TT-P-2760A

Abstract

This specification covers the requirements for two types (see <a>1.2.1</a>) and two classes (see <a>1.2.2</a>) of low volatile organic compound (VOC) content (see <a>3.4.2</a>), solvent-borne, elastomeric, polyurethane primer coatings. These primer coatings are formulated primarily for spray application, are compatible with polyurethane topcoats, and are intended for use on aircraft and other equipment subjected to structural flexing at low temperatures. The maximum volatile organic compound (VOC) content of the admixed primer coatings is 340 grams per liter (g/l) or 2.8 pounds per gallon (lbs/gal). Unless a specific type and/or class is referenced in the contract or purchase order, TT-P-2760A, Type I, Class C is the default. Class N may not be substituted for Class C, unless authorization for its use is given by the procuring activity or engineering authority for the system or item to which the primer coating is to be applied. See <a>6.13</a> for the cross-reference of classes to previous revisions of this specification. <b><u>Intended Use:</u></b> The primer coatings covered by this specification are low VOC, corrosion-inhibitive, flexible primer coatings intended for use on the exterior surfaces of aircraft and other equipment that are subjected to structural flexing at low temperatures. Type I is for general use. Type II is for use where low infrared reflectance is required. Unless a specific type and/or class is referenced in a contract or purchase order, Type I, Class C is the default reference. The non-chromated (Class N) primer coatings are for use where federal, state, or local regulations restrict the use of chromate based materials. Class N primer coatings may only be used when authorization for its use is given by the procuring activity or the engineering authority for the system or item to which the primer coating is to be applied. For users of TT-P-2760, Class 2, "High-Solids," use Class C of this document. <br>