JPWO2020136555A5

JPWO2020136555A5 -

Info

Publication number: JPWO2020136555A5
Application number: JP2021537710A
Authority: JP
Publication date: 2023-01-04

Claims

an article,
a substrate;
a hot melt processable pressure sensitive adhesive disposed on at least a portion of said substrate;
wherein the hot melt processable pressure sensitive adhesive comprises a (meth)acrylate-based copolymer that is the reaction product of a reaction mixture, the reaction mixture being substantially free of acidic or basic monomers, and As a polymerizable component,
70 to 96 parts by weight of a first (meth)acrylate monomer of general formula I CH ₂ =CR ¹ -(CO)-OR ²
Formula I
[wherein R ¹ is hydrogen or a methyl group and R ² is an alkyl, heteroalkyl, alkenyl, or aryl group];
4 parts to 30 parts by weight of a second (meth)acrylate monomer of general formula II CH ₂ =CR ¹ -(CO)-OR ³
Formula II
[wherein R ¹ is hydrogen or a methyl group and R ³ is a hydroxyl-substituted alkyl group, a hydroxyl-substituted heterocyclic group, a hydroxyl-substituted aryl group, or a hydroxyl-substituted polymer];
a copolymerizable photocrosslinking agent;
Goods, including

The pressure sensitive adhesive further comprises particles of a thermoplastic polymer, the thermoplastic polymer being polyethylene, ethylene vinyl acetate, ethylene methyl acrylate, ethylene acrylic acid, ethylene acrylic acid ionomer, polypropylene, acrylic polymer, polyphenylene ether, polyphenylene. The article of claim 1 comprising sulfides, acrylonitrile-butadiene-styrene copolymers, polyurethanes, and mixtures and blends thereof.

The article of claim 1, wherein the substrate comprises polymeric films, fabrics, nonwovens, foams, papers, meshes, adhesives, or release liners.

The article of claim 1, wherein said reaction mixture comprises 80 to 96 parts by weight of said first monomer and 4 to 20 parts by weight of said second monomer.

The article of claim 1, wherein said (meth)acrylate-based copolymer has a Tg of -20°C or less.

2. The article of claim 1, wherein the (meth)acrylate-based copolymer has a weight average molecular weight Mw of 500,000 grams/mole or greater.

said R ³ of said second monomer is
a hydroxyl-substituted alkyl group containing from 2 to 6 carbon atoms, or a polymeric group containing a hydroxyl-terminated alkylene oxide group,
The alkylene oxide group is a repeating unit of the formula —(R ⁴ —O—)n—, wherein R ⁴ is an alkyl group containing 2 to 4 carbon atoms, and n is 3 to 100 is an integer].

A packaged adhesive composition comprising:
A hot melt processable adhesive comprising a polymerized (meth)acrylate-based copolymer formed from a polymerizable pre-adhesive mixture, said polymerizable pre-adhesive mixture composition substantially comprising an acidic or basic monomer. free and from 70 parts by weight to 96 parts by weight of a first (meth)acrylate monomer of general formula I CH ₂ =CR ¹ -(CO)-OR ²
Formula I
[wherein R ¹ is hydrogen or a methyl group and R ² is an alkyl, heteroalkyl, alkenyl, or aryl group];
4 parts to 30 parts by weight of a second (meth)acrylate monomer of general formula II CH ₂ =CR ¹ -(CO)-OR ³
Formula II
[wherein R ¹ is hydrogen or a methyl group and R ³ is a hydroxyl-substituted alkyl group, a hydroxyl-substituted heterocyclic group, a hydroxyl-substituted aryl group, or a hydroxyl-substituted polymer];
a copolymerizable photocrosslinking agent;
at least one initiator;
a hot melt processable adhesive comprising
packaging materials;
A packaged adhesive composition comprising:

9. The packaged adhesive composition of Claim 8 , wherein the polymerizable pre-adhesive mixture composition further comprises a chain transfer agent.

9. The polymerizable pre-adhesive mixture composition of claim 8 , wherein the polymerizable pre-adhesive mixture composition comprises from 80 parts by weight to 96 parts by weight of the first monomer and from 4 parts by weight to 20 parts by weight of the second monomer. A packaged adhesive composition.

A method of making an adhesive article, comprising:
providing a substrate having a first major surface and a second major surface;
To provide a hot melt processable packaged adhesive composition, the hot melt processable packaged adhesive composition comprising:
A hot melt processable adhesive comprising a polymerized (meth)acrylate-based copolymer formed from a polymerizable pre-adhesive mixture, comprising:
The polymerizable pre-adhesive mixture composition is substantially free of acidic or basic monomers, and from 70 parts by weight to 96 parts by weight of a first (meth)acrylate monomer of general formula I CH ₂ =CR ¹ -(CO)-OR ²
Formula I
[wherein R ¹ is hydrogen or a methyl group and R ² is an alkyl, heteroalkyl, alkenyl, or aryl group];
4 parts to 30 parts by weight of a second (meth)acrylate monomer of general formula II CH ₂ =CR ¹ -(CO)-OR ³
Formula II
[wherein R ¹ is hydrogen or a methyl group and R ³ is a hydroxyl-substituted alkyl group, a hydroxyl-substituted heterocyclic group, a hydroxyl-substituted aryl group, or a hydroxyl-substituted polymer];
a copolymerizable photocrosslinking agent;
a hot melt processable adhesive comprising at least one initiator;
providing, including packaging materials;
hot melt processing the packaged adhesive composition;
disposing the hot melt processed packaged adhesive composition on at least a portion of the second major surface of the substrate to form a pressure sensitive adhesive layer;
and photocrosslinking the pressure sensitive adhesive layer.