Silicone elastomer of high thermal conductivity
    1.
    发明授权
    Silicone elastomer of high thermal conductivity 失效
    硅氧烷弹性体导热性高

    公开(公告)号:US06284829B1

    公开(公告)日:2001-09-04

    申请号:US09590803

    申请日:2000-06-09

    IPC分类号: C08K318

    CPC分类号: C08K3/22 C08K3/36 C08L83/04

    摘要: The polyorganosiloxane composition resulting in a silicone elastomer of high thermal conductivity, which can reach and even exceed 1.2 W/m.K, the elastomer retaining an elongation at break of greater than 30%, comprises at least one functional polyorganosiloxane which crosslinks by a polyaddition or polycondensation reaction or by the radical route, optionally a polyorganohydrosiloxane, a catalyst, optionally a reinforcing filler and a filler intended to increase the thermal conductivity which is present in the composition in the proportion of 35 to 70% by volume with respect to the total composition, this filler comprising at least two groups of particles of very different mean diameters, a first group having a mean particle diameter of between 10 and 40 mm, present in a predominant amount in the filler, and a second group having a mean particle diameter of less than 5 mm.

    摘要翻译: 该聚有机硅氧烷组合物产生导热性高的有机硅弹性体,其可以达到甚至超过1.2W / mK,保持断裂伸长率大于30%的弹性体包括至少一种通过加聚或缩聚交联的官能聚有机硅氧烷 反应或通过自由基途径,任选的聚有机氢硅氧烷,催化剂,任选的增强填料和用于增加组合物中相对于总组合物的35至70体积%的比例存在的热导率的填料, 该填料包含至少两组平均直径非常不同的颗粒组,平均粒径在10至40mm之间的第一组以占主要量的填料形式存在,第二组的平均粒径较小 超过5毫米。

    Organopolysiloxane compositions hardening into translucent elastomers at room temperature in the presence of humidity
    3.
    发明授权
    Organopolysiloxane compositions hardening into translucent elastomers at room temperature in the presence of humidity 失效
    有机聚硅氧烷组合物在室温下在湿度存在下硬化成半透明弹性体

    公开(公告)号:US06777471B1

    公开(公告)日:2004-08-17

    申请号:US09856808

    申请日:2001-08-07

    IPC分类号: C08K55419

    摘要: The invention concerns organopolysiloxane compositions obtainable by the following successive steps: step 1: reacting (i) at least a linear diorganopolysiloxane reagent A comprising a hydroxyl group at each chain end; (2i) and at least a hydroxyl organopolysiloxane resin B having a weight content of hydroxyl group ranging from 0.1 to 10%; (3i) with at least a polyalkoxysilane C; step 2: introducing in the medium of step 1 (6i) a mineral filler G based on amorphous silica and (7i) an efficient amount of a catalyst H consisting of at least one titanium organic derivative; step 3: the resulting mixture is subjected to devolatilization carried out at a pressure less than atmospheric pressure.

    摘要翻译: 本发明涉及通过以下连续步骤获得的有机聚硅氧烷组合物:步骤1:使(i)至少一种在每个链端包含羟基的直链二有机聚硅氧烷试剂A, (2i)和至少一种羟基有机聚硅氧烷树脂B,羟基的重量含量为0.1-10%。 (3i)与至少一个聚烷氧基硅烷C; 步骤2:在步骤1(6i)的介质中引入基于无定形二氧化硅的矿物填料G和(7i)有效量的由至少一种钛有机衍生物组成的催化剂H; 步骤3:将所得混合物在小于大气压的压力下进行脱挥发分。