ANTISTATIC AGENT, ANTISTATIC AGENT COMPOSITION, ANTISTATIC RESIN COMPOSITION, AND MOLDED BODY

• US 20150353796A1
• Filed: 01/22/2014
• Published: 12/10/2015
• Est. Priority Date: 01/23/2013
• Status: Active Grant

• Current Assignee: Adeka Corporation
• Original Assignee: Adeka Corporation
• Inventors: NOMURA, Kazukiyo, NAKAMURA, Tatsuhito
• Granted Patent: US 10,100,239 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C08G 63/91 Polymers modified by chemical after-treatment
• CPC Class Codes: C08G 81/00 Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers involving only carbon-to-carbon unsaturated bond reactions C08F299/00 ; polyester-amides C08G69/44; polyester-imides C08G73/16; polyamides-imides C08G73/14; block- or graft polymers containing polysiloxane sequences C08G77/42
• CPC Class Codes: C08L 87/005 Block or graft polymers not provided for in groups C08L1/00 - C08L85/04
• CPC Class Codes: C09K 3/16 Anti-static materials

Abstract

Provided are: an antistatic agent which is capable of imparting excellent antistatic effect in a small amount and has sufficient persistence and wiping resistance; an antistatic agent composition; an antistatic resin composition; and a molded article. The antistatic agent comprises a polymer compound (E) having a structure in which a block polymer (C) and an epoxy compound (D) are bound via an ester bond formed by a carboxyl group of the block polymer (C) and an epoxy group of the epoxy compound (D), the block polymer (C) having a structure comprising carboxyl groups at both ends, in which structure a block constituted by a polyester (A) having carboxyl groups at both ends and a block constituted by a compound (B) having hydroxyl groups at both ends are repeatedly and alternately bound via ester bonds formed by the carboxyl groups and the hydroxyl groups, and the epoxy compound (D) comprising two or more epoxy groups.

Claims

1. An antistatic agent, comprising a polymer compound (E) having a structure in which a block polymer (C) and an epoxy compound (D) are bound via an ester bond formed by a carboxyl group of said block polymer (C) and an epoxy group of said epoxy compound (D),

said block polymer (C) having a structure comprising carboxyl groups at both ends, in which structure a block constituted by a polyester (A) having carboxyl groups at both ends and a block constituted by a compound (B) having hydroxyl groups at both ends are repeatedly and alternately bound via ester bonds formed by the carboxyl group and the hydroxyl group, and

said epoxy compound (D) comprising two or more epoxy groups.

2. The antistatic agent according to claim 1, wherein said polymer compound (E) further comprises an ester bond formed by a carboxyl group of said polyester (A) having carboxyl groups at both ends and an epoxy group of said epoxy compound (D).

3. The antistatic agent according to claim 1, wherein

said polyester (A) has a structure in which a residue obtained by removing a carboxyl group from an aliphatic dicarboxylic acid and a residue obtained by removing a hydroxyl group from a diol are repeatedly and alternately bound via ester bonds, and

said compound (B) having hydroxyl groups at both ends comprises at least one group represented by the following Formula (1).

—

CH₂—

CH₂—

O—

 

 

(1)

4. The antistatic agent according to claim 3, wherein said compound (B) having hydroxyl groups at both ends is a polyethylene glycol.

5. The antistatic agent according to claim 1, 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) having hydroxyl groups at both ends 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.

6. An antistatic agent composition, characterized by 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.

7. An antistatic resin composition, comprising the antistatic agent according to claim 1.

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

9. The antistatic resin composition according to claim 7, wherein the mass ratio of said thermoplastic resin and said antistatic agent is in a range of 99/1 to 40/60.

10. The antistatic resin composition according to claim 7, wherein the mass ratio of said thermoplastic resin and said antistatic agent composition is in a range of 99/1 to 40/60.

11. A molded article, characterized by being composed of the antistatic resin composition according to claim 7.

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