甲基氰

Poly/melamine cyanurate composite latex particles are prepared via soapless emulsion polymerization. XPS data and TGA analysis reveal that MC particles are encapsulated by PMMA during polymerization, resulting in the formation of a core-shell structure of PMMA/MC composite latex particles. MC can affect the thermal degradation and promote the charring of PMMA. The application of PMMA/MC in nylon 6 (PA6) indicate that the composite latex particles can improve the mechanical pro...

采用原位乳液聚合法制备了聚甲基丙烯酸甲酯/三聚氰胺氰尿酸盐复合胶粒，对其进行X光电子能谱及热重分析结果显示，在MC阻燃剂颗粒表面覆盖了一层PMMA胶膜，形成了具有核-壳结构的PMMA/MC复合胶粒；MC能影响PMMA的热降解过程并促进其成炭；在尼龙6(PA6)中的应用结果表明，PMMA/MC复合胶粒能改善PA6的力学性能和阻燃性能。

The 6- cyano-1, 1 (1, 3- dioxypropylidene)-7-(carbomethoxyl group- methyl - 5- oxo-Delt6 (8)- tetrahydrochysene indolizine and haloethane reacts with each other for ethylization with existence of alkali and organic solution with or without phase transversion catalyst, and produces mentioned product.

本发明在相转移催化剂或无相转移催化剂存在下，6-氰基-1，1-(1，3-亚丙二氧基)-7-(甲氧羰基-甲基-5-氧代-Δ6(8)-四氢中氮茚类化合物与卤代乙烷在碱和有机溶剂的存在下进行乙基化反应即得6-氰基-1，1-(1，3-亚丙二氧基)-7-1′-(烷氧羰基-丙基-5-氧代-Δ6(8)-四氢中氮茚类化合物。

The basic functionalized ionic liquid, 1 -butyl-3-methylimidazolium hydroxide OH, was prepared and used to catalyze the Knoevenagel condensation of aromatic aldehydes with malononitrile or ethyl cyanoacetate.

合成了碱性功能化离子液体氢氧化1-丁基－3-甲基咪唑，研究了将其作为催化剂催化芳香醛和丙二氰、氰基乙酸乙酯的Knoevenagel缩合反应。

The basic functionalized ionic liquid, 1-butyl-3-methylimidazolium hydroxide, was prepared and used to catalyze the Knoevenagel condensation of aromatic aldehydes with malononitrile or ethyl cyanoacetate.

合成了碱性功能化离子液体氢氧化1-丁基-3-甲基咪唑，研究了将其作为催化剂催化芳香醛和丙二氰、氰基乙酸乙酯的Knoevenagel缩合反应。

Our main products include 5-Methyl-2-pyrazinecarboxylic acid series, Guanine series, Folic acid series, Methyl Cyanoacetate and Ethyl cyanoacetate series, we also have made great contribution in the development of cardiovascular drug, stomach drug, anti-inflammatory drug and antidepressants, such as Nizatidine, Acipimox, Glipizide, Zaltoprofen and Pregabalin, which have been put into production on large scare.

公司主要产品有5-甲基吡嗪-2-羧酸系列，鸟嘌呤系列，叶酸，氰乙酸甲酯，氰乙酸乙酯系列，在心血管药、胃药、消炎药、抗抑郁药等新品开发上有重大建树，先后研制成功，形成批量生产，如尼扎替丁、阿西莫斯、格列吡嗪、扎托洛芬、普瑞巴林，同时具备为客户定制化学品的能力。

A series of polyether based polyurethaneurea aqueous dispersions with well-defined hard segments were prepared by fractional steps with polyether polyol, 4,4'-diphenylmethane diisocyanate, dimethylolpropionic acid, 1,4-butanediol, isophorone diisocyanate and ethylenediamine.

以二苯基甲烷二异氰酸酯、二羟甲基丙酸、1，4-丁二醇、异佛尔酮二异氰酸酯和乙二胺为硬段，聚醚多元醇为软段，通过分子设计采用分步合成法，制备了具有规整硬段和良好分散性能的聚醚型聚氨酯脲水分散液。

A series of polyether based polyurethaneurea aqueous dispersions with well-defined hard segment s were prepared by fractional steps with polyether polyol, 4,4′-diphenylmethane diisocyanate,dimethylolpropionic acid,1,4-butanediol,isophorone diisocyanate and ethylenediamine.

以二苯基甲烷二异氰酸酯、二羟甲基丙酸、1，4-丁二醇、异佛尔酮二异氰酸酯和乙二胺为硬段，聚醚多元醇为软段，通过分子设计采用分步合成法，制备了具有规整硬段和良好分散性能的聚醚型聚氨酯脲水分散液。

Hexamethylene diisocyanate may be used in prepolymer, in place of TDI

六亚甲基二异氰酸酯可用在预聚物中代替甲苯二异氰酸酯〔TDI〕。

Hexamethylene diisocysnate may be used in prepolymer, in place of TD I.

六亚甲基二异氰酸酯可用在预聚物中代替甲苯二异氰酸酯〔toi〕。

Lignin based polyurethane films were prepared by solution casting from hydroxypropyl lignin derivatives and hexamethylene diisocyanate or toluene diisocyanate.

以羟丙基化木素和甲苯二异氰酸酯或六亚甲基二异氰酸酯为原料，采用溶液流延法制备了聚氨酯。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。