Glass laminates comprising acoustic interlayers and solar control films

• US 7,968,186 B2
• Filed: 07/03/2007
• Issued: 06/28/2011
• Est. Priority Date: 07/03/2007
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Rymer, Donald L., Hayes, Richard A.
• Primary Examiner(s): NAKARANI, DHIRAJLAL S
• Application Number:
  US11/825,041
• Publication Number:
  US 20090011230A1
• Time in Patent Office: 1,456 Days
• Field of Search: 428/332, 428/436, 428/437, 428/441, 428/442, 428/339
• US Class Current: 428/339
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• 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 428/31645 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31649 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

An acoustic solar control laminate comprising a multi-layer interlayer formed of a solar control film bonded between two polymeric sheets with at least one being an acoustic poly(vinyl acetal) sheet is provided.

Claims

1. An acoustic solar control laminate consisting of:

(a) a first rigid sheet;

(b) a first polymeric sheet;

(c) a polymeric film, which is coated on at least one side with an infrared energy reflective layer;

(d) a second polymeric sheet; and

(e) a second rigid sheet;

wherein the first rigid sheet is adhered to the first polymeric sheet;

the first polymeric sheet is adhered to the polymeric film;

the polymeric film is adhered to the second polymeric sheet; and

the second polymeric sheet is adhered to the second rigid sheet;

and further wherein the first polymeric sheet comprises an acoustic poly(vinyl acetal) composition having a glass transition temperature of 23°

C. or less, said acoustic poly(vinyl acetal) composition comprising a plasticizer and a poly(vinyl acetal), said poly(vinyl acetal) being produced by acetalizing a poly(vinyl alcohol) with one or more aldehydes containing 4 to 6 carbon atoms, said poly(vinyl acetal) having an acetalization degree of at least about 50 mole %, and said poly(vinyl acetal) having a saponification degree of at least 95 mole %, based on the total number of moles of vinyl groups in the poly(vinyl acetal); and

wherein the first and the second rigid sheets are each formed of a material having a modulus of at least about 100,000 psi (690 MPa).

2. The acoustic solar control laminate of claim 1, wherein the aldehyde is n-butyl aldehyde and the poly(vinyl acetal) is a polyvinyl butyral).

3. The acoustic solar control laminate of claim 1, wherein the acoustic poly(vinyl acetal) composition comprises a poly(vinyl acetal) and about 40 to about 60 parts per hundred (pph) of a plasticizer, based on 100 parts by weight of the poly(vinyl acetal).

4. The acoustic solar control laminate of claim 3, wherein the poly(vinyl acetal) is a poly(vinyl butyral).

5. The acoustic solar control laminate of claim 1, wherein the acoustic poly(vinyl acetal) sheet has a thickness of at least about 0.25 mm.

6. The acoustic solar control laminate of claim 5, wherein the acoustic poly(vinyl acetal) sheet has a thickness of about 0.38 to about 1.74 mm.

7. The acoustic solar control laminate of claim 1, wherein the second polymeric sheet comprises a second acoustic poly(vinyl acetal) composition having a glass transition temperature of 23°

C. or less, and wherein the acoustic poly(vinyl acetal) compositions in the first and second polymeric sheets may be the same or different.

8. The acoustic solar control laminate of claim 1, wherein the polymeric film comprises a polyester.

9. The acoustic solar control laminate of claim 8, wherein the polymeric film comprises a poly(ethylene terephthalate).

10. The acoustic solar control laminate of claim 1, wherein the infrared energy reflective layer comprises a metal layer or a Fabry-Perot type interference filter layer.

11. The acoustic solar control laminate of claim 1, wherein each of the first and second rigid sheets comprises a material selected from glasses and polymers having a modulus of about 100,000 psi (690 MPa) or greater, and wherein the materials of the first and second rigid sheets may be the same or different.

12. The acoustic solar control laminate of claim 11, wherein the first and second rigid sheets are glass sheets.

13. The acoustic solar control laminate of claim 1, wherein the second polymeric sheet comprises a second acoustic poly(vinyl acetal) composition having a glass transition temperature of 23°

C. or less; and

wherein the first and second acoustic poly(vinyl acetal) compositions may be the same or different.