Method for composite modification of microcrystalline antonite powder using epoxy silane and aluminate
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A technology of microcrystalline muscovite and epoxy silane coupling agent, which can be used in dyeing organosilicon compound treatment, fibrous fillers, etc., and can solve problems such as undiscovered
Inactive Publication Date: 2008-12-17
CHENGDU UNIVERSITY OF TECHNOLOGY
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After searching, no patent application or literature report on the process method of compound modification o
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Embodiment 1
[0040] The present invention adopts a kind of γ-(2,3-glycidoxy) propyltrimethoxysilane coupling agent and aluminate coupling agent composite modified microcrystalline muscovite (400 mesh) process, its The process steps are as follows:
[0041] (1) Preheat and dry the microcrystalline muscovite powder, the drying temperature is 110±5°C, and the drying time is 60 minutes.
[0042] (2) prepare the diluent solution of γ-(2,3-glycidoxy) propyl trimethoxysilane coupling agent, diluent comprises dehydrated alcohol and water, and its volume ratio is: dehydrated alcohol: water =8:2, the amount of diluent per kilogram of microcrystalline muscovite powder is 300ml.
[0043] (3) Weigh 1.0% gamma-(2,3-epoxypropoxy)propyltrimethoxysilane coupling agent that accounts for microcrystalline muscovite powder weight percent, and gamma-(2,3-epoxy Propoxy)propyltrimethoxysilane is added to the diluent solution prepared in step (2), and fully stirred to make it hydrolyzed completely.
[0044] (4)...
Embodiment 2
[0057] The present invention adopts a kind of γ-(2,3-glycidoxy) propyltrimethoxysilane coupling agent and aluminate coupling agent composite modified microcrystalline muscovite (600 mesh) process, which The ratio and consumption of raw materials, diluent, coupling agent species, and preparation method are similar to the patent embodiment 1, but the modified microcrystalline muscovite powder is 600 mesh, γ-(2,3-epoxypropoxy ) The amount of propyltrimethoxysilane is 1.2% of the weight percentage of microcrystalline muscovite, and the amount of aluminate is 1.0% of the weight percentage of microcrystalline muscovite. The viscosity and turbidity test data of the prepared modified microcrystalline muscovite product (600 mesh) are shown in Table 2.
[0058] Table 2 Viscosity and turbidity of 600 mesh microcrystalline muscovite powder / white oil system modified by different coupling agents
[0059] Modified Microcrystalline Muscovite
type
Amount of coupling agent ...
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Abstract
The invention relates to a technical method for complexly modifying micro-crystal muscovite powder by adopting a gamma-(2, 3-epoxy propoxy) propyl trimethoxy silicane coupling agent and an aluminate coupling agent. The method of the invention takes the micro-crystal muscovite powder as raw material, and the gamma-(2, 3-epoxy propoxy) propyl trimethoxy silicane coupling agent and the aluminate coupling agent as modifiers, and utilizes a mechanochemical modification method to complexly modify the micro-crystal muscovite powder by the mutual winding and crosslinking functions of the gamma-(2, 3-epoxy propoxy) propyl trimethoxy silicane coupling agent and the aluminate coupling agent. Compared with the micro-crystal muscovite powder modified by the single gamma-(2, 3-epoxy propoxy) propyl trimethoxy silicane coupling agent or the single aluminate coupling agent, the modified micro-crystal muscovite powder complexly has obviously improved compatibility with organic polymers, processing flow property and decentrality. Meanwhile, the infrared absorption spectroscopy of the modified micro-crystal muscovite products shows that the gamma-(2, 3-epoxy propoxy) propyl trimethoxy silicane coupling agent and the aluminate coupling agent are coated on the surface of the micro-crystal muscovite powder and carry out coupling activation with the micro-crystal muscovite powder materials in a certain way.
Description
1. Technical field [0001] The invention relates to a process method for compositely modifying microcrystalline muscovite powder by using an epoxy silane coupling agent and an aluminate coupling agent. Using microcrystalline muscovite as a raw material, epoxy silane and aluminate as modifiers, and using a mechanochemical modification method to prepare high-quality microcrystalline muscovite active fillers belongs to the field of mineral materials. The modified microcrystalline muscovite product prepared by the invention is suitable for medium and high-grade fillers of composite materials such as rubber, plastics, coatings, adhesives, etc., so that the comprehensive performance of the composite material is significantly improved. 2. Technical Background [0002] Muscovite, also known as potassium mica, is the most widely distributed mineral in the mica group, and its crystal chemical formula is KAl 2 [AlSi 3 o 10 ][OH] 2 , where the weight percent of each composition is Si...
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