Thermoplastic resin composition, molded resin articles and polarizer protecting film made by using thr same, and process for production of the articles

A thermoplastic resin, resin molding technology, used in polarizing elements, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of foaming UVA, molding device pollution, exudation, etc., and achieve high UV absorption capacity , Excellent heat resistance, the effect of suppressing foaming

Active Publication Date: 2010-03-24
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with general UVA, foaming or UVA bleeding may occur when molding an acrylic resin composition containing UVA.
In addition, due to the heat applied during molding, UVA evaporates, which may cause the following problems: the ultraviolet absorption ability of the obtained resin molded product is reduced, or the evaporated UVA contaminates the molding equipment, etc.
When the molding temperature is increased, foaming and bleeding are likely to occur, and at the same time, problems associated with the evaporation of UVA (decrease in the ultraviolet absorbing ability of the obtained resin molded product, contamination of the molding equipment due to the evaporated UVA) are likely to occur.

Method used

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  • Thermoplastic resin composition, molded resin articles and polarizer protecting film made by using thr same, and process for production of the articles
  • Thermoplastic resin composition, molded resin articles and polarizer protecting film made by using thr same, and process for production of the articles
  • Thermoplastic resin composition, molded resin articles and polarizer protecting film made by using thr same, and process for production of the articles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0204] 40 parts of methyl methacrylate (MMA), 10 parts of methyl 2-(hydroxymethyl)acrylate (MHMA), 40 parts of methyl methacrylate (MMA), 10 parts of methyl 2-(hydroxymethyl) acrylate (MHMA), As a polymerization solvent, 50 parts of toluene and 0.025 part of antioxidant (Adekas 2112, manufactured by Solectron Industries, Ltd.) were heated to 105°C while blowing nitrogen gas into them. At the start of the reflux with the temperature rise, 0.05 part of tert-amyl peroxide isononanoate (manufactured by Alchemy Yoshitomi, trade name: ルペロツクス570) was added as a polymerization initiator, and at the same time, 0.10 part of isononyl peroxide was added dropwise over 3 hours. The tert-amyl acid was subjected to solution polymerization under reflux at about 105 to 110° C., followed by aging for 4 hours.

[0205] Next, 0.05 parts of 2-ethylhexyl phosphate (Sakai Chemical Industry Co., Ltd., Phoslex A-8) was added to the obtained polymerization solution as a catalyst for the cyclization cond...

Embodiment 2

[0212] Except having changed the injection rate of the UVA solution to 0.1 kg / hour, it was carried out in the same manner as in Example 1 to obtain UVA containing an acrylic resin (A-1) having a lactone ring structure in the main chain and a molecular weight of 700 or more. (B) Particles of the transparent resin composition. The glass transition temperature (Tg) of the resin composition was 127°C.

Embodiment 3

[0214] 41.5 parts of methyl methacrylate (MMA), 6 parts of methyl 2-(hydroxymethyl)acrylate (MHMA), 41.5 parts of methyl methacrylate (MMA), 6 parts of 2-(hydroxymethyl) acrylate (MHMA), 2.5 parts of 2-[2'-hydroxy-5'-methacryloyloxy]ethylphenyl]-2H-benzotriazole (manufactured by Otsuka Chemical Co., Ltd., trade name RUVA-93), 50 parts as a polymerization solvent Toluene, 0.025 parts of antioxidants (made by Asahi Electric Industrial Co., Ltd., アデカスタブ2112), and 0.025 parts of n-dodecyl mercaptan as a chain transfer agent, were heated to 105° C. while blowing nitrogen gas thereinto. At the start of reflux with temperature increase, 0.05 part of tert-amyl peroxy isononanoate (manufactured by Alchemy Yoshitomi, trade name: ルペロツクス570) was added as a polymerization initiator, and at the same time, 0.10 part of isononyl peroxide was added dropwise over 3 hours. The tert-amyl acid was subjected to solution polymerization under reflux at about 105 to 110° C., followed by aging for 4 ho...

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Abstract

A resin composition comprising a thermoplastic acrylic resin and an ultraviolet absorber (UVA), which has excellent heat resistance due to the high glass transition temperature and which is suppressedin blowing and bleed-out even in high-temperature molding and little suffers from problems resulting from the evaporation of UVA, namely, a thermoplastic resin composition which comprises both a thermoplastic acrylic resin and an ultraviolet absorber having a molecular weight of 700 or above and which has a glass transition temperature of 110 DEG C or above. Preferably, the ultraviolet absorber has a hydroxy- phenyltriazine skeleton. Further, preferably, the acrylic resin has in the backbone chain at least one kind of cyclic structures selected from among lactone ring structure, glutaric anhydride structure, glutarimide structure, N-substituted maleimide structure, maleic anhydride structure, and so on.

Description

technical field [0001] The present invention relates to a thermoplastic resin composition suitable as a heat-resistant transparent material, a resin molded article made of the composition, and a polarizer protective film as one of specific examples of the resin molded article. Moreover, this invention relates to the polarizing plate provided with the said protective film, the image display apparatus provided with this polarizing plate, and the manufacturing method of a resin molded article. Background technique [0002] Thermoplastic acrylic resins represented by polymethyl methacrylate (PMMA) (hereinafter, also simply referred to as "acrylic resins") have high light transmittance, excellent optical properties, mechanical strength, moldability, and surface hardness. Because of its excellent balance, it is widely used as a transparent material in various industrial products represented by automobiles and home appliances. In addition, in recent years, the use of optical membe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/00C08K5/3492G02B5/30
CPCC09J175/12C08G18/0823G02B5/208C08G18/12G02B1/04G02B1/105C08G18/664C08K5/3492C08G18/4286G02B5/3033G02B1/14C08L33/08C08G18/3246C08G18/706C08L33/064C08J5/18C08L33/04G02B5/30C08L2666/70
Inventor 中西秀高中昭夫
Owner NIPPON SHOKUBAI CO LTD
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