Heatable molded articles made from electrically conductive thermoplastic polyurethane

Patent metadata

Field	Value
Publication number	US-2016135253-A1
Application number	US-201414898304-A
Country	US
Kind code	A1
Filing date	Jun 11, 2014
Priority date	Jun 14, 2013
Publication date	May 12, 2016
Grant date	—

Abstract

The present invention relates to a method of using a composition (Z1) at least comprising an elastomer (E1) and an at least 90% carbon-based conductivity-conferring additive (A1) in the manufacture of an electrically heatable shaped article for the automotive sector, wherein said composition (Z1) has a Shore hardness A, determined as per DIN 53505, in the range from 30 to 95, an electric specific volume resistivity, determined as per ISO 3915, of below 1×10 2 ohm×cm and above 0.01 ohm×cm, and also a breaking extension, determined as per DIN 53504, of above 300%. The present invention further relates to a method of preparing an electrically heatable shaped article for the automotive sector comprising a composition (Z1) and also to electrically heatable shaped articles for the automotive sector comprising a composition (Z1).

First claim

1 . A method for manufacturing an electrically heatable shaped article for an automotive sector, the method comprising:
employing a composition (Z1) comprising an elastomer (E1) and at least 90% carbon-based conductivity-conferring additive (A1), wherein said at least one carbon-based conductivity-conferring additive (A1) is graphene, and said composition (Z1) has the following properties:
a Shore hardness A, determined per DIN 53505, in a range from 30 to 95,
an electric specific volume resistivity, determined per ISO 3915, of below 1×10 2 ohm×cm and above 0.01 ohm×cm, and
a breaking extension, determined per DIN 53504, of above 300%.

2 . The method according to claim 1 , wherein said elastomer (E1) is a thermoplastic polyurethane.

3 . The method of using a composition (Z1) according to claim 1 , or wherein said elastomer (E1) is a thermoplastic polyurethane based on at least one isocyanate, at least a first polyol component having a molecular weight of above 500 g/mol and at least a second polyol component having a molecular weight of below 499 g/mol.

4 - 5 . (canceled)

6 . The method according to claim 1 , wherein said at least 90% carbon-based conductivity-conferring additive (A1) is present in said composition (Z1) in an amount ranging from 0.1 to 30 wt %, based on a total weight of the composition (Z1).

7 . The method according to claim 1 , wherein said composition (Z1) has a Shore hardness A, determined per DIN 53505, in a range from 40 to 85.

8 . The method according to claim 1 , wherein said composition (Z1) has a breaking extension, determined per DIN 53504, in a range above 500%.

9 . The method according to claim 1 , wherein said composition (Z1) has an electric specific volume resistivity, determined per ISO 3915, in a range from 0.1 to 5 ohm×cm.

10 . The method according to claim 1 , wherein the electrically heatable shaped article for an automotive sector is a stripper device, a wiping blade, a sealing lip, a steering wheel, a gasket or a component part for an automotive seat or an armrest.

11 . A method of preparing an electrically heatable shaped article for an automotive sector, the method comprising
(i) providing a composition (Z1) comprising an elastomer (E1) and at least 90% carbon-based conductivity-conferring additive (A1), wherein said at least 90% carbon-based conductivity-conferring additive (A1) is graphene, and said composition (Z1) has the following properties:
a Shore hardness A, determined per DIN 53505, in a range from 30 to 95,
an electric specific volume resistivity, determined per ISO 3915, of below 1×10 2 ohm×cm and above 0.01 ohm×cm, and
a breaking extension, determined per DIN 53504, of above 300%, and
(ii) shaping said composition (Z1).

12 . An electrically heatable shaped article for an automotive sector, comprising
a composition (Z1) comprising an elastomer (E1) and at least 90% carbon-based conductivity-conferring additive (A1), wherein said at least 90% carbon-based conductivity-conferring additive (A1) is graphene, and said composition (Z1) has the following properties:
a Shore hardness A, determined per DIN 53505, in a range from 30 to 95,
an electric specific volume resistivity, determined per ISO 3915, of below 1×10 2 ohm×cm and above 0.01 ohm×cm, and
a breaking extension, determined per DIN 53504, of above 300%.

13 . The shaped article according to claim 12 , which is a stripper device, a wiping blade, a sealing lip, a steering wheel, a component part for an automotive seat or an armrest or a gasket.

14 . The shaped article according to claim 12 , which is heated by applying a direct or alternating current voltage from an automotive on-board network.

15 . The shaped article according claim 12 , wherein a temperature control of the shaped article is effected by adapting voltage or changing an input resistance.

Assignees

• Basf Se

Inventors

• Tomovic Zeljko
• Prissok Frank
• Arenz Stefan

Classifications

• C08G18/4238

  derived from dicarboxylic acids and dialcohols · CPC title

• B62D1/04

  Hand wheels · CPC title

• H05B2214/04

  Heating means manufactured by using nanotechnology · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C08K3/041

  Carbon nanotubes · CPC title