	US 12,331,228 B2
	Photocurable resin composition, cured product, and laminated body
Yusuke Kuwahara, Tokyo (JP)
Assigned to THREEBOND CO., LTD., Tokyo (JP)
Filed by THREEBOND CO., LTD., Tokyo (JP)
Filed on Oct. 21, 2021, as Appl. No. 17/507,211.
Claims priority of application No. 2020-187535 (JP), filed on Nov. 10, 2020.
Prior Publication US 2022/0145150 A1, May 12, 2022
Int. Cl. C09J 175/14 (2006.01); C08L 75/14 (2006.01); C09J 7/30 (2018.01)

CPC C09J 175/14 (2013.01) [C08L 75/14 (2013.01); C09J 7/30 (2018.01); C09J 2475/00 (2013.01)]

18 Claims

1. A photocurable resin composition, wherein

a reaction force at 10% compression of a cured product is 1 to 300 kPa,

a reaction force at 50% compression of the cured product is 1 to 500 kPa, and

wherein the photocurable resin composition does not include a monofunctional (meth)acrylic monomer having a hydroxyl group, and

the photocurable resin composition consists of components (A) to (D) below, and optionally at least one selected from the group consisting of components (E) to (G) below:

component (A): a hollow organic resin filler,

component (B): a monofunctional urethane (meth)acrylate,

component (C): a monofunctional (meth)acrylic monomer other than the component (B),

component (D): a photo-radical polymerization initiator,

component (E): a plasticizer having no (meth)acryloyl group,

component (F): a bifunctional or higher polyfunctional (meth)acrylic monomer, and

component (G): an inorganic filler,

a true specific gravity of the hollow organic resin filler is 0.07 to 0.30 g/cm³, and

the monofunctional (meth)acrylic monomer is at least one selected from the group consisting of methoxydiethylene glycol mono(meth)acrylate, methoxytriethylene glycol mono(meth)acrylate, methoxytetraethylene glycol mono(meth)acrylate, methoxypentaethylene glycol mono(meth)acrylate, methoxyhexaethylene glycol mono(meth)acrylate, methoxyheptaethylene glycol mono(meth)acrylate, methoxytripropylene glycol mono(meth)acrylate, methoxytetrapropylene glycol mono(meth)acrylate, methoxypentapropylene glycol mono(meth)acrylate, methoxyhexapropylene glycol mono(meth)acrylate, methoxyheptapropylene glycol mono(meth)acrylate, methoxytributylene glycol mono(meth)acrylate, methoxytetrabutylene glycol mono(meth)acrylate, methoxypentabutylene glycol mono(meth)acrylate, methoxyhexabutylene glycol mono(meth)acrylate, methoxyheptabutylene glycol mono(meth)acrylate, ethoxydiethylene glycol mono(meth)acrylate, ethoxytriethylene glycol mono(meth)acrylate, ethoxytetraethylene glycol mono(meth)acrylate, ethoxypentaethylene glycol mono(meth)acrylate, ethoxyhexaethylene glycol mono(meth)acrylate, ethoxyheptaethylene glycol mono(meth)acrylate, ethoxytripropylene glycol mono(meth)acrylate, ethoxytetrapropylene glycol mono(meth)acrylate, ethoxypentapropylene glycol mono(meth)acrylate, ethoxyhexapropylene glycol mono(meth)acrylate, ethoxyheptapropylene glycol mono(meth)acrylate, ethoxytributylene glycol mono(meth)acrylate, ethoxytetrabutylene glycol mono(meth)acrylate, ethoxypentabutylene glycol mono(meth)acrylate, ethoxyhexabutylene glycol mono(meth)acrylate, and ethoxyheptabutylene glycol mono(meth)acrylate.

8. A cured product of the photocurable resin composition set forth in claim 1.

9. A laminated body comprising: a first adherend; a second adherend; and the cured product set forth in claim 8, wherein the laminated body has a configuration in which the first adherend and the second adherend are bonded to each other with the cured product interposed therebetween.