US 2026/0226318 A1 · FOLDABLE OPTICALLY CLEAR ADHESIVE FILMS

Abstract

Adhesive articles include a release liner and an adhesive layer disposed on the release surface of the release liner. The adhesive layer is the reaction product of a reaction mixture of at least 2 alkyl (meth)acrylate monomers with alkyl groups that have at least 4 carbon atoms, are hydroxyl-functional alkyl groups, or are a heteroalkyl groups; at least one multi-functional (meth)acrylate; at least one surface-modified fumed silica; and at least one initiator. The adhesive layer has a variety of desirable properties including a Tg of less than −35° C. as measured by DMA (Dynamic Mechanical Analysis), a storage modulus (G′) at −20° C. of less than 200 kiloPascals at 1 Hz and is optically clear.

Claims20

Dependent claims

An adhesive article comprising:

a first release liner with at least one release surface;
and
an adhesive layer disposed on the release surface of the first release liner, the adhesive layer comprising the reaction product of a reaction mixture comprising:
at least 2 acid-free (meth)acrylate monomers of Formula 1:
wherein R1 is hydrogen or a methyl group;
—(CO)— is a carbonyl group C═O;
and
R2 is an alkyl group comprising at least 4 carbon atoms, a hydroxyl-functional
alkyl group, or a heteroalkyl group;
at least one multi-functional (meth)acrylate;
at least one surface-modified fumed silica;
and
at least one initiator,
wherein the adhesive layer has a Tg of less than −35° C. as measured by DMA (Dynamic Mechanical Analysis), a storage modulus (G′) at −20° C. of less than 200 kiloPascals at 1 Hz and is optically clear.

11 more elements

A method of forming an adhesive article, comprising:

providing a first release liner with at least one release surface;
disposing a reaction mixture on at least a portion of the release surface of the first release liner, wherein the reaction mixture comprises:
at least 2 acid-free (meth)acrylate monomers of Formula 1:
wherein R1 is hydrogen or a methyl group;
—(CO)— is a carbonyl group C═O;
and
R2 is an alkyl group comprising at least 4 carbon atoms, a hydroxyl-functional
alkyl group, or a heteroalkyl group;
at least one multi-functional urethane-(meth)acrylate;
at least one silane coupling agent;
at least one surface-modified fumed silica;
and
at least one initiator;
and
curing the reaction mixture to form an adhesive layer.

12 more elements

Dependencies are inferred from the claim text.

Foldable optically clear adhesive films

Life of this patent

Foldable optically clear adhesive films

Life of this patent

Abstract

Claims20