Synthetic detergent bar with antimushing agent (3951842)

Inventors:
Leon M. Prince, Joseph P. Furrier
Company:
Lever Brothers Company
Issued Date:
1976-04-20
Tags:
sodium chloride, sodium sulfate

Abstract

Toilet detergent bars having the property of softening in the soap dish to form a slimy, gel-like, mushy hydrate, and containing about 30 to about 60 percent sodium acyl isethionate detergent are made firmer and the tendency to form a mushy hydrate is decreased, and the rate of drying of the hydrate is increased, if there is incorporated in the bar a dimerized linoleic acid, or a mixture of sodium sulfate and sodium chloride. [USPTO]

Claims

What is claimed is:

1. A toilet detergent tablet comprising from about 30 to about 60 percent of water-soluble alkali metal detergent salts of esters of isethionic acid with mixed aliphatic fatty acids having from 6 to 18 carbon atoms and an iodine value of less than 20, of which mixed acids at least 75 percent have from twelve to eighteen carbon atoms and up to 25 percent have from 6 to 10 carbon atoms, from 2 to 10 percent of at least one water-soluble suds-boosting detergent salt selected from the group consisting of alkali metal and organic amine higher aliphatic fatty alcohol sulfates, alkyl aryl sulfonates, and the higher aliphatic fatty acid taurides, from about 1 to about 9 percent water, from about 2.5 to about 25 percent of water-soluble higher fatty acid soap, from 10 to 40 percent of at least one higher fatty acid having from about 25 carbon atoms as a binder and plasticizer, and an anti-mushing agent in the proportions of about 3 to about 25 percent, wherein said anti-mushing agent is (a) linoleic acid dimer of (b) linoleic acid dimer together with a mixture of sodium sulfate and sodium chloride, said tablet having improved hardness, improved firmness recovery characteristics, and being substantially free from efflorescence, and having a pH within the range of about 6 to about 8, measured as a 10 percent aqueous solution of the bar composition at 35.degree.C.

2. A toilet detergent in accordance with claim 1 wherein said anti-mushing agent is linoleic acid dimer in the proportions of about 3 to about 10 percent, by weight of said tablet.

3. A toilet detergent tablet in accordance with claim 1 wherein said anti-mushing agent is a mixture of sodium sulfate in the proportion of about 4 percent, sodium chloride in the proportion of about 3 percent, and linoleic acid dimer in the proportion of about 3 percent, said proportions being by weight of said tablet.

4. A process for lessening the mushing tendencies of a toilet detergent tablet containing an acyl isethionate in a proportion not exceeded by any other component therein, and in the proportions of about 30 to about 60 percent, comprising incorporating into said tablet from about 3 to about 20 percent of an anti-mushing agent selected from the group consisting of linoleic dimer acid, and linoleic acid dimer mixed with sodium sulfate and sodium chloride, the salts being present within the ratios of about 3:2 to about 2:3, said tablet having improved hardness, improved firmness recovery characteristics, and being substantially free from efflorescence, and having a pH within the range of about 6 to about 8, measured as a 10 percent aqueous solution of the bar composition at 35.degree.C.

5. A toilet detergent tablet comprising

wherein the acyl portion of said isethionate is derived from coconut oil, said fatty acid is selected from the group consisting of palmitic and stearic acids, said soap is the sodium salt of an aliphatic monocarboxylic acid having from about 8 to about 18 carbon atoms, of which about 18-22 percent has 8-14 carbon atoms, and the alkyl group of said alkylbenzenesulfonate is derived from a straight-chain hydrocarbon mixture having an average of about 13 carbon atoms.

6. A toilet detergent tablet comprising

wherein the acyl portion of said isethionate is derived from coconut oil, said fatty acid is selected from the group consisting of palmitic and stearic acids, said soap is the sodium salt of an aliphatic monocarboxylic acid having from about 8 to about 18 carbon atoms, of which about 18-22 percent has 8-14 carbon atoms, and the alkyl group of said alkylbenzenesulfonate is derived from a straight-chain hydrocarbon mixture having an average of about 13 carbon atoms.

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