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Novel pipeline anti-scratch polyurethane coating and preparation method thereof

A polyurethane coating and pipeline technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor impact resistance, adhesion, etc., rusted steel plates, and can not meet the requirements of anti-scratch coatings for pipelines, and achieve salt spray resistance. Good performance, excellent wear resistance, and the effect of ensuring stability over time

Active Publication Date: 2016-06-15
NIPPON PAINT TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coil coatings in the prior art, such as anti-scratch coatings for rolling shutter doors and windows, coatings for door and window frames, etc., have good wear resistance and friction resistance, but poor impact resistance and adhesion, which can easily cause steel plates to rust, and cannot meet the requirements of pipelines. Scratch Resistant Coating Requirements

Method used

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  • Novel pipeline anti-scratch polyurethane coating and preparation method thereof
  • Novel pipeline anti-scratch polyurethane coating and preparation method thereof
  • Novel pipeline anti-scratch polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A preparation method of a novel pipeline anti-scratch polyurethane coating, comprising the following steps:

[0061] 1) Mix 25-30 parts of polyester resin, 1-3 parts of dispersant, 20-35 parts of coloring pigment, and 0.1-1 part of anti-sedimentation additive, add 4-10 parts of solvent, and grind to obtain slurry;

[0062] 2) Add 15-20 parts of polyester resin and 8-13 parts of amino resin to the slurry, mix; add 10-20 parts of isocyanate, add 0.2-1.5 parts of wax additive, 0.2-0.3 parts of acid catalyst, organic tin 1 to 2 parts of catalyst, 0.5 to 1.5 parts of defoamer, 1 to 3 parts of sand flour (polymethyl methacrylate, commercially available, such as Dongguan Longhai Chemical Co., Ltd., model 3678), to obtain a new pipeline anti-scratch Polyurethane coating.

[0063] The solid percentage of polyester resin is 60-70%, the solid percentage of amino resin is 70-100%, the solid percentage of isocyanate is 70-90%; the ratio of polyester amino group is 2-5, and the rati...

Embodiment 2

[0069] A preparation method of a novel pipeline anti-scratch polyurethane coating, comprising the following steps:

[0070] 1) Mix and grind 25 parts of polyester resin, 2 parts of dispersant, 22 parts of coloring pigment, 0.1-1 part of anti-sedimentation aid, and 4-10 parts of solvent to obtain slurry;

[0071] 2) Add 15 parts of polyester resin, 12 parts of amino resin, 18 parts of isocyanate, 0.2 parts of wax additive, 1.5 parts of sand flour, 0.2-0.3 parts of acid catalyst, 1-2 parts of organotin catalyst, disinfectant 0.5 to 1.5 parts of foaming agent and 0 to 5 parts of solvent are mixed to obtain a novel anti-scratch polyurethane coating for pipelines; wherein, the sand flour is polymethyl methacrylate, the particle diameter of the sand flour is 40 μm, and the specific gravity is 1.7 g / ml.

[0072] The polyester resin solid content is 60%, the amino resin solid content is 70%, and the isocyanate solid content is 70%; the polyester amino ratio is 2.9, the polyester iso...

Embodiment 3

[0075] A preparation method of a novel pipeline anti-scratch polyurethane coating, comprising the following steps:

[0076] 1) Mix and grind 30 parts of polyester resin, 2 parts of dispersant, 35 parts of coloring pigment, 0.1-1 part of anti-sedimentation aid, and 4-10 parts of solvent to obtain slurry;

[0077] 2) Add 20 parts of polyester resin, 10 parts of amino resin, 12 parts of isocyanate, 0.2 parts of wax additives, 1.5 parts of sand flour (polymethyl methacrylate, the particle size of sand flour is 30 μm, and the specific gravity is 1.5g / ml), 0.2-0.3 parts of acid catalyst, 1-2 parts of organic tin catalyst, 0.5-1.5 parts of defoamer, 0-5 parts of solvent, and mix to obtain a new type of anti-scratch polyurethane coating for pipes;

[0078] The polyester resin solid content is 60%, the amino resin solid content is 70%, and the isocyanate solid content is 70%; the polyester amino ratio is 4.3, the polyester isocyanate ratio is 3.6, the pigment-base ratio is 0.8, and the...

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Abstract

The invention discloses a novel pipeline anti-scratch polyurethane coating which includes sand flour selected from polyethylene, polytetrafluoroethylene, polypropylene, polymethacrylate, nylon 6, nylon 12 or polymethyl methacrylate. The sand flour is 30-50 [mu]m in granular size and is 1.5-1.8 g / ml in density. The coating is free of peeling off even at 0T in T-bend, is more than 100 times in MEK rubbing resistance, has no abnormity in salt fog after 1500 h, is good in anti-aging property, is 1500 h in QUVA and is not less than 70% in gloss retention, and is free of granule falling off during a pipeline pressing process. The invention also discloses a preparation method of the coating. The novel pipeline anti-scratch polyurethane coating is 200 DEG C in lowest film forming temperature. By means of the sand flour, under the same conditions, the glossiness of the coating is lower by 10 degrees than a coating without the sand flour.

Description

technical field [0001] The invention relates to the technical field of polyester coatings. More specifically, it relates to a novel anti-scratch polyurethane coating for pipelines and a preparation method thereof. Background technique [0002] In a cold environment (low temperature condition), plastic pipes are easy to break; in a hot environment (high temperature condition), plastic pipes are prone to aging, which limits the application of plastic pipes in industry. Therefore, color plate metal pipes with cheap price, strong acid and alkali resistance, wear resistance and scratch resistance are becoming more and more popular. According to incomplete statistics, the annual consumption of coatings on metal pipes in Russia exceeds 10,000 tons. [0003] Coil coatings include coil steel coatings and coil aluminum coatings. They are special coatings that are applied to metal plates to protect and decorate them. They are applied to steel plates and aluminum by roller coating. s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D7/12C08G18/42C08G18/54
Inventor 黄雨花于东澳
Owner NIPPON PAINT TIANJIN
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