C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 43/11 (2006.01) C07C 43/178 (2006.01) C07C 69/24 (2006.01) C08G 65/28 (2006.01) D21C 5/02 (2006.01)
Patent
CA 2129223
A deinking agent comprising a compound represented by the following general formula I is herein provided: R1O -(PO)m -(EO)n - (XO)k - R2 (I) (wherein R1 represents an alkyl or alkenyl group having 12 to 22 carbon atoms; R2 represents a hydrogen atom or an acyl group having 2 to 24 carbon atoms; PO, EO and XO represent a propylene oxide unit, an ethylene oxide unit and an alkylene oxide unit having not less than 3 cabon atoms, respectively; m = 1~8; n = ~40; and k is such a number that the number of total carbon atoms present in the polymerized XO unit ranges from 3 to 120; the PO and EO in Formula (I) being added through block-addition) ~ The use of the deinking agent in the deinking methods, in particular, the flotation method permits the preparation of high quality reclaimed pulp having high brightness and a low content of residual ink and also ensures stable operations for the methods.
Hagiwara Masaaki
Hirakouchi Yoshie
Lion Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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