Buffered silane emulsions for rendering porous substrates water repellent
US4877654A · kind A · utility
55Cited by
11References
45Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | May 2, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There are provided aqueous emulsions useful for rendering porous substrates water repellent comprising (a) a hydrolyzable silane having a determinable pH-stable range, (b) an emulsifying agent having an HLB value of from 2 to 20, an effective amount of (c) a buffering compound to maintain the composition within the pH-stable range; and (d) water. Such buffered compositions are stable on long term storage and maintain high effective levels of active silane content even when they include biocides which may accelerate the hydrolysis of aqueous silane-containing compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.