Adhesion promoting composition and coated film
AssigneeEastman Kodak Company
InventorsJack Hayward, Michael W. Orem, Gerald G. Reafler
Life of this patent
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Abstract
A tie-coat composition for preparing paint-coated, stretchable polyester which can be bonded to automobile panels. The tie-coat contains a non-ionic, fluorinated surfactant which reduces product non-uniformities.
Claims14
In a coating composition comprising an aqueous polymeric dispersion comprising a uretahne resin derived from a multifunctional isocyanate and a polyol, the improvement wherein said composition also contains a non-ionic fluorinated surfactant of the formula:
- ##STR3## wherein R=H or lower alkyl, m=1-4,
- n=5-9,
- p=2-30,
- whereby the tendency of said coating composition to form repellencies on polyester films at low coating coverages is reduced.
A coated film comprising a stretchable carrier film formed of an immiscible blend of a polyester with another polymer having on its surface a thin, dried tie coat layer comprising a urethane resin and a non-ionic fluorinated surfactant of the formula:
- ##STR4## wherein R =H or lower alkyl, m=1-4,
- n=5-9,
- p=2-30,
- and a polyurethane paint layer, whereby said tie layer improves the adhesion of the paint layer to the carrier film.
Dependencies are inferred from the claim text.