Accession Number : ADA309555

Title :   The Use of Poly(Metal Phosphinates) as Antistatic Coatings, Multi-Purpose Fluid Thickeners, and Thermally Stable Coatings.

Descriptive Note : Final rept. 16 Feb-15 Nov 67,

Corporate Author : PENNSALT CHEMICALS CORP KING OF PRUSSIA PA

Personal Author(s) : Dahl, G. H. ; Sprout, O. S., Jr. ; Peschko, N. D. ; Block, B. P.

PDF Url : ADA309555

Report Date : MAR 1968

Pagination or Media Count : 38

Abstract : Water-repellent and transparent plasticized poly(metal phosphinate) compositions were developed for antistatic coatings on polyethylene. Coatings based on Cr(H2O)(OH)(OPBu2O)2, Cr(H2O)(OH)OP(Me)((Ph)O2, Cr(H2O)(OH)(OPPh2O)2, and TiO(OPPh2O)2 all dissipated a 5 kV positive charge in one second or less. Coatings based on TiO(OPPh2O)2 also dissipated a 5 kV negative charge in one second or less and were essentially not tacky. The tris(phosphinate) CrOP(C8H17)2OOP(Me)(Ph)O2 prepared in situ was found to be an effective thickener for a variety of lubricant fluids in the 5-14% concentration range. A thickener with substantially greater thermal stability was prepared by the reaction of Cr(H2O)(OH) - OP(Me)(Ph)O2 with Me(Ph)P(O)OH. Greases made from DC550 and these thickeners exhibit drop points generally above 600 deg F and good antiwear properties; however, their bearing performance is limited. Coatings of CrOP(C8H17)2OOP(Me)(Ph)O2 pigmented with TiO2 adhere well to cold-rolled 1010 steel and exhibit good hardness and resistance to jet oil or water. They can tolerate 250 deg C. in air for one hour but degrade at 300 deg C. The use of more stable chromium (III) tris(phosphinates), i.e. , tris(phosphinates) containing no alkyl groups other than methyl, for coatings was briefly explored. Although the coatings based on these showed superior resistance to jet oil and water, adhesion to the 1010 steel was not satisfactory for the formulations investigated.

Descriptors :   *PROTECTIVE COATINGS, *CHROMIUM COMPOUNDS, *LUBRICATING OILS, *PHOSPHINATES, ZIRCONIUM COMPOUNDS, DEGRADATION, PERFORMANCE(ENGINEERING), HIGH TEMPERATURE, ADHESION, SYNTHESIS(CHEMISTRY), CORROSION INHIBITION, THERMAL STABILITY, METAL COATINGS, STEEL, CHEMICAL COMPOSITION, GREASES, CONCENTRATION(CHEMISTRY), WEAR RESISTANCE, COBALT, TITANIUM COMPOUNDS, MANGANESE, POLYETHYLENE, PLASTIC COATINGS, WATER REPELLENTS, PHOSPHINIC ACIDS, THERMOGRAVIMETRIC ANALYSIS, INORGANIC POLYMERS, THICKENERS(MATERIALS).

Subject Categories : Coatings, Colorants and Finishes
      Lubricants and Hydraulic Fluids
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE