Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing urethane chain rod-type high durable end-group polyene-bond photocuring prepolymer

A light-curing prepolymer, high weather resistance technology, applied in the field of ultraviolet light-curing resin, can solve the problems of complex preparation method, low toughness of hyperbranched ultraviolet light-curing resin, difficult control of reaction process, etc., and achieves high reactivity and high hardness. , the effect of good flexibility

Inactive Publication Date: 2010-08-04
JIANGNAN UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to synergistically utilize the high reactivity of hyperbranched UV curable resin and the characteristics of good toughness and good adhesion of polyether polyurethane to solve the problems of low toughness, complicated preparation method and relatively difficult reaction process of hyperbranched UV curable resin at the present stage. The disadvantages that are difficult to control, improve the comprehensive performance of photocurable resin

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 1

[0018] 20 g of pyromellitic acid monohydroxypropyl ester was added in 5 batches. Add 50g of glycidyl methacrylate, 0.2g of 4-methoxyphenol, 0.36g of triethylamine, and reaction temperature of 80°C into the flask. Add pyromellitic acid monohydroxypropyl once every 30 minutes. Then increase the temperature to 90°C, and test the acid value of the system. If it reaches 3mgKOH / g, stop the reaction and record it as intermediate product B.

[0019] 50 g of hexamethylene diisocyanate was put into a four-necked flask, 50 g of water-removed polyether diol (molecular weight 400) and 0.25 g of dibutyltin dilaurate were added to the dropping funnel, and mixed. The dropping time is controlled at 90 minutes, and the reaction temperature is controlled at 60-70°C. When the molar amount of isocyanate groups in the system is 50% of the added molar amount of hexamethylene diisocyanate, the reaction is stopped.

[0020] The above-mentioned reaction intermediate product B containing three double bonds ...

Embodiment 2

[0022] 20 g of pyromellitic acid monohydroxypropyl ester was added in 5 batches. Add 50g of glycidyl methacrylate, 0.2g of 4-methoxyphenol, 0.36g of triethylamine, and reaction temperature of 80℃ in the flask. Add 4g of pyromellitic acid monohydroxypropyl at intervals, and add all of them. Then raise the temperature to 90°C, and test the acid value of the system. If it reaches 3mgKOH / g, stop the reaction.

[0023] Add 16.8g of hexamethylene diisocyanate into another four-necked flask, mix the above-mentioned reaction intermediate product containing three double bonds and one hydroxyl group after water removal treatment with 0.5g of dibutyltin dilaurate, and mix it by dropping The method is added to the flask, the dropping time is 60-90min, the reaction temperature is controlled between 60-70°C, and when the content of the isocyanate group in the system is less than 2%, the reaction ends and a white viscous liquid is obtained.

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 method for preparing urethane chain rod-type high durable end-group polyene-bond photocuring prepolymer and belongs to the field of the UV curing resin. In the method, a polybasic acid substance comprising hydroxyl group, a substance containing both epoxy group and double bond, polyisocyanates which does not contain a benzene ring and a certain molecular weight of polyether polyol which serve as the raw materials are synthesized to form the urethane chain rod-type high durable end-group polyene-bond photocuring prepolymer. The prepolymer has high reactivity and high hardness of the hyper-branched resin, also has high elasticity of polyurethane and is an UV-curing resin with high performance.

Description

Technical field [0001] A preparation method of urethane chain rod type high weather-resistant end group polyethylenic bond photocurable prepolymer belongs to the technical field of ultraviolet light curing resin. Background technique [0002] With the world’s increasing attention to environmental protection and the vigorous development of green technology, UV curing technology has attracted more and more attention due to its fast curing speed, good film performance, and green environmental protection. It has been applied in many sectors of the national economy. It is becoming more and more widespread and growing rapidly. In recent years, China has made gratifying progress in the development and production of UV curing materials and technical equipment. It has reached the international advanced level in the development and production of prepolymers, reactive diluents, photoinitiators, and UV light sources. Level. [0003] Existing UV-curable resins mainly include epoxy acrylate, p...

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): C08G18/67
Inventor 姚伯龙李海亮孔祥永李祥褚路轩
Owner JIANGNAN UNIV