Pressure-sensitive adhesives comprising low molecular weight acid-functional acrylic resins and methods of making and using same
AssigneeBASF SE
InventorsMatthias Gerst, Michael Gross, Rafael Galvan
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Abstract
Disclosed herein are compositions comprising a first copolymer derived from monomers comprising a (meth)acrylate monomer, an acid monomer, and optionally at least one additional monomer selected from the group consisting of styrene, α-methyl-styrene, vinyl toluene, and mixtures thereof, wherein the first copolymer is derived in the absence of a molecular weight regulator and wherein the first copolymer has a weight average molecular weight of less than 10,000 Daltons, and methods of making the same. The compositions and methods disclosed can be used, for instance, in pressure-sensitive adhesive applications.
Claims22
A pressure-sensitive adhesive, comprising:
- a first copolymer derived from monomers comprising a (meth)acrylate monomer and an acid monomer;
- wherein the first copolymer is polymerized at a temperature of at least 150° C., and
- wherein the first copolymer has a weight average molecular weight of from 2,000 to 7,000 Daltons.
A pressure-sensitive adhesive, comprising:
- a first copolymer derived from monomers comprising a (meth)acrylate monomer and an acid monomer in an aqueous medium;
- wherein the aqueous medium includes ammonia to produce a pH of from 6to 9,
- wherein the first copolymer is polymerized at a temperature of at least 150° C., and
- wherein the first copolymer has a weight average molecular weight of less than 10,000Daltons.
A pressure-sensitive adhesive, comprising:
- a first copolymer derived from monomers comprising a (meth)acrylate monomer and an acid monomer;
- wherein the monomers contain 0% by weight of a vinyl aromatic monomer,
- wherein the first copolymer is polymerized at a temperature of at least 150° C., and
- wherein the first copolymer has a weight average molecular weight of less than 10,000Daltons.
Dependencies are inferred from the claim text.