乳胶漆用有机硅消泡剂

用改性聚硅氧烷和低相对分子质量聚醚形成的嵌段共聚物制备聚醚消泡剂，对乳胶漆进行消泡试验，并进行了性能测试分析。结果显示聚醚改性有机硅消泡剂具有良好的消泡性能。     

烯丙基聚醚与长链烷基共改性硅油的合成

聚醚改性硅油,是在硅氧烷链段上引入聚醚链段,使分子结构中含有疏水基团和亲水基团的一种特殊结构的聚硅氧烷化合物。其中聚硅氧烷部分赋予表面活性剂以耐候、低表面张力、抗静电、生理惰性等特点。通过调节聚醚的氧化乙烯（E沪）、氧化丙烯（PO-）的聚合度及其之比和不同封端，可以获得不同性能、不同用途的表面活性剂。在涂料工业、聚氨酯、农药、日化工业、纺织行业、消泡剂等有很重要的应用，是改性有机硅油中应用最广、品种最多的一类产品。     

聚醚改性硅油消泡剂消泡机理研究

以低含氢硅油和经封端及抗氧化处理的单端烯丙基聚醚为原料,在氯铂酸催化下合成聚醚改性聚硅氧烷;再加入气相法白炭黑和二甲基硅油等复配制得硅膏,制得聚醚改性聚硅氧烷消泡剂。与传统的硅油消泡剂做平行对比实验,引入快、慢消泡剂的概念,发现聚醚改性硅油符合"架桥-拉伸"消泡机理,为快消泡剂;同时,讨论了气相法白炭黑可以促进分散效果提高消泡速率的原因。     

双官能基改性聚有机硅氧烷的合成及应用研究进展

介绍了氨基和聚醚改性聚硅氧烷、氨基和酰氨基改性聚硅氧烷、氨基和长链烷烃改性聚硅氧烷、环氧基和聚醚改性聚硅氧烷及羧基和长链烷烃改性聚硅氧烷等双官能基改性聚有机硅氧烷的特性，简述了合成过程及应用工艺，并对其前景进行了预测。     

聚醚改性聚硅氧烷的合成及应用

聚醚改性聚硅氧烷是通过在活性聚硅氧烷的支链或链端接上聚醚链段而得到的,它广泛应用于纺织,聚氨酯泡沫,化妆品,兴料及聚合物电解质等领域,论文系统地介绍了这类产品的合成工艺,应用情况及最新进展。     

聚醚改性聚硅氧烷消泡剂的合成及性能

以含氢聚硅氧烷与聚醚合成了聚醚改性聚硅氧烷消泡剂，探讨了不同反应条件及复配对转化率和消泡性能的影响。确定了最佳合成条件和复配物：反应条件为100℃∽105℃、10h∽12h、含氢聚硅氧烷与聚醚摩尔比1：2，前者转化率可达80％以上；复配加入质量分数为10％的硅油和质量分数2％的乳化剂，制得的消泡剂可与当前国内外同类消泡剂性能媲美。     

聚醚改性聚硅氧烷非离子型乳化剂

介绍了聚醚改性聚硅氧烷的合成方法，例举了其作为乳化剂在日化个人护理品、消泡剂及光亮剂中的应用。     

抄纸白水消泡剂的制备与应用研究

以高碳醇、植物油脂和消泡颗粒为主消泡成分,聚醚改性聚硅氧烷为增效助剂,磺化油脂、斯潘-80和吐温-80为复合乳化剂体系,制得聚醚改性聚硅氧烷消泡剂。同时探讨了在不同温度下,该消泡剂应用于抄纸白水中的消泡效果。通过与国内外产品对比,自制产品具有更优越的消泡/抑泡和快速消除细微泡沫的能力。     

聚醚改性聚硅氧烷的合成及其在水性涂料消泡剂中的应用

以低含氢硅油和烯丙基聚醚为原料、氯铂酸为催化剂,在无溶剂条件下合成了聚醚改性聚硅氧烷;并将其与硅膏、白炭黑、乳化剂、增稠剂等复配,制成有机硅消泡剂。探讨了加料分式及加料时间、物料配比、催化剂用量、反应温度、反应时间等对反应的影响,以及消泡剂在水性涂料中的应用性能。结果表明,合成聚醚改性聚硅氧烷的最佳工艺为:Si—H与C=C的量之比为1∶1.1、铂的加入量占物料总质量的5×10-6,聚醚滴加时间3 h、反应温度130℃、反应时间6 h,在此条件下活性氢的转化率可达82.8%。由此聚醚改性聚硅氧烷配成的有机硅消泡剂用于水性涂料中,具有优异的消/抑泡性能及良好的体系相容性。     

新型高效的消泡剂

江苏省化工研究所最近研究的聚硅氧烷—聚醚共聚型消泡剂,系采用缩合的方法使聚氧代烷撑分子链和聚硅氧烷分子链以化学键的形式结合而成嵌段共聚型分子结构。是一种淡黄色粘稠状透明液体,具有在水介质中铺展系数大,消泡效力高,适应范围广,能在高温条     

低黄变和亲水性氨基聚硅氧烷的开发

概述了氨基聚硅氧烷的发展历程、特点及发展趋势,着重介绍了氨基聚硅氧烷的黄变机理,低黄变氨基聚硅氧烷、亲水性氨基聚硅氧烷的开发,以及氨基聚硅氧烷的生态环保性。     

Morphology and properties of polydimethylsiloxane-modified epoxy resin

The morphology and fracture toughness of epoxy resins modified with amino-terminated polydimethylsiloxane (ATPDMS), differing in their molecular weight, and the degree of the preliminary reaction in the melt state were investigated. Tetramethyl biphenol diglycidyl ether (TMBPDGE) was used as the base epoxy resin. The degree of preliminary reaction between epoxy and polysiloxane increased with the decrease of the molecular weight of polysiloxane in the melt state. When the low molecular weight polysiloxane (AT900) was mixed with high molecular weight polysiloxane in the preliminary reaction, the low molecular weight polysiloxane enhanced the compatibility between the epoxy resin and the high molecular weight polysiloxane and produced smaller size and narrow distribution of polysiloxane particles. The small and highly concentrated polysiloxane particles, as determined by scanning electron microscopy improved the fracture toughness of the epoxy resin. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 941–955, 1997     

Synthesis of rodlike polysiloxane with hexagonal phase by sol-gel reaction of organotrialkoxysilane monomer containing two amino groups

A higher-ordered polysiloxane was prepared by the sol-gel reaction of (3-(2-aminoethylamino)propyl)trimethoxysilane in a hydrochloric acid aqueous solution without using any surfactants. The X-ray diffraction profile of the resulting polysiloxane showed three peaks with the d-value ratio of 1:1/√3:1/2, indicating that this polysiloxane has a hexagonal phase. The peaks shifted by changing the humidity. Therefore, we estimated that this hexagonal phase came from the stacking of a rodlike polymer with a Si-O-Si framework at the core and ammonium groups extruding outside. The TEM image of the polysiloxane showed a stripe pattern indicating an ordered arrangement. Because one repeating unit of the present polysiloxane has two ammonium groups, the ion-exchange capacity of this polysiloxane and viscosity of its aqueous solution were larger than those of the previous polysiloxane with single-ammonium group.     

石材幕墙用硅酮建筑密封胶的制备研究

以107、甲基二甲氧基封端107和三甲氧基封端107为基础聚合物,以二甲基甲氧基单边封端聚二甲基硅氧烷为新型增塑剂,以碳酸钙为补强填料,制备研究贮存稳定、对石材无污染醇型硅酮密封胶。探讨了聚合物类型、增塑剂添加量以及碳酸钙与基础聚合物配比对密封胶性能的影响。     

多苯基聚硅氧烷对硅橡胶阻尼性能的影响

以低苯基硅橡胶为基胶,通过添加多苯基聚硅氧烷,制备出阻尼硅橡胶,并对其性能进行了研究。结果表明,加入铂催化的多苯基聚硅氧烷能显著提高硅橡胶在-50-150℃温度区域内的阻尼系数;多苯基聚硅氧烷中侧基数量越多,阻尼系数峰值出现的温度越高。加入铂催化的多苯基聚硅氧烷能够显著提高硅橡胶的撕裂强度和断裂伸长率,对硅橡胶的拉伸强度和热稳定性影响不大。两种催化体系合成的多苯基聚硅氧烷对硅橡胶阻尼系数的影响不同,Ph3SiO-接枝率较低时,加入锡催化剂多苯基聚硅氧烷的硅橡胶的阻尼峰值较高;接枝率进一步增加时,加入铂催化多苯基聚硅氧烷的硅橡胶的阻尼系数曲线出现尖峰,而加入锡催化剂多苯基聚硅氧烷的硅橡胶的阻尼峰仍呈现宽峰。     

环氧硅油改性聚氨酯弹性体的制备与表征

以2,4-甲苯二异氰酸酯(TDI)、聚氧化丙烯醚二醇(PPG-1000)为主要原料,以环氧硅油为改性剂,以3,3'-二氯-4,4'-二氨基二苯甲烷(MOCA)为扩链剂,制备了一系列硅油改性聚氨酯弹性体(PUE),并对试样进行了红外光谱、力学性能和耐热老化性能测试.结果表明,添加环氧硅油的PUE的力学性能变差,但老化后的...     

带功能基聚硅氧烷的制备及在日化产品中的应用

阐述了带有聚醚基、氨基、季铵基和烷基等功能基聚硅氧烷的制备方法以及它们各自的特性。介绍了带功能基的聚硅氧烷在日化产品中的应用情况，并对其发展动向进行了预测。     

重防腐涂装工程中三种高档面漆的比较——聚氨酯/氟碳/聚硅氧烷

介绍了当前重防腐涂装工程中聚氨酯、氟碳、聚硅氧烷3种面漆,并从涂料成膜机理、性能、施工等方面作了对比,对环氧聚硅氧烷和丙烯酸聚硅氧烷2种面漆进行了分折。     

Synthesis and Structure of Environmentally Friendly Hybrid Clay/Organosilane Nanocomposite Coatings

Environmentally friendly polysiloxane and clay/polysiloxane composite coatings were synthesized on aerospace-grade aluminum alloy AA2024-T3 substrates from mildly acidified aqueous solution. The polysiloxane coatings were synthesized by acid-catalyzed hydrolysis and condensation of organosilane coupling agents such as glycidoxypropyltrimethoxysilane (GPTMS) and tetramethoxysilane (TMOS) followed by solution drop-casting onto the substrate to form self assembled nanoparticles, coating. The epoxy polysiloxane coating formed by condensation reaction of hydrolyzed TMOS and GPTMS was subsequently cured with aminosilane coupling agent to form cross-linked polysiloxane coating. Clay/polysiloxane coating was formed by dispersing about 0.1–0.3wt% of clay in the hydrolyzed TMOS/GPTMS solution followed by solution casting and the resulting clay/polysiloxane composite coating was subsequently cured with aminosilane coupling agent. The structure and composition of organosilane coupling agents and hybrid polysiloxane coatings were determined by reflection–absorption infrared spectroscopy (RAIR) and X-ray diffraction spectrometry (XRD). The hydrolysis, condensation and curing reactions of TMOS and the organosilane coupling agents were studied by analyzing thin films cast on aluminum alloy substrate after a predetermined reaction time by using RAIR. The XRD results show that the resulting polysiloxanes are semi-crystalline polymers. Wide angle XRD analysis indicated that clay dispersed in clay/polysiloxane composite coating is either highly intercalated or partially exfoliated. This inference was drawn from the disappearance of d₀₀₁ diffraction peak for clay from the XRD spectrum of clay/polysiloxane coatings cured at 100 °C for 2.5 h.