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

Toughened modified vinyl ester resin and synthesis method thereof

A vinyl ester resin, toughening modification technology, applied in the field of toughening modified vinyl ester resin and its synthesis, to achieve the effects of clear reaction end point control, high elongation at break and good effect

Inactive Publication Date: 2020-02-11
EAST CHINA UNIV OF SCI & TECH
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resin cast body tensile strength 86MPa, bending strength 140MPa, impact strength 11kJ / m 2 , the reaction end point is clear, and the obtained resin has good reproducibility, but the toughness improvement is limited

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
  • Toughened modified vinyl ester resin and synthesis method thereof
  • Toughened modified vinyl ester resin and synthesis method thereof
  • Toughened modified vinyl ester resin and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] The present invention also provides the synthetic method of described toughening modified vinyl ester resin, comprises the following steps:

[0047] (1) Add diisocyanate and flexible diol in sequence in the reaction kettle, then add catalyst A, start stirring until the isocyanate content reaches 1-9% (mass fraction) as the reaction end point, and obtain an isocyanate-terminated polyurethane prepolymer;

[0048] (2) In the stirred reactor, add in order by mass percentage:

[0049]

[0050] Carry out the reaction until the acid value drops below 12mgKOH / g;

[0051] (3) After cooling the reaction product obtained in step (2), add 5 to 20% of the isocyanate-terminated polyurethane prepolymer obtained in step (1) to react, and when the content of isocyanate groups is zero, the end point of the reaction is reached, and adding 30-40% cross-linking agent, stir evenly to obtain toughened modified vinyl ester resin.

[0052] In one embodiment of the present invention, in ste...

Embodiment 1

[0062] Put 3000g polyethylene glycol 600, 1890g toluene diisocyanate, 3g dibutyltin dilaurate into the reaction kettle, gradually raise the temperature to 80°C, measure the content of isocyanate group every half hour until the content of isocyanate group is 8.6%. At the end point, an isocyanate-terminated polyurethane prepolymer is obtained.

[0063] In another reaction kettle, add 1850g E-51 bisphenol A epoxy resin, 720g acrylic acid, 12.85g benzyltriethylammonium chloride, 0.1285g methyl hydrogen kiln under stirring state, and control the reaction temperature at 100 to 120°C Under the reaction, measure the acid value every half an hour until the acid value drops below 12mgKOH / g, cool the reaction product to about 70°C and add 755g of polyurethane prepolymer prepared by the above steps, keep the reaction temperature at 70°C, Add 3.5g of dibutyltin dilaurate, measure the isocyanate content every half an hour, until the isocyanate content is zero as the reaction end point, add ...

Embodiment 2

[0065] Put 3000g polyethylene glycol 1000, 2835g diphenylmethane diisocyanate, 1.5g dibutyltin dilaurate into the stirred reactor, keep the reaction temperature at about 75°C, measure the isocyanate content every half hour until the isocyanate content is 5.6% was the end point of the reaction. In another stirred reactor, add 1850gE-51 bisphenol A epoxy resin, 860g methacrylic acid, 10.84g benzyldimethylamine, 1.084g hydroquinone, the reaction temperature is controlled at 100~120°C, every Measure the acid value once half an hour until the acid value drops below 12mgKOH / g as the end point of the reaction, cool the reaction product to about 70°C, add 797g of polyurethane prepolymer, add 4g of dibutyltin dilaurate, control the reaction temperature at 70°C, Measure the isocyanate group content every half hour until the isocyanate content is 0 and reach the end of the reaction, add 2000g styrene and 350g methyl methacrylate, and stir evenly to obtain a toughened modified vinyl ester...

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
impact strengthaaaaaaaaaa
impact strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a toughened modified vinyl ester resin and a synthesis method thereof. The method comprises the following steps: (1) adding diisocyanate and flexible dihydric alcohol into a reaction kettle, adding a catalyst A, and taking the point at which the content of isocyanate reaches 1-9% as a reaction endpoint so as to prepare an isocyanate-terminated polyurethane prepolymer; (2)adding 35-49% of epoxy resin, 10-20% of unsaturated monocarboxylic acid, 0.1-1.0% of a catalyst B and 0.01-0.1% of a polymerization inhibitor into another reaction kettle, and performing a reaction until the acid value is reduced to 12 mgKOH / g or below; and (3) lowering the temperature, adding 5-20% of the polyurethane prepolymer and 0.05-0.2% of the catalyst A performing a reaction until the content of isocyanate groups is zero to reach a reaction endpoint, and finally adding 30-40% of a cross-linking agent to obtain the polyurethane toughened and modified vinyl ester resin. Compared with theprior art, the preparation method has the advantages of completeness in chain extension reaction, good toughening effect, few side reactions, safety, environmental protection and stable quality through optimizing the molecular structure by reacting the isocyanate-terminated polyurethane prepolymer with the vinyl ester resin and introducing a flexible group is introduced into the molecular chain.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a toughened modified vinyl ester resin and a synthesis method thereof. Background technique [0002] Vinyl ester resin, also known as epoxy acrylate resin, is prepared by ring-opening addition reaction of epoxy resin and monounsaturated carboxylic acid, and then dissolved in unsaturated polymerizable monomer. Vinyl ester resin has some advantages of epoxy resin and unsaturated polyester resin: it not only has excellent mechanical properties of epoxy resin, such as high mechanical strength, but also has a similar curing mechanism of unsaturated polyester resin, and can be used in It can be cured at room temperature, and the molding method can be selected widely. It can be said that it has the advantages of both epoxy resin and unsaturated polyurethane resin. Under the action of initiators and accelerators, it can further undergo copolymerization reaction wit...

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): C08G81/00
CPCC08G81/00
Inventor 管涌白国栋江先龙危大福丁晓雪郑安呐许祥
Owner EAST CHINA UNIV OF SCI & TECH
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