Preparation method of salt-spray-resistant modified polyaspartic acid ester, salt-spray-resistant modified polyaspartic acid ester and coating

An aspartic acid ester and salt spray-resistant technology, which is applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of shortening the construction time of products, small steric hindrance of amino groups, and poor storage stability, etc. problem, to achieve the effect of long construction operation time, low viscosity and long curing time

Pending Publication Date: 2022-07-22
SHENZHEN FEIYANG JUNYAN TECH DEV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But, there are following three problems in the method for epoxy modification: 1, utilize bisphenol A type epoxy resin, bisphenol F type epoxy resin, hydrogenated bisphenol A type epoxy resin, novolak type epoxy resin modification Polyaspartic acid ester, the steric hindrance of the amino group on the graft is small and has no inductive effect, the reaction speed of the modified polyaspartic acid ester resin and isocyanate is very fast, even if only 10% is added in use The modified polyaspartic ester resin into the...

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
  • Preparation method of salt-spray-resistant modified polyaspartic acid ester, salt-spray-resistant modified polyaspartic acid ester and coating
  • Preparation method of salt-spray-resistant modified polyaspartic acid ester, salt-spray-resistant modified polyaspartic acid ester and coating
  • Preparation method of salt-spray-resistant modified polyaspartic acid ester, salt-spray-resistant modified polyaspartic acid ester and coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Take a 1L four-neck glass flask, add 210g (1mol) of 4,4'-diaminodicyclohexylmethane, and under the protection of nitrogen, add diethyl maleate 258 (1.5mol) dropwise, and the dropwise addition is completed in 3 hours, wherein , the double bond equivalent in diethyl maleate: the amine group equivalent in 4,4'-diaminodicyclohexylmethane=0.75:1;

[0055] After the dropwise addition, react at 60°C for 6 hours, then add 185g (0.5mol) of NC-513 and heat up to 100°C, and react at 100°C for 6 hours to obtain salt spray-resistant modified polyaspartate;

[0056] The obtained salt spray-resistant modified polyaspartate had a secondary amine group equivalent of 326.5 and a viscosity of 4500 mPa·s (25° C.).

Embodiment 2

[0058] Take a 1L four-neck glass flask, add 238 g (1 mol) of 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane, and dropwise add 244.8 g (1.7 g of dimethyl maleate) under the protection of nitrogen. mol), the dropwise addition was completed in 4 hours, wherein, the double bond equivalent in dimethyl maleate: the amine group equivalent in 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane=0.85:1 ;

[0059] After the dropwise addition, the reaction was carried out at 80 °C for 24 hours, then 111 g (0.3 mol) of NC-513 was added, the temperature was raised to 90 °C, and the reaction was carried out at 90 °C for 5 hours to obtain a salt spray-resistant modified polyaspartic acid ester;

[0060] The obtained salt spray-resistant modified polyaspartate had a secondary amine group equivalent of 296.9 and a viscosity of 2500 mPa·s (25° C.).

Embodiment 3

[0062] Take a 1L four-neck glass flask, add 170 g (1 mol) of isophorone diamine, and under the protection of nitrogen, add 244.8 g (1.7 mol) of dimethyl maleate dropwise, and the dropwise addition is completed in 5 hours. Double bond equivalent in dimethyl ester: amine group equivalent in isophorone diamine=0.85:1;

[0063] After the dropwise addition, the reaction was carried out at 85 °C for 48 hours, then 63 g (0.15 mol) of NC-514 was added and the temperature was raised to 90 °C, and the reaction was carried out at 90 °C for 6 hours to obtain a salt spray-resistant modified polyaspartic acid ester;

[0064] The obtained salt spray-resistant modified polyaspartate had a secondary amine group equivalent of 312.3 and a viscosity of 4200 mPa·s (25° C.).

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

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of polyaspartic acid ester, and particularly discloses a preparation method of salt-spray-resistant modified polyaspartic acid ester, the salt-spray-resistant modified polyaspartic acid ester and a coating. The preparation method comprises the following steps: dropwise adding maleate or fumarate into aliphatic amine or alicyclic amine, and reacting to obtain polyaspartic acid ester to be modified; the molar ratio of the maleate or fumarate to the aliphatic amine or alicyclic amine is (0.75-0.95): 1 according to the ratio of double bond equivalent in the maleate or fumarate to amino equivalent in the aliphatic amine or alicyclic amine; adding the cardanol modified epoxy resin into the to-be-modified polyaspartic acid ester to react to obtain the salt spray resistant modified polyaspartic acid ester, wherein the molar ratio of the cardanol modified epoxy resin to the to-be-modified polyaspartic acid ester is (0.05-0.5): 1. The modified polyaspartic acid ester prepared by the method has excellent salt spray resistance and water resistance, and is low in viscosity and long in operable time during construction.

Description

technical field [0001] The present application relates to the field of polyaspartic acid esters, in particular to a preparation method of salt spray-resistant modified polyaspartic acid ester, salt spray-resistant modified polyaspartic acid ester and coatings. Background technique [0002] Polyaspartate is obtained by Michael reaction of aliphatic or alicyclic diamine or polyamine with maleate or fumarate. Due to the steric hindrance and inductive effect of maleate or fumarate, the reaction speed of polyaspartate and isocyanate is slower than that of conventional amino resins, which can provide longer construction time, and its coatings The construction methods can be spraying, rolling, scraping, etc., no need for professional and expensive construction equipment, and the application is simple. In addition, the reactivity of the secondary amine group in polyaspartic acid ester is higher than that of the hydroxyl group of conventional polyurethane resin, the reaction speed i...

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
IPC IPC(8): C08G18/32C09D175/02C09D5/08
CPCC08G18/329C09D175/02C09D5/08
Inventor 吕文章赵粕利蔡水生邱小勇朱龙晖何飞云谢夏陆
Owner SHENZHEN FEIYANG JUNYAN TECH DEV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap