C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 1/86 (2006.01) B08B 3/04 (2006.01) C11D 1/02 (2006.01) C11D 1/04 (2006.01) C11D 1/83 (2006.01) C11D 1/88 (2006.01) C11D 3/02 (2006.01) C11D 3/20 (2006.01) C11D 11/00 (2006.01) C11D 17/08 (2006.01)
Patent
CA 2441029
An aqueous liquid composition comprising water; at least one acid selected from the group consisting of carboxylic acids, hydroxycarboxylic acids, and inorganic acids other than phosphoric acid wherein the at least one acid is present in an amount from about 1.0 to about 30 milliequivalents per kilogram of total composition ("mEq/kg"); and an amphoteric surfactant wherein the amphoteric surfactant is present in an amount from about 0.01 to about 20 grams per kilogram of total composition ("g/kg"), the aqueous liquid composition having a pH from about 2.0 to about 6.1 and having a reduced etch attack on metal as compared to an aqueous composition comprising from about 1.0 to about 30 milliequivalents per kilogram of total composition ("mEq/kg") of acids selected from the group consisting of carboxylic, hydroxycarboxylic, and inorganic acids, and not containing the amphoteric surfactant. The invention also includes a method of cleaning plastic members using the disclosed aqueous liquid composition.
L'invention concerne une composition aqueuse liquide qui renferme de l'eau; au moins un acide pouvant appartenir aux groupes suivants: acides carboxyliques, acides hydroxycarboxyliques, et acides inorganiques autres que l'acide phosphorique, cet acide ou ces acides étant présents dans des proportions qui oscillent entre environ 1 et environ 30 milliéquivalents par kilogramme de poids total de composition ("mEq/kg"); et un tensioactif amphotère présent dans des proportions comprises entre environ 0,01 et environ 20 grammes par kilogramme de poids total de composition ("g/kg"). Ladite composition a un pH compris entre environ 2 et environ 6,1 et un potentiel d'attaque sur le métal réduit par rapport à une composition aqueuse qui renferme entre environ 1 et environ 30 milliéquivalents, par kilogramme de poids total de composition ("mEq/kg"), d'acides pouvant appartenir aux groupes suivants: acides carboxyliques, acides hydroxycarboxyliques, et acides inorganiques, sans le tensioactif amphotère. L'invention concerne enfin un procédé relatif au nettoyage d'articles en plastique, qui repose sur l'utilisation de la composition décrite.
Henkel Kommanditgesellschaft Auf Aktien
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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