METHOD FOR PRODUCTION OF 1,2-DIHYDRO-2,2,4-TRIMETHYLQUINOLINE POLYMER Russian patent published in 2005 - IPC

Abstract RU 2245346 C1

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^оС, 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^оС 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

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RU 2 245 346 C1

Authors

Selivanov N.V.

Maslov N.S.

Zharikov L.K.

Tikhonova G.G.

Dates

2005-01-27—Published

2003-08-18—Filed