Preparing shaped structure of polyarylate copolymers having high tensile
elongation at break
    22.
    发明授权
    Preparing shaped structure of polyarylate copolymers having high tensile elongation at break 失效
    制备具有高断裂拉伸伸长率的聚芳酯共聚物的成形结构

    公开(公告)号:US5185116A

    公开(公告)日:1993-02-09

    申请号:US715599

    申请日:1991-06-14

    IPC分类号: B29C55/00 D01F6/84

    摘要: Extruded shaped structures of amorphous polyarylate copolymers, having a tensile elongation at break of at least 80% at 25.degree. C., are made by drawing a molten extrudate of the copolymer at a temperature at least 100.degree. C. above the glass transition temperature of the copolymer.

    摘要翻译: 在25℃下断裂拉伸伸长率至少为80%的无定形多芳基化合物共聚物的挤出成形结构是通过在高于玻璃化转变温度至少100℃的温度下拉伸共聚物的熔融挤出物来制备的, 共聚物。

    Processing aid for polymers
    24.
    发明授权
    Processing aid for polymers 失效
    聚合物加工助剂

    公开(公告)号:US5057575A

    公开(公告)日:1991-10-15

    申请号:US649359

    申请日:1991-02-01

    摘要: Polymer blend composition having improved processibility and comprising:(a) a major portion of a difficultly melt-procesible polymer, and(b) a minor portion of:1 at least an effective amount, to improve processibility, of a fluorocarbon copolymer which at the melt-processing temperature of (a) is either in a melted form if crystalline, or is above its glass transition temperature if amorphous, and(2) at least an effective amount, to improve processibility, of at least one tetrafluoroethylene homopolymer or copolymer of tetrafluoroethylene and at least one monomer copolymerizable therewith, wherein the mole ratio of fluorine to hydrogen is at least 1:1, and which is solid at the melt-processing temperature of (a);masterbatches comprised of the processing aid; and processes utilizing the processing aid.

    摘要翻译: 聚合物共混组合物具有改进的加工性,并且包括:(a)难熔融可聚合物的主要部分,和(b)少量部分:1至少有效量,以提高氟碳共聚物的加工性, (a)的熔融加工温度如果是结晶态,则为熔融形式,或者如果是无定形的,则高于其玻璃化转变温度,和(2)至少有效量,以提高至少一种四氟乙烯均聚物或共聚物的加工性 四氟乙烯和至少一种可与其共聚的单体,其中氟与氢的摩尔比至少为1:1,在(a)的熔融加工温度下为固体; 由加工助剂组成的母料; 以及利用加工助剂的方法。

    Elastomeric compositions
    26.
    发明授权
    Elastomeric compositions 失效
    弹性组合物

    公开(公告)号:US4596855A

    公开(公告)日:1986-06-24

    申请号:US678015

    申请日:1984-12-04

    CPC分类号: C08L27/12 C08L21/00 C08L27/18

    摘要: An elastomeric composition comprising an elastomer matrix having dispersed therein about 3-30 parts per 100 parts by weight of the elastomer of powdered polytetrafluoroethylene having a number average molecular weight of at least about 250,000 and a surface area of at least 1 m.sup.2 /g which has been treated with about 50-120% of sodium-naphthalene addition compound or another addition compound of an alkali metal required for the alkali metal to react with all the fluorine atoms on the surface of the polytetrafluoroethylene powder.By dispersing such treated polytetrafluoroethylene powder in elastomer matrix, one increases significantly the tear strength of the elastomer, while increasing its modulus only moderately. In this way, the processability of the elastomeric compositions is not adversely affected.

    摘要翻译: 一种弹性体组合物,其包含其中分散有约3-30份的弹性体基质,每100重量份数均分子量为至少约250,000的粉末状聚四氟乙烯弹性体和表面积至少为1m 2 / g,其具有 用大约50-120%的钠 - 萘加成化合物或碱金属的另一加成化合物与聚四氟乙烯粉末表面上的全部氟原子反应。 通过将这种处理的聚四氟乙烯粉末分散在弹性体基体中,可以显着提高弹性体的撕裂强度,同时仅适度增加其模量。 以这种方式,弹性体组合物的加工性不受不利影响。

    Core/shell fluoropolymer compositions
    27.
    发明授权
    Core/shell fluoropolymer compositions 失效
    核/壳含氟聚合物组合物

    公开(公告)号:US4469846A

    公开(公告)日:1984-09-04

    申请号:US496537

    申请日:1983-05-20

    CPC分类号: C08F259/08

    摘要: Core/shell fluoropolymer compositions in particulate form, wherein the core is a highly crystalline polymer such as, for example, tetrafluoroethylene, and the shell is an elastomeric fluoropolymer such as, for example, a vinylidene fluoride/hexafluoropropene copolymer, optionally also containing a cure site monomer are outstanding additives for uncured fluoroelastomer compositions, which after curing in the presence of dispersed core/shell fluoropolymers have improved tear strength, tear strength to modulus ratio, and certain other physical properties.

    摘要翻译: 颗粒形式的核/壳含氟聚合物组合物,其中核是高度结晶的聚合物,例如四氟乙烯,壳是弹性体含氟聚合物,例如偏二氟乙烯/六氟丙烯共聚物,任选还含有固化 未固化含氟弹性体组合物的突出添加剂,其在分散的核/壳含氟聚合物存在下固化后具有改善的撕裂强度,撕裂强度与模量比以及某些其它物理性质。