All-water foamed molding slow-rebound bloating foamed cotton of MDI (polymethylene polyphenyl isocyanate) with density of 45kg/m<3> and preparation method

An all-water foaming and molding technology, applied in the field of MDI low-density foaming, which can solve problems such as high steam content, irritation of respiratory mucosa and skin, and bronchial asthma.

Inactive Publication Date: 2015-04-29
FUJIAN GENEROUS SLEEP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 1. TDI has been included in the catalog of highly toxic chemicals. When TDI is used for production, the

Method used

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  • All-water foamed molding slow-rebound bloating foamed cotton of MDI (polymethylene polyphenyl isocyanate) with density of 45kg/m&lt;3&gt; and preparation method
  • All-water foamed molding slow-rebound bloating foamed cotton of MDI (polymethylene polyphenyl isocyanate) with density of 45kg/m&lt;3&gt; and preparation method
  • All-water foamed molding slow-rebound bloating foamed cotton of MDI (polymethylene polyphenyl isocyanate) with density of 45kg/m&lt;3&gt; and preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046]

[0047]

example 2

[0049]

[0050] The tensile test report of the present invention is as follows, and the corresponding tensile test diagram is shown in figure 1 .

[0051] test number

[0052] The tear test report of the present invention is as follows, and the corresponding tear test chart is shown in figure 2 .

[0053] test number

[0054] The compression test report of the present invention is as follows, and the corresponding compression test diagram is shown in figure 2 .

[0055] test number

[0056] According to the test data, except for the slight problem in the tensile strength of the final product of the present invention, all the other physical properties have reached or exceeded the national "GB / T24451-2009" standard for slow rebound testing.

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Abstract

The invention discloses all-water foamed molding slow-rebound bloating foamed cotton of MDI (polymethylene polyphenyl isocyanate) with the density of 45kg/m<3>. For the isocyanate in the MDI system, the functionality is 2-3 and the NCO value is 26-30; the polyether polyol is prepared by mixing the following materials: polyol A with the functionality being 3 and the hydroxyl value being 32-60mgKOH/g, polyol B with the functionality being 2 and the hydroxyl value being 240-260mgKOH/g, polyol C with the functionality being 3 and the hydroxyl value being 240-260mgKOH/g, polyol D with the functionality being 3 and the hydroxyl value being 20-28mgKOH/g; and a foaming agent is H2O. The molding slow-rebound bloating foamed cotton disclosed by the invention has the advantages that due to use of MDI for production, the harm can not be caused to a human body, water generates trace carbon dioxide in the foaming reaction, and the pollution to the atmosphere is almost zero; in conclusion, the use is safe and the processing is no-pollution.

Description

technical field [0001] The invention relates to polyurethane foam preparation technology, in particular to MDI low-density foam technology, specifically to MDI full water foam 45kg / m 3 It is related to the raw material formula and preparation method of molding slow rebound expansion foam foam. Background technique [0002] Polyurethane slow-rebound foam has the characteristics of conforming to the shape of the load, and the load will not feel oppressive or tingling. Pillows, mattresses, and cushions made of polyurethane slow-rebound foam have the effects of relieving pressure and promoting blood circulation. [0003] Polymethylene polyphenyl isocyanate, commonly known as MDI (both described as MDI below), has a faster curing rate than toluene diisocyanate, commonly known as TDI (both described below as TDI), and its advantage lies in the preparation of medium and high-density foams (high density at 50kg / m 3 ) of the foam. The existing preparation density is lower than 50...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08J9/08
CPCC08G18/4812C08G18/6666C08G18/7671C08G2110/005C08G2110/0083
Inventor 叶艺峰何留兵黄毅栋曾传振刘南阳叶少煜
Owner FUJIAN GENEROUS SLEEP TECH CO LTD
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