POLYURETHANE ELASTOMER FOR APPLICATION IN ISOLATION OF MARINE UNDERWATER PIPELINE Russian patent published in 2018 - IPC C08G18/66 C08G18/22 C08G18/76 F16L9/18 F16L59/14 F16L59/153 F16L59/16 

Abstract RU 2641908 C2

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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RU 2 641 908 C2

Authors

Stefenson Ember

Reksrod Erik

Dates

2018-01-23Published

2013-09-16Filed