Process for preparing non-ionic polyurethane emulsions

Details Process for preparing non-ionic polyurethane emulsions Process for preparing non-ionic polyurethane emulsions

1976-01-12

1977-03-15

Ziegler, J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 775AM, C08G 1832, C08J 306

Patent

active

040123499

ABSTRACT:
A process for preparing non-ionic polyurethane emulsions comprising chain-extending (A) an isocyanate-terminated urethane prepolymer (formed by reaction of a polyhydroxyl reactant having a molecular weight of 200 to 10,000 and a stoichiometric excess of a polyisocyanate), with (B) a polyalkylene polyamine as chain extending compound, thereby to form a polyurethane-urea polyamine product, mixing the said polyamine product with water or reacting the product with a cyclic dicarboxylic acid anhydride and then mixing the reaction product with water; said process being characterized in that a water-soluble polyoxyethylene glycol comprises 15 to 80% by weight of the polyhydroxyl reactant, and the said polyalkylene polyamine used as the chain-extending compound has at least two primary or secondary amino groups and a functional group having the formula --CH(OH)--CH.sub.2 X in which X is Cl or Br.

REFERENCES:
patent: 3826768 (1974-07-01), Suzuki et al.
patent: 3903031 (1975-09-01), Matsuda et al.
patent: 3903032 (1975-09-01), Matsuda et al.

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