260. ------. BRUBAKER, M. M. (E. I. du Pont de Nemours & Co.). Interpolymers of Carbon Monoxide. United States Patent 2,495,286, Jan. 24, 1950. Chem. Abs., vol. 44, 1950, p. 4285.

Patent Abstracts

Copolymers of CO with unsaturated organic compounds are prepared using peroxide catalysts and re useful as protective coatings, fibers, plasticizers, and adhesives. Thus, 125 parts H₂O and 0.5 part Bz₂O₂ under 325 atm. CO and enough C₂H₂ to give 500 atm. pressure give after 11 hr. at 115º a polymer, m. 200º-202º, containing keto groups and having 1.2:1-C₂H₂:CO ratio. It is soluble in Me₂NCHO, insoluble in toluene, MeOH, Me₂CO, and AcOH. A lower melting polymer forms if solvent is absent (73º-77º reaction temperature at 1,000 atm.). Et₂O₂ catalyst gives a polymer infusible to 250º, whose molecular ratio is 1.3: 1: use of 30:70 CO-C₂H₂ mixture in this case at 129º for 14 hr. gives an orientable polymer, m. above 250º. Mixtures of Olefins and dienes may be used, as well as unsaturated esters, such as vinyl acetate, diallyl phthalate, di-Etmaleate, C₂F₄, and vinyl chloride. Various organic peroxides are the preferred catalysts.