Fire resistant material

a technology of fire-retardant materials and materials, applied in the field of fire-retardant materials, can solve the problems of limiting their suitability, putting pressure on the use of halogenated compounds and certain, and considerable recent impetus to reduce the use of flame-retardant classes

Inactive Publication Date: 2007-08-23
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0041] (ii) one or more flame retardants.
[0042] According to a still further aspect of the present invention there is provided a method for the preparati...

Problems solved by technology

A drawback of many types of organic polymers is flammability which limits their suitability in applications requiring flammability resistance and where regulatory authorities govern flammability standards.
Although the addition of fire retardants to polymeric systems may improve their fire performance other important properties are often adversely effected for example: Mechanical performance Surface finish Durability Rheology Stability Smoke generation Toxicity Cost Recyclability
Furthermore, there has been considerable recent impetus to reduce the use of some flame-retardant classes due to toxicological or environmental concerns.
Such legislation has placed pressure on the use of halogenated compounds and certain metal oxide synergists.
Phosphorus-based flame-retardants such as phosphonates and elemental (red) phosphorus are also undesirable due to their regulation under chemical weapon acts and considerable manufacturing danger.
However, such compositions are undesirable due to the danger associated with handling of elemental phosphorus.
Clearly any use of halogenated flame retardant is undesirable.
In many polymeric systems, however, this fl...

Method used

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Examples

Experimental program
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Effect test

example 1

Preparation of Melamine Hydrochloride Modified Montmorillonite (IOH1)

[0115] Montmorillonite exchanged Na+ (Cation Exchange Capacity (CEC)=92 meq / 100 g) was suspended in 80° C. DI water (2% w / w) and mechanically stirred at 1500 rpm for 60 min. Melamine monohydrochloride salt (1.4 mmol / 100 g montmorillonite) was then added to the solution and the resultant suspension allowed to cool with continued stirring for a further 150 min. Following filtration of the suspension, the precipitate was thoroughly washed with warm DI water and then preliminary dried (60-80° C.). The resultant granular organically modified clay was ground to a particle size of less than 50 micron and then further dried at 75° C. prior to processing or analysis.

XRD (CuKα1 source λ = 0.154 nm)Melamine•HCl modifiedCationNa+MontmorilloniteXRD d0011.10 nm1.27 nm

[0116] Results indicate that with ion exchange montmorillonite's intergallery spacing is increased from 1.10 nm to 1.27 nm. This result is consistent with ...

example 2a

Preparation of Melamine Hydrochloride Modified Montmorillonite in the Presence of Melamine (IOH2)

[0117] Montmorillonite exchanged Na+ (Cation Exchange Capacity (CEC)=92 meq / 100 g) was suspended in 80° C. DI water (2% w / w), melamine added (1.4 mmol / 100 g montmorillonite) and the solution mechanically stirred at 1500 rpm for 60 min. Melamine monohydrochloride salt (1.4 mmol / 100 g montmorillonite) was then added to the solution and the resultant suspension allowed to cool with continued stirring for a further 150 min. Following filtration of the suspension, the precipitate was thoroughly washed with warm DI water and then preliminary dried (60-80° C.). The resultant granular organically modified clay was ground to a particle size of less than 50 micron and then further dried at 75° C. prior to processing or analysis.

XRD (CuKα1 source λ = 0.154 nm)Melamine and Melamine•HCl modifiedCationNa+montmorilloniteXRD d0011.10 nm1.39 nm

[0118] Results indicate that montmorillonite modif...

example 2b

Preparation of Melamine Hydrochloride Modified Montmorillonite in the Presence of Melamine (IOH2)

[0119] 3.0 Kg of sodium montmorillonite was dispersed into 200L de-ionized water at 60° C. with vigorous stirring (200 rpm) adding the powder slowly over a period of approximately one hour to assist wetting out of the individual particles / platelets. After the suspension had stirred at that temperature for approximately 2 hours, an aqueous solution (35L) containing 1.39 Kg melamine and 0.92L HCl (9.65M) at 85° C. was rapidly added whilst the impeller speed was simultaneously increased to 300 rpm. After an initial period of high viscosity whilst the modified montmorillonite aggregated, the viscosity decreased and the clay solution was allowed to stir for a further 3 hours at 60° C. Following filtration of the suspension the collected modified clay was re-dispersed into de-ionized water (150L) and allowed to stir for 1 hour at 60° C. before an aqueous solution (10 L) containing 0.385 Kg ...

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Abstract

The present invention relates to inorganic-organic hybrids (IOHs), methods for their preparation and their use as fire resistant materials or components of fire resistant materials. More specifically, the invention relates to polyamide fire resistant formulations containing IOHs which have application in the production of fire resistant articles or parts thereof for use in the transportation, building, construction and electrical or optical industries.

Description

[0001] The present invention relates to inorganic-organic hybrids (IOHs), methods for their preparation and their use as fire resistant materials or components of fire resistant materials. More specifically, the invention relates to polyamide fire resistant formulations containing IOHs which have application in the production of fire resistant articles or parts thereof for use in the transportation, building, construction and electrical or optical industries. BACKGROUND OF THE INVENTION [0002] Materials based on organic polymeric systems (plastics) are widely used in the transportation, building and construction industries. A drawback of many types of organic polymers is flammability which limits their suitability in applications requiring flammability resistance and where regulatory authorities govern flammability standards. [0003] In commercially produced polymeric systems, flame-retarding species may be added during processing or forming of the materials to reduce the end product...

Claims

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Application Information

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IPC IPC(8): C09K21/00C01B33/44C09K21/06
CPCC09K21/06C01B33/44C08K5/0066C08K2003/343Y10S57/904
Inventor ANGLIN, MATTHEWBATEMAN, STUART
Owner THE BOEING CO
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