Preparation method for lactide modified polyether polyol

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

Active Publication Date: 2016-01-13
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 propylene oxide was continuously added. , it takes 2 hours, the reaction temperature is controlled at 135-140° C., the reaction pressure is lower than 1 MPa, and the stirring and aging are continued for 1 hour after the feeding is completed. In the ...

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 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 after the reactor was alternately replaced with vacuum and nitrogen for 3 to 5 times, after the temperature was raised to 105°C, propylene oxide was added 20g, the catalyst was preactivated, and the pressure in the reactor dropped significantly after 25 minutes, and the remaining 175g of propylene oxide was continuously added to the reactor within 2 hours, the reaction temperature was controlled at 140-145°C, and the reaction pressure was lower than 1MPa, continue to stir and mature for 1 hour after the addition is completed. The consumption of DMC catalyst is 30ppm in the present embodiment, and reaction time is 180 minutes. The number ave...

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PUM

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Abstract

The present invention relates to a preparation method for lactide modified polyether polyol. In order to solve the technical problem of long polymerization time in a preparation process of a lactide modified polyether polyol, the preparation method for the lactide modified polyalcohol comprises: enabling oxyalkylene and lactide to carry out ring-opening copolymerization by taking a double-metal cyanide complex as a catalyst and taking a compound containing an active hydrogen atom as an initiator, wherein the double-metal cyanide complex catalyst comprises the following components in parts by weight: a) 40-99.8 parts of a double-metal cyanide mixture; and b) 0.1-30 parts of C4-C10 tertiary alcohol. The technical scheme solves the technical problem well, and can be used for industrial production of the lactide modified polyether polyol.

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 Applications(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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