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21. 发明授权

US4287316A Transparent resin composition for information signal recording discs 失效
标题翻译：用于信息信号记录盘的透明树脂组合物
公开(公告)号：US4287316A
公开(公告)日：1981-09-01
申请号：US32928
申请日：1979-04-19
申请人： Akira Kaneko , Masaki Ohya , Masayasu Suzuki , Akio Kobayashi
发明人： Akira Kaneko , Masaki Ohya , Masayasu Suzuki , Akio Kobayashi
IPC分类号： C08L51/00 , C08F265/04 , C08F279/02 , C08F291/00 , C08F291/02 , C08L7/00 , C08L21/00 , C08L33/00 , C08L33/02 , C08L33/18 , C08L33/20 , C08L51/02 , C08L51/04 , G11B7/24 , C08L9/02 , C08L33/08
CPC分类号： C08L33/20 , C08F265/04 , C08F279/02 , C08L51/04 , Y10S525/932
摘要： A transparent resin composition comprising (1) 6 to 100% by weight of a nitrile graft copolymer comprising a rubber trunk polymer and a branch polymer grafted thereon, which has been obtained by graft-polymerizing onto the rubber trunk polymer a monomer mixture containing an unsaturated nitrile and a monomer copolymerizable therewith, and (2) 0 to 94% by weight of a random copolymer of an unsaturated nitrile and a monomer copolymerizable therewith, the resin components of the resin composition other than the rubber trunk polymer constituting a matrix resin, wherein(a) said rubber trunk polymer has a glass transition temperature of not higher than 0.degree. C. and constitutes 4 to 25% by weight of the resin composition,(b) the unsaturated nitrile constitutes 25 to 90% by weight of the matrix resin in the resin composition,(c) the difference in the refractive indexes between the rubber trunk polymer and the matrix resin is not more than 0.008, and(d) the resin composition, when molded into a 3 mm-thick plate, has a transmittance in diethyl phthalate of not lower than 95% with respect to the laser rays used.The above described resin composition has excellent transparency and molding fidelity and can be used for molding information signal recording discs, information pits being engraved on one side of each disc, and a metal coating being deposited thereon, the information signals recorded on the information pits being reproducible by irradiation with laser rays from the other side of said disc.
摘要翻译：一种透明树脂组合物，其包含（1）6至100重量％的腈接枝共聚物，其包含橡胶树脂聚合物和接枝在其上的分支聚合物，其通过在橡胶树脂聚合物上接枝聚合而获得的含有不饱和的单体混合物腈和可与其共聚的单体，和（2）0〜94重量％的不饱和腈和可与其共聚的单体的无规共聚物，除了构成基体树脂的橡胶树脂聚合物以外的树脂组合物的树脂组分，其中（a）所述橡胶树脂聚合物的玻璃化转变温度不高于0℃，构成树脂组合物的4〜25重量％，（b）不饱和腈占基体树脂的25〜90重量％在树脂组合物中，（c）橡胶树脂聚合物与基质树脂之间的折射率差不大于0.008，（d）树脂组合物相对于所使用的激光，在邻苯二甲酸二乙酯中的透射率不低于95％。上述树脂组合物具有优异的透明性和成型保真度，可用于模制信息信号记录盘，在每个盘的一侧雕刻的信息坑和沉积在其上的金属涂层，记录在信息坑上的信息信号为通过从所述盘的另一侧的激光射线照射可以再现。

22. 发明授权

US4154778A Process for producing a graft polymer 失效
标题翻译：接枝聚合物的制造方法
公开(公告)号：US4154778A
公开(公告)日：1979-05-15
申请号：US900584
申请日：1978-04-27
申请人： Masaki Ohya , Masayasu Suzuki , Akio Kobayashi
发明人： Masaki Ohya , Masayasu Suzuki , Akio Kobayashi
IPC分类号： C08F279/02 , C08F285/00
CPC分类号： C08F279/02 , C08F285/00
摘要： A process for producing a graft polymer possessing a low gas-permeability and an excellent impact resistance and thermal stability which comprises the steps of:First graft-polymerizing in emulsion 5 to 40 parts by weight of (A) a monomeric mixture comprising 30 to 70% by weight of acrylonitrile and 30 to 70% by weight of at least one acrylic ester having the following formula:CH.sub.2 .dbd.CHCOOR.sub.1 wherein R.sub.1 represents an alkyl group having from 1 to 4 carbon atoms, in the presence of 2 to 30 parts by weight of (B) a trunk copolymer prepared by copolymerizing 50 to 90% by weight of 1,3-butadiene, 10 to 50% by weight of at least one acrylic or methacrylic ester having the following formula:CH.sub.2 .dbd.CR.sub.3 COOR.sub.2 wherein R.sub.2 represents an alkyl group having from 1 to 8 carbon atoms and R.sub.3 represents a hydrogen atom or a methyl group, and 0 to 15% by weight of styrene to form a first branch polymer; and thenGraft-polymerizing in emulsion 40 to 90 parts by weight of (C) a monomeric mixture comprising 50 to 85% by weight of acrylonitrile and 15 to 50% by weight of at least one acrylic ester having the following formula:CH.sub.2 .dbd.CHCOOR.sub.4 wherein R.sub.4 represents an alkyl group having from 1 to 4 carbon atoms, in the presence of 10 to 60 parts by weight of the first branch polymer prepared in the preceding step, to form a second branch polymer and wherein2.0.ltoreq..delta.P.sub.2 -.delta.P.sub.1 .ltoreq.2.70.4.ltoreq..delta.p.sub.3 -.delta.p.sub.2 .ltoreq.0.8 wherein .delta.P.sub.1, .delta.P.sub.2 and .delta.P.sub.3 are solubility parameters of the trunk polymer, the first branch polymer and the second branch polymer, respectively, expressed in terms of (cal/cc).sup.1/2.
摘要翻译：一种生产具有低气体渗透性和优异的耐冲击性和热稳定性的接枝聚合物的方法，其包括以下步骤：

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