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Biomass polyurethane foam and method for preparing same

A technology based on polyurethane and biomass, applied in the field of preparation of biomass-based polyurethane foam, can solve the problems of poor bonding performance with polyurethane, unrealizable, low reactivity, etc., and achieve the effect of low modification temperature

Inactive Publication Date: 2013-09-04
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reactivity of lignosulfonic acid or its partially neutralized salt in this method is low, and its hydroxyl group cannot fully polymerize with polyisocyanate, and most of the lignin components can only exist in the final form as fillers. In the prepared polyurethane, therefore, on the one hand, the purpose of replacing petroleum-based polyols with lignin components cannot be realized; Poor combination with polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0011] The preparation method of described biomass-based polyurethane foam provided by the invention comprises the following steps:

[0012] (1) At 100-135° C., the straw lignin material, polyol and acid catalyst are subjected to a first contact reaction for 1-4 hours, and then starch is added to perform a second contact reaction to obtain a modified lignin product;

[0013] (2) Mix the modified lignin, polyether polyol, amine catalyst and blowing agent evenly, then add isocyanate to carry out the third contact reaction according to the isocyanate index of 1-1.4, and the third contact reaction The resulting product was cured.

[0014] In the present invention, the term "isocyanate index" refers to the ratio of isocyanate equivalents to polyol equivalents, indicating the degree of excess isocyanate in the polyurethane formulation, and the isocyanate equivalents refer to the moles of isocyanate in isocyanate, The polyol equivalents refer to the number of moles of alcoholic hydr...

Embodiment 1

[0035] This example is used to illustrate the biomass-based polyurethane foam provided by the present invention and its preparation method.

[0036] (1) Preparation of modified lignin

[0037] 100 parts by weight of corn stalks (particle size of 80-120 mesh), 110 parts by weight of polyethylene glycol (PEG400), 30 parts by weight of glycerol and 1.5 parts by weight of sulfuric acid (98% concentrated sulfuric acid) were mixed, and The reaction was carried out at 120° C. for 2 hours. Then, 100 parts by weight of potato starch (with a particle size of 80-120 mesh) was added to the reaction mixture, and stirred and reacted at 80° C. for 0.8 hour to obtain a modified lignin product.

[0038] (2) Preparation of bio-based polyurethane foam

[0039] Under stirring, the modified lignin prepared in (1) of 100 parts by weight, the polyether polyol of 150 parts by weight (polyether polyol 4110 purchased from Beijing Bailing Qingyue Polyurethane Factory), 5 parts by weight of Triethylen...

Embodiment 2

[0045] This example is used to illustrate the biomass-based polyurethane foam provided by the present invention and its preparation method.

[0046] Biomass-based polyurethane foam was prepared according to the method of Example 1, except that in step (1), an equal weight of ethylene glycol was used instead of glycerol to prepare lignin modified products. Biomass-based polyurethane foam A2 was thus prepared.

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PUM

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Abstract

The invention discloses a biomass polyurethane foam and a method for preparing the same, wherein the method comprises the following steps that: (1) under 100-135 DEG C, straw lignin material, polyalcohol and acid catalyst are subjected to first contact reaction for 1-4 hours, then starch is added for carrying out second contact reaction, so modified lignin is obtained; and (2) the modified lignin, polyether polyol, amine catalyst and foaming agent are uniformly mixed, then isocyanate is added for carrying out third contact reaction according to the isocyanate index of 1-1.4, and the product which is obtained from the third contact reaction is solidified. The polyurethane foam which is prepared by the method has excellent mechanical property.

Description

technical field [0001] The invention relates to a preparation method of biomass-based polyurethane foam and the biomass-based polyurethane foam prepared by the method. Background technique [0002] As people's awareness of the environmental crisis and resource crisis continues to deepen, the development of new natural polymer materials such as lignin and starch has been paid more and more attention. Lignin and starch belong to natural polymer compounds, which are huge reserves and renewable organic resources, and widely exist in plants. Due to its low price and superior performance, polyurethane has become one of the fastest-growing varieties in the modern polymer industry. Since lignin and starch have multiple functional groups such as hydroxyl groups, they can replace petroleum-based chemicals (such as petroleum-based polyols) after development, and become an important source of organic compounds for the synthesis of polymer materials such as polyurethane. [0003] Discl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/64C08G18/48C08H7/00C08G101/00
Inventor 韩雁明储富祥秦特夫邹献武李燕刘姝君
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY