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Nanometer modified composite polyurethane marine finishing coating and preparation method thereof

A composite polyurethane and nano-modification technology, which is applied in polyurea/polyurethane coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems of poor impact resistance, poor anti-corrosion performance, and easy brittle shedding, etc., and achieve improvement The effect of impact strength

Inactive Publication Date: 2019-06-21
JIANGSU MARITIME INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the existing marine protective paints have poor anti-corrosion performance, poor adhesion, and are prone to brittle peeling off during long-term use. defect

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be described in detail below.

[0019] The invention discloses a nano-modified composite polyurethane marine topcoat, which comprises 140-160 parts of polyurethane prepolymer, 10-20 parts of organic silicon mixture, 12-18 parts of epoxy resin, 1-5 parts of nano oxide, 15~25 parts of organic additives.

[0020] The principle of the present invention is: firstly, utilize the main chain skeleton of Si-O-Si formed by organosilicon, the side group of Si atom reacts with polyurethane prepolymer to generate Si-O-C bond block-graft copolymer, and then combine ring Oxygen resin, so that it forms an interpenetrating network structure with silicone-polyurethane copolymer, and is catalyzed by organic additives, so as to finally obtain the finished product.

[0021] The polyurethane prepolymer is obtained by the following method, preheating the polyether diol in a constant temperature water bath for at least 30 minutes to complete dehydration; adding the ...

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PUM

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Abstract

The invention particularly relates to a preparation method of nanometer modified composite polyurethane marine finishing coating. Most of the existing marine protective paints have the defects that the anticorrosive performance is poor, the adhesion is poor, brittle shedding is easily caused during long-term use, and especially under an impact force, and paint shedding is easily caused by poor impact strength. In order to solve the problems, the invention provides the nanometer modified composite polyurethane marine finishing coating. The nanometer modified composite polyurethane marine finishing coating comprises 140-160 parts of a polyurethane prepolymer, 10-20 parts of an organosilicone mixture, 12-18 parts of epoxy resin, 1-5 parts of nanometer oxide and 15-25 parts of an organic additive. The invention further provides the preparation method of the nanometer modified composite polyurethane marine finishing coating. A reaction between organosilicone and the polyurethane prepolymeris optimally utilized, formation of a staggered network structure through combination with the epoxy resin is facilitated, and nanometer oxide modification and a catalytic reaction of the organic additive are utilized, so that the impact strength, the adhesion and the corrosion resistance of the coating are improved.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a preparation method of a nano-modified composite polyurethane ship topcoat. Background technique [0002] In harsh corrosive environments such as marine environment, acid rain atmosphere, industrial atmosphere and humid oxygen-rich mine environment, the best anti-corrosion coating solution for steel structures is to use arc spraying zinc, aluminum and their alloy coatings plus a closed composite coating , can obtain a long and effective anti-corrosion life. The sealing agent painted on the surface of the sprayed coating can penetrate into the pores of the metal coating well and be anchored on its surface. The bonding effect of the sealing agent on the surface of the metal sprayed coating is better than that on the surface of the sandblasting substrate. Moreover, the consumption rate of the sealed metal sprayed coating in the corrosive environment is obviously sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D163/00C09D7/61C09D7/63C09D5/08
Inventor 朱征宇
Owner JIANGSU MARITIME INST