Sizing of paper

Details Sizing of paper Sizing of paper

D - Textiles, Paper

21

H

D21H 21/16 (2006.01) C07D 207/273 (2006.01) C07D 213/22 (2006.01) C07D 401/06 (2006.01) D21H 17/07 (2006.01) D21H 17/09 (2006.01) D21H 17/16 (2006.01) D21H 17/17 (2006.01) D21H 17/24 (2006.01) D21H 17/26 (2006.01) D21H 17/42 (2006.01) D21H 17/68 (2006.01)

Patent

CA 2280137

The invention relates to an aqueous dispersion containing a cellulose-reactive sizing agent and a dispersant system comprising a low molecular weight cationic organic compound having a molecular weight less than 10,000 and an anionic stabilizer, its preparation and use in the production of paper. The invention further relates to a substantially water-free composition containing a cellulose-reactive sizing agent, a low molecular weight cationic organic compound having a molecular weight less than 10,000 and an anionic stabilizer, its preparation and use in the preparation of an aqueous dispersion of cellulose-reactive sizing agent. Suitable anionic stabilizers for use in this invention include anionic compounds, functioning as stabilizers and/or being effective in combination with the cationic compounds to stabilize the sizing agent in an aqueous phase as well as anionic compounds known as useful as dispersants in the preparation of size dispersions. Preferably the anionic compound is water-soluble or water- dispersable. The anionic stabilizer can be selected from organic or inorganic compounds and it can be derived from natural or synthetic sources.

L'invention concerne une dispersion aqueuse contenant une solution de collage qui réagit à la cellulose, un système dispersant à base de composé organique cationique de faible masse moléculaire (inférieure à 10 000) et un stabilisant anionique, ainsi que sa fabrication et son utilisation dans la production de papier. L'invention concerne également une composition sensiblement anhydre renfermant une solution de collage qui réagit à la cellulose, un composé organique cationique de faible masse moléculaire (inférieure à 10 000) et un stabilisant anionique, ainsi que sa fabrication et son utilisation dans la préparation d'une dispersion aqueuse de solution de collage réagissant à la cellulose. Aux fins de l'invention, les stabilisants anioniques appropriés s'étendent aux composés anioniques tenant lieu de stabilisants et/ou étant efficaces en combinaison avec les composés cationiques pour stabiliser la solution de collage en phase aqueuse, ainsi qu'aux composés cationiques connus comme dispersants utiles dans la préparation de dispersions de collage. Le composé anionique est de préférence hydrosoluble ou dispersable dans l'eau. On peut choisir le stabilisant anionique parmi des composés organiques ou inorganiques et le dériver de sources naturelles ou synthétiques.

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