POLYURETHANES, DISPERSIONS THEREOF, THEIR PREPARATION AND USE

• Main Authors: BERGER, SEBASTIAN, TRANTER, K. SHAUN, HICKL, MARKUS, THURY, PETER, BEK, MARTIN KAARUP, KACZUN, JURGEN, ZIJLSTRA, STEVEN
• Format: Patent
• Language: English; French
• Published: 22.05.2014
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; 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

The present invention relates to polyurethanes (A) being obtainable by reaction of (a)15% to 70% by weight of di-or polyisocyanate comprising on average from 1 to 10 allophanate groups and on average from 1 to 10 C-C double bonds per molecule, and optionally (b) 0% to 60% by weight of further di-or polyisocyanate, with (c) 5% to 50% by weight of compounds having at least two isocyanate-reactive groups, comprising at least one polycarbonate diol with a molecular weight from 500 to 3000g/mol weight %ages being based on total polyurethane (A), with the proviso that the total is 100%. La présente invention concerne des polyuréthannes (A) pouvant être obtenus par la réaction de (a) entre 15 % et 70 % en poids de diisocyanate ou polyisocyanate comportant en moyenne entre 1 et 10 groupes allophanates et en moyenne entre 1 et 10 liaisons doubles C-C par molécule, et éventuellement (b) entre 0 % et 60 % en poids davantage de diisocyanate ou polyisocyanate, avec (c) entre 5 % et 50 % en poids de composés comprenant au moins deux groupes réactifs à l'isocyanate, comportant au moins un diol de polycarbonate avec un poids moléculaire compris entre 500 et 3000 g/mol, les pourcentages pondéraux étant basés sur le polyuréthanne total (A), à condition que le total soit 100 %.