异氰酸

Further aza-Wittig reactions of iminophosphorane 3 with aromatic isocyanates gave the carbodiimide s 4, which were reacted with secondary amines to give 2-dialkylamino-thieno[2,3-d]pyrimidin-4(3H)-ones 6 in the presence of catalytic amounts of EtO-Na+ in 58%～82%.

应用膦亚胺3与芳基异氰酸酯的氮杂Wittig反应，生成的碳二亚胺4，再与仲胺作用得到中间体5，而后在醇钠的催化下关环制得2-二烷氨基噻吩并[2，3-d]嘧啶-4(3H)-酮衍生物6，产率为58%～82

This paper deals with making stop bleeding sponge with dried small shrimps. Firstly breaking away with inorganic salt and proteir in the dried small shrimps with acid and NaOH, secondly, taking off vinyl-in the chitin with 50% NaOH, temperature is 110 ℃. the last, reacting with chitosamine and PVA-124 make stop bleeding sponge were produced, catalyst is PdCl 2. The sponge film and sparkce is setatisfaction.

用虾壳经除盐，去蛋白处理后，用50％的NaOH溶液在110℃的温度下脱乙酰基制备壳聚糖；以1∶9的稀醋酸溶作溶剂，氯化钯作催化剂，甲苯二异氰酸酯作发泡剂、交联剂，使壳聚糖与PVA－124进行交联成膜，发泡用氨水洗成中性后在80℃的红外灯烘箱下烘干，制得止血海棉

The result makes clear, ester of different cyanic acid base silicon alkyl got succeeding assembly in base surface, its hydrophoby relatively before assembling, rise somewhat, to the contact of water horn can achieve 80 °, changed the character of chip surface apparently.

结果表明，异氰酸酯基硅烷在基底表面得到了成功组装，其疏水性较组装前有所提高，对水的接触角可以达到80°，明显改变了芯片表面的性质。

Accordingly, ester of different cyanic acid assembles film to be in oneself technology of small full analysis (μ- the small passageway in TAS) is decorated, the fossilization of the biology macromolecule such as protein, polypeptide, and the respect such as material surface modified all has very good application perspective.

因此，异氰酸酯自组装膜在微全分析技术中的微通道修饰，蛋白质、多肽等生物大分子的固定化，以及材料表面改性等方面均具有很好的应用前景。

A DFT study of cyanic acid and isocyanic acid in the isomerization;2. The reaction path of isocyanic acid with carbon-hydrogen radicals CH, CH 2 and CH 3 have been investigated by using UMP2 method at 6-311g level.

在UMP2 / 6 311计算水平上，计算并讨论了碳氢自由基和异氰酸发生氢转移反应位能面上驻点的结构和分子结构变化，并依据UMP2的优化构型，进一步采用UQCISD方法对反应途径上的驻点进行了单点能量计算。

TDI, toluene two different cyanic acid esters are manufactured PU paint raw materials, PU paints both beautify and furniture, flooring and wooden ornaments, and cheaper prices, favored by consumers, but inferior to the large number of floating PU paints containing the TDI can cause great harm.

TDI即甲苯二异氰酸酯，是制造聚氨酯油漆的原料，而聚氨酯油漆既美化家具、地板和木饰品，价格又比较便宜，深受消费者青睐，但劣质的聚氨酯油漆含有大量游离的TDI，能对人体造成极大的伤害。

Three series of segmented polyurethanes were synthesized, which are based on 4,4'-methylene-di, N-methyl diethanolamine and hydroxy terminated poly-butadiene, poly or poly.

本文讨论了以聚环氧乙烷、聚环氧丙烷以及聚丁二烯为软段，以4，4'-二异氰酸二苯甲烷和N，N-二羟乙基甲胺为硬段的链段型聚氨酯的合成。

Inspected gathered in advance the body preparation method influence, the neutralizaing agent triethylamine to the disperser craft and the stability of emulsion influence, the water affinity chain extendor DMPA amount used to the river character polyurethane emulsion performance influence, the isocyanogen diethylene glycol dinitrate amount used to the river character polyurethane emulsion performance influence and the soft section low-molecular polymer dihydroxy alcohol amount used to the river character polyurethane emulsion performance influence.

考察了预聚体制备方法的影响，中和剂三乙胺对分散工艺及乳液稳定性的影响，亲水扩链剂DMPA的用量对水性聚氨酯乳液性能的影响，异氰酸酯的用量对水性聚氨酯乳液性能的影响及软段低聚物二元醇的用量对水性聚氨酯乳液性能的影响。

Diphenylmethane diisocyanate production process produces a lot of brine containing aniline and polyamine.

二苯基甲烷二异氰酸酯生产过程中会产生大量含苯胺和多胺的盐水，对其有效的处理是MDI生产技术中的一大难点。

The castor oil based polyurethane potting materials were synthesized from castor oil,4,4 diphenylmethane diisocyanate,trimethylolpropane and 1,2 propanediol.

以蓖麻油，4，4' -二苯基甲烷二异氰酸酯、三羟甲基丙烷与 1，2 -丙二醇为原料合成了蓖麻油基聚氨酯灌封胶，研究了灌封胶的固化流变行为和凝胶化时间。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。