Method for preparing polyurethane foam by using jatropha curcas oil-based soft polyether

A technology of jatropha oil and polyurethane soft foam, applied in the field of molecular polymerization, can solve the problem of high price, achieve low cost, reduce cost, and facilitate the purchase of raw materials

Inactive Publication Date: 2011-11-23
JIANGSU LVYUAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above products are all by-products of petroleum. Due to the shortage of petroleum resources, the prices of these products are relatively high.

Method used

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  • Method for preparing polyurethane foam by using jatropha curcas oil-based soft polyether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add jatropha oil 500g, 80% formic acid 68g in the glass kettle of 1L, stir 10 minutes, dropwise add 30% hydrogen peroxide 230g, the mol ratio of hydrogen peroxide to soybean oil is 3.7, catalyst formic acid is to the ratio of jatropha oil The molar ratio is 2.2, react at 50-55°C for 6 hours, raise the temperature to 100-110°C, reflux for 6 hours, stand still and separate the acid water, wash twice, reduce the pressure and vacuum until the water content is less than 0.10%, and obtain hydroxylated vegetable oil , the hydroxyl value of the product is detected to be 226mgKOH / g, and this product is hydroxy A.

Embodiment 2

[0025] Add jatropha oil 500g, 80% formic acid 60g in a 1L glass kettle, stir for 10 minutes, add dropwise 30% hydrogen peroxide 210g, the mol ratio of hydrogen peroxide to jatropha oil is 3.4, catalyst formic acid can oxidize The molar ratio of the double bond equivalent is 1.9, react at 40-50°C for 5 hours, raise the temperature to 100-105°C, reflux for 4 hours, stand and separate the acid water by layering, wash twice, reduce the pressure and vacuum until the moisture is less than 0.10%, Obtain hydroxylated vegetable oil, detect the hydroxyl value of product 207mgKOH / g, this product is hydroxy B.

Embodiment 3

[0027] In the glass kettle of 1L, add jatropha oil 500g, with 80% formic acid 65g, drip the hydrogen peroxide 240g of 30%, the mol ratio of hydrogen peroxide to jatropha oil is 3.9, the mol ratio of catalyzer formic acid to jatropha oil The ratio is 2.3, react at 48-55°C for 7 hours, raise the temperature to 100-110°C, reflux for 5 hours, stand and separate the acid water by layering, wash with water twice, decompress and vacuum until the water content is less than 0.10%, and get Hydroxylated vegetable oil, the hydroxyl value of the product is detected to be 236mgKOH / g, and this product is hydroxy C.

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Abstract

The invention discloses a method for preparing polyurethane foam by using jatropha curcas oil-based soft polyether, which comprises: hydroxylating jatropha curcas oil; and reacting the product of the hydroxylation with an epoxide to synthesize the soft foam polyether polyol of which the hydroxyl value is 52 to 60 mg KOH / g. The soft polyurethane foam can be prepared by stirring and mixing the jatropha curcas oil-based soft polyether, a polyether(ester) polyol, a catalyst, a foam stabilizer, water and isocyanate according to a certain mixing ratio. Polyurethane hard foam prepared from the jatropha curcas oil-containing biobased polyether polyol is mainly used in fields of pipe thermal insulation, refrigerators, freezers, building thermal insulation, plates, cushioning materials, solar, indoor decoration and the like.

Description

technical field [0001] The invention relates to a molecular polymerization method, in particular to a method for preparing polyurethane foam with a jatropha oil-based soft foam polyether. Background technique [0002] The existing technologies are: [0003] 1. Transesterification of vegetable oil and small molecule alcohol into hard foam vegetable oil polyether polyol; [0004] This technology can produce vegetable oil hard foam polyether polyols with a hydroxyl value of 180-700mgKOH / g, that is, a molecular weight of about 300-600, but the application range is very narrow, and only about 10% can be added, and it cannot be used in the insulation layer of refrigerators. used in polyurethane foam. [0005] 2. Vegetable oil is hydroxylated and polymerized with propylene oxide to obtain polyether polyol; [0006] This technology is relatively complicated, and the hydrogen peroxide process is relatively polluting, and the cost is relatively high, and there is no competitive adv...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G65/28C08J9/08C08G101/00
Inventor 王夏春虞兴东
Owner JIANGSU LVYUAN NEW MATERIALS
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