Fluorine-containing organosilicon polymer modified epoxy resin daub and preparation method thereof

A technology of epoxy resin mastic and fluorosilicon polymer, which is applied in the field of building materials, can solve the problems of insufficient toughness of epoxy resin mastic, poor anti-corrosion and stain resistance, high linear expansion coefficient, etc., and achieve good stress dispersion and steric hindrance. Small size, good chain flexibility

CN113443858AActive Publication Date: 2021-09-28JIANGSU SOBUTE NEW MATERIALS +3
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-09-28

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Abstract

The invention belongs to the technical field of building materials, and particularly discloses fluorine-containing organosilicon polymer modified epoxy resin daub and a preparation method thereof. The epoxy fluorosilicone polymer is grafted to T8 amino POSS or T6 amino POSS to form a multi-arm structure, and the multi-arm structure can play a good stress dispersion role in an epoxy resin three-dimensional cross-linked network structure formed during application, so that the impact toughness and the deformability of the fluorine-containing organosilicon polymer modified epoxy resin daub are improved; meanwhile, the fluorine-containing fluorosilicone polymer is grafted with POSS to modify the epoxy resin, so that the epoxy resin daub has better tensile strength, elongation at break, compression strength and impact strength. The fluorine-containing organosilicon polymer modified epoxy resin daub has an obvious hydrophobic effect on the surface, better water repellency and lower water absorption, so that the medium corrosion resistance of the material is enhanced, and the durability of the epoxy resin cement material in concrete protection and corrosion prevention application is improved.
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Description

technical field

[0001] The invention belongs to the technical field of building materials, and specifically relates to a fluorine-containing organosilicon polymer modified epoxy resin mastic and a preparation method thereof. Background technique

[0002] Due to the advantages of high hardness and good adhesion, epoxy resin cement is widely used in the repair of concrete building defects, but it also has poor toughness, high water absorption, poor corrosion resistance, and poor deformation ability. It is prone to many problems such as cracking, peeling, peeling, etc., resulting in reduced protection durability. These defects limit its further application in the repair and protection of concrete defects that require high durability such as anti-corrosion and stain resistance.

[0003] For example, the Chinese invention patent of an epoxy mastic and its preparation method (CN 201510668642.3) discloses a kind of epoxy resin mastic, which includes component A and component B, wit...

Examples

preparation example Construction

[0045] The preparation method of this fluorine-containing organosilicon polymer modified epoxy resin mastic comprises the following steps:

[0046] Prepare A component according to the following steps: (1) Pre-react epoxy-based fluorosilicon polymer and amino POSS in toluene solution at 90±5°C for 10h-24h, and then vacuum remove it at 80°C-100°C Toluene solvent to obtain viscous fluorosilicon polymer grafted POSS.

[0047] (2) Mix epoxy resin, diluent, fluorosilicon polymer grafted POSS, and thixotropic agent according to a predetermined mass ratio, and use a planetary mixer with a vacuum system for high-speed dispersion, and the dispersion speed is 800r / min~2000r / min, the dispersion temperature is controlled at 20°C to 50°C, and the dispersion time is 30min to 60min to obtain a resin premix.

[0048] (3) Add the predetermined mass fraction of quartz powder into the resin premix prepared in step (2), heat the material to 40°C~60°C, and turn on the vacuum system to carry out ...