| 摘要 |
<p>The invention relates to particles having a core comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions. The particles have a coating containing a silicate, and a water soluble magnesium salt, and the core and/or the coating contains an aliphatic organic compound or a salt thereof as a chelating agent, wherein the chelating agent is an alkali metal salt or alkaline earth metal salt 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, wherein the chelating agent in the coating constitutes from about 0.1 to about 15 percent by weight of the particle. The invention also relates to preparation and use of the particles as well as a composition containing such particles.</p> |
