Adhesives for low surface energy materials
US11981837B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2023 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Apr 10, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2401/006
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A roofing system includes a roofing membrane. The roofing membrane has a surface energy of 40 mN/m or less. The roofing system includes a roofing substrate. The roofing system includes an adhesive disposed between the roofing membrane and the roofing substrate. The adhesive includes a styrenic block copolymer. The styrenic block copolymer is present in an amount of 0.5 wt. % to 30 wt. % based on a total weight of the adhesive. The adhesive includes asphalt. The asphalt is present in an amount of 70 wt. % to 99.5 wt. % based on the total weight of the adhesive. A ratio of the styrenic block copolymer to the asphalt in the adhesive is 1:11 to 1:3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.