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    Polyacetal composition
    4.
    发明授权
    Polyacetal composition 失效
    聚缩醛组成

    公开(公告)号：US5043399A

    公开(公告)日：1991-08-27

    申请号：US247483

    申请日：1988-09-21

    申请人： Yoshio Suzuki ,  Tamikuni Komatsu ,  Mikihiko Nakamura ,  Shigeo Shiihashi

    发明人： Yoshio Suzuki ,  Tamikuni Komatsu ,  Mikihiko Nakamura ,  Shigeo Shiihashi

    IPC分类号： C08L59/00 ,  C08L77/00 ,  C08L79/00

    CPC分类号： C08L59/00 ,  C08L77/00 ,  C08L79/00 ,  D01F6/66 ,  D01F6/94

    摘要： There are disclosed a polyacetal composition comprising(A) 70-97% by weight of a polyacetal and(B) 30-3% by weight of a transparent polyamide elastomer represented by the general formula ##STR1## in which PA and G represent the groups specified as in the body of the text;said polyamide elastomer exhibiting a relative viscosity of at least 1.5 in m-cresol at 30.degree. C. and at a polymer concentration of 0.5 g/dl anda 1-mm thick sheet of the polyamide elastomer having a haze of not more than 75%, and streched and oriented polyacetal material using it.

    摘要翻译： 公开了一种聚缩醛组合物，其包含（A）70-97重量％的聚缩醛和（B）30-3重量％的由通式“IMAGE”表示的透明聚酰胺弹性体，其中PA和G表示基团 在文本正文中指定; 所述聚酰胺弹性体在30℃的间甲酚中的相对粘度至少为1.5，聚合物浓度为0.5g / dl，聚酰胺弹性体的1mm厚的雾度不大于75％ ，和使用它的拉伸和取向的聚缩醛材料。

    Transparent polyamide elastomer from carboxy polycaprolactam and poly(tetramethylene oxy)glycol
    5.
    发明授权
    Transparent polyamide elastomer from carboxy polycaprolactam and poly(tetramethylene oxy)glycol 失效
    来自羧基聚己内酰胺和聚（四氢呋喃）二醇的透明聚酰胺弹性体

    公开(公告)号：US4820796A

    公开(公告)日：1989-04-11

    申请号：US1657

    申请日：1986-12-15

    申请人： Yoshio Suzuki ,  Mikihiko Nakamura ,  Atsushi Aoshima

    发明人： Yoshio Suzuki ,  Mikihiko Nakamura ,  Atsushi Aoshima

    IPC分类号： C08G69/44

    CPC分类号： C08G69/44

    摘要： A polyamide elastomer having a structure of dehydration condensate between(A) a polycapramide having a number average molecular weight of 500-5,000 and having carboxyl end groups, which is derived from caprolactam and a dicarboxylic acid having 4-20 carbon atoms selected from aliphatic dicarboxylic acids, alicyclic dicarboxylic acids and aromatic dicarboxylic acids and (B) a polyoxytetramethylene glycol having a number average molecular weight of 800-5,000 or a modified polyoxytetramethylene glycol having a number average molecular weight of 800-5,000 and having, in the molecular chain, the units represented by the general formula--O--R--wherein R is a branched chain alkylene group having 4-20 carbon atoms or a straight chain alkylene group having 5-20 carbon atoms, the units content being 50% by weight or a less; the weight ratio of the component (A) to the component (B) being from 10:90 to 60:40. The said elastomer has a relative viscosity of 1.5 or above in m-cresol (0.5 weight/volume %) at 30.degree. C., a polyamide partition ratio of 0.7-1.3, a Shore hardness of 60 A-50 D, a tensile strength of 150 kg/cm.sup.2 or above, and a cloudiness (haze value) of 75% or below. The elastomer is advantageously usable in hose, tube and the like. The disclosure also includes process for producing such an elastomer.

    摘要翻译： PCT No.PCT / JP86 / 00209 Sec。 一九八六年十二月十五日 102（e）日期1986年12月15日PCT提交1986年4月25日PCT公布。 公开号WO86 / 06390 日本1986年11月6日。一种聚酰胺弹性体，其具有在（A）数均分子量为500〜5000的具有羧基端基的聚己内酰胺之间的脱水缩合物，其由己内酰胺衍生而得的二羧酸， 20个选自脂族二羧酸，脂环族二羧酸和芳族二羧酸的碳原子和（B）数均分子量为800-5,000的聚氧四亚甲基二醇或数均分子量为800-5,000的改性聚氧四亚甲基二醇，并且具有 在分子链中，由通式-OR-表示的单元，其中R是具有4-20个碳原子的支链亚烷基或具有5-20个碳原子的直链亚烷基，单元含量为50％ 重量或更少; 组分（A）与组分（B）的重量比为10:90至60:40。 所述弹性体在30℃下的间甲酚（0.5重量/体积％）中的相对粘度为1.5以上，聚酰胺分配比为0.7〜1.3，肖氏硬度为60A〜50D，拉伸强度 为150kg / cm 2以上，浊度（雾度值）为75％以下。 弹性体有利地用于软管，管等。 本公开还包括生产这种弹性体的方法。

    Distillation process for purifying methyl methacrylate
    6.
    发明授权
    Distillation process for purifying methyl methacrylate 失效

    公开(公告)号：US4518462A

    公开(公告)日：1985-05-21

    申请号：US497783

    申请日：1983-05-25

    申请人： Atsushi Aoshima ,  Yoshio Suzuki ,  Mikihiko Nakamura

    发明人： Atsushi Aoshima ,  Yoshio Suzuki ,  Mikihiko Nakamura

    IPC分类号： C07C69/54 ,  B01D3/36 ,  C07C67/54

    CPC分类号： C07C67/54 ,  Y10S203/20 ,  Y10S203/22

    摘要： In purifying methyl methacrylate by feeding a feed mixture containing methanol, methyl methacrylate and 0.05 to 2% by weight, based on the weight of the methyl Methacrylate, of methyl isobutyrate to a first distillation column, subjecting the same to distillation therein in the presence of a saturated hydrocarbon having 6 or 7 carbon atoms while distilling out said saturated hydrocarbon, the methanol, a small amount of the methyl methacrylate and the methyl isobutyrate through the top of the first distillation column and simultaneously recovering methyl methacrylate freed from methanol and methyl isobutyrate from the bottom of the distillation column, wherein the top distillate is cooled in the decanter to be separated into two layers, the resulting upper layer composed mainly of the saturated hydrocarbon is returned to the first distillation column and the resulting lower layer composed mainly of methanol is fed to a second distillation column in which distillation is conducted while recovering the saturated hydrocarbon dissolved in the lower layer together with a part of the methanol from the top of the second distillation column and sending the same to the decanter, and withdrawing methanol, methyl isobutyrate and a small amount of methyl methacrylate from the bottom of the second distillation column, the methyl methacrylate can be effectively purified in high yield by allowing the saturated hydrocarbon to be present only above the feed stage of the first distillation column to which the feed mixture is fed, cooling the top distillate of the first distillation column to 0.degree.-13.degree. C. in the decanter, providing distillation stages above the feed stage of the second distillation column and conducting distillation while returning a part of the top distillate of the second distillation column to the top of the second distillation column, thereby separating methanol and methyl isobutyrate from methyl methacrylate.