Water resistant paper and solution for producing same and building structure employing same
US12157977B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2021 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Nov 30, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/265
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A waterproof architectural element comprising an elongated panel member composed of compressed fibrous material having a first planar surface and an opposed second planar surface. At least one elongated cellulose layer is composed of Kraft paper having paper basis weight between 30 and 90 pounds and an average thickness between 0.003 and 0.009 inches. The elongated substrate has a first planar face and an opposed second planar face. A polymeric layer overlies at least a portion of the first planar face of the elongated substrate and comprises a polymeric blend of between 50 and 80 wt. % styrene butadiene copolymer and 0.2 and 3 wt. % of a cellulose ether compound. The cellulose ether compound comprises hydrogen or an alkyl group selected from the group consisting of methyl, ethyl, hydroxyethyl, hydroxypropyl carboxymethyl, hydroxyethyl methyl, hydroxypropyl and between 30 and 50 wt. % calcium carbonate and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.