Non-black EPDM roof membranes with improved weathering
US9915069B1 · kind B1 · utility
1Cited by
11References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 2015 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Mar 13, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/019
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A non-black roofing membrane comprises an EPDM rubber; a non-black filler; a UV light stabilizer selected from the group consisting of NOR-HALS of the formulawherein R* is C1-C20alkyl, OH-substituted C1-C20alkyl, optionally C1-C4 alkyl-substituted C5-C12cycloalkyl, C7-C9phenylalkyl or O- or S-interrupted C2-C20alkyl, preferably C1-C12alkyl, benzyl or C5-C8 cycloalkyl especially C6-C10alkyl or cyclohexyl; and a cure package. The resultant roofing membrane provides increased weathering resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.