Rigid polyurethane foam prepared by using rape seed oil

A technology of rigid polyurethane and foam plastics, applied in the field of rigid polyurethane foam plastics

Inactive Publication Date: 2007-10-10
HONGBAOLI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the existing rigid polyurethane foam relies on petroleum as a raw material. Instead, vegetable oil is used for technical deep processing to synthesize bio-based polyols, and then bio-based polyols are used to prepare rigid polyurethane foams with better performance. quality polyurethane foam

Method used

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  • Rigid polyurethane foam prepared by using rape seed oil
  • Rigid polyurethane foam prepared by using rape seed oil
  • Rigid polyurethane foam prepared by using rape seed oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Add 1000g of refined rapeseed oil, 211g of glycerol, and 1.1g of potassium hydroxide into a 2L glass kettle, stir, heat up to 120-240°C, and carry out alcoholysis reaction for 5 hours. Leave it on for 3-6 hours. Cool down to 75°C, add 3.6g of 50% phosphoric acid, keep for 30 minutes, add 250g of water, stir for 15 minutes, separate after standing, add 250g of water, stir for 15 minutes, separate after standing, and obtain mixed unsaturated fatty acid monoester 1015g.

Embodiment 2

[0088] Get mixed unsaturated fatty acid monoester 1185g and 250 grams of formic acid (80%), 60 grams of acid clay in the above-mentioned embodiment 1 and add in the glass kettle of 2L, stir, add dropwise the 37% hydrogen peroxide of 376 grams, at 30 ~ React at 70°C for 6-10 hours, separate the upper layer after standing still; control the temperature of the upper layer mixed epoxy fatty acid monoester at 70-80°C, wash with 5% sodium carbonate twice, then wash with saturated brine and soft water Each 2 times, finally remove water with the method of underpressure distillation, obtain mixed epoxy fatty acid monoester, detect its epoxy value 4.50%.

Embodiment 3

[0090] Mix the product in Example 2 with 1245 g of epoxy fatty acid monoester, add 420 g of diethylene glycol, and 4.2 g of potassium hydroxide, add it to a 2L glass kettle, stir and heat up, and control the reaction temperature at 65 to 170° C., and the reaction time is 5 ~9 hours. Afterwards, it is refined, and the specific method is as follows: add 13.7g of 50% phosphoric acid for neutralization for 15 minutes, add 2g of magnesium silicate for adsorption, and then dehydrate for 60 minutes at a vacuum degree of 100-750KPa and a temperature of 80-120°C, and filter Finally, the refined bio-based polyol A of product 1400g was obtained, and the hydroxyl value was 475mgKOH / g.

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Abstract

This invention is preparation method of rigid polyurethane foam plastics with rape oil. The procedure is as followings: 1) adds alcohol to alcoholysis with the precence of rape oil and catalysis, obtain mixed unsaturated fatty acid monoester. 2) Add epoxidation agent to get mixed epoxidated fatty acid ester. 3) React with nucleophilic reagent to get mixed hydroxy fatty acid monoesters-biological polyatomic alcohol. 4) Mix with auxiliary catalysis, foam stabilizer and water to form polyether polyol. 5) Mix with foaming agent and isocyanate to obtain rigid polyurethane foam plastics. This invention has a high compatibility with alkane foaming and low cost. It's a good heat insulating material.

Description

technical field [0001] The invention relates to a rigid polyurethane foam prepared from rapeseed oil, which belongs to the field of polyurethane synthetic materials. Background technique [0002] Rigid polyurethane foam is widely used in household refrigerators, freezers, building insulation and pipeline industries due to its excellent thermal insulation performance, good plasticity and processing performance. It is a foam product formed by combining polyether (ester) polyol, foaming agent and isocyanate through chemical reaction under the action of a catalyst. Among them, polyether (ester) polyol is the main raw material for preparing polyurethane foam. [0003] With the rapid development of the global economy, the global demand for all polyols including the above-mentioned polyether (ester) polyols is growing rapidly. However, the existing polyols are all downstream products of petroleum, and due to the shortage of petroleum resources, the prices of these products are re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G101/00
Inventor 芮敬功邢益辉罗振扬姚志洪韦华袁海顺
Owner HONGBAOLI GRP CO LTD
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