Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-03-16
1978-09-05
Anderson, Harold D.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 4575R, 260 4575C, 260 4575N, 260 4575B, 260 4575F, 260 4575G, 260 4575M, 260 4575P, 260 4575W, 260 37N, 528313, 528318, 528319, 2602593R, 2603265FL, 2603265FN, 528320, 528312, 528323, 528325, 528326, C08G 6920
Patent
active
041118693
ABSTRACT:
The invention relates to a method for the cationic polymerization of lactams either substituted or unsubstituted on the lactam ring, which contain 6-16 carbon atoms, in the presence of 0.05 - 10 mol. % based on the lactam of an anhydrous salt of Cu, Zn, B, Al, Ti, Si, V, Sb, Bi, Cr, Mo, W, Mn, Fe, Co, Ni and an inorganic or organic anion such as phosphate, pyrophosphate, phosphite, sulfate, halide, carboxylate and sulfonate in the presence of 0.05 - 5 mol. % of a protic organic or inorganic acid such as pyrophosphoric, phosphorous, hydrohalic carboxylic and sulfonic. These additives can be added to lactam below 180.degree. C and the polymerization is carried out at 150.degree. - 320.degree. C for 0.1 - 200 hr. The above-specified salts, also their mixtures, can be used. The polymerization can be carried out with mixtures containing two or more lactams. The process can be carried out in a solvent and in the presence of various anhydrous inorganic fillers, such as glass fibers, ground minerals, powdered metals, metal oxides, phosphates, sulfates or sulfides or graphite. The process can also be effectively conducted in the presence of organic dyes, plasticizers and emulsifiers. If the polymerization is performed with the salts of cations which are spontaneously reduced by the lactam during polymerization, finely dispersed metals are formed and remain suspended in the polymer.
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Puffr Rudolf
Sebenda Jan
Anderson Harold D.
Ceskoslovenska akademie ved
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