C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
117/194, 400/301
C09D 5/24 (2006.01) H01B 1/24 (2006.01)
Patent
CA 1320779
TITLE CONDUCTIVE PRIMER COMPOSITION ABSTRACT A primer composition containing solvents, a film forming binder and pigments of an electrically conductive carbon black pigment and the binder contains about (1) 40-70% by weight of a polyester copolymer having linear segment with hydroxyl groups and a hydroxyl number of about 15 - 300 and a number average molecular weight of about 300 - 3,000 and branched chains having hydroxyl groups and having a hydroxyl number of about 175 - 300 and a number average molecular weight of about 500 - 2,000 and are attached to linear segment by esterification of the hydroxyl groups with a diacid or a anhydride; and (2) 30 - 60 % by weight of an alkylated melamine formaldehyde crosslinking agent; wherein the composition forms a hard flexible coating on a substrate whereby the coated substrate can be bent 180° around a 1/2 inch mandrel with the coating facing outward and the coating exhibits substantially no breaks or cracks when tested at -18°C and the coating has a surface conductivity of at least 160 Randsburg units.
559228
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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