Method for the polymerization of water soluble monomers
    5.
    发明授权
    Method for the polymerization of water soluble monomers 失效
    水溶性单体聚合方法

    公开(公告)号:US4361687A

    公开(公告)日:1982-11-30

    申请号:US297100

    申请日:1981-08-28

    CPC分类号: C08F2/38

    摘要: What is disclosed is a method for making a water soluble polymer of low molecular weight which forms aqueous solutions of low viscosity, which method comprises polymerizing an .alpha.,.beta.-unsaturated water soluble monomer or a mixture of such monomers in a concentrated aqueous solution of said monomer or mixture in the presence of a free radical forming initiator and of formic acid or a water soluble salt thereof as a chain transfer agent.

    摘要翻译: 所公开的是制备低分子量水溶性聚合物的方法,其形成低粘度的水溶液,该方法包括将α,β-不饱和水溶性单体或这些单体的混合物聚合在所述 单体或混合物,在自由基形成引发剂和甲酸或其水溶性盐的存在下作为链转移剂。

    Acrylic resins of low hygroscopicity
    8.
    发明授权
    Acrylic resins of low hygroscopicity 失效
    具有低吸湿性的丙烯酸树脂

    公开(公告)号:US4709000A

    公开(公告)日:1987-11-24

    申请号:US894714

    申请日:1986-08-08

    CPC分类号: G11B7/26 C08F220/14

    摘要: Copolymers exhibiting low water absorption and having good optical and mechanical properties, suitable for use in making data storage disks containing optically readable information, said copolymer being at least ternary and comprising(A) methyl methacrylate, and further comonomers selected from at least two of the groups(B) ##STR1## where R' is hydrogen or methyl and R" is hydrogen or alkyl, and (C) ##STR2## where R'" is aliphatic or alicyclic hydrocarbon, and (D) styrene and/or alpha-methyl styrene.

    摘要翻译: 表现出低吸水性并且具有良好的光学和机械性能的共聚物,适用于制备含有光学可读信息的数据存储盘,所述共聚物至少是三元共聚物,并且包含(A)甲基丙烯酸甲酯,以及选自以下的至少两种的共聚单体 (B)其中R'是氢或甲基,R“是氢或烷基,和(C)其中R”是脂族或脂环族烃,和(D)苯乙烯和/或α 甲基苯乙烯。

    Method for making impact resistant molding compositions
    9.
    发明授权
    Method for making impact resistant molding compositions 失效
    制造抗冲击成型组合物的方法

    公开(公告)号:US4521567A

    公开(公告)日:1985-06-04

    申请号:US637863

    申请日:1984-08-06

    CPC分类号: C08F265/04 Y10S525/902

    摘要: A method for making impact resistant molding compositions wherein a hard phase having a glass transition temperature above 25.degree. C. and consisting principally of methyl methacrylate is polymerized at least partially in a first stage, following which the monomers of a rubbery phase whose polymers have a glass transition temperature below 25.degree. C. are added in a second stage and the polymerization is carried to completion, polymerization of the hard phase in the first stage being performed in a presence of an oil soluble free radical initiator and of an organosulfur chain transfer agent having at least two thiol groups in the molecule, and polymerization of the monomers of the rubbery phase in the second stage being carried out with graft crosslinkers in the presence of the previously formed hard phase.

    摘要翻译: 一种制造耐冲击成型组合物的方法,其中玻璃化转变温度高于25℃,主要由甲基丙烯酸甲酯组成的硬相至少部分地在第一阶段聚合,随后其聚合物具有 在第二阶段加入低于25℃的玻璃化转变温度,聚合反应完成,第一阶段的硬相聚合在油溶性自由基引发剂和有机硫链转移剂的存在下进行 在分子中具有至少两个硫醇基团,并且在先前形成的硬相存在下,第二阶段中橡胶相的单体在接枝交联剂下进行聚合。

    Data storage disk
    10.
    发明授权
    Data storage disk 失效
    数据存储盘

    公开(公告)号:US4777632A

    公开(公告)日:1988-10-11

    申请号:US079600

    申请日:1987-07-30

    CPC分类号: G11B7/26 C08F220/14

    摘要: Data storage disks containing optically readable information made from a copolymer having low water absorption and good optical and mechanical properties, said copolymer being at least ternary and comprising(A) methyl methacrylate, and further comonomers selected from at least two of the groups(B) ##STR1## where R' is hydrogen or methyl and R" is hydrogen or alkyl, and (C) ##STR2## where R'" is aliphatic or alicyclic hydrocarbon, and (D) styrene and/or alpha-methyl styrene.

    摘要翻译: 包含由具有低吸水性和良好光学和机械性能的共聚物制成的光学可读信息的数据存储盘,所述共聚物至少是三元组的,并且包含(A)甲基丙烯酸甲酯和另外的共聚单体,所述共聚单体选自组(B)中的至少两个, 其中R'是氢或甲基,R“是氢或烷基,和(C)其中R”是脂族或脂环族烃,和(D)苯乙烯和/或α-甲基苯乙烯。