxylic acid functional groups;
- and
- c) about 20 to about 70% by solid weight of binder adhesive having carboxylic acid functional groups;
- and a portion of the microspheres protrude from the adhesive coating.
A transparent polyester imaging film, comprising at least one surface coated with a toner-receptive coating, wherein a pressure-sensitive adhesive article is adhered to a surface of the film by means of an adhesive coating comprising microspheres chemically bonded to a cross-linked polymer network, and wherein the adhesive coating is prepared from a mixture, comprising:
- a) about 0.001 to about 2% by solid weight of a multifunctional aziridine cross-linking agent;
- b) about 30 to about 80% by solid weight of a microsphere adhesive having carboxylic acid functional groups;
- and
- c) about 20 to about 70% by solid weight of binder adhesive having carboxylic acid functional groups;
- and a portion of the microspheres protrude from the adhesive coating.
Dependencies are inferred from the claim text.