| 摘要 |
PURPOSE:The titled composition which can give a high refractive index resin excellent in high-speed moldability, transparency, non-colorability, surface hardness, solvent resistance, heat resistance, etc., comprising specified three kinds of polymerizable monomers. CONSTITUTION:A mixture is radical-polymerized which contains 30-95wt% polymerizable monomer of formula I (wherein R<1> is H or CH3, R<2> is -CH2CH2O- or a group of formula II, X and Y are each Cl, Br, CH3, CH3O, or C6H5O, k and l are 0 or positive integers satisfying the relationship: k+l=1-5 and m is 1-3), 0-70wt% polymerizable monomer of formula III (wherein R<3> is H or CH3, R<4> is a group of formula IV or V, Ar is a bivalent phenol residue, n is 1-3, p is 0-4, p=0 when R<4> is a group of formula IV and n=1 when R<4> is a group of formula V, and 5-30wt% polymerizable monomer, refractive index >=1.450, represented by formula VI (wherein R<5> is H or CH3, R<6> is a q-valent saturated aliphatic hydrocarbon group which may contain an ether, ester, or alcohol group, and q is 2-6).
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