CARBOXY METHYLCELLULOSE OR SALT THEREOF AND COMPOSITION THEREOF

• Main Authors: DOI KUNIAKI, ONO SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 18.02.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a carboxy methylcellulose or a salt thereof capable of being efficiently dissolved in water even with gentle agitation (excellent in rapidly dissolving property).SOLUTION: In a cumulative volume-based particle size distribution, a form of carboxy methylcellulose or a salt thereof is adjusted such that D10 is 90 μm or more and D50 is 120 to 470 μm, and D90 is 500 μm or less, when a particle size of 10% cumulative, 50% cumulative, and 90% cumulative are assumed to be D10, D50, and D90, respectively, from the small particle size side. The D10 may be about 100 μm or more, the D50 may be about 150 μm to about 200 μm, and the D90 may be about 250 μm or less. In a granular carboxy methylcellulose or a salt thereof, a ratio of particles having a roundness of 50% or more may be about 90 vol.% or more based on the whole particles, and a ratio of particles having a roundness of 70% or more may be about 70 vol.% or more based on the whole particles.SELECTED DRAWING: None 【課題】緩やかな攪拌であっても、水に効率よく溶解可能な（即溶性に優れた）カルボキシメチルセルロースまたはその塩を提供する。【解決手段】カルボキシメチルセルロースまたはその塩を、粒径の体積基準の累積分布において、小粒径側から累積１０％、累積５０％および累積９０％の粒径をそれぞれＤ１０、Ｄ５０およびＤ９０としたとき、Ｄ１０が９０μｍ以上、Ｄ５０が１２０〜４７０μｍ、Ｄ９０が５００μｍ以下である形態に調整する。前記Ｄ１０は１００μｍ程度以上であってもよく、Ｄ５０が１５０〜２００μｍ程度であってもよく、Ｄ９０は２５０μｍ程度以下であってもよい。粒状のカルボキシメチルセルロースまたはその塩において、真円度５０％以上の粒子の割合は、全体に対して９０体積％程度以上であってもよく、真円度７０％以上の粒子の割合は、全体に対して７０体積％程度以上であってもよい。【選択図】なし