LAMINATED GLASS INTERLAYER AND LAMINATED GLASS

• US 20130183532A1
• Filed: 09/30/2011
• Published: 07/18/2013
• Est. Priority Date: 09/30/2010
• Status: Active Grant

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Shimamoto, Michio, Matsuda, Shota, Yang, Sinyul, Kani, Kohei, Iwamoto, Tatsuya
• Granted Patent: US 8,741,439 B2
• Time in Patent Office: Days
• US Class Current: 428/442
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10605 Type of plasticiser
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B60J 3/007 Sunglare reduction by coatings, interposed foils in laminar windows, or permanent screens layered glass products B32B17/00; process of coating windows C03C17/00
• CPC Class Codes: C08K 2201/014 Additives containing two or more different additives of the same subgroup in C08K
• CPC Class Codes: C08K 5/0016 Plasticisers
• CPC Class Codes: C08L 29/14 Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
• CPC Class Codes: Y10T 428/31627 Next to aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31649 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31859 Next to an aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31942 Of aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31946 Next to second aldehyde or ketone condensation product

Abstract

The present invention aims to provide an intermediate film for laminated glass which, in the case of being used for constituting a laminated glass, enables to improve the sound-insulating property of the obtained laminated glass, and a laminated glass. The intermediate film 1 for laminated glass of the present invention comprises a first layer 2 which contains a polyvinyl acetal resin and a plasticizer, and the polyvinyl acetal resin and the first plasticizer are a polyvinyl acetal resin and a first plasticizer which have a cloud point of 5° C. or lower when the cloud point is measured using a solution prepared by dissolving 8 parts by weight of the polyvinyl acetal resin in 100 parts by weight of the first plasticizer; and the laminated glass 11 of the present invention comprises first and second components for laminated glass, and the intermediate film 1 for laminated glass sandwiched between the first and second components for laminated glass.

Claims

1. An intermediate film for laminated glass with a single layer structure or a laminated structure of two or more layers, comprising:

a first layer containing a polyvinyl acetal resin and a plasticizer,

wherein the plasticizer contained in the first layer contains a first plasticizer, and

the polyvinyl acetal resin and the first plasticizer contained in the first layer are a polyvinyl acetal resin and a first plasticizer which have a cloud point of 5°

C. or lower when the cloud point is measured using a solution prepared by dissolving 8 parts by weight of the polyvinyl acetal resin in 100 parts by weight of the first plasticizer.

2. The intermediate film for laminated glass according to claim 1,

wherein the polyvinyl acetal resin and the first plasticizer contained in the first layer are a polyvinyl acetal resin and a first plasticizer which have a cloud point of 0°

C. or lower when the cloud point is measured using a solution prepared by dissolving 8 parts by weight of the polyvinyl acetal resin in 100 parts by weight of the first plasticizer.

3. The intermediate film for laminated glass according to claim 1,

wherein the plasticizer contained in the first layer further contains a second plasticizer that is different from the first plasticizer.

4. The intermediate film fin laminated glass according to claim 3,

wherein the polyvinyl acetal resin and the second plasticizer contained in the first layer are a polyvinyl acetal resin and a second plasticizer which have a cloud point exceeding 5°

C. when the cloud point is measured using a solution prepared by dissolving 8 parts by weight of the polyvinyl acetal resin in 100 parts by weight of the second plasticizer.

5. The intermediate film kin laminated glass according to claim 1.

wherein the plasticizer contained in the first layer contains or does not contain a second plasticizer that is different from the first plasticizer, and

the amount of the first plasticizer is 1% by weight or more and the amount of the second plasticizer is 99% by weight or less in 100% by weight in total of all the plasticizers contained in the first layer.

6. The intermediate film for laminated glass according to claim 1,

wherein the plasticizer contained in the first layer contains a second plasticizer that is different from the first plasticizer, and

the amount of the first plasticizer is 1% by weight or more and 99% by weight or less, and the amount of the second plasticizer is 1% by weight or more and 99% by weight or less, in 100% by weight in total of all the plasticizers contained in the first layer.

7. The intermediate film for laminated glass according to claim 1,

wherein a peak temperature of tan δ

that exists at the lowest-temperature side measured at a frequency of 1 Hz is 0°

C. or lower.

8. The intermediate film for laminated glass according to claim 1,

wherein a maximum value of tan δ

at a peak temperature of tan δ

that exists at the lowest-temperature side measured at a frequency of 1 Hz is 1.15 or higher.

9. The intermediate film for laminated glass according to claim 1,

wherein a maximum value of tan δ

at a peak temperature of tan δ

that exists at the highest-temperature side measured at a frequency of 1 Hz is 0.55 or higher.

10. The intermediate film for laminated glass according to claim 1,

wherein a degree of acetylation of the polyvinyl acetal resin contained in the first layer exceeds 30 mol %.

11. The intermediate film for laminated glass according to claim 1,

wherein a degree of acetylation of the polyvinyl acetal resin contained in the first layer is 10 to 45 mol % and a hydroxy group content thereof is 35 mol % or lower.

12. The intermediate film for laminated glass according to claim 1,

wherein an SP value of the first plasticizer contained in the first layer is 13.5 to 14.5.

13. The intermediate film for laminated glass according to claim 1,

wherein the plasticizer contained in the first layer is a diester plasticizer represented by the following formula (1):

14. The intermediate film for laminated glass according to claim 13,

wherein the first plasticizer contained in the first layer is a diester plasticizer represented by the following formula (1A):

15. The intermediate film for laminated glass according to claim 13,

wherein the plasticizer contained in the first layer contains a second plasticizer that is different from the first plasticizer, and

the second plasticizer contained in the first layer is a diester plasticizer represented by the following formula (1B):

16. The intermediate film for laminated glass with a laminated structure of two or more layers according to claim 1, further comprising

a second layer which is laminated on a first surface of the first layer and which contains a polyvinyl acetal resin and a plasticizer,

wherein the total amount of all the plasticizers is 50 parts by weight or more for each 100 parts by weight of the polyvinyl acetal resin in the first layer,

a hydroxy group content in the polyvinyl acetal resin contained in the first layer is lower than a hydroxy group content in the polyvinyl acetal resin contained in the second layer,

the difference between the hydroxy group content in the polyvinyl acetal resin contained in the first layer and the hydroxy group content in the polyvinyl acetal resin contained in the second layer is 9.2 mol % or smaller, and

the degree of acetylation of the polyvinyl acetal resin contained in the first layer is 8 mol % or lower if the difference between the hydroxy group content in the polyvinyl acetal resin contained in the first layer and the hydroxy group content in the polyvinyl acetal resin contained in the second layer is greater than 8.5 mol % but not greater than 9.2 mol %.

17. The intermediate film for laminated glass according to claim 1,

wherein the polyvinyl acetal resin contained in the first layer contains a high-molecular-weight component with an absolute molecular weight of 1,000,000 or higher and a proportion of the high-molecular-weight component in the polyvinyl acetal resin contained in the first layer is 7,4% or higher, or

the polyvinyl acetal resin contained in the first layer contains a high-molecular-weight component with a molecular weight in terms of polystyrene of 1,000,000 or higher and a proportion of the high-molecular-weight component in the polyvinyl acetal resin contained in the first layer is 9% or higher.

18. The intermediate film for laminated glass according to claim 1,

wherein a ratio (G′

(Tg+80)/G′

(Tg+30)) of an elastic modulus G′

(Tg+80) at (Tg+80)°

C. to an elastic modulus G′

(Tg+30) at (Tg+30)°

C. is 0.65 or higher, provided that the first layer is used as a resin film and a viscoelasticity of the resin film is measured, and that Tg (°

C.) represents a glass transition temperature of the resin film.

19. The intermediate film for laminated glass according to claim 1,

wherein a ratio (G′

(Tg+80)/G′

(Tg+30)) of an elastic modulus G′

(Tg+80) at (Tg+80)°

C. to an elastic modulus G′

(Tg+30) at (Tg+30)°

C. is 0.65 or higher, provided that a resin film containing 100 parts by weight of the polyvinyl acetal resin contained in the first layer and 60 parts by weight of triethylene glycol di-2-ethyl hexanoate (3GO) as a plasticizer is prepared and a viscoelasticity of the resin film is measured, and that Tg (°

C.) represents a glass transition temperature of the resin film.

20. The intermediate film for laminated glass according to claim 1,

wherein the polyvinyl acetal resin contained in the first layer is obtained by acetalizing polyvinyl alcohol having an average degree of polymerization exceeding 3,000.

21. The intermediate film for laminated glass according to claim 1,

wherein a degree of acetylation of the polyvinyl acetal resin contained in the first layer is 8 mol % or higher, or

a degree of acetylation of the polyvinyl acetal resin contained in the first layer is lower than 8 mol % and a degree of acetalization thereof is 68 mol % or higher.

22. The intermediate film for laminated glass according to claim 21,

wherein the degree of acetylation of the polyvinyl acetal resin contained in the first layer is 8 mol % or higher.

23. The intermediate film for laminated glass according to claim 21,

wherein the degree of acetylation of the polyvinyl acetal resin contained in the first layer is lower than 8 mol %, and a degree of acetalization thereof is 68 mol % or higher.

24. The intermediate film for laminated glass according to claim 1, comprising:

the first layer;

a second layer which is laminated on a first surface of the first layer and which contains a polyvinyl acetal resin and a plasticizer; and

a third layer which is laminated on a second surface that is opposite to the first surface of the first layer and which contains a polyvinyl acetal resin and a plasticizer.

25. The intermediate film for laminated glass according to claim 24,

wherein a carbon number of an acetal group of each of the polyvinyl acetal resins contained in the second layer and the third layer is 3 or 4, a degree of acetylation thereof is 60 to 75 mol %, and a degree of acetylation thereof is 10 mol % or lower.

26. The intermediate film for laminated glass according to claim 24,

wherein the amount of the plasticizer is 5 to 50 parts by weight for each 100 parts by weight of the polyvinyl acetal resin in each of the second layer and the third layer.

27. A laminated glass, comprising;

a first component for laminated glass;

a second component for laminated glass; and

an intermediate film sandwiched between the first component for laminated glass and the second component for laminated glass,

wherein the intermediate film is the intermediate film for laminated glass according to claim 1.