Patent ID: 6423303
Filing Date: 2002-07-23
Classification: A47B,A61K,A61Q,B01F,C09G,C10M,C10N,F16B,Y10S

Abstract:
A water-in-oil emulsion comprising:(a) water; (b) from about 10 to 60% by weight of an oil; and (c) an emulsification system comprising a polysiloxane polyalkyl polyether copolymer and a phthalic anhydride derivative, the phthalic anhydride derivative having the formula: X a cation is selected from the group consisting of hydrogen ion, Na+, K+, Ba++, Ca++, Mg++, Al2+, Zn2+, +NH2R3R4 where R3 and R4 are the same or different and represent hydrogen or straight or branched chain alkyl groups having 8-40 carbon atoms, [NH3(R5OH)]+, [NH2 (R5OH)2]++, [NH(R5OH)3]+ where each R5 is a straight or branched chain alkylene group having from 1-6 carbon atoms, NH4+, R7NH3+, (R7)2NH2+, and (R2)3NH+, where each R7 is straight or branched chain alkyl having from about 1 to 6 carbon atoms, and R1 and R2 are the same or different and represent straight or branched chain alkyl groups having 1-40 carbon atoms, cycloalkyl groups having 3-18 carbon atoms, straight or branched chain alkenyl groups having 2-40 carbon atoms, alkylaryl groups where the alkyl portion is a straight or branched chain alkyl group having 1-6 carbon atoms and the aryl portion contains 5 to 10 carbon atoms, aryl alkyl where the alkyl portion is a straight or branched chain alkyl of 1-6 carbon atoms and the aryl portion contains 5 to 10 carbon atoms, or aryl groups having 5 to 10 carbon atoms, or R5â€”Oâ€”R6 where R5 and R6 are the same or different and represent straight or branched chain alkyl or alkenyl groups having 1-22 carbon atoms, the emulsification system substantially permanently maintaining the water and oil as an emulsion, and the emulsification system being substantially free from aluminum and zirconium salts, the emulsion being at a pH of from about 7-9.