Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets, and surface protecting film

A composition and adhesive technology, used in the fields of surface protection films, antistatic adhesive compositions, and adhesive sheets, can solve the problems of insufficient performance, pollution of optical components, and difficulty in adapting to antistatic surface protection Film improvement requirements, etc.

Active Publication Date: 2005-11-16
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such PSA sheets, the compounding amount of the exemplified alkali metal salt is 0.1 to 5 parts by weight with respect to 100 parts by weight of the acrylic polymer. When these PSA compositions are applied to the surface protection film, after Contamination of optical components after a period of time or treatment at high temperature, so its performance is not sufficient
[0009] As mentioned above, in the above-mentioned inventions, the above-mentioned problems cannot be solved in a balanced manner. In the technical fields related to optical and electronic components, where static electricity or pollution will bring particularly serious problems, it is difficult to adapt to the antistatic property. Further improvement requirements proposed by surface protection film

Method used

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  • Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets, and surface protecting film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] (Preparation of binder solution)

[0172]The above-mentioned acrylic polymer (A) solution (40% by weight) was diluted to 20% by weight with ethyl acetate, and 2.6 parts by weight of the above-mentioned antistatic agent solution (a) (50% by weight) was added to 100 parts by weight of the solution, As a cross-linking agent, hexamethylene diisocyanate tripolyisocyanate body (Nippon Polyurethane Industry Co., Ltd., Coronate HX) 0.6 parts by weight, as a cross-linking catalyst, dibutyltin dilaurate (1% by weight of ethyl acetate Solution) 0.4 parts by weight, keeping the temperature around 25° C., performing mixing and stirring for about 1 minute to prepare an acrylic adhesive solution (1). However, in the acrylic adhesive solution (1), the compounding quantity of the alkali metal salt (lithium salt) with respect to 100 weight part of acrylic polymers was 0.065 weight part.

[0173] (production of adhesive sheet)

[0174] Apply the above-mentioned acrylic adhesive solution...

Embodiment 2

[0176] (Preparation of binder solution)

[0177] Use 100 parts by weight of a solution that dilutes the above-mentioned acrylic polymer (B) solution (40% by weight) to 20% by weight with ethyl acetate instead of diluting the above-mentioned acrylic polymer (A) solution (40% by weight) with ethyl acetate. %) was diluted to 100 parts by weight of a solution of 20% by weight, an acrylic adhesive solution (2) was prepared in the same manner as in Example 1. However, in the acrylic adhesive solution (2), the compounding quantity of the alkali metal salt (lithium salt) was 0.065 weight part with respect to 100 weight part of acrylic polymers.

[0178] (production of adhesive sheet)

[0179] A protective film was produced by the method similar to Example 1 except having used the said acrylic-type adhesive solution (2) instead of the said acrylic-type adhesive solution (1).

Embodiment 3

[0181] (Preparation of binder solution)

[0182] The above-mentioned acrylic polymer (A) solution (40% by weight) was diluted to 20% by weight with ethyl acetate, and 1.6 parts by weight of the above-mentioned antistatic agent solution (b) (50% by weight) was added to 100 parts by weight of the solution, As a crosslinking agent, 0.4 parts by weight of hexamethylene diisocyanate tripolyisocyanate body (manufactured by Nippon Polyurethane Industry Co., Ltd., Coronate HX), as a crosslinking catalyst, dibutyltin dilaurate (1% by weight of ethyl acetate Solution) 0.4 parts by weight, keeping the temperature around 25° C., performing mixing and stirring for about 1 minute to prepare an acrylic adhesive solution (3). However, in the acrylic adhesive solution (3), the compounding quantity of the alkali metal salt (lithium salt) with respect to 100 weight part of acrylic polymers was 0.040 weight part.

[0183] (production of adhesive sheet)

[0184] A protective film was produced by...

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Abstract

An object of the present invention is to provide a surface protecting film which reduces staining on an adherend (subject to be protected) when applied to a surface protecting film of plastic products, and prevents electrification on an adherend (subject to be protected) which has not been electrification-prevented when a surface protecting film is peeled. There is provided a pressure-sensitive adhesive composition, which comprises a (meth)acryl-based polymer containing, as a main component, a (meth)acryl-based monomer having an alkyl group of a carbon number of 6 to 14, a polyether polyol compound and an alkali metal salt, wherein an acid value of the (meth)acryl-based polymer is 1.0 or lower, and the alkali metal is contained at an amount of less than 0.1 part by weight relative to 100 parts by weight of the (meth)acryl-based polymer.

Description

technical field [0001] The present invention relates to an acrylic resin composition. Furthermore, in more detail, it is related with an antistatic adhesive composition, and the adhesive sheet which used this composition. The pressure-sensitive adhesive sheets of the present invention can be used for plastic products and the like that tend to generate static electricity. Among them, it is particularly suitable as a surface protection film used to protect the surface of optical members such as polarizing plates, wavelength plates, retardation plates, optical compensation films, reflective sheets, and brightness improvement films used in liquid crystal displays and the like. Background technique [0002] In recent years, when optical components and electronic components are transported or mounted on printed circuit boards, they are often transported in a state where each component is wrapped in a predetermined sheet or attached to an adhesive tape. . Among them, surface pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B27/30C08K3/00C09J7/02C09J11/04C09J133/06C09J171/00C09J171/02C09J175/04
CPCC09J171/00C09J133/06C09J7/0217C09J7/385C08L2666/04C08L2666/14C09J133/08C09J7/22C09J11/00C09J133/04C09J2203/318C09J2301/302C09J2301/408
Inventor 天野立巳安藤雅彦
Owner NITTO DENKO CORP
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