Gypsum boards having glass fiber reinforcement with tacky compliant interface therebetween
US7297396B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2004 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Nov 16, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249932
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A bond is created during gypsum board cure between a gypsum matrix and a tacky coating applied onto a glass fiber. The tacky coating is comprised of a polymer composed of methacrylic acid and dimethyldiallyammonium chloride. The polymer is dissolved in an acidic aqueous solution and is roller coated onto the glass fibers. The chopped glass fibers may also be placed in such an acidic solution, which is made alkaline by the addition of alkali, thereby precipitating the polymer out of solution as a tacky composition that produces a tacky coating on the glass fibers. The glass fibers with the tacky bond coating are incorporated in an alkaline gypsum slurry to form a gypsum board having a first and second facer sheet. The tacky coating on the glass fibers bonded to the gypsum matrix result in compliant load transfer between the gypsum matrix and the glass fibers, yielding improved flexure strength and nail pullout resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.