Method for preparing fatty group polycarbonate polylol

A polycarbonate and polyol technology, applied in the field of polyol preparation, can solve problems affecting production and application, and achieve the effects of improving equipment utilization efficiency, reducing production costs, and high carbonate group content

Active Publication Date: 2007-08-29
JIANGSU ZHONGKE JINLONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seriously affected the production and application of this technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] To 100 ml of 5% zinc chloride aqueous solution, add 0.5 g of polyether polyol with a molecular weight of 2000 and 2 functionalities under stirring conditions, add 40 ml of a 20% potassium cobalt cyanide aqueous solution dropwise under stirring conditions, and collect by filtration The resulting white precipitate was washed with water for 5 times, and dried to a constant weight to obtain 6.1g of white powder. Add 1g of propylene oxide to the white powder, react for 10h under stirring at 20°C, and vacuum-dry to constant weight. A high-efficiency carbon dioxide polymerization catalyst is obtained.

[0031] Add 35g high-efficiency carbon dioxide polymerization catalysts prepared according to the above-mentioned method in the fully dry 5000ml autoclave, add 3000ml propylene oxide, 70ml polyether polyol (moisture content 300, average functionality is 3 through fully drying) 300ppm), add carbon dioxide under stirring conditions until the system pressure is 2.5Mpa, heat up to 6...

Embodiment 2

[0033]In the fully dry 5000ml autoclave, add 40g of high-efficiency carbon dioxide polymerization catalyst prepared according to the method of Example 1, add 3000ml of propylene oxide, 70ml of fully dried polyether polyol with a molecular weight of 300 and an average functionality of 3 (moisture content 300ppm), add carbon dioxide under stirring conditions until the system pressure is 5Mpa, heat up to 60 ° C, discharge after 180 minutes of reaction, use vacuum to remove unreacted propylene oxide, and obtain 1231g viscous resin, test shows The carbonate group content is 45%, the by-product propylene carbonate content is 5.2%, and the number average molecular weight is 4580.

Embodiment 3

[0035] Add 45g of the high-efficiency carbon dioxide polymerization catalyst prepared according to the method of Example 1 into a fully dried 5000ml autoclave, add 3000ml of propylene oxide, and 90ml of polyether polyols that are fully dried, have a molecular weight of 300, and an average functionality of 3 (moisture content 300ppm), add carbon dioxide under stirring conditions until the system pressure is 2.5Mpa, heat up to 65 ° C, discharge after 75 minutes of reaction, use vacuum to remove unreacted propylene oxide, obtain 1527g viscous resin, test It shows that the carbonate group content is 30%, the by-product propylene carbonate content is 4.2%, and the number average molecular weight is 4210.

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Abstract

The invention discloses a manufacturing method for aliphatic series polycarbonate polyhydric alcohol that includes the following steps: putting catalyst, epoxide, molecular weight regulator, and solvent into high pressure reaction kettle after being fully dryied, adding CO2 to 0.5-6MPa, heating to 30-150 degree centigrade, polymerizing for 0.5-50 hours; and removing the unreacted epoxide, the product would be gained.

Description

technical field [0001] The present invention relates to a kind of preparation method of polyol, more specifically relate to a kind of preparation method of aliphatic polycarbonate polyol. Background technique [0002] Aliphatic polycarbonate polyol is a new type of polyol resin. Its molecular main chain contains aliphatic alkylene and carbonate group repeating units. It is quite different from traditional polycarbonate materials, but more than aliphatic polyester Alcohols are similar to polyether polyols, and are between polyester and polyether polyols, such as having a lower glass transition temperature (glass transition), better room temperature flexibility, etc., prepared from this polyol Polyurethane materials have many unique properties. For example, this type of polyurethane elastomer has the excellent hydrolysis resistance and low temperature flexibility of polyether polyurethane elastomers and the high mechanical strength, excellent wear resistance and oil resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/32
Inventor 刘保华巴伟徐玉俊徐玉华马雄邦李素晓
Owner JIANGSU ZHONGKE JINLONG CHEM
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