Methods and compositions for preparing compositions containing functionalized mineral particles
A technology of mineral particles and compositions, applied in the direction of dyeing organosilicon compounds, silicon compounds, chemical instruments and methods, etc., can solve the problems of weakening the expected effect of materials, and achieve the effect of simple implementation
Active Publication Date: 2018-08-14
CENT NAT DE LA RECHERCHE SCI +1
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- Application Information
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Problems solved by technology
In fact, the finer mineral particles have a tendency to agglomerate with each other, reducing the desired effect on the final properties of the material when they are used
Method used
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Embodiment 1
[0183] Prepare in 300mL water containing formula Si 4 Mg 3 o 10 (OH) 2 A suspension of talc particles containing 100 g of talc gel (or 10 g of dry talc). The suspension was magnetically stirred while sonicating until a suspension of uniform consistency and milky white appearance was obtained.
[0184] Next the functionalized oxysilane was added to the suspension containing the talc particles. 1 g of previously diluted 1-(trimethoxysilylpropyl)-3-methylimidazolium chloride was added to 20 mL of water. The oxysilane was contacted with the talc particles in the functionalization solution such that the molar ratio between the oxysilane and the talc particles was 0.13. Maintain magnetic stirring and sonication for 10 min.
[0185] 1-(trimethoxysilylpropyl)-3-methylimidazolium chloride has the developed chemical formula:
[0186]
[0187] The suspension was then centrifuged at 10,000 rpm for 10 minutes, and the supernatant consisted of water and excess functionalized oxysi...
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Abstract
The invention relates to a process for the preparation of compositions containing mineral particles functionalized by at least one organic group, said mineral particles having a specific surface area greater than 500 m2 / g according to the BET method, wherein: Composition of mineral particles exhibiting a thickness of less than 100 nm and a largest dimension of less than 10 μm; at least one functionalizing agent is selected among oxysilanes and oxygermanes having at least one functional group, said The phyllosilicate composition is contacted with a functionalization solution containing a functionalizing agent to obtain a phyllosilicate composition containing mineral particles functionalized by said organic groups, characterized in that said organic groups are selected from from cationic heteroaryl groups, quaternary ammonium groups and their salts. The invention also relates to phyllosilicate compositions readily obtainable by said process.
Description
technical field [0001] The present invention relates to a process for the preparation of compositions containing mineral particles functionalized by at least one organic group. The invention also relates to compositions comprising mineral particles functionalized by at least one organic group. Background technique [0002] Various minerals such as borates or silicates are used in various industrial fields. [0003] For example, natural talc is of the formula Si 4 Mg 3 o 10 (OH) 2 The hydroxylated magnesium silicate belongs to the layered silicate family. Phylosilicates are formed by the irregular superposition of basic layers of the crystalline structure, the number of layers varying from a few units to thousands of units. Among the phyllosilicates (phyllosilicates), a group of substances including especially talc, mica and montmorillonite, are characterized by the fact that each basic layer is formed by the association of two layers of tetrahedrons flanking an octahed...
Claims
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IPC IPC(8): C01B33/44C09C1/42C09C3/12
CPCC01B33/44C09C1/0081C01P2002/22C01P2002/72C01P2004/04C01P2004/61C01P2004/64C01P2004/20C01P2006/12C09C1/3081
Inventor C·勒鲁F·马丁P·米库A·迪马
Owner CENT NAT DE LA RECHERCHE SCI