| 摘要 |
1,172,815. N-vinyl lactam monomers. GAF CORP. 14 Nov., 1966 [19 Nov., 1965], No. 50963/66. Heading C2C. [Also in Divisions C3 and C5] N-vinyl lactams having from 4 to 6 carbon atoms inclusive in the ring and having an alkyl or halogen substituted alkyl group containing 6-42 carbon atoms in the 3-position are prepared by (i) reacting a lactone of the formula wherein R and R<SP>1</SP> are hydrogen, ethyl or methyl and m is 1, 2 or 3 with a C 6-42 α-olefin in the presence of a tertiary-alkyl organic peroxide as catalyst to form the corresponding 3-alkyl lactone which is then ammoniated to form the corresponding lactam, and (ii) reacting the lactam thus obtained with 0À04 moles of potassium tertiary butoxide (per mole of lactam) in the presence of a liquid aromatic hydrocarbon as inert solvent to a temperature of 145-155‹ C. under a nitrogen pressure of 70 p.s.i.g. to yield the potassium salt, reacting said potassium salt with acetylene under a pressure of 200 p.s.i.g. for six hours, increasing the temperature to 160‹ C. and containing the reaction until about 1 mole. of acetylene has reacted, and cooling and recovering the N-vinyl- 3-alkyl lactam. The lactams may subsequently be homopolymerized or copolymerized with other vinyl monomers (see Division C3). Specific examples describe the production of N-vinyl-3- octyl pyrrolidone, N-vinyl-3-hexyl pyrrolidone, N-vinyl-3-dodecyl piperidone, N-vinyl-3-decyl caprolactam and N-vinyl-3-hexadecyl pyrrolidone and the corresponding intermediate compounds. |
