MAGNESIUM CARBONATE

• US 20200131329A1
• Filed: 04/25/2018
• Published: 04/30/2020
• Est. Priority Date: 04/28/2017
• Status: Active Grant

• Current Assignee: Konoshima Chemical Co., Ltd.
• Original Assignee: Konoshima Chemical Co., Ltd.
• Inventors: NAKAMURA, Masashi
• Granted Patent: US 11,319,426 B2
• Time in Patent Office: Days
• CPC Class Codes: C01F 5/24 Magnesium carbonates
• CPC Class Codes: C01P 2004/20 extending in two dimensions, e.g. plate-like
• CPC Class Codes: C01P 2004/32 Spheres
• CPC Class Codes: C01P 2004/45 Aggregated particles or particles with an intergrown morphology
• CPC Class Codes: C01P 2004/50 Agglomerated particles
• CPC Class Codes: C01P 2004/51 Particles with a specific particle size distribution
• CPC Class Codes: C01P 2004/61 Micrometer sized, i.e. from 1-100 micrometer
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/16 Pore diameter
• CPC Class Codes: C01P 2006/40 Electric properties
• CPC Class Codes: C01P 2006/62 L* (lightness axis)
• CPC Class Codes: C01P 2006/80 Compositional purity
• CPC Class Codes: C01P 2006/90 Other properties not specified above
• CPC Class Codes: C08F 14/06 Vinyl chloride
• CPC Class Codes: C08K 2003/267 Magnesium carbonate
• CPC Class Codes: C08K 2201/005 Additives being defined by their particle size in general
• CPC Class Codes: C08K 2201/006 Additives being defined by their surface area
• CPC Class Codes: C08K 3/26 Carbonates; Bicarbonates
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C09C 1/028 Compounds containing only magnesium as metal

Abstract

Provided is a novel magnesium carbonate. The magnesium carbonate has a zeta potential of 5 mV or more and a BET specific surface area of 25 m²/g or more. Such a magnesium carbonate can be used as a resin additive, etc.

Claims

1. A magnesium carbonate having a zeta potential of 5 mV or more and a BET specific surface area of 25 m²/g or more.

2. The magnesium carbonate according to claim 1, wherein the zeta potential is 6 to 25 mV and the BET specific surface area is 28 m²/g or more.

3. The magnesium carbonate according to claim 1, which has a mercury intrusion volume of 1 to 8 cc/g.

4. The magnesium carbonate according to claim 1, which has an average particle size of 1 to 20 μ

m.

5. The magnesium carbonate according to claim 1, wherein the zeta potential is 7 to 20 mV, the BET specific surface area is 30 to 70 m²/g, the mercury intrusion volume is 1.5 to 5 cc/g, and the average particle size is 2 to 15 μ

m.

6. The magnesium carbonate according to claim 1, which is in the form of aggregates with a card-house structure.

7. The magnesium carbonate according to claim 1, which is a resin additive.

8. A composition comprising a resin and the magnesium carbonate according to claim 1.

9. The composition according to claim 8, wherein the resin comprises a vinyl chloride resin.

10. The composition according to claim 8, wherein the resin comprises a rubber.

11. The composition according to claim 8, wherein the proportion of the magnesium carbonate is 0.1 part by mass or more based on 100 parts by mass of the resin.