Preparing method for high hydroxyl value plant oil polyhydric alcohol

A technology of vegetable oil polyol and vegetable oil, which is applied in the field of preparation of high hydroxyl value vegetable oil polyol, can solve the problems of poor foam dimensional stability, low functionality, and few active points, and achieve easy after-treatment, high hydroxyl value, Good dimensional stability

Inactive Publication Date: 2009-08-19
鹏欣环球资源股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is directly prepared from vegetable oil, but the vegetable oil polyol prepared by this method has the disadvantages of low functionality and few active points, so the addition of the polyol generally needs to be controlled at 30% to 50% when preparing rigid polyurethane foam. Too much will result in poor dimensional stability of the foam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] soybean oil 500g

[0036] Epoxidized soybean oil 400g

[0037] Diethanolamine 120g

[0038] Triethanolamine 140g

[0039] Glycerin 100g

[0040] Pentaerythritol 15g

[0041] water 10g

[0042] KOH 8g

[0043] Feed the above components, in N 2 Under protection, the temperature was raised to 120° C. for 60 minutes. Close N 2, evacuated, heated to 160°C, and kept at 160°C for 6 hours. After cooling, about 1250g of the product is obtained. The hydroxyl value of the product is 500mgKOH / g, and the viscosity is 12000mPa·s.

Embodiment 2

[0045] Epoxidized soybean oil 800g

[0046] Diethanolamine 100g

[0047] Diethylene glycol 100g

[0048] Glycerin 30g

[0049] Ethylene glycol 10g

[0050] water 10g

[0051] KOH 10g

[0052] Feed the above components, in N 2 Under protection, the temperature was raised to 135° C. for 60 minutes. Close N 2 , evacuated, 5-100mmHg, heated to 160°C, and kept at 160°C for 3 hours. After cooling, about 1180g of the product is obtained. The hydroxyl value of the product is 430mgKOH / g, and the viscosity is 6000mPa·s.

Embodiment 3

[0054] Palm oil 500g

[0055] Epoxidized soybean oil 500g

[0056] Diethanolamine 100g

[0057] Diethylene glycol 250g

[0058] water 15g

[0059] Sodium hydroxide 6g

[0060] Feed the above components, blow nitrogen, raise the temperature to 110°C, and react for 90 minutes. Turn off nitrogen, heat up to 180°C, vacuumize, and keep warm at 180°C for 5 hours. After cooling, about 1250g of the product was obtained. The hydroxyl value of the product is 280mgKOH / g, and the viscosity is 5000mPa·s.

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PUM

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Abstract

The present invention relates to a preparation method of vegetable oil polyol with high hydroxyl value, which mainly utilizes epoxy vegetable oil, more preferably a mixture of vegetable oil and epoxy vegetable oil, to react with fatty amine and / or alcohol to prepare vegetable oil polyol with high hydroxyl value and low viscosity . The prepared vegetable oil polyol can be used to prepare various polyurethane rigid foam materials and elastomer materials. The vegetable oil polyol has the advantages of high hydroxyl value, high functionality, low viscosity, reasonable molecular structure and the like.

Description

technical field [0001] The invention relates to a method for preparing high-hydroxyl vegetable oil polyols. The prepared vegetable oil polyols can be used to prepare various polyurethane rigid foam materials and elastomer materials. The vegetable oil polyol has the advantages of high hydroxyl value, high functionality, low viscosity, reasonable molecular structure and the like. Background technique [0002] Polyurethane rigid foam is widely used to prepare thermal insulation and building energy-saving materials. Due to the non-renewability of petroleum resources, people began to use vegetable oil as raw material to replace the original petroleum raw material to prepare polyols for polyurethane. Vegetable oil polyols can be widely used in foams, coatings, elastomers and other fields. Compared with petroleum-based polyurethane materials, the use of vegetable oil to prepare rigid foam has many advantages, such as: the source of raw materials is extensive and renewable; the pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/10C07C31/18
Inventor 钟华亮汤小群张旭琴
Owner 鹏欣环球资源股份有限公司
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