Back to results
US 2001/0018484 A1Published application
Polymeric thickeners for oil-containing compositions
AssigneeLandec Corporation
InventorsSteven P. Bitler, David D. taft
Life of this patent
Estimating the term…
Abstract
Thickeners for oil-containing compositions, particularly cosmetic and personal care compositions, are side chain crystalline polymers which are uniformly dispersed as a crystallized solid in the oil.
Claims20
A thickened oil composition which is at a temperature Ts and which comprises
- (1) an oil, and
- (2) uniformly dispersed in the oil as a crystallized solid, a side chain crystalline (SCC) polymer which
- (a) has a crystalline melting point, Tp, and an onset of melting temperature, To, and
- (b) is substantially free of fluorine atoms, carboxylic acid groups, carboxylic acid salt groups, sulfonic acid groups, sulfonic acid salt groups, amido groups, pyrrolidino groups and imidazole groups;
1 more element
A thickened oil composition which comprises
- (1) an oil, and
- (3) dispersed in the oil, a polymer which
- (a) has a crystalline melting point, To, and an onset of melting temperature, To, such that Tp−To is less than Tp07;
- (b) is soluble in the oil at temperatures above Tp,
- (c) has been dispersed in the oil by a process which comprises
- (i) dissolving the polymer in the oil at a temperature above Tp, and
- (ii) cooling the solution to crystallize the polymer in the oil, and
- (d) is a side chain crystalline (SCC) polymer which is substantially free of fluorine atoms, carboxylic acid groups, carboxylic acid salt groups, sulfonic acid groups, sulfonic acid salt groups, amido groups, pyrrolidino groups and imidazole groups;
- the composition being at a temperature Ts which is below Tp.
6 more elements
A thickened oil composition which is at a temperature Ts of 15 to 25° C., and which comprises
- (1) an oil, and
- (2) a side chain crystalline (SCC) polymer which
- (a) is uniformly dispersed in the oil as a crystallized solid,
- (b) has a crystalline melting point, Tp, of 43 to 48° C., and
- (c) consists essentially of
- (i) 70-99% by weight of repeating units derived from at least one n-alkyl acrylate or methacrylate ester in which the n-alkyl group contains 16 to 22 carbon atoms,
- (ii) 1-30% by weight of repeating units derived from at least one acrylate or methacrylate ester in which the ester group contains a hydroxyl-substituted alkyl group containing less than 12 carbon atoms, and
- (iii) 0-29% by weight of repeating units derived from at least one acrylate or methacrylate ester in which the ester group contains an unsubstituted alkyl group containing less than 16 carbon atoms.
5 more elements
A method of making a thickened oil composition comprising an oil and, dispersed in the oil, a side chain crystalline (SCC) polymer which
- (a) has a crystalline melting point, Tp, and an onset of melting temperature, To, such that Tp−To is less than Tp0.7, and
- (b) is substantially free of fluorine atoms, carboxylic acid groups, carboxylic acid salt groups, sulfonic acid groups, sulfonic acid salt groups, amido groups, pyrrolidino groups and imidazole groups;
- the method comprising
- (i) dissolving the SCC polymer in the oil at a temperature above Tp, and
- (ii) cooling the solution to crystallize the polymer in the oil.
2 more elements
Dependencies are inferred from the claim text.