POLYMERIC COMPOSITION FOR ISOLATING AND STRENGTHENING ROCK Russian patent published in 2018 - IPC C09K8/512 E21D21/00 C09K17/30 

FIELD: chemistry.

SUBSTANCE: polymer composition contains a prepolymer with short polymer chains separately injected into the rock mass in the volume ratio of 1:1, formed by mixing the solvent of 2,2,4-trimethyl-1,3-pentandioldiizobutirate, the hydroxyl-containing component of polypropylene glycol and a polyisocyanate of the brand "Wannate PM-200", taken in a double excess. The injection is carried out at the following ratio component in the prepolymer, wt %: polyisocyanate - 73-75, polypropylene glycol - 11-12, solvent - 14-15 and hydroxyl-containing plasticiser formed by mixing the solvent of 2.2,4-trimethyl-1.3-pentandioldiizobutirate and polypropylene glycol with the addition of the regulator polymerization "AMINE A33" in the following ratio component in the plasticiser, wt %: solvent - 84-87, polypropylene glycol - 11-13, the regulator polymerization - 0.1-4.5.

EFFECT: increasing the penetration depth and efficiency of the polymer injection structure in an array of species by reducing the viscosity of fluids while maintaining low compressibility of the whole, under the influence of pressure and small content of it residual isocyanate.

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