Coating processes – Direct application of electrical – magnetic – wave – or... – Electrostatic charge – field – or force utilized
Patent
1993-06-23
1995-06-20
Owens, Terry J.
Coating processes
Direct application of electrical, magnetic, wave, or...
Electrostatic charge, field, or force utilized
4274123, 427485, 252511, 252512, 524439, 524507, B05D 104, B05D 138, H01H 122, H01H 124
Patent
active
054259690
ABSTRACT:
A method for coating an article made of polypropylene with an electrically conductive primer and thereafter electrostatically applying an organic solvent-type overcoat composition to the primer. The electrically conductive primer contains (A) a urethane-modified chlorinated polypropylene which is a mixture or addition reaction product of a chlorinated polypropylene and a polyurethane resin, the chlorinated polypropylene being prepared by chlorinating a homopolymer of propylene or a copolymer of propylene and another olefin monomer, (B) a melamine resin, (C) a polyester resin and (D) an electrically conductive substance such as carbon black, graphite, silver, nickel or copper. The electrically conductive primer has a surface resistivity of up to 1.times.10.sup.8 ohms after the application of the overcoat composition.
REFERENCES:
patent: 3868338 (1975-02-01), Parsons, III et al.
patent: 4740426 (1988-04-01), Tremper, III
patent: 4954573 (1990-09-01), Fry et al.
patent: 5030681 (1991-07-01), Asato et al.
patent: 5206073 (1993-04-01), Suzuki
Miyazaki Shizuo
Tanaka Toru
Tsuge Akihiro
Wakabayashi Jun
Yamashita Jun-ichi
Kansai Paint Company Limited
Owens Terry J.
Toyota Jidosha & Kabushiki Kaisha
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