Fireproof Composition
a composition and composition technology, applied in the direction of coatings, etc., can solve the problems of difficult transposition of techniques, affecting the fire resistance of materials over time, and affecting the fire resistance of materials
Inactive Publication Date: 2008-11-27
NANOCYL SA
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Benefits of technology
"The present invention is about a fire-resistant composition that contains reticulated polysiloxane and raw carbon nanotubes. The carbon nanotubes are present in a certain amount and can be single-wall, double-wall, or multi-wall carbon nanotubes. The composition has good consistency and can be applied using a brush or extrusion gun. The carbon nanotubes can be produced by chemical vapor deposition or laser ablation. The composition can be used as a fire-resistant protective coating, seal, or coating. The technical effect of this invention is that it provides a fire-resistant material that can protect fireproof surfaces from fire outbreaks."
Problems solved by technology
For polymer-based coatings, this technique is difficult to transpose because the polymers used have a pasty consistency.
Another problem is that of fire resistance of the materials over time and in particular in the field of aeronautics.
These seals, which are not or hardly fireproof in comparison with the materials that they link, may indeed begin to melt well before the critical temperature level of the materials is reached.
The disadvantage of the use of this type of coating is the fact that the quantity of the required filler is normally higher than 10%, which has the effect of altering the mechanical properties of the polymers used and of making them less flexible.
If not, cracks may appear and offer points of attack for the fire.
Moreover, such fire-resistant polymers do not have a consistency suitable for their application in the form of a coating or a seal.
Method used
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[0074]To 10 parts of precursor A which includes:[0075]67% by weight of a PDMS matrix containing vinyl terminations,[0076]31% by weight of a VQM matrix containing vinyl groups,[0077]1% by weight of single-wall and / or multi-wall nanotubes,[0078]0.14% by weight of platinum-based catalyst,[0079]cyclic composites and volatile low molecular weight silicone and xylene,[0080]is added, after degassing at a pressure of 8.9 mbar for 10 mins, 1 part of precursor B which contains:[0081]60% by weight of an Si—H polymer,[0082]39% by weight of a PDMS matrix containing vinyl terminations,[0083]1% by weight of a methyl cyclotetra siloxane reticulation inhibitor.
The reticulation is then produced by putting the element covered with the precursor A / precursor B mixture, that is, preferably aluminium plates, at 105° C. for at least six hours.
[0084]The application of the composition on aluminium plates, for example in the form of a coating, may be done according to various embodiments.
[0085]A first method ...
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Abstract
The present invention concerns a fireproof composition consisting of reticulated polysiloxane and raw carbon nanotubes with a “bound rubber” value greater than or equal to 15 grams of carbon nanotube, said carbon nanotubes representing between 0.05 and 1% of the total weight of said composition.
Description
SUBJECT OF THE INVENTION[0001]The present invention concerns a composition comprising a reticulated polymer and carbon nanotubes as well as a method of making use of this composition. The composition according to the invention has surprising viscosimetric and fire-resistant properties that allow it to be used respectively in the form of a fire-resistant protective coating and in the form of a fireproof seal.STATE OF THE ART[0002]In aeronautics, traditional paints are normally applied by spraying by means of a spray gun. For polymer-based coatings, this technique is difficult to transpose because the polymers used have a pasty consistency. The application of this type of coating can therefore pose a certain number of practical problems.[0003]Just like the paints, the seals must have particular properties of viscosity. On the one hand they must be flexible enough so as to be easily applied and on the other hand they must be then fixed enough to retain their shape while following any p...
Claims
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IPC IPC(8): C08L83/04
CPCC08K7/24C08L83/04C09D183/06C09D183/04C08G77/045C08G77/12C08G77/20C08G77/80C08K3/041C08L83/00C08K5/56
Inventor ALEXANDRE, MICHAELDUBOIS, PHILIPPEDEVALCKENAERE, MYRIAMCLAES, MICHAEL
Owner NANOCYL SA