Search

A state-of-the-art summary has been prepared on the subject of airfield marking paints. Information is presented on the composition of such paints, federal specifications, available test methods, reflectorization methods, deterioration mechanism, skid-resistance relationships, surface preparation, application requirements, and alternative marking systems. Information on traffic paints was used where it was relevant. A summary of recommended airfield marking practices was prepared to provide practical information to people responsible for airfield marking. While currently used airfield marking practices are considered adequate, improved materials and/or methods may significantly reduce maintenance costs and may be necessary for more restrictive regulations that are anticipated. (Author)

A state-of-the-art summary has been prepared on the subject of airfield marking paints. Information is presented on the composition of such paints, federal specifications, available test methods, reflectorization methods, deterioration mechanisms, skid-resistance relationships, surface preparations, application requirements, and alternative marking systems. Information on traffic paints was used where it was relevant. A summary of recommended airfield marking practices was prepared to provide practical information to people responsible for airfield marking. (Author)

Field tests were conducted at Port Hueneme, California, and Panama City, Florida, on an adhesive developed at CEL that is capable of being applied underwater. The tests indicate that sandblasting rusty steel results in bonding as strong or stronger than wire-brushed surfaces and in stronger bonding than on waterblasted surfaces. Bonding strengths of field-applied specimens were about one-sixth to one-third those of laboratory-applied specimens., Supplement to report dated Dec 74, AD-A004 938.

A series of alkyd resins were prepared that had tin chemically bonded to them. These resins had more resistance to fungal growth than did the original alkyd resins from which they were prepared. This resistance does not appear to be lost as readily by leaching with rain as that of a resin to which bis(tri-n-butyltin) oxide is added as a preservative.

Several underwater-applied epoxy coatings were developed for protecting steel structures in seawater. The more promising formulations were laboratory and field tested at different times using a brush, a roller, and a curved plastic applicator developed by the Navy Coastal Systems Laboratory. The coating that was the easiest to apply underwater is now marketed by a commercial supplier. Sandblasting was found to be the best method of preparing steel surfaces for painting underwater, and waterblasting was the next best of the five methods tested. (Author)

The reaction products of fatty acids and bis(tributyl tin) oxide are combined with an unreacted alkyd resin, or an alkyd resin, which has been reacted with an organotin compound, in concentrations to form homogeneous blends that will air cure and are capable of being pigmented to form durable paint films having relatively large tin contents and great resistance to microbial growth. Author), Supersedes PAT-APPL-661 472-76, AD-D002 463.

This patent application concerns a two component epoxy paint for application to an underwater surface. The paint displaces the water on the underwater surface and bonds tightly and permanently to it, sealing concrete surfaces and protecting steel surfaces from corrosion. One component consists of a viscous liquid epoxy, a corrosion inhibitive pigment, and surface active agents while the other component is an amine adduct curing agent.