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Intermediate paint for fiber-reinforced epoxy resin composites and preparation method thereof

A technology of epoxy resin and composite materials, applied in the field of coatings, can solve the problems of coating film performance to be improved, complex formula, etc., and achieve the effects of avoiding uneven coating, good wet film leveling, and strong adhesion

Active Publication Date: 2020-08-14
GUANGDONG YATU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet film thickness of the water-based polyurethane mid-coat is more than 85 μm without sagging, so that it has better interlayer adhesion with the primer and topcoat, but the mid-coat contains a variety of resins, the formula is complex, and its coating film Performance can be improved

Method used

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  • Intermediate paint for fiber-reinforced epoxy resin composites and preparation method thereof
  • Intermediate paint for fiber-reinforced epoxy resin composites and preparation method thereof
  • Intermediate paint for fiber-reinforced epoxy resin composites and preparation method thereof

Examples

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Embodiment

[0027] Embodiment, the present invention are used for the intermediate coating paint of fiber reinforced epoxy resin composite material

[0028] As shown in Table 1 below, the weight ratio tables of 6 examples of paints in the present invention are listed.

[0029] Paint formula in table 1 embodiment of the present invention 1~6

[0030]

[0031]

[0032] The preparation method of painting in embodiment 1~6 is as follows:

[0033] 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;

[0034] S2. Take the modified polyurethane dispersion, leveling agent, film-forming aid and co-solvent in the formula amount and add it to the paint mixing tank to disperse eve...

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Abstract

The invention belongs to the technical field of coatings and particularly relates to an intermediate coat used for fiber-reinforced epoxy resin composite material and a preparation method thereof. Theintermediate coat consists of: a modified polyurethane dispersion body, a leveling agent, a dispersant BYK-190, a defoamer, a pH regulator, a film forming additive, a cosolvent, TiO2, talcum powder,BaSO4, conductive carbon black, conductive mica, a nonionic associated thickener, an alkali swelling thickener, and deionized water. The aqueous intermediate coat has good wetting property and strongadhesion force on aqueous undercoat, can coats the surface of a work piece in complex shape to a large thickness without sagging, wherein the formed coat film has a flat surface and has excellent filling property, water resistance and grinding property.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a 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. Fiber-reinforced epoxy resin composite su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/63
CPCC08K2003/2241C08K2003/3045C08K2201/014C09D7/61C09D7/63C09D175/04C08K13/02C08K3/34C08K3/22C08K3/30C08K3/04
Inventor 赵立英刘冬立陈忠陈容爱冯兆均
Owner GUANGDONG YATU CHEM