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US 12,163,069 B2Granted
Post-polymerization functionalization of pendant functional groups
AssigneeAvery Dennison Corporation
InventorsEric L. Bartholomew, William Bottorf, Kyle R. Heimbach, Brandon S. Miller, Michael T. Waterman, Michael Zajaczkowski
Life of this patent
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Abstract
Modification of functional groups along a polymer backbone to render the groups activatable upon exposure to actinic radiation is described. The polymers are typically controlled architecture polymers. Also described are adhesives containing the modified architectured polymers and related methods of use.
Claims30
A composition comprising:
- a precursor and a reacting agent,
- the precursor comprising at least one acrylic block copolymer, the at least one acrylic block copolymer comprising
- a first reactive segment of controlled molecular weight and position that comprises at least one monomer having a functional group selected from the group consisting of a self-reactive functional group, a reactive functional group, a non-reactive functional group, and combinations thereof;
- and
- a second segment of controlled molecular weight and position that includes at least one monomer having a functional group selected from the group consisting of a reactive functional group, a non-reactive functional group, and combinations thereof;
- wherein at least one of the functional groups of the at least one acrylic block copolymer can undergo a post-polymerization functionalization reaction with the reacting agent to make the at least one acrylic block copolymer crosslinkable upon exposure to an actinic radiation,
- wherein the at least one acrylic block copolymer does not contain ethylenic unsaturation prior to the post-polymerization functionalization reaction, and
- wherein the composition is free of solvents;
- wherein the self-reactive functional group is selected from the group consisting of silyl, silane, epoxy, cyclic ethers, isocyanate, cyclic esters, and thiol;
- wherein the reactive functional group is selected from the group consisting of carbonyl, carbonate ester, isocyanate, epoxy, vinyl, thiol, cyclic ether groups, and combinations thereof;
- and
- wherein the non-reactive functional group is derived from C1 to about C20 alkyl, aryl, or cyclic acrylates or C1 to about C20 alkyl, aryl, or cyclic methacrylates;
- and
- wherein the reacting agent comprises at least one of a double bond and a functional group selected from the group consisting of hydroxyl, carboxyl, carbonyl, carbonate ester, isocyanate, epoxy, vinyl, amine, amide, imide, anhydride, thiol, acid, acetoacetyl groups, alkoxymethylol, cyclic ether groups, and combinations thereof.
11 more elements
A composition comprising:
- a precursor and a reacting agent,
- the precursor comprising at least one acrylic block copolymer, the at least one acrylic block copolymer comprising
- a first reactive segment of controlled molecular weight and position that comprises at least one monomer having a functional group selected from the group consisting of a self-reactive functional group, a reactive functional group, a non-reactive functional group, and combinations thereof;
- and
- a second segment of controlled molecular weight and position that includes at least one monomer having a functional group selected from the group consisting of a reactive functional group, a non-reactive functional group, and combinations thereof;
- wherein at least one of the functional groups of the at least one acrylic block copolymer can undergo a post-polymerization functionalization reaction with the reacting agent to make the at least one acrylic block copolymer crosslinkable upon exposure to an actinic radiation,
- wherein the at least one acrylic block copolymer does not contain ethylenic unsaturation prior to the post-polymerization functionalization reaction,
- wherein the precursor forms a pre-adhesive composition after the post-polymerization functionalization reaction of the at least one acrylic block copolymer, and
- wherein the pre-adhesive prior to activation exhibits less than about 7.5% gel at about 99% or more solids.
6 more elements
Dependencies are inferred from the claim text.