Acrylic pressure sensitive adhesive and surface finishing material comprising the same

Patent metadata

Field	Value
Publication number	US-9550924-B2
Application number	US-88391510-A
Country	US
Kind code	B2
Filing date	Sep 16, 2010
Priority date	Sep 16, 2010
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

Acrylic pressure-sensitive adhesive including an acrylic copolymer formed by copolymerizing: i) 81 to 96% by weight of an alkyl (meth) acrylic acid ester monomer having a carbon number of an alkyl group of 2 to 14; ii) 1 to 10% by weight of at least one monomer selected from the group consisting of an allyl ester, a vinyl ester and an unsaturated acetate; iii) 1 to 10% by weight of an acrylonitrile monomer; and iv) 0.1 to 2% by weight of a crosslinker including 5 to 15 of an alkylene oxide group, and having two or more groups of an acrylate group, a vinyl group or the combination thereof, and a surface finishing material comprising the same, which is environmentally friendly, has an excellent room temperature and an aging adhesive property, and has an excellent constructability.

First claim

What is claimed is:

1. An acrylic pressure-sensitive adhesive, comprising an acrylic copolymer formed by an emulsion copolymerization of:
i) 81 to 96% by weight of an alkyl (meth) acrylic acid ester monomer having an alkyl group with a carbon number of 4 to 14;
ii) 1 to 10% by weight of vinyl acetate;
iii) 1 to 10% by weight of an acrylonitrile monomer;
iv) 0.1 to 2% by weight of a crosslinker including 15 moles of an alkylene oxide group, and having two or more groups of an acrylate group, a vinyl group or a combination thereof;
v) 0.5 to 2 parts by weight of alkyl diphenyl oxide disulfonate as an anionic surfactant based on total 100 parts by weight of components i)-iv); and
vi) 0.2 to 2 parts by weight of an ammonium persulfate as an aqueous polymerization initiator, based on total 100 parts by weight of components i)-iv),
wherein the acrylic copolymer has a gel content of 50% by weight to 70% by weight, and
wherein the acrylic pressure-sensitive adhesive is an aqueous emulsion adhesive.

2. The acrylic pressure-sensitive adhesive of claim 1 , wherein the monomer of the i) is at least one selected from the group consisting of n-butyl (meth)acrylate, t-butyl (meth)acrylate, sec-butyl (meth)acrylate, pentyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, lauryl (meth)acrylate, and tetradecyl (meth)acrylate.

3. The acrylic pressure-sensitive adhesive of claim 1 , wherein the crosslinker of the iv) is at least one selected from the group consisting of polyethylene glycol diacrylate and polypropylene glycol diacrylate.

4. The acrylic pressure-sensitive adhesive of claim 1 , further comprising a tackifier.

5. The acrylic pressure-sensitive adhesive of claim 1 , wherein the acrylic pressure-sensitive adhesive further comprises at least one selected from the group consisting of an ultraviolet stabilizer, an antioxidant, a colorant, an adjuvant, a filler, a defoamer, a surfactant, and a plasticizer.

6. A surface finishing material comprising:
a substrate layer; and
an adhesive layer that is formed on a one side or both sides of the substrate layer, and contains the acrylic pressure-sensitive adhesive of claim 1 .

7. The surface finishing material of claim 6 , wherein the substrate layer is a polymer resin, a wood, leather, a fabric, or a metal.

8. The surface finishing material of claim 6 , wherein the adhesive layer has a thickness of 20 to 30 μm.

9. A surface finishing material comprising:
a substrate layer; and
an adhesive layer that is formed on a one side or both sides of the substrate layer, and contains the acrylic pressure-sensitive adhesive of claim 2 .

10. A surface finishing material comprising:
a substrate layer; and
an adhesive layer that is formed on a one side or both sides of the substrate layer, and contains the acrylic pressure-sensitive adhesive of claim 3 .

11. A surface finishing material comprising:
a substrate layer; and
an adhesive layer that is formed on a one side or both sides of the substrate layer, and contains the acrylic pressure-sensitive adhesive of claim 4 .

12. A surface finishing material comprising:
a substrate layer; and
an adhesive layer that is formed on a one side or both sides of the substrate layer, and contains the acrylic pressure-sensitive adhesive of claim 5 .

Assignees

• Ko Chan Bum
• Kim Young Min
• Song Kong Ju
• Lee Kum Hyoung
• Lg Chemical Ltd

Inventors

• Ko Chan Bum
• Kim Young Min
• Song Kong Ju
• Lee Kum Hyoung

Classifications

• Y10T428/2804

  Next to metal · CPC title

• Y10T428/264

  Up to 3 mils · CPC title

• C09J133/10

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C09J133/08 Primary

  Homopolymers or copolymers of acrylic acid esters · CPC title

• Y10T442/2754

  Pressure-sensitive adhesive · CPC title