The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1993
Filed:
Jun. 12, 1991
Sri R Seshadri, Newtown, PA (US);
Henkel Corporation, Ambler, PA (US);
Abstract
The invention relates to a surface treatment composition and a method of using the composition to provide the treated surface with a suitable surface conductivity for electrostatic painting of the surface. The surface treatment composition preferably comprises a mixture of: (a) a substituted or unsubstituted aromatic polycarboxylic acid, anhydride or salt thereof, and (b) a quaternary ammonium salt or (b') an ethoxylated tertiary fatty amine, in a compatible vehicle, said composition having a pH of below about 4.5, said polycarboxylic acid and said quaternary ammonium salt or ethoxylated fatty amine each being present in said composition in an amount effective to impart to said thermoplastic surface a resistivity value of between about 10.sup.8 ohms/cm.sup.2 and about 10.sup.12 ohms/cm.sup.2, or a 90% electrostatic charge decay time of less than five seconds, or both.