COLOR-STABLE CURING AGENT COMPOSITIONS COMPRISING WATER-DISPERSIBLE POLYISOCYANATES

• Main Authors: FREDERIC, Lucas, ROLLER, Sebastian
• Format: Patent
• Language: English; French
• Published: 05.08.2021
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

A polyisocyanate composition comprising (A) at least one polyisocyanate obtainable by reacting (c) at least one diisocyanate or polyisocyanate, (d) at least one surfactant comprising a mixture of compounds based on the following formulae (I) and (II); in which R1 and R2 independently of one another are alkyl, cycloalkyl or aryl, it being possible for each of the stated radicals to be substituted by aryl, alkyl, aryloxy, alkyloxy, heteroatoms and/or heterocycles, said mixture of compounds of formulae (I) and (II) being characterised in that the molar ratio between compound (II), i.e. the monoester-type compound, and compound (I), i.e. the diester-type compound, is from 5:95 to 95:5, and (c) at least one monofunctional polyalkylene glycol, - and (B) at least one sterically hindered phenol. L'invention concerne une composition de polyisocyanate comprenant : (A) au moins un polyisocyanate pouvant être obtenu par réaction (c) d'au moins un diisocyanate ou un polyisocyanate, (d) d'au moins un tensioactif comprenant un mélange de composés de formules (I) et (II) suivantes ; dans lesquelles R1 et R2 représentent indépendamment l'un de l'autre un alkyle, un cycloalkyle ou un aryle, chacun des radicaux mentionnés pouvant être substitué par un aryle, un alkyle, un aryloxy, un alkyloxy, des hétéroatomes et/ou des hétérocycles, ledit mélange de composés de formules (I) et (II) étant caractérisé en ce que le rapport molaire entre le composé (II), c'est-à-dire le composé de type monoester, et le composé (I), c'est-à-dire le composé de type diester, varie de 5/95 à 95/5, et (c) au moins un polyalkylène glycol monofonctionnel, et (B) au moins un phénol à encombrement stérique.