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

A kind of use waste PET bottle to prepare UV curing polyurethane acrylate and preparation method thereof

A polyurethane acrylate, waste technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of unfavorable environment, high reaction temperature, degradation of paint film performance, etc., to relieve huge pressure, high stability, adhesion high effect

Active Publication Date: 2021-02-12
SOUTH CHINA UNIV OF TECH
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN103436145A discloses a method for preparing alkyd resin coatings by alcoholysis of waste PET glycerol, without separating the alcoholysis products, directly transesterifying with vegetable oils, and then reacting with acid anhydrides to prepare alkyd resin coatings. The recycling process is simple and saves time, but the prepared alkyd resin coating is oily and unfavorable to the environment. At the same time, the small molecules in the alcoholysis product will affect the performance of the final paint film
Farahat, M.S. et al. used diethylene glycol to degrade PET, and subsequently used methacryloyl chloride to modify the degraded PET oligomers to obtain UV light-curable resins, but the mechanical properties of the paint film were better after the process used toxic solvents and cured at the same time. But lack of comprehensive performance
Vandana Jamdar et al. used 2-methyl-1,3-propanediol to alcoholyze waste PET bottles and used recycled PET oligomers and methacrylates to prepare UV photocurable resins. Subsequent studies showed that the synthesized UV resins could be used in basic Under the premise of not affecting the performance of the cured paint film, it can replace up to 50% of the commercial epoxy acrylic resin, and the performance of the cured paint film will be significantly reduced after replacing more than 50%
In the second step, when PET oligomers are synthesized into UV curable resins, there are defects such as high reaction temperature (not conducive to double bond stability) and complex process.

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
  • A kind of use waste PET bottle to prepare UV curing polyurethane acrylate and preparation method thereof
  • A kind of use waste PET bottle to prepare UV curing polyurethane acrylate and preparation method thereof
  • A kind of use waste PET bottle to prepare UV curing polyurethane acrylate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029](1) Alcoholysis of waste PET: cut the waste PET bottle into small pieces, after washing treatment, take 50g PET fragments, 64.65g ethylene glycol, 0.48g zinc acetate, and add them to a four-necked flask with mechanical stirring, condensation device and thermometer In an atmosphere of nitrogen, heating to 190°C and reacting for 1.5 hours to split the PET long chain into hydroxyl-terminated short-chain diols. Among them, the molecular weight of the PET repeating unit is 192 g / mol.

[0030](2) Step (1) After the reaction is completed, a light yellow translucent liquid is obtained, and the alcoholysis solution is suction filtered while it is hot, and the filtrate obtained is ultrasonically washed with deionized hot water at 80°C, and then quickly placed in a high-speed centrifuge at 4000 rpm Centrifuge for 6 minutes to obtain the water-insoluble alcoholysis product. Take the precipitate and repeat the washing and centrifugation operation 3 times. Place the alcoholysis product in a va...

Embodiment 2

[0034](1) Alcoholysis of waste PET: cut the waste PET bottle into small pieces, after washing, take 50g PET fragments, 48.49g ethylene glycol, 0.48g zinc acetate, and add them to a four-necked flask with mechanical stirring, condensation device, and thermometer In a nitrogen atmosphere, heating to 190°C and reacting for 1.5 hours to split the PET long chain into short-chain diols with hydroxyl terminated. Among them, the PET repeat unit molecular weight is 192g / mol.

[0035](2) Step (1) After the reaction is completed, a light yellow translucent liquid is obtained, and the alcoholysis solution is suction filtered while it is hot, and the filtrate obtained is ultrasonically washed with deionized hot water at 80°C, and then quickly placed in a high-speed centrifuge at 4000 rpm Centrifuge for 6 minutes to obtain the water-insoluble alcoholysis product. Take the precipitate and repeat the washing and centrifugation operation 3 times. Place the alcoholysis product in a vacuum drying oven wi...

Embodiment 3

[0039](1) Alcoholysis of waste PET: cut the waste PET bottle into small pieces, after washing, take 50g PET fragments, 48.49g ethylene glycol, 0.48g zinc acetate, and add them to a four-necked flask with mechanical stirring, condensation device, and thermometer In a nitrogen atmosphere, heating to 190°C and reacting for 1.5 hours to split the PET long chain into short-chain diols with hydroxyl terminated. Among them, the molecular weight of the PET repeating unit is 192 g / mol.

[0040](2) Step (1) After the reaction is completed, a light yellow translucent liquid is obtained, and the alcoholysis solution is suction filtered while it is hot, and the filtrate obtained is ultrasonically washed with deionized hot water at 80°C, and then quickly placed in a high-speed centrifuge at 4000 rpm Centrifuge for 6 minutes to obtain the water-insoluble alcoholysis product. Take the precipitate and repeat the washing and centrifugation operation 3 times. Place the alcoholysis product in a vacuum dry...

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
glossaaaaaaaaaa
glossaaaaaaaaaa
adhesivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing UV-cured polyurethane acrylate by using waste PET bottles. The method is as follows: use aromatic or aliphatic diisocyanate and waste PET alcoholyzate to prepare polyurethane prepolymer under the condition of dibutyltin dilaurate; add dibutyltin dilaurate and p-hydroxyanisole dropwise into the reactor And the mixed liquid of acrylate hydroxy ester is subjected to the capping reaction of polyurethane prepolymer to prepare UV curable polyurethane acrylate. The invention recycles waste PET bottles, which not only effectively alleviates the environmental pressure caused by increasing waste PET bottles, but also prepares green and environment-friendly UV curable polyurethane acrylate with good stability.

Description

Technical field[0001]The invention belongs to the technical field of light-curing coatings, and specifically relates to a preparation method of UV-curable polyurethane acrylate from waste PET bottles.Background technique[0002]Polyester (PET) bottles are widely used in the beverage market due to their light weight, good barrier properties, and high strength. Usually these PET beverage bottles are discarded after one use, but PET bottles are difficult to degrade under natural conditions. In order to avoid the serious pollution of waste PET to the environment and increase the utilization rate of non-renewable resources, my country has recycled waste PET beverage bottles. However, compared with developed countries, the recycling rate of waste PET in my country is far from enough, so it is urgent to develop new PET recycling. Craft. PET recycling can be divided into physical recycling method and chemical recycling method. Among them, physical recycling method has the advantages of low in...

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 Patents(China)
IPC IPC(8): C08G18/67C08G18/42C09D175/14
CPCC08G18/4213C08G18/672C08G18/673C09D175/14C08G18/42
Inventor 叶代勇黄锴
Owner SOUTH CHINA UNIV OF 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