Buffered silane emulsions having low volatile organic compounds when cured
US4990377A · kind A · utility
31Cited by
12References
74Claims
0Family size
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Inventor
Key dates
| Filing date | Aug 10, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Aug 10, 2009 |
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 having low volatile organic compound content when cured comprising effective amounts of (a) a hydrolyzable silane having a determinable pH-stable range, (b) an emulsifying agent having an HLB value of from 2 to 20, (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.