Cellulose resin composition

Patent metadata

Field	Value
Publication number	US-9334392-B2
Application number	US-201314399663-A
Country	US
Kind code	B2
Filing date	May 7, 2013
Priority date	May 9, 2012
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

Provided is a cellulose resin composition wherein roll contamination during processing and reduction in the productivity caused by roll contamination are inhibited. The cellulose resin composition is obtained by adding a polyester-based plasticizer to a cellulose resin, the cellulose resin composition being characterized in that the polyester-based plasticizer is produced from a polybasic acid, a polyhydric acid and, as required, a stopper, in which polyester-based plasticizer, components having a molecular weight of 430 or less are removed to an amount of 5 wt % or less.

First claim

The invention claimed is:

1. A cellulose resin composition obtained by adding a polyester-based plasticizer to a cellulose resin, said cellulose resin composition being characterized in that said polyester-based plasticizer is produced from a polybasic acid, a polyhydric alcohol and, as required, a stopper,
in which polyester-based plasticizer, components having a molecular weight of 430 or less are in an amount of 0.7 wt % or less.

2. The cellulose resin composition according to claim 1 , wherein said polybasic acid comprises at least one selected from the group consisting of terephthalic acid, succinic acid and adipic acid.

3. The cellulose resin composition according to claim 1 , wherein said polyhydric alcohol comprises at least ethylene glycol or propylene glycol.

4. The cellulose resin composition according to claim 1 , wherein said polyester-based plasticizer is one in which components having a molecular weight of 430 or less are removed to an amount of 0.7 wt % or less by thin-film distillation.

5. The cellulose resin composition according to claim 1 , comprising said polyester-based plasticizer in an amount of 3 to 50 parts by mass with respect to 100 parts by mass of said cellulose resin.

6. The cellulose resin composition according to claim 1 , wherein said cellulose resin is cellulose triacetate.

7. A method of producing a polyester-based plasticizer for a cellulose resin composition, said method being characterized by comprising the steps of:
performing a dehydration-condensation reaction using a polybasic acid, a polyhydric alcohol and, as required, a stopper; and
subsequently removing components having a molecular weight of 430 or less to an amount of 0.7 wt % or less by thin-film distillation.

8. A liquid crystal display member, comprising the cellulose resin composition of claim 1 .

9. A plate, comprising the cellulose resin composition of claim 1 , selected from the group consisting of polarizing plates, phase-contrast plates and reflective plates.

10. A film, comprising the cellulose resin composition of claim 1 , selected from the group consisting of protective films of polarizing plates, viewing angle-improving films, antiglare films, nonreflective films and antistatic films.

Assignees

• Adeka Corp

Inventors

• Harada Masashi
• Yamazaki Yuji
• Kamimura Satoshi
• Tanaka Yuki

Classifications

• C08L1/08 Primary

  Cellulose derivatives · CPC title

• C08L67/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title

• C08J2301/12

  Cellulose acetate · CPC title

• C08L1/10 Primary

  Esters of organic acids {, i.e. acylates} · CPC title

• C08G63/78

  Preparation processes · CPC title