METHOD OF PRODUCING POLYMER PROPPANT MICROSPHERES FROM POLYMER MATRIX BASED ON METATHESIS-RADICALLY CROSS-LINKED MIXTURE OF OLIGOCYCLOPENTADIENES Russian patent published in 2015 - IPC C09K8/80 C08F132/06 

FIELD: chemistry.

SUBSTANCE: method employs a polymer matrix based on metathesis-radically cross-linked mixture of oligocyclopentadienes. The polymer matrix has the following components, wt %: polymer stabiliser - 0.1-3.0, radical initiator - 0.1-4.0, ruthenium catalyst for metathesis polymerisation of dicyclopentadiene - 0.001-0.02, mixture of oligocyclopentadienes - the balance. After stirring at 0-35°C for 1-40 min, the mixture is added in the form of a laminar stream to an aqueous solution of a thickener. The thickener contains surfactants, has viscosity of 5-500 cP and temperature of 5-50°C. The formed microspheres are separated, heated in a medium of an inert liquid to 150-340°C and held for 1-360 min. The inert liquid used is heat-resistant silicone oil or synthetic mineral oil.

EFFECT: high output of microspheres and reduced swelling in oil.

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