BISULFITE ADDITION PRODUCTS OF BIURETTPOLYISOCYANATE

    公开(公告)号:JPS5297914A

    公开(公告)日:1977-08-17

    申请号:JP1218877

    申请日:1977-02-08

    摘要: Bisulphite adducts of biuret-polyisocyanates are prepared by reacting an aqueous solution containing more than 200 gm/l. of sodium bisulphite with a selected alcohol and a biuret-polyisocyanate having one of the following structures: (III) +TR (IV) (V) wherein R in each occurrence is the same or different divalent alkyl, cycloalkyl, aryl or aralkyl radical. A preferred adduct is the adduct of N,N',N''-tris(6-isocyanatohexyl) biuret. The adducts are useful for the treatment of fibrous materials, particularly as shrink-resisting agents, for surface coatings and for forming elastomers.

    25.
    发明专利
    失效

    公开(公告)号:JPS5088028A

    公开(公告)日:1975-07-15

    申请号:JP14061574

    申请日:1974-12-09

    摘要: A method for producing a storage-stable undistilled phosgenation product, preferably derived from m-toluene diamines, which comprises treating the undistilled phosgenation product with a weak acid, at an elevated temperature whereby the carbodiimides are converted to species which do not react with isocyanates.