METHOD OF PREPARING BASE POLYMER SOLUTION FOR PRODUCING HALOBUTYL RUBBER Russian patent published in 2013 - IPC C08J3/11 C08F210/12 C08F6/24 

FIELD: chemistry.

SUBSTANCE: method involves dissolving wet crumbs of butyl rubber in a hydrocarbon solvent by feeding wet rubber crumbs, solvent, feeding and removing a base polymer solution and removing water into a hollow apparatus having a mixing, a dissolving and a settling zone. The rubber crumbs are dissolved by circulating the base polymer solution collected in the top part of the apparatus into the bottom parts of dissolving zone and the mixing zone. The ratio of the volume of the dissolving zone to that of the mixing zone is equal to 7-8:1, and the ratio of the height to the diameter of the apparatus in the dissolving zone is equal to 6-7 and in the settling zone 1-2.

EFFECT: low power consumption when dissolving and high quality of the obtained solution, specifically: low drop in Mooney viscosity of the dissolved rubber, reduced amount of water and solvent and reduced amount of swollen rubber in the solution.

1 cl, 1 tbl, 1 dwg, 16 ex