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Methacrylic acid ester polymer, method for producing same, active energy ray-curable composition, and optical recording medium

A kind of methacrylate, the technology of the production method, applied in the field of active energy ray-curable resin composition, optical recording medium, to achieve the effect of hardness corrosion, high hardness, low warpage

Active Publication Date: 2014-10-22
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a cured product obtained by curing a liquid active energy ray-curable resin composition containing such a urethane acrylate is good in terms of small warpage, but it is relatively soft, so there is room for improvement in terms of hardness.

Method used

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  • Methacrylic acid ester polymer, method for producing same, active energy ray-curable composition, and optical recording medium
  • Methacrylic acid ester polymer, method for producing same, active energy ray-curable composition, and optical recording medium
  • Methacrylic acid ester polymer, method for producing same, active energy ray-curable composition, and optical recording medium

Examples

Experimental program
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Embodiment

[0194] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to this. In addition, below, "part" means a "mass part". In addition, the measurement and evaluation of each physical property were performed by the following methods.

[0195]

[0196] The methacrylate polymer was dissolved in deuterated chloroform, and 1H-NMR measurement was performed using a nuclear magnetic resonance apparatus UNITY INOVA 500 superconducting FT-NMR (trade name) manufactured by Varian. Peaks derived from terminal double bonds were confirmed at 5.5 and 6.2 ppm, identifying the terminal structure.

[0197] The number average absolute molecular weight was measured by GPC-LALLS measurement using HLC-8220GPC manufactured by Tosoh Corporation and TriSEC302TDA manufactured by Viscotek Corporation. The number average degree of polymerization was obtained by dividing the number average absolute molecular weight by the average molecular weight of the...

manufacture example 1

[0226] [Manufacture Example 1] Manufacture of Dispersant 1

[0227] Add 900 parts of deionized water, 60 parts of 2-ethanesulfonate sodium methacrylate, 10 parts of potassium methacrylate and 12 parts of methyl methacrylate into a polymerization device equipped with a stirrer, a cooling pipe, and a thermometer, and stir. The temperature was raised to 50° C. while substituting nitrogen in the polymerization apparatus. 0.08 part of 2,2'- azobis(2-methylpropionamidine) dihydrochlorides were added here as a polymerization initiator, and it heated up to 60 degreeC further. After the temperature was raised, methyl methacrylate was continuously dripped at a rate of 0.24 parts / minute for 75 minutes using a drip pump. After maintaining the reaction solution at 60° C. for 6 hours, it was cooled to room temperature to obtain a dispersant 1 having a solid content of 10% by mass as a transparent aqueous solution.

manufacture example 2

[0228] [Production Example 2] Production of chain transfer agent 1 (transition metal chelate)

[0229] In a synthesis device equipped with a stirring device, cobalt(II) acetate tetrahydrate (Co(OC(=O)CH 3 ) 2 4H 2 O) 2.00 g (8.03 mmol), 3.86 g (16.1 mmol) of benzophenone oxime, and 100 ml of diethyl ether previously deoxygenated by nitrogen bubbling were stirred at room temperature for 2 hours. Next, 20 ml of boron trifluoride diethyl ether complex was added, followed by further stirring for 6 hours. The mixture was filtered, the solid was washed with diethyl ether, and dried for about 12 hours at 20°C and under vacuum conditions below 100Mpa to obtain chain transfer agent 1 (formula ( 1), R 1 ~R 4 is phenyl, X is BF 2 indicated compounds).

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Abstract

A cured product that is reduced in warping and has high hardness can be obtained from an active energy ray-curable resin composition which uses a methacrylic acid ester polymer that has an acid value of 50 mg KOH / g or less and a transition metal content of 1 ppm or less, while containing 80% by mole or more of a polymer that has a double bond-terminated structure represented by formula (1). (In formula (1), R represents an alkyl group, a cycloalkyl group or an aryl group.)

Description

technical field [0001] The present invention relates to a methacrylate polymer having a reactive double bond at the terminal, an active energy ray-curable resin composition using the methacrylate polymer, and an active energy ray-curable resin composition using the same optical recording media. Background technique [0002] In recent years, methacrylate polymers having reactive double bonds at their terminals have attracted attention, and various methods have been proposed as methods for their production. For example, Patent Documents 1 to 3 disclose the use of specific transition metal chelates to produce methacrylate polymers with reactive double bonds at their terminals by catalytic chain transfer polymerization (Catalytic Chain Transfer Polymerization, CCTP method). method. According to this method, a methacrylate polymer having a controlled molecular weight can be efficiently obtained by a suspension polymerization method or the like. [0003] On the other hand, in r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/10C08F2/18C08F2/38C08F2/46C08F290/04
CPCC08F2/38C08F220/14C08F265/06C08F2/18C08F290/062C08F2/20C09D151/00Y10T428/31699C08F220/382C08F220/06C08F2/46C08F20/10C08F290/04C09D133/10C08F18/14
Inventor 泉晋一郎松尾光弘诸冈昌彦小高一义涂师诚司明田佳奈川合绘理
Owner MITSUBISHI CHEM CORP
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