Low pH detergent bar

Claim 2

A milled synthetic detergent bar providing a pH of from about 4 to about 7 at a use concentration of about 1% by weight in water and consisting essentially of (a) from about 20% to about 40% by weight of a synthetic detergent selected from the group consisting of coconut-oil fatty acid ester of sodium isethionate and sodium lauryl sulfoacetate and mixtures thereof; (b) from about 15% to about 25% by weight of paraffin; (c) from about 7.5% to about 13.5% by weight powdered starch; (d) from about 12.5% to about 25% by weight dextrin; (e) coconut-oil fatty acid in an amount up to about 2.5% by weight to improve plasticity of the paraffin and to improve sudsing performance; (f) from about 9.0% to about 14.5% by weight water; (g) from about 0.5% to about 5% microcrystalline wax; (h) from about 0.5% to about 5% by weight lauric diethanolamide; and (i) lactic acid to adjust the pH.

Claim 3

A bar as recited in claim 1, in which the synthetic detergent ingredient is coconut-oil fatty acid ester of sodium isethionate and in which the powdered starch consists of both gelling pregelatinized starch and non-gelling 100% amylopectin starch.

Claim 4

A bar as recited in claim 2, in which the paraffin ingredient is a fully refined petroleum wax having a melting point ranging from about 130° F. to about 140° F; in which the dextrin ingredient consists of both dextrin having a water solubility ranging from about 25% to about 55% (in 72° F. water) and dextrin having a water solubility ranging from about 60% to 85% (in 72° F. water) and in which the dextrin having a water solubility ranging from 25% to about 55% is present in an amount ranging from about 2% to about 20% by weight and the dextrin having a water solubility ranging from about 60% to about 85% is present in an amount ranging from about 5% to about 20% by weight, in which the microcrystalline wax has a melting point ranging from about 140° F. to about 160° F.; in which sodium chloride is present as an additional ingredient at a level of from about 0.5% to about 4% by weight; and in which lactic acid is used to adjust the pH to range from 5.0 to 7.0.

Claim 5

A bar as recited in claim 3, in which the coconut-oil fatty acid is present in an amount ranging from about 1.5% to about 2.5%.

Claim 6

A bar as recited in claim 1, in which the synthetic detergent ingredient is sodium lauryl sulfoacetate and in which the powdered starch is non-gelling 100% amylopectin starch.

Claim 7

A bar as recited in claim 5, in which the paraffin ingredient is a fully refined petroleum wax having a melting point ranging from about 130° F. to about 140° F.; in which the microcrystalline wax has a melting point ranging from about 140° F. to about 160° F.; and in which lactic acid is used to adjust the pH to range from 5.0 to 7.0.

Claim 8

A bar as recited in claim 6, in which the coconut-oil fatty acid is present in an amount ranging from about 1.5% to about 2.5%.

Claim 9

A bar as recited in claim 1, in which the synthetic detergent ingredient consists of both sodium lauryl sulfoacetate and coconut-oil fatty acid ester of sodium isethionate, and in which the isethionate is present in an amount ranging from about 10% to about 25% by weight and the sulfoacetate is present in an amount from about 10% to about 20% by weight.

Claim 10

A bar as recited in claim 8, in which the paraffin ingredient is a fully refined petroleum wax having a melting point ranging from about 130° F. to about 140° F.; in which the powdered starch consists of gelling pregelatinized starch; in which the dextrin ingredient consists of dextrin having a water solubility ranging from about 25% to about 55%; in which the microcrystalline wax has a melting point ranging from about 140° F. to about 160° F.; in which sodium chloride is present as an additional ingredient at a level of from about 0.5% to about 4% by weight; and in which lactic acid is used to adjust the pH to range from 5.0 to 7.0.

Claim 11

A bar as recited in claim 9, in which the coconut-oil fatty acid is present in an amount ranging from about 1.5% to about 2.5%.

Claim 12

A bar as recited in claim 1, in which the coconut-oil fatty acid is present in an amount ranging from about 1.5% to about 2.5%.