Water-repellent composition and windscreen washer with a rain-repellent effect comprising it , in particular for a vehicle windscreen
AssigneeDeohn SA
InventorsGerard Abidh, Laurent Levasseur, Patrick Le
Life of this patent
Estimating the term…
Abstract
The water-repellent composition, in particular for a windscreen washer liquid, comprises a compound of organopolysiloxane type as hydrophobic active agent and a solvent. According to the invention, the composition is used in combination with a solubilizing mixture comprising: at least one ether alcohol, as third solvent, one nonionic silicone surfactant and one cationic surfactant.
Claims11
Rain-repellent water-repellent composition, capable of being incorporated in a windscreen washer liquid, comprising a compound of organo-polysiloxane type as hydrophobic active agent and a solvent, characterized in that the composition is used in combination with a solubilizing mixture comprising:
- at least one ether alcohol, as third solvent, one nonionic silicone surfactant and one cationic surfactant.
Composition according to the preceding claim, characterized in that the ether alcohol is a propylene-based glycol ether with an ignition point of less than 100° C.
Composition according to the preceding claim, characterized in that the glycol ether is monopropylene glycol monoethyl ether.
Composition according to the preceding claim, characterized in that the nonionic surfactant is a dimethylpolysiloxane modified with polyalkylene oxide.
Composition according to the preceding claim, characterized in that the cationic surfactant comprises cationic imidazoline.
Windscreen washer composition comprising water and at least one alcohol, characterized in that it also comprises a composition according to one of the preceding claims.
Composition according to the preceding claim, characterized in that it comprises:
- from 0.01% to 10% of the said third solvent and preferably from 1 to 1.5%
- from 0.001% to 3% of the said nonionic surfactant
- from 0.005% to 0.5% of the said cationic surfactant
- from 0.01% to 1% of the hydrophobic agent
- from 1% to 50% of alcohol.
Process for the preparation of a windscreen washer composition according to the preceding claim, characterized in that it comprises the following stages:
- a composition comprising the said compound of organopolysiloxane type in solution in a solvent is introduced into an alcohol or a mixture of alcohols,
- the compounds of the said solubilizing mixture are added,
- the mixture is made up with water.
Dependencies are inferred from the claim text.