Laminates comprising plasticized polyvinyl butyral interlayers

Details Laminates comprising plasticized polyvinyl butyral interlayers Laminates comprising plasticized polyvinyl butyral interlayers

B - Operations, Transporting

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B32B 27/30 (2006.01) B32B 17/10 (2006.01) B32B 17/12 (2006.01) B32B 27/08 (2006.01) B32B 27/22 (2006.01)

Patent

CA 1245966

06-12-(1090)A LAMINATES COMPRISING PLASTICIZED POLYVINYL BUTYRAL INTERLAYERS ABSTRACT In a polyvinyl butyral (PVB) sheet plasti- cized with a multiester of an alcohol having 2 to 4 hydroxyl groups and a C16 to C20 unsaturated fatty acid having a hydroxyl group attached to the acid molecule, which sheet does not craze polycarbonate or polyacrylate when in contact therewith, the addition of a synergistically effective amount of a monoester of a glycol and such C16 to C20 acid improves the low temperature penetration resistance and adhesion properties of such sheet without significant loss in its resistance to stress cracking polycarbonate or polyacrylate in a laminated glass assembly. In a further embodiment very low temperature impact delamination of laminates containing adjacent layers of polycarbonate or polyacrylate and polyvinyl butyral is overcome by a flexible, hydrophobic, adhesive coating of polyvinylidene chloride or urethane acrylate resin at the interface between the poly- carbonate or polyacrylate and the polyvinyl butyral.

460731

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