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Polyurethane soft foam

A soft foam and polyurethane technology, applied in the field of preparing polyurethane soft foam, can solve the problems of high boiling point of toluenediamine, non-volatile, human body harm and the like

Pending Publication Date: 2021-09-28
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hydrolysis of toluene diisocyanate, it is easy to generate the toxic substance toluene diamine, resulting in some produced foam products containing a certain amount of toluene diamine
Most of the applications of polyurethane soft foam will be in close contact with the human body, and toluenediamine has a high boiling point and is not easy to volatilize. Migration during use will cause certain harm to the human body

Method used

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  • Polyurethane soft foam
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Examples

Experimental program
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Effect test

preparation example Construction

[0053] The method for preparing flexible polyurethane foam of the present invention is to make the polyurethane reaction system comprising the following components to obtain the flexible polyurethane foam:

[0054] Component A, consisting of:

[0055] A1) toluene diisocyanate, its content is 15-80pbw, preferably 30-65pbw, based on 100pbw of component B;

[0056] A2) at least one aliphatic isocyanate, the content of which is 1-13pbw, preferably 1-12pbw, more preferably 1-8pbw, especially preferably 4-7pbw, based on 100pbw of component B;

[0057] Component B, one or more polyether polyols, comprising:

[0058] B1) Based on the total weight of B1, the ethylene oxide unit content is 0-30wt%, preferably 5-20wt%, the average functionality is 2-4, and the hydroxyl value is 80-180mgKOH / g (test method GB / T 12008.3-2009 ) polyether polyol, the content of which is 30-100pbw, preferably 80-100pbw, based on 100pbw of component B;

[0059] Component C, at least one blowing agent; and

...

Embodiment

[0128] The various test methods of the embodiment are described as follows:

[0129] Indentation hardness refers to the force required to achieve a certain deformation using a standard sample under specified conditions and instrument test procedures, measured by GB / T 10807-2006;

[0130] Tensile strength refers to the maximum tensile stress suffered by the sample during the stretching process, measured by GB / T 6344-2008;

[0131] Tear strength refers to the force required to tear a thin sample, measured by GB / T 10808-2006;

[0132] Air permeability refers to the ability of air to pass through the foam, the test method ASTM D3574-G, and the test condition is a pressure difference of 125Pa. Comparative example 1 records the air permeability according to ASTM D3574--2005 as shown in table 1; in embodiment 1 In -3, the data cannot be measured when the pressure difference is 125Pa using the aforementioned test method, indicating that the air permeability is very good; if the test...

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Abstract

The invention relates to a method for preparing soft polyurethane foam, the soft polyurethane foam prepared by the method, and application of the soft polyurethane foam in the aspects of household articles and automobile accessories.

Description

technical field [0001] The invention relates to a method for preparing polyurethane soft foam, the polyurethane foam prepared by the method, and the use of the polyurethane soft foam in household articles and automobile articles. Background technique [0002] Polyurethane soft foam is widely used in household and automobile fields due to its excellent comfort and physical properties, such as in the production of sofas, mattresses, pillows, clothing liners, car interiors, car seats, etc. [0003] In industrial production, polyurethane soft foam / high resilience sponge can be produced using continuous bulk sponge foaming process, discontinuous bulk sponge process and molding process. [0004] The raw materials used in the production of traditional polyurethane flexible foam are mainly polyether polyols and toluene diisocyanate, water is the main foaming agent, supplemented by organic tertiary amines, organometallic catalysts and organic silicon surface stabilizers Agents and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/72C08G18/48C08G101/00
CPCC08G18/7614C08G18/755C08G18/73C08G18/724C08G18/48
Inventor 张俊伍维成何杰杰王晴云余辉
Owner COVESTRO DEUTSCHLAND AG
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