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Pourable detergent concentrates which maintain or increase in viscosity after dilution with water

  • US 5,922,664 A
  • Filed: 05/06/1997
  • Issued: 07/13/1999
  • Est. Priority Date: 01/30/1995
  • Status: Expired due to Fees
First Claim
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1. An aqueous laundry detergent concentrate composition consisting of (i) a micellar dispersion of a mixture of at least two surfactants having differing resistance to electrolytic salting out such that at least one of said surfactants is resistant to salting out and at least one other of said surfactants is not resistant to salting out, said mixture consisting of at least one anionic surfactant which is an alkyl polyethoxy sulfate wherein the alkyl group ranges from 10 to 18 carbon atoms and the polyethoxy is of 2 to 11 ethylene oxide groups, and at least one nonionic surfactant which is an ethoxylated fatty alcohol wherein the fatty alcohol ranges from 6 to 18 carbon atoms and the ethoxylated fatty alcohol having 2 to 11 ethylene oxide groups, and (ii) a dissolved electrolyte salt which is an alkali metal citrate, said concentrate has a viscosity in the range of about 100 to 200 cps and said electrolyte salt is present in said concentrate at a level such that, upon dilution of said concentrate with an amount of water of from about 0.5 to about 5 volumes of water per volume of concentrate, said micellar surfactant dispersion is converted at least partially into a lamellar phase dispersion providing a diluted concentrate having a viscosity in excess of 400 cps.

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