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Preparation method for surface-modified quartz sand

A surface modification, quartz sand technology, applied in the field of inorganic materials, can solve the problems of poor compatibility, uniform dispersion, different interface properties, etc., to achieve the effect of improving performance and increasing compatibility

Inactive Publication Date: 2011-10-05
INNER MONGOLIA GOLD MIGHT BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different interface properties and poor compatibility between quartz sand and organic polymer resin materials, it is difficult to disperse evenly in it, and some physical and chemical properties of the products will also be reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The present invention adopts gamma-methacryloxypropyltrimethoxysilane coupling agent to carry out the process method of surface modification to quartz sand (20-40 mesh), and its process steps are as follows:

[0020] (1), prepare the diluent solution of γ-methacryloxypropyl trimethoxysilane coupling agent, diluent comprises ethanol (95%) and water, and its volume ratio is: ethanol (95%): water =9:1-6:1, adjust the pH value of the diluent to 3-4 with acetic acid.

[0021] (2) Take a certain amount of γ-methacryloxypropyltrimethoxysilane coupling agent, add the prepared diluent solution in a certain proportion, stir well to make it hydrolyze completely, and set it aside.

[0022] (3) Weigh a certain amount of -20-+40 mesh quartz sand, add it to a special high-speed heating mixer for dynamic heating, breaking up, etc., and heat to 100 ° C.

[0023] (4), now get -20-+40 mesh quartz sand accounts for 0.2%-0.5% of the hydrolyzed silane coupling agent in weight percentage, an...

Embodiment 2

[0026] The present invention adopts a kind of silane coupling agent to (-40--+60 mesh) carries out the technological process of surface modification, its raw material, the proportioning and consumption of diluent, coupling agent kind, preparation method of quartz sand are similar to Example 1 of this patent, but the modified quartz sand is -40-+60 mesh, and the amount of silane coupling agent (after hydrolysis) is 0, 3-0, 6% by weight of the quartz sand. The activation rate of the prepared modified quartz sand product (-40-+60 mesh) is ≥96.5%.

Embodiment 3

[0028] The present invention uses a silane coupling agent to modify the surface of quartz sand (-60-+120 mesh). Patent Example 1, but the modified quartz sand is -60-+120 mesh, and the amount of silane coupling agent (after hydrolysis) is 0, 4-0, 7% by weight of the quartz sand. The activation rate of the prepared modified quartz sand product (-60-+120 mesh) is ≥97.0%.

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Abstract

The invention relates to a method for modifying the surface of quartz sand by using a gamma-methacryloxy propyl trimethoxy silane coupling agent. The technical scheme for the invention is as follows: quartz sand is used as a raw material, a silane coupling agent is used as a surface modifier, and a high speed heating mixer is employed to modify the surface of the quartz sand through the silane coupling agent. The silane coupling agent and the quartz sand are subjected to reactions of condensation, dehydration and solidification, and therefore a solid covalent bond combination is formed between the silane coupling agent and the quartz sand. The surface-modified quartz sand has substantially improved compatibility with organic polymer resin materials, processing fluidity and dispersibility. When more surface-modified quartz sand and less resin are used in the production of artificial quartz stone slabs, the production cost of the slabs can be reduced, and physical and chemical properties and functions of the prepared slabs can be improved.

Description

1. Technical field [0001] The invention relates to a preparation method for surface modification of quartz sand by using a silane coupling agent. The method is to prepare high-quality surface-modified quartz sand by using quartz sand as a raw material, using a silane coupling agent as a surface modifier, and utilizing surface modification equipment. The invention belongs to the field of inorganic materials. The surface-modified quartz sand product prepared by the present invention is mainly suitable for the artificial quartz stone slab product industry, can endow or increase the addition amount of quartz sand in the artificial quartz slab product, and improve the physical and chemical properties and functionality of the product, Reduce the amount of resin added, and reduce the production cost of artificial quartz stone plates. 2. Technical background [0002] The content of silica in the quartz sand for artificial quartz stone plates is high (SiO 2 ≥99%), high whiteness (≥...

Claims

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Application Information

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IPC IPC(8): C04B14/06
CPCC04B20/1051C04B14/06C04B20/1018
Inventor 李宝智巴音巴图
Owner INNER MONGOLIA GOLD MIGHT BUILDING MATERIAL
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