FIELD: chemistry.
SUBSTANCE: method includes providing the first length of the insulated pipe and the second length of the insulated pipe, each has at least one uninsulated end that do not contain insulation, the connection of the uninsulated end of the first length of the insulated pipe with the uninsulated end of the second length of the insulated pipe for forming the connection, the introduction of a curable reaction mixture into the gap, and curing the reaction mixture. The curable reaction mixture contains at least one simple polyetherpolyol, 1,4-butandiol, aromatic polyisocyanate, a catalyst in the form of zinc carboxylate, and epoxy resin. The reaction mixture is substantially free of the reaction catalyst of the epoxy group with an isocyanate group resulting in the formation of oxazolidinone and also substantially free of the amine curing agent.
EFFECT: these mixtures are cured and acquire a raw strength similar to mercury catalyst systems.
10 cl, 4 dwg, 1 tbl, 2 ex
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Authors
Dates
2018-01-23—Published
2013-09-16—Filed