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Higher alkylated triaryl phosphate ester flame retardants

A technology of triaryl phosphate and aryl phosphate, applied in the direction of phosphorus organic compounds, etc., can solve the problems of low foam physical properties, high non-halogen additives, and low efficiency of non-halogen flame retardants

Inactive Publication Date: 2005-01-19
PABU SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to date non-halogenated flame retardants have generally been found to be less efficient than halogenated flame retardants
The use of higher levels of non-halogen additives to compensate for their low efficiency results in low foam physical properties and greater atomization, both of which are inappropriate or even unacceptable

Method used

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  • Higher alkylated triaryl phosphate ester flame retardants
  • Higher alkylated triaryl phosphate ester flame retardants
  • Higher alkylated triaryl phosphate ester flame retardants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 - Preparation of isopropylated triaryl phosphates

[0034] In this example, samples of isopropylated triaryl phosphates with different levels of alkylation were prepared for testing. The phosphate ester samples were produced by combining different ratios of propylene and phenol to produce alkylated phenol, followed by phosphorylation. The preparation is basically carried out according to the process given in Example 4 of US3,576,923. Phosphate ester samples are given in Table 1 below.

[0035] Phosphate

Embodiment 2

[0036] Example 2 - Preparation of Foam Samples

[0037] In this example, foam samples including the phosphate ester samples of Example 1 were prepared to evaluate flame retardant performance and its bloom characteristics.

[0038] Foam samples were prepared by mixing the polyol and phosphate ester samples together. Add the remaining formulation components, except the isocyanate, to the polyol / phosphate mixture and mix. Finally the isocyanate is added and stirred into the mixture.

[0039]The reaction mixture was poured into the box and allowed to swell well. The box containing the expanded foam was placed in a ventilated oven at 110° C. for 30 minutes to promote curing, and the foam samples were removed from their boxes and tested after storage at ambient conditions for at least 24 hours.

[0040] The foam sample formulations tested included 6, 7, 8 parts by weight phosphate samples from Example 1, and 4 and 5 parts by weight tris(dichloropropyl) phosphate, toluene diisocya...

Embodiment 3

[0048] Example 3 - Evaluation of Foam Samples

[0049] In this example, the foam samples from Example 2 were tested for flammability and aerosolization using standard procedures including FMVSS-302 for testing flammability and DIN 75102 for testing aerosolization.

[0050] The nebulization test included tris(dichloropropyl)phosphate (TDCP) as a control. In a foam using the same furnish with similar density and porosity, TDCP was observed to give an SE rating of 4php. DIN 75102 test results are given (unit weight). Less than 1mg of volatile substances is the current requirement.

[0051] The test results of flammability performance and fogging performance are given in Table 3.

[0052] Phosphate samples

[0053] SE * = Indicates that the flame self-extinguished before the 1.5 inch gauge mark during the flame test.

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Abstract

Flame retardants for polymer compositions which are mixtures including triaryl phosphate esters represented by the following formula (I) where R1-R15 can independently be located in the ortho, meta or para positions on their respective phenol rings and are, independently, H or branched or linear alkyl groups having 3 to 11 carbon atoms and the mole ratio of the alkylate to phenol in the mixtures is at least about 0.77, preferably greater than about 0.81, and most preferably greater than about 0.85. The higher alkylated mixtures of triaryl phosphate esters can be incorporated into polymer compositions alone or in combination with other flame retardants.

Description

technical field [0001] This invention relates to alkylated triaryl phosphate flame retardants. More specifically, the present invention relates to the use of advanced alkylated triaryl phosphate flame retardants in polyurethane compositions, and a method for imparting flame retardant properties to polyurethanes by adding such advanced alkylated triaryl phosphates thereto . Background technique [0002] The combination of numerous carbon-hydrogen bonds, large surface area, and open-cell structure make flexible polyurethane foams particularly flammable. Therefore, flame retardant additives are often used to reduce the danger and severity of flexible polyurethane foam fires. [0003] In automotive applications, flame retardant additives are used extensively in flexible polyurethane foams. In most countries, automotive interior parts must meet the combustion performance test MVSS-302 or its equivalent. [0004] Known flame retardant additives are volatile or contain volatile...

Claims

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Application Information

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IPC IPC(8): C09K21/08C07F9/09C08K5/521C08K5/523C08L75/04C09K21/12
CPCC08K5/523C08K5/52
Inventor 理查德·S·罗斯戴维·L·布斯扎德马特纽·D·菲利浦弗兰克·J·刘
Owner PABU SERVICES
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