ENCAPSULATED ACTIVATOR AND THEREOF APPLICATION FOR INITIATION OF GAS-GENERATING SYSTEM BY PHYSICAL MEANS Russian patent published in 2016 - IPC C09K8/516 E21B33/13 

FIELD: chemistry.

SUBSTANCE: group of the inventions relates to method for encapsulation of polymerisation accelerator and water gelling systems, which contain encapsulated polymerisation accelerator with water-soluble or dispersible monomers. Method includes stages of obtaining reverse emulsion, containing in oil phase, water solution or dispersion (W1), containing said polymerisation accelerator. Oil phase is (or, at least, includes) thermally curable mixture of isocyanate and hydroxylated polyalkyldiene or polyatomic alcohol. After that, said reverse emulsion is poured into water phase (W2) to obtain multi-phase emulsion water/oil/water, containing drops of accelerator as internal water phase. Then, said multiphase emulsion is heated at temperature from 50 to 95°C to cure said thermally curable mixture in polyurethane and obtain drops of accelerator, enclosed in polyurethane envelopes, dispersed in water.

EFFECT: increased efficiency of sealing of underground media, or soil reinforcement, or sealing underground structures.

17 cl, 7 tbl, 4 ex