C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/18 (2006.01) C08J 3/05 (2006.01) C08J 9/12 (2006.01) C08L 27/08 (2006.01) D21H 17/05 (2006.01) D21H 17/33 (2006.01)
Patent
CA 2591873
The invention concerns an aqueous slurry comprising a thickener and thermally expandable microspheres comprising a thermoplastic polymer shell and a propellant entrapped therein, said slurry having a pH of at least about 2.5 and comprising a buffer having a pKa within about ~ 1 pH-unit of the actual pH. The invention further concerns a process for its preparations, use thereof for the production of paper or non-woven, and a process for the production of paper or non-woven
La présente invention concerne une boue aqueuse comprenant un agent épaississant et des microsphères thermo-expansibles, comprenant une enveloppe en polymère thermoplastique qui renferme un gaz propulseur. Ladite boue a un pH d'au moins environ 2,5 et comprend un tampon dont le pKa est égal au pH réel ± 1 unité de pH. L'invention concerne en outre un procédé de préparation de ladite boue, son emploi dans la production de papier ou d'intissé, ainsi qu'un procédé de production de papier ou d~intissé.
Bergenudd Helena
Nordin Jan
Stenberg Eva
Akzo Nobel N.v.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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