METHACRYLIC ACID ESTER POLYMER, METHOD FOR PRODUCING SAME, ACTIVE ENERGY RAY-CURABLE COMPOSITION, AND OPTICAL RECORDING MEDIUM

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...

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Hauptverfasser: NUSHI SEIJI, ODAKA KAZUYOSHI, MOROOKA MASAHIKO, KAWAI ERI, MATSUO MITSUHIRO, AKEDA KANA, IZUMI SHINICHIROU
Format: Patent
Sprache:eng ; kor
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Zusammenfassung: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.)