# US 9,435,913 B2 · Interlayer for laminated glass, and laminated glass > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,913 B2 - Document ID: US9435913B2 - Status: Granted - Kind: B2 - Application number: 13/817,611 - Filed: 2011-08-19 - Published: 2013-08-01 - Granted: 2016-09-06 - Earliest claimed: 2010-08-20 - Assignees: Sekisui Chemical Co., Ltd.; Asahi Glass Company, Limited - Applicants: Bungo Hatta; Kazuhiko Nakayama; Minoru Inada; Yuji Masaki; Jun Hikata - Inventors: Bungo Hatta; Kazuhiko Nakayama; Minoru Inada; Yuji Masaki; Jun Hikata - Web page: https://patentgrep.com/patent/US9435913B2 ## CPC - G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence) - B32B 17/10036: {comprising two outer glass sheets} - B32B 17/10568: {varying in thickness} - B32B 17/10678: {comprising UV absorbers or stabilizers, e.g. antioxidants} - B32B 17/10688: {Adjustment of the adherence to the glass layers} - B32B 17/10761: {containing vinyl acetal} - C08K 5/3417: condensed with carbocyclic rings - C08K 5/3475: condensed with carbocyclic rings - G02B 5/223: {containing organic substances, e.g. dyes, inks or pigments} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract An interlayer film for laminated glass that suppresses the transmittance of ultraviolet rays with a wave length of 400 nm to 1% or less, and has high light resistance. The interlayer film for laminated glass comprises a thermoplastic resin, an ultraviolet absorber having a structure of formula (1), and an ultraviolet absorber having a structure of formula (2), wherein the amount of the ultraviolet absorber of formula (1) is 0.001 to 0.05% by weight, and the amount of the ultraviolet absorber of formula (2) is 0.5 to 1.0% by weight; wherein R1 is a C1-3 alkyl group; R2 is hydrogen, a C1-10 alkyl group, or a C7-10 aralkyl group; R3 is hydrogen or a C1-8 alkyl group; and R4 is hydrogen or a C1-8 alkyl group. ## Claims ### Claim 1 An interlayer film for laminated glass comprising: a thermoplastic resin, an ultraviolet absorber having a structure of the following formula (1), and an ultraviolet absorber having a structure of the following formula (2), wherein an amount of the ultraviolet absorber having the structure of formula (1) is 0.001 to 0.05% by weight, and an amount of the ultraviolet absorber having the structure of formula (2) is 0.5 to 1.0% by weight; wherein R1 is a C1-3 alkyl group; R2 is hydrogen, a C1-10 alkyl group, or a C7-10 aralkyl group; R3 is hydrogen or a C1-8 alkyl group; and R4 is hydrogen or a C1-8 alkyl group. ### Claim 2 (depends on 1) The interlayer film for laminated glass according to claim 1, further comprising triethylene glycol di-2-ethylhexanoate. ### Claim 3 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the thermoplastic resin is a polyvinyl acetal resin. ### Claim 4 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the thermoplastic resin is a polyvinyl butyral resin. ### Claim 5 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the amount of the ultraviolet absorber having the structure of formula (1) is 0.01 to 0.04% by weight, and the amount of the ultraviolet absorber having the structure of formula (2) is 0.6 to 1.0% by weight. ### Claim 6 (depends on 1) The interlayer film for laminated glass according to claim 1, further comprising an infrared absorbing agent. ### Claim 7 (depends on 6) The interlayer film for laminated glass according to claim 6, wherein the infrared absorbing agent is made of tin-doped indium oxide particles. ### Claim 8 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein a cross-section of the interlayer film for laminated glass is a wedge shape with a wedge angle θ of 0.1 to 1.0 mrad. ### Claim 9 (depends on 1) The interlayer film for laminated glass according to claim 1, comprising a sound-insulation layer. ### Claim 10 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein at least one part of the interlayer film for laminated glass is colored. ### Claim 11 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein a yellowness index is 5 or less when the interlayer film for laminated glass is set to have a thickness of 760 μm and sandwiched between two glass plates. ### Claim 12 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein a visible light transmission Tv is 70% or more after the interlayer film for laminated glass is set to have a thickness of 760 μm, sandwiched between two glass plates, and irradiated with ultraviolet rays for 2,000 hours using an ultraviolet rays irradiation device in accordance with JIS R 3205 (1998). ### Claim 13 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein a yellowness index is 5 or less after the interlayer film for laminated glass is set to have a thickness of 760 μm, sandwiched between two glass plates, and irradiated with ultraviolet rays for 2,000 hours using an ultraviolet ray irradiation device in accordance with JIS R 3205 (1998). ### Claim 14 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the interlayer film for laminated glass has an absolute value of 1 or less, where the absolute value is given by the difference between the transmittance of ultraviolet rays with a wave length of 400 nm of the interlayer film for laminated glass, after being set to have a thickness of 760 μm and sandwiched between two glass plates, and the transmittance of ultraviolet rays with a wave length of 400 nm of the interlayer film for laminated glass, after being set to have a thickness of 760 μm, sandwiched between two glass plates, and irradiated with ultraviolet rays for 2,000 hours using an ultraviolet ray irradiation device in accordance with JIS R 3205 (1998). ### Claim 15 (depends on 1) A laminated glass comprising: the interlayer film for laminated glass according to claim 1, and two glass plates, wherein the interlayer film for laminated glass is sandwiched between the two glass plates. ### Claim 16 (depends on 15) The laminated glass according to claim 15, wherein the glass plates are made of 2-mm-thick green glass.