Alkaline earth metal carbonate exhibiting a resistance to acids expressed as pH of less than 7 measured after suspending 1.0 g of the particles in a mixture made of 20 ml of toluene and 80 ml of an aqueous phase consisting of deionized water, 11.76 g/L of citric acid monohydrate, 2.57 g/L of NaCl and 0.068 mol/L of NaOH, after 35 minutes of stirring at 25°C and at 1 000 rpm,, or expressed as a moisture pick-up lower than or equal to 2 g water/kg of calcium carbonate after one week of storage at 22°C and 50 % relative humidity, or as a Different ial Scanning Calorimetry (DSC) spectrum showing at least one peak between 170 and 190°C when measured at a heating rate of 10°C/min under nitrogen atmosphere from 25 to 250°C in open cells. Process for the preparation of said particles, compositions containing said particles and the use thereof.
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机译：在将1.0 g颗粒悬浮在由20 ml甲苯和80 ml去离子水组成的混合物（11.76 g / L的水）制成的混合物中后，测得的碱土金属碳酸盐对酸的抗性表示为小于7的pH值。一水柠檬酸，2.57 g / L NaCl和0.068 mol / L NaOH，在25°C和1000 rpm下搅拌35分钟后，或表示为水分吸收量低于或等于2 g水/ kg的碳酸钙在22°C和50％相对湿度下储存一周后，或以差示扫描量热法（DSC）光谱显示，以10的加热速率测量时，在170至190°C之间显示至少一个峰在开孔中，在25至250°C的氮气氛下以°C / min的速度运行。所述颗粒的制备方法，包含所述颗粒的组合物及其用途。
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