A coated granule, and a bituminous roofing membrane comprising a plurality of the coated granules
AssigneeIcopal A/S
InventorsYves MADEC, Dominique HAUDEBERT
Life of this patent
Estimating the term…
Abstract
A coated granule that is suitable for use in a bituminous roofing membrane. The coated granule comprises: i) a granule, the granule comprising cristobalite, ii) a first coating on the surface of the granule, the coating comprising TiO2 in its anatase form and a binder, and iii) an oil barrier coating on the first coating, the oil barrier coating being a compound which will form a bond with a bituminous material, the oil barrier degrading upon exposure to the ultra violet radiation in sunlight and/or the action of rainwater to thereby expose the first coating.
Claims13
A coated granule suitable for use in a bituminous roofing membrane, said coated granule comprising:
- i) a granule having a solar transmittance of less than 3% for wave-lengths less than 1400 nm,
- said granule comprising 20%-100% by weight of cristobalite,
- ii) a first coating on the surface of the granule,
- said coating comprising TiO2 in anatase form and a binder,
- and
- iii) a transparent or translucent oil barrier coating on said first coating,
- said oil barrier coating being an organo-silicon compound which will form a bond with a bituminous material,
- said oil barrier degrading upon exposure to the ultra violet radiation in sunlight and the action of rainwater to thereby expose said first coating.
The coated granule according to claim 5, said binder comprising monoaluminiumphosphate.
13-15. (canceled)
Dependencies are inferred from the claim text.