Antistatic agent, antistatic agent composition, antistatic resin composition, and molded article

Patent metadata

Field	Value
Publication number	US-10227447-B2
Application number	US-201515511799-A
Country	US
Kind code	B2
Filing date	Aug 5, 2015
Priority date	Sep 17, 2014
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

Provided are: an antistatic agent and an antistatic agent composition which are capable of providing excellent antistatic effect in a small amount and have sufficient persistence and wiping resistance without impairing the intrinsic physical properties of a resin; and an antistatic resin composition and a molded article using the same.
The antistatic agent includes a polymer compound (E) having a structure in which a diol, an aliphatic dicarboxylic acid, an aromatic dicarboxylic acid, a compound (B) which comprises at least one group represented by the following Formula (1) and has hydroxyl groups at both ends, and a polyhydric alcohol (D) having three or more hydroxyl groups are bound via ester bonds:

—CH 2 —CH 2 —O—  (1).

First claim

The invention claimed is:

1. An antistatic agent comprising a polymer compound (E) having a structure in which a diol, an aliphatic dicarboxylic acid, an aromatic dicarboxylic acid, a compound (B) which comprises at least one group represented by the following Formula (1) and has hydroxyl groups at both ends, and a polyhydric alcohol compound (D) having three or more hydroxyl groups are bound via ester bonds:
—CH 2 —CH 2 —O—  (1),

wherein said polymer compound (E) has a structure in which a polyester (A), which is constituted by a diol, an aliphatic dicarboxylic acid and an aromatic dicarboxylic acid, said compound (B) and said polyhydric alcohol compound (D) are bound via ester bonds, and
wherein said polymer compound (E) has a structure in which a block polymer (C) having carboxyl groups at both ends and said polyhydric alcohol compound (D) are bound via an ester bond, said block polymer (C) comprising a block constituted by said polyester (A) and a block constituted by said compound (B) that are repeatedly and alternately bound via ester bonds.

2. The antistatic agent according to claim 1 , wherein said polyester (A) has a structure comprising carboxyl groups at both ends.

3. The antistatic agent according to claim 2 , wherein said block constituted by said polyester (A) has a number-average molecular weight of 800 to 8,000 in terms of polystyrene, said block constituted by said compound (B) has a number-average molecular weight of 400 to 6,000 in terms of polystyrene, and said block polymer (C) has a number-average molecular weight of 5,000 to 25,000 in terms of polystyrene.

4. The antistatic agent according to claim 1 , wherein said compound (B) is a polyethylene glycol.

5. An antistatic agent composition comprising at least one selected from the group consisting of alkali metal salts and Group II element salts in the antistatic agent according to claim 1 .

6. An antistatic resin composition comprising the antistatic agent according to claim 1 in a thermoplastic resin.

7. The antistatic resin composition according to claim 6 , wherein said thermoplastic resin is at least one selected from the group consisting of polyolefin-based resins, polystyrene-based resins and copolymers thereof.

8. The antistatic resin composition according to claim 6 , wherein the mass ratio of said thermoplastic resin and said antistatic agent is in a range of 99/1 to 40/60.

9. The antistatic resin composition according to claim 6 , wherein the mass ratio of said thermoplastic resin and said antistatic agent composition is in a range of 99/1 to 40/60.

10. A molded article composed of the antistatic resin composition according to claim 6 .

11. An antistatic resin composition comprising the antistatic agent composition according to claim 5 in a thermoplastic resin.

12. The antistatic resin composition according to claim 11 , wherein said thermoplastic resin is at least one selected from the group consisting of polyolefin-based resins, polystyrene-based resins and copolymers thereof.

13. The antistatic resin composition according to claim 11 , wherein the mass ratio of said thermoplastic resin and said antistatic agent is in a range of 99/1 to 40/60.

14. The antistatic resin composition according to claim 11 , wherein the mass ratio of said thermoplastic resin and said antistatic agent composition is in a range of 99/1 to 40/60.

15. A molded article composed of the antistatic resin composition according to claim 11 .

Assignees

• Adeka Corp

Inventors

• Nakamura Tatsuhito
• Nomura Kazukiyo

Classifications

• C08L67/00

  Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers · CPC title

• C08G63/672 Primary

  Dicarboxylic acids and dihydroxy compounds · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C08G63/668

  derived from polycarboxylic acids and polyhydroxy compounds · CPC title

• C08L23/14

  Copolymers of propene (C08L23/16 takes precedence) · CPC title