US 11,724,481 B2
Interlayer film for laminated glass, and laminated glass
Shinji Kawada, Osaka (JP); and Yuki Ishikawa, Osaka (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP)
Appl. No. 17/620,888
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP)
PCT Filed Nov. 20, 2019, PCT No. PCT/JP2019/045501
§ 371(c)(1), (2) Date Dec. 20, 2021,
PCT Pub. No. WO2021/002033, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 2019-123788 (JP), filed on Jul. 2, 2019.
Prior Publication US 2022/0363039 A1, Nov. 17, 2022
Int. Cl. B32B 17/10 (2006.01); B32B 27/08 (2006.01); B32B 27/22 (2006.01); B32B 27/30 (2006.01)
CPC B32B 17/10743 (2013.01) [B32B 17/10036 (2013.01); B32B 17/10605 (2013.01); B32B 17/10678 (2013.01); B32B 17/10706 (2013.01); B32B 17/10761 (2013.01); B32B 27/08 (2013.01); B32B 27/22 (2013.01); B32B 27/306 (2013.01); B32B 27/308 (2013.01); B32B 2307/732 (2013.01); B32B 2419/00 (2013.01); B32B 2605/006 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An interlayer film for laminated glass having a one-layer or two or more-layer structure, comprising:
a first layer containing a thermoplastic (meth)acrylic polymer,
wherein the interlayer film for laminated glass satisfies at least one configuration selected from the group consisting of a Configuration (A), a Configuration (B), a Configuration (C) and a Configuration (D), as follows:
Configuration (A): the thermoplastic (meth)acrylic polymer contained in the first layer is a thermoplastic (meth)acrylic polymer having a gel fraction of 5% by weight or less;
Configuration (B): the thermoplastic (meth)acrylic polymer contained in the first layer is a thermoplastic (meth)acrylic polymer having a molecular weight distribution ratio of weight average molecular weight to number average molecular weight of 1 or more and 6 or less, and a gel fraction of 10% by weight or less;
Configuration (C): the thermoplastic (meth)acrylic polymer contained in the first layer is a thermoplastic (meth)acrylic polymer having a molecular weight distribution ratio of weight average molecular weight to number average molecular weight of 1 or more and 6 or less, and the thermoplastic (meth)acrylic polymer contained in the first layer is a polymer contained in a cured product obtained by curing a polymerizable composition containing a (meth)acrylic monomer and a photopolymerization initiator by irradiation with an active energy ray;
Configuration (D): the thermoplastic (meth)acrylic polymer contained in the first layer is a thermoplastic (meth)acrylic polymer having a gel fraction of 5% by weight or less, and the thermoplastic (meth)acrylic polymer contained in the first layer is a polymer contained in a cured product obtained by curing a polymerizable composition containing a (meth)acrylic monomer and a photopolymerization initiator by irradiation with an active energy ray.