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US 4,230,771 AGranted
Polyvinyl butyral laminates with tetraethyleneglycol di-n-heptanoate plasticizer
AssigneeE. I. Du Pont de Nemours and Company
InventorThomas R. Phillips
Life of this patent
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Abstract
Laminates of glass and polyvinyl butyral plasticized with tetraethyleneglycol di-n-heptanoate.
Claims7
A laminar structure comprising at least one layer of glass and a layer of a plastic composition comprising polyvinyl butyral and, in compatible admixture therewith, a plasticizer comprising at least about 10 weight percent tetraethyleneglycol di-n-heptanoate of the formula:
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Dependencies are inferred from the claim text.