POLYMER INTERLAYERS COMPRISING BLENDS OF PLASTICIZED POLY(VINYL BUTYRAL) AND POLY(CYCLOHEXANEDIMETHYLENE TEREPHTHALATE-CO-ETHYLENE TEREPHTHALATE) COPOLYESTER
First Claim
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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) copolyester and 95 to 5 weight percent of said plasticized poly(vinyl butyral).
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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.
67 Citations
14 Claims
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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) copolyester and 95 to 5 weight percent of said plasticized poly(vinyl butyral). - View Dependent Claims (3, 4, 5, 6)
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2. (canceled)
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7. A laminated glass panel comprising:
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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). - View Dependent Claims (9, 10, 11, 12, 13)
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8. (canceled)
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14. A method of making a polymer sheet, comprising:
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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 of said plasticized poly(vinyl butyral).
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Specification