IP Library Granted Patent US 12663677
Granted Patent B2
US 12663677 · App. 18/767,195 · Granted Jun 23, 2026

Dimming laminate and resin spacer for dimming laminate

Inventors: Yasuyuki Yamada (Shiga, JP); Hideyuki Takahashi (Shiga, JP); Saori Ueda (Shiga, JP); Minoru Nakajima (Shiga, JP)
Assignee: SEKISUI CHEMICAL CO., LTD.
G02F1/1339B32B5/16B32B17/10036B32B27/20B32B2264/02B32B2307/40B32B2457/202G02F1/13398
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Quick Facts
Patent No.
US 12663677
App. No.
18/767,195
Granted
Jun 23, 2026
Kind
B2
Abstract

Provided is a dimming laminate which can effectively suppress occurrence of color unevenness and light omission. The dimming laminate according to the present invention includes a first transparent base material, a second transparent base material, and a dimming layer disposed between the first transparent base material and the second transparent base material. In this dimming laminate, the dimming layer includes a resin spacer, the resin spacer is a plurality of resin particles, and the resin spacer does not contain resin particles having a particle diameter of 1.4 times or more an average particle diameter of the resin particles or contains 0.0006% or less of the resin particles having a particle diameter of 1.4 times or more the average particle diameter of the resin particles, relative to 100% of the whole number of the resin particles.

Claims (18)

1 . A dimming laminate comprising:

a first transparent base material;

a second transparent base material; and

a dimming layer disposed between the first transparent base material and the second transparent base material,

the dimming layer comprising a resin spacer,

the resin spacer being a plurality of resin particles,

the 10% K value of the resin particles being 7000 N/mm 2 or less,

the resin spacer comprising no resin particles having a particle diameter of 1.4 times or more an average particle diameter of the resin particles or comprising 0.0006% or less of the resin particles having the particle diameter of 1.4 times or more the average particle diameter of the resin particles, relative to 100% of a whole number of the resin particles, and

the dimming laminate having a curved surface portion, a curvature of the curved surface portion of the dimming laminate being 30CR or more and 180CR or less.

2 . The dimming laminate according to claim 1 , wherein the resin spacer comprises no resin particles having a particle diameter of 1.7 times or more the average particle diameter of the resin particles.

3 . The dimming laminate according to claim 1 , wherein the resin spacer comprises no resin particles having a particle diameter of 0.5 times or less the average particle diameter of the resin particles or comprises 0.5% or less of the resin particles having the particle diameter of 0.5 times or less the average particle diameter of the resin particles, relative to 100% of the whole number of the resin particles.

4 . The dimming laminate according to claim 1 , wherein the average particle diameter of the resin particles is 3 μm or more and 100 μm or less.

5 . The dimming laminate according to claim 1 , wherein each of the resin particles comprises a pigment.

6 . A resin spacer for a dimming laminate, the resin spacer being a plurality of resin particles,

the 10% K value of the resin particles being 7000 N/mm 2 or less,

the resin spacer comprising no resin particles having a particle diameter of 1.4 times or more an average particle diameter of the resin particles or comprising 0.0006% or less of the resin particles having the particle diameter of 1.4 times or more the average particle diameter of the resin particles, relative to 100% of a whole number of the resin particles, and

the dimming laminate having a curved surface portion, a curvature of the curved surface portion of the dimming laminate being 30CR or more and 180CR or less.

7 . The resin spacer for a dimming laminate according to claim 6 , comprising the resin particles, a number of which is 1 million or more.