CELLULOSE DERIVATIVE, CELLULOSE RESIN COMPOSITION, MOLDED BODY AND PRODUCT USING SAME

• US 20190330379A1
• Filed: 06/15/2017
• Published: 10/31/2019
• Est. Priority Date: 06/17/2016
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: TOYAMA, Kiyohiko, IJI, Masatoshi, SHIMURA, Midori, TANAKA, Shukichi
• Granted Patent: US 11,028,186 B2
• Time in Patent Office: Days
• CPC Class Codes: C08B 3/16 Preparation of mixed organic cellulose esters , e.g. cellulose aceto-formate or cellulose aceto-propionate
• CPC Class Codes: C08K 2201/003 Additives being defined by their diameter
• CPC Class Codes: C08K 2201/005 Additives being defined by their particle size in general
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08L 1/14 Mixed esters, e.g. cellulose acetate-butyrate

Abstract

A cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, a long-chain organic group having 7 or more carbon atoms and a high refractive-index organic group.

Claims

1. A cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, a long-chain organic group having 7 or more carbon atoms and a high refractive-index organic group.

2. The cellulose derivative according to claim 1, wherein the high refractive-index organic group has an aromatic ring.

3. The cellulose derivative according to claim 1, wherein the high refractive-index organic group is an aromatic acyl group or an aromatic phosphoric acid ester group.

4. The cellulose derivative according to claim 1, wherein the acyl group is an acetyl group or/and a propionyl group.

5. The cellulose derivative according to claim 1, wherein the long-chain organic group is a linear saturated aliphatic acyl group having 14 to 30 carbon atoms.

6. A cellulose resin composition comprising the cellulose derivative according to claim 1 and a colorant.

7. The cellulose resin composition according to claim 6, wherein the colorant is a carbon black.

8. The cellulose resin composition according to claim 7, wherein the carbon black is an acidic carbon black having a pH value of 5 or less.

9. The cellulose resin composition according to claim 7, wherein an average particle diameter of the carbon black falls within a range of 1 to 20 nm.

10. The cellulose resin composition according to claim 6, wherein a content of the colorant relative to the total of the cellulose resin composition falls within a range of 0.05 to 10% by mass.

11. The cellulose resin composition according to any one of claim 6, optionally comprising a high refractive-index organic material, wherein a content of the high refractive-index organic material relative to 100 parts by mass of the cellulose derivative is 0 to 100 parts by mass.

12. The cellulose resin composition according to claim 6, wherein a total content of the cellulose derivative and the high refractive-index organic material relative to the amount of the cellulose resin composition excluding the colorant is 90% by mass or more.

13. A molded body formed of the cellulose resin composition according to claim 6.

14. A product using the molded body according to claim 13.