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Esters containing bonded fluorocarbon and oxypropylenealkylether groups, emulsions containing these esters and their use for the preparation of cellular plastics by polyisocyanate polyaddition

  • US 5,126,379 A
  • Filed: 12/18/1990
  • Issued: 06/30/1992
  • Est. Priority Date: 12/19/1989
  • Status: Expired due to Fees
First Claim
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1. A blowing agent-containing emulsion which has a long shelf life and containsi) at least one partially fluorinated or perfluorinated aliphatic and/or cycloaliphatic hydrocarbon of 3 to carbon atoms which is sparingly soluble or insoluble in (ii), and/or sulfur hexafluoride,ii) at least one organic and/or modified organic polyisocyanate and at least one relatively high molecular weight compound having at least two reactive hydrogen atoms or a mixture of at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and at least one low molecular weight chain extender and/or crosslinking agent andiii) at least one ester of the formula ##STR8## where Rf is straight-chain or branched, partially fluorinated or perfluorinated alkyl of 2 to 10 carbon atoms, partially fluorinated or perfluorinated cycloalkyl of 4 to 8 carbon atoms, perfluorophenyl or perfluoroalkylphenyl where the perfluoroalkyl radical is of 1 to 6 carbon atoms, R is straight-chain or branched alkyl of 1 to 4 carbon atoms and n is an integer from 2 to 70.

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