Compagnie de Saint-Gobain has filed a patent for a bituminous composition suitable for roofing materials. The composition includes asphalt, rubber polymer, and polyolefin wax as the bituminous component, and a filler component consisting of huntite, hydromagnesite, wollastonite, magnesium hydroxide, and zinc borate. The patent aims to provide an improved roofing material with specific weight percentages of each component. GlobalData’s report on Compagnie de Saint-Gobain gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Compagnie de Saint-Gobain, Heater-integrated de-icing windows was a key innovation area identified from patents. Compagnie de Saint-Gobain's grant share as of September 2023 was 58%. Grant share is based on the ratio of number of grants to total number of patents.
A bituminous composition for roofing materials with specific components and ratios
A recently filed patent (Publication Number: US20230313531A1) describes a bituminous composition suitable for use in roofing materials. The composition includes a bituminous component consisting of an asphalt component, a rubber polymer, and a polyolefin wax. Additionally, the composition contains a filler component, which can include huntite, hydromagnesite, wollastonite, magnesium hydroxide, and zinc borate. The total amount of these fillers should be in the range of 20-70 wt% of the bituminous component.
The asphalt component in the composition can have a pen range above 100 pen and can be present in an amount of 80-95 wt% of the bituminous component. The rubber polymer can be one or more styrene block copolymers, and the polyolefin wax can be a polyethylene wax, a polypropylene wax, or a wax copolymer of ethylene and propylene. The polyolefin wax should be present in an amount of 0.5-4 wt% of the bituminous component.
The composition can also include both huntite and hydromagnesite, with a huntite:hydromagnesite ratio in the range of 1:4 to 4:1. Wollastonite can also be present, either alone or together with huntite, hydromagnesite, and zinc borate. Additionally, magnesium hydroxide and zinc borate can be included in the composition.
The bituminous composition has a viscosity at 375° F. in the range of 3500 to 8000 cP and a penetration index at 77° F. in the range of 20-70 dmm.
The patent also describes a roofing shingle comprising a porous substrate, at least one layer of the bituminous composition, and a plurality of roofing granules adhered to the top surface of the composition. Furthermore, a roofing system can be created by placing these roofing shingles on a roof structure, with the system having a slope in the range of 2:12 to 12:12.
Lastly, the patent mentions a roofing membrane that includes the bituminous composition disposed on at least one side of a porous substrate.
Overall, this patent presents a specific formulation for a bituminous composition suitable for roofing materials. The composition includes various components such as asphalt, rubber polymer, polyolefin wax, and fillers like huntite, hydromagnesite, wollastonite, magnesium hydroxide, and zinc borate. The patent also describes the use of this composition in roofing shingles, roofing systems, and roofing membranes.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
