Moisture resistant polyurethanes derived from non-aromatic diisocyanates
    52.
    发明授权
    Moisture resistant polyurethanes derived from non-aromatic diisocyanates 失效
    衍生自非芳族二异氰酸酯的防水聚氨酯

    公开(公告)号:US4631329A

    公开(公告)日:1986-12-23

    申请号:US802880

    申请日:1985-11-29

    摘要: The reduction in tensile strength exhibited in high humidity environments by "soft" polyurethanes prepared from aliphatic or cycloaliphatic diisocyanates can be substantially reduced if the molar ratio of diisocyanate and chain extender to isocyanate-reactive species other than said chain extender in the reaction mixtures from which said polyurethanes are prepared is at least 4.

    摘要翻译: 在高湿度环境下,由脂肪族或脂环族二异氰酸酯制备的“软”聚氨酯可显着降低拉伸强度,如果反应混合物中二异氰酸酯和扩链剂与除扩链剂之外的异氰酸酯反应性物质的摩尔比 所述制备的聚氨酯至少为4。

    Method of producing elastomeric silicone foam
    53.
    发明授权
    Method of producing elastomeric silicone foam 失效
    生产弹性硅酮泡沫的方法

    公开(公告)号:US4608396A

    公开(公告)日:1986-08-26

    申请号:US825494

    申请日:1986-02-03

    IPC分类号: C08J9/02 C08L83/05 C08J9/14

    CPC分类号: C08J9/02 C08J2383/04

    摘要: A method of producing elastomeric silicone foams from a two-part system is disclosed. The method mixes the ingredients then allows a froth to form and cure at ambient temperature to an elastomeric silicone foam. The method mixes a vinyl-containing polydiorganosiloxane (1), a hydroxylated polydiorganosiloxane (2), a platinum catalyst (3), an organohydrogensiloxane (4) and a profoamer (5). The profoamer is a resinous, benzene-soluble organosiloxane copolymer consisting essentially of SiO.sub.4/2 units, silicone bonded hydroxyl groups, (CH.sub.3).sub.3 SiO.sub.1/2 units, and fluorine-containing units. An embodiment of the method includes a liquified blowing agent and stores the mixture under superatmospheric pressure, forming a foam by releasing the mixture to atmospheric pressure. Another embodiment includes an alcohol in the mixture to provide a foam of lower density. when lauryl alcohol is used and the alcohol is mixed with (1), (3), and (5) before (2) is admixed, the foam has a Bashore resiliency of less than 20.

    摘要翻译: 公开了一种从两部分系统生产弹性硅酮泡沫的方法。 该方法混合成分,然后允许泡沫在环境温度下形成和固化成弹性硅酮泡沫。 该方法混合含乙烯基的聚二有机硅氧烷(1),羟基化聚二有机硅氧烷(2),铂催化剂(3),有机氢硅氧烷(4)和溶剂(5)。 溶剂是基于SiO 4/2单元,硅氧烷键合羟基,(CH3)3SiO1 / 2单元和含氟单元组成的树脂,可溶于苯的有机硅氧烷共聚物。 该方法的一个实施方案包括液化发泡剂并将混合物储存在超大气压下,通过将混合物释放到大气压来形成泡沫。 另一个实施方案包括混合物中的醇以提供较低密度的泡沫。 当使用月桂醇并将醇与(1),(3)和(5)在(2)之前混合时混合时,泡沫的底部弹性小于20。

    Foamable polyorganosiloxane compositions
    54.
    发明授权
    Foamable polyorganosiloxane compositions 失效
    可发泡聚有机硅氧烷组合物

    公开(公告)号:US4555529A

    公开(公告)日:1985-11-26

    申请号:US747217

    申请日:1985-06-21

    IPC分类号: C08J9/14 C08L83/04

    摘要: Polyorganosiloxane foams are prepared by the volatilization of a blowing agent within a polyorganosiloxane composition that is curable by a hydrosilation reaction and includes as a foam stabilizer a resinous polyorganosiloxane comprising trimethylsiloxy units, SiO.sub.4/2 units and a specified class of fluorine-containing siloxane units.

    摘要翻译: 聚有机硅氧烷泡沫体是通过在聚有机硅氧烷组合物中挥发的可制备的聚有机硅氧烷组合物,其通过硅氢化反应可固化,并且包括作为泡沫稳定剂的包含三甲基甲硅烷氧基单元,SiO 4/2单元和特定类别的含氟硅氧烷单元的树脂状聚有机硅氧烷。

    Storage stable, foamable two-part polyorganosiloxane compositions
    55.
    发明授权
    Storage stable, foamable two-part polyorganosiloxane compositions 失效
    储存稳定的,可发泡的两部分聚有机硅氧烷组合物

    公开(公告)号:US4547529A

    公开(公告)日:1985-10-15

    申请号:US715604

    申请日:1985-03-25

    摘要: Polyorganosiloxane foams are obtained by blending, dispensing and curing two-part polyorganosiloxane compositions comprising a liquid hydroxyl endblocked polydimethylsiloxane, a liquid alkyl orthosilicate as the curing agent, a catalytically effective amount of a tin compound, a blowing agent and, as a foam stablilizer, a resinous organosiloxane copolymer comprising trimethylsiloxy units, SiO.sub.4/2 units and a specified class of fluorine-containing organosiloxane units.

    摘要翻译: 聚有机硅氧烷泡沫是通过混合,分配和固化包含液体羟基封端的聚二甲基硅氧烷,原硅酸的液态烷基酯作为固化剂的两部分聚有机硅氧烷组合物,催化有效量的锡化合物,发泡剂和泡沫塑化剂, 包含三甲基甲硅烷氧基单元,SiO 4/2单元和特定类别的含氟有机硅氧烷单元的树脂有机硅氧烷共聚物。

    Foamable organosiloxane compositions
    56.
    发明授权
    Foamable organosiloxane compositions 失效
    可发泡有机硅氧烷组合物

    公开(公告)号:US4518716A

    公开(公告)日:1985-05-21

    申请号:US665272

    申请日:1984-10-26

    摘要: Polyorganosiloxane foams exhibiting a desirable combination of low density, an average cell size between 0.2 and 4 mm and a cell concentration of at least 4 per linear centimeter are obtained by dispensing and curing moisture curable organosiloxane compositions containing a dispersed liquid or gaseous blowing agent and, as a foam stabilizer, a resinous organosiloxane copolymer comprising trimethylsiloxy units, SiO.sub.4/2 units and fluorine-containing organosiloxane units. The polymer portion of the organosiloxane compositions can be a polydimethylsiloxane or a graft copolymer comprising at least 20 mole percent of dimethylsiloxane units in combination with organic units.

    摘要翻译: 通过分配和固化含有分散的液体或气体发泡剂的可湿气固化的有机硅氧烷组合物,获得表现出低密度,平均泡孔尺寸在0.2至4mm和细胞浓度至少为4 /线性厘米的组合的聚有机硅氧烷泡沫, 作为泡沫稳定剂,包含三甲基甲硅烷氧基单元,SiO 4/2单元和含氟有机硅氧烷单元的树脂有机硅氧烷共聚物。 有机硅氧烷组合物的聚合物部分可以是聚二甲基硅氧烷或包含至少20摩尔%的与有机单元组合的二甲基硅氧烷单元的接枝共聚物。

    Oxygen-curable mercaptoorganosiloxane compositions containing both redox
and iron carbonyl compounds and method of forming higher molecular
weight products therefrom
    57.
    发明授权
    Oxygen-curable mercaptoorganosiloxane compositions containing both redox and iron carbonyl compounds and method of forming higher molecular weight products therefrom 失效
    含有氧化还原铁羰基化合物的氧可固化的巯基有机硅氧烷组合物和由其形成较高分子量产物的方法

    公开(公告)号:US4293676A

    公开(公告)日:1981-10-06

    申请号:US99253

    申请日:1979-12-03

    摘要: Compositions, stable in the absence of oxygen, are formed by mixing the following substantially in the absence of oxygen:(A) 100 parts by weight of at least one mercapto-functional organosiloxane containing at least two mercapto-functional substituents per molecule;(B) a catalytic amount of an iron carbonyl compound catalyst selected from the group consisting of Fe(CO).sub.5, Fe.sub.2 (CO).sub.9, Fe.sub.3 (CO).sub.12, dicyclopentadienyldiiron tetracarbonyl, butadieneiron tricarbonyl and cyclohexadieneiron tricarbonyl, preferably from 0.1 to 6 parts by weight of catalyst per 100 parts by weight of part (A);(C) optionally, at least one filler; and(D) 0.1 to 6 parts by weight per 100 parts by weight of a redox compound such as copper (II) sulfate or iron (III) oxide.The compositions polymerize or cure to form higher molecular weight products upon exposure to oxygen. The use of a redox compound appears to increase the cross-link density of the cured composition and results in harder resins and more durable elastomers. An important novel feature of the redox compounds is that their use enables one to formulate compositions which cure to low-modulus elastomers possessing excellent unprimed adhesion to many common substrates such as glass, metal and concrete. Such low-modulus elastomeric compositions are very desirable for use as building sealants.

    摘要翻译: 通过在不存在氧的情况下基本上混合以下物质形成组合物:(A)100重量份至少一种每分子含有至少两个巯基官能的取代基的巯基官能的有机硅氧烷; (B)催化量的选自Fe(CO)5,Fe 2(CO)9,Fe 3(CO)12,二环戊二烯基二铁四羰基,二羰基二羰基三羰基和三羰基环己二烯基铁的羰基羰基化合物催化剂,优选为0.1〜6 (A)100重量份的催化剂重量份; (C)任选的至少一种填料; 和(D)每100重量份氧化还原化合物如硫酸铜(II)或氧化铁(III)0.1至6重量份。

    High strength, extrudable silicone elastomer compositions
    58.
    发明授权
    High strength, extrudable silicone elastomer compositions 失效
    高强度,可挤出的硅橡胶组合物

    公开(公告)号:US4162243A

    公开(公告)日:1979-07-24

    申请号:US904176

    申请日:1978-05-08

    IPC分类号: C08L83/00 C08L83/04 C08L83/07

    摘要: A composition curable to a silicone elastomer is prepared by mixing a triorganosiloxy endblocked polydimethylsiloxane fluid where the triorganosiloxy is dimethylvinylsiloxy or methylphenylvinylsiloxy, a reinforcing silica having a surface treated organosiloxane groups which contain 0.05 to 0.32 percent by weight vinyl, a fluid organohydrogensiloxane, a platinum catalyst and optionally a platinum catalyst inhibitor. The polydimethylsiloxane fluid has a major peak molecular weight of 68,000 to 135,000, a dispersity index greater than 3.8, the lowest molecular weight species between 854 and 3146 and the highest molecular weight species between 174,000 and 370,000. These compositions are readily extrudable under low pressure and cure to high strength elastomers with a high durometer.

    摘要翻译: 通过混合三有机甲硅烷氧基封端的聚二甲基硅氧烷流体,其中三有机甲硅烷氧基是二甲基乙烯基甲硅烷氧基或甲基苯基乙烯基甲硅烷氧基,具有表面处理的有机硅氧烷基团的增强二氧化硅,其含有0.05至0.32重量%的乙烯基,流动有机氢硅氧烷,铂催化剂 和任选的铂催化剂抑制剂。 聚二甲基硅氧烷流体的主峰分子量为68,000至135,000,分散指数大于3.8,最低分子量物种在854和3146之间,最高分子量物种在174,000和370,000之间。 这些组合物在低压下易于挤出并固化成具有高硬度的高强度弹性体。

    Siloxane elastomer prepared from mercaptoorg anopolysiloxanes
    60.
    发明授权
    Siloxane elastomer prepared from mercaptoorg anopolysiloxanes 失效
    由巯基聚硅氧烷制备的硅氧烷弹性体

    公开(公告)号:US4070329A

    公开(公告)日:1978-01-24

    申请号:US756294

    申请日:1977-01-03

    CPC分类号: C08K5/14

    摘要: Mixing mercaptoorganopolysiloxanes, organic peroxide and optionally a filler provides a composition which cures to an elastomer either at room temperature or by heating. The elastomers have tack free surfaces and are useful as sealants and rubber articles.

    摘要翻译: 混合巯基有机聚硅氧烷,有机过氧化物和任选的填料提供在室温下或通过加热固化至弹性体的组合物。 弹性体具有无粘性表面,可用作密封剂和橡胶制品。