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Resin composition, resin composition for lens and cured product thereof

A resin composition and composition technology, applied in the direction of instruments, optics, optical components, etc., can solve the problems of difficult resin processing, easy deterioration of substrate adhesion, difficult resin molding, etc., and achieve high glass transition temperature , Excellent mold release, high refractive index effect

Inactive Publication Date: 2009-07-29
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in recent years, in order to obtain high-definition pictures, the shape of the lens used in these transparent screens is easily deformed during the process of processing the lens into a finer shape or thinner thickness by applying external force or temperature change to the lens.
[0005] Although these problems can be overcome by increasing the softening point or hardness of UV-curable resins, the adhesion of the resin to the substrate tends to deteriorate and the degree of cure shrinkage becomes high, making it difficult to mold such resins and to Resin machined to exact shape

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2 and 3

[0065] UV-curable resin compositions having the compositions shown in Table 1 were prepared (values ​​are expressed in parts by weight). Each of these compositions was applied to a lens mold to form a film with a thickness of about 50 μm, and an easily bonded PET film (COSMOSHINE A4300, available from Toyobo Co., Ltd.); thickness 100μm) adhered to the composition layer, with a high pressure mercury lamp at 600mJ / cm 2 The irradiance of UV is applied through the PET film side to cure the composition layer, and the cured product is separated from the mold to obtain a prism lens. Performance evaluations were performed on the resin composition and the resulting cured film (prism lens). The results are listed in Table 2.

Embodiment 4

[0120] With 25 parts of dipentaerythritol hexaacrylate as component (A), 19 parts of urethane acrylate obtained in Synthesis Example 1 as component (B), 25 parts of o-phenylphenol monoethoxy acrylate as Component (C), 3 parts of 1-hydroxycyclohexyl phenyl ketone as component (D), 21 parts of phenoxyethyl acrylate and 10 parts of 1,6-hexanediol diacrylate as other components mixed to obtain the resin composition of the present invention. The film obtained by curing the resin composition had a refractive index of 1.556 at 25°C. The resin composition was applied to the lens mold with a film thickness of 100-150 μm, and a MS plate (styrene-methyl methacrylate copolymer) with a thickness of 2.5 mm was adhered to the composition film, which was emitted by a high-pressure mercury lamp. UV, at 600mJ / cm 2 The irradiance of the resin composition was irradiated from the side of the MS plate to cure the resin composition, and the resulting cured product was separated from the mold, ther...

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PUM

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Abstract

Disclosed is a lens-shaped cured product which is excellent in releasability, shape reproducibility and adhesion, while having high refractive index. The lens shape of the cured product is hardly deformed when the cured product is exposed to force or temperature change. Also disclosed is a resin composition having good stability, which enables to obtain such a cured product. Specifically disclosed is a resin composition containing a polyfunctional (meth)acrylate (A) having three or more (meth)acryloyl groups in a molecule, a urethane (meth)acrylate (B) which is a reaction product of a diol compound (b-1) having a molecular weight of 48-1000, an aromatic polyisocyanate (b-2) and a hydroxylated (meth)acrylate (b-3), an o-phenylphenol polyethoxy acrylate (C) having an average repetition number of ethoxy groups of 1-3, and a photopolymerization initiator (D).

Description

technical field [0001] The present invention relates to UV-curable resin compositions and cured products thereof. More particularly, the present invention relates to resin compositions and cured products thereof which are especially suitable for lenses such as Fresnel lenses, lenticular lenses, prism lenses, and microlenses. Background technique [0002] Typically, these types of lenses are formed by methods such as pressing or casting. The pressing method manufactures lenses through a cycle of heating, pressing, and cooling, and thus has low productivity. The casting method has the problem of high production cost. This is because the monomers are introduced into the mold and polymerized requiring multiple molds and longer manufacturing times. In order to overcome these problems, it is proposed to use a UV-curable resin composition (Patent Document 1 and Patent Document 2). [0003] Methods for producing transparent type screens using these UV-curable resin compositions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06G02B1/04
CPCC08G18/672C08G18/3215C08L33/06C08G18/7621C08F290/067C08L75/16G02B1/041C08L33/14C08F290/061C08F290/06C08L2666/04C08F222/1006C08F222/104C08F222/1065
Inventor 清柳典子太田英之设乐律子
Owner NIPPON KAYAKU CO LTD