Weather-resistive barriers from self collapsing polyurethane foams
US9925753B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 25, 2014 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | May 15, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B1/7604
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a self-collapsing, moisture curable one component polyurethane foam (1K PU) composition from moisture curable polyurethane prepolymers and to methods of making weather resistant barriers and formed in place gaskets therefrom. The foam compositions are packed under pressure with a blowing agent. In the methods, the foams are applied to gaps in the exterior (sheathing) of a building under construction and collapse on cure to enable application an aqueous weather barrier coating thereover within an hour. The foams also cure when applied on or adjacent a structure to form a foam gasket that enables installation of additional structural elements over or adjacent the foam gasket without bowing or damage to the structure treated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.