| abstract |
The invention relates to an anion aqueous polyurethane dispersoid for leather finishing. The anion aqueous polyurethane dispersoid mainly is mainly prepared by the following raw materials by mass portion: 100 mass portions of polyether polyalcohol, 30 to 80 mass portions of diphenylmethane diisocyanate isomer combination, 6 to 15 mass portions of diol containing carboxyls, 0.5 to 6 mass portions of micromolecular cross-linker and 0.2 to 4 mass portions of amine chain extender; and 0.001 to 1 mass portion of catalyzer is an alternative. The dispersoid has the advantages of good mechanical performance, solvent resistance, hydrolysis resistance, high strength, rapid solidification, etc. |