含氟聚（甲基）丙烯酸酯乳液的研究进展

含氟聚(甲基)丙烯酸酯乳液具有合成简便和性能易调等优点,所得涂膜表面能低、耐污性能好、化学稳定性优异,因而在水性氟碳涂料领域受到广泛关注。含氟聚(甲基)丙烯酸酯单体的化学组成对乳液和涂膜性能影响很大。该文分类总结了含氟核心单体包括含氟烷基(甲基)丙烯酸酯、含氟杂原子(甲基)丙烯酸酯、含氟芳香(甲基)丙烯酸酯、含氟(甲基)丙烯酰胺和含氟磺酰胺(甲基)丙烯酸酯等的结构与乳液和涂膜性能的关系,然后对含氟聚(甲基)丙烯酸酯单体和乳液的合成方法进行归纳,最后简要介绍含氟聚(甲基)丙烯酸酯乳液的应用,并对乳液研究存在的问题和未来的发展方向进行展望。     

核壳结构丙烯酸转移胶的合成及性能研究

以丙烯酸酯为聚合单体,采用多次预乳、分步滴加的种子乳液聚合的方法,合成具有三层结构的丙烯酸酯转移胶。研究了核壳层数、各层单体比例及璃化转变温度、乳化剂、引发剂对乳液性能的影响。结果表明:具有三层核壳结构,内到外单体Tg点分别为15℃-45℃-30℃、单体比例为60∶30∶10,用0.3%的复合乳化剂及0.3%过氧化钾为引发剂时,转移胶具有最佳性能。并采用了TEM透射电镜分析,表明采用分步滴加法合成的乳胶颗粒为三层核壳结构。     

含氟丙烯酸酯类单体的技术研究分析

阐述了含氟丙烯酸酯类单体的性能、种类及市场应用情况,详细介绍了含氟丙烯酸酯单体的合成方法,并对我国含氟丙烯酸酯单体的开发提出了建议。     

丙烯酸酯类吸油树脂的研究

以丙烯酸酯为单体,二乙烯基苯为交联剂,三氯甲烷为致孔剂,采用悬浮聚合法合成了轻度交联的多孔丙烯酸酯类吸油树脂。讨论了交联剂用量、致孔剂用量对树脂吸油性能的影响,测定了树脂的吸油性能并通过SEM照片研究了树脂微观结构。采用该方法合成的丙烯酸酯类吸油树脂具有较高的吸油率。     

氟代丙烯酸酯聚合物乳液的合成、表征与应用研究进展

介绍了氟代丙烯酸酯单体的结构特征和制备路线,综述了近年来氟代丙烯酸酯共聚物乳液的合成方法、结构与性能表征以及在应用方面的研究进展。     

新型彩色丙烯酸酯乳液的合成

采用乳液聚合方法合成丙烯酸酯乳液后,通过用含有—NH2的单体与染料分子中的—C l进行亲核取代反应,通过化学反应直接将染料分子接到聚合物链中,得到彩色丙烯酸酯乳液。丙烯酰胺单体加入增加了涂膜的耐水性和机械性能。研究了功能单体的选择、丙烯酰胺加入方式、加量,染料加入方式及加量等对合成彩色乳液的影响,找出了合成彩色丙烯酸酯乳液的最佳参数。该彩色丙烯酸酯乳液具有粘结性强、成膜性好、机械性能好、耐高温性、耐紫外光和雨水冲刷等优异性能,具有很好的着色性能和不褪色的性能,可克服传统工艺染料分散困难、色泽不自然、易褪色等缺陷。     

含氟硅丙烯酸酯类石材养护剂的合成与性能

以有机氟硅、丙烯酸酯为主要单体,采用乳液聚合方法合成了有机氟硅改性丙烯酸酯的聚合物,利用红外光谱对其进行结构表征,并对石材养护剂进行性能测试。研究了有机硅种类与有机硅的含量、丙烯酸含量及软硬单体配比等对乳液性能的影响。实验结果表明:当有机硅单体为KH570,质量分数为5%,丙烯酸质量分数为1%,软硬单体质量比例为56∶44时,聚合物乳液对石材具有较好的防护性能。     

水溶性含氟丙烯酸酯乳液的合成研究进展

含氟丙烯酸酯类聚合物因具有突出的成膜性能及耐老化性能而成为优良的成膜材料。其中,水溶性含氟丙烯酸酯乳液的合成研究,具有广泛的单体种类,聚合方式简单多样,在涂料领域受到了广泛的应用和关注。选择合适的乳液共聚单体及聚合工艺,不仅能够根据实际需要调节含氟聚合物的分子结构,而且可以获得最佳含氟量,以满足特殊性能需要的含氟丙烯酸酯乳液。综述了水溶性含氟丙烯酸酯乳液的聚合方法、常用含氟单体和非氟单体以及改性研究进展。     

丙烯酸酯弹性乳液的制备及应用研究

采用多步半连续滴加种子乳液聚合方法，合成了具有双层和三层核壳结构的丙烯酸酯弹性乳液。采用FT—IR确认了聚合物的结构，研究了乳胶粒子层数、各层单体的种类及用量对胶膜性能及应用性能的影响。     

核壳结构丙烯酸酯乳液合成及其木器封闭底漆的制备

采用种子乳液聚合法合成了核壳结构丙烯酸酯乳液。研究了乳化剂、单体质量在核壳两阶段聚合中的分配、长链丙烯酸酯单体及交联单体对乳液涂膜性能的影响。试验发现:乳化剂在核壳两相分配比例为4∶3最佳,单体质量分配比例为4∶6最佳;长链丙烯酸酯单体与交联单体能提高涂膜耐水性和耐溶剂性,但有一定的适用范围;用该丙烯酸酯乳液及合适助剂配制的水性木器封闭底漆,对底材封闭性良好。     

塑/塑复合用水性复膜胶的研制

在丙烯酸酯单体中加入一种特殊功能单体(HT),通过种子乳液聚合法制备了一种塑/塑复合用水性丙烯酸酯复膜胶(FM-45)。研究了丙烯酸酯复合功能单体配比对FM-45的剥离强度、乳化体系以及应用性能等影响。结果表明:当复合功能单体中m(丙烯酸)∶m(丙烯酸羟丙酯)∶m(HT)=2∶3∶1、w(复合乳化剂)=0.6%(相对于单体总量而言)时,FM-45的综合性能最佳。     

固体颗粒状丙烯酸树脂的合成及其应用

本研究以丙烯酸酯、苯乙烯等单体为原料，采用悬浮聚合法制得颗粒状固体丙烯酸树脂。该树脂贮存和运输的成本低、安全性好；可以和其他原材料复配，得到综合性能较好的黏合剂和涂料。     

醋-丙乳液型压敏胶的研发和生产

概述了将增粘树脂和纳米无机粒子引入丙烯酸酯乳液,采用特殊乳化剂和特殊单体合成丙烯酸酯乳液以及在核-壳乳液共聚等方面开展的研究,并就其研制开发成果和工业化生产作了介绍。     

A novel amphipathic polymeric thioxanthone photoinitiator

A novel amphipathic polymeric photointiator based on thioxanthone (TX) (APTX) containing coinitiator amine was synthesized by introducing TX, amine and short poly(ethylene oxide) (PEO) chain into the backbone of polymeric chain together. APTX can be not only dispersed easily in many solvents and acrylate monomers but also is soluble in water. In comparison to low-molecular weight analogues photoinitiators, APTX is very efficient for photoinitiation of acrylate monomers 2,2-bis[4-(acryloxypolyethoxy)phenyl] propane (ABPE-10) and trimethylolpropane triacrylate (TMPTA), and acrylamide (AM) in aqueous solution.     

水性丙烯酸树脂及防白电油水墨的研究

对防白电油水墨用丙烯酸树脂的制备进行了研究,以满足特种纸张防白电油的需要.实验以甲基丙烯酸、丙烯酸乙酯、甲基丙烯酸甲酯、丙烯酸羟乙酯和丙烯酰胺为聚合单体,过硫酸铵为引发剂,在水和乙醇中进行聚合,然后中和成透明的水溶性丙烯酸树脂液.此外,实验还研究了乙醇用量以及交联单体用量对防白电油性能的影响.结果表明,混合溶剂去离子水...     

Phase separation structure and interfacial properties of lattice‐patterned liquid crystal–polymer composites prepared from multicomponent prepolymers

Lattice‐patterned liquid crystal (LC)–polymer composites are representative candidates for the practical application of LC materials in high‐quality flexible displays. In this work, multicomponent prepolymers are used for the fabrication of lattice‐patterned LC–polymer composites via photoinduced phase separation. Phase separation behavior between LC and polymer is closely related to the solubility parameter of acrylate monomers in the prepolymers. The lattice structure of polymer walls formed by photoinduced phase separation between LC and polymers is stoichiometrically controlled by the composition of acrylate monomers with various solubility parameters. However, unlike the polymer wall structure, it is impossible to control the LC–polymer wall interfacial properties just by altering the composition of the acrylate monomers. The interfacial properties are found to be predominantly affected by a specific component, a fluorinated acrylate monomer, in the prepolymers, and thus the anchoring energy of polymer walls is controlled by incorporation of the fluorinated acrylate monomer. By selecting an appropriate combination of acrylate monomers in the prepolymers, both the phase separation structure and driving properties of lattice‐patterned LC–polymer composites can be controlled simultaneously. © 2013 Society of Chemical Industry     

Incorporation of Very Insoluble Monomers in Waterborne Coatings

The benefits of polymerizing very insoluble monomers in aqueous media, avoiding the use of energy‐intensive procedures, by implementing two novel synthesis techniques based on the emulsifier combination in emulsion polymerization and on miniemulsification by phase inversion temperature are investigated. The performance of standalone polymers consisting of monomers, namely lauryl methacrylate, isobornyl acrylate, and 1H,1H,2H,2H‐perfluorodecyl acrylate, and of formulated binders with these monomers incorporated either through blending or in situ polymerization, is evaluated with special emphasis on their water‐barrier properties (e.g., uptake, whitening, immersion, and vapor resistance) and on their chemical resistance. The performance of the standalone polymers is found to be similar to that of polymers prepared by high‐shear miniemulsion polymerization, while the performance of the formulated binders is generally superior to a commercial coating formulation based on a binder recommended for water resistance.     

常规乳液聚合下提高(甲基)丙烯酸高碳醇酯转化率的途径

以丙烯酸十八酯、甲基丙烯酸甲酯为共聚单体,反应型乳化剂MIXSTAR 6550和非反应型非离子乳化剂NOVELUTION 390复配作为复合乳化剂,过硫酸铵为引发剂,研究了乳化剂用量、3种质子[H ⁺]及[H ⁺]浓度对聚合稳定性、丙烯酸十八酯共聚活性及总单体转化率的影响。结果表明:反应型乳化剂MIXSTAR 6550具有将强憎水的丙烯酸高碳醇酯摆渡到乳胶粒或增溶胶束中的能力,同时强的质子[H ⁺]降低了丙烯酸高碳醇酯的活化能,使丙烯酸高碳醇酯在常规乳液聚合条件下可与其他丙烯酸酯共聚。即使丙烯酸高碳醇酯引入量为45%,总单体转化率也可达97%以上,实现了(甲基)丙烯酸高碳醇酯在常规乳液聚合下可与其他单体进行理想共聚的目的。     

Statistical studies of branched ester latex and paint properties

Vinyl versatate, butyl acrylate and 2-ethylhexyl acrylate were compared as comonomer, for colloid-stabilized vinyl acetate latex polymers to assess their impact on latex coating properties. Vinyl versatate afforded advantages in scrub resistance, gloss, hydrophobicity and higher glass transition temperatures. Butyl acrylate developed better wet adhesion efficiency, gel content and hiding efficiency. 2-Ethylhexyl acrylate offered performance comparable to butyl acrylate in hiding efficiency, lowering copolymer glass transition temperatures, and gloss development. Combinations of these monomers, in many instances, afforded a better balance of performance properties than individual monomers alone. In the subject study, a simplex-centroid design was utilized to statistically map polymer compositions for determining the effect of comonomer composition on latex and paint film properties. In addition to developing contour maps of polymer and paint properties as a function of composition, a technique for studying structure-property relationships is presented.