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Chromium-free high-solid-content polyurethane modified epoxy primer

A polyurethane modification, high solid content technology, applied in the field of functional coatings for aviation and functional coatings, can solve the problems of difficult to achieve low film thickness, high corrosion resistance, anti-impact performance, poor anti-impact performance, and poor anti-impact performance. , to achieve the effect of long-term protective construction performance, high environmental resistance, and reduced material weight

Active Publication Date: 2021-01-05
MARINE CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of existing epoxy resin system coatings are high brittleness and poor anti-impact performance, and it is difficult to achieve the coordination and unity between low film thickness, high corrosion resistance and excellent anti-impact performance, especially for high-speed aircraft. It is said that the impact force at the nose position is much greater than that at other positions, and poor anti-impact performance will be a huge safety hazard during aircraft flight.

Method used

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  • Chromium-free high-solid-content polyurethane modified epoxy primer
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  • Chromium-free high-solid-content polyurethane modified epoxy primer

Examples

Experimental program
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Effect test

Embodiment 1

[0045] 1. A chromium-free high solid content polyurethane modified epoxy primer is composed of three components A, B and C, and the mass ratio of the raw materials of each component is as follows:

[0046] (1) According to the weight ratio of component A: 27 parts of polyurethane modified epoxy resin, 15 parts of environmentally friendly antirust pigment, 14 parts of coloring pigment, 0.1 part of defoamer, 1 part of wetting and dispersing agent, and 6 parts of functional filler 0.05 parts of antioxidant, 0.1 part of UV absorber, 3 parts of ester solvent, 4 parts of ketone solvent, 29.75 parts of matting paste.

[0047] (2) According to the weight ratio of component B: 76 parts of polyamide curing agent, 14 parts of modified amine curing agent, 4 parts of epoxy curing accelerator, and 6 parts of tert-butyl acetate.

[0048] (3) According to the weight ratio of component C: 10 parts of isopropanol, 15 parts of tert-butyl acetate, 15 parts of isobutyl isobutyrate, 35 parts of n-b...

Embodiment 2

[0058] 1. A chromium-free high solid content polyurethane modified epoxy primer is composed of three components A, B and C, and the mass ratio of the raw materials of each component is as follows:

[0059] (1) According to the weight ratio of component A: 26 parts of polyurethane modified epoxy resin, 15 parts of environmentally friendly antirust pigment, 14 parts of coloring pigment, 0.05 part of defoamer, 1 part of wetting and dispersing agent, and 8 parts of functional filler 0.05 parts of antioxidant, 0.1 part of UV absorber, 3 parts of ester solvent, 4 parts of ketone solvent, 28.8 parts of matting paste.

[0060] (2) According to the weight ratio of component B: 75 parts of polyamide curing agent, 15 parts of modified amine curing agent, 4 parts of epoxy curing accelerator, and 6 parts of tert-butyl acetate.

[0061] (3) According to the weight ratio of component C: 10 parts of isopropanol, 15 parts of tert-butyl acetate, 15 parts of isobutyl isobutyrate, 35 parts of n-b...

Embodiment 3

[0066] 1. A chromium-free high solid content polyurethane modified epoxy primer is composed of three components A, B and C, and the mass ratio of the raw materials of each component is as follows:

[0067] (1) According to the weight ratio of component A: 25 parts of polyurethane modified epoxy resin, 14 parts of environmentally friendly antirust pigment, 14 parts of coloring pigment, 0.05 part of defoamer, 1 part of wetting and dispersing agent, and 8 parts of functional filler 0.05 parts of antioxidant, 0.1 part of UV absorber, 3 parts of ester solvent, 4 parts of ketone solvent, and 30.8 parts of matting paste.

[0068] (2) According to the weight ratio of component B: 75 parts of polyamide curing agent, 14 parts of modified amine curing agent, 5 parts of epoxy curing accelerator, and 6 parts of tert-butyl acetate.

[0069] (3) According to the weight ratio of component C: 10 parts of isopropanol, 15 parts of tert-butyl acetate, 15 parts of isobutyl isobutyrate, 35 parts of...

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Abstract

The invention provides a chromium-free high-solid-content polyurethane modified epoxy primer, which is composed of a component A, a component B and a component C. The component B is a curing agent andcomprises the following components in parts by weight: 70-80 parts of a polyamide curing agent, 10-20 parts of a modified amine curing agent and 3-8 parts of an epoxy curing agent accelerator. The component C comprises 2-6 parts by weight of a coupling agent; wherein the component A is prepared from the following components in parts by weight: 20-30 parts of polyurethane modified epoxy resin, 28-35 parts of extinction slurry, 5-10 parts of filler, 20-32 parts of pigment, 1-3 parts of additive and 5-11 parts of solvent. The polyurethane modified epoxy primer provided by the invention has excellent adhesion and flexibility, and has good mechanical properties, environmental resistance and high corrosion resistance under a low film thickness (15-20[mu] m). The invention also provides a preparation method of the epoxy primer.

Description

technical field [0001] The invention relates to the field of functional coatings, in particular to the field of functional coatings for aviation, and more specifically relates to a chrome-free high solid content polyurethane modified epoxy primer. Background technique [0002] At present, high-solid and water-based epoxy anti-corrosion primers widely used in foreign advanced aircraft have the characteristics of long life, high coating quality and high environmental protection, representing the development direction of future aviation coatings. Coating materials used in various types of domestic aircraft are still commonly used in traditional solvent-based high-VOC content coatings and coating systems containing chromate coatings; Poor flexibility, short service life, high repair frequency, etc., urgently need a domestic substitute. Therefore, it is an inevitable trend in the development of aircraft coatings to develop a kind of efficient, green and environmentally friendly ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D163/00C09D5/08C09D7/61
CPCC09D175/08C09D163/00C09D5/084C09D7/61C09D7/70C08K2003/2255C08K2003/328C08K2003/327C08K2003/3045C08L2205/025C08L2205/035C08L63/00C08K13/06C08K3/22C08K3/32C08K3/34C08K3/30C08K7/22C08K3/346C08L75/08
Inventor 郭年华步明升汪威王黎薛玉华阮润琦张岩张彪
Owner MARINE CHEM RES INST