ALIPHATIC POLYCARBONATE-BASED SURFACE ACTIVE AGENTS Russian patent published in 2018 - IPC C08G64/02 C08G64/34 C09K8/58 C09K8/584 C09K8/588 

FIELD: chemistry.

SUBSTANCE: present invention relates to surfactants useful in liquid or supercritical CO₂ application. Said surfactant comprises a group of aliphatic polycarbonate and hydrocarbon, linked through an oxygen atom, wherein the surfactant comprises a compound of formula:

,

where R¹, R², R³ and R⁴ at each occurrence in the polymer chain are independently selected from the group consisting of -H, fluorine, optionally substituted C_1-40 aliphatic group, optionally substituted C_1-20 heteroaliphatic group and optionally substituted aryl group, where any two or more R¹, R², R³ and R⁴ may optionally be taken together with intervening atoms to form one or more optionally substituted rings optionally containing one or more heteroatoms; group contains a saturated or unsaturated hydrocarbon; Y is selected from the group consisting of -H, optionally substituted C_1-12 aliphatic group, optionally substituted aryl, optionally substituted C_1-12 acyl, -SO₂R, -SiR₃ and a polyether chain, wherein R is, independently at each occurrence, optionally substituted aryl or optionally substituted C_1-12 aliphatic group; and n is an integer greater than 1 to 50.

EFFECT: technical result is the preparation of a surfactant soluble in CO₂, which has improved physical and interfacial tension properties.

14 cl, 17 tbl, 11 ex