Fire-retardant composite materials

Inactive Publication Date: 2012-06-28
GURIT (UK) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The present inventors have addressed these problems of known composite materials and have aimed to provide fire-retardant fibre-reinforced composite materials, and prepregs therefor, which

Problems solved by technology

When a composite material is used for interior panel construction for mass transport applications, such as aerospace, trains, ferries, etc., in particular for the interiors of such vehicles, a fire, smoke and toxicity requirement is necessary.
Such voids would otherwise decrease the mechanical properties of the laminate.
This press-curing increases processing cost.
Secondly, the release of volatiles creates poor surface finishes that require significant filling and fairing of the cured components at a substantial additional cost.
The release of volatile components, and solvents, also results in the need to take specific health and safety precautions when using such phenolic resins.
However; they are limited in their application in primary structures due to their poor relative toughness and strength propert

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

Example 1

[0102]The fire-retardancy of a prepreg resin in accordance with the present invention was tested in the laboratory for fire-retardant properties. A cone calorimeter was used for all laboratory testing in accordance with ISO 5660-1. In addition, pilot batch material was tested to BS476 Part 6 and 7.

[0103]Various samples of epoxide resin having the following composition / additives were tested in accordance with a number of industry standard FST tests.

[0104]The Burn Time (in seconds) according to UL94 was measured, as were the time to ignition (s), the peak rate of heat release (kWm−2), the total heat released (MJm−2) and the smoke emission MWkg−1). The results are shown in Table 3 below.

TABLE 3FST ResultsISO5660-1PeakISOrate of5660-1UL94ISO 5660-1heatTotalISO 5660-1BurnTime toreleaseHeatSmokeTimeIgnition(kWm-ReleasedParameterParameter(s)(s)2)(MJm-2)(MWkg-1)DGEBPA (bisphenol A->50sNotNotNotNot testedbased prepreg matrixtestedtestedtestedresin, unmodified).DGEBPF (bisphenol F-20...

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Abstract

A prepreg for the manufacture of a fibre-reinforced composite material, the prepreg including:
    • i. an epoxy-resin matrix including:
    • a. at least one non-halogenated epoxide-containing resin which has been chemically modified with at least one of a nitrogen- and/or phosphorous-containing molecule which has been chemically reacted with the epoxide-containing molecule;
    • b. at least one toughening additive comprising an elastomeric or thermoplastic material chemically reacted with the at least one epoxide-containing resin;
    • c. at least one mineral filler to provide fire-retardancy; and
    • d. at least one catalyst for curing the epoxide-containing resin; and
    • ii. a fibrous reinforcement at least partially impregnated by the epoxy resin matrix.

Description

FIELD OF THE INVENTION[0001]The present invention relates to fire-retardant fibre-reinforced composite materials and to prepregs therefor.BACKGROUND[0002]It is well known to use fibre-reinforced resin composite materials for the manufacture of structural components in a variety of industrial sectors. For some applications, the fibre-reinforced resin composite materials are manufactured from what are known in the art as prepregs—a prepreg comprises fibrous material pre-impregnated with a resin, and the amount of resin is matched to the amount of fibre so that after plural prepregs have been laid up into a mould and the resin has cured, optionally with a preliminary full wetting out of the fibrous material by the resin if the prepreg was initially not fully impregnated, a unitary fibre-reinforced composite material moulding is formed with the correct ratio of fibre to resin so that the material has the required material properties.[0003]When a composite material is used for interior p...

Claims

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Application Information

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IPC IPC(8): B32B3/12B32B27/04
CPCC08G59/1488C08G59/4021C08G59/686C08J5/24C08J2363/00C08L21/00Y10T428/24149C08L71/02C08L63/00C08L2666/22C08L2666/04Y10T428/24994C08J5/244C08J5/249C08G59/182C09J163/00
Inventor SPENCER, PAULCREASER, BENJAMIN
Owner GURIT (UK) LTD
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