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

Method for preparing polycarbonate polyol and composition comprising the polycarbonate polyol

A polyol composition, polycarbonate technology, applied in the direction of silicate, magnesium silicate, alkali metal silicate, etc., can solve problems such as affecting the properties of polycarbonate polyol products

Active Publication Date: 2019-07-09
IND TECH RES INST
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the general traditional polycarbonate polyol production method is to carry out transesterification reaction between organic carbonate and polyol at a specific pressure (1.5 to 100 bar) and temperature (100°C to 300°C). During the reaction process, there will be methanol and other alcohols. Class (depending on the type of organic carbonate) and unreacted carbonate distilled, the reaction will add a catalyst containing alkaline earth metal or transition metal, the residue of these catalysts will affect the product properties of polycarbonate polyols, so the choice of catalyst and use must be carefully evaluated

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
  • Method for preparing polycarbonate polyol and composition comprising the polycarbonate polyol
  • Method for preparing polycarbonate polyol and composition comprising the polycarbonate polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]In a reactor with a mechanical stirrer, a heating mantle, a Dean-Stark Trap, a water-cooled condenser and a vacuum pump, 1,6-hexanediol (58.66 g; 0.50 mole ), ethylene carbonate (41.04g; 0.47mole) and 1 gram of nano-silicon chips with sodium ions as a catalyst, the addition amount is 1wt%, and then enters stage one, under the condition of nitrogen gas and the absolute pressure is maintained at 760torr, heated to 100°C, use mechanical stirring (500rpm) for 0.5 hours, enter stage 2, raise the temperature to 150°C for 1 hour, enter stage 3, and then raise the temperature to 180°C for 4 hours. Then, enter the fourth stage, the reactor is evacuated by a pump, the temperature is kept at 180°C, and the vacuum value is reduced from 760torr (ie 1atm; 760mm-Hg) to 100torr after 1 hour of reaction, the lower boiling point can be observed (196°C) ethylene glycol (EG) was removed by a Dean-Stark separator. Finally, enter stage five, then reduce the vacuum value to 50torr and continu...

Embodiment 2

[0028] The preparation method conditions of embodiment two are as described in embodiment one, except that the consumption of sodium ion nano-silicon flakes is changed to 0.5wt% in addition to the catalyst, and the polycarbonate polyol with nano-silicon flakes is centrifuged to remove nano-silicon flakes to obtain 72.82 grams of polycarbonate polyol, brown in color, semi-solid at room temperature, 72% yield. The viscosity is 630cps.

Embodiment 3

[0030] The preparation method conditions of embodiment three are as described in embodiment one, except that the consumption of sodium ion nano-silicon flakes is changed to 1.5wt% in addition to the catalyst, and the polycarbonate polyol with nano-silicon flakes is centrifuged to remove nano-silicon flakes to obtain 69.89 g of polycarbonate polyol, brown in color, semi-solid at room temperature, 69% yield. The viscosity is 540cps.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided are a method for manufacturing polycarbonate polyol and a composition including the polycarbonate polyol. The composition includes polycarbonate polyol; a plurality of nanoscale silicate platelets having 10,000 to 20,000 (units / per platelet) of metal cations on surfaces thereof, wherein the polycarbonate polyol has a viscosity of from 265 to 1520 cps.

Description

technical field [0001] The invention relates to a method for preparing polycarbonate polyols, in particular to a method for preparing polycarbonate polyols and a composition of polycarbonate polyols that catalyze the reaction of carbonate compounds and diol compounds by means of nanometer silicon chips. Background technique [0002] Polycarbonate polyols are excellent in transparency, heat resistance, and mechanical strength, and are widely used in industries such as electrical and electronic parts, automotive parts, optical recording media, and lenses. [0003] However, the general traditional polycarbonate polyol production method is to carry out transesterification reaction between organic carbonate and polyol at a specific pressure (1.5 to 100 bar) and temperature (100°C to 300°C). During the reaction process, there will be methanol and other alcohols. Class (depending on the type of organic carbonate) and unreacted carbonate distilled, the reaction will add a catalyst c...

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): C08G64/30C08G64/02
CPCC08G64/305C08G64/0208C01B33/22C01B33/32C08K9/02C08K3/34C08K2201/011B82Y30/00B01J37/30B01J21/16C08L69/00C01P2004/24B82Y40/00C08G64/40
Inventor 吴信忠吕奇明沈圣彦林江珍
Owner IND TECH RES INST
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