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

Waste PET-based polyurethane elastomer and preparation method thereof

A polyurethane elastomer and polyurethane elasticity technology, which is applied in the field of organic polymer resin synthesis, can solve the problems of reducing the production cost and environmental pollution of the polyurethane elastomer, and achieve the effects of reducing the production cost, being suitable for popularization and application, and having high heat resistance.

Inactive Publication Date: 2015-10-28
XIAN UNIV OF TECH
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a polyurethane elastomer based on waste PET and its preparation method, aiming to solve the environmental pollution problem caused by the increasingly serious packaging waste PET bottles. The present invention recycles waste PET bottles, significantly Reduce the production cost of polyurethane elastomers and synthesize environmentally friendly polyurethane elastomers with increasingly widening application ranges

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
  • Waste PET-based polyurethane elastomer and preparation method thereof
  • Waste PET-based polyurethane elastomer and preparation method thereof
  • Waste PET-based polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Preparation of PET alcoholyzate: use waste PET bottle recycling to generate alcoholyzate, using the raw materials in parts by mass in Table 1:

[0065] Table 1 Raw material ratio table (mass percentage) of waste PET bottle recycling to generate alcoholylate

[0066] waste PET bottle

Neopentyl glycol

Dipropylene glycol

n-Butyl titanate

[0067]

NPG

(DPG)

31％

24％

40％

5％

[0068] Preparation:

[0069] a. Cut the recovered waste PET bottles into 5mm×5mm slices, place them in a beaker, pour distilled water into the beaker and stir with a glass rod, put the beaker into an ultrasonic cleaner for 20 minutes, and then clean the beaker The discarded PET flakes are poured out and filtered through an 80-mesh sieve to remove water. Repeat the above process three times, and finally put the discarded PET flakes in an 80-mesh mesh sieve to dry, and then dry them naturally in the air for 3 hours, and then ...

Embodiment 2

[0074] The present embodiment 2 prepares the polyurethane elastomer based on waste PET, adopts the raw material of mass percentage in the following table:

[0075]

[0076]

[0077] Concrete preparation process is as follows:

[0078] a. Put diphenylmethane diisocyanate (MDI), polytetrahydrofuran diol (PTMEG), polycaprolactone diol (PCL) and 1,4-cyclohexane diisocyanate (CHDI) into a stirring device , a thermometer, and a four-necked flask with a nitrogen tube, put it into an oil bath and heat up to 80°C and stir for 2 hours, add the catalyst dibutyltin dilaurate (DBTDL) and continue to stir for 30 minutes to react. During the entire reaction process, continue Nitrogen for protection;

[0079] b. Stir the mixture of N,N'-dicyclohexylcarbodiimide (DCC), neopentyl glycol (NPG) and PET alcoholylate under the action of a magnetic stirrer for 20 minutes to make it evenly mixed and have a moderate viscosity, then Quickly add the homogeneous mixture to the reaction system of ...

Embodiment 3

[0082] This Example 3 prepares a polyurethane elastomer based on waste PET. The preparation method is the same as that of Example 2, except that the ratio of raw materials is different. In this example, the following raw materials are used in mass percentages:

[0083] PTMEG

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
molecular weight distributionaaaaaaaaaa
Login to View More

Abstract

The invention discloses a waste PET-based polyurethane elastomer which is prepared from the following raw materials, by weight, 20.8-27.7% of polytetramethylene oxide, 10.5-12.4% of methyl diphenylene diisocyanate, 12.6-15.7% of poly (epsilon-caprolactone) di-OH, 10.8-13.4% of 1,4-cyclohexane diisocyanate, 0.2-0.5% of N,N'-dicyclohexylcarbodiimide, 6.5-8.9% of neopentylene glycol, 0.04-0.08% of dibutyltin dilaurate and 27-35.6% of PET alcoholysate. A preparation method of the waste PET-based polyurethane elastomer comprises the following steps: (1) preparation of a polyurethane prepolymer; (2) preparation of a chain extender composition and reaction between the chain extender composition and the polyurethane prepolymer; and (3) preparation of the polyurethane elastomer by a tape casting method. According to the invention, a waste PET bottle is reutilized, and the prepared polyurethane elastomer has high heat resistance and can be applicable to a high-temperature environment. Meanwhile, production cost can be reduced remarkably, and the polyurethane elastomer is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of organic polymer resin synthesis, and in particular relates to a waste PET-based polyurethane elastomer and a preparation method thereof. Background technique [0002] As the only polymer material in the world that can exhibit thermoplastic, thermosetting, elastomeric and shape memory behaviors, polyurethane has been widely used in industries such as leather, coatings, adhesives, inks, cushioning materials, etc., and its structure is modular. The alternating structure of soft segment and hard segment makes its performance easy to control. As an important part of the polyurethane material family, polyurethane elastomers have received great attention in their performance regulation and potential applications. Polyurethane elastomer has a slightly lower surface resistivity (109-1013Ω), slightly better flame retardancy, and a wide range of adjustable hardness (as low as Shore A10, as high as Shore D80), which...

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): C08G18/66C08G18/48C08G18/42C08G18/12C08J5/18
CPCC08G18/12C08G18/4277C08G18/4854C08G18/6607C08J5/18C08J2375/04
Inventor 方长青周星李言雷婉青安宁丽
Owner XIAN 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