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Resin composition, adhesive for temporary surface protection, adhesive sheet, and method for producing adhesive sheet

A resin composition and adhesive technology, applied in the direction of film/sheet adhesive, non-polymer adhesive additives, adhesives, etc., can solve the problem of reduced peelability, increased adhesion, and Increased adhesion and other issues, to achieve the effect of shortening the curing period

Inactive Publication Date: 2009-07-22
THE NIPPON SYNTHETIC CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in acrylic adhesives, if only increasing the degree of crosslinking to reduce the peel strength, the increase in adhesive force after pasting becomes a problem. Initial wettability, however, if the degree of crosslinking decreases, there will be disadvantages in terms of physical properties, such as increased adhesive force, especially after heating, and reduced peelability
[0005] In addition, since a large amount of crosslinking agent is used in the existing acrylic adhesive, in order to obtain the desired adhesive properties after coating, it is necessary to perform heating aging or curing for a certain period of time. Long, so there are problems such as increased inventory and delayed delivery at the manufacturing site

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0133] Examples 1 to 4, Comparative Example 1

[0134] According to the mixing composition shown in Table 1, a resin composition solution was prepared.

[0135] A polyethylene terephthalate (PET) sheet (thickness: 38 μm) was used as a substrate, and the obtained resin composition solution was applied so that the thickness after drying was 25 μm, and then dried at 100° C. for 3 minutes. Then, the high-pressure mercury lamp was irradiated with ultraviolet rays (exposure amount described in Table 1), and a release-treated PET sheet was pasted on the surface of the adhesive layer composed of the resin composition for protection, and the adhesive with temporary surface protection was obtained. The adhesive sheet of the mixture.

[0136] [Table 1]

[0137]

Acrylic tree

Fat mixture

(parts) Cracking photopolymerization

Mixing amount of initiator

(parts) Hydrogen abstraction type photopolymerization

Mixing amount of initiator

(parts) Ultraviolet rays

Exposure ...

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PUM

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Abstract

Disclosed is a resin composition for forming an adhesive for temporary surface protection which has adequate release strength and releasability which does not change over time, while leaving no contamination on the object from which it is separated. This resin composition has a reduced curing time. Also disclosed is an adhesive for temporary surface protection which uses such a resin composition. Specifically disclosed is a resin composition for forming an adhesive for temporary surface protection through irradiation of an active energy ray, which contains a resin component and a photopolymerization initiator without containing a polymerizable monomer or a polymerizable oligomer. In this resin composition, the resin component is composed substantially only of an acrylic resin (A) containing no ethylenically unsaturated group. Also specifically disclosed is an adhesive for temporary surface protection which substantially contains only an acrylic resin (A) containing no ethylenically unsaturated group and is obtained by being irradiated with an active energy ray. Further specifically disclosed is an adhesive for temporary surface protection which is obtained by irradiating an acrylic resin composition [I] mainly containing an acrylic resin (A), which contains no ethylenically unsaturated group, with an active energy ray.

Description

Technical field [0001] The present invention relates to adhesives for temporary surface protection films suitable for protecting plastic products and metal products, etc., with moderate adhesion and excellent peelability. Specifically, the present invention relates to adhesives for use as label sheets, tapes, etc. Adhesives for temporary surface protection adhesive sheets for metal plates, glass plates, synthetic resin plates, laminated steel plates, etc., for building materials, packaging materials, and electronic devices, and the adhesive sheets and adhesive sheets Production method. Background technique [0002] The purpose of using the adhesive film for temporary surface protection is to stick it on the surface of adherends such as stainless steel plates, aluminum plates, color steel plates, optical parts such as glass plates, polarizing films, and resin plates such as plastic plates. , During storage, processing, etc., prevent the surface of the adherend from being contamina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00C09J7/02C09J11/06
Inventor 山林晃阿久井敏文
Owner THE NIPPON SYNTHETIC CHEM IND CO LTD
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