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Flame retardant for polyurethane foam, composition for polyurethane foam, polyurethane foam and preparation method of modified polyurethane foam

A polyurethane foam and a technology for polyurethane foam are applied in the fields of flame retardants for polyurethane foams, compositions for polyurethane foams, polyurethane foams and modified polyurethane foams, and can solve the problem that halogen-containing systems cannot be completely removed. Phosphate impurities, insufficient prevention of fogging, etc., to achieve the effect of improving flame retardancy

Inactive Publication Date: 2012-07-25
SAKAI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above method, low molecular weight halogen-containing phosphate impurities such as tris(chloropropyl)phosphate (TCPP) cannot be completely removed.
In addition, the oligomer component is also depolymerized by heating for a long time, and a low-molecular-weight halogen-containing phosphate is generated by decomposition, so fogging cannot be sufficiently prevented.
[0006] In addition, polyurethane foam using tris(chloropropyl)phosphate (TCPP) and diethylene glycol·chloropropylphosphate oligomer (DECPP), which are conventional flame retardants for polyurethane foam When the body is heated at high temperature (80-110°C) for a long time, there is a problem of discoloration to brown

Method used

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  • Flame retardant for polyurethane foam, composition for polyurethane foam, polyurethane foam and preparation method of modified polyurethane foam
  • Flame retardant for polyurethane foam, composition for polyurethane foam, polyurethane foam and preparation method of modified polyurethane foam
  • Flame retardant for polyurethane foam, composition for polyurethane foam, polyurethane foam and preparation method of modified polyurethane foam

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Experimental program
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Embodiment

[0126] Although the present invention will be described in more detail based on examples, the present invention is not limited to these examples. In addition, in the following examples and comparative examples, unless otherwise indicated, "%" means "mass %".

[0127] (Evaluation of Thermal Stability)

[0128] Put a 10 mg sample in TG-DTA EXSTAR 6300 manufactured by SII Co., Ltd., and raise the temperature to 130°C at a rate of 5°C / min in an air flow of 200ml / min (when starting in an atmosphere of 30°C It took 20 minutes to reach 130° C.), kept at 130° C. for 160 minutes (180 minutes in total), and measured the weight loss over time by thermogravimetric analysis (TGA), thereby evaluating the thermal stability. A sample with a large weight loss indicates poor thermal stability.

[0129] (Evaluation of foamability of polyurethane foam)

[0130] Using the following method for producing flame-retardant polyurethane foam, mix polyols, silicone oil, tin-based catalysts, amine-based ...

Embodiment 1

[0144] (Preparation of flame retardant for polyurethane foam and evaluation of thermal stability)

[0145] In 100 parts by mass of diethylene glycol chloropropyl phosphate and its oligomer mixture (DECPP), add 0.1 part by mass of bis(2,4-di-tert-butylphenyl) pentaerythritol diethylene After phosphate ester, mixing is carried out while heating. Thermal stability was evaluated by measuring the decomposition weight loss over time of the obtained transparent liquid flame retardant composition by thermogravimetric analysis. The results are shown in figure 1 middle.

Embodiment 2

[0150] (Preparation of Flame Retardant 1 and Production of Polyurethane Foam)

[0151] To 100 parts by mass of DECPP, 0.1 part by mass of bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite was added, and it mixed while heating at 70 degreeC. Thus, a transparent liquid flame retardant composition (flame retardant 1) was obtained. Using the flame retardant 1, the composition for polyurethane foam was prepared in the compounding ratio shown in Table 1. Using the obtained composition for a polyurethane foam, a polyurethane foam was produced according to the method described in the above-mentioned "Method for Producing a Polyurethane Foam". Various evaluations were performed on the obtained foam.

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Abstract

The invention provides a flame retardant for polyurethane foam, a composition for the polyurethane foam, the polyurethane foam and a preparation method of modified polyurethane foam, providing flame-retardant polyurethane foam with good fogging resistance and little thermochromism. The flame retardant for the polyurethane foam contains 100 parts of specific halogen-containing condensed phosphate by mass and 0.01-2.0 parts of diaryl pentaerythritol diphosphite as shown in a formula (2) in which R1, R2, R3, R4 and R5 each independently represents -H or linear, branched or cyclic alkyl; the composition for the polyurethane foam contains the halogen-containing condensed phosphate and the diaryl pentaerythritol diphosphite; and the polyurethane foam is formed of the composition.

Description

technical field [0001] The present invention relates to a flame retardant for polyurethane foam, a composition for polyurethane foam, and a polyurethane foam obtained from the composition. In addition, the present invention also relates to a method for producing a modified polyurethane foam. Background technique [0002] Polyurethane foam is widely used in various molded products such as building materials, automobile parts, and interior household goods. Due to the high flammability of polyurethane foam, most polyurethane foams are mixed with flame retardants. As such a flame retardant, halogen-containing phosphoric acid esters such as chlorine-containing phosphoric acid esters are widely used. [0003] However, when the molecular weight of the halogen-containing phosphoric acid ester is small, the flame retardant itself tends to volatilize from the polyurethane foam under high-temperature conditions such as inside a car in summer, and tends to form fog. [0004] As an ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L75/08C08K5/521C08K5/526C08G18/48C08G101/00
Inventor 辻本英雄大北浩正村上泰之
Owner SAKAI CHEM IND CO LTD
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