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Flame-retardant compound polyether polyol for bus roofs, polyurethane foam and preparation method thereof

A technology of polyether polyol and polyurethane foam, applied in the field of polyurethane, can solve the problems of being easy to burn, not having flame retardant properties, and threatening the safety of life and property of car owners.

Inactive Publication Date: 2018-06-12
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane itself does not have flame retardant properties. It is easy to burn and produce a large amount of toxic and harmful gases after encountering an open flame, which seriously threatens the safety of life and property of car owners.

Method used

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  • Flame-retardant compound polyether polyol for bus roofs, polyurethane foam and preparation method thereof
  • Flame-retardant compound polyether polyol for bus roofs, polyurethane foam and preparation method thereof
  • Flame-retardant compound polyether polyol for bus roofs, polyurethane foam and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0058] The present application also provides a method for preparing the above polyurethane foam, which includes the following steps: foaming after mixing the polyurethane raw material composition.

[0059] The mixing method and conditions can be conventional methods and conditions in the art, and the mixing temperature is conventional in the art, preferably 5-15°C. The mixing operation is preferably carried out according to the following steps: stirring at a rotation speed of 3000-4000 revolutions per second (r / s) for 2-3s.

[0060] The foaming method and conditions described herein are conventional methods and conditions in the art, generally free foaming molding at room temperature.

[0061] On the basis of conforming to common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain the preferred examples of the present application.

[0062] The reagents and raw materials used in this application are all commercially available....

Embodiment 1

[0067] (1) The preparation method of combination polyether:

[0068] Put the polyether polyol NJ-330N (75 parts), NJ-6209 (20 parts), MN-700 (5 parts) in the reaction kettle, add the catalyst PMDETA (1 part), BX405 (3 parts), B8870 in sequence (1.5 parts), TCPP (20 parts) and deionized water (35 parts), stir well;

[0069] (2) A preparation method of high flame-retardant all-water low-density spray polyurethane foam:

[0070] Take 1 part of the above combined polyether and 1 part of polyphenyl polymethylene polyisocyanate in a polytetrafluoroethylene cup, control the temperature of the material at 10°C, stir at a speed of 4000r / s for 3s, and freely foam at room temperature After that, you get it.

[0071] The density of gained full water low-density polyurethane foam is 6.8kg / m 3 , the oxygen index is 22.8%.

Embodiment 2-5

[0073] Examples 2-5 According to the method of Example 1, a kind of flame-retardant combination polyether polyol and polyurethane foam for passenger car roof was prepared.

[0074] The formula data of embodiment 1-5 is as shown in table 2.

[0075] The properties of the foams obtained in Examples 1-5 are shown in Table 3.

[0076] The formula data sheet of table 2 embodiment 1-5

[0077]

[0078]

[0079] The performance table of gained foam in the embodiment 1-5 of table 3

[0080] performance

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Abstract

The application relates to a flame-retardant compound polyether polyol for bus roofs. By choosing specific polyether polyol and / or polyester polyol, cross-linking agent, foaming agent and the like, the compound polyether polyol disclosed by the application ensures that prepared polyurethane foam has excellent flame retardance and low density. The application further provides a polyurethane raw material composition comprising the flame-retardant compound polyether polyol for the bus roofs and isocyanate. The application further provides a method for preparing polyurethane foam by utilizing thepolyurethane raw material composition. The application further provides a highly flame-retardant, low-density polyurethane foam which is prepared by utilizing the method. The advantage of the application is that the all-water low-density flame-retardant polyurethane spray foam for bus roofs, the density range of which is between 5.5kg / m<3> and 9kg / m<3> and the oxygen index range of which is between 22 percent and 26 percent, is prepared in an environmentally friendly, pollution-free way.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a flame-retardant combined polyether polyol for the roof of a passenger car, polyurethane foam and a preparation method thereof. Background technique [0002] According to the statistics of the World Association of Automobile Manufacturers, the global automobile production is generally stable and showing a trend of increasing year by year. The three major issues of energy, environmental protection and safety have also become the focus of attention of major automobile manufacturers, seeking lightweight materials on the body. Using it can greatly reduce the weight of the vehicle body and reduce energy consumption. Polyurethane all-water low-density spraying has the advantages of convenient construction, low density, sound absorption and noise reduction, and was quickly selected as the best material by the automotive industry. However, polyurethane itself does not have flame retardant pr...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08G18/76C08K5/521
CPCC08G18/4018C08G18/42C08G18/4202C08G18/4804C08G18/7671C08K5/521C08K2201/014C08G2110/005C08G2110/0083
Inventor 魏路朱振中信延垒王伟
Owner SHANGHAI DONGDA POLYURETHANE
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