Optimization of Coatings for the M205 Non Metallic Cartridge Case for All-Temperature Use.
Abstract
The purpose of this study is to optimize a coating to provide enchanced protection of cartridge cases against hydraulic fluids, water vapor and liquid water. Most important, such environmental protection is to be achieved in such a manner that a coated case shall not leave residue in the gun when the cartridge cases are ballistically fired at any temperature from -40F to +125F and/or after exposure to specified adverse environmental conditions such as rain, temperature-humidity cycling and hydraulic fluids. The coatings were formulated based on microcrystalline, amorphous or low molecular weight polyolefin waxes and/or any other appropriate compounding additives and be applicable by conventional coating technology. Two systems were found to be promising for further work. One consisted of a blend of a major amount of a nonreactive Mobil 2300 type microcrystalline wax and a minor quantity of a film forming polymer such as, for example, Elvax plus, optionally a silicone treatment (silicone resin XR 63701). This system works well but requires very careful processing and needs improvement in low temperature performance. The other treatment involves two compositions which are applied consecutively i.e. (a) thin polyvinylalcohol coating followed by (b) a polyvinyledene chloride (Saran) copolymer top coating.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1974
- Accession Number
- ADA006890
Entities
People
- Edward Mcmahon
- James J. Timlin
- Pantelis Papazoglou
- Walter Brenner
Organizations
- New York University