摘要:
The present invention is a process for aliphatic or cycloaliphatic isocyanate. The process comprises reacting an aliphatic or cycloaliphatic primary amine, with phosgene in the presence of an inert solvent wherein the initial reaction temperature is between 100 and 130° C. and the temperature is subsequently ramped to 150 to 180° C. during the course of the reaction, the solvent to amine weight ratio is 95:5 to 80:20, the total reaction pressure is maintained between 50 and 350 psig and the amine is rapidly dispersed in the phosgene through injection in a region of high efficiency mixing.
摘要:
Fullerene compounds represented by the formulae Cm[C(R)CON3]n, Cm[C(R)NCO]n, Cm[C(R)NHCORd]n, and Cm[C(R)NH2]n, wherein Cm represents a fullerene moiety having m carbon atoms, m represents an even integer from about 60 to about 200, n represents an integer of about 1 or more, R represents an electron-withdrawing group, and Rd represents an alkoxy or alkylamino group. In addition, processes for preparing these fullerene compounds involving reacting an acyl azide with a fullerene in the presence of a base.
摘要:
A process for the production of olefinically unsaturated isocyanates by reacting a1) isophorone diisocyanate or mixtures of isophorone diisocyanate with a2) other organic polyisocyanates with b1.1) olefinically unsaturated carboxylic acids or mixtures thereof with b1.2) other monobasic or polybasic carboxylic acids, b2.1) olefinically unsaturated alcohols and/or b2.2) other monohydric or polyhydric alcohols, the unsaturated resulting isocyanates and their use as binders for one-component coating compositions which may be cured at room temperature.
摘要:
The present invention relates to polyisocyanate mixtures which are solid below 40.degree. C. and liquid above 125.degree. C. and which havea) an average isocyanate functionality of at least 2.1,b) a content of free isocyanate groups bonded to tertiary (cyclo)aliphatic carbon atoms (calculated as NCO; molecular weight=42) of 5 to 22 wt. %,c) a urethane group content calculated as --NH--CO--O--; molecular weight=59) of 2 to 30 wt. %,d) an isocyanurate group content (calculated as C.sub.3 N.sub.3 O.sub.3 ; molecular weight=126) of 0 to 30 wt. % ande) a carboxylic acid ester group content (calculated as --CO--O--; molecular weight=44) of 0 to 25 wt. % and/orf) a carbonate group content (calculated as --O--CO--O--; molecular weight=60) of from 0 to 34 wt. %with the proviso that the total amount of ester groups e) and carbonate groups f) is at least 2 wt. %.The present invention also relates to a process for the production of these polyisocyanate mixtures and to their use for the production of polyurethanes, in particular as the crosslinking component in heat-curable two-component polyurethane powder coatings for coating heat-resistant substrates.
摘要:
2,2-Difluorocyclopropyl derivatives of the formula ##STR1## in which R represents alkyl, optionally substituted aryl or optionally substituted aralkyl andX represents hydroxymethyl, 2-hydroxyethyl, isocyanato, amino, amino hydrohalide or a radical of the formula --CO--R.sup.1, whereR.sup.1 represents hydrogen, hydroxyl, alkoxy, alkyl, halogen or amino,are intermediates for fungicides.
摘要:
The present invention relates to diisocyanates having an isocyanate content of from about 20 to 50% by weight, optionally in the form of isomeric mixtures, characterized in that, in addition to containing a sterically unhindered isocyanate group attached to a primary aliphatic carbon atom, they contain a sterically hindered isocyanate group attached to a tertiary carbon atom which forms part of a cycloaliphatic ring system.The invention also relates to the use of the new diisocyanates, optionally blocked with blocking agents for isocyanate groups, as isocyanate component for the preparation of polyurethanes.
摘要:
Process for the continuous production of 1-isocyanato-3(isocyanatomethyl)-3,5,5-trimethylcyclohexane by phosgenation of 1-amino-(3-aminomethyl)-3,5,5-trimethylcyclohexane derivatives having the formula
摘要:
The production of isocyanates by reaction of carbamyl chlorides with water in the presence of acids. Isocyanates prepared by the process of the invention are valuable starting materials for the production of plant protection agents, pesticides, dyes, synthetic resins and plastics, textile waterrepellents, detergents, bleaching agents and adhesives.
摘要:
IN WHICH R1 to R4 are the same as defined above, including N=CCl2 as optional further substituent for said substituted radicals, and being usable as intermediates for producing plastics auxiliaries, or directly for the production of isocyanates which optionally may be converted in turn with amines into ureas in the known manner, or directly as plant protection agents.
Production of 2-chloro-alkyl-(or cycloalkyl or aromatic)isocyanide dichlorides by reacting an olefin of the formula IN WHICH R1 to R4 each individually is hydrogen, alkyl, cycloalkyl, aromatic having up to 10 carbon atoms, or such radicals optionally substituted with NO2, halo, or alkoxy, or R1 and R2 together with the GROUP FORM AN ALICYCLIC RING SYSTEM OPTIONALLY CONTAINING AN SO2- group with hydrocyanic acid and with a chlorine-contributing compound, e.g. chlorine or sulfuryl chloride, in an amount at least equivalent to the sum total of the quantities of olefin and hydrocyanic acid used, e.g. at a temperature of about -10* to +40* C; the produced isocyanide dichlorides having the corresponding formula
摘要:
THE ETHYLENIALLY UNSATURATED GROUP OF AN ORGANIC COMPOUND IS CONVERTED TO A BETA-CHLORO ISOCYANATO GROUP BY THE USE OF CL2, AND ISOCYANIC ACID IN THE PRESENCE OF AN IODOARYL COMPOUND.