Holcim has filed a patent for a method of creating a wind-resistant adhered membrane roof system. The method involves applying a bond adhesive containing a moisture-curable polymer to a roof substrate, and then directly applying a membrane to the adhesive layer. The patent claims have been canceled. GlobalData’s report on Holcim 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 Holcim, battery metal recycling was a key innovation area identified from patents. Holcim's grant share as of September 2023 was 54%. Grant share is based on the ratio of number of grants to total number of patents.
Method for forming adhered membrane roof system
A recently filed patent (Publication Number: US20230304291A1) describes a method for forming an adhered membrane roof system that meets FM 4474 standards for wind uplift. The method involves applying a bond adhesive to an asphalt-based substrate on a roof to create an adhesive layer. The bond adhesive used in this method includes a silyl-terminated polymer and a hydrocarbon tackifier resin, and it does not contain phenolic resin. The adhesive layer is then used to directly apply a membrane, creating a bond between the substrate and the membrane that exceeds 1 pli, as measured by ASTM D1876.
In one embodiment of the method, the thickness of the adhesive layer is at least 5 mils and less than 30 mils. The bond adhesive can be applied to the substrate using various techniques, such as atomizing and spraying the adhesive, pumping it through a power roller, gravity feeding it through a drop spreader, or squeezing it onto the substrate. The bond adhesive has a dynamic viscosity of less than 13,000 cPs and a static viscosity ranging from about 3600 to about 24,000 cPs. The application rate of the bond adhesive should be at least 50 square feet per gallon.
Another embodiment of the method involves using a bond adhesive that includes a silyl-terminated polymer and a low VOC-generating moisture scavenger. The moisture scavenger is a silane compound with organo functional groups and hydrolysable groups that do not generate methanol upon hydrolysis. The membrane used in this embodiment can be a thermoplastic olefin or EPDM membrane. The bond adhesive in this case is devoid of solvent, and the application rate is also at least 50 square feet per gallon.
A further embodiment of the method includes using a bond adhesive that contains a silyl-terminated polymer and a non-phthalate plasticizer. The non-phthalate plasticizer can be selected from glycol ethers and glycol ether esters. The membrane used in this embodiment can be a thermoplastic olefin or EPDM membrane. The bond adhesive has a dynamic viscosity of less than 13,000 cPs and a static viscosity ranging from about 3600 to about 24,000 cPs. The bond adhesive can be applied using the same techniques mentioned earlier.
Overall, this patent describes various methods for forming an adhered membrane roof system that meets FM 4474 standards for wind uplift. These methods involve the use of specific bond adhesives and techniques for applying them, resulting in a strong bond between the substrate and the membrane.
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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.
