Polyether glycol, polyurethane rigid foamed plastic and preparation methods thereof

A technology of rigid foam plastic and polyether polyol, which is applied in the fields of ether preparation, chemical instruments and methods, sugar derivative preparation, etc., can solve the problems of high viscosity of polyether polyol, affecting process performance and low functionality, etc. To achieve the effect of excellent flame resistance, good process performance and high functionality

Inactive Publication Date: 2011-05-11
SHANGHAI DONGDA POLYURETHANE
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of high viscosity and low functionality of the existing polyether polyols used for high temperature resistant and flame resistant polyurethane rigid foams, which affect the process performance, and provide a Polyether polyol with lower viscosity and higher functionality, polyurethane rigid foam with excellent high temperature resistance, flame resistance and compressive strength prepared therefrom, and their preparation method

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
  • Polyether glycol, polyurethane rigid foamed plastic and preparation methods thereof
  • Polyether glycol, polyurethane rigid foamed plastic and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of embodiment 1 polyether polyol

[0025] In a 15L polyether reactor, add 25g of glycerin, 250g of dimethylolphenol, 350g of sucrose and 5g of potassium hydroxide, melt at 80°C, dehydrate at 115°C under vacuum (1500Pa) for 2h, and obtain potassium alkoxide solution. The temperature was lowered to 80° C., nitrogen replacement was carried out, and this was repeated three times.

[0026]Afterwards, add 1100g of propylene oxide in batches: add 80g of propylene oxide, start stirring and heat up to 80°C; then slowly add 70g of propylene oxide (adding in 2 times, taking 1 hour), and then keep warm at 80°C for 1 hour , the pressure in the kettle drops to 0.1MPa; continue to add 100g of propylene oxide, and raise the temperature to 110°C; when the pressure in the kettle drops to 0.1MPa, put in 100g of propylene oxide, and the temperature It will rise gradually. When it reaches 120°C, the pressure in the kettle will drop rapidly. Immediately pass circulating wate...

Embodiment 2

[0028] Embodiment 2 Preparation of polyether polyol

[0029] In the raw material formula, except that the addition of propylene oxide is 1300g, the type and consumption of other raw materials, as well as the process operation method and conditions are the same as in Example 1, and the polyether polyol of the present invention is obtained.

Embodiment 3

[0030] Embodiment 3 Preparation of polyether polyol

[0031] In the raw material formula, glycerin is 50g, dimethylolphenol is 125g, sucrose is 450g, propylene oxide is 1150g, other raw material types and consumption, and process operation method and conditions are the same as embodiment 1, and the polyether polyol of the present invention is obtained. alcohol.

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
hydroxyl valueaaaaaaaaaa
viscosityaaaaaaaaaa
Functional group degreeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of polyether glycol. The method comprises the following step: preparing the polyether glycol from compound initiator, polyether glycol synthetic catalyst and propylene oxide by using a conventional polyether glycol synthesis method, wherein the compound initiator comprises the following components in parts by weight: 0.04-0.08 part of glycerol, 0.2-0.4 part of dihydroxymethylphenol and 0.56-0.72 part of sucrose; and the mass ratio of the propylene oxide to the compound initiator is 1.7-2.3. The invention also discloses polyether glycol prepared by using the method, a method for preparing polyurethane rigid foamed plastic from the polyether glycol, and polyurethane rigid foamed plastic. The polyether glycol disclosed by the invention has the advantages of low viscosity and high functionality, and has favorable processing properties when being used as a raw material. The polyurethane rigid foamed plastic prepared from the polyether glycol has the advantages of excellent high-temperature resistance, high flame resistance and high compression strength.

Description

technical field [0001] The invention relates to a polyether polyol, a polyurethane rigid foam, and their preparation methods. Background technique [0002] Polyurethane rigid foam has good physical and mechanical properties, acoustic properties and chemical resistance, especially low thermal conductivity, and is widely used in various insulation fields such as home appliances, building panels, pipes, and exterior wall spraying. After the country promulgated the 65% building energy saving policy and the Copenhagen Conference, the requirements for building energy saving are getting higher and higher. As an excellent thermal insulation material, polyurethane rigid foam is ushering in a new development opportunity for the polyurethane industry. However, ordinary polyurethane foam has disadvantages such as poor high temperature resistance and flammability, which affect its application in fields such as construction, panels and pipes. [0003] The development of polyurethane rigi...

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): C08G65/28C07C43/11C07C43/205C07C41/03C07H15/08C07H1/00C08L75/08C08J9/14C08G18/48
Inventor 信延垒李心强董建国任丽
Owner SHANGHAI DONGDA POLYURETHANE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap