Anti-static composition and method of making the same

• US 5,525,261 A
• Filed: 10/18/1994
• Issued: 06/11/1996
• Est. Priority Date: 10/18/1994
• Status: Expired due to Fees

• Current Assignee: Cognis Corporation (BASF SE)
• Original Assignee: Henkel Corporation (Henkel AG & Co KGaA)
• Inventors: Fischer, Stephen A., Incorvia, Michael J.
• Primary Examiner(s): GREEN, ANTHONY J
• Application Number:
  US08/324,823
• Time in Patent Office: 602 Days
• Field of Search: 252/8.6, 252/8.8, 252/500, 252/8.7, 252/8.75, 57/901, 524/910, 524/911, 428/289, 428/290, 428/412, 428/474.4, 428/475.5, 428/480, 428/423.1, 428/413, 427/393.1, 427/393.5, 427/430.1, 427/434.2, 564/281
• US Class Current: 252/500
• CPC Class Codes: H05F 1/00 Preventing the formation of electrostatic charges
• CPC Class Codes: Y10S 57/901 Antistatic
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31511 Of epoxy ether
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31725 Of polyamide
• CPC Class Codes: Y10T 428/31739 Nylon type
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 442/2434 Linear polyether group chain containing

Abstract

Antistatic agents and their use in natural or synthetic textiles or formed plastic substrates to enhance the surface resistivity thereof. The antistatic agent comprises a mixture of polyoxyalkylamine derivatives comprising a fluoro-acid moiety, a fatty acid moiety and a quaternary ammonium moiety. The coatings remain effective after exposure of the treated substrate to an aqueous environment and to elevated temperatures.

Claims

1. An antistatic composition comprising a reaction product formed by reacting (1) polyoxyalkylene polyamine having at least two amine functional groups and a polyether backbone containing ethylene oxide, propylene oxide or a mixture of ethylene oxide and propylene, an aliphatic, cycloaliphatic or aromatic fluoro-acid, (3) a fatty acid having a chain length between 6 and 40 carbon atoms, and (4) a quaternizing agent selected from the group consisting of dimethyl sulfate, diethyl sulfate, methyl chloride, a quaternary ammonium alkylating agent, and mixtures thereof.

2. A composition as claimed in claim 1 wherein said polyoxyalkylene polyamine is a polyether diamine having a backbone containing predominantly ethylene oxide, said fluoro-acid is trifluoroacetic acid, said fatty acid is isostearic acid, and said quaternary ammonium alkylating agent is 2,3-epoxypropyl trimethylammonium chloride.

3. A method for dissipating an electrostatic charge on a static-prone substrate comprising contacting said substrate selected from the group consisting of a textile substrate, a formed, thermoplastic substrate and a formed, thermoset substrate with an antistatic composition as claimed in claim 1 in an amount effective to impart to said substrate a surface resistivity value less than about 10¹³ ohms, or about 90% electrostatic charge decay time of about 20 seconds or less, or both.

4. A method as claimed in claim 3, wherein said antistatic composition is applied to the surface of said substrate.

5. A method as claimed in claim 3, wherein said antistatic composition is applied to the surface of natural and synthetic substrates.

6. A method as claimed in claim 4, wherein said antistatic composition is applied to said surface by passing said substrate through a bath comprising said antistatic agent.

7. A method as claimed in claim 4, wherein said antistatic composition is applied by passing substrates selected from the group consisting of thermoplastic and thermoset substrates through a bath comprising said antistatic agent.

8. A method for dissipating an electrostatic charge on a static-prone substrate comprising blending an antistatic composition as claimed in claim 1 with a resin mass prior to forming the substrate, said substrate being selected from the group consisting of a textile substrate, a thermoplastic substrate and a thermoset substrate, said antistatic composition being present in an amount effective to impart to said substrate a surface resistivity value less than about 10¹³ ohms, or about 90% electrostatic charge decay time of about 20 seconds or less, or both.

9. A method as claimed in claim 8, wherein said substrate is a textile substrate.

10. A method as claimed in claim 8, wherein said substrate is a formed, thermoplastic substrate.

11. An article of manufacture comprising a substrate selected from the group consisting of a textile substrate, a formed, thermoplastic substrate and a formed, thermoset substrate wherein said substrate is coated with the antistatic composition of claim 1.

12. An article of manufacture comprising a substrate selected from the group consisting of a textile substrate, a formed, thermoplastic substrate and a formed, thermoset substrate wherein said substrate is coated with the antistatic composition of claim 2.

13. An anti-static composition comprising a reaction product of:

(i) a polyether polyamine of the formula ##STR2## wherein b ranges from about 8 to about 200 and a+c is about 2.5, said polyether polyamine having a molecular weight in the range of about 500 to about 10,000;

(ii) trifluoroacetic acid;

(iii) isostearic acid and (iv) 2,3 epoxypropyl trimethylammonium chloride.

14. The composition according to claim 13 prepared by reacting about one equivalent of reactive component (i) with about 0.15 equivalent of reactive component (ii) and subsequently reacting the product with 0.35 equivalent of reactive component (iii), and further reacting the product with about 0.5 equivalent of reactive component (iv) to yield said composition.

15. An article of manufacture comprising a substrate selected from the group consisting of a textile substrate, a formed, thermoplastic substrate and a formed, thermoset substrate wherein said substrate is coated with the antistatic composition of claim 13.