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Preparation method of lactide modified polyether polyol

A polyether polyol and lactide technology is applied in the field of preparation of lactide-modified polyether polyol and can solve the problems of long polymerization time and low catalyst activity.

Active Publication Date: 2017-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is the problem of long polymerization time due to low catalyst activity during the preparation of lactide-modified polyether polyols

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Preparation of double metal cyanide complex catalyst

[0038] 8 g of potassium hexacyanocobaltate was dissolved in 140 ml of distilled water. Slowly add 38.5% (weight) of ZnCl at 8000 rpm 2 65 grams of aqueous solution, then add a mixture of 100 milliliters of tert-butanol and 100 milliliters of distilled water, stir for 20 minutes, add 14.7 grams of dimethyl phthalate and 200 milliliters of distilled water, stir for 10 minutes, then vacuum filter with a sand core funnel . Add 150 milliliters of tert-butanol and 60 milliliters of distilled water to the obtained solid, stir at a speed of 8000 rpm for 10 minutes, then add 10.6 grams of dimethyl phthalate, stir for 10 minutes, and centrifuge. Add 200 ml of tert-butanol to the obtained solid, stir at 8000 rpm for 10 minutes, then add 6.7 g of dimethyl phthalate, stir for 10 minutes, and centrifuge. The solid was vacuum-dried at 60°C until constant weight to obtain 12.9 g of solid powder catalyst I.

[0039] After ana...

Embodiment 2

[0044] 1. Preparation of double metal cyanide complex catalyst

[0045] With embodiment 1.

[0046] 2. Preparation of copolymer

[0047] 30g starter polyoxypropylene trihydric alcohol (M n 500) and 0.0072g of the above-mentioned catalyst I were added to a pressure-resistant reactor equipped with a stirring paddle, and after the reactor was alternately replaced with vacuum and nitrogen for 3 to 5 times, after the temperature was raised to 105°C, 20g of propylene oxide was added to pre- After activation, the pressure in the reactor decreased significantly after 15 minutes. First, 170g of a mixture consisting of 134g of propylene oxide and 36g of L-lactide was continuously added to the reactor. After this step was completed, 20g of epoxy resin was continuously added. Propane is used for 2 hours, the reaction temperature is controlled at 135-140°C, and the reaction pressure is lower than 1MPa. After the feeding is completed, continue to stir and mature for 1 hour. In the presen...

Embodiment 3

[0049] 1. Preparation of double metal cyanide complex catalyst

[0050] With embodiment 1.

[0051] 2. Preparation of copolymer

[0052] 30g starter polyoxypropylene trihydric alcohol (M n 500), 75g of L-type lactide and 0.009g of the above-mentioned catalyst I were added to a pressure-resistant reactor equipped with a stirring paddle, and the reactor was alternately replaced with vacuum and nitrogen for 3 to 5 times. After the temperature was raised to 105°C, epoxy Propane 20g, the catalyst is pre-activated, the pressure in the reactor drops significantly after 25 minutes, the remaining 175g propylene oxide is continuously added to the reactor within 2 hours, the reaction temperature is controlled at 140-145°C, and the reaction pressure is low At 1MPa, continue to stir and mature for 1 hour after the addition is complete. The consumption of DMC catalyst is 30ppm in the present embodiment, and reaction time is 180 minutes. The number average molecular weight M of the polym...

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PUM

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Abstract

The invention relates to a preparation method of lactide-modified polyether polyol, which mainly solves the technical problem of long polymerization time in the preparation process of lactide-modified polyether polyol, by adopting the preparation method of lactide-modified polyether polyol , including the use of double metal cyanide complex catalysts, with active hydrogen atom-containing compounds as initiators, ring-opening copolymerization of olefin oxide and lactide; wherein the double metal cyanide complex catalysts contain The following components: a) 40-99.8 parts of double metal cyanide mixture; b) 0.1-30 parts of C4-C10 tertiary alcohol technical solution, which solves the technical problem well and can be used for lactide modified poly In the industrial production of ether polyols.

Description

technical field [0001] The invention relates to a preparation method of lactide-modified polyether polyol. Background technique [0002] Polyurethane material has developed rapidly due to its superior performance and simple molding and processing. It has become one of the most important synthetic materials in the world. agriculture and many other fields. However, its raw materials come from limited fossil resources such as petroleum, and its waste is difficult to decompose in the natural environment, and it is difficult to recycle. Incineration will release a large amount of combustion heat and harmful gases, polluting the environment, and burying it will occupy a large amount of land resources. . In response to this environmental problem, the development of degradable polyurethane materials has become a hot spot. [0003] Polyether polyol is one of the main raw materials for the synthesis of polyurethane. It is widely used in the preparation of polyurethane foam, elastom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26C08G63/664C08G63/83C08G63/82
Inventor 王巍金晖张志华贾钦
Owner CHINA PETROLEUM & CHEM CORP
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