Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Water dispersive polyisocyanate curing agent and preparation method thereof

A polyisocyanate and curing agent technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of small grafting amount, limited improvement of anti-corrosion performance, and influence on the popularization and application of water-based anti-corrosion coatings , to achieve the effect of improving the anti-corrosion performance

Inactive Publication Date: 2009-04-29
CHINA NAT OFFSHORE OIL CORP +2
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the grafting of epoxy resin or phosphate groups on hydroxyacrylate can improve the corrosion resistance to a certain extent, the amount of grafting is often very small due to the obvious impact on the stability of the emulsion when the amount of grafting is large. , so the degree of improvement to the anti-corrosion performance is limited, sometimes even not obvious
Thus affecting the popularization and application of water-based anti-corrosion coatings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water dispersive polyisocyanate curing agent and preparation method thereof
  • Water dispersive polyisocyanate curing agent and preparation method thereof
  • Water dispersive polyisocyanate curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0022] Examples 1 to 4 Preparation of water-dispersed polyisocyanate curing agent

[0023] (1) The formula is shown in Table 1 (the dosages are all parts by weight)

[0024] Table 1

[0025] Component

raw material name

Dosage

Example 1 Dosage

Example 2 Dosage

Example 3 Dosage

Example 4 Polyisocyanate

N75, solid content 70% by weight

N3390, solid content 90% by weight 142.86

/ 142.86

/ /

111.11 /

111.11 Hydroxy cyclic ether compound

α-Hydroxycyclobutyl ether

α-hydroxy, β-methyl cyclobutyl ether 5.0

/ 15.0

/ /

5.0 /

15.0 Cosolvent N-methylpyrrolidone 11.67 5.0 11.67 5.0

[0026] in FIG. 1:

[0027] N75 is the product brand of 1,6-hexamethylene diisocyanate dimer produced by Bayer;

[0028] N3390 is the product brand of 1,6-hexamethylene diisocyanate trimer produced by Bayer;

[0029] α-Hydroxycyclobutyl ether and α-hydroxyl, β-methylcyclobutyl ether are all commercially available products;

...

Embodiment 5

[0033] Example 5 Preparation of water-based two-component anti-corrosion coating A

[0034] (1) Preparation of slurry

[0035] Take 24 parts by weight of iron red; 15 parts by weight of zinc phosphate; 15 parts by weight of mica powder; 16 parts by weight of kaolin; 30 parts by weight of deionized water; and 0.7 parts by weight of water-soluble dispersant 270. Mix the above components uniformly, grind them to a fineness below 50 microns with a sand mill, and store them for later use;

[0036] (2) Preparation of paint

[0037] Component A: curing agent product A prepared in Example 1;

[0038] Component B: Mix the above slurry with hydroxy acrylate emulsion VPLS2227 / 1 at a weight ratio of 100:82, then add thickener Tego3000 (the addition is 0.6% of the total weight of the coating) and defoamer Tego902W ( The added amount is 0.2% of the total weight of the coating), and the mixture is evenly stirred to form the second component;

[0039] Before construction, mix component A and comp...

Embodiment 6

[0040] Example 6 Preparation of water-based two-component anti-corrosion coating B

[0041] (1) The preparation of the slurry is the same as in Example 5;

[0042] (2) Preparation of paint

[0043] Component A: curing agent product B prepared in Example 2;

[0044] Component B: Mix the above slurry with hydroxy acrylate emulsion VPLS2227 / 1 at a weight ratio of 100:70, then add thickener Tego3000 (the addition is 0.6% of the total weight of the coating) and defoamer Tego902W ( The added amount is 0.2% of the total weight of the coating), and the mixture is evenly stirred to form the second component;

[0045] Before construction, mix component A and component B at a weight ratio of 1:6.9, and stir evenly to obtain a water-based two-component anticorrosive coating B.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a water-dispersible polyisocyanate curing agent. The curing agent is the polyisocyanate which takes 2 to 30 weight portions of hydroxyl cyclic ether compound, 100 weight portions of polyisocyanate counted as solids and less than or equal to 30 weight portions of cosolvent as raw materials, is obtained through heating reaction and combined with the hydroxyl cyclic ether compound. The structural formula of the hydroxyl cyclic ether compound is as above, wherein R1, R2 and R3 are the alkyl of H, OH or C1 to C10 and one of the alkoxy of C1 to C10; the R1, the R2 and the R3 are the same or different; and at most two OH bases are provided. During preparation, the polyisocyanate is first added and subjected to vacuum-pumping at a temperature between 100 and 150 DEG C; after solvents in the polyisocyanate are removed, the cosolvent is added and the temperature is regulated to be between 60 and 90 DEG C; the hydroxyl cyclic ether compound is added between 1 and 3 hours; after heat is preserved for 3 to 6 hours, the materials are cooled and packaged so as to prepare the curing agent. When the curing agent is used for waterborne two-component anticorrosive coating, the anticorrosive property of a coating film is obviously improved.

Description

Technical field [0001] The invention relates to a water-dispersed polyisocyanate curing agent and a preparation method thereof, and is particularly suitable as a curing agent for water-based two-component anticorrosive coatings. Background technique [0002] In the field of anti-corrosion coatings, there are two categories: solvent-based anti-corrosion coatings and water-based anti-corrosion coatings. Among them, the development of solvent-based anti-corrosion coatings has been very mature, while water-based anti-corrosion coatings have only become a research hotspot in recent years. Performance, especially anti-corrosion performance, cannot be compared with solvent-based anti-corrosion coatings. However, as the world's environmental pollution has worsened and the situation of petroleum resources has become increasingly severe, the environmental protection regulations of various countries have been promulgated one after another, and the water-based coating has become imminent. In...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/30C09D175/04C09D5/08
Inventor 周铭张东阳张玉兴陈斌王红岩
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com