New High Viscosity Ester Base Stocks for Superior Lubricant Formulations

BASF presents a new high viscosity ester base stock technology.Viscosity profiles of these new candidates are comparable to market-known high viscosity PAO types such as PAO 40 and PAO 100.Due to the more polar nature of the new ester base stocks additional benefits can be achieved in terms of friction reduction,energy efficiency or facilitated additive solubilisation against high viscosity PAOs.The superior performance of the new high viscosity ester base stock technology is demonstrated in direct comparison against high viscosity PAO counterparts in industrial gear applications.The basic advantages found herein in industrial gear applications are also of relevance for other lubricant applications such as automotive driveline oil or engine oil applications.As one exemplary area industrial gear applications play a dominant role in modern wind turbines.The latest generation of lubricants used in these turbine gear boxes are required to provide a greater performance in terms of wear protection,durability,foam resistance,shear stability,and oxidation resistance.Common formulations are based on a PAO base stock thickened with high molecular weight PAO polymers to achieve a viscosity of ISO 320 combined with additives to provide wear protection,foam resistance etc.A recent plant outage coupled with high demand for high molecular weight PAO polymers has led to the market becoming aware of potential availability issues.In response to this important challenge BASF has developed a new formulation strategy-based on the new high viscosity ester technology and upon a widely available low molecular weight PAO base stock employing a new concept in a thickening system that avoids the use of high molecular weight PAO polymers.The novel ester base stock can be manufactured at multiple locations and is based on sustainable raw materials that can be sourced from a wide supplier base.     

硼氢化钠还原酯实验的探讨

本文介绍了硼氢化钠对酯的还原作用，指出了现行教科书中对硼氢化钠还原酯作用的欠妥说法。对硼氢化钠的还原作用的认识更加全面     

耐碱环氧乙烯基酯树脂的分子设计

分析了影响已固化的环氧乙烯基酯树脂耐碱性的因素。试验结果证实:树脂分子中酯基密度及其相邻基团的空间保护作用是影响耐碱性的主要因素,分子网络结构的交联密度和亲水性也对树脂耐碱性起重要作用。     

Development of soy-based UV-curable acrylate oligomers and study of their film properties

Bio-based coating materials have emerged as an environmentally friendly alternative to petrochemical based ones due to their sustainability, lower carbon footprint and often lower cost. Acrylated vegetable oils and their derivatives are increasingly preferred for advanced photo-curable “green” coatings due to a number of technical and commercial benefits. We report a novel family of acrylate-functional monomers/oligomers derived from epoxidized soybean oil (ESO) and epoxidized soy-methyl ester (EME), using 2-hydroxyethyl acrylate (HEA) as an acrylating agent. Using super-acid catalyzed etherification, acrylated soy-monomers and oligomers with lower viscosity and high acrylate content have been synthesized. Soy-acrylate products are characterized for their chemical structures and functionality using chemical, physical and spectroscopic methods.     

新型苯乙烯挥发抑制剂及低苯乙烯挥发树脂

通过对华昌公司苯乙烯挥发抑制剂Merican 109加入树脂前后的固化性能及树脂对玻璃钢表面的粘接性能测试和对粘接测试后剥离表面的扫描电镜分析研究了Merican 109在树脂常温固化过程中对苯乙烯挥发的抑制作用。同时将华昌公司新型低苯乙烯挥发树脂MEF-2LSE、Merican 9709LSE、Merican 9406LSE等在常温固化过程中苯乙烯的挥发性与通用树脂进行了比较。结果表明,Merican 109与德国公司BYK 740作用相当,苯乙烯挥发量降低了50%～90%,且固化性能、粘接强度未受影响。MEF-2LSE树脂的低挥发性表现优异,15℃时挥发量为普通树脂的1/8。     

New Vinyl Ester Bio-copolymers Derived from Dimer Fatty Acids: Preparation, Characterization and Properties

Two different vinyl ester resin monomers derived from dimer fatty acids (DA), dimer fatty acids polymerized glycidyl methacrylate (DA-p-GMA) resin and maleic anhydride modified dimer fatty acids polymerized glycidyl methacrylate (MA-m-DA-p-GMA) resin were prepared via simple ring-opening and esterification. FTIR, ¹H-NMR and GPC results demonstrated that these two target products have been successfully synthesized. Moreover, DA-based vinyl ester resin–styrene copolymers with different weight ratios were also prepared by a thermal polymerization, and their mechanical, morphological and thermal properties were investigated. Mechanical tests displayed that the prepared copolymers had excellent mechanical properties, and even at a low styrene content of 30 wt%, the copolymers still had excellent flexural strength of 29.14 MPa and tensile strength of 15.99 MPa. Micro-morphological investigation displayed that the copolymers had glossy and smooth impact resistance fractured surfaces, indicating distinctive fast brittle fracture features. Dynamic mechanical analysis (DMA) revealed that the copolymers’ glass-transition temperatures were within a broad range from 44 to 72 °C. Thermogravimetric results demonstrated that the copolymers had excellent thermal stability, as all copolymers showed a high thermal initial decomposition temperature above 390 °C.     

δ-癸内酯的合成

采用廉价易得的己二酸二甲酯为原料 ,用金属钠在甲苯中进行Dieckmann酯缩合 ,加入DMF为溶剂在 80～ 85℃直接与溴代正戊烷反应生成 2 戊基 2 甲氧酰基环戊酮 (Ⅰ ) ,经过脱羧反应和Beayer-Villiger氧化反应得到δ 癸内酯 (Ⅲ ) ,产品纯度为w(δ 癸内酯 ) >98% (GC法 ) ,香气纯正。反应总产率达 48%。列出了各中间体的IR数据 ,最终产品由FT -IR、1 HNMR和EI-MS进行了结构确证     

矿石中银的快速测定

拟定了一种矿石中银的快速测定方法。该方法采用硝酸溶解样品,黄原酯棉富集分离,以硫氰酸盐滴定法进行测定,其方法简单、快速,准确度较好,经矿石验证,结果令人满意。     

聚乙二醇硬脂酸酯的合成

以硬脂酸为基本原料,通过酰氯化后所得硬脂酰氯,再与聚乙二醇(400)进行酯化反应合成聚乙二醇(400)硬脂酸酯非离子表面活性剂。探讨了物料配比、反应时间、温度对合成反应的影响。合成反应的最佳条件为:反应温度为100℃,时间为1.0h,硬酯酰氯:聚乙二醇=1.1:1(摩尔比)。     

Cyanide‐Catalyzed Additions of Acyl Phosphonates to Aldehydes: A New Acyl Donor for Benzoin‐Type Reactions

Acyl phosphonates have been utilized as new acyl donors for cyanide‐catalyzed benzoin‐type reactions. Cyanation of acyl phosphonates, followed by a [1,2]‐phosphoryl migration generates the active acyl anion intermediate. The presumed (cyano)phosphate anion reacts with a variety of aryl aldehydes to yield phosphate ester‐protected, unsymmetrical benzoins in good to excellent yields. The unsymmetrical benzoin product can be obtained after deprotection of the phosphate ester with an aqueous amine solution.