- Patent Title: Building assembly including a weather resistant barrier, a sheet for use as a weather resistant barrier, a liquid coating composition and methods of making the foregoing
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Application No.: US16196849Application Date: 2018-11-20
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Publication No.: US10508435B2Publication Date: 2019-12-17
- Inventor: Jeffrey H. Peet , Bertrand Heurtefeu , Nicole Love , Antoine Diguet
- Applicant: CERTAINTEED CORPORATION
- Applicant Address: US PA Malvern
- Assignee: CERTAINTEED CORPORATION
- Current Assignee: CERTAINTEED CORPORATION
- Current Assignee Address: US PA Malvern
- Agent Abel Schillinger, LLP; Thomas H. Osborn
- Main IPC: E04B1/62
- IPC: E04B1/62 ; B05D1/18 ; C09D133/08 ; E04B2/00 ; C09D109/00 ; C09D109/06 ; B05D1/02 ; B05D1/28 ; E04C2/04 ; E04C2/52 ; C09D133/26 ; C09D109/02
Abstract:
A weather resistive barrier (WRB) for the exterior protection of building substrates can have a water vapor permeability that decreases with increasing temperature. In an embodiment, the WRB includes a coating comprising a LCST polymer, and may further include a second polymer. The WRB can be part of a building assembly, part of a sheet, or a sheet itself, the sheet having an air permeability of less than 0.02 L/(s m2) at a pressure of 75 Pa. Furthermore a liquid coating composition can include a LCST polymer and a second polymer, wherein the liquid coating composition can be adapted that a solid coating formed by the liquid coating composition has an air permeability of less than 0.02 L/(s m2) at a pressure of 75 Pa and a water vapor permeability that decreases with increasing temperature.
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