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    • 53. 发明申请
    • Use of a crosslinkable silicone invert emulsion for producing breathable coatings
    • 使用可交联的硅氧烷反相乳液生产透气涂料
    • US20050123689A1
    • 2005-06-09
    • US10503726
    • 2003-02-07
    • Paul BranlardMartial DeruelleYves GiraudNadia Martin
    • Paul BranlardMartial DeruelleYves GiraudNadia Martin
    • D06M11/79D06M13/513D06M15/643D06M15/65D06N3/12C08J7/04
    • C09D183/04D06M15/643D06M15/65D06N3/128Y10T428/31663
    • The invention relates to the general field of silicone coating on various pliable supports, for example textiles, made of synthetic polymers (polyamide, polyester, etc.). An aim of the invention is to propose an effective process for producing coatings that are waterproof and permeable to moisture vapour, on pliable supports, this process allowing an improvement in the moisture vapour-permeability of the silicones while at the same time conserving the waterproofness. The process according to the invention which achieves this aim consists essentially in coating one of the faces of the support with a film formed by a water-in-oil inverse silicone emulsion comprising a continuous oily silicone phase φs, which can be crosslinked into an elastomer and which comprises a polyorganosiloxane (POS) A that is crosslinkable by polyaddition, by polycondensation, by cationic means or by free-radical means; optionally a crosslinking organosilicic compound B; optionally at least one catalyst C, an aqueous phase φa, a stabilizer, and in seeing to it that the silicone phase φs crosslinks and that removal of water occurs. The invention also relates to pliable supports made of polyamide or polyester, that are waterproof and permeable to moisture vapour, obtained by using a water-in-oil inverse silicone emulsion.
    • 本发明涉及在合成聚合物(聚酰胺,聚酯等)制成的各种柔韧载体上的硅酮涂层的一般领域,例如纺织品。 本发明的目的是提出一种在柔韧的支撑物上生产防水和透湿的涂层的有效方法,该方法允许提高硅氧烷的透湿度,同时保持防水性。 实现该目的的根据本发明的方法主要在于用由油包水反相硅氧烷乳液形成的膜涂覆载体的一个表面,所述油包水反相硅氧烷乳液包含连续的油性硅氧烷相phis,其可交联成弹性体 并且其包含通过加聚可交联的聚有机硅氧烷(POS)A,通过缩聚,通过阳离子手段或通过自由基手段进行交联; 任选交联的有机硅化合物B; 任选地至少一种催化剂C,水相phia,稳定剂,并且认为有机硅相交联并发生水的除去。 本发明还涉及通过使用油包水反相硅氧烷乳液获得的由聚酰胺或聚酯制成的柔性支撑体,其是防水的并且是透湿的。
    • 55. 发明申请
    • Low water uptake silicas
    • 低吸水二氧化硅
    • US20050074386A1
    • 2005-04-07
    • US10500107
    • 2002-12-24
    • Remi ValeroYvonick Chevallier
    • Remi ValeroYvonick Chevallier
    • A61K47/04A23L29/294C01B33/193C08K3/36C01B33/12
    • C01B33/193C01P2006/12C01P2006/80C01P2006/82C08K3/36C08L83/04
    • The invention concerns a method for preparing low water uptake precipitated silicas, comprising successive steps which consist in: (a) producing an initial starter including a silicate, the silicate concentration in said starter, expressed in SiO2 equivalent, being less than 15 g/L; (b) bringing the medium pH to a value ranging between 7 and 8 by adding an acidifying agent, (c) in the resulting medium, simultaneously adding a silicate and an acidifying agent the respective amounts of silicate and acidifying agent added in time being specifically such that, during the entire addition (1) the reaction medium pH stays between 7 and 8, and (ii) the silicon concentration in the medium, expressed in SiO2 equivalent, stays below 35 g/L; (d) adding an acidifying agent in the medium resulting from step (c), so as to bring the medium to a pH ranging between 3 and 6.5; and (e) filtering the resulting aqueous silica dispersion, then drying the filter cake obtained at the end of the filtering step. The invention also concerns low water uptake silicas obtained by said method and their use, in particular for reinforcing silicones or polymer or elastomer matrices.
    • 本发明涉及一种制备低吸水沉淀二氧化硅的方法,包括连续步骤,其包括:(a)产生包含硅酸盐的初始起始物,所述起始物中的硅酸盐浓度以SiO 2当量表示,小于15g / L ; (b)通过添加酸化剂使介质pH值达到7〜8,(c)在得到的培养基中,同时加入硅酸盐和酸化剂,分别加入相应量的硅酸盐和酸化剂 使得在整个添加(1)期间,反应介质pH保持在7和8之间,和(ii)以SiO 2当量表示的介质中的硅浓度保持在35g / L以下; (d)在由步骤(c)得到的培养基中加入酸化剂,以使培养基达到3至6.5的pH; 和(e)过滤所得的二氧化硅水溶液,然后干燥在过滤步骤结束时获得的滤饼。 本发明还涉及通过所述方法获得的低吸水二氧化硅及其用途,特别是用于增强硅氧烷或聚合物或弹性体基质。