[EN] METHODS FOR PREPARING MIXED POLYAMIDES, POLYIMIDES AND POLYAMIDEIMlDES VIA HYDROTHERMAL POLYMERIZATION<br/>[FR] PROCÉDÉS DE PRÉPARATION D'UN MÉLANGE DE POLYAMIDES, DE POLYIMIDES ET DE POLYAMIDEIMLDES PAR L'INTERMÉDIAIRE D'UNE POLYMÉRISATION HYDROTHERMALE
                        
                            
                                申请人:EXXONMOBIL RES & ENG CO
                            
                            
                                公开号:WO2021141807A1
                            
                            
                                公开(公告)日:2021-07-15
                            
                            Methods for preparing mixed polyamides, polyimides and polyamideimides under hydrothermal polymerization conditions are provided. The methods are based on suitable mixtures of poly carboxylic acids, poly carboxylic dianhydrides or poly carboxylic acid chloride anhydrides and polyamines and provide routes to low cost structural polymers useful in, for example, infrastructure applications.