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1. IN7599/DELNP/2007 - REDUCED SHEAR CELLULOSE REACTIVE SIZING AGENT FOR WET END APPLICATIONS

Office India
Application Number 7599/DELNP/2007
Application Date 03.10.2007
Publication Number 7599/DELNP/2007
Publication Date 11.07.2008
Publication Kind A
IPC
D21H 17/16
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
17Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
03Non-macromolecular organic compounds
05containing elements other than carbon and hydrogen only
14Carboxylic acids; Derivatives thereof
15Polycarboxylic acids, e.g. maleic acid
16Addition products thereof with hydrocarbons
Applicants KEMIRA OYJ
Inventors PAWLOWSKA, LUCYNA
DILTS, KIMBERLY, C.
LONG, THOMAS,T.
HUNTER, CHARLES,R.
PROVERB, ROBERT,J.
Priority Data 60/658,359 03.03.2005 US
Title
(EN) REDUCED SHEAR CELLULOSE REACTIVE SIZING AGENT FOR WET END APPLICATIONS
Abstract
(EN)
The invention relates to a method for sizing a paper product that involves the steps of (a) providing a paper stock system; (b) forming, in the absence of high shearing forces, an aqueous sizing emulsion comprising an alkenylsuccinic anhydride component; (c) submitting the emulsion formed from step b to a post-dilution step in the presence of a cationic component under conditions, in the absence of high shearing forces, that produce a post-diluted emulsion having improved sizing efficacy; (d) adding the post-diluted emulsion to the paper stock; and (e) forming a paper web.

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