| 摘要 |
FIELD: polymer production. ^ SUBSTANCE: ,2-dihydro-2,2,4-trimethylquinoline polymer, useful as stabilizer against thermooxidative, atmospheric, and ozone-caused aging of rubbers, is obtained by condensation of aniline with 2.5-5.5 molar equivalents of acetone in an anhydrous medium in presence of hydrogen chloride catalyst under following conditions: pressure, temperature 85-105, content of chloride ion 1.5-2.3%, reaction time 5-12 h. After distilling away excess acetone, condensation product is polymerized for 4-12 h in presence of hydrogen chloride at 80-95 and content of chloride ion in reaction mixture 7.5-11%. Polymer is recovered by neutralizing reaction mixture, extraction with nonpolar solvent, and separation polymer and monomer fraction from solvent. ^ EFFECT: lowered temperature conditions of process. ^ 1 tbl, 24 ex |
