Process for the manufacture of shaped articles by graft polymerization
    1.
    发明授权
    Process for the manufacture of shaped articles by graft polymerization 失效
    通过接枝聚合制造成型制品的方法

    公开(公告)号:US4064198A

    公开(公告)日:1977-12-20

    申请号:US679021

    申请日:1976-04-21

    CPC分类号: C08F255/02

    摘要: Process for the manufacture of shaped articles of a mixture of polystyrene and a copolymer of ethylene with vinyl ester, acrylate or methacrylate. To this end, the said copolymers having a content of from 3 to 40% by weight of unsaturated ester are reacted with monomeric styrene in aqueous suspension in the presence of free-radical polymerization initiators. Whereas a portion of the styrene used is directly grafted onto the ethylene copolymer, the remainder of the polymerized styrene is present in a finely divided state as a homopolymer beside or within the grafted ethylene copolymer. There are obtained homogeneous shaped articles having a styrene content of more than 50% by weight.

    摘要翻译: 用于制造聚苯乙烯和乙烯与乙烯基酯,丙烯酸酯或甲基丙烯酸酯的共聚物的混合物的成形制品的方法。 为此,所述具有3至40重量%不饱和酯含量的共聚物在自由基聚合引发剂存在下与含水悬浮液中的单体苯乙烯反应。 而使用的苯乙烯的一部分直接接枝到乙烯共聚物上,其余的聚合苯乙烯在接枝乙烯共聚物旁边或内部作为均聚物以细分的状态存在。 得到苯乙烯含量大于50重量%的均匀成型制品。

    Process for the manufacture of graft polymers
    2.
    发明授权
    Process for the manufacture of graft polymers 失效
    制备接枝聚合物的方法

    公开(公告)号:US3949019A

    公开(公告)日:1976-04-06

    申请号:US497572

    申请日:1974-08-15

    CPC分类号: C08F255/02

    摘要: Process for the manufacture of graft polymers from copolymers of ethylene with vinyl esters, acrylates or methacrylates by grafting an ethylenically unsaturated carboxylic acid thereto in the presence of a free-radical polymerization initiator. Homogeneous graft copolymers are obtained from which sheeting can be made. To this end, the unsaturated carboxylic acid is first caused to diffuse into the copolymer and the mixture is then extruded at temperatures above the crystallite melting point of the ethylene copolymer.

    摘要翻译: 通过在自由基聚合引发剂存在下将乙烯基不饱和羧酸接枝到乙烯基酯,丙烯酸酯或甲基丙烯酸酯的共聚物上来制备接枝聚合物的方法。 得到均匀的接枝共聚物,可从中制备片材。 为此,首先使不饱和羧酸扩散到共聚物中,然后在高于乙烯共聚物的微晶熔点的温度下挤出该混合物。

    Filaments and fibers and their manufacture
    4.
    发明授权
    Filaments and fibers and their manufacture 失效
    丝和纤维及其制造

    公开(公告)号:US3992341A

    公开(公告)日:1976-11-16

    申请号:US573164

    申请日:1975-04-30

    CPC分类号: D01F6/46

    摘要: Filaments and fibers based on polypropylene or copolymers thereof having a content of from 10 to 90% by weight of bitumen and a process for their manufacture, in which a mixture based on polypropylene or copolymers thereof and containing from 10 to 90% by weight of bitumen is melt-spun and drawn. The filaments and fibers produced in the manner of the invention are suitable for the production of woven and non-woven fabrics for insulating purposes and carpet underlays.

    摘要翻译: 基于聚丙烯的纤维和纤维或其共聚物,其含量为沥青的10至90重量%及其制造方法,其中基于聚丙烯或其共聚物的混合物含有10至90重量%的沥青 被熔纺并拉伸。 以本发明的方式生产的长丝和纤维适于生产用于绝缘目的的织造和非织造织物以及地毯衬垫。

    Flexible elastic polyurethane films a process for their preparation and
their use
    8.
    发明授权
    Flexible elastic polyurethane films a process for their preparation and their use 失效
    柔性弹性聚氨酯薄膜的制备及其应用的过程

    公开(公告)号:US5218058A

    公开(公告)日:1993-06-08

    申请号:US527512

    申请日:1990-05-23

    摘要: The present invention deals with flexible elastic polyurethane films, efficaciously having a thickness from 0.3 to 3 mm, prepared by sintering powdered thermoplastic polyurethanes, having:(a) a melt index of from 50 to 350, measured at 190.degree. C. with a compression force of 21.6 kg, and(b) a Shore A hardness of from 80 to 98, preferably while using from 0.05 to 1 part by weight of powdered aluminum oxide and/or silica gel per 100 parts by weight of said thermoplastic polyurethane, utilizing a heated mold.The polyurethane films are preferably used for coating molded articles used in the interior of motor vehicles.

    摘要翻译: 本发明涉及柔性弹性聚氨酯膜,其有效厚度为0.3至3mm,通过烧结粉末状热塑性聚氨酯制备,其具有:(a)熔体指数为50至350,在190℃下以压缩 力为21.6kg,(b)80至98的肖氏A硬度,优选使用0.05至1重量份的粉末状氧化铝和/或硅胶/ 100重量份的所述热塑性聚氨酯,利用 加热模具。 聚氨酯薄膜优选用于汽车内部使用的涂布模制品。

    Antistatic or electrically conductive thermoplastic polyurethanes:
process for their preparation and their use
    10.
    发明授权
    Antistatic or electrically conductive thermoplastic polyurethanes: process for their preparation and their use 失效
    抗静电或导电的热塑性聚氨酯:其制备方法及其用途

    公开(公告)号:US4526952A

    公开(公告)日:1985-07-02

    申请号:US620430

    申请日:1984-06-14

    IPC分类号: B29C70/88 C08K3/04 H01B1/24

    摘要: Antistatic and/or electrically conductive thermoplastic polyurethanes contain carbon black whose surface area determined by the BET method is from 600 to 1200 m.sup.2 /g, have a dibutylphthalate absorption number of 300 to 450 cm.sup.3 /100 g, a pour density of less than 250 kg/m.sup.3, and an average particle size less than 50 nm.Incorporation of the carbon black into the thermoplastic polyurethane produced by the continuous sheet method takes place at temperatures under the primary melt peak for the crystalline rigid segments, measured by means of differential calorimetry, preferably in an extruder.The products are suitable for preparing films for flat heating elements, antistatic hoses, cables, and profiles.

    摘要翻译: 抗静电和/或导电的热塑性聚氨酯含有炭黑,其表面积由BET法测定为600至1200m2 / g,邻苯二甲酸二丁酯吸收值为300至450cm 3 / 100g,倾倒密度小于250kg / m 3,平均粒径小于50nm。 通过连续片材法生产的热塑性聚氨酯中的碳黑,是通过差示热量法,优选在挤出机中测量的结晶刚性链段的初级熔融峰下的温度下进行的。 该产品适用于制备平面加热元件,抗静电软管,电缆和型材的薄膜。