Storage-stable compositions of glycerol monoalkyl ethers
AssigneeAir Liquide Sante (International)
InventorsWolfgang Beilfuss, Ralf Gradtke
Life of this patent
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Abstract
The present invention relates to compositions which comprise a combination a) of one or more glycerol monoalkyl ether(s) of the general formula R—O—CH2—CHOH—CH2OH in which R is a branched or unbranched C3-C18-alkyl group, where the alkyl group can be substituted by one or more hydroxyl and/or C1-C4-alkoxy group(s) and/or the alkyl chain can be interrupted by up to four oxygen atoms, with b) an antioxidant or two or more antioxidants as stabilizer(s), the simultaneous presence of phosphocholines and phosphocholine derivatives being excluded.
Claims23
Composition characterized in that it comprises a combination
- a) of one or more glycerol monoalkyl ether(s) of the general formula
- R—O—CH2—CHOH—CH2OH
- in which R is a branched or unbranched C3-C18-alkyl group, where the alkyl group can be substituted by one or more hydroxyl and/or C1-C4-alkoxy group(s) and/or the alkyl chain can be interrupted by up to four oxygen atoms, with
- b) an antioxidant or two or more antioxidants chosen from the group consisting of acetylcysteine, 3-tert-butyl-4-hydroxyanisole, 2,6-di-tert-butyl-p-cresol, tert-butylhydroquinone, caffeic acid, chlorogenic acid, cysteine, cysteine hydrochloride, decylmercaptomethylimidazole, diamylhydroquinone, di-tert-butylhydroquinone, dicetyl thiodipropionate, digalloyl trioleate, dilauryl thiodipropionate, dimyristyl thiodipropionate, dioleyl tocopheryl methylsilanol, disodium rutinyl disulphate, distearyl thiodipropionate, ditridecyl thiodipropionate, dodecyl gallate, erythorbic acid, ethyl ferulate, ferulic acid, hydroquinone, p-hydroxyanisole, hydroxylamine hydrochloride, hydroxylamine sulphate, isooctyl thioglycolate, kojic acid, madecassicoside, methoxy-PEG-7-rutinyl succinate, nordihydroguaiaretic acid, octyl gallate, phenylthioglycolic acid, phloroglucinol, propyl gallate, rosmarinic acid, rutin, sodium erythorbate, sodium thioglycolate, sorbityl furfural, thiodiglycol, thiodiglycolamide, thiodiglycolic acid, thioglycolic acid, thiolactic acid, thiosalicylic acid, tocophereth-5, tocophereth-10, tocophereth-12, tocophereth-18, tocophereth-50, tocophersolan, tocopherol (in particular vitamin E) and its derivatives (in particular vitamin E derivatives such as vitamin E acetate, vitamin E linoleate, vitamin E nicotinate and vitamin E succinate), o-tolylbiguanide, tris(nonylphenyl) phosphite, dexpanthenol, alpha-hydroxycarboxylic acids (in particular glycolic acid, lactic acid, mandelic acid) and salts thereof, p-hydroxybenzoic esters (in particular methyl, ethyl, propyl or butyl esters thereof), dimethyloldimethylhydantoin, N-acylamino acids and salts thereof (in particular N-octanoylglycine) and hinokitol as stabilizer(s),
- the simultaneous presence of phosphocholines and phosphocholine derivatives being excluded.
Concentrate characterized in that it comprises
- a) from 99.5 to 99.95% by weight of 3-[(2-ethylhexyl)oxy]-1,2-propanediol and
- b) 0.05 to 0.5% by weight of an antioxidant chosen from the group consisting of vitamin E and its derivatives, 3-tert-butyl-4-hydroxyanisole and 2,6-di-tert-butyl-p-cresol, preferably vitamin E and vitamin E acetate, and mixtures thereof.
Use of an antioxidant chosen from the group consisting of acetylcysteine, 3-tert-butyl-4-hydroxyanisole, 2,6-di-tert-butyl-p-cresol, tert-butylhydroquinone, caffeic acid, chlorogenic acid, cysteine, cysteine hydrochloride, decylmercaptomethylimidazole, diamylhydroquinone, di-tert-butylhydroquinone, dicetyl thiodipropionate, digalloyl trioleate, dilauryl thiodipropionate, dimyristyl thiodipropionate, dioleyl tocopheryl methylsilanol, disodium rutinyl disulphate, distearyl thiodipropionate, ditridecyl thiodipropionate, dodecyl gallate, erythorbic acid, ethyl ferulate, ferulic acid, hydroquinone, p-hydroxyanisole, hydroxylamine hydrochloride, hydroxylamine sulphate, isooctyl thioglycolate, kojic acid, madecassicoside, methoxy-PEG-7-rutinyl succinate, nordihydroguaiaretic acid, octyl gallate, phenylthioglycolic acid, phloroglucinol, propyl gallate, rosmarinic acid, rutin, sodium erythorbate, sodium thioglycolate, sorbityl furfural, thiodiglycol, thiodiglycolamide, thiodiglycolic acid, thioglycolic acid, thiolactic acid, thiosalicylic acid, tocophereth-5, tocophereth-10, tocophereth-12, tocophereth-18, tocophereth-50, tocophersolan, tocopherol (in particular vitamin E) and its derivatives (in particular vitamin E derivatives such as vitamin E acetate, vitamin E linoleate, vitamin E nicotinate and vitamin E succinate), o-tolylbiguanide, tris(nonylphenyl) phosphite, dexpanthenol, alpha-hydroxycarboxylic acids (in particular glycolic acid, lactic acid, mandelic acid) and salts thereof, p-hydroxybenzoic esters (in particular methyl, ethyl, propyl or butyl esters thereof), dimethyloldimethylhydantoin, N-acylamino acids and salts thereof (in particular N-octanoylglycine) and hinokitol, and mixtures thereof for the long-term stabilization of a glycerol monoalkyl ether of the general formula
- R—O—CH2—CHOH—CH2OH
- in which R is a branched or unbranched C3-C18-alkyl group, where the alkyl group can be substituted by one or more hydroxyl and/or C1-C4-alkoxy group(s) and/or the alkyl chain can be interrupted by up to four oxygen atoms.
Dependencies are inferred from the claim text.