Back to results
US 8,785,517 B2Granted
Pressure-sensitive adhesives with onium-epdxy crosslinking system
Assignee3M Innovative Properties Company
InventorsArlin L. Weikel, Larry R. Krepski, Jason D. Clapper, Wayne S. Mahoney, Babu N. Gaddam
Life of this patent
Estimating the term…
Abstract
A pre-adhesive composition is described comprising an acid- and epoxy-functional (meth)acryloyl copolymer, which when crosslinked using an ionic photoacid generator (PAG) provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles having desirable properties.
Claims26
A crosslinkable composition comprising:
- a) an epoxy-functional (meth)acrylic copolymer comprising interpolymerized monomers comprising:
- i) an alkyl (meth)acrylate monomer;
- ii) an epoxy-functional (meth)acryloyl monomer;
- iii) an acid-functional ethylenically unsaturated monomer in amounts of 1 to 15 parts by weight of the 100 parts of the total monomer;
- iv) an optional non-acid functional polar monomer;
- v) an optional vinyl monomer, and
- vi) an optional multifunctional (meth)acrylate crosslinker;
- and
- b) an ionic photoacid generator.
6 more elements
A method of preparing a pressure-sensitive adhesive comprising the steps of
- a) providing a syrup copolymer composition comprising solvent monomer(s) and a solute copolymer of interpolymerized monomer units of:
- i) an alkyl (meth)acrylate monomer;
- ii) an epoxy-functional (meth)acryloyl monomer;
- iii) an acid-functional ethylenically unsaturated monomer in amounts of 1 to 15 parts by weight of the 100 parts of the total monomer;
- iv) an optional non-acid functional polar monomer;
- v) an optional vinyl monomer;
- and
- b) combining the syrup copolymer composition with an ionic photoacid generator, optional multifunctional (meth)acrylate and optional photoinitiator, and
- c) irradiating with UV radiation.
6 more elements
Dependencies are inferred from the claim text.