Alkyl phosphate and aqueous emulsions thereof

• US 6,448,297 B1
• Filed: 06/01/2000
• Issued: 09/10/2002
• Est. Priority Date: 12/18/1997
• Status: Expired due to Fees

• Current Assignee: Clariant Produkte AG (Clariant AG)
• Original Assignee: Clariant GmbH (Clariant AG)
• Inventors: Löffler, Matthias, Turowski-Wanke, Angelika
• Primary Examiner(s): Lovering, Richard D.
• Application Number:
  US09/585,115
• Time in Patent Office: 831 Days
• Field of Search: 516/56, 516/24, 516/907, 514/846, 514/939, 510/436
• US Class Current: 516/56
• CPC Class Codes: A61K 8/06 Emulsions
• CPC Class Codes: A61K 8/062 Oil-in-water emulsions
• CPC Class Codes: A61K 8/064 Water-in-oil emulsions, e.g. Water-in-silicone emulsions
• CPC Class Codes: A61K 8/342 Alcohols having more than seven atoms in an unbroken chain
• CPC Class Codes: A61K 8/375 the alcohol moiety containing more than one hydroxy group
• CPC Class Codes: A61K 8/39 Derivatives containing from 2 to 10 oxyalkylene groups
• CPC Class Codes: A61K 8/41 Amines
• CPC Class Codes: A61K 8/55 Phosphorus compounds
• CPC Class Codes: A61K 8/86 Polyethers
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: C07F 9/11 with hydroxyalkyl compounds without further substituents on alkyl
• CPC Class Codes: Y10S 516/907 The agent contains organic compound containing phosphorus, e.g. lecithin

Abstract

The invention relates to alkyl phosphates, in particular their mixtures, of the formula

in which R is C₁₂-C₂₂-alkyl, preferably C₁₄-C₁₈-alkyl, X is a group of the formulae NH₃R¹, NH₂R²R³ or NHR⁴R⁵R⁶, Y is as defined for R or is as defined for X, and R¹ is C₈-C₂₂-alkyl, R² and R³ are C₁-C₂₂-alkyl or cyclohexyl, and R⁴, R⁵ and R⁶ are C₁-C₄-alkyl. These compounds, in particular the mixtures of mono- and diesters, are suitable as emulsifiers in the preparation of aqueous emulsions.

Claims

1. An alkyl phosphate of the formula

in which R is a mixture of from 0.1 to 5 weight percent of β

-branched C₁₂-C₂₂-alkyl and from 99.9 to 95.0 linear C₁₂-C₂₂ alkyl, X is a group of the formulae NH₃R¹, NH₂R²R³ or NHR⁴R⁵R⁸, Y is as defined for R or is as defined for X, and R¹ is C₈-C₂₂-alkyl, R² and R³ are C₁-C₂₂-alkyl or cyclohexyl, and R⁴, R⁵ and R⁶ are C₁-C₄-alkyl.

2. A mixture of alkyl phosphates as claimed in claim 1, which comprises from 0 to 10% by weight of the corresponding triester.

3. A mixture of alkyl phosphates as claimed in claim 1, wherein the linear C₁₂-C₂₂ alkyl portion of R is C₁₄-C₁₈ alkyl.

4. A mixture of alkyl phosphates as claimed in claim 1, wherein X and Y are C₁₄-C₁₈-alkylammonium.

5. An aqueous emulsion comprising an alkyl phosphate as claimed in claim 1.

6. An aqueous emulsion comprising from 0.1 to 5% by weight of an alkyl phosphate as claimed in claim 1.

7. An aqueous emulsion comprising an alkyl phosphate as claimed in claim 1, wherein X and/or Y is a mixture of C₁₂-C₂₂-alkylammonium and alkali metal cation.