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DOI : ,    Vol.18, No.6, 51 ~ 62, 2010
Title
A Study on Catalysts of Epoxy Resin Liner in Sewer Pipe Rehabilitation
김광수 Kwang Soo Kim
Abstract
The problems in technologies of sewer rehabilitation, which have cured with epoxy resin, were to keep under refrigeration to protct a epoxy resin from hardening at room temperature. For studying no-hardening epoxy resin at room temperature, Experimental studies were carried out at different mixing ratios of TH-432, room temperature catalyst, and TH-100, high temperature catalyst. In the experimental results, the higher mixing ratio of high temperature catalyst, the longer the pot life time kept into gelation and gel phases without hardening to plastic matter at room temperature. The optimal mixing ratios of TH-432 and TH-100 were 40 to 60 or 60:40 by weight %. At that ones the gelation phase, being in the state of liquid, kept during 6 days and the gel phase, being in jellylike mass, did during 20hrs. In the view of the results, the epoxy resin mixed with high and room temperature catalysts was considered to keep the liquid or jelly conditions for a long time at room temperature without keeping it in cold storage. After pot life time under the condition of jelly or liquid, more than 80℃ of reaction temperature and 4hrs of reaction time was needed for perfect hardening of epoxy liner in sewer rehabilitation.
Key Words
sewer rehabilitation, high temperature catalyst, room temperature catalyst
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