Patent RU-2670901-C1 (RU)
Title: Options for use of uv-curing sealants based on polythioethers for sealing of fastening devices and for leveling of surfaces
Inventor: VIRNELSON BRUCE
IPC: C09D181/02
Filed: 2013-10-09
Granted: 2018-10-25
Abstract: FIELD: chemistry.SUBSTANCE: invention relates to compositions of UV-curable sealants. Sealant composition for smoothing a surface defect is described, comprising: (i) polythioether having terminal thiol groups, comprising a terminal thiol group, polythioether of formula (II), polythioether of formula (III), or combination thereof: HS-R-[-S-(CH)-O-[-R-O-]-(CH)-S-R-]-SH (II); B-(A-[R]-SH)(III), where (1) each Rindependently is Cn-alkanediyl group, Cbranched alkanediyl group, Ccycloalkanediyl group, Calkanecycloalkanediyl group, -[(-CH-)-X-]-(-CH-)- or -[(-CH-)-X-]-(-CH-)-, where at least one -CH- is substituted by a methyl group, wherein: (i) each X is independently selected from O, S and -NR-, where Rrepresents a hydrogen atom or methyl; (ii) p is an integer having a value in the range of from 2 to 6; (iii) q is an integer having a value in the range of 0 to 5; and (iv) r is an integer having a value in the range of from 2 to 10; (2) each Rindependently is Cn-alkanediyl group, Cbranched alkanediyl group, Ccycloalkanediyl group, Calkanecycloalkanediyl group or -[(-CH-)-X-]-(-CH-)-, where: (i) each X is independently selected from O, S and -NR-, where Rrepresents a hydrogen atom or methyl; (ii) p is an integer having a value in the range of from 2 to 6; (iii) q is an integer having a value in the range of 0 to 5; and (iv) r is an integer having a value in the range of from 2 to 10; (3) m is a rational number in the range from 0 to 10; and (4) n is an integer having a value in the range of 1 to 60; (5) A stands for a structure described by the formula: -R-[-S-(CH)-O-[-R-O-]-(CH)-S-R-]-, in which (I) each Rindependently is Cn-alkanediyl group, Cbranched alkanediyl group, Ccycloalkanediyl group, Calkanecycloalkanediyl group, -[(-CH-)-X-]-(-CH-)- or -[(-CH-)-X-]-(-CH-)-, where at least one -CH- is substituted by a methyl group, wherein: (i) each X is independently selected from O, S and -NR-, where Rrepresents a hydrogen atom or methyl; (ii) p is an integer having a value in the range of from 2 to 6; (iii) q is an integer having a value in the range of 0 to 5; and (iv) r is an integer having a value in the range of from 2 to 10; (II) each Rindependently is Cn-alkanediyl group, Cbranched alkanediyl group, Ccycloalkanediyl group, Calkanecycloalkanediyl group or -[(-CH-)-X-]-(-CH-)-, where: (i) each X is independently selected from O, S and -NR-, where Rrepresents a hydrogen atom or methyl; (ii) p is an integer having a value in the range of from 2 to 6; (iii) q is an integer having a value in the range of 0 to 5; and (iv) r is an integer having a value in the range of from 2 to 10; (III) m is a rational number in the range of 0 to 10; and (IV) n is an integer having a value in the range of from 1 to 60; (6) y is 0 or 1; (7) Rmeans a single bond, when y = 0, and -S-(CH)-[-O-R-]-O-, where y = 1; (8) z is an integer ranging from 3 to 6; and (9) B is the z-valent residue of the polyfunctionalizing agent; (ii) a compound containing terminal alkenyl groups comprising a polyvinyl ether and/or a polyallyl compound; and (iii) from 1 to 60 % by weight a filler that is capable of transmitting UV radiation, wherein the weight percent is based on the total weight of the sealant composition; sealant composition at least partially transmits ultraviolet radiation and is ultraviolet curable. Method for equalizing a defect on a surface, an aerospace or aerial vehicle surface aligned using the method is also described.EFFECT: composition of an aerosol sealant with high performance characteristics is proposed.20 cl, 8 dwg, 8 tbl, 18 ex