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Preparation method of novel vegetable oil polyol for polyurethane rigid foam

A polyurethane rigid foam and vegetable oil technology, which is applied in the preparation of organic compounds, carboxylic acid ester preparation, chemical instruments and methods, etc., can solve the problems of hindering large-scale application, high cost of industrialization, high equipment requirements, etc., and achieve hydroxyl functionality Controllable, reasonable molecular structure, and improved hydrophobic performance

Active Publication Date: 2013-03-27
WANHUA CHEM NINGBO RONGWEI POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction process is long, the equipment requirements are high, special catalysts are needed, and the industrialization cost is high
Because of the high pressure required, the current technical conditions cannot be achieved, thus hindering its large-scale application in industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] soybean oil 100g

[0044] Maleic anhydride 30g

[0045] Glycerin 60g

[0046] Sorbitol 40g

[0047] Triethanolamine 30g

[0048] KOH0.5g

[0049] Put soybean oil and maleic anhydride into the reactor, under the protection of nitrogen, raise the temperature to 210°C for 180 minutes, cool down to room temperature, add glycerin, sorbitol, triethanolamine and KOH, raise the temperature to 230°C for 6 hours, cool The obtained product has a hydroxyl value of 500 mgKOH / g and a viscosity of 20000 mPa·s. The product is stored at room temperature for 6 months without precipitation and stratification.

Embodiment 2

[0051] Peanut oil 100g

[0052] Maleic anhydride 50g

[0053] Diethylene glycol 40g

[0054] Trimethylolpropane 60g

[0055] KOH0.3g

[0056] Put peanut oil and maleic anhydride into the reaction kettle, under the protection of nitrogen, raise the temperature to 180°C for 360 minutes, cool down to room temperature, add diethylene glycol, trimethylolpropane and KOH, raise the temperature to 220°C for 12 hours, After cooling, the product is obtained. The hydroxyl value of the product is 480 mgKOH / g, and the viscosity is 12000 mPa·s. The product is stored at room temperature for 6 months without precipitation and stratification.

Embodiment 3

[0058] Palm oil 100g

[0059] Maleic anhydride 20g

[0060] Glycerin 60g

[0061] KOH 0.2g

[0062] Put palm oil and maleic anhydride into the reactor, under the protection of nitrogen, raise the temperature to 240°C for 540 minutes, cool down to room temperature, add glycerin and KOH, raise the temperature to 240°C and keep it for 8 hours, cool to get the product, the product The hydroxyl value is 400mgKOH / g, the viscosity is 2000mPa·s, and the product is stored at room temperature for 6 months without precipitation and stratification.

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Abstract

The invention relates to a method for preparing polyol for polyurethane rigid foam from vegetable oil. Raw materials used in the method mainly comprise the following components: 100 parts by mass of vegetable oil, 5-85 parts by mass of modifier, 10-200 parts by mass of small molecular polyol and / or polyamine compounds, and 0-5000ppm of base catalyst based on the total mass of the vegetable oil, the modifier and the small molecular polyol or the polyamine compounds. The method mainly comprises the following reaction steps: (1) under the protection of inert gases, carrying out modification reaction on the vegetable oil by using the modifier; and (2) under the protection of inert gases, adding the small molecular polyol or the polyamine compounds and the base catalyst for carrying out reaction to prepare vegetable oil based polyol. The polyol prepared by the method of the invention has the advantages of good storage stability, high functionality and the like and can be widely applied to production of polyurethane rigid foam.

Description

technical field [0001] The present invention relates to a kind of preparation method of polyol for polyurethane rigid foam, more specifically, the present invention relates to a kind of method of using vegetable oil to prepare polyol for polyurethane rigid foam. Background technique [0002] Polyurethane rigid foam is widely used in the field of building energy-saving and thermal insulation. Due to the advantages of environmental protection, regeneration and price, domestic and foreign scholars continue to use vegetable oil as raw material to develop vegetable oil polyols to replace traditional petroleum-based polyols. Among the currently known vegetable oils, except castor oil containing hydroxyl groups, the others do not contain hydroxyl groups. Therefore, the development of vegetable oil polyols is mainly to modify the structure of vegetable oils and introduce a large number of hydroxyl groups into the molecular chains of vegetable oils. [0003] The main component of veg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/31C07C69/732C07C69/675C08G18/67
Inventor 石磊王景存韩怀强曹庆龙
Owner WANHUA CHEM NINGBO RONGWEI POLYURETHANE
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