C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 3/39 (2006.01) C01B 15/00 (2006.01) C01B 15/10 (2006.01) C07C 409/00 (2006.01) C11D 3/08 (2006.01) C11D 3/20 (2006.01) C11D 17/00 (2006.01)
Patent
CA 2183749
The invention relates to particles having a core comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions, which particles have a coating containing a chelating agent selected from alkali metal salts or alkaline earth metal salts of a hydroxy carboxylic acid satisfying the formula: RCnHm(OH)nCOOH in which R is CH2OH or COOH, n is 2-6 and m is 0-n. The invention also relates to preparation and use of the particles, as well as a composition containing such particles.
L'invention concerne des particules présentant un noyau comprenant un composé peroxy libérant du peroxyde d'hydrogène ou des acides peroxy dans des solutions aqueuses. Ces particules présentent un enrobage comprenant un agent de chélation choisi parmi des sels de métal alcalin ou des sels de métal alcalino-terreux d'un acide hydroxycarboxylique représenté par la formule RC¿n?H¿m?(OH)¿n?COOH, dans laquelle R correspond à CH¿2?OH ou COOH, n vaut 2 à 6 et m 0 à n. L'invention porte également sur la préparation et l'utilisation desdites particules ainsi que sur une composition contenant ces dernières.
Jigstam Monica
Lagnemo Hans
Degussa Ag
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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