异氰酸

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。

In this paper, quantum chemistry methods were used to investigate themicrocosmic reaction mechanisms and dynamics of a series of activatenitrogen-, sulfur- and halogen-containing radicals and some smallmolecules in the gas phase theoretically, including isocyanic acid,isothiocyanic acid and ketenyl radical.

本研究论文是采用量子化学理论和计算方法，对异氰酸 HNCO、异硫氰酸 HNCS 及其自由基、乙烯酮自由基 HCCO 与若干气相含氮、硫、卤素的活性小分子自由基反应的微观反应动力学进行理论计算研究。

In this paper, quantum chemistry methods were used to investigate the microcosmic reaction mechanisms and dynamics of a series of activate nitrogen-, sulfur-and halogen-containing radicals and some small molecules in the gas phase theoretically, including isocyanic acid , isothiocyanic acid and ketenyl radical .

本研究论文是采用量子化学理论和计算方法，对异氰酸HNCO、异硫氰酸HNCS及其自由基、乙烯酮自由基HCCO与若干气相含氮、硫、卤素的活性小分子自由基反应的微观反应动力学进行理论计算研究。

In ternary system of PGA/POH and HDI isocyanurate, there are twomain reactions: one forms urethane at 30-50℃, the other producesoxazolidone at 140-165℃.

聚丙烯酸环氧丙酯（PGA、聚丙烯酸羟丙酯（POH和HDI三聚体的三元反应体系中，醇羟基与异氰酸酯在30-50℃下反应可生成氨酯，环氧基团与异氰酸酯在140-165℃下反应生成噁唑烷酮。

Also discussed is the research direction for development of new phosgenated products ,important among them being IPDI isophorone diiso.

简述了光气化产品开发研究方向，提出重点开发IPDI、NDI (1，5 萘二异氰酸酯)、氯磺酰异氰酸酯和较大分子量的氯代甲酸酯等光气化产品。

The activated hydroxyl of the rare earth complex reacted with the -NCO of the of isophorone diisocyanate,and a new bonding-type rare earth polymer materials was prepared. We studied the optical property, thermodynamic properties of the materials were, and the results obtained show that the materials have high light transmittance and thermal stability as well as good fluorescence properties.

同时利用配合物的活性基团羟基与异佛尔酮－二异氰酸酯中的异氰酸根活性基团进行反应，制备出一种新型的键合型稀土高分子材料，并考察了该材料的光学性能、热力学性能等。

By use of titration analysis, the thesis investigated various factors such as isocyanate, PE molecular weight, reacting substance molecular ratio, reacting temperature and time etc. influencing upon prepolymerization step. It was found that 2, 4-tolulene diisocyanate and 4, 4'diphenylmethane diisocyanate is more rapidly reacted with PE600 than HDI. With PE molecular weight increasing, the reacting temperature or time should be raised or extended relevantly. Thus PE2000+2HDI pre-polymerization should be better carried out under some catalyst, for example, Triethylene diamine , Dibutyltin dilaurate and Tin octoate were used.

首先采用滴定分析方法对WRPU预聚反应的影响因素进行了研究：芳香族二异氰酸酯TDI、MDI比脂肪族二异氰酸酯HDI反应活性高，其中TDI在反应初始阶段的反应速率比MDI快，不过随着反应的进行，MDI比TDI反应速率加快，这主要是因为TDI分子中的两个-NCO反应活性差异大所致；二元醇分子量越大，反应速度越慢；聚醚二元醇比聚酯二元醇的反应速度快；当分子量超过2000的二元醇与HDI进行预聚反应时，需借助适当的催化剂来加快反应速度，从而使预聚反应能够顺利进行，分别选择DABCO、TOA和DBDTL三种催化剂进行催化反应，发现不同的催化剂，其催化效果相差较大。

The strategy involves a staged combustion, where a hydrocarbon fuel added in the second, fuel-rich stage provides hydrocarbon radicals which can react with and finally reduce the NOx formed in the first, fuel-lean stage, such that NOx formed in the first stage reacts with small hydrocarbon radicals present in the second stage combustion, finally leading to N〓, and to HCN which in turn is converted to NO or N〓. Understanding of the chemistry in this second reburning stage is clearly a key to understanding and optimizing reburn technology.

目前消除NOx的主要方法是向燃烧的废气中加入某些化学物质使其重新燃烧(Selective Noncatalytic Reduction of NO processes，SNCR)，RAPRENOx过程是SNCR的主要方式之一，其实施是向燃烧产生的废气中加入异氰酸，异氰酸在高温下经一系列包括NCO的自由基反应，可以从燃烧的废气中迅速除去NOx化合物。

The resin which was synthesized by the materials of hydroxy silicone oil , 1, 6-hexamethylene diisocyanate, tolylene diisocyanate, pentaerythritol triarylate and 2-hydroxy ethyl acrylate is able to cure rapidly at room temperature by UV.

本实验采用溶液聚合的方法，以端羟基硅油、甲苯二异氰酸酯、六亚甲基二异氰酸酯、丙烯酸—2—羟基乙酯和季戊四醇三丙烯酸酯为原料制备出了新型能够进行快速固化、高效的三官能度封端的光固化反应体系。

Amino resin or amino paint is mixed with a certain amount of polyisocyanate and xylene solvent etc is added.

氨基树脂或氨基漆与一定比例的多异氰酸酯固化剂混合，加入二甲苯等稀释剂不浑浊，用氨基漆与合适比例的多异氰酸酯固化剂可配成综合性能优异的双组分聚氨酯

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。