Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of polyether carbonate polyol and preparation method thereof

A polyether carbonate and polyol technology, applied in the field of polymers, can solve problems such as insufficient toughness, low activity, and poor reactivity of polyols, and achieve the effect of good mechanical properties and low glass transition temperature

Active Publication Date: 2022-06-24
YANTAI UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this novel polyol with carbon dioxide as a raw material also has a lot of problems in the application process, which is mainly reflected in two aspects: (1) the polyol has poor reactivity, because propylene oxide is mainly used as a raw material in the synthesis process, Therefore, the terminal hydroxyl groups of the prepared polyols are mainly secondary hydroxyl groups, resulting in low activity of polyols when they react with isocyanates, especially when they are used in fields such as polyurethane foams that require high activity.
(2) The performance of polyurethane materials is insufficient. Due to the high glass transition temperature of this type of polyol, the polyurethane materials prepared by it have problems such as poor low temperature resistance and insufficient toughness. The existence of these problems greatly limits its application range
In addition, because the reaction uses propylene oxide and other low-boiling, flammable compounds, the safety requirements in the industrial production process are relatively high, which also increases the production cost of materials.

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 polyether carbonate polyol and preparation method thereof
  • A kind of polyether carbonate polyol and preparation method thereof
  • A kind of polyether carbonate polyol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 30.4g of the starting agent 1,3-propanediol was charged into a 1L reaction flask, which was equipped with a condenser and connected to a nitrogen protection device. 1 g of tin octoate catalyst and 0.15 g of tri-tert-butylphosphine were added. 400 g of ethylene carbonate was added with stirring. After 3 times of nitrogen replacement, the reaction flask was heated to 180° C. and reacted for 12 hours. The temperature was lowered to 100° C., and the unreacted ethylene carbonate was collected under reduced pressure to obtain a viscous polyether carbonate polyol product. The molecular weight of the polyether carbonate polyol was determined by GPC, the number average molecular weight was 1800, and the molecular weight distribution was 1.86. The hydroxyl value of the product was 59.5 by titration. The content of carbon dioxide units in the polyol obtained in this example is about 31.2 wt % through nuclear magnetic detection. Determined by the trifluoroacetate method 19 F-N...

Embodiment 2

[0040]48.5g of the initiator polypropylene glycol (molecular weight 600) was charged into a 1L reaction flask, which was equipped with a condenser and connected to a nitrogen protection device. 0.5 g of tin stearate catalyst and 0.32 g of 1,5,7-triazabicyclo[4.4.0]dec-5-ene were added. 400 g of ethylene carbonate was added with stirring. After 3 times of nitrogen replacement, the reaction flask was heated to 165° C. and reacted for 20 hours. The temperature was lowered to 100° C., and the unreacted ethylene carbonate was collected under reduced pressure to obtain a viscous polyether carbonate polyol product. The molecular weight of the polyether carbonate polyol was determined by GPC, the number average molecular weight was 2800, and the molecular weight distribution was 1.78. The product had a hydroxyl value of 42.5 upon titration. The content of carbon dioxide units in the polyol obtained in this example is about 33.5 wt % through nuclear magnetic detection. The DSC test...

Embodiment 3

[0042] 8.0 g of the starting agent hydroquinone was charged into a 1L reaction flask, which was equipped with a condenser and connected to a nitrogen protection device. 3 g of stannous benzoate catalyst and 0.08 g of bistriphenylphosphine ammonium chloride were added. 400 g of ethylene carbonate was added with stirring. After 3 times of nitrogen replacement, the reaction flask was heated to 170° C. and reacted for 15 hours. The temperature was lowered to 100° C., and the unreacted ethylene carbonate was collected under reduced pressure to obtain a viscous polyether carbonate polyol product. The molecular weight of the polyether carbonate polyol was determined by GPC, the number average molecular weight was 3600, and the molecular weight distribution was 1.48. The hydroxyl value of the product was 32.3 by titration. The content of carbon dioxide units in the polyol obtained in this example is about 25.8 wt % through nuclear magnetic detection. The DSC test results showed th...

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
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention provides a polyether carbonate polyol and a preparation method thereof. The present invention aims at difficult problems such as difficult ring opening of cyclic carbonates and difficult control of decarboxylation reaction. The present invention effectively realizes the preparation of polyether carbonate polyols with controllable carbonate unit content through the method of combining tin catalysts and organic catalysts. The interaction between organic catalysts and metal catalysts can effectively reduce the activation energy of the ring-opening polymerization reaction, which is the main reason for this process. control. The end groups of the polyether carbonate polyol prepared by the invention are completely primary hydroxyl groups, and the content of carbon dioxide units in the structure is between 15.2wt% and 35.5wt%.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a polyether carbonate polyol and a preparation method thereof. Background technique [0002] Oligomer polyol is one of the three major raw materials of polyurethane material industry (oligomer polyol, isocyanate, chain extender). According to the different main chain structures, oligomer polyols are mainly divided into three categories: polyether polyols, polyester polyols and polycarbonate polyols, among which polyether polyols are used the most, accounting for about 90% of the total amount of all polyols. %about. The polyurethane used as raw material has good flexibility and low temperature performance, and because the ether bond is not easily hydrolyzed, it has good hydrolysis resistance. Polyester and polycarbonate polyurethanes have good tensile properties, abrasion resistance and solvent resistance. How to prepare polyol materials with both advantages has always been 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
Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/30C08G64/18C08G64/06C08G64/02C08G18/66C08G18/44C08G18/32
CPCC08G64/305C08G64/307C08G64/183C08G64/0208C08G64/06C08G18/664C08G18/3206C08G18/44
Inventor 秦玉升古雅楠辛志荣
Owner YANTAI UNIV