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    • 1. 发明公开
    • Halogen-containing lens material
    • 含卤素的镜片材料
    • EP0162550A3
    • 1987-07-29
    • EP85302097
    • 1985-03-26
    • KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
    • Sakagami, TeruoMurayama, NaohiroFujii, Yasufumi
    • C08F220/30C08F220/28G02B01/04
    • C08F220/30C08F220/28G02B1/04
    • A lens material having a refractive index n 20 D of at least 1.57 and an Abbe's number v of at least 30, comprising: a copolymer comprising (I) 10 to 85% by weight of a halogen-containing monomer represented by the following formula (1), (II) 15to 90% by weight of a halogen-containing monomer represented by the following formula (2), and (III) 0 to 20% by weight of a monomer copolymerizable with the above mentioned monomers, the composition of the copolymer being based on the total quantity of the monomers (I), (II), and (III):
      wherein: D represents
      in which n represents an integer selected from the group consisting of 0, 1 and 2; each R' represents hydrogen or a methyl group; Y represents CHOH; and r represents 0 or 1; each of X' and X 2 represents, independently from each other, a methyl group in which one through three of the hydrogen atoms are substituted by a member selected from the group consisting of bromine, iodine and a hydroxyl group (OH group), with the proviso that the number of substitution of the OH group is only one; X 3 represents a methyl group in which one through three of the hydrogen atoms are substituted by a member selected from the group consisting of bromine, iodine and D, with the proviso that the number of substitution of D is only one; wherein at least one of X', X 2 , and X 3 contains at least one bromine or iodine; wherein: each R 2 represents hydrogen or a methyl group: p represents an integer selected from the group consisting of 0. 1. 2. and 3; X 4 represents bromine or iodine; and q represents an integer selected from the group consisting of 1, 2.3.4. and 5. An example of the copolymer is 1-methacryloxy-2,2-di (bromomethyl)-3-bromopropane. methacryloxypolyethyoxy-2.4.6- tribromobenzene styrene divinylbenzene having a n 20 D of 1.596 and a v of 3 5 .3.