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Method of controlling viscosity of fabric softeners

  • US 5,447,644 A
  • Filed: 05/12/1994
  • Issued: 09/05/1995
  • Est. Priority Date: 05/12/1994
  • Status: Expired due to Fees
First Claim
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1. A method for controlling the viscosity of fabric softener compositions to thereby improve shelf life comprising:

  • forming a non-aqueous phase of a microemulsion of a perfume and a surfactant by mixing a perfume and a surfactant with an HLB number which is 12 or greater at a temperature where each of said perfume and surfactant is in the liquid state, and then mixing said non-aqueous phase under conditions of sufficient high shearing forces to uniformly disperse said perfume in said surfactant and to prevent air entrainment to thereby form a stable, clear microemulsion of said perfume in said surfactant,mixing together said clear microemulsion and a fabric softener base formulation in sufficient amounts to thereby form a fabric softener composition which avoids gelation.

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