Interlayer Film for Glass Laminate and Glass Laminate

• US 20070224340A1
• Filed: 06/01/2005
• Published: 09/27/2007
• Est. Priority Date: 06/01/2004
• Status: Abandoned Application

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Fukatani, Juichi, Hatta, Bungo
• Application Number:
  US11/597,639
• Publication Number:
  US 20070224340A1
• Time in Patent Office: Days
• US Class Current: 427/160
• CPC Class Codes: B32B 17/10678 comprising UV absorbers or stabilizers, e.g. antioxidants
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: C08J 2329/14 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: C08J 5/18 Manufacture of films or sheets
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/259 Silicic material

Abstract

An interlayer film for glass laminate that even when the glass laminate is exposed to strong sunlight for a prolonged period of time, is resistant to lowering of light transmittance and yellowing of the interlayer film per se, having heat shielding property. There is provided an interlayer film for glass laminate, comprising a matrix resin, a liquid plasticizer and heat shielding particles having their surface coated with an insulating inert substance.

Claims

1. An interlayer film for glass laminate comprising:

a matrix resin;

a liquid plasticizer; and

heat shielding fine particles coated with an insulating inert substance.

2. The interlayer film for glass laminate according to claim 1, wherein the insulating inert substance has a band gap energy of 5.0 eV or higher.

3. The interlayer film for glass laminate according to claim 1, wherein a visible light transmittance variation (Δ

Tv) calculated after irradiation with super UV light for 300 hours by the following formula (1) is 0% or higher, and wherein a reflective yellow index value variation (Δ

YI) calculated after irradiation with super UV light for 300 hours by the following formula (2) is 0 or a negative value.

4. The interlayer film for heat shielding glass laminate according to claim 1, wherein the heat shielding fine particles coated with an insulating inert substance are tin-doped indium oxide fine particles coated with a phosphate and/or antimony-doped tin oxide fine particles coated with a phosphate.

5. The interlayer film for glass laminate according to claim 4, wherein a visible light transmittance variation (Δ

Tv) calculated after irradiation with super UV light for 300 hours by the following formula (1) is 0% or higher, and wherein a reflective yellow index value variation (Δ

YI) calculated after irradiation with super UV light for 300 hours by the following formula (2) is 0 or a negative value.

visible light transmittance variation (Δ

Tv)=(visible light transmittance measured after irradiation with super UV light)−

(visible light transmittance measured before irradiation with super UV light) 

 

Formula (1)
reflective YI value variation (Δ

YI)=(reflective yellow index value measured after irradiation with super UV light)−

(reflective yellow index value measured before irradiation with super UV light)  

 

Formula (2)

6. The interlayer film for glass laminate according to claim 4 or 5, wherein the phosphate is at least one selected from the group consisting of hydroxyapatite, carbonate apatite, fluorapatite, tricalcium phosphate, and octacalcium phosphate.

7. The interlayer film for heat shielding glass laminate according to claim 4 or 5, wherein the phosphate is at least one selected from the group consisting of ammonium phosphomolybdate, ammonium phosphotungstate, and ammonium phosphovanadate.

8. The interlayer film for glass laminate according to claim 1, wherein the heat shielding fine particles coated with an insulating inert substance are tin-doped indium oxide fine particles coated with an insulating metal oxide having an band gap energy of 5.0 eV or higher and/or antimony-doped tin oxide fine particles coated with an insulating metal oxide having an band gap energy of 5.0 eV or higher.

9. The interlayer film for glass laminate according to claim 8, wherein a visible light transmittance variation (Δ

Tv) calculated after irradiation with super UV light for 300 hours by the following formula (1) is 0% or higher, and wherein a reflective yellow index value variation (Δ

YI) calculated after irradiation with super UV light for 300 hours by the following formula (2) is 0 or a negative value.

visible light transmittance variation (Δ

Tv)=(visible light transmittance measured after irradiation with super UV light)−

(visible light transmittance measured before irradiation with super UV light) 

 

Formula (1)
reflective YI value variation (Δ

YI)=(reflective yellow index value measured after irradiation with super UV light)−

(reflective yellow index value measured before irradiation with super UV light) 

 

Formula (2)

10. The interlayer film for glass laminate according to claim 8 or 9, wherein the inert substance is at least one selected from the group consisting of silicon oxide, aluminum oxide, and zirconium oxide.

14. A glass laminate obtained by using the interlayer film for glass laminate according to any one of claims 15, 8, 9, 11 and 12.

11. An interlayer film for heat shielding glass laminate comprising:

a matrix resin;

a plasticizer; and

tin-doped indium oxide fine particles coated with an organosilicon compound represented by the following formula (A);

Si(OR¹)_aR²_b (where R¹ represents an alkyl group, R² represents an organic functional group containing an alkyl group, a polyoxyalkylene group, a phenyl group, a styryl group, a (meth)acryloxy group, an epoxy group, a vinyl group, an isocyanate group, a mercapto group, a ureido group or the like, and a and b are each an integer of 1 to 3, provided that a+b is 4, and/or antimony-doped tin oxide fine particles coated with an organosilicon compound represented by the above formula (A).

12. The interlayer film for glass laminate according to claim 11, wherein a visible light transmittance variation (Δ

Tv) calculated after irradiation with super UV light for 300 hours by the following formula (1) is 0% or higher, and wherein a reflective yellow index value variation (Δ

YI) calculated after irradiation with super UV light for 300 hours by the following formula (2) is 0 or a negative value.

visible light transmittance variation (Δ

Tv)=(visible light transmittance measured after irradiation with super UV light)−

(visible light transmittance measured before irradiation with super UV light) 

 

Formula (1)
reflective YI value variation (Δ

YI)=(reflective yellow index value measured after irradiation with super UV light)−

(reflective yellow index value measured before irradiation with super UV light) 

 

Formula (2)

13. The interlayer film for glass laminate according to claim 11 or 12, wherein the organosilicon compound is an aromatic organosilicon compound.