PLASTIC LENS

WIPO Patent Application WO/2019/054424

A9

The purpose of the present invention is to provide a plastic lens having excellent heat resistance and durability in which the generation of cracks is suppressed even in a high temperature environment or even when mechanical stress is applied, and having excellent surface hardness and scratch resistance. The present invention provides a plastic lens having a plastic lens base material, a hard coat layer formed on at least one surface of the plastic lens base material, and a vapor deposition coating film formed on at least one surface of the hard coat layer, the plastic lens being characterized in that the hard coat layer is a cured product of a curable composition containing polyorganosilsesquioxane, wherein: said polyorganosilsesquioxane has a constituent unit represented by formula (1); a molar ratio between a constituent unit represented by formula (I) and a constituent unit represented by formula (II) is 5 to 500; the ratio of the constituent unit represented by formula (1) and a constituent unit represented by formula (4) with respect to the total amount (100 mol%) of a siloxane constituent unit is 55-100 mol%; and the number average molecular weight is 1,000-50,000, and the molecular weight dispersion (weight average molecular weight/number average molecular weight) is 1.0-4.0.

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SHIBAMOTO AKIHIRO (JP)
YOSHIMURA TAKASHI (JP)

PCT/JP2018/033898

May 28, 2020

September 06, 2018

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DAICEL CORP (JP)

G02B1/14; G02B1/113; G02B1/115; G02B5/08; G02B5/30; G02C7/10; G02C7/12

GOTO & CO. (JP)

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