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

Dual-curable polyurethane toughened resin and preparation method and application thereof

A toughened resin and dual curing technology, which is applied in the field of dual curable polyurethane toughened resin and its preparation, can solve the problems of reduced curing speed, reduced adhesion, and reduced Tg, to achieve increased curing speed, improved adhesion, and volume small shrinkage effect

Active Publication Date: 2019-08-23
武汉长盈鑫科技有限公司
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also problems such as low elongation, high stress, and easy sagging, which limit its use in environments with large changes in high and low temperatures
[0003] Therefore, how to toughen cycloaliphatic epoxy resins has always been a research hotspot. Traditional toughening methods include adding nanoparticles, core-shell rubber, introducing non-curable resin components, and modifying epoxy resin itself. However, these methods have certain limitations
For example, the introduction of nanoparticles and core-shell rubber will affect the transparency and prone to problems of poor dispersion and poor storage stability; the introduction of non-curable resin components will reduce the curing speed, affect the product's tolerance to solvents, and easily occur Migration; the modification of epoxy resin itself is cumbersome and costly, and some good properties of epoxy resin itself may change after modification, such as Tg reduction, adhesion decline, etc.

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
  • Dual-curable polyurethane toughened resin and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of PPG1000-PU

[0030] S1. First mix 26.78g of 3-oxetanemethanol with 34.09g of hydroxyethyl acrylate (molar ratio 1:1) to obtain substance A;

[0031] Another 135.12 g of isophorone diisocyanate (IPDI) were added to obtain substance B;

[0032] Add 0.5 g of the polymerization inhibitor p-hydroxyanisole and 0.5 g of the catalyst dibutyltin dilaurate to the substance B, mix them uniformly, and maintain the reaction at 60 ° C for 2 hours to obtain the isocyanate semi-blocked composition C;

[0033] S2. Add 304.01 g of macromolecular polyol polypropylene glycol 2000 (PPG2000, 2-functional) according to the molar ratio of the composition to the reactive group in the macromolecular polyol -NCO:-OH=1:1 and keep it at 70°C for 6 hours to react. The finished product PPG1000-PU can be obtained.

Embodiment 2

[0035] Preparation of PPG600-PU

[0036] S1. First mix 58.75g of 3-methyl-3-hydroxymethyloxetane and 37.43g of hydroxypropyl acrylate (molar ratio 1:0.5) evenly to obtain substance A;

[0037] 144.96 g of hexamethylene diisocyanate (IPDI) were added to obtain substance B;

[0038] Add 0.4g of the polymerization inhibitor p-hydroxyanisole and 0.4g of the catalyst dibutyltin dilaurate to the substance B, mix them uniformly, and then maintain the reaction at 50°C for 3 hours to obtain the isocyanate semi-blocked composition C;

[0039] S2. According to the molar ratio of the composition to the reactive group in the macromolecular polyol -NCO:-OH=1:1, add 258.86g macromolecular polyol polyethylene glycol 600 (PEG600, 2 functional) and keep it at 80°C for reaction 4 The finished product PPG600-PU can be obtained within hours.

Embodiment 3

[0041] Preparation of PTMG1400-PU

[0042] S1. First mix 21.21g of 3-oxetanepropanol and 39.49g of hydroxybutyl acrylate (molar ratio 1:1.5) evenly to obtain substance A;

[0043] An additional 119.76 g of dicyclohexylmethane diisocyanate (HMDI) was added to obtain substance B;

[0044] Add 0.45g of polymerization inhibitor p-hydroxyanisole and 0.45g of catalyst organic bismuth catalyst bismuth neodecanoate to substance B, mix uniformly and maintain 40°C for 4 hours to obtain isocyanate semi-blocked composition C;

[0045] S2. According to the molar ratio of the composition to the reactive group in the macromolecular polyol -NCO:-OH=1:1, add 319.54g macromolecular polyol polytetrahydrofuran ether 1400 (PTMG1400, 2 functional) and keep it at 88°C for 3 hours. The finished product PTMG1400-PU can be obtained.

[0046] The application effects of the foregoing embodiments of the present invention are as follows:

[0047] Four sets of comparative examples were designed as follow...

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 of dual-curable polyurethane toughened resin. The preparation method comprises the following steps: S1, mixing hydroxyl-containing oxetane, hydroxyl acrylate, a diisocyanate, a polymerization inhibitor and a catalyst for reacting to obtain an isocyanate semi-closed composition C for later use; and S2, adding a macromolecular polyhydric alcohol into thecomposition C, keeping the temperature at 60-90 DEG C, and carrying out a reaction for 2-8 hours to obtain the dual-curable polyurethane toughened resin. The advantages are that the polyurethane toughened resin disclosed by the invention can be subjected to free radical-cation dual photocuring or dual curing of free radical photocuring-cation thermal curing; the curing speed can be increased, volume shrinkage is small during curing, and adhesive force of the system to a base material is improved; when the polyurethane toughened resin is added to an alicyclic epoxy resin system according to a certain ratio, elasticity, extensibility and toughness of the system can be effectively improved; and in addition the oxetane is a four-membered ring, so that the volume shrinkage is small during curing, and the adhesive force of the system to the base material can be improved.

Description

technical field [0001] The invention relates to the fields of ultraviolet light curing and cationic curing, in particular to a dual-curable polyurethane toughening resin and its preparation method and application. Background technique [0002] Cycloaliphatic epoxy resin is a kind of epoxy resin that is widely used. It has the advantages of light color, low viscosity, small shrinkage of curing volume, good adhesion and high temperature resistance. However, there are also problems such as low elongation, high stress, and easy sagging, which limit its use in environments with large changes in high and low temperatures. [0003] Therefore, how to toughen cycloaliphatic epoxy resins has always been a research hotspot. Traditional toughening methods include adding nanoparticles, core-shell rubber, introducing non-curable resin components, and modifying epoxy resin itself. However, these The methods have certain limitations. For example, the introduction of nanoparticles and core...

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): C08G18/67C08G18/48C08L63/00C08L75/14
CPCC08G18/48C08G18/672C08L63/00C08L75/14
Inventor 黄星余晓梦崔丽云万欢皮亚斌
Owner 武汉长盈鑫科技有限公司
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