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Transparent detergent bar
| Details |
Inventors: Nagashima, Tetsuya; Usuba, Yasunori; Ogawa, Takahisa; Takehara, Masahiro;
Assignee: Ajinomoto Co., Inc. (Tokyo, JP); Kawaken Fine Chemicals Co., Ltd. (Tokyo, JP)
Primary Examiner: Albrecht; Dennis L.
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
A transparent detergent bar possessing good foaming power and detergency in hard water is formulated consisting essentially of at least one salt of a N-long chain acyl-optically active acidic amino acid neutralized with a basic amino acid in the ratio of 1 mol of the former to 1 to 2 mols of the latter and water in the range of 5 to 35% based on the weight of the bar apart from water. Other adjuvents may be present. |
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DETAILED DESCRIPTION What we claim is: 1.
A transparent detergent bar possessing good foaming power and detergency in hard water consisting essentially of at least one basic amino acid salt of N-long chain acyl-optically active acidic amino acid prepared by the neutralization reaction of 1 mol of N-long chain acyl-optically active acidic amino acid with 1 to 2 mols to basic amino acid and water, the amount of water being in the range of 5 to 25% by weight of the detergent bar apart from water when the neutralization degree of the basic amino acid salt is 1.
0 to 1.
5 equivalent and 5 to 35% by weight of the detergent bar apart from water when the neutralization degree is 1.
6 to 2.
0 equivalent.
2.
A transparent detergent bar as set forth in claim 1, wherein said long chain acyl group is the acyl radical of a saturated or unsaturated fatty acid having 10 to 20 carbon atoms.
3.
A transparent detergent bar as set forth in claim 1, wherein said optically active acidic amino acid is at least one member selected from the group consisting of L or D form of aspartic acid, glutamic acid, cysteic acid and homocysteic acid.
4.
A transparent detergent bar as set forth in claim 1, wherein said basic amino acid is at least one member selected from the group consisting of L or D form of lysine, arginine and ornithine.
5.
A transparent detergent bar as set forth in claim 1, further containing urea, wherein the ratio by weight of the amount of basic amino acid salt of N-long chain acyl-optically active acidic amino acid to the amount of urea is from 95:5 to 50:50.
6.
The detergent bar of claim 1, containing as adjuvants at least one of a polyhydric alcohol and a saccharide, an additional surface active agent and, optionally, a perfume and coloring matter, the adjuvants being present in amount that they do not inhibit the transparency of the bar.
7.
A method of making a transparent solid detergent bar possessing good foaming power and detergency in hard water which comprises dissolving at least one basic amino acid salt of N-long chain acyloptically active acidic amino acid of neutralization degree of 1 to 2 equivalent in a mixture of lower alcohol and water, pouring the resultant solution into a frame, cooling, solidifying, cutting and drying into a shaped solid bar, the amount of water being in the range of 5-25% by weight of the detergent bar apart from water when the neutralization degree of the said basic amino acid salt is 1
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Molecular Biology 
