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Polyurethane foam material and its preparation method

A technology of polyurethane foam and polycarbonate type, which is applied in the field of aliphatic polycarbonate type polyurethane foam material and its preparation, can solve the problems of high price of small molecule carbonate, heavy pollution, hinder large-scale application of materials, etc., and achieve good The effect of low temperature flexibility, good room temperature and good degradation performance

Inactive Publication Date: 2003-03-05
JIANGSU ZHONGKE JINLONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of the small molecule carbonate used in this process, and the pollution generated during the production process is also relatively large, which seriously hinders the large-scale application of this type of material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add 50 grams of dipropylene glycol, 500 milliliters of toluene, 2000 milliliters of propylene oxide, and 20 grams of polymer-loaded double metal cyanide (ZL 89100701) as catalysts into a 5-liter reactor, stir at room temperature for 15 minutes, and then add 1100 grams of carbon dioxide. Turn on the stirring and heating device, react at 60°C for 6 hours, cool to room temperature, remove residual propylene oxide and solvent under reduced pressure, and then discharge.

[0043] Get 1000g of polymerization product and add 2000 milliliters of boiling water, stir for 15 minutes, transfer the resin layer to a 2000ml there-necked flask, and discharge the material after vacuum dehydration for about 3 hours under stirring at 60°C, measure the moisture content in the material (measured by Fischer method) ), polymer molecular weight. The molecular weight of the polymer is measured by the viscosity method, according to the literature (Chen Liban, Ni Erxia, Yang Shuying, etc. A new m...

Embodiment 2

[0053] Get 100g of resin (after dehydration) prepared by the method of Example 1 in a 250ml beaker, add 1g of water-soluble polyether siloxane (foam stabilizer), 2.6g of water (plus the incomplete removal of moisture in the polymer) Amount), 6g glycerol, 0.04g 6.4% dipropylene glycol solution of di-n-butyltin dilaurate, 0.06g 33% triethylenediamine dipropylene glycol solution, adopt strong stirring device to stir (stirrer rotating speed 2000rmp ), add 83.0g of carbodiimide-modified MDI (MDI index 1.1) after fully mixing and mixing, stir and mix, quickly pour into the foaming mold after uniformity, free foaming, demoulding after curing for 48 hours.

[0054] The physical properties of the product are measured by the method of Example 1, and the results are shown in Table 1.

Embodiment 3

[0056] Get 100g of resin (after dehydration) prepared by the method of Example 1 in a 250ml beaker, add 1g of water-soluble polyether siloxane (foam stabilizer), 2.6g of water (plus the incomplete removal of moisture in the polymer) Amount), 3g glycerol, the dipropylene glycol solution of 0.04g 6.4% di-n-butyltin dilaurate, the 0.06g 33% triethylenediamine dipropylene glycol solution, adopt strong stirring device to stir (stirrer rotating speed 2000rmp ), add 67.9g of carbodiimide-modified MDI (MDI index 1.1) after fully mixing and mixing, stir and mix, quickly pour into the foaming mold after uniformity, free foaming, demoulding after curing for 48 hours.

[0057] The physical properties of the product are measured by the method of Example 1, and the results are shown in Table 1.

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Abstract

The present invention relates to a novel polyurethane foam material and its production method. It is an aliphatic polycarbonate type polyurethane foam material synthesized by using carbon dioxide as initial raw material, in which the carbonate group content is betwene 15%-30%. Its production method adopts the aliphatic polycarbonate polyalcohol which is synthesized by using carbon dioxide and epoxy compound and whose number-average molecular weight is less than 10000, hydroxyl functionality is 2,3 or higher than that and the mole fraction of carbonate group in molecular is between 0.2-0.5; then makes the polyalcohol resin and diisocyanate and / or polycyanate produce reaction in the presence of catalyst, foaming agent, crosslinking or chain extender, foam stabilizing agent and other adjuvant to synthesize said invented product.

Description

technical field [0001] The invention relates to a novel aliphatic polycarbonate polyurethane foam material with high carbonate content and a preparation method thereof, which uses carbon dioxide as a starting raw material for synthesis. technical background [0002] The preparation of polyurethane materials with carbon dioxide as a starting material is a new technology developed in recent years, and the obtained polyurethane materials belong to aliphatic polycarbonate polyurethane. This type of polyurethane material has many unique properties. Compared with polyether polyurethane material, its mechanical strength and wear resistance are much better; compared with polyester polyurethane material, it has better low temperature flexibility and hydrolysis resistance. properties and antioxidant properties. In addition, some varieties of such polyurethane materials also have good biodegradability. In the past, aliphatic polycarbonate polyurethane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/44
Inventor 刘保华陈立班张敏
Owner JIANGSU ZHONGKE JINLONG CHEM
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