D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/10 (2006.01) C08G 73/02 (2006.01) D21H 17/52 (2006.01) D21H 17/54 (2006.01) D21H 17/55 (2006.01)
Patent
CA 2146922
OLIGOAMIDE-EPICHLOROHYDRIN RESINS AS DRAINAGE AIDS ABSTRACT OF THE DISCLOSURE A water-soluble drainage-aid composition which is the reaction product of a bifunctional crosslinking agent which may be an epihalohydrin selected from the group consisting of epichlorohydrin or epibromohydrin, a 1,3-dihalo-2-propanol in which "halo" is chloro- or bromo-, or a glycidyl ester of an alkanesulfonic or arenesulfonic acid, and an oligoamide reaction product of a polyalkylene polyamine with a carboxylic acid selected from the group consisting of dicarboxylic acids containing between 5 and 10 carbons and their acyl halides, amides, and esters of alcohols having up to 6 carbon atoms, and tricarboxylic acids containing between6 and 10 carbon atoms and their acyl halides, amides, and esters of alcohols having up to 6 carbon atoms, with a mole ratio of polyamine to dicarboxylic acidor its functional derivative between 1.5/1 and 2/1 or a mole ratio of polyamine to tricarboxylic acid or its functional derivative of 3/1, the oligoamide reaction product being an amine-terminated oligo(aminoamide) having an average composition of at least two amide groups and at least four amine groups per molecule, the bifunctional crosslinking agent being used a level of between 1.5 and 2.5 moles per mole of oligoamide; a method for making the water-soluble drainage-aid composition, and a method for using the water-soluble drainage-aid composition - a dewatering aid in paper manufacture.
Dasgupta Sunil P.
Espy Herbert H.
Hercules Incorporated
Moffat & Co.
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