甲基氰

The alkali lignin-based rigid polyurethane foam was prepared with alkali lignin extracted from black liquor as raw materials to replace 10%~25% amount of polyether polyols and polymethylene polyphenyl isocyanate.

以造纸黑液中提取的碱木质素为原料，代替10~25的聚醚多元醇与多亚甲基多苯基多异氰酸酯合成了碱木质素基硬质聚氨酯泡沫。

The Research on Synthesis of 5-amino-3-cyan-N-(2, 6-dichloro-4-trifluoromethylphenyl) Pyrazole and Its Intermediates

中文名称： 5-氨基-3-氰基-N-（2，6-二氯-4-三氟甲基苯基）吡唑及其中间体的合成研究

There was not few report about 5-amino-3-cyan-N-(2,6-dichloro-4-trifluoromethylphenyl)pyrazole in the domestic , so that the whole synthetic course of 5-amino-3-cyan-N-(2,6-dichloro-4-trifluoromethylphenyl)pyrazole was studied and the intermediate with feasible eco...

因此，研究5-氨基-3-氰基-N-(2，6-氯-4-三氟甲基苯基)吡唑的合成，探索其中间体经济可行的合成路线，具有很好的社会效益和经济前景。

In order to find new pyrazole leading compounds, 14 1--4-(pyrazol- 5-ylcarbony)semicarbazide devivatives were synthesized from 4-chloro-3-ethyl-1-methyl-5-pyrazole car-bonydrazide and substituted phenylisocyanate.

为了寻求新的吡唑先导化合物，用4-氯-1-甲基-3-乙基-5-吡唑甲酰肼与取代苯基异氰酸酯反应得到了14个新的1-吡唑酰基-4-芳基氨基脲类化合物。

In this paper,the toluene -2,4-diisocyanate and trimethylol-propane are usedto synthetize curing agent for polyurethan.

本文用2，4－甲苯二异氰酸酯和三羟甲基丙烷为原料合成聚氨酯固化剂，用该固化剂固化含羟基的树脂。

In the aqueous solution, Cu precipitates with ammonium thiocyanate and tetradecyl benzyl dimethylammonium chloride .

研究发现，在水溶液中Cu与硫氰酸铵、氯化十四烷基二甲基苄基铵形成不溶于水的三元缔合物，在少量氯化钠存在下此三元缔合物沉淀浮于水相上层并与水分成界面清晰的两相，分相过程中Cu被定量浮选。

Flame—retardant resin was prepared by the condensation and polymerization of phosphoric acid, trihydroxy methyl propane and epoxy chloropropane,the resin was then reacted with hexane diacid and diglycol under certain condition ,resulting in polyol containing 1.5% P and 17— 18% polyester polyol, which was foamed with polyisocyanate, water and catalyst by one— step method, producing fire...

通过磷酸、三羟甲基丙烷和环氧氯丙烷的缩合和聚合反应制得阻燃树脂，然后将它与己二酸、一缩二乙二醇在一定条件下反应制得含P1.5%和含Cl17～18%的聚酯多元醇，再将它与多异氰酸酯、水、催化剂等组分采用一步法发泡工艺制得阻燃聚氨酯软泡塑料。

Flame— retardant resin was prepared by the condensation and polymerization of phosphoric acid, trihydroxy methyl propane and epoxy chloropropane,the resin was then reacted with hexane diacid and diglycol under certain condition ,resulting in polyol containing 1.5% P and 17— 18% polyester polyol, which was foamed with polyisocyanate, water and catalyst by one— step method, producing fire—resistant PU soft foam.

通过磷酸、三羟甲基丙烷和环氧氯丙烷的缩合和聚合反应制得阻燃树脂，然后将它与己二酸、一缩二乙二醇在一定条件下反应制得含P1.5%和含Cl17～18%的聚酯多元醇，再将它与多异氰酸酯、水、催化剂等组分采用一步法发泡工艺制得阻燃聚氨酯软泡塑料。

There are several other little-used counterirritants, such as allyl isothiocyanate, histamine, methyl nicotinate, stronger ammonia water, and turpentine oil.

还有其他一些很少使用的抗刺激剂，如烯丙基异硫氰酸酯，组胺，甲基烟酸，更强的氨水和松节油。

The fluorescent emission mechanism, and the some factors that affect the energy and the intensities of the fluorescent peaks were studied. The strong powder second harmonic generation efficiencies for complexes (1),(2),(3) and (4) were found. The determination of variable-temperature magnetic susceptibility for complex (3) and complex (5) was performed. The magnetic data were analyzed with their structure properties, and the further information about the magnetic coupling capacity of Carbamyldicyanomethanide as bridging ligand was obtained.

测试了配合物(1)，(2)，(3)，(4)的荧光光谱，从配体的结构特点等方面研究了该荧光光谱的产生机理，研究了影响荧光谱峰能量及强度的因素；发现了配合物(1)，(2)，(3)，(4)显示有强的二阶非线性倍频效应；测试了配合物(3)和(5)的变温磁化率，对所得磁数据进行了结构性质分析，进一步获得了甲氨酰二氰基甲基阴离子作为桥联配体的磁耦合信息。

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。