Mechanical microemulsions of blended silicones
AssigneeDow Corning Corporation
InventorsMarie-Agnes Leboucher, Joanna Newton, Linda Denise Kennan
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Abstract
A microemulsion is formed by combining (a) water, (b) a nonionic surfactant, a cationic surfactant, an anionic surfactant, or a mixture of such surfactants, (c) a linear non-volatile polysiloxane, (d) an amine functional polysiloxane, and (e) a carboxylic acid. The mixture is mechanically agitated until a microemulsion is obtained containing polysiloxane particles having an average diameter of less than 50 nanometer (0.05 micron/500 angstrom Å). These microemulsions are useful in paper coating, textile coating, and home care applications. They can also be used to deliver silicone polymers of tailored rheological properties to the human body.
Claims5
A method of making a microemulsion comprising the steps of (i) forming a mixture comprising (a) water, (b) a nonionic surfactant, a cationic surfactant, an anionic surfactant, or a mixture of such surfactants, (c) a linear non-volatile polysiloxane, (d) an amine functional polysiloxane, and (e) a carboxylic acid;
- and (ii) mechanically mixing the mixture formed in (i) until a micromulsion is obtained containing polysiloxane particles having an average diameter of less than 50 nanometer (0.05 micron/500 angstro Å), the linear non-volatile polysiloxane (c) having the formula:
- where R1 is an alkyl group containing 1-6 carbon atoms, and a represents an integer having a value greater than 5 and less than about 400.
Dependencies are inferred from the claim text.