Aqueous primer for fiber-reinforced epoxy resin composites and preparation method thereof
A technology of epoxy resin and composite materials, applied in primers, polyurea/polyurethane coatings, coatings, etc., can solve problems such as easy sagging and poor thixotropy of primers, and achieve good wettability and strong adhesion , High thixotropic effect
Active Publication Date: 2020-09-01
GUANGDONG YATU CHEM
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
This water-based primer has good wettability and strong adhesion to epoxy / carbon fiber composite materials. Unfortunately, the primer has poor thixotropy and is easy to sag when one-time thick coating
Method used
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Experimental program
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Effect test
Embodiment 1～6
[0031] The preparation method of embodiment 1~6 water-based primer is as follows:
[0032] S1. Take the deionized water, dispersant, defoamer and pH value regulator in the formula, add it into the dispersion tank and disperse evenly, then slowly add titanium dioxide, talcum powder, barium sulfate and conductive carbon black, at 800rpm Pre-disperse for 30 minutes, then use a sand mill to grind the pre-dispersed mixture to below 15 μm to obtain a color paste;
[0033] S2. Take the water-based polyurethane dispersion, leveling agent, film-forming aid and co-solvent of the formula and add it to the paint mixing tank to disperse evenly, then add the color paste, disperse at 700rpm for 15min, and then add alkali swelling thickener Adjust viscosity and rheology with non-ionic associative thickener, and filter to obtain water-based primer for fiber-reinforced epoxy resin composites.
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Abstract
The invention belongs to the technical field of coatings, and in particular relates to a waterborne primer for a fiber reinforced epoxy resin composite material and a preparation method thereof. The waterborne primer of the invention is composed of a waterborne polyurethane dispersion, a leveling agent, a dispersing agent BYK-190, an antifoaming agent, a pH regulator, a coalescing agent, a cosolvent, titanium dioxide, talcum powder, barium sulfate, conductive carbon black, a nonionic associative thickener, an alkali swellable thickener and deionized water. The waterborne primer of the invention has good wettability and strong adhesion to the fiber-reinforced epoxy resin composite material and can be thickly applied on the surface of a workpiece with a complicated shape without sagging; andthe formed paint film has a flat surface state and has good water resistance and rubbing property.
Description
technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based primer for fiber-reinforced epoxy resin composite materials and a preparation method thereof. Background technique [0002] Composite material is a new type of engineering material developed in recent decades. It has the advantages of high specific strength, high specific stiffness and low relative density, especially glass fiber composite materials and carbon fiber composite materials based on epoxy resin. It is widely used in motorcycle helmets, aircraft shells, wind turbine blades and other fields. [0003] However, in nature, composite materials will be affected by factors such as humid gas in the air, salt spray, rain, and sunlight, which will cause them to age, so that their appearance and mechanical properties will deteriorate. Therefore, it is very important to apply coatings on the surface of composite materials. However, fiber-reinforced epo...
Claims
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IPC IPC(8): C09D175/04C09D5/00C09D7/20C09D7/44
CPCC09D5/002C09D7/20C09D7/44C09D175/04
Inventor 赵立英刘冬立陈忠陈容爱冯兆均
Owner GUANGDONG YATU CHEM