Production of polymethylenamine, e.g. cationic fixative, dehydrating agent, flocculant or retention aid for paper industry, involves free radical polymerization of imidazol(in)e or 1,3,2-diazasilacyclo-pent(adi)ene and optional hydrolysis

    公开(公告)号:DE10305807A1

    公开(公告)日:2004-08-26

    申请号:DE10305807

    申请日:2003-02-12

    Abstract: Production of polymethylenamine (I) uses an educt comprising an optionally substituted imidazol(in)e or 1,3,2-diazasilacyclo-pentene or -pentadiene compound (II); and involves free radical polymerization of (II), using a free radical initiator with a half life of 5-30 minutes at the selected reaction temperature and hydrolysis of the resultant polymer if necessary. Production of polymethylenamine (I) uses an educt comprising an optionally substituted imidazol(in)e or 1,3,2-diazasilacyclo-pentene or -pentadiene compound of formula (II); and involves free radical polymerization of (II), using a free radical initiator with a half life of 5-30 minutes at the selected reaction temperature and hydrolysis of the resultant polymer if necessary: [Image] Q : C or Si, with the broken line indicating an optional double bond; R1>, R2>H, R, formyl; (un)saturated, linear or branched, optionally aryl-substituted aliphatic 1-40 C acyl, R', R5>OCO(O), -C(O)NR6>R7> or -C(O)XR8>; R : (un)saturated, linear or branched, optionally aryl-substituted 1-40 C alkyl or optionally alkyl-substituted 5-6 C aryl; R' : optionally alkyl-substituted aromatic 5-6 C acyl; R5>R; R6>, R7>H, R or R'; X : O or S; R8>H or R; R3>, R4>H, R, OR or OH or together =O or =S. An independent claim is also included for process for hydrolysis of poly(1,3-diacyl-4-imidazolidin-2-(thi)one using strong alkali(ne earth) metal base in combination of compounds or ions that break hydrogen bridges, preferably lithium (Li+>), magnesium (Mg2>+>), urea, substituted urea or urea derivatives.

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