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Cleaning compositions based on 1,1,1,2,2,4,4-heptafluorobutane and C.sub.1 -C.sub.3 alcohols

  • US 5,747,437 A
  • Filed: 10/30/1996
  • Issued: 05/05/1998
  • Est. Priority Date: 10/31/1995
  • Status: Expired due to Fees
First Claim
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1. An azeotropic or azeotrope-like composition consisting essentially of, by weight of said composition, about 90-99% of 1,1,1,2,2,4,4-heptafluorobutane, about 1-10% of methanol, and optionally a stabilizer, wherein said composition has a boiling point of about 30.6°

  • C. at normal pressure.

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