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US 4,563,388 AGranted
Polyolefin substrate coated with acrylic-type normally tacky and pressure-sensitive adhesive and a method of making same
AssigneeMinnesota Mining and Manufacturing Company
InventorsThomas J. Bonk, J. Thomas Simpson
Life of this patent
Estimating the term…
Abstract
Acrylic-type normally tacky and pressure-sensitive adhesives are firmly bonded to polyolefin substrates that have been primed by coating with a monomer composition and subjecting the coated substrate to actinic radiation to effect graft-polymerization.
Claims11
A normally tacky and pressure-sensitive adhesive-coated product comprising:
- (a) a polyolefin substrate,
- (b) A monomer composition graft-polymerized to at least a portion of said substrate by ionizing radiation, said monomer composition having at least one monomer selected from the group consisting of acrylic acid, methacrylic acid and esters thereof;
- acrylamide;
- methacrylamide;
- sterically non-hindered tertiary alkyl acrylamides and methacrylamides;
- secondary alkyl acrylamides and methacrylamides having three or less carbon atoms in the alkyl group;
- and N-vinyl pyrrolidone, and
- (c) firmly adherently bonded to the graft-polymerized monomer an acrylic type normally tacky and pressure-sensitive adhesive.
5 more elements
A normally tacky, pressure-sensitive adhesive-coated polyolefin substrate, having adhesive firmly adhered to said substrate, even at elevated temperatures, prepared according to a process comprising the steps of:
- (a) treating the surface of said substrate to enable a polar liquid to wet said surface,
- (b) coating on said substrate a monomer composition containing a monomer selected from the group consisting of acrylic acid, methacrylic acid and esters thereof;
- acrylamide;
- methacrylamide;
- sterically non-hindered tertiary alkyl acrylamides and methacrylamides;
- secondary alkyl acrylamides and methacrylamides having three or less carbon atoms in the alkyl group;
- and N-vinyl pyrrolidone,
- (c) irradiating the coated substrate with ionizing radiation to graft-polymerize said monomer to the treated substrate, and
- (d) applying a layer of acrylic-type pressure-sensitive adhesive over the graft-polymerized surface.
6 more elements
Dependencies are inferred from the claim text.