Preparation method and application of cardanol-based waterborne epoxy resin curing agent

A water-based epoxy resin, cardanol-based technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problems of increasing energy consumption and environmental protection pressure, and achieve the reduction of environmental protection pressure, good compatibility and good stability Effect

Inactive Publication Date: 2020-03-31
岳阳中展科技有限公司
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process ratio, the amine is relatively excessive, and an organic solvent is added during the reaction process. After the reactio

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 and application of cardanol-based waterborne epoxy resin curing agent
  • Preparation method and application of cardanol-based waterborne epoxy resin curing agent
  • Preparation method and application of cardanol-based waterborne epoxy resin curing agent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] This embodiment includes the following steps:

[0031] (1) Put 160g PPG4000 (polypropylene glycol 4000), 15.2g epoxy resin E51 (epoxy equivalent 190) into a 500mL glass reactor with reflux condenser and automatic temperature control, heat and melt, start stirring, and mix well , heat up to 100 ℃, and keep a constant temperature, put in 1 mL of boron trifluoride ether solution (46.5% by mass) within 3 hours, and then react at constant temperature for 1 hour, and then cool to 65 ℃ to obtain epoxy functional group emulsification agent;

[0032] (2) In a 1000mL glass reactor with reflux condenser and automatic temperature control, put 60g of ethylenediamine and 300g of cardanol into it, stir and mix evenly, heat up to 80°C, put in 31g of solid formaldehyde in multiple batches, and control The reaction temperature is not more than 90 ℃, and then the constant temperature reaction is performed for 2 hours, and after 1 hour of vacuum dehydration (by mass, t...

Example Embodiment

[0037] Example 2

[0038] This embodiment includes the following steps:

[0039] (1) Into the 500mL glass reactor with reflux condenser and automatic temperature control, put 128g PEG4000, and 12.2g E51 epoxy resin (epoxy equivalent 190), heat and melt, start stirring, mix well, heat up to 100 ℃, and maintain a constant temperature, put into 0.85 mL of boron trifluoride ether solution (46.5% by mass) within 3 hours, and then react at constant temperature for 1 hour. Then cooled to 65°C to obtain an epoxy functional emulsifier;

[0040] (2) In a 1000mL glass reaction kettle with a reflux condenser and automatic temperature control, put 100g of diethylenetriamine and 240g of cardanol respectively, stir and mix evenly, heat up to 80°C, and put in 30g of solid formaldehyde in multiple batches , control the reaction temperature not to exceed 90 ℃, then constant temperature reaction for 2 hours, after 1 hour of vacuum dehydration (by mass, the water content is lower than 2.5%), co...

Example Embodiment

[0042] Example 3

[0043] This embodiment includes the following steps:

[0044] (1) Put 128g PEG2000 and 28.2g E44 epoxy resin (epoxy equivalent 220) into a 500mL glass reactor with a reflux condenser and automatic temperature control respectively, heat and melt, start stirring, mix well, and heat up to 100°C , and maintain a constant temperature, put into 0.8 mL of boron trifluoride ether solution (46.5% by mass) within 3 hours, then react at constant temperature for 1 hour, and then cool to 65 ° C to obtain an epoxy functional group emulsifier;

[0045](2) In the 1000ml glass reaction kettle with reflux condenser and automatic temperature control, drop into 24g of ethylenediamine, 40g of diethylenetriamine, 240g of cardanol respectively, stir and mix well, heat up to 80°C, divide into batches 25g of solid formaldehyde was put into the second time, the reaction temperature was controlled not to exceed 90°C, the reaction was performed at a constant temperature for 2 hours, a...

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 discloses a preparation method and application of a cardanol-based waterborne epoxy resin curing agent. The preparation method comprises the following steps: (1) mixing an epoxy resin and a polyether polyol, heating for melting, adding a catalyst at 50-100 DEG C, and carrying out condensation reaction to obtain an epoxy functional group emulsifier after the reaction is finished; (2)carrying out Mannich reaction on cardanol, a polyamine and formaldehyde to obtain a cardanol modified curing agent; and (3) adding the epoxy functional group emulsifier obtained in the step (1) into the cardanol modified curing agent obtained in the step (2), heating to 60-80 DEG C, and reacting to obtain the cardanol-based waterborne epoxy resin curing agent. The cardanol-based waterborne epoxy resin curing agent prepared by the preparation method disclosed by the invention is insensitive to the pH value and good in stability; the process is simple, amine does not need to be excessive, no organic solvent is added, and energy conservation and environmental protection are achieved.

Description

technical field [0001] The invention belongs to the field of curing agents for water-based epoxy resins, and in particular relates to a preparation method and application of a cardanol-based water-based epoxy resin curing agent. Background technique [0002] Water-based epoxy coatings are one of the most important varieties of water-based industrial paints, widely used in floor coating materials, containers, ships, railways, building steel structures and other industrial fields that require extremely high wear resistance and corrosion resistance. [0003] The film-forming substance of waterborne epoxy coatings is composed of resin and curing agent, and the performance of curing agent plays an important role in the final performance of the coating film. The development of curing agents with different performance characteristics can promote the application of epoxy coatings in various industrial fields. [0004] At present, most of the water-based epoxy curing agents in the m...

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): C08G81/00C08G59/62C09D163/00
CPCC08G59/62C08G81/00C09D163/00
Inventor 刘慧森余志良孟勇
Owner 岳阳中展科技有限公司
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