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Method for preparing polyether ester polyalcohol

A technology of polyether ester polyol and small molecule polyether, which is applied in the field of preparation of polyether ester polyol, can solve the problems that the dynamic properties of polyurethane cannot reach the expected results, the strength and tensile properties of polyurethane are poor, and the operation is inconvenient. Achieve the effect of low cost, high conversion rate and strong practicability

Inactive Publication Date: 2004-11-24
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high viscosity of the polyester component often brings inconvenience to the operation during physical mixing, and the compatibility of polyester and polyether is poor, which often makes the dynamic properties of polyurethane fail to achieve the expected results.
Japanese Patents Jap.Pat.No.28425., Jap.Pat.No.13880., Jap.Pat.No.162718. and U.S. Patents 4144395, 4487853, 4550194, 5145883 respectively adopt esterification method or add small molecule additives such as phosphorus Compounds and small molecule prepolymers are used to react polyether and polyester to synthesize polyether ester polyols, but this method of esterification modification at the end of polyether polyols often makes the molecules contain a certain amount of short-chain polyester and other by-products, the resulting polyurethane has poor strength and tensile properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 10.0g potassium hexacyanocobaltate in 200ml deionized water to obtain 0.16mol / l potassium hexacyanocobaltate solution; dissolve 20.0g zinc chloride in 40ml deionized water to obtain 3.67mol / l zinc chloride solution; uniformly mix zinc chloride solution and potassium hexacyanocobaltate solution under vigorous stirring to obtain zinc hexacyanocobaltate precipitate. After the precipitation is separated, it is washed 3 times with deionized water, 200ml each time, and the washed precipitate is dried to constant weight under vacuum; the dried precipitate is placed in a closed container filled with ethylene glycol diethyl ether gas, and the precipitate Place to constant weight to obtain zinc hexacyanocobaltate ethylene glycol diethyl ether double metal complex catalyst.

[0020] In dry 1-liter autoclave, add 100g polycyclopropane ether glycol (hydroxyl value 160), 42g phthalic anhydride and 0.03g zinc hexacyanocobaltate ethylene glycol diethyl ether double metal compl...

Embodiment 2

[0022] In a dry 1 liter autoclave, add 100g polycyclopropane ether trihydric alcohol (hydroxyl value 160), 85g maleic anhydride and 0.04g zinc hexacyanocobaltate ethylene glycol diethyl ether double metal complex catalyst, nitrogen After the replacement, adjust the temperature of the kettle to 140°C, start electromagnetic stirring, inject 60g of epichlorohydrin after 2 hours, react for 10 hours, remove unreacted monomers and condensation products under reduced pressure, and record the weight of the obtained polymer after discharging . A polyether ester trihydric alcohol with a hydroxyl value of 66 was obtained with a yield of 100%.

Embodiment 3

[0024] In dry 1-liter autoclave, add 100g polycyclopropane ether tetrahydric alcohol (hydroxyl value 160), 60g succinic anhydride and 0.05g zinc hexacyanocobaltate ethylene glycol diethyl ether double metal complex catalyst, after nitrogen replacement, Adjust the temperature of the kettle to 160°C, start electromagnetic stirring, inject 20g of propylene oxide and 40g of ethylene oxide after 2 hours, react for 24 hours, remove unreacted monomers and condensation products under reduced pressure, and record the obtained polymer after discharging of weight. A polyether ester tetraol with a hydroxyl value of 80 was obtained with a yield of 95%.

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Abstract

A process for preparing polyether polyol includes such steps as proportionally adding micromolecular polyether, cyclic acid anhydride and catalyst to high-pressure reactor, vacuumizing, filling N2, heating to 50-200 deg.c, adding epoxy compound and polymerizing. Its advantage is high transform rate.

Description

Technical field: [0001] The invention belongs to a preparation method of polyether ester polyol, in particular to a preparation method of polyether ester polyol used for preparing polyurethane. Background technique: [0002] Polyurethane material is a new type of high polymer with unique properties and multiple uses. It is widely used in polyurethane foam plastics, rubber, coatings, adhesives, synthetic fibers, synthetic leather, waterproof grouting materials, etc. due to its excellent properties. in industry. Polyurethane is formed by polyaddition of diisocyanate and polyol as basic raw materials. Polyol compounds include polyester type and polyether type. Polyester type polyurethane products have better strength, wear resistance, tear resistance and oil resistance. , but its hydrolysis resistance and low temperature resistance are relatively inferior, and there are many processing steps. Polyether polyurethane has excellent hydrolysis resistance, mold resistance, flex re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26
Inventor 王心葵亢茂青王东贤瞿波
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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