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

Polyester polyol and preparation method thereof

A polyester polyol and diol technology, applied in the field of polymers, can solve the problems of three wastes, etc., and achieve the effect of saving energy consumption and excellent crystallization performance

Active Publication Date: 2021-01-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
View PDF12 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a kind of polyester polyol and preparation method thereof, the present invention has prepared a kind of novel PET polyester polyol by chemical alcoholysis method to PET through the method of "one pot cooking", does not need The complex post-processing process greatly saves energy consumption and solves the problem of generating a large amount of "three wastes"

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 polyol and preparation method thereof
  • Polyester polyol and preparation method thereof
  • Polyester polyol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The present invention provides a kind of preparation method of polyester polyol described in above-mentioned technical scheme, comprising:

[0037] Carrying out the first reaction of PET, poly(carbonate-ether) glycol, small molecule glycol, catalyst and antioxidant to obtain a reaction product;

[0038] The reaction product and the small molecule dibasic acid are subjected to a second reaction to obtain polyester polyol.

[0039] In the present invention, the type and amount of the PET, poly(carbonate-ether) glycol, small molecule glycol, catalyst, antioxidant and small molecule dibasic acid are consistent with those described in the above-mentioned technical scheme. This will not be repeated here.

[0040] In the present invention, the first reaction is preferably carried out under the protection of nitrogen. In the present invention, the first reaction preferably includes:

[0041] After raising the temperature of PET, poly(carbonate-ether) glycol, small molecule gly...

Embodiment 1

[0048] The poly(carbonate-ether) glycol used in embodiment 1 is prepared according to the embodiment 15 method reported in the invention patent 201110231493.6; The poly(carbonate-ether) glycol used in embodiment 2 is according to the report in the invention patent 201110231493.6 Embodiment 9 method is prepared; Poly(carbonate-ether) glycol used in embodiment 3 is prepared according to the embodiment 17 method reported in the invention patent 201110231493.6; Poly(carbonate-ether) glycol used in embodiment 4 is according to The method of Example 12 reported in the patent of invention 201110231493.6 is prepared; the poly(carbonate-ether) glycol used in Example 5 is prepared according to the method of Example 18 reported in the patent of invention 201110231493.6; the poly(carbonate-ether) glycol used in Example 6 is prepared Ether) diols were prepared according to the method of Example 16 reported in the invention patent 201110231493.6.

[0049] The synthesis of embodiment 1 PET p...

Embodiment 2

[0053] The synthesis of embodiment 2 PET polyester polyols

[0054] Under the protection of nitrogen, 350g of PET, 1200g of poly(carbonate-ether) glycol (the number average molecular weight is 6400, and the carbonate unit content is 36.8%), 117g of 1,4-butanediol are successively dropped into the reactor , 1.15g of manganese acetate, 0.26g of IRGANOX1076, after the temperature rises to 170°C, start stirring, react for 0.5 hours, then gradually raise the temperature to 250°C at a heating rate of 5°C / min, continue to react for 3 hours, the acid value is The reaction was stopped at 10 mgKOH / g to obtain a reaction product.

[0055] Reduce the temperature of the obtained reaction product to 120°C, add 59g of 1,6-adipic acid, gradually raise the temperature to 250°C at a heating rate of 5°C / min, and continue the reaction for 2 hours until the acid value is 30mgKOH / g. Start vacuum dehydration, when the acid value is 5mgKOH / g, cool to 100°C and discharge to obtain PET polyester polyo...

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 provides polyester polyol, which is prepared from the following raw materials in parts by weight: 185-350 parts of PET (Polyethylene Terephthalate); 0.15 to 1.15 parts of a catalyst; 380to 1200 parts of poly (carbonic ester ether) dihydric alcohol; 65 to 117 parts of small molecular diol; 27 to 59 parts of small molecular binary acid; 0.05 to 0.26 part of an antioxidant. The preparation method of the polyester polyol provided by the invention does not need a complex post-treatment process, so that the energy consumption is greatly reduced, and the problem that a large amount ofthree wastes are generated is solved; the polyester polyol prepared by the invention has three groups of sharp spectral peaks in a range of 19-24 DEG C, which indicates that the polyol has excellent crystallinity and can become a substitute of the traditional polyester polyol. The invention also provides a preparation method of the polyester polyol.

Description

technical field [0001] The invention belongs to the technical field of polymers, in particular to a polyester polyol and a preparation method thereof. Background technique [0002] As one of the five major engineering plastics, PET (polyethylene terephthalate) has been widely used in many fields such as packaging materials such as beverages and food, fibers and films due to its excellent performance. During the production process of PET, waste products and scraps will be produced, and a surprising amount of waste will be generated after use. The amount of waste exceeds 8 million tons per year. However, PET is extremely chemically inert and cannot be biodegraded under natural conditions. The environment has caused huge "white pollution" and seriously damaged the environment, and the raw materials for PET production come from non-renewable petrochemical resources, which will cause great waste. Therefore, the recycling of PET has been widely concerned and researched at home an...

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): C08G63/183C08G63/16C07C67/03C07C69/82
CPCC08G63/183C08G63/16C07C67/03C07C69/82
Inventor 张红明赵君宇王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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