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Non-ionic polyurethane dispersions having side chains of polyoxyethylene

  • US 3,920,598 A
  • Filed: 03/18/1974
  • Issued: 11/18/1975
  • Est. Priority Date: 03/23/1973
  • Status: Expired due to Term
First Claim
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1. IN THE PREPARATION OF A POLYURETHANE LATEX BY A ROCESS WHEREIN A DIFUNCTIONAL ORGANIC COMPOUND HAVING REACTIVE HYDROGEN ATOMS AND AN ORGANIC DIISOCYANATE ARE REACTED TOGETHER AND THE RESULTING POLYURETHANE IS DISPERSED IN WATER, THE IMPROVEMENT WHICH COMPRISES REACTING THE SAID COMPOUND HAVING REACTIVE HYDROGENS WITH AN ORGANIC DIISOCYANATE HAVING A MOLECULAR STRUCTURE WHICH CONTAINS AN ALLOPHANATE OR BIURET GROUP ATTACHING A SIDE CHAIN HAVING REPEATING -OCH2-CH2-GROUPS THERETO.

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