C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/00 (2006.01) B05D 5/00 (2006.01) B08B 17/00 (2006.01) C09D 101/28 (2006.01) C09D 105/00 (2006.01) C09D 105/14 (2006.01)
Patent
CA 2186171
A protective polysaccharide film containing a buffering agent in an amount which is effective for substantially resisting pH changes due to environmental influence; a solution for the application onto a surface to be protected, comprising: a) a polysaccharide dissolved in an aqueous solvent therefore: and b) a buffering agent, said solution being capable of forming a film on said surface which on swelling or dissolution maintains a substantially constant pH due to environmental influence; and a process for protecting a surface from non-desired contamination and to facilitate the removal of such contamination from said surface, comprising the steps: a) applying a solution according to any of claims 7 to 12 on said surface before being subjected to contamination; b) allowing the applied solution to dry with the formation of a solid film on said surface, said film being capable of substantially resisting pH changes due to environmental influence; c) treating said film with a liquid capable of redissolving the film or providing swelling thereof; and d) removing the undesired contamination by completely or partially removing said film from the surface.
Film de protection en polysaccharide renfermant un agent tampon en une quantité suffisante pour résister de manière efficace à des variations de pH inhérentes aux facteurs environnementaux; solution destinée à être appliquée sur une surface devant être protégée, renfermant: a) un polysaccharide dissous dans un solvant aqueux; et b) un agent tampon, ladite solution pouvant former sur la surface un film qui, lors du gonflage ou de la dissolution, conserve un pH essentiellement constant sous l'effet des facteurs environnementaux; et procédé permettant de protéger une surface contre des souillures et facilitant l'enlèvement de telles souillures de cette surface, le procédé comprenant les étapes suivantes: a) application d'une solution conforme à l'une quelconque des revendications 7 à 12 sur la surface risquant d'être soumise à des souillures; b) séchage de la solution, s'accompagnant de la formation d'un film solide sur cette surface, ce film pouvant essentiellement résister aux variations de pH inhérentes aux facteurs environmentaux; c) traitement du film à l'aide d'un liquide permettant de le dissoudre ou de provoquer son gonflement; et d) enlèvement des souillures par enlèvement total ou partiel du film de la surface.
Polysaccharide Industries Ab Psi
Sim & Mcburney
LandOfFree
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