Process for producing aromatic polyamide film
    2.
    发明授权
    Process for producing aromatic polyamide film 失效
    制备芳香族聚酰胺薄膜的方法

    公开(公告)号:US5587450A

    公开(公告)日:1996-12-24

    申请号:US496878

    申请日:1995-06-30

    摘要: A process for producing an aromatic polyamide film, which comprises the steps of: (a) forming a thin layer of an optically isotropic dope in which an aromatic polyamide is dissolved in a polar amide, (b) immersing the thin layer dope of aromatic polyamide in a polar solvent, other than said polar amide, kept at a temperature not higher than -20.degree. C. to prepare a film, and (c) drying the film. The aromatic polyamide film thus obtained is excellent in transparency. Said process requires neither a step of dissolving an aromatic polyamide in conc. sulfuric acid nor an acid-resistant equipment, and hence, is inexpensive.

    摘要翻译: 一种制备芳族聚酰胺薄膜的方法,包括以下步骤:(a)将芳族聚酰胺溶解在极性酰胺中的光学各向同性涂料的薄层形成,(b)将芳香族聚酰胺的薄层掺杂物 在非极性酰胺以外的极性溶剂中保持不高于-20℃的温度,制备膜,(c)干燥该膜。 由此得到的芳香族聚酰胺薄膜的透明性优异。 所述方法既不需要将芳族聚酰胺溶解在浓缩液中。 硫酸或耐酸设备,因此是便宜的。

    Thermoplastic graft copolymer and process for preparing the same
    3.
    发明授权
    Thermoplastic graft copolymer and process for preparing the same 失效
    热塑性接枝共聚物及其制备方法

    公开(公告)号:US5376730A

    公开(公告)日:1994-12-27

    申请号:US853741

    申请日:1992-06-05

    IPC分类号: C08G81/00 C08G81/02 C08F8/00

    CPC分类号: C08G81/027 C08G81/00

    摘要: There are provided a thermoplastic graft copolymer comprising, as main chain, a polymer having a glass transition temperature of 10.degree. C. or below and, as side chain, an aromatic oligomer having a flow temperature of 100.degree. C. or above; and its preparation process, especially a process wherein an aromatic oligomer containing 50% or more of the structural units represented by the following formula (I): ##STR1## wherein X is O or S; and Ar is ##STR2## wherein R.sup.1 and R.sup.2 are alkyl group of 1-3 carbon atoms or phenyl group, and p and q are an integer of 0-2.The graft copolymer of this invention can be used as a thermal resistant plastic elastomer for heat-resisting hoses, seals, automobile materials, etc.

    摘要翻译: PCT No.PCT / JP90 / 01592 Sec。 371日期:1992年6月5日 102(e)日期1992年6月5日PCT 1990年12月6日PCT PCT。 出版物WO91 / 09074 日期:1991年6月27日。提供了一种热塑性接枝共聚物,其包含作为主链的玻璃化转变温度为10℃或更低的聚合物,并且作为侧链具有流动温度为100℃的芳族低聚物 C.或以上; 特别是其中含有50%以上由下式(I)表示的结构单元的芳族低聚物的方法:其中X为O或S;其中X为O或S; 并且Ar是 ,其中R1和R2是1-3个碳原子的烷基或苯基,p和q是0-2的整数。 本发明的接枝共聚物可用作耐热软管,密封件,汽车材料等的耐热塑料弹性体。

    Star block copolymer from lactam and polyol and process for the
production thereof
    8.
    发明授权
    Star block copolymer from lactam and polyol and process for the production thereof 失效
    来自内酰胺和多元醇的星形嵌段共聚物及其制备方法

    公开(公告)号:US4650608A

    公开(公告)日:1987-03-17

    申请号:US763089

    申请日:1985-08-06

    摘要: A novel star block copolymer represented by the general formula as shown below and a process for the production thereof are described. The copolymer has superior physical properties, particularly impact strength and, furthermore, is reduced in coloration. Thus the copolymer can find numerous uses; for example, it can be used in preparation of fibers, foams, automotive parts, and electrical components. The copolymer is produced by copolymerizing a star-shaped polyether prepolymer and a lactam, said prepolymer being prepared by reacting a star-shaped polyoxyalkylene having at least 3 terminal hydroxy groups and an N-chlorocarbonyl lactam, in the presence of an anionic polymerization catalyst. ##STR1## In this formula, all the symbols are as defined hereinbefore.

    摘要翻译: 对由下述通式表示的新型星形嵌段共聚物及其制造方法进行说明。 共聚物具有优异的物理性能,特别是冲击强度,此外,着色减少。 因此共聚物可以发现许多用途; 例如,它可用于制备纤维,泡沫,汽车部件和电气部件。 共聚物通过使星形聚醚预聚物和内酰胺共聚来制备,所述预聚物通过使具有至少3个末端羟基的星形聚氧化烯和N-氯羰基内酰胺在阴离子聚合催化剂存在下反应来制备。 在该公式中,所有符号如上文所定义。

    Thermoplastic resin composition and preparation thereof
    9.
    发明授权
    Thermoplastic resin composition and preparation thereof 失效
    热塑性树脂组合物及其制备方法

    公开(公告)号:US5563216A

    公开(公告)日:1996-10-08

    申请号:US971833

    申请日:1993-02-19

    CPC分类号: C08L51/06 C08L67/00

    摘要: A thermoplastic resin composition containing (A) a liquid crystalline polyester and a reaction product of (B) a thermoplastic polymer having a crosslinkable functional group and (C) a crosslinking agent, in which a volume ratio of the polyester (A) to the polymer (B) is from 20:80 to 50:50 and the polyester (A) forms a continuous phase, and a method for producing the same. This composition is cheap and has good properties of the liquid crystalline polyester even in a composition range in which a ratio of the liquid crystalline polyester is small.

    摘要翻译: PCT No.PCT / JP92 / 00774 Sec。 371日期:1993年2月19日 102(e)1993年2月19日PCT PCT日期1992年6月17日一种热塑性树脂组合物,其含有(A)液晶聚酯和(B)具有交联性官能团的热塑性聚合物的反应产物和(C) 聚酯(A)与聚合物(B)的体积比为20:80〜50:50,聚酯(A)形成连续相的试剂及其制造方法。 即使在液晶聚酯的比例小的组成范围内,该组合物便宜且具有良好的液晶聚酯性能。