EP 4259685 A1 20231018 - PROCESS FOR PREPARING A POLYISOCYANATE, POLYISOCYANATE, ITS USE AND POLYADDITION PRODUCTS PREPARED THEREFROM
Title (en)
PROCESS FOR PREPARING A POLYISOCYANATE, POLYISOCYANATE, ITS USE AND POLYADDITION PRODUCTS PREPARED THEREFROM
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES POLYISOCYANATS, POLYISOCYANAT, DESSEN VERWENDUNG UND DARAUS HERGESTELLTE POLYADDITIONS¬PRODUKTE
Title (fr)
PROCÉDÉ DE PRÉPARATION D`UN POLYISOCYANATE, POLYISOCYANATE, SON UTILISATION ET PRODUITS DE POLYADDITION PRÉPARÉS À PARTIR DE CE DERNIER
Publication
Application
Priority
- EP 20213043 A 20201210
- EP 21194917 A 20210903
- EP 2021084975 W 20211209
Abstract (en)
[origin: WO2022122906A1] The present invention relates to a process for preparing a polyisocyanate, namely a isocyanate group-terminated polyol polyanthranilic acid ester. The process comprises the step of reacting an anthranilic acid derivated selected from anthranilic acid halide (in particular anthranilic acid chloride), isatoic anhydride or a mixture thereof with a first polyol of a number-average molar mass of at least 200 g/mol and a functionality in the range of 2 to 8, and obtaining, as a result, a polyamine (namely a polyol polyanthranilic acid ester with amine terminal groups) and reacting the polyamine with phosgene and obtaining, as a result, a polyisocyanate (namely an isocyanate group-terminated polyol polyanthranilic acid ester). The invention further relates to the polyisocyanates obtained in this way, their use in polyaddition reactions, and polyaddition products obtainable by these reactions.
IPC 8 full level
C08G 18/76 (2006.01); C07C 227/18 (2006.01); C07C 263/10 (2006.01); C07C 265/12 (2006.01); C08G 18/77 (2006.01)
CPC (source: EP US)
C07C 227/18 (2013.01 - EP US); C07C 263/10 (2013.01 - EP US); C07C 265/12 (2013.01 - EP US); C08G 18/7657 (2013.01 - EP US); C08G 18/771 (2013.01 - EP US); C07C 2527/10 (2013.01 - US)
Citation (search report)
See references of WO 2022122906A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022122906 A1 20220616; EP 4259685 A1 20231018; US 2024018097 A1 20240118
DOCDB simple family (application)
EP 2021084975 W 20211209; EP 21823919 A 20211209; US 202118256219 A 20211209