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US 6,180,117 B2Granted
Method of preparing microemulsions of amino silicone fluids and MQ resin mixtures
AssigneeGeneral Electric Company
InventorsMarianne D. Berthiaume, James H. Merrifield, Donna A. Riccio
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Abstract
Microemulsion compositions comprising MQ resins and microemulsifiable amino silicone fluids or gums and a surfactant having a high phase inversion temperature, the microemulsions formed therewith, a means for preparing said microemulsions, and personal care products comprising said microemulsions.
Claims13
A process for preparing a transparent microemulsion comprising:
- (a) preparing a blend comprising a low amino content silicone and an MQ resin wherein said low amino content microemulsifiable silicone has the formula:
- M(RaQbSiO(4−a−b)/2)x(RcSiO(4−c)/2)yM
- wherein R is a hydrocarbon or hydrocarbon radical having from 1 to about 6 carbon atoms, Q is a polar radical having the general formula —R1HZ, wherein R1 is a divalent linking group bound to hydrogen and a radical Z wherein R1 is comprised of carbon and hydrogen atoms;
- carbon, hydrogen and oxygen atoms, or carbon, hydrogen and nitrogen atoms;
- and Z is an amino containing radical having the formula:
- —N(CH2)z(CH2)zzNH
- wherein z is one or greater and zz is zero or greater subject to the limitation such that when zz is zero Z has the formula:
- —NH(CH2)zNH2
- wherein z is one or greater;
- a ranges from about 0 to about 2, b ranges from about 1 to about 3 such that a+b is less than or equal to 3, and c is a number in the range of from about 1 to about 3;
- and x is a number in the range of from 5 to about 2,000, and y is a number in the range of from about 800 to about 10,000, and M is a silicone endstopping group;
- and wherein said MQ resin has the formula:
- where both R1 and R2 are independently selected from the group consisting of alkyl hydrocarbon radicals having from 1 to 12 carbon atoms, and both M1 and M2 are independently selected from the group consisting of phenyl, phenethyl, polyether, hydrogen, and alkyl hydrocarbon radicals having from 1 to 23 carbon atoms in any combination subject to the limitation that the ratio of the subscripts j, k, and l satisfies the following relationship:
- 0.5≦(j+k)/l≦4.0.
- (b) adding a surfactant having a phase inversion temperature ranging from about 45 to 0° C. about 95° C. to said blend;
- (c) heating said blend and said surfactant to a temperature ranging from about 45° C. to 95° C. said temperature being below the phase inversion temperature of said surfactant;
- (d) adding part I water;
- (e) adding an acid;
- and
- (f) adding part II water said microemulsion being cooled whereby said microemulsion has an ASTM D871 haze below about 150 and a mean particle size ranging from about 0.005 microns to about 0.050 microns.
17 more elements
A translucent oil-in-water microemulsion comprising:
- (a) a microemulsifiable amino silicone and an MQ resin, said MQ resin selected from the group of MQ resins having the formula:
- where both R1 and R2 are independently selected from the group of alkyl hydrocarbon radicals having from 1 to 12 carbon atoms, and both M1 and M2 are independently selected from the group of polyether having the formula:
- H2C═C—CR3—(O—CHR4—CH2)u—(OCH2CH2)v—OR5
- R3 is —(CH2)n— where n ranges from 1 to about 20, R4 is a one to twenty carbon alkyl group, and R5 is selected from the group consisting of H, —CH3, and —C(O)CH3;
- and where u and v are integers ranging from 0 to 20 subject to the limitation that u+v≧1 subject to the limitation that the ratio of the subscripts j, k, and l satisfies the following relationship:
- 0.5≦(j+k)/l≦4.0.
- wherein said microemulsifiable amino silicone has a viscosity ranging from 100 to 10,000,000 centistokes at 25° C. and wherein said MQ resin has a viscosity ranging from 50 to 5,000 centistokes at 25° C.;
- and
- (b) a surfactant having a phase inversion temperature varying from about 45° C. to about 95° C., and
- (c) water.
7 more elements
Dependencies are inferred from the claim text.