Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1999-09-29
2000-11-14
Cameron, Erma
Coating processes
With post-treatment of coating or coating material
Heating or drying
4274121, 4274123, B05D 302
Patent
active
061467065
ABSTRACT:
A liquid coating composition has: from about 5 to 45 percent by weight of resin solids of substantially saturated polyhydroxylated polydiene polymer having terminal hydroxyl groups; from about 10 to 50 percent by weight of resin solids of crosslinking material; from about 5 to 85 percent by weight of resin solids of polymeric film forming resin; and solvent. The solvent has at least 5 percent by weight of the solvent composition consisting of water; and/or at least one organic solvent having Hansen Solubility Parameters Sp.sub.o from about 8.0 to 10.0 (cal/cm.sup.3).sup.1/2, Sp.sub.h from about 0.5 to 5.0 (cal/cm.sup.3).sup.1/2 ; and Sp.sub.p from about 0.2 to 3.0 (cal/cm.sup.3).sup.1/2 ; and/or mixtures thereof. The liquid coating composition can be solvent-based or aqueous-based and can additionally contain at least one pigment. The liquid coating composition can be coated directly onto thermoplastic and thermosetting plastic substrates, such as TPO and RIM, without the aid of flame or corona pretreatment, or the use of an adhesion promoter. A method of coating plastic substrates comprising the use of the liquid coating composition and a plastic article coated with the liquid coating composition are also disclosed.
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Humphrey William A.
Meyers Lawrence D.
Verardi Christopher A.
Cameron Erma
Cannoni Ann M.
PPG Industries Ohio Inc.
Stachel Kenneth J.
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