Efficient, environmentally acceptable method for waterproofing insulation material
US6086664A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1998 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | May 12, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00982
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process of waterproofing alumina-rich or silica-rich fibrous thermal insulation material, the process including the steps of: PA1 (a) providing an alumina-rich or a silica-rich fibrous material; PA1 (b) providing a waterproofing solution including: PA2 (1) a carrier solvent selected from the group consisting of aliphatic alcohols having from 1C to 6C, water, and mixtures thereof; and PA2 (2) an alkoxysilane defined by the formula R.sub.4-x -Si-(O-R').sub.x where x is 1-3 and R is selected from the group consisting of alkyl groups having from 1C to 10C, hydrogen, or fluorocarbon groups having from 1F to 15F; and where O-R' is an alkoxy group having from 1C to 5C, or a mixture of alkoxysilanes defined by the above formula R.sub.4-x -Si-(O-R').sub.x ; and optionally PA2 (3) modifiers including acids, such as acetic acid or nitric acid, or bases, such as ammonium hydroxide, RNH.sub.2, R.sub.2 NH, or R.sub.3 N, or MOH, where R is selected from the group consisting of alkyl groups having from 1C to 10C or hydrogen, and where M=Na, Li, or K; PA1 (c) contacting the fibrous material with the waterproofing solution for a sufficient amount of time to waterproof the fibrous material; and PA1…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.