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Polyurethane material and its prepn

A technology of polyurethane material and powdery material is applied in the field of foamed polyurethane material and its preparation, which can solve the problems of affecting product development process, restricting industrialized production, and high production cost, achieving good market prospects, low product cost, and liquefaction time. short effect

Inactive Publication Date: 2007-06-06
李剑飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing research technology is limited to the conventional heating method, the heating time is as long as several hours, the liquefaction rate is low, and the condensation and agglomeration of the liquefied products are serious, resulting in high production costs and affecting the development process of the product, which has become a constraint. The bottleneck of its industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Cotton stalk liquefaction

[0044] Liquefier formula: 75% (weight) of polyethylene glycol (PEG400), 15% (weight) of glycerin, and 10% (weight) of water.

[0045] Production method: After the waste cotton stalks are cleaned and removed, they are naturally dried, fed into a grinder and crushed to 80-100 mesh, and dried until the water balance is set aside. First add 100 parts by weight of the prepared composite liquefier into the microwave reactor, then slowly add 3 parts by weight of concentrated sulfuric acid, after mixing evenly, add 20 parts by weight of pre-processed cotton stalk powder into the microwave reactor while stirring After standing still for 30 minutes, start the microwave reactor to control the temperature and react at 100-150°C for 30 minutes, then cool down to about 25°C and filter with suction, and collect the filtrate as the raw material of plant polyol foaming polyurethane. When this raw material is used, it is not necessary to add foamin...

Embodiment 2

[0046] Embodiment 2: Liquefaction of corn stalks

[0047] Liquefier formula: polyethylene glycol (PEG400) 65% (weight), glycerin 16% (weight), water 19% (weight).

[0048] Production method: After cleaning and removing impurities from the corn stalks, dry them naturally, feed them into a pulverizer and pulverize them to 80-100 meshes, and dry them until the water balance is set aside. First add 100 parts by weight of the prepared composite liquefier into the microwave reactor, then slowly add 5 parts by weight of concentrated sulfuric acid, after mixing evenly, then add 35 parts by weight of pre-processed corn stalk powder into the microwave reactor while stirring After standing still for 30 minutes, start the microwave reactor to control the temperature and react at 100-150°C for 20 minutes, then cool down to about 25°C and filter with suction, and collect the filtrate as the raw material of plant polyol foaming polyurethane. When this raw material is used, there is no need ...

Embodiment 3

[0049] Embodiment three: corn cob liquefaction

[0050] The formula of the liquefier: 70% (weight) of polyethylene glycol (PEG400), 20% (weight) of glycerin, and 10% (weight) of water.

[0051] Production method: After cleaning and removing impurities from corn cobs, dry them naturally, feed them into a grinder and crush them to 80-100 mesh, and dry them until the water balance is set aside. First add 100 parts by weight of the prepared composite liquefier into the microwave reactor, then slowly add 6 parts by weight of concentrated sulfuric acid, after mixing evenly, add 40 parts by weight of pre-processed corn cob powder to the microwave reaction while stirring In the kettle, after standing for 30 minutes, start the microwave reactor to control the temperature at 100-150°C for 15 minutes, then cool down to about 25°C and filter with suction, and collect the filtrate to be the raw material of plant polyol foaming polyurethane. When this raw material is used, it is not necessar...

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Abstract

The present invention provides one kind of polyurethane material and its preparation process. The polyurethane material is prepared through inorganic acid catalyzed liquefacation and foamation on the mixture of natural plant powder material and composite liquefier at 100-150 deg.c under the action of microwave of 2450 MHz frequency. The composite liquefier consists of PEG400 60-80 wt%, glycerin 10-25 wt% and water 10-30 wt%. The polyurethane material may be used in making product with high mechanical strength, low density, high heat insulation, good damping performance, biodegradability advantages, and may be used to replace petrochemical material foaming polyurethane material.

Description

technical field [0001] The invention relates to a foamed polyurethane material and a preparation method thereof. Background technique [0002] Polyurethane is the abbreviation of polyurethane, and its English name is polyurethane, which is a kind of polymer material. Polyurethane is an emerging organic polymer material, known as the "fifth largest plastic", and is widely used in many fields of the national economy because of its excellent performance. The product application fields involve light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation... Polyurethane has become a fast-growing material among synthetic materials because of its structure, which is easy to design and process. It is an elastic material with excellent properties such as wear resistance, oil resistance, tear resistance and corrosion resistance. Its wear resistance is 10-100 times that of ordinary carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/64C08G18/48C08G101/00
Inventor 李剑飞
Owner 李剑飞
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