Method of making hydroxymethylphosphonate, polyurethane foam-forming compositions, polyurethane foam and articles made therefrom
申请人:Stowell Jeffrey
公开号:US20100160468A1
公开(公告)日:2010-06-24
A method of making hydroxymethylphosphonate comprising heating paraformaldehyde in a solvent to a desired reaction temperature, wherein the solvent is present in at least an amount necessary to solvate or suspend the paraformaldehyde; adding at least one alkyl phosphite to the heated paraformaldehyde, to provide hydroxymethylphosphonate, the alkyl phosphite being added to the heated paraformaldehyde at a rate which will avoid or inhibit the production of a significant exotherm and resulting high/significant level of acid by-product(s), there being present in the reaction medium at least one hindered amine catalyst in which the nitrogen in the amine is directly bound to a secondary and/or tertiary carbon of an organic group; and, optionally, following the completion of the addition, heating the reaction mixture to an elevated temperature.
一种制备羟甲基膦酸酯的方法,包括在溶剂中加热多聚甲醛至所需反应温度,其中溶剂的存在量至少足够溶解或悬浮多聚甲醛;向加热的多聚甲醛中加入至少一种烷基膦酸酯,以提供羟甲基膦酸酯,所述烷基膦酸酯的加入速率将避免或抑制显著的放热反应和产生高/显著水平的酸性副产物,反应介质中至少存在一种受阻胺催化剂,其中胺中的氮直接结合到一个有机基的二级和/或三级碳上;在加入完成后,可选择将反应混合物加热至升高的温度。