Patent ID: 7947633
Filing Date: 2011-05-24
Classification: A61K,A61Q,C09K,Y10S

Abstract:
1. A viscoelastic composition comprising water, at least one polycationic quaternary ammonium compound to control the viscoelasticity of the composition, wherein the at least one polycationic quaternary ammonium compound comprises a dissymmetric bis-quaternary compound of the following general formula: wherein R 2 , R 3 , R 4 , R 5 , and R 6 are members independently selected from the group consisting of: (a) hydrocarbyl groups having from about 1 to about 4 carbon atoms; and (b) substituted hydrocarbyl groups having from about 1 to about 4 carbon atoms; wherein R 7 is a member selected from the group consisting of hydrocarbyl groups having from about 2 to about 30 carbon atoms, and substituted hydrocarbyl groups having from about 2 to about 30 carbon atoms; wherein R 1 is a member selected from the group consisting of hydrocarbyl groups having from about 13 to about 40 carbon atoms or substituted hydrocarbyl groups having from about 13 to about 40 carbon atoms; wherein A 1 − and A 2 − are independently selected from the group consisting of: (i) negatively charged inorganic ions; (ii) organic molecules with one or more negatively charged functional groups; and (iii) negatively charged functional groups which are part of R the composition further comprising from about 5% to about 75% by weight of at least one inorganic salt; wherein the viscoelastic composition provides viscoelasticity at a temperature of at least about 80° C.