;The granular or powdery nitrogen-containing phenol-aldehyde copolymer resin may be produced by a process which comprises contacting a phenol and a nitrogen-containing compound having at least two active hydrogen atoms with a hydrochloric acid-formaldehyde bath containing 3 to 28% by weight of hydrochloric acid, 3 to 25% by weight of formaldehyde and 0 to 10% by weight of another aldehyde with the total concentration of hydrochloric acid and formaldehyde being 10 to 40% by weight, while maintaining a bath ratio, defined by the quotient of the weight of the hydrochloric acid-formaldehyde bath divided by the total weight of the phenol and the nitrogen-containing compound, of at least 8, said contacting being effected such that after contacting of the phenol and the nitrogen-containing compound with the bath, white suspended particles are formed and thereafter developed into a granular or powdery solid."/>
公开/公告号EP0071061B1
专利类型
公开/公告日1986-05-21
原文格式PDF
申请/专利号EP19820106161
申请日1982-07-09
分类号C08G14/06;C08J3/12;
国家 EP
入库时间 2022-08-22 07:36:09