[EN] METHOD FOR PRODUCING CYCLIC CARBONATES<br/>[FR] PROCÉDÉ POUR PRODUIRE DES CARBONATES CYCLIQUES
申请人:HATTI-KAUL RAJNI
公开号:WO2012158107A1
公开(公告)日:2012-11-22
Linear or cyclic carbonates as potential monomers for isocyanate-free polyurethanes and polycarbonates were prepared from polyols and dialkylcarbonatesor diphenyl carbonates. This invention was developed to produce linear or cyclic carbonates with or without using catalysts. Polyol compounds were reacted with carbonates such as dimethylcarbonate and diethylcarbonate to produce thecorresponding linear and/or cyclic carbonate.
A curable resin composition utilizing as the crosslinking mechanism thereof an acid catalyzed addition reaction of a cyclic alkylenecarbonate group with an alcoholic hydroxyl group is disclosed. The composition contains a compound or polymer having a plurality of 6-membered cyclic alkylenecarbonate groups and a polymer having a plurality of alcoholic hydroxyl groups. A polymer having pluralities of the cyclic alkylenecarbonate and hydroxyl groups in a single entity may also be used. The composition cures at room or elevated temperatures depending upon the acidity and amount of particular acid catalyst incorporated to the composition.