- HYDRATED CRYSTALLINE FORM OF 2-ACRYLAMIDO-2-METHYLPROPANE SULFONIC ACID
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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.
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Paragraph 0241-0245
(2020/02/15)
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- Ink composition for inkjet printing, ink set, and image forming method
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The invention provides an ink composition for inkjet printing, the ink composition containing water, a coloring material, a polymerizable compound, a polymerization initiator represented by the following Formula (X), and polymer particles having a glass transition temperature of 90°C or higher, a mass ratio of the polymer particles to the polymerization initiator represented by Formula (X) being in a range of from 1:10 to 10:1 1 [in Formula (X), each of RX1, RX2, RX3, and RX4 independently represents a hydrogen atom or a substituent; and n represents an integer from 1 to 4].
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- Process for preparing amidoalkanesulfonic acids
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Disclosed is a novel process for preparing amidoalkanesulfonic acids of the general formula STR1 or derivatives thereof by reacting a nitrile compound (1) with a β-hydroxyalkanesulfonic acid or a derivative thereof (2) in concentrated sulfuric acid. Among the compounds of the general formula (3) and derivatives thereof, unsaturated amido- and phenyl-substituted alkanesulfonic acids and derivatives thereof (in particular, 2-acrylamido-2-phenylpropane-sulfonic acid and derivatives thereof) represented by the general formula STR2 can be copolymerized with other monomers and the like to provide useful materials such as copolymer-coated solid materials, copolymer emulsions, pigment dispersants and the like.
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