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

Preparation technology of polyether polyol for polyurethane rigid foam with polyr alcohol as initiator

A technology of polyether polyol and rigid foam, which is applied in the field of chemical synthesis of polyether polyol and the preparation of polyether polyol, to achieve the effect of convenient operation, less impurities and reasonable method

Inactive Publication Date: 2011-12-28
TIANJIN JINGUIGU XYLITOL
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology not only has reasonable process and simple preparation, but also has good product quality and low cost, and solves the problem of environmental pollution

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The preparation process adopts a batch process (reaction process and refining process), which is divided into two steps, that is, the reaction process and the refining process.

[0017] 1. Reaction process: Put a specified amount of starter poly-R alcohol and catalyst potassium hydroxide into the stainless steel high-pressure reactor, stir, pass low-pressure saturated steam into the jacket, and heat the material in the reactor to 100°C. Vacuum dehydration for 0.5h, the vacuum degree reaches 750mmHg, start to add polypropylene oxide under vacuum, control the temperature at 110±5°C and add polypropylene oxide dropwise, the feeding speed is 3-4g / min, and the reaction is cooled with jacket water The heat is removed to keep the temperature at 110±5°C and the pressure ≤0.44mPa. After feeding the polypropylene oxide, carry out the internal pressure reaction with a reaction pressure of ≤0.4mPa for 3 hours, then remove the monomers in a vacuum for 0.5 hours, and control the temp...

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 discloses a preparation technology of polyether polyol used for synthesizing polyurethane rigid foam by using poly R alcohol as an initiator. The synthesis process adopts a batch process, the reaction temperature of the reaction process is 90-150°C, and the reaction pressure is ≤ 0.4MPa, after the completion of the polymerization reaction, the aging reaction is carried out for about 1~3h; the refining temperature of the refining process is ≥85°C, neutralization under normal pressure, dehydration under reduced pressure, and the pressure during dehydration is ≤10mmHg. The process is reasonable and the use is convenient, and it is an ideal polyether polyol preparation method technology.

Description

Technical field [0001] The present invention relates to a kind of chemical product-polyether polyol preparation method, especially a kind of preparation technology of the polyether polyol used for synthesizing polyurethane rigid foam with poly R alcohol as initiator, suitable for chemical industry synthesis polyether polyol . Background technique [0002] At present, the chemical product-polyether polyol is widely used. The synthesis process usually uses an organic compound with active hydrogen as a starter to prepare polyether polyol. Add polypropylene oxide (PO) and Ethylene oxide (EO), the active hydrogen-containing initiator used has a functionality of 2, such as ethylene glycol, propylene glycol; a functionality of 3, such as glycerin, trimethylolpropane; a functionality of 4, There are pentaerythritol, ethylenediamine, and toluenediamine; those with a functionality of 5 include xylitol; those with a functionality of 6 include sorbitol; those with a functionality of 8 ...

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): C08G65/34C08G65/46C08G18/48C08G101/00
Inventor 马永华
Owner TIANJIN JINGUIGU XYLITOL