Use of Pressure-Sensitive Adhesive Tapes for Optical Applications

Patent metadata

Field	Value
Publication number	US-2016200947-A1
Application number	US-201414916348-A
Country	US
Kind code	A1
Filing date	Aug 22, 2014
Priority date	Sep 5, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

The invention relates to an adhesive tape comprising at least one layer of a pressure-sensitive acrylate adhesive comprising a polymer component and at least one additive, where the polymer component is composed of one or more copolymers each based on the following monomers: a) from 5 to 35% by weight of one or more monomers containing hydroxy groups and having a copolymerizable double bond; b) from 0 to 50% by weight of one or more acrylate and/or methacrylate monomers each having at least one amide group, urethane group, urea group, or carboxylic anhydride unit and/or ethylene glycol unit, c) from 15 to 95% by weight of an alkyl (meth)acrylate, where the alkyl moiety has from 1 to 14 carbon atoms, where the pressure-sensitive acrylate adhesive comprises one or more 2-(2H-Benzotriazol-2-yl) derivatives admixed as additive; and also a corresponding adhesive.

First claim

1 . An adhesive tape comprising at least one layer of a pressure-sensitive acrylate adhesive comprising a polymer component and at least one additive, the polymer component being formed of one or more copolymers assignable in each case to the following monomers:
a) 5 to 35 wt % of one or more hydroxyl-containing monomers with copolymerizable double bond, b) 0 to 50 wt % of one or more acrylate and/or methacrylate monomers with in each case at least one amide group, urethane group, urea group, carboxylic anhydride unit and/or ethylene glycol unit, c) 15 to 95 wt % of an alkyl (meth)acrylate, the alkyl radical having 1 to 14 carbon atoms, wherein the pressure-sensitive acrylate adhesive has been admixed with one or more 2-(2H-benzotriazol-2-yl) derivatives as additive.

2 . The adhesive tape as claimed in claim 1 , wherein the one or more 2-(2H-benzotriazol-2-yl) derivatives is present in the pressure-sensitive acrylate adhesive in an amount such that the product of the thickness of the layer of pressure-sensitive acrylate adhesive and the amount of the 2-(2H-benzotriazol-2-yl) derivatives present is in total in the range from 75 to 200 g*μm per 100 g of the polymer component.

3 . The adhesive tape as claimed in claim 1 , wherein the one or more 2-(2H-benzotriazol-2-yl) derivative is a 2-(2H-benzotriazol-2-yl)phenol derivative.

4 . The adhesive tape as claimed in claim 1 , wherein one or more [[3,5-bis(1,1-dimethyl-4-hydroxy-phenyl)methyl]alkylmalonate derivatives have been admixed as further additives.

5 . The adhesive tape as claimed in claim 4 , wherein the one or more [[3,5-bis(1,1-dimethyl-4-hydroxyphenyl)-methyl]alkylmalonate derivatives is present in the pressure-sensitive acrylate adhesive in an amount such that the product of the thickness of the layer of pressure-sensitive acrylate adhesive and the amount of the [[3,5-bis(1,1-dimethyl-4-hydroxyphenyl)methyl]alkylmalonate derivatives present is in total in the range from 25 to 200 g*μm per 100 g of the polymer component.

6 . The adhesive tape as claimed in claim 4 , wherein the one or more [[3,5-bis(1,1-dimethyl)-4-hydroxyphenyl)methyl]alkylmalonate derivatives is [[3,5-bis[(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonates.

7 . The adhesive tape as claimed in claim 1 , wherein one or more diaromatically functionalized ethanediamide derivatives have been admixed as further additives.

8 . The adhesive tape as claimed in claim 7 , wherein the one or the more diaromatically functionalized ethanediamide derivatives is present in the pressure-sensitive acrylate adhesive in an amount such that the product of the thickness of the layer of pressure-sensitive acrylate adhesive and the amount of the diaromatically functionalized ethanediamide derivatives present is in total in the range from 25 to 200 g*μm per 100 g of the polymer component.

9 . The adhesive tape as claimed in claim, wherein the one or more diaromatically functionalized ethanediamide derivative is N-(2-ethoxyphenyl)-N′-(2-ethylphenyl)ethanediamide.

10 . The adhesive tape as claimed in claim 1 , wherein one or more hindered piperidine derivatives have been admixed as further additives.

11 . The adhesive tape as claimed in claim 10 , wherein the one or more hindered piperidine derivatives is present in the pressure-sensitive acrylate adhesive in an amount such that the product of the thickness of the layer of pressure-sensitive acrylate adhesive and the amount of the diaromatic piperidine derivatives present is in total in the range from 25 to 200 g*μm per 100 g of the polymer component.

12 . The adhesive tape as claimed in claim 10 , wherein the one or more hindered piperidine derivative is the polymeric reaction product of 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol and of dimethyl butanedioate.

13 . The adhesive tape as claimed in claim 1 , wherein the one or more copolymers of the polymer component each have a weight-average molecular weight M w in the range from 200 000 g/mol to 3 000 000 g/mol.

14 . The adhesive tape as claimed in claim 1 , wherein the pressure-sensitive acrylate adhesive is in a form free from tackifier resin.

15 . The adhesive tape as claimed in claim 1 , wherein the layer of pressure-sensitive acrylate adhesive has a thickness in the range from 10 to 500 μm.

16 . The adhesive tape as claimed in claim 1 , in the form of a single-layer, double-sidedly bonding adhesive tape, consisting of the layer of pressure-sensitive acrylate adhesive.

17 . The adhesive tape as claimed in claim 16 , wherein the layer of pressure-sensitive acrylate adhesive is lined on one or both sides with a temporary carrier material.

18 . An adhesive comprising a polymer component and at least one additive, the polymer component being formed of one or more copolymers assignable in each case to the following monomers:
a) 5 to 35 wt % of one or more hydroxyl-containing monomers with copolymerizable double bond, b) 0 to 50 wt % of one or more acrylate and/or methacrylate monomers with in each case at least one amide group, urethane group, urea group, carboxylic anhydride unit and/or ethylene glycol unit, c) 15 to 95 wt % of an alkyl (meth)acrylate, the alkyl radical having 1 to 14 carbon atoms, wherein the pressure-sensitive acrylate adhesive has been admixed with one or more 2-(2H-benzotriazol-2-yl) derivatives as additive.

19 . The adhesive as claimed in claim 18 , wherein one or more [[3,5-bis(1,1-dimethyl-4-hydroxyphenyl)methyl]alkylmalonate derivatives and/or one or more diaromatically functionalized ethanediamide derivatives and/or one or more hindered piperidine derivatives have been admixed as further additives.

20 . A method of bonding substrates to electrically conductive films comprising applying an adhesive tape as claimed in claim 1 .

21 . (canceled)

22 . (canceled)

Assignees

• Tesa Se

Inventors

• Husemann Marc
• Ellinger Jan
• Koop Matthias
• Lübbert Niko

Classifications

• C09J133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C08K5/3435

  Piperidines · CPC title

• C09J11/06

  organic · CPC title

• C09J7/0217 Primary

  Chemistry & Metallurgy · mapped topic

• C09J5/00

  Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers · CPC title