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

Polyester elastomer and preparation method thereof

A technology of polyester elastomer and esterification reaction, applied in the field of polyester elastomer and its preparation, can solve problems such as high glass transition temperature, and achieve the effects of good resilience, low glass transition temperature and excellent tensile properties

Inactive Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such copolyesters still have a high glass transition temperature

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
  • Polyester elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] The preparation method of polyester elastomer provided by the invention comprises: under the condition of esterification reaction and / or transesterification reaction, make the mixture that contains dibasic carboxylic acid (ester) and dibasic alcohol react; Under polycondensation reaction condition, In the presence of a polycondensation catalyst, the product after the esterification reaction and / or transesterification reaction is subjected to a polycondensation reaction; wherein, the dicarboxylic acid (ester) contains succinic acid (ester), isophthalic acid (ester) and For terephthalic acid (ester), the dihydric alcohol contains ethylene glycol.

[0015] In the present invention, said dibasic carboxylic acid (ester) means dibasic carboxylic acid and / or dibasic carboxylic acid ester, similarly, said succinic acid (ester) means succinic acid and / or succinic acid ester , the isophthalic acid (ester) means isophthalic acid and / or isophthalic acid ester, and the terephthalic ...

Embodiment 1

[0053] Add 16.6g (0.1mol) of isophthalic acid, 166g (1.0mol) of terephthalic acid, 93g (1.5mol) of ethylene glycol, 13g (0.11mol) of succinic acid and ethylene glycol in a batch reactor Diol antimony (based on the weight of the above-mentioned dicarboxylic acid (ester), the consumption is 0.01% by weight), after esterification and transesterification at 220~250°C and a pressure of 0.25MPa for 1 hour, the reaction kettle The pressure is released to normal pressure, after adding trimethyl phosphate (based on the weight of the product after esterification and transesterification, the consumption is 0.1% by weight), gradually reduce the pressure and heat up, at 200 ℃, the pressure is under the condition of 30kPa Polycondensate for 0.5 hour, then continue to heat up and depressurize. After 45 minutes, the vacuum of the reactor reaches 1500Pa, and the reaction temperature is maintained at 250-260°C. After another 110 minutes of polymerization, the polymerization reaction is terminate...

Embodiment 2

[0055] Add 16.6g (0.1mol) of isophthalic acid, 62.0g (1.0mol) of ethylene glycol, 106g (0.9mol) of succinic acid and magnesium acetate (with the weight of the above-mentioned dibasic carboxylic acid) in the batch reactor As a benchmark, the amount used is 0.1% by weight), replaced with nitrogen three times, and the esterification was completed after 10 hours of transesterification under normal pressure at 160-240°C. Then add phosphoric acid (based on the weight of the product after the esterification and transesterification reaction, the consumption is 0.5% by weight), ethylene glycol antimony (based on the weight of the above-mentioned dicarboxylic acid (ester), the consumption is 0.03% by weight ) and stir evenly, gradually depressurize and heat up, and polycondense for 4 hours at 220 ° C and a pressure of 10 kPa. Then, continue to heat up and decompress. After 15 minutes, the vacuum of the reactor reaches 90 Pa, and the reaction temperature is maintained at 250 ~ 260 °C, af...

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
Glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polyester elastomer and a preparation method thereof. The method comprises the following steps: under condition of an esterification reaction and / or an ester interchange reaction, a dicarboxylic acid (ester) and dihydric alcohol-containing mixture is reacted; under condensation polymerization condition and existence of a polycondensation catalyst, the products after the esterification reaction and / or the ester interchange reaction; eherein, the dicarboxylic acid (ester) contains succinic acid (ester), isophthalic acid (ester) and terephthalic acid (ester), and dihydric alcohol contains glycol. The polyester elastomer has good biodegradability, has excellent stretching performance and rebound performance.

Description

technical field [0001] The invention relates to a polyester elastomer and a preparation method thereof. Background technique [0002] Elastomer refers to a polymer compound with glass transition temperature lower than room temperature, elongation at break > 50%, and good recovery after external force is withdrawn. According to whether the elastomer can be plasticized, it can be divided into two categories: thermosetting elastomer and thermoplastic elastomer. [0003] Polyethylene terephthalate (PET) is generally used as a thermoplastic material. It has excellent performance in mechanical properties such as crystallinity and strength, chemical resistance, heat resistance, electrical properties, and transparency. It is used in films, fibers, It is widely used in various purposes such as bottles and extruded products. The production capacity of polyethylene terephthalate in my country has reached 25 million tons. In some applications that are not easy to recycle, it is prec...

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): C08G63/183C08G63/181C08G63/20C08G63/52C08G63/78
Inventor 计文希张龙贵祝桂香殷建军许宁韩翎张伟
Owner CHINA PETROLEUM & CHEM CORP
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