POLYMER POLYTHIOETHERS, METHODS OF THEIR OBTAINING AND COMPOSITIONS, CONTAINING THEM Russian patent published in 2015 - IPC C08G75/02 C08G75/12 C09J181/02 C08L81/02 C09K3/10 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to polythioethers. Described is a polythioether, containing a product of reaction of reagents, containing: a) isocyanurate-containing trithiol, which has the structure in which each R represents C_2-6 alkylene; b) dithiol, described by formula: HS-R¹-SH, where R¹ represents -[(-CH₂-)_p-O-]_q-(-CH₂-)_r-, where p represents an integer number, which has a value in the range from 2 to 6, q represents an integer number, which has a value in the range from 1 to 5, and r represents an integer number, which has a value in the range from 2 to 10; and c) divinyl ether, described by formula: CH₂=CH-O-(-R⁵-O)_m-CH=CH₂, in which m represents a rational number from 0 to 10; and R⁵ represents a C_2-6 n-alkylene group, C_2-6 branched alkylene group, C_6-8 cycloalkylene group, C_6-10 alkylcycloalkylene group or -[(-CH₂-)_p-O-]_q-(-CH₂-)_r-, where p represents an integer number, which has a value in the range from 2 to 6, q represents an integer number, which has a value in the range from 1 to 5, and r represents an integer number, which has a value in the range from 2 to 10; with the said polythioether representing a liquid at room temperature, and with the polythioether being characterised by an average functionality from 2.1 to 2.8. Also described is a composition, containing the said polythioether, described is an aerospace flying apparatus, including at least one hole sealed with a sealant, precipitated from the said composition. Also described is the polythioether, described by formula: in which: (A) each Y, which can be identical to other Y or be different from them, includes the following structure -[-(CH₂)₂-O-(R²-O)_m-(CH₂)₂-S-R¹-S-]_n-, in which R¹ represents -[(-CH₂)_p-O-]_q-(-CH₂)_r-, where p represents an integer number, which has a value in the range from 2 to 6, q represents an integer number, which has a value in the range from 1 to 5, and r represents an integer number, which has a value in the range from 2 to 10; and R² represents a C_2-6 n-alkylene group, C₂-C₆ branched alkylene group, C₆-C₈ cycloalkylene group, C₆-C₁₂ alkylcycloalkylene group, or -[(-CH₂)_p-O-]_q-(-CH₂)_r-, where p represents an integer number in the range from 2 to 6; q represents an integer number in the range from 1 to 5; r represents an integer number in the range from 2 to 10; m represents a rational number from 0 to 10; and n represents an integer number in the range from 1 to 60; (B) each R represents a C_2-6 n-alkylene and can be identical to other R or be different from them.

EFFECT: obtaining the polythioether, characterised by considerably improved sealing properties.

6 cl, 2 tbl, 2 ex