Visco-elastic, isotropic materials based on water, fluorinate sufactants and fluorinated oils, process for their preparation, and their use in various fields, such as optics, pharmacology and electrodynamics

• US 5,185,099 A
• Filed: 11/14/1991
• Issued: 02/09/1993
• Est. Priority Date: 04/20/1988
• Status: Expired due to Fees

• Current Assignee: Institut National de Recherche Chimique Appliquee
• Original Assignee: Institut National de Recherche Chimique Appliquee
• Inventors: Matos, Louis, Serratrice, Guy, Stebe, Marie-Jose, Selve, Claude, Moumni, El Mostafa, Thiollet, Gerard, Delpuech, Jean-Jacques, Ravey, Jean-Claude, Cambon, Aime
• Primary Examiner(s): Stoll, Robert L.
• Assistant Examiner(s): TUCKER, PHILIP C
• Application Number:
  US07/794,375
• Time in Patent Office: 453 Days
• Field of Search: 252/315.1, 252/315.01, 252/312
• US Class Current: 516/102
• CPC Class Codes: A61K 8/042 Gels
• CPC Class Codes: A61K 8/70 containing perfluoro groups, e.g. perfluoroethers
• CPC Class Codes: A61K 9/0026 Blood substitute; Oxygen transporting formulations; Plasma extender
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: B01J 13/0065 containing an organic phase
• CPC Class Codes: C09K 23/007 Organic compounds containing halogen
• CPC Class Codes: C10M 173/02 not containing mineral or fatty oils
• CPC Class Codes: C10M 2201/02 Water
• CPC Class Codes: C10M 2211/02 containing carbon, hydrogen and halogen only
• CPC Class Codes: C10M 2211/042 Alcohols; Ethers; Aldehydes; Ketones
• CPC Class Codes: C10M 2211/06 Perfluorinated compounds
• CPC Class Codes: C10M 2215/042 containing hydroxy groups; Alkoxylated derivatives thereof
• CPC Class Codes: C10M 2221/04 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C10M 2221/041 involving sulfurisation of macromolecular compounds, e.g. polyolefins
• CPC Class Codes: C10M 2221/043 Polyoxyalkylene ethers with a thioether group
• CPC Class Codes: C10N 2040/00 Specified use or application for which the lubricating composition is intended
• CPC Class Codes: C10N 2040/22 with essential removal of material , e.g. cutting, grinding or drilling
• CPC Class Codes: C10N 2040/30 Refrigerators lubricants or compressors lubricants
• CPC Class Codes: C10N 2040/32 Wires, ropes or cables lubricants
• CPC Class Codes: C10N 2040/34 Lubricating-sealants
• CPC Class Codes: C10N 2040/36 : Release agents or mold release agents
• CPC Class Codes: C10N 2040/38 : Conveyors or chain belts
• CPC Class Codes: C10N 2040/40 : Generators or electric motors in oil or gas winning field
• CPC Class Codes: C10N 2040/42 : Flashing oils or marking oils
• CPC Class Codes: C10N 2040/44 : Super vacuum or supercritical use
• CPC Class Codes: C10N 2040/50 : Medical uses
• CPC Class Codes: C10N 2050/01 : Emulsions, colloids, or micelles

Abstract

These materials having the appearance and the consistency of gels are characterized in that they contain a very high proportion of water, of the order of from 60 to 98% weight, and that their structure is a microcellular compartmentalized structure having a very high density of water droplets enclosed in a fine surfactant membrane and contained in a continuous oil/surfactant phase, this structure being impermeable to water and permeable to hydrophobic compounds soluble in fluorocarbons.

Use in the field of optics, fillers, cosmetics, pharmacology, lubricants, textiles, photochemistry and electrodynamics.

Claims

1. Viscoelastic materials having the apperance and consistency of gels comprising fluorinated surfactants, fluorinated oils, and a solvent composition selected from the group consisting of water and mixtures of water and a water-miscible solvent, said materials containing from 60 to 98% by weight of water;

wherein a continuous phase of said materials comprises a mixture of said fluorinated surfactants and said fluorinated oils;

wherein said surfactant is a nonionic surfactant selected from the group consisting of

(1) compounds of the formula R_F (CH₂)_P R(OH) wherein p is less than 3, R_F is a perfluorinated carbon chain, and R represents a chain of (OC₂ H₄) units, in which at least one oxygen atom is optionally replaced by a sulfur atom; and

(2) compound of the formula ##STR2## wherein p is less than 3; and

(3) surfactants having an HLB, according to the Griffin formula, of less than 8, comprising a hydrophilic group containing O(C₂ H₄)_n groups wherein n>

2 and a fluorinated hydrophobic group RF containing (C_x F2_x) groups wherein 4<

x<

12.

2. Visco-elastic materials according to claim 1

wherein the structure of said viscoelatic materials is a microcellular compartmentalized structure having a very high density of droplets containing solvent compositions.

3. Viscoelastic materials according to claim 1 wherein said droplets have a size on the order of one micron.

4. Viscoelastic materials according to claim 1 wherein said solvent composition is a mixture of water and a water-miscible solvent selected from the group consisting of dimethylsulfoxide and propylene glycol.

5. Viscoelastic materials according to claim 1 having an electrical conductivity of about 0.46 μ

S/cm.

6. Viscoelastic materials according to claim 1 wherein the hydrophilic-lipophilic balance is less than 8.

7. Viscoelastic materials according to claim 6 wherein the hydrophilic-lipophilic balance is from 4 to 6.