Compartmented thermoplastic pellets
    481.
    发明授权
    Compartmented thermoplastic pellets 失效
    隔热塑料颗粒

    公开(公告)号:US5627218A

    公开(公告)日:1997-05-06

    申请号:US406582

    申请日:1995-03-20

    Inventor: Rexford H. Bradt

    CPC classification number: C08J3/201 B29B9/06 B29B9/12 C08J3/241 C08J5/00 C08J9/16

    Abstract: Apparatus and method for the production of hopper feedable thermoplastic pellets having zones or compartments which contain physically separated reactants which react only after being melt-mixed, as in a screw type extruder, reciproscrew injection machine, or similar device which heat forms pellets into a larger mass. This new class of thermoplastic molding materials relies mainly on the relatively slow reaction kinetics of contained large molecule molding materials to provide a time interval after melt-mixing of zoned pelletized reactants in an extruder barrel or inflection molding machine. During this time period, the thermoplastic molding material is easily filled into injection molds. As the reaction progresses, the material becomes more viscous and such flow is difficult or impossible. The involved reactions may continue after demolding at room temperature during a post molding cure, or appliance service generated heat may cause post molding cure. Where a delayed reaction involves crosslinking and/or additional polymer molecular growth after molding, such crosslinking can bond adjacent molecules and reduce or prevent stress memory warpage of molded parts. Fibrous reinforcements may be included to aid in reducing post molding warpage. Foaming agents contained can, when molded by the Bradt Process, virtually eliminate weld lines in molded parts.

    Abstract translation: 用于生产具有区域或隔室的料斗可进料热塑性粒料的装置和方法,其包含仅在熔融混合后反应的物理分离的反应物,如在螺杆式挤出机,进样机注射机或类似装置中,其将热量形成粒料 质量 这种新型的热塑性成型材料主要依赖于所含的大分子成型材料的相对较慢的反应动力学,以便在挤出机机筒或拐弯成型机中将分区的颗粒状反应物熔融混合后提供时间间隔。 在此期间,热塑性成型材料容易地填充到注射模具中。 随着反应的进行,材料变得粘稠,这种流动是困难的或不可能的。 在后模塑固化期间,室温脱模后所涉及的反应可能继续,或者电器服务产生的热量可能导致后成型固化。 如果延迟反应涉及在模制之后交联和/或额外的聚合物分子生长,则这种交联可以结合相邻分子并减少或防止模制部件的应力记忆翘曲。 可以包括纤维增强材料以帮助减少后成型翘曲。 包含的发泡剂可以在通过Bradt工艺成型时实际上消除模制件中的焊缝。

    Polyorganosiloxanes containing homogeneously distributed fillers
    485.
    发明授权
    Polyorganosiloxanes containing homogeneously distributed fillers 失效
    含有均匀分布的填料的聚有机硅氧烷

    公开(公告)号:US4101499A

    公开(公告)日:1978-07-18

    申请号:US709978

    申请日:1976-07-30

    Applicant: Joachim Herzig

    Inventor: Joachim Herzig

    CPC classification number: C08J3/201 C08K9/06 C08J2383/04

    Abstract: A viscosity-stable composition comprising by weightA. about 20 to 100 parts of a linear polyorganosiloxane of the formula ##STR1## in which R is an optionally substituted hydrocarbon radical with up to 10 C atoms,R.sup.1 has any of the definitions of R and in addition can be an OH radical, andn is a positive integer,B. about 5 to 50 parts of a highly disperse active filler with a surface area of at least 50 m.sup.2 /g,C. about 1 to 5 parts of a modifying agent of the formula(R.sub.3 Si).sub.n Xin whichR is as defined above,X is halogen, OH, OR, S, OOCR, N or NY,Y is hydrogen or any of the definitions of R, andn is 1, 2 or 3, andD. about 0.1 to 10 parts of water (based on (a) + (b) + (c)),Is produced by treating the filler with the modifying agent, in the presence of water, during its incorporation into the polyorganosiloxane. The preferred filler is silica but may also comprise TiO.sub.2, Al.sub.2 O.sub.3, Fe.sub.2 O.sub.3 and/or ZnO. Other additives may also be included.

    Abstract translation: 包含重量百分比的粘度稳定组合物。约20至100份式(Ⅰ)的线性多聚硅氧烷的部分,其中R是具有至多10个C原子的任选取代的烃基,R 1具有R和 另外可以是OH基团,N是一个积极的整数,B.关于5到50个具有最低50 M2 / G,C表面积的高分散活性填料的部件。关于1到5部分的修改 式(R3Si)nX的化合物,其中R如上定义,X​​是卤素,OH,OR,S,OOCR,N或NY,Y是氢或R和N的任何定义IS 1,2或 3,和D.关于0.1至10份水(基于(A)+(B)+(C)),是通过用修改剂处理填料,在水中存在时,在其进入 聚硅氧烷 优选的填料是二氧化硅,但也可以包含TiO 2,Al 2 O 3,Fe 2 O 3和/或ZnO。 也可以包括其它添加剂。

    Process for blending liquid rubber and carbon black
    486.
    发明授权
    Process for blending liquid rubber and carbon black 失效
    液体橡胶和炭黑混合工艺

    公开(公告)号:US4098715A

    公开(公告)日:1978-07-04

    申请号:US713485

    申请日:1976-08-11

    CPC classification number: C08J3/226 C08J3/201 C08J2321/00 C08J2421/00

    Abstract: Carbon black and liquid rubber are blended to form a dispersion by mixing 60 to 150 parts by weight of the carbon black with 100 parts by weight of the liquid rubber to form an initial dispersion of the carbon black in the liquid rubber and diluting the dispersion with additional liquid rubber to prepare a composition having the required carbon black content.

    Abstract translation: 通过将60〜150重量份的炭黑与100重量份的液体橡胶混合来混合炭黑和液体橡胶以形成分散体,以在液体橡胶中形成碳黑的初始分散体,并用 另外的液体橡胶以制备具有所需炭黑含量的组合物。

    Method of dispersing carbon black in liquid elastomers
    487.
    发明授权
    Method of dispersing carbon black in liquid elastomers 失效
    将炭黑分散在液体弹性体中的方法

    公开(公告)号:US3941740A

    公开(公告)日:1976-03-02

    申请号:US444081

    申请日:1974-02-20

    CPC classification number: C08J3/201 C08J2321/00

    Abstract: A low shear method of adequately dispersing carbon black in liquid elastomers by adding the liquid elastomers to a container, adding from 30 parts to about 160 parts by weight per 100 parts of liquid elastomer of an oil beaded carbon black containing from 5 to about 60 parts of oil and from 25 to about 100 parts of carbon black and mixing the compounds to produce a relatively low viscosity carbon black dispersed elastomeric composition.

    Abstract translation: 通过向容器中加入液体弹性体将炭黑充分分散在液体弹性体中的低剪切方法,每100份含有5至约60份的油珠状炭黑的液体弹性体添加30份至约160份 的油和25至约100份的炭黑并混合该化合物以产生相对低粘度的炭黑分散弹性体组合物。

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