Isocyanate reactions, such as their condensation with polyols to form polyurethanes and their polymerization to polyisocyanurates, are promoted by certain hydroxyalkyl tertiary amine catalysts corresponding to the formula ##STR1## wherein Y = CH.sub.3 or ZZ = -- CH.sub. 2.CH.sub.2 OHn = 1...
Reaction with nitrates and nitrites: the reaction of MIC with nitrates and nitrites, which are normally present in water, can yield carcinogenic nitrosamines. 11. Decomposition into hydrogen cyanide (HCN): when MIC pyrolyzes into the gaseous phase in the range 427–548°C at 55–300 torr, th...
Open image in new window Evidence for the foregoing scheme is: (1) Reaction with alcoholic potash yielded a compound in agreement with the reaction: Open image in new window The product of this reaction gave a yellow oil on reaction with nitrous acid, suggesting a secondary amine. (2) ...
The Mechanism of Tin—Amine Synergism in the Catalysis of Isocyanate Reaction with Alcohols 来自 dx.doi.org 喜欢 0 阅读量: 33 作者: IS Bechara 摘要: Tertiary amines and tin carboxylates are important catalysts in the production of polyurethane foams from polyisocyanates and and polyhydroxy ...
(2) There was no reaction of the reaction product with nitrous acid. The nitrogen of this compound is thus not present in the form of a primary or secondary amine. (3) The product of the reaction was broken down by heating with concentrated hydrochloric acid in a sealed tube at 200° ...
互联网 The reaction kinetics of synthesizing arylisocyanateby aryl amine and phosgene was studied. 研究了芳胺和光气反应生成异氰酸酯的反应动力学. 互联网 展开全部 英英释义 Noun 1. a salt or ester of isocyanic acid 行业词典 石油 异氰酸盐
A highly efficient synthetic route, based on the quantitative reaction between amine and isocyanate functionalities, was used successfully for the synthesi... AV Ambade,A Kumar - 《Journal of Polymer Science Part A Polymer Chemistry》 被引量: 87发表: 2001年 Novel one‐pot syntheses of sulfur‐...
A process for the preparation of a flexible material expanded polyurethane endowed with flame resistance, which comprises reacting: a) an isocyanic component obtainable from the reaction of at least one organic isocyanate which is at least bifunctional, with an amine secondary having the general form...
S.ROONEYChemischer InformationsdienstDenny. G. H., Cragoe, E. J., Rooney. C. S.. Springer, J. P., Hirshfield. J. M.. McLanley. J. Α.: Reactions of Alkyl Isocyanates and Chlorosulfonyl Isocyanate with 1H- Tetrazol-5-amine and Conversion of Reaction Products to (lH-Tetrazol-5-yl)...
with hydroxyl-containingmoleculesto form aurethane(carbamate) linkage(Reaction 3.43). The reactivity of isocyanates is excellent, but for the same reason their stability can be a problem. In storage, moisture decomposes them, releasing CO2and leaving an aromatic amine in its place. In aqueous ...