Patent ID: 6221370
Filing Date: 2001-04-24
Classification: A61K,A61Q,Y10S

Abstract:
A method for the production of a phase inversion temperature (PIT) emulsion comprising:(a) forming a stable emulsifier mixture comprising:(1) at least one fatty acid ethoxylate corresponding to the formulaR.sup.1 CO(CH.sub.2 CH.sub.2 O).sub.n H (I)wherein R.sup.1 CO is a linear or branched acyl group having from 12 to 22 carbon atoms and n is a number of from 5 to 50; and(2) at least one partial glyceride corresponding to the formula ##STR2##wherein R.sup.2 CO is a linear or branched acyl group having from 12 to 22 carbon atoms and the sum of x, y, and z is a number of from 0 to 50;(b) mixing at weight percentages based on the emulsion:(1) 1 to 10% of said stable emulsifier mixture;(2) 10 to 50% of at least one oil selected from the group consisting of Guerbet alcohols based on fatty alcohols having from 6 to 18 carbon atoms, esters of linear C.sub.6-20 fatty acids with linear C.sub.6-20 fatty alcohols, esters of branched C.sub.6-13 carboxylic acids with linear C.sub.6-20 fatty alcohols, esters of linear C.sub.8-18 fatty acids with branched alcohols, esters of linear and/or branched fatty acids with polyhydric alcohols and/or Guerbet alcohols, triglycerides based on C.sub.6-10 fatty acids, vegetable oils, branched primary alcohols, substituted cyclohexanes, Guerbet carbonates, dialkyl ethers and/or aliphatic or naphthenic hydrocarbons;(3) 1 to 50% auxiliaries and additives; and(4) water to form a PIT emulsion.