Pressure sensitive adhesives
AssigneeInternational Coatings Limited
InventorAlfred E. Glennon
Life of this patent
Estimating the term…
Abstract
A pressure sensitive adhesive is formed from a composition comprising mono-functional unsaturated acrylate ester monomer, essentially saturated tackifying resin polymer dissolved in the acrylate ester, non-crystallizing elastomeric material also dissolved in the acrylate ester, and an initiator responsive to ultraviolet light or other penetrating radiation such as electron beam, gamma or X-ray radiation. The composition is cured by subjection to ultraviolet light or other radiation, which causes the initiator to induce polymerization of both the acrylate ester and the non-crystallizing elastomeric material, apparently with co-polymerization therebetween.
Claims41
A composition for forming a pressure sensitive adhesive, comprising by weight:
- about 100 parts monofunctional unsaturated acrylate ester monomer;
- between about 50 and 250 parts essentially saturated thermoplastic tackifying resin polymer dissolved in said acrylate ester monomer;
- between about 4 and 150 parts non-crystallizing elastomeric block copolymer dissolved in said acrylate ester monomer;
- and
- initiator responsive to radiation to induce copolymerization of the acrylate ester monomer and the non-crystallizing elastomeric block copolymer.
A composition for forming a pressure sensitive adhesive, comprising by weight:
- about 100 parts tetrahydrofurfuryl acrylate monomer;
- between about 50 and 250 parts essentially saturated tackifying resin polymer dissolved in said tetrahydrofurfuryl acrylate monomer;
- between about 4 and 150 parts non-crystallizing elastomeric block copolymer having styrene blocks and dissolved in said tetrahydrofurfuryl acrylate monomer;
- and
- between about 1 and 6 parts initiator responsive to radiation to induce copolymerization of the tetrahydrofurfuryl acrylate monomer and the non-crystallizing elastomeric block copolymer.
The process of forming a pressure sensitive adhesive that comprises:
- providing a composition including, by weight, about 100 parts mono-functional unsaturated acrylate ester monomer, between about 50 and 250 parts essentially saturated thermoplastic tackifying resin polymer dissolved in said acrylate ester monomer, between about 4 and 150 parts non-crystallizing elastomeric block copolymer dissolved in said acrylate ester monomer, and initiator responsive to radiation;
- subjecting said composition to radiation to which said initiator is responsive;
- and
- inducing copolymerization of said acrylate ester monomer and said non-crystallizing elastomeric block copolymer by said initiator.
The process of forming a pressure sensitive adhesive that comprises:
- providing a composition including, by weight, 100 parts tetrahydrofurfuryl acrylate ester monomer, between about 50 and 250 parts essentially saturated tackifying resin polymer dissolved in said tetrahydrofurfuryl acrylate ester monomer, between about 4 and 150 parts non-crystallizing elastomeric block copolymer dissolved in said tetrahydrofurfuryl acrylate ester monomer, and initiator responsive to radiation to emit free radicals;
- subjecting said composition to radiation to which said initiator is responsive;
- and
- inducing copolymerization of said tetrahydrofurfuryl acrylate ester monomer and said non-crystallizing elastomeric block copolymer by said initiator.
A composition for forming a pressure sensitive adhesive, comprising:
- monofunctional unsaturated acrylate ester monomer;
- essentially saturated thermoplastic tackifying resin polymer dissolved in said acrylate ester monomer;
- non-crystallizing elastomeric block copolymer dissolved in said acrylate ester monomer;
- and
- initiator responsive to radiation to induce copolymerization of the acrylate ester monomer and the non-crystallizing elastomeric block copolymer.
A composition for forming a pressure sensitive adhesive, comprising:
- monofunctional unsaturated acrylate ester monomer;
- essentially saturated thermoplastic tackifying resin polymer dissolved in said acrylate ester monomer;
- chlorosulfonated polyethylene dissolved in said acrylate ester monomer;
- and
- initiator responsive to radiation to induce copolymerization of the acrylate ester monomer and the chlorosulfonated polyethylene.
A composition for forming a pressure sensitive adhesive, comprising:
- monofunctional unsaturated acrylate ester monomer;
- essentially saturated thermoplastic tackifying resin polymer dissolved in said acrylate ester monomer;
- carboxy terminated butadiene-acrylonitrile copolymer dissolved in said acrylate ester monomer;
- and
- initiator responsive to radiation to induce copolymerization of the acrylate ester monomer and the carboxy terminated butadiene-acrylonitrile copolymer.
A composition for forming a pressure sensitive adhesive, comprising:
- monofunctional unsaturated acrylate ester monomer;
- essentially saturated thermoplastic tackifying resin polymer dissolved in said acrylate ester monomer;
- vinyl terminated butadiene-acrylonitrile copolymer dissolved in said acrylate ester monomer;
- and
- initiator responsive to radiation to induce copolymerization of the acrylate ester monomer and the vinyl terminated butadiene-acrylonitrile copolymer.
Dependencies are inferred from the claim text.