Natural rubber latex preservation
    61.
    发明公开
    Natural rubber latex preservation 审中-公开
    Kautschuklatexkonservierung

    公开(公告)号:EP1967530A1

    公开(公告)日:2008-09-10

    申请号:EP07004651.1

    申请日:2007-03-07

    摘要: A method for the preservation of natural rubber latex is disclosed which comprises adding to natural rubber latex at least one hydrophobically modified saccharide in combination with at least one conventional preservative, preferably ammonia.
    The method enables increasing the stability of natural rubber latex by an economically interesting method which does not negatively affect neither subsequent conventional processing of the latex, nor the properties of shaped rubber articles manufactured from the stabilized latex.
    Furthermore, preserved rubber latex is disclosed that is stabilized by the method of the invention. Also preserved non-concentrated as well as concentrated rubber latex is disclosed comprising at least one said hydrophobically modified saccharide in combination with at least one conventional preservative, preferably ammonia.

    摘要翻译: 公开了一种保存天然橡胶胶乳的方法,其包括将至少一种疏水改性的糖与至少一种常规防腐剂(优选氨)一起加入到天然橡胶胶乳中。 该方法能够通过经济上有趣的方法提高天然橡胶胶乳的稳定性,这不会对后续的胶乳的常规加工产生负面影响,也不影响由稳定的胶乳制成的成型橡胶制品的性能。 此外,公开了通过本发明的方法稳定的防腐橡胶胶乳。 还公开了保存的非浓缩以及浓缩橡胶胶乳,其包含至少一种所述疏水改性的糖与至少一种常规防腐剂,优选氨的组合。

    PROCESS FOR PRODUCING ENLARGED LATEX
    64.
    发明授权
    PROCESS FOR PRODUCING ENLARGED LATEX 有权
    用于生产扩胶乳颗粒

    公开(公告)号:EP1245584B1

    公开(公告)日:2007-02-14

    申请号:EP00981707.3

    申请日:2000-12-14

    发明人: SAKABE, Hiroshi

    IPC分类号: C08C1/065 C08F6/18

    摘要: A process for producing a particle-enlarged latex, characterized by (1) causing (a) an anionic surfactant and (b) at least one surfactant selected from the group consisting of cationic surfactants and amphoteric surfactants to be present in a latex, (2) adding as a coagulant/enlarging agent at least one member selected from the group consisting of (i) an inorganic acid, (ii) an organic acid, (iii) a substance which yields an acid in water, (iv) a combination of two or more substances which react with each other to yield an acid, and (v) a substance which yields an acid upon irradiation with actinic rays to the latex in the presence of these surfactants, and (3) causing the acid attributable to the coagulant/enlarging agent to act on the latex to thereby increase the diameter of the particles in the latex; the particle-enlarged latex obtained; a graft copolymer obtained by polymerizing a polymerizable monomer with the particle-enlarged latex; and a resin composition comprising the graft copolymer and a thermoplastic resin.

    Natural rubber master batch, production method thereof, and natural rubber composition
    67.
    发明公开
    Natural rubber master batch, production method thereof, and natural rubber composition 有权
    Naturkautschuk-masterbatch dessen Herstellungsverfahren和und Naturkautschukzusammensetzung

    公开(公告)号:EP1607408A1

    公开(公告)日:2005-12-21

    申请号:EP05014138.1

    申请日:2002-07-22

    IPC分类号: C08C1/04 C08J3/22 C08J3/215

    摘要: A method for producing a natural rubber master batch, which comprises a step for mixing a natural rubber latex with an aqueous slurry having been dispersed with at least one filler selected from the group consisting of carbon black, silica and an inorganic filler represented by the following Formula I:

            nM 1 •xSiO y •zH 2 O     (I)

    wherein M 1 is at least one member selected from the group consisting of metals of aluminium, magnesium, titanium, calcium and zirconium, oxides of the preceding metals, hydroxides of the preceding metals, hydrates of the preceding oxides and hydroxides, and carbonates of the preceding metals; n is an integer of 1 to 5; x is an integer of 0 to 10; y is an integer of 2 to 5; and z is an integer of 0 to 10; wherein (i) the particle size distribution of the filler in the aqueous slurry is 25 µm or less in terms of a volume average particle size (mv) and 30 µm or less in terms of a 90 volume % particle size (D90), and (ii) a 24M4DBP absorption of dried filler recovered from the aqueous slurry is maintained at 93% or more of that of the filler before being dispersed into water.

    摘要翻译: 一种天然橡胶母料的制造方法,其包括将天然橡胶胶乳与已经分散有至少一种选自由炭黑,二氧化硅和无机填料组成的组的填料分散的水性浆料混合的工序 式I:nM 1·xSiO y·zH 2 O其中M 1是选自铝,镁,钛,钙和锆的金属中的至少一种,前述金属的氧化物,前述金属的氢氧化物 ,前述氧化物和氢氧化物的水合物和前述金属的碳酸盐; n为1〜5的整数, x为0〜10的整数; y为2〜5的整数, z为0〜10的整数。 其中(i)填充剂在水性浆料中的粒度分布以体积平均粒径(mv)计为25μm以下,以90体积%粒径(D90)计为30μm以下, ,和(ii)从水性浆料中回收的干燥填料的24M4DBP吸收在分散在水中之前保持在填料的93%以上。

    PROCESS FOR PREPARING POLYMER LATEX RESIN POWDER
    70.
    发明公开
    PROCESS FOR PREPARING POLYMER LATEX RESIN POWDER 有权
    工艺制备聚合物乳胶树脂粉末

    公开(公告)号:EP1425314A1

    公开(公告)日:2004-06-09

    申请号:EP02775561.0

    申请日:2002-09-03

    申请人: LG Chem, Ltd.

    IPC分类号: C08F6/22 C08C1/15

    CPC分类号: C08C1/15 C08F6/22

    摘要: The present invention relates to a process for preparing polymer latex resin powder, and particularly to a process for preparing polymer latex resin powder comprising the steps of coagulating polymer latex and aging it, wherein the process comprises the step of introducing an emulsifier into polymer latex emulsion before coagulation. The polymer latex resin powder prepared by the present invention has 85 wt% or more of particles with diameter of 70~400 §-, each 10 wt% or less of fine powder with less than 70 §- and coarse powder with 400 §- or more, and it has superior bulk density and caking property.