Polymer interlayers comprising blends of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester

• US 7,901,780 B2
• Filed: 06/25/2008
• Issued: 03/08/2011
• Est. Priority Date: 06/25/2008
• Status: Active Grant

• Current Assignee: Solutia Incorporated (Eastman Chemical Company)
• Original Assignee: Solutia Incorporated (Eastman Chemical Company)
• Inventors: Karagiannis, Aristotelis, D'Errico, John Joseph, Szydlowski, Witold, Chen, Wenjie
• Primary Examiner(s): Chen; Vivian
• Application Number:
  US12/146,410
• Publication Number:
  US 20090324969A1
• Time in Patent Office: 986 Days
• Field of Search: None
• US Class Current: 428/430
• CPC Class Codes: B32B 17/10009 characterized by the number, the constitution or treatment of glass sheets
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/10779 containing polyester
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/3065 Flame resistant or retardant, fire resistant or retardant
• CPC Class Codes: B32B 2307/402 Coloured
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/518 bi-axially
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2605/08 Cars
• CPC Class Codes: B32B 2607/00 Walls, panels
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• 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: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: Y10T 156/1089 : of discrete laminae to single face of additional lamina
• CPC Class Codes: Y10T 156/1092 : All laminae planar and face to face
• CPC Class Codes: Y10T 428/31551 : Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31565 : Next to polyester [polyethylene terephthalate, etc.]
• CPC Class Codes: Y10T 428/31576 : Ester monomer type [polyvinylacetate, etc.]
• CPC Class Codes: Y10T 428/31616 : Next to polyester [e.g., alkyd]
• CPC Class Codes: Y10T 428/31645 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31786 : Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31909 : Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31913 : Monoolefin polymer
• CPC Class Codes: Y10T 428/31928 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31935 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31938 : Polymer of monoethylenically unsaturated hydrocarbon

Abstract

It has now been discovered, according to the present invention, that interlayers comprising a blend of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester can be used to form interlayers having a pearly white appearance. Such interlayers are useful in applications in which a colored multiple layer glass interlayer is desirable.

Claims

1. A laminated glass interlayer, comprising:

a polymer sheet comprising a blend of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester, wherein said polymer sheet comprises 5 to 95 weight percent of said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyster and 95 to 5 weight percent of said plasticized poly(vinyl butyral);

and wherein said plasticized poly(vinyl butyral) has 5 to 60 parts of plasticizer per one hundred parts of poly(vinyl butyral) resin (phr);

wherein said polymer sheet has a pearlescent appearance; and

wherein said pearlescent appearance is caused solely by said blend of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester.

2. The interlayer of claim 1, wherein said polymer sheet comprises 10 to 90 weight percent of said poly(cyclohexanedirnethylene terephthalate-co-ethylene terephthalate) copolyester and 90 to 10 weight percent of said plasticized poly(vinyl butyral).

3. The interlayer of claim 1, wherein said polymer sheet comprises 20 to 40 weight percent of said poly(cyclohexanedimethylene terephthate-co-ethylene terephthalate) copolyester 80 to 60 weight percent of said plasticized poly(vinyl butyral).

4. The interlayer of claim 3, wherein said polymer sheet comprises 30 weight percent of said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester and 70 weight percent of said plasticized poly(vinyl butyral)), and wherein said polymer sheet has pearly white appearance.

5. The interlayer of claim 1, wherein said polymer sheet comprises poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester comprising at least 10% by weight of poly(ethylene terephthalate) component by weight.

6. The interlayer of claim 1, wherein said polymer sheet comprises poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester comprising at least 20% by weight of poly(ethylene terephthalate) component by weight.

7. The interlayer of claim 1, wherein said polymer sheet has glass transition temperature 55°

C. or less.

8. A laminated glass panel comprising:

a rigid glazing substrate; and

,

a laminated glass interlayer in contact with said substrate, said interlayer comprising;

a polymer sheet comprising a blend of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester;

wherein said polymer sheet comprises 5 to 95 weight percent of said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester and 95 to 5 weight percent of said plasticized poly(vinyl butyral);

wherein said plasticized poly(vinyl butyral) has 5 to 60 parts of plasticizer per one hundred parts of poly(vinyl butyral) resin (phr); and

wherein said glass panel has a pearlescent appearance, and wherein said pearlescent appearance is caused solely by said blend of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester.

9. The panel of claim 8, wherein said polymer sheet comprises 10 to 90 weight percent of said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester and 90 to 10 weight percent of said plasticized poly(vinyl butyral).

10. The panel of claim 8, wherein said polymer sheet comprises 20 to 40 weight percent of said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester and 80 to 60 weight percent of said plasticized poly(vinyl butyral).

11. The panel of claim 8, wherein said polymer sheet comprises poly(cyclohexanedimethylene terephthalate-co-terephthalate) copolyester comprising at least 10% by weight of poly(ethylene terephthalate) component by weight.

12. The panel of claim 8, wherein said polymer sheet comprises poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester comprising at least 20% by weight of poly(ethylene terephthalate) component by weight.

13. The panel of claim 8, wherein said interlayer further comprises a polymer sheet, comprising a member selected from the group consisting of polyurethane, polyvinyl chloride, poly(ethylene-co-vinyl acetate), polyethylene, polyethylene copolymers, and partially neutralized ethylene/(meth)acrylic copolymers.

14. A method of making a polymer sheet, comprising:

providing plasticized poly(vinyl butyral) pellets;

providing poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester resin;

melt mixing said pellets and said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester resin to form a blended resin; and

extruding said blended resin to form said polymer sheet;

wherein said polymer sheet comprises 5 to 95 weight percent of said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester and 95 to 5 weight percent weight of said plasticized poly(vinyl butyral);

wherein said plasticized poly(vinyl butyral) has 5 to 60 parts of plasticizer per one hundred parts of poly(vinyl butyral) resin (phr);

wherein said polymer sheet has a pearlescent appearance; and

wherein said pearlescent appearance is caused solely by said blend of elasticized polyvinyl butyral) and poly(cyclohexanedimethylene) terephthalate-co-ethylene terephthalate copolyester.

15. A method of manufacturing a multiple layer glass panel comprising:

forming a stack by disposing a polymer sheet as an interlayer between two panes of glass,

said polymer sheet comprising a blend of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester;

wherein said polymer sheet comprises 5 to 95 weight percent of said poly poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester and 95 to 5 weight percent of said plasticized poly(vinyl butyral);

wherein said plasticized poly(vinyl butyral) has 5 to 60 parts of plasticizer per one hundred parts of poly(vinyl butyral) resin (phr);

laminating the stack to produce the multiple layer glass panel;

wherein said glass panel has a pearlescent appearance; and

wherein said pearlescent appearance is caused solely by said blend of plasticized poly(vinyl butyral) and poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester.