Pressure-sensitive removable adhesives based on polyacrylates, preparation process and articles containing them
AssigneeAto Findley, Inc.
InventorsJohan De Jonge, Rodney M. Weston
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Abstract
The present invention relates to pressure-sensitive removable adhesives based on polyacrylates, characterized in that they comprise a compound of formula: wherein R1, R2 and R3, which are identical or different, represent a linear or branched C1-C8, preferably C2-C6, alkyl radical; and R4 represents H or an acyl radical COR5 wherein R5 is a linear or branched C1-C3 alkyl radical. The present invention also relates to a process for the preparation of said adhesives. The present invention further relates to adhesive labels and tapes comprising said adhesives.
Claims9
A pressure-sensitive adhesive comprising an aqueous poly(meth)acrylate emulsion formed by a process comprising steps of:
- dissolving at least one compound of formula:
- wherein:
- R1, R2 and R3, which are identical or different, represent a linear or branched C1-C8 alkyl radical and
- R4 represents H or an acyl radical COR5 in which R5 is a linear or branched C1-C3 alkyl radical
- in a mixture of acrylic monomers comprising at least one alkyl (meth)acrylate, at least one polar copolymerizable monomer and at least one polyunsaturated copolymerizable monomer and polymerizing the monomers.
A pressure-sensitive adhesive which comprises an aqueous poly(meth)acrylate emulsion-comprising at least one compound of formula:
- wherein:
- R1, R2 and R3, which are identical or different, represent a linear or branched C1-C8 alkyl radical and
- R4 represents H or an acyl radical COR5 in which R5 is a linear or branched C1-C3 alkyl radical
- wherein the poly(meth)acrylate is resulted from an aqueous emulsion polymerization of a mixture of acrylic monomers in the presence of said formula comprising
- at least one alkyl(meth)acrylate,
- at least one polar copolymerizable monomer and
- at least one polyunsaturated copolymerizable monomer.
Dependencies are inferred from the claim text.