Method for preparing condensation polymers by emulsion polymerization
    1.
    发明授权
    Method for preparing condensation polymers by emulsion polymerization 失效
    通过乳液聚合制备缩聚物的方法

    公开(公告)号:US4355154A

    公开(公告)日:1982-10-19

    申请号:US308961

    申请日:1981-10-06

    CPC分类号: C08G63/06 C08G63/16 C08G63/78

    摘要: Polyesters are prepared by reacting aqueous compositions containing an emulsified hydroxyacid or an emulsified mixture comprising a polyfunctional carboxylic acid or anhydride and a polyfunctional alcohol. The emulsion also contains a suitable polycondensation catalyst. The resultant polyesters are useful as plasticizers and as precursors for alkyd resins and other polymers.

    摘要翻译: 聚酯通过使含有乳化羟基酸的水性组合物或包含多官能羧酸或酸酐和多官能醇的乳化混合物反应来制备。 该乳液还含有合适的缩聚催化剂。 所得聚酯可用作增塑剂和用作醇酸树脂和其它聚合物的前体。

    Method of hydrophobing silica
    4.
    发明授权
    Method of hydrophobing silica 失效
    疏水硅胶的方法

    公开(公告)号:US4950502A

    公开(公告)日:1990-08-21

    申请号:US355853

    申请日:1989-05-19

    IPC分类号: C01B33/149 C08K9/08 C09C1/30

    摘要: A method of producing hydrophobic colloidal silica is disclosed. The method comprises combining an aqueous colloidal silica dispersion, polyorganosiloxane, and anionic surfactant to yield a stable aqueous emulsion of hydrophobic colloidal silica. The emulsion may be further processed by evaporating the water to yield a white material which may be easily ground to a fine powder of hydrophobic colloidal silica. This powder is useful as a reinforcement for silicone rubber.

    摘要翻译: 公开了一种制备疏水胶体二氧化硅的方法。 该方法包括将水性胶体二氧化硅分散体,聚有机硅氧烷和阴离子表面活性剂混合,得到稳定的疏水胶体二氧化硅水溶液。 可以通过蒸发水来进一步处理乳液以产生白色材料,其可以容易地研磨成疏水性胶体二氧化硅的细粉末。 该粉末可用作硅橡胶的增强剂。

    Air curing water base copolymers and method of preparation
    7.
    发明授权
    Air curing water base copolymers and method of preparation 失效
    空气固化水基共聚物及其制备方法

    公开(公告)号:US06177510B1

    公开(公告)日:2001-01-23

    申请号:US09290055

    申请日:1999-04-12

    申请人: John C. Saam

    发明人: John C. Saam

    IPC分类号: C08J300

    摘要: An aqueous dispersion comprising a copolymer which is the polymerization product of a mixture of vinylic monomers wherein from about 5% to about 90% by weight of the vinylic monomers are selected from co-esters of a drying oil acid and an unsaturated &agr;, &bgr;-polymerizable unsaturated carboxylic acid, contains from about 0.5% to about 50% by weight based on the weight of the copolymer of a hydrophobic ester or partial ester of a drying oil acid and a polyol. The copolymer polymerized in the presence of the hydrophobic ester or partial ester is characterized by a relatively low gel content, and by a relatively broad, multi-nodal, molecular weight distribution, including a low molecular weight component which acts as a transient plasticizer and coalescing agent. The aqueous dispersions can be formulated into quick drying coating compositions which form smooth protective films on various substrates, without requiring volatile coalescing agents.

    摘要翻译: 包含共聚物的水分散体,其是乙烯基单体的混合物的聚合产物,其中约5重量%至约90重量%的乙烯基单体选自干性油酸和不饱和的α,β- 基于干性油酸和多元醇的疏水酯或偏酯的共聚物的重量,含有约0.5%至约50%重​​量的可聚合不饱和羧酸。 在疏水酯或偏酯的存在下聚合的共聚物的特征在于相对低的凝胶含量,并且具有相对宽的多节分子量分布,包括作为瞬时增塑剂和聚结的低分子量组分 代理商 水性分散体可以配制成快干涂料组合物,其在各种底物上形成平滑的保护膜,而不需要挥发性聚结剂。

    Stereoregular poly(methyl(3,3,3-trifluoropropyl)-siloxane) polymers and
methods for making
    8.
    发明授权
    Stereoregular poly(methyl(3,3,3-trifluoropropyl)-siloxane) polymers and methods for making 失效
    立体定向聚(甲基(3,3,3-三氟丙基) - 硅氧烷)聚合物和制备方法

    公开(公告)号:US5401822A

    公开(公告)日:1995-03-28

    申请号:US190951

    申请日:1994-02-03

    摘要: The present invention is stereoregular poly{methyl(3,3,3-trifluoropropyl)siloxane} polymers and copolymers and methods for their making. The process involves reacting isomers of 1,3,5-trimethyl-1,3,5-tris(3',3',3'-trifluoropropyl)cyclotrisiloxane in the presence of an aprotic polar promoter and a lithium compound. The lithium compound initiates ring opening and polymerization of the isomers without effecting the steric arrangement of the isomers. Elastomers prepared by cross-linking polymers of the present invention can have sufficient cis 3,3,3-trifluoropropyl substitution to allow the elastomers to strain crystallize and provide reinforcement to the elastomers at typical use temperatures.

    摘要翻译: 本发明是立体配位聚{甲基(3,3,3-三氟丙基)硅氧烷}聚合物及共聚物及其制备方法。 该方法涉及在非质子极性促进剂和锂化合物的存在下使1,3,5-三甲基-1,3,5-三(3',3',3'-三氟丙基)环三硅氧烷的异构体反应。 锂化合物引发异构体的开环和聚合,而不影响异构体的空间排列。 通过本发明的交联聚合物制备的弹性体可以具有足够的顺式3,3,3-三氟丙基取代,以使弹性体在典型的使用温度下变形结晶并提供增强弹性体。

    Precured silicone emulsion and method for preparation
    9.
    发明授权
    Precured silicone emulsion and method for preparation 失效
    预制硅氧烷乳液及​​其制备方法

    公开(公告)号:US4273634A

    公开(公告)日:1981-06-16

    申请号:US94268

    申请日:1979-11-14

    摘要: An aqueous silicone emulsion is described which provides an elastomeric product upon removal of the water under ambient conditions. The emulsion comprises a continuous water phase and a dispersed phase of crosslinked silicone. The silicone phase is the product of radical produced crosslinking of hydroxyl endblocked polydiorganosiloxane. The polydiorganosiloxane is crosslinked after it has been dispersed in water. Preferred polydiorganosiloxanes contain vinyl-substituted siloxane units and can be crosslinked by high energy radiation or the combined action of heat and an organic peroxide.

    摘要翻译: 描述了在环境条件下去除水时提供弹性体产品的水性硅氧烷乳液。 乳液包含连续水相和交联硅氧烷的分散相。 硅氧烷相是羟基封端的聚二有机硅氧烷自由基交联的产物。 聚二有机硅氧烷在分散在水中后交联。 优选的聚二有机硅氧烷含有乙烯基取代的硅氧烷单元,并且可以通过高能量辐射或热和有机过氧化物的组合作用进行交联。

    Silicone emulsion which provides an elastomeric product and methods for
preparation
    10.
    发明授权
    Silicone emulsion which provides an elastomeric product and methods for preparation 失效
    提供弹性体产品的硅氧烷乳液和制备方法

    公开(公告)号:US4221688A

    公开(公告)日:1980-09-09

    申请号:US901052

    申请日:1978-04-28

    IPC分类号: C08J3/03 D21H19/32 C08L83/04

    摘要: A silicone emulsion having a dispersed phase of an anionically stabilized hydroxylated polydiorganosiloxane and a colloidal silica and a continuous phase of water in which the pH is 9 to 11.5 provides an elastomeric product, such as a film or coating, upon removal of the water at ambient conditions. The silicone emulsion can be prepared by adding the colloidal silica to the hydroxylated polydiorganosiloxane in an emulsified state and thereafter adjusting the pH within the range of 9 to 11.5 inclusive with such materials as an organic amine or sodium hydroxide. These emulsions are stable during storage over extended periods of time and will provide elastomeric products. A silicone emulsion can also be prepared as described except the pH is adjusted above 11.5.

    摘要翻译: 具有阴离子稳定的羟基化聚二有机硅氧烷和胶体二氧化硅的分散相的硅氧烷乳液和pH为9至11.5的水的连续相提供了在环境中除去水时提供弹性体产物,例如膜或涂层 条件。 硅氧烷乳液可以通过将乳状态的羟基化聚二有机硅氧烷加入到胶体二氧化硅中,然后用诸如有机胺或氢氧化钠的材料将pH调节在9至11.5的范围内来制备。 这些乳液在长时间储存​​期间是稳定的并且将提供弹性体产品。 还可以按照所述制备硅氧烷乳液,除了将pH调节至11.5以上。