申请人:Benckiser-Knapsack GmbH
公开号:US04337214A1
公开(公告)日:1982-06-29
Disclosed are novel N-(hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids and N,N-Bis-(hydroxy-methyl)-1-amino alkane-1,1-diphosphonic acids, preferably N-(hydroxy methyl)-1-amino ethane-1,1-diphosphonic acid, N,N-Bis-(hydroxy methyl)-1-amino ethane-1,1-diphosphonic acid, and their water-soluble salts. Also disclosed is a method for preparing these compounds by reacting the corresponding 1-amino alkane-1,1-diphosphonic acids with formaldehyde in an alkaline medium at elevated temperature. The new phosphonic acid compounds are excellent stabilizing agents for hydrogen peroxide-containing alkaline bleaching liquors, especially useful for bleaching cellulose fibers and blends thereof with synthetic fibers, such as polyester fibers.
本发明涉及新型N-(羟甲基)-1-氨基烷基-1,1-二膦酸和N,N-双(羟甲基)-1-氨基烷基-1,1-二膦酸,优选为N-(羟甲基)-1-氨基乙烷-1,1-二膦酸,N,N-双(羟甲基)-1-氨基乙烷-1,1-二膦酸及其水溶性盐。还公开了一种制备这些化合物的方法,即在碱性介质中以升高的温度反应相应的1-氨基烷基-1,1-二膦酸和甲醛。这些新的膦酸化合物是氢氧化物-含量的碱性漂白液的优良稳定剂,特别适用于漂白纤维素纤维及其与合成纤维(如聚酯纤维)的混合物。