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A kind of wet solidified anticorrosion coating of polyurethane epoxy coal tar

A technology of epoxy coal tar pitch and anti-corrosion coating, which is applied in polyurea/polyurethane coatings, anti-corrosion coatings, asphalt coatings, etc., and can solve the problems of short service life of coatings, low concentration of acid and alkali resistance, laborious coating and rust removal, etc. , to achieve the effect of no decline in technical indicators, good application performance, and cost reduction

Inactive Publication Date: 2008-10-01
孙锡宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are many anti-corrosion coatings used in buried and overhead steel pipelines of gas, gas, water supply and drainage at home and abroad. The process of coating and derusting is very laborious, and the coating cost is high. Poor performance, short service life after coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A moisture-curing polyurethane epoxy coal tar pitch anti-corrosion coating, which is uniformly coated with a moisture-curing polyurethane epoxy coal tar pitch anti-corrosion coating on the outside of the steel pipe. The moisture-curing polyurethane epoxy coal tar pitch anti-corrosion coating consists of two components A and B It is formed by mixing 1:1 by weight, wherein the preparation process of the two components A and B is as follows,

[0017] The preparation of A component, in parts by weight,

[0018] Get 15.5 parts of polymethylene polyphenylisocyanate PAPI300#, 4.8 parts of polyether 3030, 1.13 parts of polyether 635, 3.51 parts of dioctyl ester, 1.45 parts of epoxy resin, 3.1 parts of 800 mesh mica powder, 6.55 parts of 800 mesh quartz powder 0.0048 parts of phosphoric acid, 9.06 parts of solvent S1000#, react in the reactor at 81°C for 30 minutes, azeotropically dehydrate at 120°C for 45 minutes, then keep at 80°C for 2 hours, cool to 40°C for inspection, filt...

Embodiment 2

[0022] A moisture-curing polyurethane epoxy coal tar pitch anti-corrosion coating, which is uniformly coated with a moisture-curing polyurethane epoxy coal tar pitch anti-corrosion coating on the outside of the steel pipe. The moisture-curing polyurethane epoxy coal tar pitch anti-corrosion coating consists of two components A and B It is formed by mixing 1:1 by weight, wherein the preparation process of the two components A and B is as follows,

[0023] The preparation of A component, in parts by weight,

[0024] Get 18.1 parts of polymethylene polyphenylisocyanate PAPI400#, 5.45 parts of polyether 330, 1.33 parts of polyether 450, 3.69 parts of dibutyl ester, 1.67 parts of E-44 epoxy resin, 4.25 parts of 800 mesh mica powder, 800 mesh 8.25 parts of quartz powder, 0.0059 parts of phosphoric acid, 9.6 parts of industrial xylene, reacted in the reactor at 85°C for 40 minutes, azeotropically dehydrated at 140°C for 1 hour, then kept at 85°C for 1.5 hours, cooled to room temperat...

Embodiment 3

[0028] Different from Example 1, when the two-components A and B are prepared for use, the two-components A and B are mixed on site in a weight ratio of 1:1, stirred evenly, and settled for 5 minutes, sprayed on the outside of the steel pipe, coated with The thickness of the layer is specially reinforced <400-500μm.

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PUM

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Abstract

A wet-solidified anticorrosion paint for the steel pipeline used for delivering gas or water is composed of components A and B. Said component A contains polymethylenepolyphenol ester of isohydracid, polyether 3030 or 330, polyether 635 or 450, dioctylester or dibutylester, epoxy resin, mica powder, quartz powder and phosphoric acid. Said component B contains medium-temp tar asphalt, petroleum asphalt No.4 or 5, cyclodexanone, toluene, solvent S1000 or industrial xylene, mica powder and quartz powder.

Description

technical field [0001] The invention relates to a coating used for the outer anticorrosion layer of buried and overhead steel pipelines for fuel gas, coal gas, water supply and drainage, in particular to a moisture-cured polyurethane epoxy coal tar pitch anticorrosion coating. Background technique [0002] At present, there are many anti-corrosion coatings used in buried and overhead steel pipelines of gas, gas, water supply and drainage at home and abroad. The process of coating and rust removal is very laborious, and the coating cost is high. Poor performance, short service life after coating. Contents of the invention [0003] The object of the present invention is to provide a moisture-cured polyurethane epoxy coal tar pitch anticorrosion coating with low cost and good performance. [0004] To achieve the above object, the technical solution adopted in the present invention is: [0005] A moisture-curing polyurethane epoxy coal tar pitch anti-corrosion coating, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D195/00C09D5/08B05D7/22
Inventor 孙锡宁
Owner 孙锡宁