Stock material or miscellaneous articles – Composite – Of bituminous or tarry residue
Patent
1997-09-02
1999-07-06
Beck, Shrive
Stock material or miscellaneous articles
Composite
Of bituminous or tarry residue
427212, 4272133, 4273722, 427215, 427138, 106 27A, 106 3824, 106 3825, 106502, 106277, B05D 700, C08J 9500, B32B 1100
Patent
active
059195738
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to the field of coating and emulsions, particularly bituminous emulsions, coated materials obtained by use of these emulsions, as well as devices for the production and laying of bituminous coated materials.
It has more particularly for its object a process for coating of any kind of supports, as well as devices or installations for the production and laying of such coated materials.
It also has for its object a process for the preparation of an emulsion, particularly of the bituminous type, emulsions obtained by this process and having a universal and versatile covering and coating capacity, no matter what the type of support to be coated or to be covered, and a cold coated material obtained by the application of such a bituminous emulsion, as well as means ultimately to render transportable and windable such a coated material.
BACKGROUND OF THE INVENTION
The problem of coating and of covering supports that have not been pretreated and are often wet, rises particularly in respect to bituminous emulsions which must adhesively coat granular and filamentary compositions, taken as they come, on their deposits in the open.
It is a fact that wet materials do not accept in this condition coating with hydrocarbons. The water being in effect the principal occupant, it has until now been necessary either to dry the materials or to displace the water chemically.
A first solution satisfying these problems has been proposed by French patent application 2686811 and European patent application 0 555 167, useful both for hot coating and for cold coating.
The process described in these applications comprises rendering hydrophobic the supports to be coated, by cold pretreatment, by causing to react, in contact with these supports, two hydrophobic vectors, namely: a metallic salt and a fatty acid or similar products. When these latter are mixed with dry or low humidity supports, the hydrophobic nature appears spontaneously, without drying. Moistened with more than 1% water, the support materials, particularly the filamentary ones, must be dried after having added and mixed the hydrophobic vectors, which is also the case for the open granulometry materials. This drying must be carried out cold, hence without the use of a drying drum.
The mineral granulates thus pretreated can be adhesively coated with any bituminous binder, no matter what its form.
OBJECTS OF THE INVENTION
The present invention has for its first object to provide a coating process for any type of support securing the coating cold and a device to carry out particularly this coating process, permitting using to the maximum the elements of the installation and the conventional hot coating materials, while omitting certain of the devices of these latter and thereby rendering the remaining devices more versatile.
Another object of the invention consists in providing an emulsion, bituminous or not, having versatile and universal covering and coating properties, no matter what the nature or type of the support, pretreated or not, and adapted to be obtained in a simple manner, which will not be trouble-some or polluting.
The present invention also has for its object to provide a device permitting producing cold coated materials by utilizing the emulsion produced by the mentioned process.
SUMMARY OF THE INVENTION
To this end, the invention has for its first object a process for the bituminous coating of no matter what support, characterized in that it consists in providing a cold coating of the supports by one or more emulsions with an adhesive rupture, complete or not, obtained in the mixers or the like, then in reheating the coated materials obtained, for example in a reheater, to a sufficient temperature permitting their transportation and their laying at about 100.degree. C., without having to evaporate the water.
The present invention also relates to a process for the preparation of an emulsion having improved coating and covering properties, as well as an emulsion obtained by this process, this latt
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Muntzer Emile Jacques
Muntzer Isabelle
Muntzer Jean
Muntzer Paul Emile
Barr Michael
Beck Shrive
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