Method for filling cracks in a concrete structure with foamable polyurethane prepolymer
US6309493A · kind A · utility
10Cited by
26References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1999 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Feb 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1922
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for filling cracks in concrete surfaces using a one-component, hydrophilic polyurethane prepolymer without the addition of any granular impregnating agents The prepolymer is provided in a hand-held aerosol container and is injected into the cracks through hollow injection ports that are adhered in place on the surfaces over the cracks and subsequently closed off when filled. The crack is filled from the bottom up to prevent the formation of air pockets in the crack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.