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Flame-retardant polyurethane foam and method for producing the same

A technology for a polyurethane foam and a manufacturing method, which are applied to the field of flame-retardant polyurethane foam and its manufacturing, can solve the problems of reduced foaming reactivity, insufficient effect, poor dispersion and the like, and achieve the effect of inhibiting the reduction of foaming reactivity

Active Publication Date: 2019-09-10
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for finely powdered anti-settling agents such as carbon black and finely powdered silica, the anti-sedimentation effect is not sufficient due to their own poor dispersion.
In addition, hydrogenated castor oil wax and fatty acid amide wax have insufficient sedimentation prevention effect due to insufficient sedimentation prevention performance
Furthermore, in the case of using carbon black or fine powdered silica, depending on the amount used, the foaming reactivity of the polyurethane foam during molding decreases, and the flame retardancy of the polyurethane foam decreases. , In the case of fatty acid amide wax, there is a problem that the flame retardancy of the polyurethane foam decreases.

Method used

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  • Flame-retardant polyurethane foam and method for producing the same
  • Flame-retardant polyurethane foam and method for producing the same
  • Flame-retardant polyurethane foam and method for producing the same

Examples

Experimental program
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Effect test

preparation example Construction

[0082] As a method for preparing the above-mentioned polyol composition, various dispersion methods for uniformly dispersing the polyurethane raw material can be mentioned, for example. As the stirrer used for dispersion, a general-purpose stirrer, disperser, dissolver, kneader, etc. can be used, but for the purpose of improving the dispersibility, the urea derivative used in the present invention is dissolved in an organic solvent in advance and used There are many, so it can be fully and uniformly dispersed with a general-purpose mixer.

[0083] The polyol composition used in the present invention can be used to produce polyurethane foam by reacting with isocyanate, for example, it can be suitably used in production of flexible polyurethane foam, semi-rigid polyurethane foam, rigid polyurethane foam and the like.

[0084] As the isocyanate used in the present invention, a compound having at least two isocyanate groups can be used. It is not particularly limited, and example...

Embodiment

[0098] The present invention will be further described in detail through examples, but the present invention is not limited by these examples.

[0099]

[0100] A predetermined amount of polyol, a flame retardant, and a urea derivative were added to a glass bottle, and stirred at 1500 rpm for 5 minutes using a disperser manufactured by PRIMIX Corporation to obtain a polyol composition. The polyol composition was sealed with a cap and stored in a dark place indoors.

[0101]

[0102] A specified amount of polyol composition, catalyst, water, and foam stabilizer were stirred at 1500 rpm for 5 minutes using a disperser manufactured by PRIMIX Corporation on the day of foam evaluation, and foaming agents other than water were added and stirred immediately before foaming, The isocyanate is added last. At room temperature (20-25°C), pour the polyurethane raw material mixture into a 2L polyethylene cup heated to 40°C, and let it foam freely (raw material liquid temperature: 20±1°...

reference example 7～12

[0172] According to the formula shown in Table 2, no anti-settling agent is used, a specified amount of polyol and flame retardant are added to the glass bottle, and then water, catalyst, foam stabilizer, and foaming agent are mixed immediately to obtain a polyol composition. On the day of preparation, isocyanate was added, foaming was performed, and foaming reactivity, flame retardancy, etc. were evaluated.

[0173] There was no delay in foaming, etc., and the appearance of the foam was also uniform. In addition, it was found that high flame retardancy was exhibited.

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Abstract

The invention relates to a flame-retardant polyurethane foam and a preparation method thereof. The flame-retardant polyurethane foam is composed of a polyol composition prepared through mixing up the polyol with a powdered flame retardant. In this way, even when the polyol composition is stored for a long period of time, the foam reactivity and the flame retardency of the flame-retardant polyurethane foam during the forming process are prevented from getting decreased. The flame-retardant polyurethane foam is prepared through reacting the polyol composition with isocyanate under the catalytic action of a catalyst. The polyol composition, as 100 parts in weight, comprises 5-150 parts of APP, and 0.001-15 parts of at least one compound selected from urea derivatives and lecithin.

Description

technical field [0001] The present invention relates to flame retardant polyurethane foams and methods for their manufacture. Background technique [0002] Polyurethane foam is mainly produced by the reaction of isocyanate and polyol, and is used in a wide range of applications such as cushioning materials for vehicles and furniture, thermal insulation materials for buildings, storage tanks, ships, etc., and structural materials. At present, phosphoric acid esters are mainly used for flame retardancy of polyurethane foams. However, phosphoric acid esters have a plasticizing effect, and therefore there is a problem that mechanical properties of polyurethane foams are reduced and shrinkage occurs. Therefore, it is demanded to replace it with a flame retardant that reduces the amount of phosphate used and does not adversely affect physical properties. [0003] Red phosphorus and polyphosphates can be mentioned as flame retardants instead of phosphoric acid esters, and flame re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08K13/06C08K9/10C08K3/32C08K5/521
Inventor 菅原学猪原英树大森直之甲斐真介
Owner TOSOH CORP