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Composite material and itd preparation method

A composite material and polyester polyol technology, applied in the field of polymer material science and polymer chemistry, to achieve good mechanical properties and water resistance, improve processability, and high technological content

Inactive Publication Date: 2003-12-24
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soybean flour is the material after soybean oil extraction, and soybean dregs are the residue after soybean protein is extracted from soybean flour by alkali dissolution method. They are used as raw materials to react with polyether polyol or polyester polyol and diisocyanate through chemical reaction and heat treatment. There is no report on the preparation of composite materials by pressing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mix dry polypropylene glycol and freshly steamed 2,4-toluene diisocyanate in a three-necked flask at a molar ratio of 1:2, heat to 85°C with stirring, then keep warm and steam for 2.5 hours to obtain isocyanate-terminated polyurethane prepolymer. The polyurethane prepolymer is mixed with the dried soybean dregs at a mass ratio of 4:6, and is extruded by a screw machine for reaction. The extrusion conditions are: the temperatures from the injection to the outlet are respectively 90, 100 and 110°C. The extruded material was hot-pressed at 20 MPa and 120° C. for 7 minutes on a hot press, and cooled to below 50° C. to take out the hot-pressed sheet. The mechanical properties and water resistance of the material are shown in the attached table.

Embodiment 2

[0016] The whole preparation process is the same as in Example 1, except that the mass ratio of polyurethane prepolymer to soybean dregs is changed to 5:5.

Embodiment 3

[0018] The whole preparation process is the same as in Example 1, except that the soybean dregs are replaced by soybean flour, and the extrusion conditions are replaced by: the temperatures from the injection to the outlet are respectively 80, 90 and 100° C., and the hot pressing temperature is 110° C.

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PUM

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Abstract

A composite material series with different performance from plastics to elastomer is prepared through reaction of polyether polyol or polyester polyol on diisocyanate to obtain prepolymer (polyurethane), proportionally mixing it with soybean dregs or powder, reaction, and hot pressing.

Description

technical field [0001] The invention relates to a composite material obtained from soybean dregs, soybean flour and other soybean by-products, polyether polyol or polyester polyol, and diisocyanate as raw materials and a preparation method thereof, which belongs to the field of polymer chemistry and also belongs to the science of polymer materials field. Background technique [0002] With the depletion of petroleum resources and the pollution of non-degradable synthetic polymers to the environment, the research and development of "green polymers" has become the frontier of polymer science. my country is rich in soybeans, so it has abundant resources of soybean products. However, my country's soybean oil content (17%) is significantly lower than that of the United States (23%), while the price is 40% higher than that of the international market. One of the countermeasures is to increase the utilization rate of by-products after oil extraction and extraction of soybean protei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/395C08L75/04
Inventor 张俐娜陈云邓瑞
Owner WUHAN UNIV
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