C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/131, 400/741
C08G 18/38 (2006.01) C08G 18/08 (2006.01) C08G 18/50 (2006.01) C08L 75/08 (2006.01)
Patent
CA 1061043
Abstract of the Disclosure This invention relates to a process for the production of water dispersible polyurethanes by reacting polyisocyanates with sulphonate group containing diols. The sulphonate diol- have the general formula: Image wherein A and B, which may be the same or different, each represents a divalent aliphatic hydro- carbon group containing from 1 to 6 carbon atoms, R represents hydrogen an aliphatic hydro- carbon group containing 1 to 4 carbon atoms or a phenyl group, x(+) represents an alkali metal carbon or ammonium group which may be substitured n and m, which may be the same or different, each represents an integer between 0 and 30 inclusive, o and p, represent 0 or 1, and q represents an integer of 0 or 2 sufficient amounts of this diol are used to provide the final poymer with a suphonate group content of about 0.1 LeA 15,933 to 6 wt.%. In a preferred embodiment, a prepolymer is formed in substance with the sulphonate bearing diol, the polyiso- cyanate and optionally other reactive hydrogen bearing com- pounds. The prepolymer is then chain extended with water and water soluble polyamines. This second stage may take place in water and the polyamines may carry sulphonate groups.
235512
Dieterich Dieter
Grammel Jurgen
Reiff Helmut
Wenzel Wolfgang
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