硅氧烷表面活性剂（Ⅲ）（续2）：改性聚二甲基硅氧烷在纺织和纤维工业？…

聚二甲基硅氧烷中少数甲基被特定基团所取代，称之改性聚硅氧烷，它们能使有机溶液的表面张力降低，提高纺织聚合物的可纺性，润滑性和亲水性。由于改性聚硅烷在结构上的多样性，可适用于纺织过程中不同摩擦的要求，在纺织品整理时，它们可作为油相的乳化剂和亲水性的柔软剂，含有硅氧表面活性剂的涂料，对疏水性纺织品有更好的吸附能力。     

硅氧烷表面活性剂(Ⅲ)(续2)──改性聚二甲基硅氧烷在纺织和纤维工业中的应用

聚二甲基硅氧烷中少数甲基被特定基团所取代，称之改性聚硅氧烷。它们能使有机溶液的表面张力降低，提高纺织聚合物的可纺性、润滑性和亲水性。由于改性聚硅氧烷在结构上的多样性，可适用于纺织过程中不同摩擦的要求，在纺织品整理时，它们可作为油相的乳化剂和亲水性的柔软剂。含有硅氧烷表面活性剂的涂料，对疏水性纺织品有更好的吸附能力。     

宇航涂料

题述组合物含有(a)带特有不饱和基团的聚硅氧烷(如乙烯基二甲基封端的聚二甲基硅氧烷)、(b)含有活性Si-H基团的聚硅氧烷(如聚甲基氢硅氧烷)和铂硅氧烷催化剂(如铂-二乙烯     

聚氨酯有机硅匀泡剂的研究及应用

综述了近年来有机硅表面活性剂聚二甲基硅氧烷、聚醚改性聚硅氧烷作为聚氨酯泡沫塑料匀泡剂的研究进展,重点介绍了其主要品种S i─C型聚醚改性聚硅氧烷在无溶剂工艺、催化剂的制备及聚醚配方优化等方面的进展,指出目前提高国产软泡匀泡剂的产品质量是聚氨酯有机硅匀泡剂研究的发展方向。     

油剂及其他助剂

TQ342.720061307直接上油的油剂组成和纤维处理Dow Corning Toray Silicone;WO2004-33555(2004.4.22)(英)该发明是关于直接上油油剂,组成包含:(A)100份聚二甲基硅氧烷或黏度在25℃时为3~70mm2/s的液体石蜡,(B)0.5~100份有机聚硅氧烷树脂,其含有硅烷醇基团和硅键合烷氧基团,所有     

经硅橡胶包覆模制的聚碳酸酯基基材的模制结构

正制品包括:包含含有经丙烯酸酯、羟基或环氧基基团中的一个或多个改性的聚二甲基硅氧烷的一种或多种聚碳酸酯树脂或聚碳酸酯和聚酯树脂的共混物的模制基材以及置于基材的表面或一部分表面上的固化硅橡胶;其中一种或多种聚碳酸酯树脂或聚碳酸酯和聚酯树脂的共混物含有足够量的改性聚二甲基硅氧烷以使剥离强度增加。组合物包含一种或多种聚碳酸酯树脂或聚碳酸酯和聚酯树脂的共混物,     

研发动态

改性有机硅耐高温防腐涂料；水性有机硅改性聚氨酯；γ-甲基丙烯酰氧基烃基硅烷；GE公司推出有效增强轮胎使用功效的NXT硅烷；氨基聚硅氧烷乳液；聚二甲基硅氧烷-梯形苯基硅倍半氧烷。     

化妆品用硅油制剂（续二）

粘度5000000mPa.s以上的聚二甲基硅氧烷用轻质液体异链烷烃，挥发性环硅氧烷或低粘度二甲基硅油溶解配成的硅油溶解液称作复合硅油，复合硅油主工用于护发化妆品，其功能是防止头发开叉及赋予头发梳理性，复合硅油也可由低摩尔质量的α，ω－二羟基聚二甲基硅氧烷在环硅氧烷或低粘度硅油中通过缩聚的方法直接制取。     

专利信息

这一类耐油的硅橡胶胶料的组成是:二甲基硅氧烷—甲基(3,3,3—三氟丙基)硅氧烷—甲基乙烯基硅氧烷共聚物橡胶(内含0.001—5mol%的甲基乙烯基硅氧烷单元)100份,补强填料10—100份,烃类油或双有机基聚硅氧烷油(其中能和橡胶或填料起反应的与硅结合的H和官能基团的总量为≤2per mol)1—80份,以及硫化剂.有一种胶料内含有:一种过氧化物,一种含有二甲基硅氧烷单元79.86mol%、甲基(3,3,3—三氟丙基)硅氧烷单元19.97mol%和甲基乙烯基硅氧     

中国专利

织物及皮革用复合型防水材料　利用石蜡、蜂蜡和有机硅化合物等疏水材料与聚醋酸乙烯酯、聚丙烯酸酯、聚苯乙烯、聚氯乙烯、聚硫和有机硅聚合物以及它们的共混物、共聚物等高分子防水材料 ,进行聚合和共混 ,形成网络型有机复合物 ,经其处理的皮革 ,在 3ｈ内不透水 ,达到了良好的防水效果 ,能满足人们的需要。 /ＣＮ1 2 785 69Ａ聚硅氧烷改性环氧树脂组合物　包括环氧树脂1 0 0份 ,聚醚接枝或嵌段聚二甲基硅氧烷 5～ 60份 ,环氧树脂固化剂 1 4～ 2 6份 ,聚醚接枝或嵌段聚二甲基硅氧烷以 0 2～ 1 0 μｍ粒径均匀分散在环氧树脂组合物中 ,具…     

有机硅氧烷改性VAE乳液的研究

在醋酸乙烯-乙烯共聚乳液（vAE乳液）聚合过程中添加有机硅氧烷单体制备改性VAE乳液。对比分析了不同种类、不同用量的有机硅氧烷对改性vAE乳液性能的影响。确定了有机硅氧烷单体在vAE乳液聚合过程中的最佳添加方式，筛选了聚合引发体系。研究表明，在反应过程中以H2O2--ZFS作为氧化-还原引发体系，选用长链的含水解阻碍官能团的硅氧烷，有机硅氧烷采用后添加的方式，能够合理而有效地控制反应节奏。制备出性能优异的改性VAE乳液。     

硅氧烷表面活性剂（V）（续4）：作为表面改性剂在聚合物中的应用

聚合物的表面性质在许多应用中起着关键性的作用，用最佳性能是在树脂应用时使整体／表面性质达到平衡。有许多方法可以对聚合材料进行表面改性，其中大多数方法是对终产物的表面进行处理。本中我们将阐述特定的含硅氧烷的共聚物，把它们作为表面改性添加剂加入到各种有机聚合物中，它们在加工过程中移到体系表面，从而使聚合物表面得到改性。虽然硅氧烷苯身是疏水性的，但是如果使用含有亲水链节的硅氧烷共聚物也可以得到亲水性的     

硅氧烷改性聚氨酯水分散液

针对聚氨酯水分散液(PUD)胶膜目前存在的耐热、耐水性能的不足,介绍了用聚硅氧烷(PSi)改性的研究进展。综述了硅氧烷改性聚氨酯水分散液(PSi-PUD)的特性、难度及其克服的措施。简略叙述了理论依据。     

Synthesis and characterization of siloxane copolyesters containing phenylindane linkages

A novel series of siloxane copolyesters containing 1,1,3‐trimethyl‐3‐(p‐hydroxyphenyl)‐5‐indanol (phenylindane bisphenol), diphenyl terephthalate (DPT), diphenyl isophthalate (DPI), and eugenol end‐capped siloxanes in varying ratios were prepared at a temperature range of 200–290°C under reduced pressure using dibutyl tin dilaurate catalyst by melt polycondensation. The siloxane‐containing copolyesters were characterized by infrared and ¹H NMR spectroscopy, elemental analysis, solution viscosity, thermogravimetric analysis, differential scanning calorimetry, and X‐ray diffraction. The effect of incorporation of siloxane moiety was studied on the properties of phenyl indane/DPT/DPI coplyester. The glass transition temperatures of copolyesters were decreased from 235 to 124°C by incorporation of 10% eugenol end‐capped siloxane without affecting the thermal properties. All copolyesters were found to be soluble in commonly used organic solvents and had film forming properties. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 2668–2674, 2006     

Mechanical and Dynamic Mechanical Properties of Photocrosslinked Norbornene-Thiol Copolymer Films

A number of novel organic norbornene and norbornene siloxane polymer precursors have been synthesized as part of an on-going research project to produce a non-acrylate, UV-curable adhesive system. These precursors (monomers or oligomers) are di-, tri- and tetra-functional. The crosslinking agent is a multifunctional thiol.

The organic norbornene systems, formulated to stoichiometry, have been characterized using thermal, static and dynamic mechanical analysis. We have found that norbornene ester systems have a range of physical properties, with tensile moduli ranging from 820-2300 MPa (118-350 kpsi), tensile strengths of 17-61 MPa (2.5-8.8 kpsi) and elongations of 4-100%. Glass transition temperatures range from 30-71°C for samples cured at room temperature with a dose of 620 mJ/cm².

Norbornene siloxanes crosslinked with thiol siloxanes have been formulated with increasing levels of a high surface area reinforcing agent. Tensile properties of filled films show that filler loading to 30 wt% significantly increases peak stress and elongation to break above that of 25 wt% filler. The addition of filler did not appear to increase the T_g of the films in this series monotonically. Increased levels of filler were found to produce films with a broadened cold crystallization range and an increased melting temperature.     

生物气中吸附法去除硅氧烷的研究进展

生物气中痕量有机物硅氧烷的存在严重阻碍了生物气作为绿色可再生能源的利用,吸附法是去除半挥发有机物的一种主要方法。本文介绍了吸附法去除生物气中硅氧烷的研究进展,指出吸附剂的选择、铺集硅氧烷方法、定量硅氧烷浓度等是吸附法处理的技术难点。重点分析了活性炭、硅胶、氧化铝、分子筛等吸附剂吸附去除硅氧烷研究现状;比较了撞击器、不锈钢罐、Tedlar 袋等取样方法捕集硅氧烷的优缺点;通过比较GC、GC-MS、FTIR等分析测试量化硅氧烷浓度;并探讨了吸附法去除硅氧烷的吸附机理,指出加强不同吸附剂表面化学研究、研究吸附硅氧烷机理、吸附模型拟合是吸附去除硅氧烷领域的主要研究方向。     

Burning behaviors of selected chlorosilanes and SiH‐containing siloxanes

Chlorosilanes are silanes containing the Si‐Cl functional group and SiH‐containing siloxanes are siloxanes containing the Si‐H functional group. Some chlorosilanes and SiH‐containing siloxanes present potentially high fire or explosion hazards during handling, storage, transport and process operations. Cone calorimeter tests have been used to study the burning behaviors of selected chlorosilanes and SiH‐containing siloxanes at various incident heat fluxes to simulate pool fire burning. The peak heat release rate of a silicon intermediate obtained from the cone calorimeter at 15 kW/m² incident heat flux was very close to that measured by a relatively large‐scale field test. The flammability of monochlorosilanes was similar to that of organic hydrocarbons having comparable volatility. The flammability of chlorosilanes descends in the order of monochlorosilanes, dichlorosilanes and trichlorosilanes. SiH‐containing siloxanes ignited faster than non‐SiH‐containing siloxanes because of the reactive silicon‐hydrogen linkages. The ignition of SiH‐containing siloxanes was much more violent than the ignition of non‐SiH‐containing siloxanes. The SiH‐containing siloxanes exhibited a lower peak heat release rate, less total heat released and a lower peak smoke extinction coefficient compared with non‐SiH‐containing siloxanes having comparable volatility. Copyright © 2004 John Wiley & Sons, Ltd.     

Studies of cyclic and linear poly(dimethyl siloxanes): 13. Static dielectric measurements and dipole moments

The static dielectric permittivities, refractive indices and densities of undiluted oligomeric cyclic and linear dimethyl siloxanes and narrow fractions of cyclic and linear poly(dimethyl siloxanes) have been measured for number-average molar masses M?_n in the range $\text{160 <}\text{M}\text{?}{}_{\mathrm{n}}\text{< 7700}$ at temperatures from 298 to 313 K. Measured total dielectric polarizations have been resolved into their electronic, atomic and orientation components and dipole moments have been derived. The dipole moments of cyclic oligomers ((CH₃)₂SiO)_x (for example, with x = 4, 5) are markedly lower than the dipole moments of the corresponding linear oligomers containing the same number of siloxane bonds. However, for x ? 10, the dipole moments of cyclic dimethyl siloxanes are identical, within experimental error, to those of the corresponding linear dimethyl siloxanes. Measured static dielectric permittivities of the dimethyl siloxanes and poly(dimethyl siloxanes) in solution in cyclohexane are markedly different from the corresponding values for the undiluted siloxanes. These differences are interpreted as resulting from the specific solvent effects.     

Effects of curing,washing, and pre-oxidation on the bonding of monofunctional silanes to polished copper surfaces

Polished Cu surfaces were silylated with trimethylmethoxysilane or trimethylchlorosilane and washed in water to determine the stability of the silane layers. The surfaces were analyzed using X-ray photoelectron spectroscopy (XPS). Methoxysilane was found to remain stably bound during washing, whereas chlorosilane was completely washed away. This confirmed that methoxysilanes were probably bound to surface oxides as hydrogen-bonded Si-O-R species or metal siloxanes, whereas chlorosilanes could only physisorb because they had removed surface oxides and hydroxyl groups. The silane layers were cured at high temperature in vacuum to promote the formation of metal siloxanes from hydrogen-bonded Si-O-R groups. For both silanes, the cured layers were almost completely washed away. The Si-O-R groups in methoxysilane layers were probably converted to less stably bound siloxane dimers during curing. The polished Cu samples were pre-oxidized in an attempt to increase the amount of oxides on the surface and thereby retain chlorosilane. Pre-oxidation converted Cu₂0 to CuO. This did not change the behavior of chlorosilane and reduced the uptake of methoxysilane. Solution and surface reactions are suggested for both silanes. For methoxysilane, silanes or silanols directly hydrogen-bonded to surface oxide or hydroxyl groups are proposed to be the primary species that lead to metal siloxanes.     

Studies of cyclic and linear poly(dimethyl siloxanes): 9. Quasi-elastic light scattering and concentration dependences of diffusion coefficients

The concentration dependences of the diffusion coefficients (D) of linear and cyclic poly(dimethyl siloxanes) (PDMS) in toluene at 298K are reported. Three cyclic/linear pairs of fractions with molar masses in the range 300 to 23 500 g mol^?1 were used. The values of D obtained by quasielastic scattering were in good agreement with those measured by the classical boundary-spreading technique. Analysis of the concentration dependences in terms of the theory of Pyun and Fixman indicates that the solute molecules show a minimum of interpenetration in toluene at 298K.