Method for producing antistatic surface protective film, and antistatic surface protective film

A technology of surface protection film and manufacturing method, applied in the direction of film/sheet adhesive, conductive paint, film/sheet release liner, etc., to achieve the effect of less pollution

Pending Publication Date: 2020-12-25
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0033] As described above, there is no prior art that solves the technical problem of simultaneously realizing the following requirements as performance requirements for an adhesive layer constituting a surface protection film: (1) obtaining adhesive force at a low peeling speed and a high peeling speed Balance; (2) has anti-pollution properties; (3) has excellent anti-static properties

Method used

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  • Method for producing antistatic surface protective film, and antistatic surface protective film
  • Method for producing antistatic surface protective film, and antistatic surface protective film
  • Method for producing antistatic surface protective film, and antistatic surface protective film

Examples

Experimental program
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preparation example Construction

[0087] The method for preparing the acrylic polymer is not particularly limited, and suitable and well-known polymerization methods such as solution polymerization and emulsion polymerization can be used. Preferably, the weight average molecular weight of the acrylic polymer exceeds 300,000 and is 1 million or less. In addition, the acrylic polymer is an acrylic polymer copolymerized so as not to contain a carboxyl group-containing copolymerizable monomer. The acid value of the acrylic polymer is preferably 0.1 to 1.0. Thereby, anti-pollution performance can be improved. Here, the "acid value" is one of the indicators showing the acid content, and is expressed in mg of potassium hydroxide required to neutralize 1 g of the carboxyl group-containing polymer.

[0088] The adhesive composition of the present embodiment further contains (C) an isocyanate compound having a trifunctionality or higher as a crosslinking agent. (C) As the isocyanate compound having a trifunctionality...

Embodiment 1

[0135] Nitrogen gas was introduced into a reaction apparatus equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen introduction pipe to replace the air in the reaction apparatus with nitrogen. Then, simultaneously add 80 parts by weight of 2-ethylhexyl acrylate, 20 parts by weight of n-butyl methacrylate, 4.5 parts by weight of 8-hydroxyoctyl acrylate, 10 parts by weight of polypropylene glycol monoacrylate Ester (n=12) and solvent (ethyl acetate). Then, 0.1 parts by weight of azobisisobutyronitrile as a polymerization initiator was added dropwise over 2 hours, and reacted at 65° C. for 6 hours to obtain the acrylic polymer solution of Example 1. After adding and stirring 8.5 parts by weight of acetylacetone to this acrylic polymer solution, 2.0 parts by weight of CORONATE HX (isocyanurate body of a hexamethylene diisocyanate compound), 0.1 part by weight of triacetylacetone Titanium and 0.05 parts by weight of a polyether-modified siloxane compound (HLB=...

Embodiment 2～6 and comparative example 1～4

[0137] The adhesive composition of Examples 2-6 and Comparative Examples 1-4 was obtained in the same manner as Example 1 except having adjusted the composition of the adhesive composition of Example 1 to description in Table 1, respectively. In the case of the adhesive composition of Comparative Examples 1 and 2, the compound shown in the "antistatic agent" of Table 2 was further added to the adhesive composition. Moreover, the acrylic polymer of Examples 1-6 and Comparative Examples 1-3 is a copolymer whose weight average molecular weight exceeds 300,000 and is 1 million or less. The acrylic polymer of Comparative Example 4 is a copolymer having a weight average molecular weight of 100,000.

[0138] In each column of Table 1 and "antistatic agent" in Table 2, the total of (A) alkyl (meth)acrylates with alkyl groups having C1 to C10 carbon atoms is 100 parts by weight, and the parts by weight of each component. "(D) / (E)" in Table 2 is a weight part ratio. In addition, in t...

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Abstract

The invention provides an antistatic surface-protective film which has balanced adhesive force at a low peeling speed and a high peeling speed and can achieve both antistatic property and anti-foulingproperty. As a solution, a release film (5) on which a release agent layer (4) containing an antistatic agent is laminated is bonded to the surface of an adhesive layer (2) formed by crosslinking anadhesive composition via the release agent layer (4), and the antistatic agent of the release agent layer (4) is transferred to the surface of the adhesive layer (2). The adhesive composition comprises: (A) an acrylic polymer which is obtained by polymerizing an acrylic polymer and a (meth)acrylic acid ester having at least two or more alkyl groups having C1-C10 carbon atoms in a total of 100 parts by weight of the acrylic polymer; 2-Ethylhexyl acrylate is contained in an amount of 50 parts by weight or more, and one or more monofunctional methacrylate monomers having a homopolymer Tg of 0 DEGC or more are contained in an amount of 5-40 parts by weight in total; (C) an isocyanate compound having a trifunctionality or higher; (D) a crosslinking retarder; (E) a crosslinking accelerator other than a stannide.

Description

technical field [0001] This invention relates to the manufacturing method of the antistatic surface protection film which can be suitably used for surface protection films, such as the surface protection film for polarizing plates, and an antistatic surface protection film. In more detail, it relates to a method for producing an antistatic surface protection film and an antistatic surface protection film which have balanced adhesive force at a low peeling speed and a high peeling speed, and which can achieve both antistatic performance and anti-pollution performance. protective film. Background technique [0002] Conventionally, in the manufacturing process of optical members, such as a polarizing plate which is a member which comprises a liquid crystal display, in order to temporarily protect the surface of an optical member, a surface protection film is bonded. Such a surface protection film is used only in the process of manufacturing an optical member, and when attachin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/30C09J7/40C09J133/08C09J171/02C09J11/06C09J11/08C09D183/04C09D5/20C09D5/24C09D7/65C08F283/06C08F220/18C08F220/20G02B1/14
CPCC09J7/30C09J7/401C09J133/066C09J11/06C09J11/08C09D183/04C09D5/20C09D5/24C09D7/65C08F283/065G02B1/16C09J2467/006C09J2483/005C09J2433/00C08L2205/03C08L71/02C08L71/00C08K5/0091C08F220/1808C08L83/12C08K5/435Y02E60/10C09J7/385C09J7/22C09J133/04C09J11/04C08F220/10C08F220/305C08J7/044C08J5/18C09D7/61C08K5/26
Inventor 长仓毅塚田高士铃木史惠大津贺健太郎吉田弘幸广神萌美宍户启太
Owner FUJIMORI KOGYO CO LTD
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