查询词典 basic anhydride

The negatively charged sulfonic acid groups was readily introduced through the reaction of the terminal anhydride groups of the anhydride-terminated hyperbranched poly precursor with the amino groups of sulfanilic acid before chemical imidization.

研究表明，在聚合过程的聚酰胺酸阶段，采用过量的邻苯二甲酸酐或苯胺对超支化聚酰亚胺的端氨基或端酸酐基团进行的封端改性切实可行，改性反应可进行地相当彻底。

Hydrogenated terpinene maleic anhydride was prepared by catalytic hydrogenation of terpinene maleic anhydride in the presence of Pd/C catalyst.

研究了反应温度，压力，催化剂用量等因素对萜烯马来酸酐催化加氢制备氢化萜烯马来酸酐合成工艺的影响。

The experiment results indicated that the cross-linking mechanism of hydrogenated terpinene maleic anhydride with bisphenol A epoxy resin was similar to anhydride curing with epoxy resin in the presence of accelerants. The curing degree was increasing as the curing temperature was arisen and the curing time was delayed, and the gelation time was shortened obviously as the curing temperature was arisen and the dosage of accelerants was increased.

实验结果表明：HTMA与环氧树脂的固化反应过程与促进剂作用下的酸酐固化环氧树脂的交联反应机理一致；固化度随温度升高、时间延长而提高，而凝胶时间随温度升高、促进剂用量的增加明显缩短。

The formulations for the synthesis of alkyds resin were designed based on the molecular ratio of the phthalic anhydride and trimellitic anhydride.

以脂肪油、邻苯二甲酸酐、偏苯三酸酐和三羟甲基丙烷为主要原料合成了水分散性醇酸树脂。

A range of waterborne alkyd resins has been prepared by fatty acid process, based on soybean fatty acid, trimellitic anhydride, and various polyols and polybasic carboxylic acids, which are modified with benzoic acid, maleic anhydride and oleic acid.

通过脂肪酸法，选用豆油脂肪酸、偏苯三甲酸酐和不同的多元醇、多元酸制备了一系列水性醇酸树脂，用苯甲酸、顺丁烯二酸酐和油酸对其改性进行了研究。

Water-soluble air drying alkyd resin is formulated by flax oil acid,trimethylol propane,dimethyl isophthalate,benzoic acid,maleic anhydride and trimellitic anhydride.

以亚麻油酸、三羟甲基丙烷、间苯二甲酸、苯甲酸、顺丁烯二酸酐、偏苯三酸酐为原料合成水溶性醇酸树脂，中和后制得的涂料具有干性好、硬度高、耐水性和贮存稳定性优良等特性。

The optimum reaction condition for preparation of CoPcY is as follows: a , using CoCl2 as the exchanged salt ; b , complexation temperature of 180 ; c . complexation catalyst of NH4C1 and A1C13 .2, The unsymmetrically substituted cobalt phthalocyanine complexes were synthesized by statistical condensation of phthalic anhydride and tetrabromophthalic anhydride, and further immobilized in MCM-41 molecular sieves by zeolite synthesis method, as well as characterized by XRD,FT-IR,DRS, 1HNMRetc. The catalytic property of CoPcBrx/MCM-41was tested by cyclohexane oxidation using H2O2 or t-BOOH as oxidant.

2采用本路线制备CoPcY的最佳条件为：a、采用氯化钴作为待交换的金属盐；b、络合温度以180℃为宜；c、起始反应物为苯酐、尿素、氯化铵、氯化铝、CoY时，制备出的CoPcY的催化性能最好； 2、首次采用苯酐和四溴苯酐均相浓缩统计合成法制得了不对称取代的金属钴酞菁络合物，并采用~1HNMR、FTIR、DRS等对其进行了结构表征；此外，采用沸石合成法将其固定于MCM-41中孔分子筛，并对其催化性能进行了考察。

Oil and polyol firstly hydrolyze, and then react with maleic anhydride to give semi ester, the residual maleic anhydride hydrolyzing to give maleic acid, finally are adducted with DCPD. The result of experiment shows that the synthesized resin is of perfect air drying performance and improved flexibility and anti-greening because of the use of oil, meetin...

试验结果表明，油与多元醇在210～220℃下先醇解，然后与顺酐反应形成半酯，剩余顺酐水解成顺丁烯二酸，然后与DCPD加成，合成的树脂具有优良的空干性；同时油的使用极大地提高了涂膜的柔韧性和抗绿化性，得到的树脂性能上可满足涂料用不饱和聚酯树脂的要求。

Citric acid anhydride was synthesized by citric acid and acetic anhydride with acetic acid as solvent.

柠檬酸酐是由柠檬酸两个羧基间脱水形成的，具有吸水性和酰化能力，是合成农药、医药、食品、饮料、清洁剂、化妆品和树脂的一种重要的中间体[1-2]。

This paper take the typical craft of phthalic anhydride which productivity is 20000 ton/year as an example, and analyses the feasibility of using saturated steam turbine to generate electricity or to drive directly large-scale air blower, in order to recycle the afterheat generated in the process of phthalic anhydride production.

以生产能力为20kt/a的典型苯酐工艺为例，分析了用饱和蒸汽汽轮机回收苯酐生产中产生的余热用于发电或者直接驱动大型风机的可行性。

Who? I never heard of him, Paul said, before asking teammate James Posey if he had heard of him.

赛后，科比说，他一直都是一名非常出色的射手，今天他打得很棒。

When I joined the company, I rotated around the different sections.

我加入这个公司时，轮换过几个不同的部门。