Liquid concentrate for the preservation of cosmetic and pharmaceutical products
AssigneeAir Liquide Sante (International)
InventorsGisela Hahn, Klaus Weber, Ralf Gradtke, Wolfgang Beilfuss
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Abstract
The invention relates to a liquid concentrate for the preservation of cosmetic and pharmaceutical products which comprises 3-iodo-2-propynyl butylcarbamate (IPBC), at least one liquid carrier selected from the group consisting of: polyvalent alcohols, glycol esters and glycol ethers, and at least one stabilizer selected from the group consisting of: formic acid, formic acid salts, and formate esters, and comprising no additional carboxylic acid selected from the group consisting of: benzoic acid, propionic acid, salicylic acid, sorbic acid, 4-hydroxybenzoic acid, dehydroacetic acid and 10-undecylenic acid and a salt thereof being present.
Claims60
A liquid concentrate preservative, comprising:
- a) 3-iodo-2-propynyl butylcarbamate (IPBC);
- b) at least one liquid carrier;
- c) at least one stabilizer;
- and
- d) polyhexamethylene biguanide, or a salt thereof, wherein,
- the weight ratio of said IPBC to said polyhexamethylene biguanide is from about 100:1 to about 1:100, and
- no additional carboxylic acid chosen from benzoic acid, propionic acid, salicylic acid, sorbic acid, 4-hydroxybenzoic acid, dehydroacetic acid, and 10-undecylenic acid, or the salts thereof, is present.
Dependencies are inferred from the claim text.