Aqueous composition for rendering a substrate hydrophobic

a technology of hydrophobic and aqueous composition, which is applied in the direction of organic fertilisers, fertilizer mixtures, other chemical processes, etc., can solve the problems of limiting the use of the process, the quantity of water needed to apply methylsiliconate on a given surface is too large, and the cost of methylsiliconates is high, so as to increase the hydrophobicity of the substrate

Inactive Publication Date: 2005-07-14
JACQUES VIONNET
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

First, the quantity of water needed to apply the methylsiliconate on a given surface is too great (about 10 to 20 m3 / hectare) and second, the cost of methylsiliconates is high, limiting the use of the process in many cases due to economic reasons.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0020] 1. Synergic Effect of Silicate / Siliconate on Hydrophobing Capacity Test Method

[0021] A reference sample of sand is treated with a number of reactive agents, either alone or in isotropic admixtures and, after reaction, the degree of hydrophobicity imparted is evaluated. Thus, 100 ml of sand are mixed homogeneously with 20 ml of water containing defined quantities of industrial potassium methylsiliconate at 28% supplied by RHODIA (GSP) and / or technical grade sodium silicate SI), waterglass supplied by Riedel-deHan, at 28% equivalent in SiO2. After mixing, each sample of treated sand is dried in an oven (60° C. / 12 h), and tested after reaction for the degree of hydrophobicity on the dried crust and in the crushed mass using the “water drop” technique.

TABLE 1HYDROPHOBING TREATMENTDegree of hydrophobicity induced by industrialpotassium methylsiliconate (GSP) and technical gradesodium silicate (SI) as described above on sandHYDROPHOBICITYGSPSIDEGREE*)TRIAL(ppm)(ppm)a) crustb) ma...

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Abstract

A substrate treatment method for imparting hydrophobicity to a substrate or for rendering the substrate hydrophobic. This method includes the step of treating an agricultural soil substrate by applying an aqueous solution that preferably includes a mixture of sodium and / or potassium methylsiliconate and sodium and / or potassium silicate. The method imparts hydrophobicity to the substrate and renders it hydrophobic.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of application Ser. No. 09 / 902,555 filed Jul. 10, 2001, the entire content of which is incorporated herein by reference thereto.BACKGROUND [0002] The present invention concerns an aqueous composition for rendering a substrate hydrophobic, as well as the use of this composition and a process for rendering the aforementioned substrate hydrophobic. [0003] It is well known that the application of hydrophobing agents (namely substances, in the present description, that render the substrate water repellant), on an arid soil permits a substantial economy of water, because the treated surface presents an efficient barrier against the evaporation of irrigation water. European patent application 889,109 discloses the use of sodium or potassium methylsiliconate to render a substrate hydrophobic. This process, however, presents two disadvantages. First, the quantity of water needed to apply the methylsiliconate on a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K3/18C09K17/36
CPCC09K17/36C09K3/18
Inventor HIRSBRUNNER, PIERREHORMAN, IAN
Owner JACQUES VIONNET
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