ARCTIC RUBBER.

• Main Authors: Brown,H.A., Knoll,N., Rice,D.E.
• Other Authors: MINNESOTA MINING AND MFG CO ST PAUL
• Format: Text
• Language: English
• Published: 1962
• Subjects: STABILITY; SYNTHESIS(CHEMISTRY); SYNTHETIC RUBBER; VULCANIZATION; COPOLYMERIZATION; PYROLYSIS; POLYMERS; CHROMATOGRAPHY; ELASTOMERS; AGING(MATERIALS); TEMPERATURE; Arctic
• Online Access: http://www.dtic.mil/docs/citations/AD0418638; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0418638

A new method of preparing nitrosyl trifluoroace tate (and other nitrosyl perfluoroacylates) via the reaction (CF3CO)2O N2O3 yields 2 CF3COONO was discovered. By this reaction, nitrosyl tri fluoroacetate can be conveniently prepared in high yield. Subsequent decarboxylation of this mate rial by photolytic or pyrolytic methods gives tri fluoronitrosomethane in about 50% overall yield. This route to CF3NO has significant advantages regarding cost and ease of operation over previ ously known methods. The CF3NO/C2F4 copolymer can be prepared by suspension polymerization tech niques. One of the most promising approaches to the problem of finding an adequate cure for ni troso rubber appears to be through terpolymeriza tion. Two nitrosoperfluorocarboxylic acids, beta nitrosoperfluoropropionic acid and gamma-nitroso perfluorobutyric acid, were prepared by the solid phase photolysis of dinitrosyl perfluorosuccinate and dinitrosyl perfluorogluarate respectively. The carboxy-terpolymers can be crosslinked and cured easily with polyvalent metal salts. (Author)