POLYTHIOETHER POLYMERS AND CURABLE COMPOSITIONS BASED THEREON Russian patent published in 2012 - IPC C08G75/04 C08G75/02 C08L81/02 C09K3/10 

FIELD: chemistry.

SUBSTANCE: described is a polymer having a structure of formula: , in which R¹ is independently selected from a C_2-10 n-alkylene group, a C_2-6 branched alkylene group, a C_6-8 cycloalkylene group, a C_6-10 alkylcycloalkylene group, -[(-CH₂-)_p-X-]_q-(-CH₂-)_r- or -[(-CH₂-)_p-X-]_q-(-CH₂-)_r-, wherein at least one -CH₂- unit is substituted with a methyl group, p is an integer having a value ranging from 2 to 6, q is an integer having a value ranging from 1 to 5, r is an integer having a value ranging from 2 to 10, and X is selected from O, S, and -NR-, where R is hydrogen or methyl; R² denotes a structure of formula ; R³ is independently selected from hydrogen and an alkyl group; n is an integer having a value ranging from 1 to 60; and m is a rational number having a value ranging from 1 to 10. The polymer is obtained using a method involving reaction of a compound containing at least two reactive thiol groups with allyl(meth)acrylate. Described also is a method of producing said polymer, wherein (>n) moles of polythiol react with (n) moles of allyl(meth)acrylate in the presence of a catalyst. Also described are curable compositions for a coating, sealant and adhesive, containing said polymer. Described is a method for at least partial coating or sealing a substrate with said curable composition involving: (a) depositing the curable composition on at least part of the substrate and (b) curing the composition. Described also are curable compositions for a coating, sealant and adhesive.

EFFECT: improved composition.

25 cl, 1 tbl, 4 ex