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    • 2. 发明授权
    • Process for producing vinyl graft copolymer resin
    • 乙烯基接枝共聚物树脂的制备方法
    • US4041108A
    • 1977-08-09
    • US558373
    • 1975-03-14
    • Fusaji ShojiHiroyoshi KokakuHisashi KohkameKoiti Kakefuda
    • Fusaji ShojiHiroyoshi KokakuHisashi KohkameKoiti Kakefuda
    • C08F265/00C08F265/04C08L33/08
    • C08F265/04
    • A process for producing a high impact thermoplastic resin by graft polymerization of an acrylic rubber and a polymerizable vinyl monomer which comprises agglomerating acrylic rubber particles by stirring a mixture of the acrylic rubber latex and the polymerizable vinyl monomer in the presence of a coagulating agent, the particle size of the acrylic rubber particle agglomerate being adjusted to a range of 0.2 to 10 .mu., initiating graft polymerization in the presence of a free radical initiator, adding a surface active agent during the polymerization, continuing the polymerization until demulsification occurs while the particle size of the agglomerate of the acrylic rubber particles and grafted acrylic rubber particles is adjusted to a range of 0.2 to 10 .mu., and then completing the graft polymerization by suspension polymerization method. The process can give a vinyl graft copolymer resin having high gloss and excellent weather resistance without impairing its impact resistance.
    • 一种通过丙烯酸橡胶和可聚合乙烯基单体的接枝聚合制备高冲击热塑性树脂的方法,其包括通过在凝结剂的存在下搅拌丙烯酸橡胶胶乳和可聚合乙烯基单体的混合物而使丙烯酸橡胶颗粒凝聚, 将丙烯酸橡胶颗粒聚集体的粒径调节至0.2〜10μm的范围,在自由基引发剂的存在下引发接枝聚合,在聚合过程中加入表面活性剂,继续进行聚合直至破乳发生,同时颗粒尺寸 的丙烯酸橡胶颗粒和接枝丙烯酸橡胶颗粒的聚集体调节至0.2〜10μm的范围,然后通过悬浮聚合法完成接枝聚合。 该方法可以得到具有高光泽度和优异耐候性的乙烯基接枝共聚物树脂,而不损害其耐冲击性。
    • 6. 发明授权
    • Immobilized enzyme membrane
    • 固定酶膜
    • US4307195A
    • 1981-12-22
    • US80026
    • 1979-09-28
    • Yoshiharu KarasawaHisashi Kohkame
    • Yoshiharu KarasawaHisashi Kohkame
    • C12N11/08B01D57/00B01D69/02B32B5/18C12M1/34C12N11/00C12N11/02C12N11/04C12N11/12C12Q1/00G01N27/333G01N27/40C12M1/40
    • B01D69/144C12N11/02C12Q1/002G01N27/3271
    • An immobilized enzyme membrane for use at the working face of an electrochemical electrode is prepared which comprises an asymmetrical membrane integrally formed from a skin layer substantially incapable of permeating an enzyme therethrough but capable of permeating a gas and a liquid, and a sponge layer having pores containing an enzyme immobilized therein by crosslinking and which pores intercommunicate with one another throughout the sponge layer and provide sufficient porosity for retaining a necessary amount of the enzyme. The immobilized enzyme membrane contains a large amount of enzyme, has good diffusion and permeability, and has stabilized enzyme activity for a prolonged period of time. Additionally, there is obtained a quick response time and good analytical precision when the immobilized enzyme membrane is used at the working face of an electrode of electrochemical measuring instruments.
    • 制备用于电化学电极工作面的固定化酶膜,其包括由基本上不能透过酶穿透其中但能渗透气体和液体的皮肤层整体形成的不对称膜,以及具有孔隙的海绵层 含有通过交联固定在其中的酶,并且这些孔在整个海绵层中彼此相通,并提供足够的孔隙以保持必需量的酶。 固定化酶膜含有大量的酶,具有良好的扩散和渗透性,并且在长时间内具有稳定的酶活性。 另外,当在电化学测量仪器的电极的工作面上使用固定化酶膜时,获得了快速的响应时间和良好的分析精度。