Removable emulsion pressure-sensitive adhesives
AssigneeAvery Dennison Corporation
InventorsIan Brown, Graham Yeadon
Life of this patent
Estimating the term…
Abstract
Improved, removable PSA compositions and constructions contain an emulsion acrylic PSA copolymer of a plurality of acrylic monomers and at least one multifunctional crosslinking monomer, compounded with a wax and a plasticizer. Peel forces required to remove the constructions from a variety of substrates are notably smaller than those required to remove comparable compositions containing no crosslinking monomer.
Claims34
A removable, pressure-sensitive adhesive (PSA) composition, comprising:
- a PSA copolymer of a plurality of copolymerizable monomers and at least one multifunctional crosslinking monomer;
- a citrate plasticizer.
A removable, pressure-sensitive adhesive (PSA) construction, comprising:
- a PSA composition coated on or applied to a primed or unprimed facestock, the composition comprising a PSA copolymer of a plurality of copolymerizable monomers and at least one multifunctional crosslinking monomer;
- a wax;
- and
- a citrate plasticizer.
In a removable, pressure-sensitive adhesive (PSA) construction having a PSA composition coated on or applied to a primed or unprimed facestock, which composition contains a PSA copolymer of a plurality of monomers, an emulsifiable wax, and a plasticizer, the improvement comprising (i) a multifunctional crosslinking monomer copolymerized with the plurality of monomers and sufficient to substantially lower the 90° peel force required to remove the construction from a substrate, after at room temperature, as compared to the 90° peel force required to remove a comparison construction identical in all respects except for the absence of a multifunctional crosslinking monomer, and (ii) the plasticizer is a citrate plasticizer.
A removable PSA construction, comprising:
- (a) a facestock having an inner surface and an outer surface;
- (b) a face side adhesive (FSA) in contact with the inner surface of the facestock;
- and
- (c) a liner side adhesive (LSA) in contact with the FSA, said LSA comprising a PSA copolymer of a plurality of copolymerizable monomers and at least one multifunctional crosslinking monomer, a wax, and a citrate plasticizer.
Dependencies are inferred from the claim text.