D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/16 (2006.01) D21H 17/16 (2006.01) D21H 17/17 (2006.01) D21H 17/20 (2006.01) D21H 17/23 (2006.01) D21H 17/45 (2006.01)
Patent
CA 2353400
The present invention relates to a stabilized emulsified or dispersed composition comprising a hydrophobic phase and an aqueous phase, the composition being stabilized by a cationic colloidal coacervate stabilizing agent, the coacervate stabilizing agent comprising an anionic component and a cationic component, the anionic and cationic components being present in a proportion such that the composition has a zeta potential of at least about 20 millivolts. The hydrophobic phase is preferably a non-rosin sizing agent, including a reactive or nonreactive sizing agent, although mixtures of rosin and non-rosin sizing agents can form stable emulsions or dispersions using the coacervate of the invention. Methods of making and using the stable emulsions or dispersions are also disclosed, as is sized paper made using an emulsified or dispersed sizing agent stabilized with the coacervate stabilizing agent of the invention.
La présente invention concerne une composition sous forme d'émulsion ou de dispersion stabilisée de phase hydrophobe et de phase aqueuse. Pour stabiliser cette composition on utilise un stabilisant à base de coacervat colloïdal cationique. Ce stabilisant à base de coacervat réunit un composant anionique et un composant cationique présents dans des proportions conférant à la composition un potentiel électrocinétique d'au moins 20 mV. La phase hydrophobe est de préférence un apprêt sans colophane, réactif ou non. Le coacervat de l'invention permet d'utiliser également des mélanges d'apprêts à la colophane et d'apprêts sans colophane donnant néanmoins des émulsions ou des dispersions stables. L'invention concerne également, d'une part des procédés se rapportant à la fabrication et à l'utilisation d'émulsions ou de dispersions stables, et d'autre part du papier apprêté fait en utilisant un apprêt en émulsion ou en dispersion qui ont été stabilisée au moyen du stabilisant à base de coacervat de l'invention.
Hercules Incorporated
Moffat & Co.
LandOfFree
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