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US 2016/0221885 A1Published application
Hydrophobized fiber cement product comprising at lease one profiled surface
AssigneeRedco N.V.
InventorFrank Van den Bergh
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Abstract
A method for improving the hydrophobic properties of a fiber cement product, is provided. The method comprises the steps of providing a fiber cement product comprising at least one profiled surface, applying a water-free silane-based liquid to the at least one profiled surface, and allowing said water-free silane-based liquid to penetrate into the fiber cement product.
Claims17
1:
- A method for improving the hydrophobic properties of a fiber cement product, said method comprising the steps of:
- providing a fiber cement product comprising at least one profiled surface;
- applying a water-free silane-based liquid to the at least one profiled surface;
- and
- allowing said water-free silane-based liquid to penetrate into the fiber cement product.
2 more elements
2:
- A method according to claim 1, wherein said water-free silane-based liquid is a solvent-free silane-based liquid.
3:
- A method according to claim 1, wherein the water-free silane-based liquid applied to the at least one profiled surface is in an amount of less than 150 g/m2, and more than 10 g/m.
4:
- A method according to claim 1, wherein the fiber cement product is a fiber cement plate.
5:
- A method according to claim 4, wherein the fiber cement plate has at least one surface comprising at least one groove.
6:
- A method according to claim 1, wherein the profiled surface comprises a plurality of grooves being equally distributed over said surface, said grooves all having a uniform direction and a uniform depth.
7:
- A method according to claim 6, wherein said grooves have a trapezoid cross section according to a plane perpendicular to the direction of the groove, said groove having a flat bottom and two flanks, the angles between the bottom and each of said flanks is in the range of 90° to about 180°.
8:
- A fiber cement product according to claim 1, wherein the fiber cement product is an autoclave cured fiber cement product.
9:
- A method according to claim 1, wherein applying said water-free silane-based liquid is done by spraying said water-free silane-based liquid to the profiled surface.
10:
- A method according to claim 1, wherein applying said water-free silane-based liquid is done by brushing or rolling said water-free silane-based liquid to the profiled surface.
11:
- A method according to claim 1, wherein the provision of a fiber cement product comprising at least one profiled surface comprises the provision of a green fiber cement plate using a Hatscheck process, and profiling at least one surface of said fiber cement plate after curing of the green fiber cement plate.
12:
- A method according to claim 11, wherein the green fiber cement plate is cured using autoclave curing.
13:
- A method according to claim 1, wherein the profiled surface is provided by milling the fiber cement product.
14:
- A fiber cement product obtained according to claim 1.
15:
- A fiber cement product comprising at least one profiled surface, said fiber cement product comprising a porous fiber cement matrix along said at least one profiled surface, characterized in that a water-free silane-based hydrophobic agent is present in the pores of said matrix along said at least one profiled surface.
16:
- A fiber cement product according to claim 15, wherein the profiled surface is free of silane- and siloxane-residue.
17:
- The use of water-free silane-based liquid to improve the hydrophobic properties of the profiled surfaces of a fiber cement product having at least one profiled surface.