Method of making polyester film with a reduced iridescent primer layer

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United States of America Patent

PATENT NO 9937525
SERIAL NO

14795276

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Abstract

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This invention relates to a highly optically clear, composite film having a predominantly thermoplastic polyester base layer and a primer layer of a polyester and polyurethane blend composition. The base layer preferably has an A/B/C layered structure with a substantially particle-free core layer B of polyester and outer layers A and C of polyester containing nonpolyester, organic and/or inorganic particles. The primer layer is preferably applied to the base layer from solution that is organic solvent-free and is crosslinked using a carbodiimide crosslinking agent. The primer layer and base layer composite can be laminated with a protective layer of primarily acrylic polymer for a solar control film. Various layers of the composite and solar control films can contain effective amounts of functional additives, such as UV light blockers. Polyurethane in the primer, especially in combination with crosslinking by the carbodiimide, provides the acrylic coated polyester base solar control film with notably reduced iridescence and durable adhesion between polyester and acrylic layers in moist and warm service conditions.

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Patent Owner(s)

Patent OwnerAddress
TORAY PLASTICS (AMERICA) INC50 BELVER AVENUE NORTH KINGSTOWN RI 02852-7520

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fitch, John Middletown, US 23 119
Paolilli, Tracy East Greenwich, US 14 39

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