IP Library › Granted Patent US 10,759,746
Granted Patent B2
US 10,759,746 · App. 16/496,031 · Granted Sep 1, 2020

Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid

Inventors: Cédrick Favero (Andrezieux Boutheon, FR); Johann Kieffer (Andrezieux Boutheon, FR)
Assignee: S.P.C.M. SA
C07C309/15C02F1/56C02F11/147C08F20/58C09K8/588C09K8/68C09K8/80E21B43/16E21B43/26C02F2103/10C07B2200/13C09K2208/28
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Quick Facts
Patent No.
US 10,759,746
App. No.
16/496,031
Granted
Sep 1, 2020
Kind
B2
Abstract

The present invention relates to a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks 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° degrees (+/−0.1°). The present invention also relates to a production method for this form of 2-acrylamido-2-methylpropane sulfonic acid and a preparation method for an aqueous solution A of a salt of this form of 2-acrylamido-2-methylpropane sulfonic acid, and the (co)polymer of this form of -acrylamido-2-methylpropane sulfonic acid.

Claims (6)

1. A hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks 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°, and 46.04° degrees, all peak values being +/−0.1°.

2. A hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid according to claim 1 , wherein it presents a Fourier transform infrared spectrum comprising peaks at 3280 cm −1 , 3126 cm −1 , 1657 cm −1 , 1595 cm −1 , 1453 cm −1 , 1395 cm −1 , 1307 cm −1 , 1205 cm −1 , 1164 cm −1 , 1113 cm −1 , 1041 cm −1 , 968 cm −1 , 885 cm −1 , 815 cm −1 , and 794 cm −1 , all peak values being +/−8 cm −1 .

3. The hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid according to claim 1 , wherein it presents minimum ignition energy greater than 400 mJ.

4. The hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid according to claim 1 , wherein it presents 4 thermal phenomena with the Differential Scanning calorimetry technique at 70° C., 100° C., 150° C. and 190° C., all +/−10° C.

5. The hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid according to claim 1 , wherein it has a water/2-acrylamido-2-methylpropane sulfonic acid molar ratio of 1:1.

6. The hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid according to claim 3 , that presents minimum ignition energy greater than 500 mJ.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 23, 2019
From: FAVERO, CÉDRICK; KIEFFER, JOHANN
To: S.P.C.M. SA
Reel/Frame 050463/0845 →
Priority Claims (1)
FR 17 52288 · Mar 20, 2017 · national
Continuity (1)
Related Publication 20200031765A1 · Jan 30, 2020
Cited By (3)
US 12,365,754 US 12,421,330 US 12,516,235