有机硅材料的市场与产品开发（续十七）

详细介绍了ＴＱ型及ＭＱ型硅树脂的组成、配方及涂料工艺，简要介绍了其改性树脂。     

有机硅材料的市场与产品开发(续十七)

详细介绍了ＴＱ型及ＭＱ型硅树脂的组成、配方及涂布工艺，简要介绍了其改性树脂。     

高温硫化硅橡胶胶粘剂的研究

制备了一种有机硅胶粘剂,该胶粘剂主要由苯基硅橡胶与ＭＱ硅树脂组成,对影响该胶粘剂胶接强度的因素进行了研究。结果表明：该胶粘剂对铝有较好的胶接强度,其剪切强度与ＭＱ树脂的结构有很大关系,随ＭＱ树脂用量的增加而提高,催化剂的种类和用量对胶接强度也有影响。另外,该胶粘剂具有优良的耐高温老化性能以及对聚四氟乙烯较好的胶接性能。     

以发展的观念理解和推动TQM活动

本世纪六十年代，日本首创了ＱＣ小组，并逐步完善成为一套全面质量管理（ＴＱＣ）理论，使企业管理进入了一个崭新的阶段。七十年代中国企业从日本引入了ＴＱＣ，在近二十年的生产实践中，得到广泛遥推广和应用，功效卓著，随着国际国内经济形势的不断发 ，ＴＱＣ发展到ＴＱＭ，并于ＩＳＯ９０００结轨，我们只有以不断变换的视角理解和推动ＴＱＭ活动，才能使其在企业管理中发挥其应有的作用。促进企业的滕飞。     

含氟单体改性有机硅封装材料的合成及性能

以含氟单体改性的端乙烯基聚硅氧烷为基础聚合物,通过添加有机硅交联剂、铂金水催化剂及甲基乙烯基硅氧烷（ＭＶＱ）树脂,制备了可用于功率型半导体发光二极管封装的透明有机硅封装材料,并通过傅里叶变换红外光谱、紫外可见光谱、扫描电镜及热重分析等对其结构和性能进行了表征分析。结果表明,当硅氢键与乙烯基的摩尔比为１２５、ＭＶＱ树脂的质量分数为１５％时,所制备含氟有机硅封装材料的力学性能较好,透光率在可见光波长７００ｎｍ处达８５％以上,接触角为９４°（含氟单体质量 分数３％）,且具有较好的耐紫外辐射和耐热性能。     

国内信息

甲基乙烯基ＭＱ硅树脂成都赛立康化工技术公司最近开发出甲基乙烯基ＭＱ硅树脂 (乙烯基摩尔分数约 3 0 % ) ,生产能力为 1 0ｔ/ａ。甲基乙烯基ＭＱ硅树脂用于硅凝胶、加成型液体硅橡胶及特种模具胶等的补强时 ,不仅能提高其力学性能 ,还能使其流动性、透明性大大提高。此外 ,甲基乙烯基ＭＱ硅树脂还可用于有机树脂的改性 ,赋予有机树脂优良的耐候性、耐高低温性能。 (陶云峰 )盖州市化学工业公司通过ＩＳＯ 90 0 2认证盖州市化学工业有限责任公司 (原盖州化工厂 )作为国内最早、也是最大的ＫＨ 5 5 0生产厂 ,于 2 0 0 1年 3月 2 2日通过了Ｉ…     

预处理短纤维对VMQ/EPDM共混导电橡胶某些性能的影响

研究了预处理短纤维用量对乙炔炭黑填充甲基乙烯基硅橡胶（ＶＭＱ）／ＥＰＤＭ共混硫化胶拉伸、撕裂、耐屈挠疲劳和导电性能的影响。实验结果表明，加入适量短纤维对ＶＭＱ／ＥＰＤＭ体系有一定的补强作用；纤维用量较大时，导电性能下降。加入４．０份左右的预处理短纤维，可使ＶＭＱ／ＥＰＤＭ共混导电橡胶获得良好的物理机械性能和导电性能     

透明高抗冲型MBS树脂制备技术

介绍了聚氯乙烯（ＰＶＣ） 透明高抗冲型改性剂ＭＢＳ 树脂（ＱＩＭ０３ 牌号） 的特性、制备方法及工业试验结果,从理论和试验两方面阐述了影响树脂性能的主要因素和控制方法。所生产的ＭＢＳ树脂主要物性指标已达到国外同类产品水平。     

界面区结构对水泥砂浆强度的影响

在研究具有水硬性表面层和惰性内核复合结构的深加工处理石英集料对砂浆界面区结构的改进效果，比较深加工处理石英砂浆（ＭＴＱＳ）、普通石英砂浆（ＭＱＳ）和硬化水泥浆体（ＨＣＰ）等３种试样强度随养护时间变化的基础上，研究了界面区结构对水泥砂浆强度的影响．结果表明：使用深加工处理石英集料能有效地改进界面区薄弱结构；界面区结构对水泥砂浆的早期强度影响较小，但对后期强度影响较大；改进界面区结构能大幅度提高水泥砂浆的抗压强度和抗折强度．     

MVQ/EPDM共混改性用于生产耐热水蒸气橡胶制品的研究

研究了硫化剂、相容剂、炭黑及共混比对 Ｍ Ｖ Ｑ／ Ｅ Ｐ Ｄ Ｍ 共混物力学性能的影响。提出了耐热水蒸气橡胶制品的合理配方, 指出了提高共混胶的相容性及共硫化是获得优异性能产品的关键。     

水玻璃法制备MQ硅树脂的研究及应用进展

MQ硅树脂是一类特殊的聚硅氧烷树脂,具有良好的粘结性、耐热性、耐候性、柔韧性等性能,在工业上有很大的应用价值。简单介绍了水玻璃法制备MQ硅树脂的原理及工艺,并重点介绍前人在原料的选择、投料顺序、溶剂、催化剂、萃取剂、工艺条件等方面的研究改进。综述了MQ硅树脂在有机硅压敏胶、硅橡胶、LED封装材料以及其它方面的应用进展。最后,总结了水玻璃法制备MQ硅树脂存在的问题及今后产业化应注意的问题。     

有机硅压敏胶的研制

采用价格低廉的水玻璃制备MQ硅树脂,通过对硅树脂体系引入苯基、乙烯基提高压敏胶的综合性能,研究MQ硅树脂的合成与压敏胶的制造工艺,制备出高性能的有机硅压敏胶。     

MQ硅树脂增强缩合型室温硫化硅橡胶

对用 Ｍ Ｑ 硅树脂增强缩合型双组分室温硫化硅橡胶进行了研究。结果表明： 增强效果主要决定于 Ｍ Ｑ 硅树脂的结构,包括 Ｍ／ Ｑ（ 摩尔比） 和硅羟基的质量分数。 Ｍ／ Ｑ 决定了硅树脂和硅橡胶的相容性,而硅羟基决定了硅树脂和硅橡胶之间的化学结合程度。随着 Ｍ／ Ｑ 的增加,两者的相容性变好。随着硅羟基质量分数的增加,化学结合程度增加。当 Ｍ Ｑ 硅树脂的 Ｍ／ Ｑ 为０ ．８ ,又有适当的硅羟基质量分数时,增强效果最好。     

Synthesis and characterization of MQ silicone resins

MQ silicone resins, which represent a broad range of hydrolytic condensation products of monofunctional silane (M) and tetrafunctional silane (Q), were synthesized by reaction of water glass with hexamethyldisiloxane. The optimum reaction time and the optimal reaction temperature is 30 min and 30–40°C, respectively. Concentrated hydrochloric acid is the best one among those catalysts tested. In large-scale experiments (420–1680 mL), the favorable feeding order is catalyst first, and then water glass, the mixture of hexamethyldisiloxane and ethanol last and most MQ silicone resin was observed. The structure of MQ silicone resin was characterized by FT-IR and GPC spectra. The MQ silicone resin shows narrow molecular weight distribution and the number average molecular weight of MQ silicone resin is 2917. The silicone pressure sensitive adhesive prepared from as-synthesized MQ resin has good tack (29#) and 180° peel adhesion (5.630N/20 mm). © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Synthesis of MQ silicone resins through hydrolytic condensation of ethyl polysilicate and hexamethyldisiloxane

MQ silicone resins were synthesized through hydrolytic condensation of ethyl polysilicate and hexamethyldisiloxane. The structure of the MQ resins was characterized by NMR and GPC. The concentration of an acid catalyst was essential for the capping of functional groups with the monofunctional units. The acid-catalyzed resins had a narrow molecular weight distribution. After postcondensation catalyzed by a base, the molecular weight distribution became bimodal. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 1753–1757, 1998     

MQ树脂对加成型RTV有机硅灌封胶补强性能研究

采用正硅酸酯水解法制备了含乙烯基单元的MQ树脂、含二官能团D单元的MDQ树脂和含三官能团T单元的MTQ树脂,并以此作为加成型RTV(室温硫化)有机硅灌封胶的补强填料。研究了MQ树脂用量、M/Q值和乙烯基含量等对含阻燃剂和导热填料的加成型RTV有机硅灌封胶性能的影响。结果表明:三种树脂均能有效改善灌封胶的力学性能,同时对胶料黏度影响不大;当MQ树脂中M/Q值为0.6、w(乙烯基)=6.8%和w(MQ树脂)=7%时,灌封胶的增强效果相对最好;当MmDdQq树脂中n(d)∶n(m+d+q)=10∶100或MmTtQq树脂中n(t)∶n(m+t+q)≈20∶100时,灌封胶具有相对较好的增强效果。     

Modulation of Adhesion at Acrylic Adhesive-Silicone Elastomer Interfaces

We have recently reported a systematic investigation of the role of MQ resins (small silica-like nanoparticles) in the modulation of adhesion at silicone elastomer lens—nanometric thin acrylic surface anchored layer deposited on a silicon wafer through loading and unloading JKR experiments. This particular system was chosen as it allowed one to vary the MQ resin content in the elastomer, and to test its resulting effect on both the thermodynamic work of adhesion and the adhesive strength at elastomer—acrylic layer interfaces, avoiding any complication due to bulk mechanical properties of a relatively thick (in the micron range) acrylic layer. We present here a complementary investigation, aimed at understanding the role of the resins in the development of specific interactions at the interface. To do so the adhesive energy between silicone elastomers containing various amounts of MQ resins and model substrates made of self-assemble monolayers of thiol molecules with various amounts of carboxylic terminations have been measured through JKR tests. We show that the level adhesion at these interfaces results from a competition between increased interactions and decreased mobility associated with the incorporation of the resins inside the elastomer.     

Modulation of Adhesion at Acrylic Adhesive-Silicone Elastomer Interfaces

We have recently reported a systematic investigation of the role of MQ resins (small silica-like nanoparticles) in the modulation of adhesion at silicone elastomer lens—nanometric thin acrylic surface anchored layer deposited on a silicon wafer through loading and unloading JKR experiments. This particular system was chosen as it allowed one to vary the MQ resin content in the elastomer, and to test its resulting effect on both the thermodynamic work of adhesion and the adhesive strength at elastomer—acrylic layer interfaces, avoiding any complication due to bulk mechanical properties of a relatively thick (in the micron range) acrylic layer. We present here a complementary investigation, aimed at understanding the role of the resins in the development of specific interactions at the interface. To do so the adhesive energy between silicone elastomers containing various amounts of MQ resins and model substrates made of self-assemble monolayers of thiol molecules with various amounts of carboxylic terminations have been measured through JKR tests. We show that the level adhesion at these interfaces results from a competition between increased interactions and decreased mobility associated with the incorporation of the resins inside the elastomer.     

新型硅改性丙烯酸酯压敏胶的研究

MQ硅树脂可用作改性聚丙烯酸酯类压敏胶,在保持较好力学性能(初粘性、持粘性和剥离强度)和绝缘性的同时,可较大地提高硅改性压敏胶的耐高温性能。MQ树脂的结构和压敏胶的性能用29Si-NMR,DSC,粘性等表征。MQ硅树脂含量对硅改性压敏胶性能影响极大,通常MQ硅树脂用量为(0.3～0.5)%时具有较好的综合性能。该压敏胶粘剂可以直接涂布于经电晕处理的聚酯膜制备压敏胶粘带,便于工业化生产。     

甲基乙烯基MQ硅树脂的制备工艺研究

以1,3-二乙烯基-1,1,3,3-四甲基二硅氧烷和正硅酸乙酯为主要原料,以浓盐酸为催化剂制备了甲基乙烯基MQ硅树脂,并对其工艺条件进行了研究,结果表明,其适宜的制备工艺条件为：催化剂（35-38％盐酸浓盐酸）、去离子水、乙醇的用量分别为1.1％、11％、22％（体积百分数）,水解反应时间1h,反应温度在75℃-80℃之间。