Conductive thermoplastic polyurethane

• US 10,692,624 B2
• Filed: 10/14/2014
• Issued: 06/23/2020
• Est. Priority Date: 10/15/2013
• Status: Active Grant

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: Schaefer, Frank, Minder, Ernst, Kempfert, Dirk, Bahr, Christoph, Hinrichs, Cornelia, Oltmanns, Anja
• Primary Examiner(s): Hammer, Katie L.
• Application Number:
  US15/029,967
• Publication Number:
  US 20160260516A1
• Time in Patent Office: 2,079 Days
• Field of Search: None
• CPC Class Codes: C08G 18/2027 having two nitrogen atoms in the ring
• CPC Class Codes: C08G 18/3206 aliphatic
• CPC Class Codes: C08G 18/4808 Mixtures of two or more polyetherdiols
• CPC Class Codes: C08G 18/4837 and other oxyalkylene units
• CPC Class Codes: C08G 18/4845 containing oxypropylene or higher oxyalkylene end groups
• CPC Class Codes: C08G 18/4854 Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
• CPC Class Codes: C08G 18/6674 with compounds of group C08G18/3203
• CPC Class Codes: C08G 18/73 acyclic
• CPC Class Codes: C08K 2201/017 Additives being an antistatic agent
• CPC Class Codes: C08K 3/16 Halogen-containing compounds
• CPC Class Codes: C08K 5/005 Stabilisers against oxidation, heat, light, ozone
• CPC Class Codes: C08K 5/0075 Antistatics
• CPC Class Codes: C08K 5/3445 Five-membered rings
• CPC Class Codes: C08K 5/41 Compounds containing sulfur bound to oxygen
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 25/06 Polystyrene
• CPC Class Codes: C08L 27/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 59/02 Polyacetals containing polyoxymethylene sequences only
• CPC Class Codes: C08L 61/02 Condensation polymers of aldehydes or ketones only
• CPC Class Codes: C08L 75/04 : Polyurethanes
• CPC Class Codes: C08L 75/08 : from polyethers
• CPC Class Codes: H01B 1/122 : Ionic conductors
• CPC Class Codes: H01B 1/20 : Conductive material dispersed in non-conductive organic material organic macromolecular compounds or compositions C08

Abstract

The invention relates to a composition comprising a thermoplastic polyurethane, where the thermoplastic polyurethane has been prepared from a) a diisocyanate, b) a polyol comprising a polyol A and a polyol B and c) a chain extender, optionally with the aid of catalysts and optionally further comprising additives and/or auxiliaries, and a salt and/or an ionic liquid, preferably an ionic liquid, is comprised in the composition and the polyol A comprises ethoxy and propoxy groups and the polyol B comprises butoxy groups.

Claims

1. A composition comprising:

a thermoplastic polyurethane; and

a salt and/or an ionic liquid;

wherein

the composition is a solid material, and

the thermoplastic polyurethane comprises as copolymerized components;

an aliphatic and/or cycloaliphatic diisocyanate,

a mixture of a polyol A which comprises ethoxy and propoxy groups, and

a polyol B which is a polytetramethylene glycol, and

an alkanediol chain extender.

2. The composition according to claim 1, wherein a molar % of the ethoxy and propoxy groups in the polyol A is at least 5 mol % of the total of polyol A and a molar % of polytetramethylene glycol groups in the polyol B is at least 5 mol %, based on the total of polyol B.

3. The composition according to claim 1, wherein a proportion of the ethoxy groups in the polyol A is at least 25 mol %, based on the total of polyol A.

4. The composition according to claim 1, wherein the polyol B is a homopolymer.

5. The composition according to claim 1, wherein the polyol A is a block copolymer having a block and two ends, and the block comprises ethoxy and propoxy groups and the two ends of the block copolymer consist of ethoxy groups.

6. The composition according to claim 5, wherein a proportion of the ethoxy groups in the two ends of the block copolymer is more than 5 mol %, based on the total block copolymer.

7. The composition according to claim 1, wherein an amount of the salt or the ionic liquid is from 0.1% by weight to 25% by weight, based on the weight of the thermoplastic polyurethane.

8. The composition according to claim 1, wherein the chain extender is 1,3-propanediol and 1,4-butanediol, or 1,3-propanediol and 1,6-hexanediol, or 1,4-butanediol and 1,6-hexanediol, or 1,6-hexanediol.

9. The composition according to claim 1, wherein the diisocyanate is an aliphatic diisocyanate.

10. A mixture comprising a polymer and a composition according to claim 1.

11. The mixture according to claim 10, wherein the polymer is at least one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyoxymethylene, ethylene-vinyl acetate, acrylonitrile-butadiene-styrene, polyvinyl chloride, and a thermoplastic polyurethane different from that of the composition.

12. The mixture according to claim 10, wherein a proportion by weight of the composition in the mixture is from greater than 1% by weight to less than 50% by weight.

13. A method to reduce static charging of a polymer, comprising:

increasing the conductivity of the polymer by mixing the composition according to claim 1 with the polymer.

14. A process for producing the composition according to claim 1, comprising:

preparing the thermoplastic polyurethane, and

mixing the thermoplastic polyurethane with a salt and/or an ionic liquid.

15. A process for producing the mixture according to claim 10, comprising:

preparing the thermoplastic polyurethane;

mixing the thermoplastic polyurethane with a salt and/or an ionic liquid; and

mixing the thermoplastic polyurethane, salt and/or ionic liquid mixture with a polymer.

16. A thermoplastic polyurethane, comprising as copolymerized components:

an aliphatic and/or cycloaliphatic diisocyanate,

a mixture of a polyol A which comprises ethoxy and propoxy groups, and

a polyol B which comprises polytetramethylene glycol groups, and

an alkanediol chain extender.