高温烘烤对有机硅改性涂料性能的影响

主要探讨了高温烘烤对有机硅改性丙烯酸树脂涂膜应用性能的影响,通过试验验证,发现不同有机硅改性对丙烯酸树脂涂料的耐老化性能影响有较大不同。分别采用硅氧烷单体、乙烯基硅氧烷、甲基三氯硅烷、聚乙烯基硅氧烷、聚二甲基硅氧烷制备水性有机硅改性丙烯酸树脂,结果表明,有机硅改性丙烯酸树指涂料的抗烘烤性能为：聚乙烯基硅氧烷=聚二甲基硅氧烷>乙烯基硅氧烷>甲基三氯硅烷>硅氧烷单体。     

中国专利

正硅氧烷硝酮及其用途/CN103172868A/赢创工业集团股份有限公司多面体低聚倍半硅氧烷改性的含双键弹性体及其制备方法/CN103172870A/北京化工大学一种硅烷接枝PPR管材专用料及其制备方法/CN103172937A/杭州恒标管业有限公司光半导体封装用热固性有机硅树脂组合物/CN103173017A/横滨橡胶株式会社     

有机硅改性丙烯酸聚氨酯涂料的制备

以过氧化二苯甲酰为引发剂,将不同用量的γ-甲基丙烯酰氧基丙基三甲氧基硅烷与苯乙烯、丙烯酸酯类单体进行共聚,合成有机硅改性含羟基丙烯酸树脂。红外光谱证实有机硅成功地引入到丙烯酸树脂中。用该有机硅改性树脂与N3390固化剂反应,制成有机硅改性聚氨酯涂料,考察了有机硅含量对漆膜性能的影响。     

溶剂型有机硅改性丙烯酸酯涂料的生产方法

本发明涉及一种用于高层、多层建筑墙面、桥面，公路护栏，道路隔栏等的溶剂型有机硅改性丙烯酸酯涂料的生产方法。该方法是将正硅酸酯在酸性介质中水解缩聚成有机硅齐聚物，将由该有机硅齐聚物与丙烯酸酯单体和含不饱和双键的有机硅单体共聚成的有机硅改性丙烯酸树脂与颜填料等配制而成涂料。该方法制得的丙烯酸树脂涂料，附着力高，有很好的耐水性，耐沾污性，耐洗刷性，耐热性和耐老化性。     

丙烯酸环氧酯-苯乙烯/过氧化苯甲酰-二甲基苯胺体系固化过程的研究

丙烯酸环氧酯是七十年代末开发的一种改性环氧树脂,是由丙烯酸类(通常为丙烯酸和甲基丙烯酸)与环氧树脂在催化剂存在下反应合成的。这类树脂是在环氧树脂分子链的两端引入不饱和双键,使它具有不饱和树脂和环氧树脂的双重性能。丙烯酸环氧酯分子链两端的双键是交联点的位置,可以通过改变丙烯酸类和环氧树脂的分子结构以及分子链上的双键数目来改进丙烯酸环氧酯的热稳定性,以及力学、物理等性能。     

有机硅低聚体改性丙烯酸酯树脂的合成

以偶氮二异丁睛(AIBN)为引发剂,选择甲基丙烯酸丁酯、丙烯酸和丙烯酸丁酯等单体共聚,合成丙烯酸酯树脂;选择-苯基三乙氧基硅烷与二甲基二乙氧基硅烷为单体进行水解缩聚,合成有机硅树脂低聚体;通过有机硅树脂低聚体与丙烯酸酯树脂的接枝反应,合成有机硅低聚体改性丙烯酸酯树脂,并对影响改性树脂性能的重要因素进行了探讨,找出了合成改性树脂的最优条件。     

抗酸雨性优良的丙烯酸高固体分汽车涂料

叙述了硅氧烷封闭丙烯酸树脂中羟基和Si—H键和丙烯酸树脂中双键交联反应的原理，对用这两种新技术途径试制的抗酸雨性优良的丙烯酸高固体分汽车面漆性能作了评介。     

有机硅改性水性聚氨酯-聚丙烯酸酯乳液的研究

以聚酯多元醇、异佛尔酮二异氰酸酯、甲基丙烯酸甲酯等为原料，合成了水性聚氨酯丙烯酸乳液，加入含侧氨基和不饱和双键的有机硅氧烷进行扩链改性，得到了一系列有机硅改性的聚氨酯丙烯酸乳液。对得到的产物进行了表征，对改性前后的体系涂膜的性能进行了比较，结果表明，用有机硅改性的聚氨酯丙烯酸乳液形成的涂膜接触角更大、附着力更强、具有更好的耐水性，但硬度稍有下降。     

有机硅氧烷改性丙烯酸乳液合成及性能研究

通过乳液聚合法,用羟基硅油与硅烷偶联剂A-151(乙烯基三乙氧基硅烷)或KH-570(γ-甲基丙烯酰氧基丙基三甲氧基硅烷)对丙烯酸酯进行化学改性,借助硅烷偶联剂中的碳碳双键和硅氧烷结构将羟基硅油与丙烯酸酯连接起来。然后利用红外光谱(FT-IR)对改性丙烯酸酯的微观结构进行表征,研究结果表明:Si—O键成功地共聚到了丙烯酸长链中。并对改性后乳液的各项性能进行对比,结果发现通过KH-570改性后的丙烯酸酯乳液在各项性能上都有明显的提升。     

LDH有机改性对硅丙树脂复合涂层性能的影响

以八甲基环四硅氧烷为原料,使用六甲基二硅氧烷为分子量调节剂,在二甲基亚砜促进作用下,使用本体聚合的方法合成带有双键的预聚有机硅预聚体。再选用核-壳聚合的方式,把丙烯酸酯单体、有机硅预聚体、有机改性纳米LDH进行聚合,合成出不同LDH含量的复合树脂乳液。通过耐水性测试可以得出,硅丙树脂/LDH纳米复合相比于纯丙烯酸树脂在耐水性、耐腐蚀性等方面有明显的提升。有机改性LDH的加入,可以明显加强复合树脂的耐酸碱性,同时改性后的树脂膜在拉伸强度方面也均得到了提高。当有机改性LDH含量为3%时聚合物的性能达到最佳。实验证明,LDH的加入可以有效地提高丙烯酸树脂对于抵抗紫外线、酸雨等恶劣气候的性能。     

Preparation and characteristics of a waterborne preventive stain coating material with organic-inorganic composites

With the goal of developing a waterborne coating material that prevents staining, organic-inorganic composites prepared from colloidal silica and two types of acrylic resin emulsions were investigated as exterior coatings. conventional acrylic resin emulsion and organic silane hybridized acrylic resin emulsion prepared by emulsion polymerization were mixed with colloidal silica to form organic-inorganic comiposite films. The addition of colloidal silica to emulsions yielded films with higher hydrophilicities, as indicated by lower water contact angles for these films in comparison to films without colloidal silica. The water contact angles of organic silane hybridized acrylic resin emulsion/colloidal silica films were lower than those of acrylic resin emulsion/colloidal silica films. Composite films containing colloidal silica particles smaller than 100 nm in diameter showed high hydrophilicities. Observations of the dispersed state of colloidal silicaparticles in organic-inorganic composite films by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) demonstrated that colloidal silica particles were densely aggregated on the film surface. Outdoor exposure tests of the coating materials prepared from organic silane hybridized acrylic resin and colloidal silica particles with diameters of 7.5 nm showed excellent stain resistance.     

Novel ambient temperature curable two-component waterborne silicone-acrylic coatings

Waterborne coatings are composed of resins containing hydrophilic functional groups. These groups usually remain in the coating film and can adversely affect film properties such as weatherability and resistance to water and alkali. We have developed a novel ambient temperature curable waterborne two-component system, in which the hydrophilic functional groups are consumed by the crosslinking reaction. The new coating system consists of a waterborne acrylic resin containing both tert-amino and carboxylic acid groups and a hardener containing both epoxy and alkoxysilyl groups. The waterborne silicone acrylic coatings provide superior film properties even if the acrylic resin has relatively low functional group content. In this paper we describe the crosslinking reaction mechanism and film properties using some acrylic resin types and paint formulations as examples. Presented at the 24th Annual Waterborne, High-Solids, and Powder Coatings Symposium, on February 5–7, 1997, in New Orleans, LA. 1-3 Takasago, Takaishi-shi, Osaka, Japan.     

有机硅改性聚酯的合成及其粉末涂料的性能

利用有机硅中间体合成了有机硅改性聚酯树脂。通过IR、GPC、SEM等分析了改性聚酯的结构与形态 ,用电子探针分析了改性聚酯的表面组成 ,考察了有机硅含量对改性树脂玻璃化温度、熔融黏度、对水的接触角及表面张力的影响。研究发现 ,改性聚酯中的含硅聚酯在表面富集 ,大大降低了聚酯树脂的表面张力 ,提高了其粉末涂料的涂膜耐候性。相对于纯聚酯树脂 ,有机硅质量分数为 1 %可使树脂的表面张力从 49.5降到 2 8.4mN/m ;经 2 1 6h中波紫外线照射后 ,涂膜的光泽保留率从 81 %上升到 91 .3 %。含有机硅质量分数超过 5 %后 ,涂膜的抗冲性能下降。     

耐磨擦硅橡胶涂层制备工艺研究

硅橡胶用于电子产品的按键涂层不仅手感柔软,同时具有优异的防污、耐化学品腐蚀等性能,但其耐磨性能有待改善。文章对影响硅橡胶涂层耐摩擦性能的因素,如VMC（甲基乙烯基环硅氧烷）的用量、偶联剂的影响、交联剂含氢硅油的种类及用量封头剂用量等进行了研究,结果表明,制备耐磨擦硅橡胶涂层的适宜工艺条件为：VMC、封头剂的用量分别为7％和0．067％,加入偶联剂可以提高硅橡胶涂层的耐磨擦性能,交联剂应采用高含氢硅油。     

Improvement in wettability of pressure‐sensitive adhesive on silicon wafer using crosslinking agent with siloxane groups

Acrylic copolymers are prepared by radical polymerization of 2‐ethylhexyl acrylate, ethyl acrylate, and acrylic acid followed by crosslinking to manufacture the pressure‐sensitive adhesives (PSAs) for silicon wafer protection. Both higher reliability and wettability are required for the protective acrylic PSAs in the semiconductor processing applications. The siloxane linkages are introduced in the acrylic PSAs via crosslinking with siloxane‐containing crosslinking agent to modify the thermal and wetting properties of PSAs efficiently. The more efficient formation of crosslinked network structure was achieved with higher content of tetra‐functional crosslinking agent, and the surface energy of PSAs decreased significantly with increasing the content of siloxane linkage resulting in the improved areal wetting rate. The thermal stability of PSAs was also improved significantly by incorporation of siloxane linkages. The adhesion properties such as peel strength and probe tack of acrylic PSAs decreased significantly by increasing the content of either crosslinking agent or siloxane linkage. The acrylic PSA with siloxane group showed both satisfactory wetting and clean debonding properties for the optimal protection of thin silicon wafers. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Crosslinking of pressure sensitive adhesive based on water‐borne acrylate

This publication shows how the kind of crosslinking agents and their contents influence important properties of acrylic based pressure‐sensitive adhesive (PSA) dispersions such as tack, adhesion and cohesion. Synthesized PSAs based on acrylic polymers, containing 2‐ethylhexyl acrylate, butyl acrylate, vinyl acetate, styrene and acrylic acid are used in the preparation of self‐adhesive dispersions used as coating of polyethylene foams and poly(vinyl chloride) and polyester foils. © 2003 Society of Chemical Industry     

硅烷偶联剂改性玻璃微珠用于不饱和聚酯树脂

采用乙烯基、甲基丙烯酰氧基和环氧基3类硅烷偶联剂对中空和多孔两种玻璃微珠进行了改性,将其用于不饱和聚酯树脂复合材料。利用红外光谱(FTIR)、核磁共振谱仪(NMR)和扫描电镜(SEM)技术,结合力学性能测试对其改性机理进行了分析。结果表明,硅烷偶联剂不改变微珠和不饱和聚酯树脂基体的本体结构。硅烷偶联剂非极性端含有C==C双键,使玻璃微珠具有较大的表面张力,且与不饱和树脂相似的双键使其易于结合;此外,非极性端的链长较长,使其与树脂形成的过渡层具有良好的空间柔软性。对于相同非极性端的硅烷偶联剂,极性端含有大基团的偶联剂与玻璃微珠的结合效果较弱。微珠的均匀外形有益于它与树脂的结合。     

紫外光固化涂料配方设计

以Hypomer AC-7435热塑性丙烯酸树脂、氯醋树脂和CAB 381-2醋酸纤维素为成膜物,合成了铝粉底漆:以Hypomer UA-M6丙烯酸酯聚合物、Hypomer UR-61聚氨酯丙烯酸酯、二缩三丙二醇二丙烯酸酯(TPGDA)、三羟甲基丙烷三丙烯酸酯(TMPTA)、异冰片丙烯酸酯(IBOA)为成膜物,1-羟基环己基苯基甲酮为光引发剂,合成了适用于各种基材的紫外光固化清漆.介绍了紫外光固化涂料及其底漆配方,讨论了影响配方设计的各种因素以及光引发剂用量对涂料固化速率的影响.     

Evaluation of bisacrylate terminated epoxy resins as coatings

The paper describes the effect of backbone flexibility on the coating performance of vinyl ester resin. For this purpose four resins of varying flexibility were prepared. Bisacrylate terminated epoxy resin (D) was prepared by reacting 2 mol of acrylic acid with 1 mol of diglycidyl ester of hexahydrophthalic anhydride. The flexibility of the backbone was increased by chain extension of mono acryloxy derivative of diglycidyl ester of hexahydrophthalic anhydride with sebacic acid (resin G′). Partial cross-linking of resin D containing pendant hydroxyl group was also done by reacting with small amounts of isophorone diisocyanate (D₂I₁₀, D₂I₄).     

A new resin system for super high solids coating

This paper concerns a super high solids coating composed of two polymers; a silicone polymer containing SiH groups, and an acrylic or polyether polymer containing C=C groups. The silicone polymer was prepared by the equilibrium reaction of SiH containing polysiloxane and other organosiloxanes in the presence of sulfuric acid. Acrylic polymers were obtained by free radical polymerization of a monomer having an alkenyl group and other vinyl monomers. Homogeneous clear paints were available by adjusting compatibility of polymers, and VOCs of the paints were very low due to the low viscosity of a silicone polymer and the absence of polar functional groups in the coating system. The crosslinking reaction of this coating occurred through the hydrosilylation reaction between SiH and C=C groups. The performances of cured films, such as etch resistance and durability, were excellent.