Pipe rehabilitation using epoxy resin composition
US5017258A · kind A · utility
24Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1987 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Nov 6, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2363/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An epoxy resin composition containing an imidazole curing agent is useful in processes for lining the interior surfaces of buried pipes. The imidazole is non-substituted at the 1 position and is preferably alkyl-substituted at the 2 position, such as 2-propyl imidazole. Pipe-lining compositions using such imidazole-cured systems have long working lives, short cure times at moderate temperatures, low tendency to exotherm, insensitivity to moisture, and low creep and shrinkage, resulting in a pipe-lining system which can be used in a wide range of field conditions and produces a superior pipe liner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.