Preparation of water-soluble condensates and their use as...

Details Preparation of water-soluble condensates and their use as... Preparation of water-soluble condensates and their use as...

C - Chemistry, Metallurgy

08

G

402/274, 260/607

C08G 59/50 (2006.01) C08G 69/48 (2006.01) C08G 73/02 (2006.01) D21H 17/54 (2006.01) D21H 21/10 (2006.01)

Patent

CA 1150262

Abstract of the Disclosure: A process for the prepara- tion of water-soluble polymeric crosslinking agents by a two-stage reaction of di-secondary diamines with epi- chlorohydrin and/or dichlorohydrin, wherein, in the first stage, di-secondary diamines are condensed with epichlorohydrin and/or dichlorohydrin in a molar ratio of from 1:0.5 to 1:1 at a pH of from 9 to 12, and in the second stage the condensates obtained in the first stage are reacted with additional epichlorohydrin and/or di- chlorohydrin at a pH of from 4 to 8.5. The water- soluble condensates thus obtained are crosslinking agents for polyamines, polyamidoamines, ethyleneimine-modified polyamidoamines and polyether-amines. The cross- linking reaction gives water-soluble condensates, which possess a high cation activity and may be used as reten- tion aids, drainage aids and flocculants in the manu- facture of paper.

369239

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