Film for glass lamination, composition for film for glass lamination, and laminated glass comprising same

Patent metadata

Field	Value
Publication number	US-11618243-B2
Application number	US-202117167403-A
Country	US
Kind code	B2
Filing date	Feb 4, 2021
Priority date	Aug 16, 2018
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A film for laminating glass including: a first surface layer; a second surface layer disposed opposite to the first surface layer; and at least one sound insulating layer disposed between the first surface layer and the second surface layer, wherein the film for laminating glass has a L/F value reduction rate [G_L/F(A,B)] of 0.07/° C. or less at a temperature range of 20 to 35° C.

First claim

What is claimed is:

1. A film for laminating glass, comprising:
a first surface layer;
a second surface layer disposed opposite to the first surface layer; and
at least one sound insulating layer disposed between the first surface layer and the second surface layer,
wherein the film for laminating glass has a L/F value reduction rate [G_L/F(A,B)] of 0.07/° C. or less at a temperature range of 20 to 35° C., and
wherein the L/F value reduction rate is calculated according to Equation (1) below:

G_L
⁢

/

⁢

F
⁡

(

A
,
B

)

=

L
⁢

/

⁢

F
⁡

(
A
)

-

L
⁢

/

⁢

F
⁡

(
B
)

L
⁢

/

⁢

F
⁡

(
A
)

×

⁢

1

B
-
A

Equation
⁢

⁢

(
1
)

where the L/F(A) and the L/F(B) are loss factor L/F values of a laminated glass comprising the film for laminating glass at A (° C.) and B (° C.), respectively,
where A is a minimum temperature (° C.) within the temperature range, and B is a maximum temperature (° C.) within the temperature range,
wherein the at least one sound insulating layer comprises a trioxane-based compound,

wherein the trioxane-based compound is one or more of a trioxane-based compound having 1,3,5-trioxane skeleton, a trioxane-based compound having 1,2,4-trioxane skeleton, or a trioxane-based compound having 1,2,3-trioxane skeleton, and
wherein the trioxane-based compound having 1,3,5-trioxane skeleton has a structure of Formula 1 below;

where, R 1 , R 2 and R 3 are independently hydrogen or alkyl group having 3 to 5 carbon atoms, respectively, with the proviso that at least one of R 1 , R 2 and R 3 is not hydrogen.

2. The film for laminating glass of claim 1 , wherein the L/F value reduction rate [G_L/F(A,B)], where A is 20° C. and B is 35° C., is 0.040/° C. or less.

3. The film for laminating glass of claim 1 , wherein the L/F value reduction rate [G_L/F(A,B)], where A is 25° C. and B is 30° C., is 0.06/° C. or less.

4. The film for laminating glass of claim 1 , wherein the L/F value reduction rate [G_L/F(A,B)], where A is 30° C. and B is 35° C., is 0.06/° C. or less.

5. The film for laminating glass of claim 1 , wherein the film for laminating glass has a difference of 0.23 or less between the L/F(A) and the L/F(B).

6. The film for laminating glass of claim 1 , wherein the film for laminating glass has a loss factor L/F value at 30° C. of 0.18 or more.

7. The film for laminating glass of claim 1 , wherein the sound insulating layer is a monolayer.

8. The film for laminating glass of claim 1 , wherein the at least one sound insulating layer comprises a plasticizer in an amount of 29 to 42 wt % based on a total weight of the at least one sound insulating layer.

9. The film for laminating glass of claim 1 , wherein the trioxane-based compound having 1,3,5-trioxane skeleton is trialkyl trioxane selected from the group consisting of 2,4,6-tri(n-propyl)-1,3,5-trioxane, 2,4,6-tri(iso-propyl)-1,3,5-trioxane, 2,4,6-tri(n-butyl)-1,3,5-trioxane, 2,4,6-tri(sec-butyl)-1,3,5-trioxane, 2,4,6-tri(isobutyl)-1,3,5-trioxane, 2,4,6-tri(tert-butyl)-1,3,5-trioxane, 2,4,6-tripentyl-1,3,5-trioxane, and combinations thereof.

10. The film for laminating glass of claim 9 , wherein the trioxane-based compound having 1,3,5-trioxane skeleton is tripropyl trioxane selected from the group consisting of 2,4,6-tri(n-propyl)-1,3,5-trioxane, 2,4,6-tri(iso-propyl)-1,3,5-trioxane, and combinations thereof.

11. The film for laminating glass of claim 1 , wherein the trioxane-based compound is comprised in an amount of 0.001 to 10 wt % based on a total weight of the at least one sound insulating layer.

12. The film for laminating glass of claim 1 , wherein the film for laminating glass has a loss factor L/F value at 20° C. of 0.32 or more.

13. The film for laminating glass of claim 1 , wherein the at least one sound insulating layer has a thickness of 10 to 20% based on a total thickness of the film for laminating glass.

14. A laminated glass comprising a film for laminating glass disposed between two light transmitting panels, wherein the film for laminating glass comprises:
a first surface layer;
a second surface layer disposed opposite to the first surface layer; and
at least one sound insulating layer disposed between the first surface layer and the second surface layer,
wherein the film for laminating glass has a L/F value reduction rate [G_L/F(A,B)] of 0.07/° C. or less at a temperature range of 20 to 35° C., an

Assignees

• Skc Co Ltd

Inventors

• Kim Hyejin
• Kim Kyuhun
• Chung Sungjin

Classifications

• B32B2307/102

  Insulating · CPC title

• B32B2250/05

  5 or more layers · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title

• B32B27/18

  characterised by the use of special additives · CPC title

• C03C27/10

  with the aid of adhesive specially adapted for that purpose · CPC title