FIELD: chemistry.
SUBSTANCE: invention relates to curable channel or pipe liners, e.g., for repairing damaged pipes, such as underground sewage and gas pipes, and a lining method. The lining includes a three-layered coating of thermoplastic polyurethane (TPU) on a fibrous mat made of nonwoven material. The TPU coating contains a barrier layer which prevents migration of styrene from the liner to the media used to force the liner against the damaged pipe and to activate the thermosetting resin. The thermosetting resin converts the liner from a flexible state to a rigid state as the liner is cured in situ inside the pipe.
EFFECT: invention provides a lining with high resistance to passage of styrene, which prevents contamination of the water or steam with styrene.
16 cl, 1 tbl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| STRUCTURED ABRASIVE MATERIAL WITH TOP LAYER AND METHOD OF ITS FABRICATION AND APPLICATION | 2008 |
|
RU2471609C2 |
| EMBOSSED STRUCTURED ABRASIVE ARTICLE AND METHOD OF ITS PRODUCTION AND USE | 2007 |
|
RU2449881C2 |
| METHOD OF THREE-DIMENSIONAL APPLICATION FOR CREATION OF LAYERS OF POLYMER MATERIAL ON OBJECT | 2017 |
|
RU2702562C1 |
| ELASTOMER PMMA LAYERED COMPOSITES HAVING IMPROVED PROPERTIES | 2014 |
|
RU2655145C2 |
| ABRASIVE ARTICLE WITH COATING ON FOAMED SUBSTRATE AND METHOD OF ITS FABRICATION | 2012 |
|
RU2577572C2 |
| PAPER PRODUCT, WHICH CONTAINS CLEANING COMPOSITION | 2004 |
|
RU2351311C2 |
| POWDER COATING COMPOSITION FOR CATHODIC PROTECTION AND METHOD | 2004 |
|
RU2351623C2 |
| MULTI-LAYER FILM WITH IMPROVED PROPERTIES OF ELASTIC MODULE | 2013 |
|
RU2636711C2 |
| POLYMER MATERIAL | 2018 |
|
RU2765293C2 |
| FILLED ELASTOMER CONTAINING POLYURETHANE | 2012 |
|
RU2622384C2 |
