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Fire-retardant system based on phosphorous compounds and fire sealing polymeric compositions

A compound and composition technology, applied in the field of flame retardant systems, can solve problems such as unfavorable polymer properties, flame retardant denaturation, etc.

Inactive Publication Date: 2008-02-13
RHODIA CHEM SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such heating at a temperature above 200 °C will cause denaturation of the flame retardant, which will be detrimental to the properties of the polymer

Method used

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  • Fire-retardant system based on phosphorous compounds and fire sealing polymeric compositions
  • Fire-retardant system based on phosphorous compounds and fire sealing polymeric compositions
  • Fire-retardant system based on phosphorous compounds and fire sealing polymeric compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0080] 50 g of a flame retardant compound sold under the trade name Amgard 1045 were mixed with 1% by weight of stabilizer. At atmospheric pressure, the mixture was brought to 200°C over a period of 30 minutes under reflux and stirring.

[0081] After cooling, the final color of the mixture can determine the stabilizing effect of the additive.

[0082] The tests performed are given in Table I below. Figure 1 shows the color of the mixture obtained after heat treatment, which is a photograph of the bottles obtained in the tests carried out.

[0083] test

1

2

3

4

stabilizer

-

Na 2 CO 3

MgO

Hydrotalcite (i)

bottle

I

II

III

IV

[0084] (i) Hydrotalcite sold under the trade name EXM696 by the company Süd Chemie.

[0085] The results obtained clearly demonstrate the stabilizing effect of the additives tested.

Embodiment 5-7

[0087] A composition based on polyamide 6.6 was prepared containing 30% by weight of glass fibers.

[0088] Flame retardants and stabilizers are included in these compositions in variable amounts.

[0089] - Preparation of flame retardant impregnated on silica substrate

[0090] The high porosity silica used was Tixosil 38X sold by Rhodia with a pore volume of 4.2 ml / g and an effective volume of 2.2 ml / g.

[0091] The amount of Amgard concentrate used for impregnation corresponds to the maximum amount that can be impregnated on the silica, ie the volume at which the silica is saturated.

[0092] The impregnation is carried out under dry conditions. Amgard 1045, which was preheated to 80°C to make it more fluid, was added dropwise to 25ml.

[0093] Weigh 25 g of silica. The maximum infusion volume achieved was 50ml of Amgard 1045, ie 63g.

[0094] The final product thus consists of 55% by weight of Amgard 1045 and 45% by weight of silica.

[0095] The product was in the f...

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Abstract

Flame retardant system for polymeric materials comprises 100 parts by weight of a phosphorus compound (phosphate, phosphinate or phosphonate ester or salt) and 30-80 parts by weight of a stabilizer which is an acid binder or a melamine derivative or condensation product. An independent claim is also included for a flame-retarded polymeric composition comprising a flame retardant system as above.

Description

field of invention [0001] The present invention relates to a flame retardant system for polymers and to polymer-based flame retardant compositions. [0002] In particular, the invention relates to a flame retardant system comprising phosphorus-containing compounds as flame retardants. Background technique [0003] In some fields, such as in the field of producing textile surfaces, these surfaces are rendered flame-resistant by treatment with liquid or soluble flame-retardant compounds, which are deposited on the textile or the fibers and yarns that make it up. On the surface. [0004] In these applications, phosphorus-based liquid flame retardants are often used, especially esters and salts of phosphonic, phosphinic and phosphoric acids. [0005] These treatments are generally carried out at temperatures below 200°C. [0006] These flame retardants are also useful in imparting flame retardancy to various materials. In some of these applications, it is necessary to bring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/49C08L77/00C08K9/12C08L67/04C08K5/3492C08K5/5317C08K9/04C08L23/02C08L25/02C08L67/00C08L69/00C08L71/02C08L75/04
CPCC08L77/00C08K9/04C08K5/5317C08K5/34922C08L71/02C08L69/00C08L75/04C08K5/49C08L25/02C08L23/02C08L67/00
Inventor X·库扬L·莱特J-E·扎内托
Owner RHODIA CHEM SA