Non-flammable, high-solvency compositions comprising trans-1,2-dichloroethylene, solvent, and inerting agent

  • US 6,852,684 B1
  • Filed: 09/17/1999
  • Issued: 02/08/2005
  • Est. Priority Date: 09/21/1998
  • Status: Expired due to Term
First Claim
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1. A composition comprising:

  • a.) about 55 to about 75 weight percent trans-1,2-dichloroethylene; and

    b.) about 15 weight percent or less of at least one solvent selected from the group consisting of;

    i.) oxygen-containing solvents selected from the group consisting of alcohols, ketones, esters, siloxanes, and ethers; and

    ii.) hydrocarbon solvents selected from the group consisting of those represented by CtH2t+2 and CtH2t, wherein t is from 4 to 12; and

    c.) about 20 to about 45 weight percent of at least one i.) hydrofluorocarbon inerting agents selected from the group consisting of those represented by the formula CxHyF(2x+2−

    y)
    , wherein x is from 3 to 8, y is from 1 to 4, the mole ratio of F/H in the hydrofluorocarbon inerting agent is greater than 1.6, and wherein when the inerting agent is hydrofluorocarbon the weight ratio of hydrofluorocarbon inerting agent to solvent is at least about 1.5;

    ii.) hydrochlorofluorocarbon inerting agents selected from the group consisting of those represented by the formulae C2HCl2F3 and C2HClF4, and wherein when the inerting agent is hydrochlorofluorocarbon the weight ratio of hydrochlorofluorocarbon inerting agent to solvent is at least about 2, wherein said composition is non-flammable by Flame Extension Test ASTM D-3065 and Flash Point-Tag Closed Cup Test ASTM D-56-82, and said composition has a Kauri Butanol value of at least about 40 by ASTM 1133-94.

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