| abstract |
The present invention relates to a crystalline form hydrated with 2-acrylamido-2-methylpropane sulphonic acid having an x-ray diffraction pattern on powder comprising spikes at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, 46.04° 2-theta degrees (+/- 0.1°). The present invention further relates to a method for manufacturing this form of 2-acrylamido-2-methylpropane sulphonic acid, as well as to a method for preparing an aqueous solution A of a salt of this form of 2-acrylamido-2-methylpropane sulphonic acid and the (co)polymer of this form of 2-acrylamido-2-methylpropane sulphonic acid. |