Method for preparing isocyanate cross-linking agent prepolymer

A technology of isocyanate and cross-linking agent, which is applied in the field of preparation of cross-linking agent for cathodic electrophoretic coatings, can solve the problems of poor corrosion resistance, poor abrasion resistance, weak adhesion, etc. Effect

Active Publication Date: 2013-02-13
ANHUI LINGYANG NEW MATERIAL CO LTD
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional electrophoretic coatings have defects such as poor wear resistance, weak adhesion, and poor corrosion resistance. We can introduce isocyanate crosslinking agent prepolymers into other resins, directly as film-forming materials, and can be cross-linked; or as Cross-linking curing agent or other additives for film-forming resins to improve the hardness, gloss, abrasion resistance, solvent resistance, corrosion resistance, adhesion and other properties of electrophoretic 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] (1) LY-1 production method

[0018] Add 131 parts of IPDI into the reaction kettle equipped with a stirrer, reflux condenser and thermometer, add 73 parts of methyl ethyl ketone oxime into the dropping tank, start stirring and raise the temperature at 45°C, start adding methyl ethyl ketone oxime dropwise, the dropping time is 200min, When dropping, the temperature is controlled at 50°C, and the dropping temperature should be strictly controlled, and avoid overheating. After the dropwise addition, keep stirring for 30 minutes. After confirming that the temperature does not increase, then raise the temperature to 70°C, and keep warm at 70±2°C for 120 minutes. , after the detection index meets the technical requirements, cool down to 40°C for standby;

[0019] (2) LY-2 production method

[0020] Add 26 parts of TDI into the reaction kettle equipped with a stirrer, reflux condenser and thermometer, and add 21 parts of imidazole in the dropping tank. Start stirring and rai...

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 method for preparing an isocyanate cross-linking agent prepolymer and belongs to the technical field of preparation methods for cross-linking agents for cathode electrophoretic coatings. The isocyanate cross-linking agent prepolymer can stably coexist with multiple kinds of waterborne resin for a long time at normal temperature; during treatment, an isocyanate group released by the curing agent reacts with groups such as a hydroxyl group, a carboxyl group and an amino group on molecular chains of the waterborne resin to form a cross-linking structure, and the performance of the waterborne resin can be remarkably improved, so that the comprehensive performance of an electrophoretic coating is improved; and the isocyanate cross-linking agent prepolymer can be taken as a cross-linking agent for electrophoretic coatings, and can remarkably improve the properties of paint films of the coatings such as water resistance, chemical resistance, wear resistance, adhesion and mechanical properties through curing crosslinking.

Description

technical field [0001] The invention relates to a preparation method of an isocyanate crosslinking agent prepolymer, and belongs to the technical field of preparation methods of a crosslinking agent for cathodic electrophoretic coatings. Background technique [0002] Electrophoretic coatings have been widely favored by people for a long time because of their unique advantages such as water-based, less pollution, convenient coating and high corrosion resistance of the coating film. Applications. However, traditional electrophoretic coatings have defects such as poor wear resistance, weak adhesion, and poor corrosion resistance. We can introduce isocyanate crosslinking agent prepolymers into other resins, directly as film-forming materials, and can be cross-linked; or as Cross-linking curing agent or other additives for film-forming resins to improve the hardness, gloss, abrasion resistance, solvent resistance, corrosion resistance, adhesion and other properties of electropho...

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): C08G18/76C08G18/75C08G18/48C08G18/58C09D5/44C09D163/00C09D7/12
Inventor 刘玉陈小琴林秀龙
Owner ANHUI LINGYANG NEW MATERIAL CO LTD
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