Tung oil-based polyol and preparation method thereof

A technology of polyol and tung oil, which is applied in the field of polyurethane materials, can solve the problems of prone to side reactions, high reactivity of epoxy groups, and increased viscosity, so as to avoid cross-linking side reactions, good biodegradability, and improve reaction active effect

Active Publication Date: 2016-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, tung oil is used to prepare high-quality vegetable oil polyols. Because tung oil has a high degree of unsaturation and is the only unsaturated vegetable oil with conjugated double bonds in nature, the iodine value reaches more than 170, and more than 85% of the unsaturated bonds are Carbon-carbon conjugated triene bonds, so the presence of conjugated double bonds in tung oil in the process of preparing polyol epoxidation makes the epoxy group highly reactive, poor in selectivity, and prone to side reactions, thereby generating macromolecular cross-links. Co-product, resulting in a sh...

Method used

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  • Tung oil-based polyol and preparation method thereof
  • Tung oil-based polyol and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 500g tung oil, 0.5g organomolybdenum metal complex, and 300g butanol into a 2000mL three-neck flask, heat up to 60°C and stir evenly. Then, 750g of 30wt% hydrogen peroxide aqueous solution was slowly added dropwise under vigorous stirring, and the dropping rate was controlled to keep the reaction temperature at about 80°C. The solid organic molybdenum metal complex catalyst was separated by filtration, and after the reaction system was separated, the water phase was removed, and the oil phase was distilled at 2000 Pa and 80 °C for 2 hours to obtain the tung oil-based polyol product with a yield of 93.5%. , the product has a hydroxyl value of 241mgKOH / g, a viscosity of 7900mPa·s, an acid value of 0.47mgKOH / g, and a moisture content of less than 0.1wt%. It can be used to prepare rigid polyurethane foam products.

Embodiment 2

[0024] Add 500g tung oil, 0.5g organomolybdenum metal complex, and 300g butanol into a 2000mL three-neck flask, heat up to 70°C and stir evenly. Then slowly add 750g of 30wt% hydrogen peroxide solution dropwise under vigorous stirring conditions, and control the rate of addition to keep the reaction temperature at about 90°C. The solid organic molybdenum metal complex catalyst was separated by filtration, and after the reaction system was separated, the water phase was removed, and the oil phase was distilled at 2000 Pa and 80 °C for 2 hours to obtain the tung oil-based polyol product with a yield of 93.3%. , the product has a hydroxyl value of 232mgKOH / g, a viscosity of 8600mPa·s, an acid value of 0.48mgKOH / g, and a moisture content of less than 0.1wt%. It can be used to prepare rigid polyurethane foam products.

Embodiment 3

[0026]Add 500g tung oil, 0.5g organomolybdenum metal complex, and 300g butanol into a 2000mL three-neck flask, heat up to 50°C and stir evenly. Then slowly add 750g of 30wt% hydrogen peroxide solution dropwise under vigorous stirring conditions, and control the dropping rate to keep the reaction temperature at about 70°C. The solid organic molybdenum metal complex catalyst was separated by filtration, and after the reaction system was separated, the water phase was removed, and the oil phase was distilled at 2000 Pa and 80 °C for 2 hours to obtain the tung oil-based polyol product with a yield of 92.6%. , the product has a hydroxyl value of 176mgKOH / g, a viscosity of 6900mPa·s, an acid value of 0.42mgKOH / g, and a moisture content of less than 0.1wt%. It can be used to prepare rigid polyurethane foam products.

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Abstract

The invention discloses a tung oil-based polyol and a preparation method thereof. The preparation method comprises following steps: tung oil, an organic metal complex catalyst, and a hydroxylation reagent are mixed at a certain ratio, and are heated to 50 to 70 DEG C; under violent stirring, a hydrogen peroxide solution is added dropwise, adding speed is controlled so as to maintain the reaction temperature to be 70 to 90 DEG C, after adding of the hydrogen peroxide solution, reaction temperature is maintained for 3 to 5, and reaction is stopped; an obtained reaction system is subjected to filtering so as to separate the solid catalyst, is allowed to stand for layering so as to separate a water phase, and is subjected to reduced pressure distillation so as to obtain the tung oil-based polyol. The yield of the tung oil-based polyol is higher than 92%; product hydroxyl value ranges from 120 to 270mgKOH/g; acid value is lower than 1.0mgKOH/g; water content is lower than 0.1wt%; and the tung oil-based polyol can be used for preparing polyurethane materials.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and in particular relates to a tung oil-based polyol and a preparation method. Background technique [0002] Polyurethane materials have been widely used in industry and people's daily life due to their good mechanical properties and easy molding. The main raw materials used to produce polyurethane include isocyanates, polyols and other additives, of which polyols account for more than 50%. In the process of industrial production, polyols are mainly used in the field of polyurethane, so the factors affecting the polyurethane industry are also the main factors affecting the polyol market. Polyols can be divided into polyether polyols and polyester polyols according to their molecular structure. Among them, polyether polyols dominate the market, accounting for more than 70% of the entire polyol demand. [0003] Typically, polyols are prepared from petroleum. As a non-renewable resource, the...

Claims

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Application Information

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IPC IPC(8): C07C69/675C07C67/31C08G18/36
Inventor 李澜鹏白富栋李政王艳乔凯王领民
Owner CHINA PETROLEUM & CHEM CORP
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