# US 2019/0315201 A1 · Laminated glass > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0315201 A1 - Document ID: US20190315201A1 - Status: Published application - Kind: A1 - Application number: 16/467,164 - Filed: 2017-12-15 - Published: 2019-10-17 - Earliest claimed: 2016-12-22 - Assignees: Zeon Corporation - Applicants: Zeon Corporation - Inventors: Ryuta KURIHARA; Teiji KOHARA - Web page: https://patentgrep.com/patent/US20190315201A1 ## CPC - B60J 1/00: Windows; Windscreens; Accessories therefor (B60J10/00 takes precedence; air curtains instead of windows B60J9/04 {; sealing strips for windshields B60J10/70; sealing sash guides for sliding window panes B60J10/74; glass partitions inside vehicles to protect occupants against personal attack B60R21/12}) - B32B 17/10036: {comprising two outer glass sheets} - B32B 17/1055: {characterized by the resin layer, i.e. interlayer} - B32B 17/10688: {Adjustment of the adherence to the glass layers} - B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers} - C08L 53/025: {modified} - B32B 2605/00: Vehicles - B32B 2605/08: Cars - B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Provided is a laminated glass where multiple glass sheets are joined via an interlayer film [J], wherein i) mean density of the laminated glass is 1.2-1.5 g/cm3 at 25° C., ii) the interlayer film [J] has layered structure comprising at least two adhesive layers [G], comprising an adhesive mainly containing a thermoplastic elastomer having an alkoxysilyl group [F]; and at least one rigid resin layer [H] positioned therebetween, iii) storage modulus of the rigid resin layer [H] is higher than that of the adhesive layer [G], iv) storage modulus of the interlayer film [J] calculated from a formula 1 or measured is 2.0×108-1.0×109 Pa at −20° C. and 1.0×108-8.0×108 Pa at 40° C., G′=(Σiti)/(Σi(ti/G′i)) (1) where G′: calculated storage modulus of the interlayer film, G′i: storage modulus of an i-th layer of the interlayer film, ti: thickess of the i-th layer, Σi: sum of numerical values of the i-th layer. ## Claims ### Claim 1 A laminated glass in which a plurality of glass sheets is joined together with an interlayer film J in between, wherein i) a mean density of the laminated glass is in a range from 1.2 to 1.5 g/cm3 at a temperature of 25° C., ii) the interlayer film J has layered structure comprising at least two adhesive layers G and at least one rigid resin layer H positioned between the two adhesive layers G, the adhesive layer G comprising an adhesive that mainly contains a thermoplastic elastomer having an alkoxysilyl group F, iii) a storage modulus of the rigid resin layer H has a higher value than a storage modulus of the adhesive layer G, and iv) a storage modulus of the interlayer film J, which is either calculated from a following formula 1 or measured, is in a range from 2.0×108 to 1.0×109 Pa at a temperature of −20° C. and 1.0×108 to 8.0×108 Pa at a temperature of 40° C., G′=(Σiti)/(Σi(ti/G′i)) (1) where G′ is the calculated storage modulus of the interlayer film, G′i is the storage modulus of an i-th layer in the interlayer film, ti is a thickness of the i-th layer, and Σi is a sum of numerical values of the i-th layer. ### Claim 2 (depends on 1) The laminated glass according to claim 1, wherein the thermoplastic elastomer having an alkoxysilyl group F comprises at least two polymer blocks A and at least one polymer block B, the polymer block A mainly containing a structural unit derived from an aromatic vinyl compound, while the polymer block B mainly containing a structural unit derived from a chain conjugated diene compound, and wherein the thermoplastic elastomer having an alkoxysilyl group F comprises a modified hydrogenated block copolymer E resulted from introducing the alkoxysilyl group into a hydrogenated block copolymer D deriving from hydrogenation of a block copolymer C, the block copolymer C having a ratio between wA and wB as wA:wB of 30:70 to 60:40 where wA denotes a weight fraction of a total amount of the polymer block A accounting for the whole block copolymer C while wB denotes a weight fraction of a total amount of the polymer block B accounting for the whole block copolymer C. ### Claim 3 (depends on 1) The laminated glass according to claim 1, wherein the thermoplastic elastomer having an alkoxysilyl group F comprises at least two polymer blocks A and at least one polymer block B, the polymer block A mainly containing a structural unit derived from an aromatic vinyl compound, while the polymer block B mainly containing a structural unit derived from a chain conjugated diene compound, and wherein the thermoplastic elastomer having an alkoxysilyl group F comprises a modified hydrogenated block copolymer E resulted from introducing the alkoxysilyl group into a hydrogenated block copolymer D deriving from 95% or more of hydrogenation of carbon-carbon unsaturated bonds in a main chain and a side chain as well as of carbon-carbon unsaturated bonds in aromatic rings of a block copolymer C, the block copolymer C having a ratio between wA and wB as wA:wB of 30:70 to 60:40 where wA denotes a weight fraction of a total amount of the polymer block A accounting for the whole block copolymer C while wB denotes a weight fraction of a total amount of the polymer block B accounting for the whole block copolymer C. ### Claim 4 (depends on 1) The laminated glass according to claim 1, wherein the rigid resin layer H comprises a layer comprising at least one rigid resin selected from the group consisting of hydrogenated block copolymer S comprising, in a molecule, a polymer block having a repeat unit derived from an aromatic vinyl compound and a polymer block having a repeat unit derived from a chain conjugated diene compound; polycarbonate; polyester-based resin; polyacrylic acid ester-based resin; and polymethacrylic acid ester-based resin. ### Claim 5 (depends on 4) The laminated glass according to claim 4, wherein the hydrogenated block copolymer S comprises at least two polymer blocks P and at least one polymer block Q, the polymer block P mainly containing a structural unit derived from an aromatic vinyl compound, while the polymer block Q mainly containing a structural unit derived from a chain conjugated diene compound, and wherein the hydrogenated block copolymer S is derived from 95% or more of hydrogenation of carbon-carbon unsaturated bonds in a main chain and a side chain as well as of carbon-carbon unsaturated bonds in aromatic rings of a block copolymer R, the block copolymer R having a ratio between wP and wQ as wP:wQ of 50:50 to 70:30 where wP denotes a weight fraction of a total amount of the polymer block P accounting for the whole block copolymer R while wQ denotes a weight fraction of a total amount of the polymer block Q accounting for the whole block copolymer R. ### Claim 6 (depends on 2) The laminated glass according to claim 2, wherein the rigid resin layer H comprises a layer comprising at least one rigid resin selected from the group consisting of hydrogenated block copolymer S comprising, in a molecule, a polymer block having a repeat unit derived from an aromatic vinyl compound and a polymer block having a repeat unit derived from a chain conjugated diene compound; polycarbonate; polyester-based resin; polyacrylic acid ester-based resin; and polymethacrylic acid ester-based resin. ### Claim 7 (depends on 3) The laminated glass according to claim 3, wherein the rigid resin layer H comprises a layer comprising at least one rigid resin selected from the group consisting of hydrogenated block copolymer S comprising, in a molecule, a polymer block having a repeat unit derived from an aromatic vinyl compound and a polymer block having a repeat unit derived from a chain conjugated diene compound; polycarbonate; polyester-based resin; polyacrylic acid ester-based resin; and polymethacrylic acid ester-based resin.