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Silicone oil-treated pyrolysis silica as well as preparation method and application thereof

A technology of silica and pyrolysis, which is applied in the direction of thin material treatment, epoxy resin glue, adhesive type, etc., can solve the problems of insufficient improvement of the dispersion of polyetheramine curing agent, etc., and achieve the goal of being suitable for large Large-scale promotion and application, good thickening and thickening stability, and simple preparation

Inactive Publication Date: 2017-07-25
TOKUYAMA CHEM ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, even if the above-mentioned silicone oil-treated fumed silica prepared in the above-mentioned prior art is used, the effect of improving the dispersibility of the above-mentioned polyetheramine curing agent is not sufficient. properties, it is necessary to add a large amount of silicone oil when preparing silicone oil to treat fumed silica

Method used

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  • Silicone oil-treated pyrolysis silica as well as preparation method and application thereof
  • Silicone oil-treated pyrolysis silica as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0150]

[0151] A closed triple tube lamp head with a central tube inner diameter of 100 mm is set in a closed reactor, silicon tetrachloride (STC) and hydrogen as a raw material gas, and air as a combustion-supporting gas are mixed in advance, and the above-mentioned mixed gas is supplied to in the center tube. The first annular tube is supplied with hydrogen and air to form a pilot flame. Air circulates in the second annular tube to prevent silica particles from adhering to the lamp cap. A desired specific surface area can be obtained by adjusting the amount of raw material gas and combustion-supporting gas supplied to the central tube.

[0152]

[0153] In a stirrer with a capacity of 35 L, 400 g of the above-mentioned fumed silica was added, stirred, and heated to 260° C. while switching to a nitrogen atmosphere. Then, 80 g (20 parts by mass added to the amount of fumed silica added) of polydimethylsiloxane having a viscosity of 50 cSt as a silicone oil was sprayed. ...

Embodiment example 2～4

[0155] In Embodiment 1, the viscosity of the silicone oil used and the specific surface area of ​​fumed silica are changed as in Table 1, and the method is the same as in Embodiment 1. The physical properties of the prepared silica are shown in Table 1, and the content of metal impurities is shown in Table 2.

Embodiment example 5

[0157] The operation was the same as that of Embodiment 1 except that the substitution in the container of Embodiment 1 was replaced with an oxygen concentration of 15% by volume. The physical properties of the prepared silica are shown in Table 1, and the content of metal impurities is shown in Table 2.

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Abstract

The invention provides silicone oil-treated pyrolysis silica, which has the physical properties described in (A)-(C): (A) the hydrophobic degree is 68% by volume or above; (B) the silicone oil immobilization rate is 60-95% by mass; (C) 2-15 parts by mass of the silicone oil-treated pyrolysis silica is added into 100 parts by mass of a polyether amine compound, and the viscosity of an obtained composition, which stands for 1h at the temperature of 25 DEG C, reaches 4000mPa.s or above. Preferentially, silicone oil is stuck on the surface of the pyrolysis silica in an inert gas environment of 150-300 DEG C, and the silicone oil-treated pyrolysis silica is obtained by carrying out high-temperature treatment in an oxygen environment of 150-300 DEG C. The invention also provides a relevant preparation method and application of the silicone oil-treated pyrolysis silica. When being mixed with the polyether amine compound, the silicone oil-treated pyrolysis silica has good thickening property and thickening stability, and can be used in a polyether amine curing agent composition for epoxy resin; the silicone oil-treated pyrolysis silica is simple to prepare and low in cost, thus being suitable for large-scale popularization and application.

Description

technical field [0001] The present invention relates to the technical field of silicon dioxide, in particular to the technical field of fumed silicon dioxide, and specifically refers to a silicon oil-treated fumed silicon dioxide, its preparation method and application. Background technique [0002] Adhesives are widely used in electronic materials, construction materials, etc. Epoxy resin adhesives are the most common type of adhesives, and are generally used in conjunction with polyetheramine curing agents. From the perspective of construction, the adhesive needs to have good thickening and anti-sagging properties. Considering the operability when mixed with epoxy resin, the polyetheramine curing agent also needs to have the above-mentioned properties, so it is necessary to add a rheological agent to the polyetheramine curing agent. Silica is often used as a rheological agent, the most common of which is the silica produced by combustion decomposition, the so-called fume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/04C09J163/00C08G59/50
CPCC09J11/04C09J163/00C08G59/5026C08G59/504C08K3/36C08K2201/006C08K9/08C08K9/06C09C1/3081C01P2006/22C01P2006/12C01P2006/80C01P2006/10C01P2006/11C08G59/4085C08L63/00C09J11/06Y10T428/2995
Inventor 前原孝之周庆涛戴建璋
Owner TOKUYAMA CHEM ZHEJIANG