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US 6,444,630 B1Granted
Molten mix process for making synthetic bar composition having higher levels of soap while retaining good finishing properties
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsTerence James Farrell, John Richard Nicholson, Keith Francis
Life of this patent
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Abstract
The invention provides a molten process for making compositions comprising anionic, surfactant soap and free fatty acid using a source of divalent cation sufficiently soluble to interact with soluble soaps. This allows greater amounts of soap to be used while retaining good finishing properties.
Claims6
A process for making bars comprising:
- (1) 20% to 75% by wt. of an anionic surfactant;
- (2) 4% to 20% fatty add soap or soap fraction having solubility equal to or greater than 82/18 tallow/coconut soap;
- (3) 4% to 30% free fatty acid;
- and
- (4) a compound or compounds which is source of divalent cation when solubilized at a temperature of about 0° C. which process comprises mixing (1), (2) and (3) and a compound or compounds which is a source of divalent cation (4), solubilizing said divalent cation at a temperature of about 0° C. in order to provide sufficient available cation to interact with soluble soap, react with a transition state formed during the process and thereby increase throughput 10-200%, said throughput being defined by extrusion rate and/or number of bars stamped per minute.
2 more elements
Dependencies are inferred from the claim text.