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Fatty polyol dimer and its prepn process and application in foamed polyurethane plastic

A technology of dimerization of fatty acid methyl ester and dimerization of fatty acid, applied in the field of organic polymer compounds, can solve the problems of heat resistance, strength and tear resistance that cannot meet the requirements of technological development, and achieve good thermal insulation and good resistance. Thermal performance, good strength effect

Inactive Publication Date: 2007-11-07
JIANGSU QIANGLIN BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the use of existing polyester polyols in polyurethane products, the heat resistance, strength, and tear resistance of the products cannot meet the requirements of technological development.

Method used

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  • Fatty polyol dimer and its prepn process and application in foamed polyurethane plastic
  • Fatty polyol dimer and its prepn process and application in foamed polyurethane plastic
  • Fatty polyol dimer and its prepn process and application in foamed polyurethane plastic

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Experimental program
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Effect test

Embodiment 1

[0023] A dimer fatty acid polyol has the following chemical structural formula:

[0024]

[0025] Among them, n1=1~12;

[0026] n2=1~10;

[0027] R =

[0028]

[0029] A method for preparing dimerized fatty acid polyols. The preparation steps are as follows: alcoholysis of fresh or discarded vegetable oils by conventional techniques to obtain fatty acid methyl esters, alcoholysis of oils and recovered oils:

[0030]

[0031] The fatty acid methyl ester obtained in the previous step is thermally polymerized through conventional techniques, and the fatty acid monoester with low boiling point is removed by distillation to obtain dimer fatty acid methyl ester (more than 95% in purity), and fatty acid thermal polymerization reaction:

[0032]

[0033]Add the dimerized fatty acid methyl ester to the polyol, wherein the mass ratio of the dimerized fatty acid methyl ester to the polyol is 1:1 to 4, and simultaneously add 0.1 to 3% zinc oxide of the dimerized fatt...

Embodiment 2

[0035] Preparation of dimerized fatty acid polyol: Add the obtained dimerized fatty acid methyl ester into ethylene glycol, glycerin, pentaerythritol, diethylene glycol, triethylene glycol, etc., take one or more of them and mix them. The amount is 1:1-4 parts by mass, while adding zinc oxide of 0.1-3% by mass of dimer fatty acid methyl ester, heating at 100-220°C for transesterification reaction, during the reaction process, the methanol generated by the reaction is continuously distilled out, 2 When no methanol is distilled after -5 hours, the reaction is stopped, and the excess alcohol in the reactant is recovered by distillation under reduced pressure at 100-200° C. / 10-30 mmHg to obtain a dimerized fatty acid polyol. Sampling analysis shows that the hydroxyl value is 350-600KOHmg / g; the viscosity (25°C) is 400-2000mpa.s.

Embodiment 3

[0037] The preparation of dimerized fatty acid polyol: add the obtained dimerized fatty acid methyl ester to ethylene glycol, the amount added is 1: 1 mass parts, add the zinc oxide of dimerized fatty acid methyl ester quality 0.1% at the same time, carry out heating at 170 ℃ During the transesterification reaction, the methanol produced by the reaction is continuously distilled out. When no methanol is distilled out after 2 hours, the reaction is stopped, and the excess alcohol in the reactant is recovered by distillation under reduced pressure at 100°C / 30mmHg to obtain dimer fatty acid Polyol. Sampling analysis shows that the hydroxyl value is 500KOHmg / g; the viscosity (25°C) is 2000mpa.s.

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Abstract

The present invention relates to organic high molecular compound and its preparation, chemical preparing and complex. The present invention provides one kind of fatty polyol dimer originated from biomass resource and its preparation process in polyurethane foam for raising the heat resistance, strength and tearing resistance.

Description

1. Technical field [0001] The invention belongs to organic macromolecule compound; its preparation or chemical processing; its composition as a base material, in particular to a dimerized fatty acid polyol, its preparation method and its application in polyurethane foam plastics. 2. Background technology [0002] Existing technology: As we all know, the raw materials used in the chemical industry are all taken from petroleum resources at present, facing the shortage of petroleum and rising prices, and biomass resources are the only inexhaustible resources. Fatty acid is one of the most abundant biomass resources. Among many synthetic materials, polyurethane soft and hard foam and other polyurethane products are one of the fastest growing industries in the modern plastics industry, because of their good thermal insulation, electrical properties, acoustic properties and chemical resistance, and have excellent strength, Tear resistance is widely used in home appliances, petroc...

Claims

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Application Information

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IPC IPC(8): C07C69/34C07C67/08C08G18/48C08G18/24C08G101/00
Inventor 蒋剑春周永红刘红军李书龙张猛
Owner JIANGSU QIANGLIN BIO ENERGY
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