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Active energy ray curable resin composition and optical mirror for automobile headlamp

A curable resin and active energy ray technology, applied in the direction of headlights, synthetic resin layered products, lighting devices, etc., can solve the problems of reduced adhesion of the cured film, hinder deep curing of the coating film, etc., and achieve hardness and weather resistance excellent effect

Active Publication Date: 2018-04-10
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when ultraviolet rays are used as active energy rays to cure this composition, if the concentration of the ultraviolet absorber is high, it will significantly hinder the curing of the deep part of the coating film, so there are problems such as the hardness of the cured film and its contact with the substrate. The problem of reduced adhesion

Method used

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  • Active energy ray curable resin composition and optical mirror for automobile headlamp
  • Active energy ray curable resin composition and optical mirror for automobile headlamp
  • Active energy ray curable resin composition and optical mirror for automobile headlamp

Examples

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Embodiment

[0101] Hereafter, although an Example and a comparative example are given and this invention is demonstrated in more detail, this invention is not limited to the following example unless the summary is exceeded. Also "parts" means "parts by mass".

Synthetic example 1

[0102] Synthesis of urethane acrylate mixture UA-1 (component (B))

[0103] In a flask equipped with a dropping funnel, a reflux condenser, a stirring blade, and a temperature sensor, simultaneously add dicyclohexylmethane-4,4-diisocyanate (trade name: Desmodur W, Sumika Bayer ammonia) as a raw material for (b1) 1310 g (5 moles) of Ester Co., Ltd.) and 0.5 g of di-n-butyltin dilaurate were heated in a water bath until the inner temperature of the flask became 70°C. Next, keeping the inner temperature of the flask at 70° C., while stirring the mixture, 161 g (1 mole) of 4-hydroxy-N-(2-hydroxyethyl)-N-methylbutyramide as the raw material of (b2) and (b3) 1326 g (1.5 mol) of polytetramethylene glycol (trade name: PTG850SN, manufactured by Hodogaya Chemical Industry Co., Ltd.) having a number average molecular weight of 877 (in terms of hydroxyl value) as a raw material was kept at 40° C. , using a dropping funnel with a side tube, it took 3 hours to drop at a constant rate. Fu...

Synthetic example 2

[0104] Synthesis of urethane acrylate mixture UA-2 (component (B))

[0105] In addition to using 80 g (0.5 mol) of 4-hydroxy-N-(2-hydroxyethyl)-N-methylbutyramide as the raw material of (b2), polystyrene with a number average molecular weight of 877 (in terms of hydroxyl value) was used as the raw material of (b3). Except 1768 g (2.0 mol) of tetramethylene glycols, it carried out similarly to the synthesis example 1, and obtained the urethane acrylate mixture UA-2.

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Abstract

The present invention provides an active energy ray-curable resin composition capable of forming a cured film excellent in scratch resistance, hardness, and weather resistance on the surface of a resin molded article for automotive headlamp light distribution mirrors. An active energy ray-curable resin composition for forming a cured film on the surface of a resin molded article for automotive headlight light distribution mirrors, comprising: mono- or polypentaerythritol poly(meth)acrylate having a specific structure Compound (A) 10 to 70% by mass; urethane (meth)acrylic acid having two or more (meth)acryloyloxy groups, one or more amide groups, and two or more urethane bonds 10-50% by mass of an ester compound (B); and 20-80% by mass of a poly[(meth)acryloyloxyalkyl]isocyanurate (C) having a specific structure.

Description

technical field [0001] The present invention relates to an active energy ray-curable resin composition and an automotive headlamp optical lens having a cured film of the composition. Background technique [0002] Synthetic resin molded products containing polymethyl methacrylate resin, polymethacrylimide resin, polycarbonate resin, polystyrene resin, AS (acrylonitrile-styrene) resin, etc., which are lightweight and impact-resistant Because of its excellent properties and high transparency, it is used as plastic parts for automobiles such as various light distribution mirrors, car windows, covers for instruments, and the like. In particular, the synthetic resin molded article is increasingly used as a headlight distribution mirror from the standpoint of weight reduction and design diversification, which contribute to the improvement of automobile fuel economy, and the like. However, because the surface of the synthetic resin molded product has low abrasion resistance, its su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02B32B27/30C08F290/06C09D7/63C09D175/16F21S41/00F21V5/00
CPCC08F220/36C08F222/10C08F290/067C08G18/3825C08G18/4277C08G18/44C08G18/4854C08G18/758C08K5/005C08L33/06C09D4/00C09D7/48C08F222/1065F21S41/28C08G18/672C08G18/6651C08G18/6685C08F222/106B05D1/02B05D1/18B05D1/28B05D1/305C08G18/831C09D151/08
Inventor 宫地彬佐藤宽之
Owner MITSUBISHI CHEM CORP