Laminated glass interlayer and laminated glass

Patent metadata

Field	Value
Publication number	US-9764534-B2
Application number	US-201414256997-A
Country	US
Kind code	B2
Filing date	Apr 21, 2014
Priority date	Sep 30, 2010
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

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.

First claim

The invention claimed is:

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
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, 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, and
the total amount of the plasticizer in the first layer is 40 parts by weight or more for each 100 parts by weight of the polyvinyl acetal resin in the first layer.

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

11. 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):

wherein R1 and R2 each represent a C 1 -C 10 organic group; R3 represents an ethylene group, an isopropylene group, or an n-propylene group; and p represents an integer of 2 to 10.

12. The intermediate film for laminated glass according to claim 11 ,
wherein the first plasticizer contained in the first layer is a diester plasticizer represented by the following formula (1A):

wherein R1 and R2 each represent a C 2 -C 5 organic group; R3 represents an ethylene group, an isopropylene group, or an n-propylene group; and p represents an integer of 2 to 10.

13. The intermediate film for laminated glass according to claim 11 ,
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):

wherein R1 and R2 each represent a C 6 -C 10 organic group; R3 represents an ethylene group, an isopropylene group, or an n-propylene group; and p represents an integer of 2 to 10.

14. 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, and
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.

15. 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.

16. 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.

17. 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 aceta

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Shimamoto Michio
• Matsuda Shota
• Yang Sinyul
• Kani Kohei
• Iwamoto Tatsuya

Classifications

• Y10T428/3163

  Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.] · CPC title

• Y10T428/31946

  Next to second aldehyde or ketone condensation product · CPC title

• B32B2250/03

  3 layers · CPC title

• C08K5/0016

  Plasticisers · CPC title

• C08L29/14

  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 title