# US 2013/0157065 A1 · Intermediate film 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 2013/0157065 A1 - Document ID: US20130157065A1 - Status: Published application - Kind: A1 - Application number: 13/809,885 - Filed: 2011-07-15 - Published: 2013-06-20 - Earliest claimed: 2010-07-16 - Assignees: Sekisui Chemical Co., Ltd. - Inventors: Michio Shimamoto; Shota Matsuda; Sinyul Yang; Etsurou Hirota; Kohei Kani; Tatsuya Iwamoto - Web page: https://patentgrep.com/patent/US20130157065A1 ## CPC - C08K 5/11: of acyclic polycarboxylic acids - B32B 17/10036: {comprising two outer glass sheets} - B32B 17/10605: {Type of plasticiser} - B32B 17/10688: {Adjustment of the adherence to the glass layers} - B32B 17/10761: {containing vinyl acetal} - C08K 5/0016: {Plasticisers} - C08K 5/103: with polyalcohols - B32B 2250/03: 3 layers - C08K 2201/014: Additives containing two or more different additives of the same subgroup in C08K - Y10T 428/31627: Next to aldehyde or ketone condensation product - Y10T 428/3163: Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.] - Y10T 428/31649: Ester, halide or nitrile of addition polymer - Y10T 428/31859: Next to an aldehyde or ketone condensation product - Y10T 428/31942: Of aldehyde or ketone condensation product - Y10T 428/31946: Next to second aldehyde or ketone condensation product - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention provides an interlayer film for laminated glass which can give a laminated glass with better sound insulation when used in the laminated glass. The present invention provides an interlayer film for laminated glass having a monolayer structure comprising only a first layer or a multilayer structure comprising at least two layers including a first layer and a second layer stacked at least on one face of the first layer, wherein the first layer contains a thermoplastic resin and a first plasticizer represented by the formula (1): and the interlayer film has a monolayer structure or a multilayer structure including at least two layers and includes the first layer further containing a second plasticizer that is a diester compound, or the interlayer film has a multilayer structure including at least two layers and includes the second layer containing a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %. ## Claims ### Claim 1 An interlayer film for laminated glass having a monolayer structure comprising only a first layer or a multilayer structure comprising at least two layers including a first layer and a second layer stacked at least on one face of the first layer, wherein the first layer contains a thermoplastic resin and a first plasticizer represented by the formula (1): in which R1 and R2 each represent an organic group containing at least one ether bond and n represents an integer of 2 to 8, and the interlayer film has a monolayer structure or a multilayer structure including, at least two layers and includes the first layer further containing a second plasticizer that is a diester compound, or the interlayer film has a multilayer structure including at least two layers and includes the second layer containing a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %. ### Claim 2 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein R1 and R2 in the formula (1) each represent a group containing a carbon atom and an oxygen atom in a total number of at most 12. ### Claim 3 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein R1 and R2 in the formula (1) each have at least one ether bond structural unit represented by the formula (11): or the formula (12): ### Claim 4 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein, in the formula (1), R1 is a group represented by the formula (21): in which R21 represents an alkyl group having 1 to 10 carbon atom(s), R22 represents an alkylene group having 1 to 10 carbon atom(s), and m1 represents an integer of 1 to 5, and R2 is a group represented by the formula (26): in which R26 represents an alkyl group having 1 to 10 carbon atom(s), R27 represents an alkylene group having 1 to 10 carbon atom(s), and m2 represents an integer of 1 to 5. ### Claim 5 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein, when the interlayer film has a monolayer structure or a multilayer structure including at least two layers and includes the first layer further containing a second plasticizer that is a diester compound, the second plasticizer is represented by the formula (51): in which R51 and R52 each represent an organic group having 5 to 10 carbon atoms, R53 represents an ethylene group, isopropylene group, or n-propylene group, and p represents an integer of 3 to 10. ### Claim 6 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein, when the interlayer film has a monolayer structure or a multilayer structure including at least two layers and includes the first layer further containing, a second plasticizer that is a diester compound, the first layer contains the first plasticizer and the second plasticizer at a weight ratio of 1:9 to 8.5:1.5. ### Claim 7 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein, when the interlayer film has a multilayer structure including at least two layers and includes the second layer containing a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %, the plasticizer in the second layer is a second plasticizer that is a diester compound. ### Claim 8 (depends on 7) The interlayer film for laminated glass according to claim 7, wherein the second plasticizer that is a diester compound in the second layer is represented by the formula (51): in which R51 and R52 each represent an organic group having 5 to 10 carbon atoms, R53 represents an ethylene group; isopropylene group or n-propylene group, and p represents an integer of 3 to 10. ### Claim 9 (depends on 1) The interlayer film for laminated glass according, to claim 1, wherein, when the interlayer film has a multilayer structure including at least two layers and includes the second layer containing a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %, the first layer further contains a second plasticizer that is a diester compound. ### Claim 10 (depends on 9) The interlayer film for laminated glass according to claim 9, wherein the second plasticizer that is a diester compound in the first layer is represented by the formula (51): in which R51 and R52 each represent an organic group having 5 to 10 carbon atoms, R53 represents an ethylene group, isopropylene group or n-propylene group, and p represents an integer of 3 to 10. ### Claim 11 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein, when the interlayer film has a multilayer structure including at least two layers and includes the second layer containing a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %, the first layer further contains a second plasticizer that is a diester compound and the first layer contains the first plasticizer and the second plasticizer at a weight ratio of 1:9 to 8.5:1.5. ### Claim 12 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein, when the interlayer film has as multilayer structure including at least two layers and includes the second layer containing a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %, the polyvinyl acetal resin in the second layer has an acetal group with 3 or 4 carbon atoms, an acetalization degree of 60 to 75 mol %, and an acetylation degree of 0 to 10 mol %. ### Claim 13 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the thermoplastic resin in the first layer is a polyvinyl acetal resin. ### Claim 14 (depends on 13) The interlayer film for laminated glass according to claim 13, wherein the polyvinyl acetal resin in the first layer has a hydroxyl content of at most 25 mol %. ### Claim 15 (depends on 13) The interlayer film for laminated glass according to claim 13, wherein the polyvinyl acetal resin in the first layer is obtained by acetalization of a polyvinyl alcohol having an average degree of polymerization of 2700 to 5000. ### Claim 16 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the thermoplastic resin in the first layer contains a high molecular weight component having an absolute molecular weight of at least 1 million and the high molecular weight component accounts for at least 7.4% of the thermoplastic resin in the first layer, or the thermoplastic resin in the first layer contains a high molecular weight component having a polystyrene-equivalent molecular weight of at least 1 million and the high molecular weight component accounts for at least 9% of the thermoplastic resin in the first layer. ### Claim 17 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein, when the first layer is used as a resin film with a glass transition temperature of Tg (° C.) for measurement of the viscoelasticity, an elasticity G′(Tg+80) at (Tg+80)° C. and an elasticity G′(Tg+30) at (Tg+30)° C. have a ratio (G′(Tg+80)/G′(Tg+30)) of at least 0.65. ### Claim 18 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the thermoplastic resin in the first layer is a polyvinyl acetal resin, and when the viscoelasticity of a resin film containing 100 parts by weight of the polyvinyl acetal resin in the first layer and 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer and having a glass transition temperature of Tg (° C.) for measurement of the viscoelasticity, an elasticity G′(Tg+80) at (Tg+80)° C. and an elasticity G′(Tg+30) at (Tg+30)° C. have a ratio (G′(Tg+80)/G′(Tg+30)) of at least 0.65. ### Claim 19 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the thermoplastic resin in the first layer is a polyvinyl acetal resin, and the polyvinyl acetal resin in the first layer is obtained by acetalization of a polyvinyl alcohol resin having an average degree of polymerization of more than 3000. ### Claim 20 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the thermoplastic resin in the first layer is a polyvinyl acetal resin, and the polyvinyl acetal resin in the first layer has an acetylation degree of at least 8 mol %, or an acetylation degree of less than 8 mol % and an acetalization degree of at least 68 mol %. ### Claim 21 (depends on 20) The interlayer film for laminated glass according to claim 20, wherein the polyvinyl acetal resin in the first layer has ara acetylation degree of at least 8 mol %. ### Claim 22 (depends on 20) The interlayer film for laminated glass according to claim 20, wherein the polyvinyl acetal resin in the first layer has an acetylation degree of less than 8 mol % and an acetalization degree of at least 68 mol %. ### Claim 23 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the interlayer film has a monolayer structure or a multilayer structure including at least two layers, and the interlayer film includes the first layer containing the thermoplastic resin, the first plasticizer represented by the formula (1), and the second plasticizer that is a diester compound. ### Claim 24 (depends on 23) The interlayer film for laminated glass according to claim 23, wherein the interlayer film has a monolayer structure, and the interlayer film includes the first layer containing the thermoplastic resin, the first plasticizer represented by the formula (1), and the second plasticizer that is a diester compound. ### Claim 25 (depends on 23) The interlayer film for laminated glass according to claim 23, wherein the interlayer film has a multi layer structure including at least two layers, and the interlayer film includes the first layer containing the thermoplastic resin, the first plasticizer represented by the formula (1), and the second plasticizer that is a diester compound, and the second layer stacked at least on one face of the first layer. ### Claim 26 (depends on 1) The inter layer film for laminated glass according to claim 1, wherein the interlayer film has a multilayer structure including at least two layers, and the interlayer film includes the first layer containing the thermoplastic resin and the first plasticizer represented by the formula (1), and the second layer that is stacked at least on one face of the first layer and contains the plasticizer and the polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %. ### Claim 27 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the interlayer film has a multilayer structure including at least two layers, the thermoplastic resin in the first layer is a polyvinyl acetal resin, the second layer contains a polyvinyl acetal resin, the amount of the plasticizer is at least 50 parts by weight for 100 parts by weight of the polyvinyl acetal resin in the first layer, a hydroxyl content in the polyvinyl acetal resin in the first layer is lower than a hydroxyl content in the polyvinyl acetal resin in the second layer, a difference in the hydroxyl content is at most 9.2 mol % between the polyvinyl acetal resin in the first layer and the polyvinyl acetal resin in the second layer, and the polyvinyl acetal resin in the first layer has an acetylation degree of at most 8 mol % when the difference in the hydroxyl content is more than 8.5 mol % and at most 9.2 mol % between the polyvinyl acetal resin in the first layer and the polyvinyl acetal resin in the second layer. ### Claim 28 (depends on 1) A laminated glass comprising: a first component for laminated glass; a second component for laminated glass; an interlayer film between the first component for laminated glass and the second component for laminated glass, wherein the interlayer film includes the interlayer film for laminated glass according to claim 1. ### Claim 29 (depends on 1) The interlayer film for laminated glass according to claim 1, wherein the interlayer film has a multilayer structure comprising at least two layers including a first layer and a second layer stacked at least on one face of the first layer, the interlayer film includes the first layer containing a polyvinyl acetal resin and a first plasticizer represented by the formula (1): in which R1 and R2 each represent an organic group containing at least one ether bond and n represents an integer of 2 to 8, and the second layer stacked at least on one face of the first layer, the first layer further contains a second plasticizer that is a diester compound and the second layer contains a plasticizer and a polyvinyl acetal resin, or the second layer contains a plasticizer and a polyvinyl acetal resin with a hydroxyl content of 25 to 40 mol %, and a hydroxyl content in the polyvinyl acetal resin in the first layer is lower than a hydroxyl content in the polyvinyl acetal resin in the second layer.