Rubber material and method for production thereof

• US 7,687,565 B2
• Filed: 11/17/2004
• Issued: 03/30/2010
• Est. Priority Date: 12/05/2003
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Geilenkirchen, Robert
• Primary Examiner(s): Choi; Ling-Siu
• Assistant Examiner(s): CHIN, HUI H
• Application Number:
  US10/581,626
• Publication Number:
  US 20070294852A1
• Time in Patent Office: 1,959 Days
• Field of Search: 524/495
• US Class Current: 524/495
• CPC Class Codes: B60S 1/38 Wiper blades provided with liquid spreading means B60S1/524; provided with gas spreading means B60S1/546
• CPC Class Codes: B60S 2001/3829 characterised by the material of the squeegee or coating thereof
• CPC Class Codes: C08K 2201/019 the composition being defined by the absence of a certain additive
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers

Abstract

A rubber material, in particular for wiper blades of windshield wipers or for automotive tires, is described, containing at least one grade of rubber, at least one filler and processing adjuvants. Of at least one of the grades of rubber present, the rubber material contains a first and a second fraction which differ in viscosity in the unvulcanized state.

Claims

1. A rubber material which contains at least one grade of rubber, at least one filler and processing aids, the filler comprising a mixture of at least two different grades of carbon black, and at least one of the grades of rubber having a first fraction and a second fraction, which in the unvulcanized state differ with respect to their viscosity, wherein the overall viscosity of the unvulcanized rubber material is in a range of 30 to 60 Mooney.

2. Rubber material according to claim 1, wherein the filler comprises a mixture of furnace carbon black and thermal carbon black.

3. Rubber material according to claim 1, wherein the rubber material contains 40-320 parts by weight of the filler with respect to 100 parts by weight of elastomer.

4. Rubber material according to claim 1, wherein a plasticizer and/or mineral oil is contained.

5. Rubber material according to claim 1, wherein the grade of rubber is EPDM, EPR, BR, SBR, IR or CR.

6. Rubber material according to claim 1, wherein the rubber material is essentially free from calcium oxide.

7. Rubber material according to claim 1, wherein the rubber material is essentially free from zinc oxide.

8. Rubber material according to claim 2, wherein the rubber material contains 40-320 parts by weight of the filler with respect to 100 parts by weight of elastomer.

9. Rubber material according to claim 8, wherein a plasticizer and/or mineral oil is contained.

10. Rubber material according to claim 9, wherein the grade of rubber is EPDM, EPR, BR, SBR, IR or CR.

11. Rubber material according to claim 10, wherein the rubber material is essentially free from calcium oxide.

12. Rubber material according to claim 11, wherein the rubber material is essentially free from zinc oxide.

13. Rubber material according to claim 12, wherein the rubber material is for wiper blades of windscreen wipers or for motor vehicle tires.

14. A wiper blade for windscreen wipers, characterized by a rubber material which contains at least one grade of rubber, at least one filler and processing aids, the filler comprising a mixture of at least two different grades of carbon black, and at least one of the grades of rubber having a first fraction and a second fraction, which in the unvulcanized state differ with respect to their viscosity, wherein the overall viscosity of the unvulcanized rubber material is in a range of 30 to 60 Mooney.

15. Wiper blade according to claim 14, wherein a head part (1) and/or a web (2) of the wiper blade is made of EPDM and/or CR, and in that a wiper lip (4) of the wiper blade is made of BR.

16. Wiper blade according to claim 14, wherein the filler comprises a mixture of furnace carbon black and thermal carbon black.

17. Wiper blade according to claim 14, wherein the rubber material contains 40-320 parts by weight of the filler with respect to 100 parts by weight of elastomer.

18. Wiper blade according to claim 14, wherein a plasticizer and/or mineral oil is contained.

19. Wiper blade according to claim 14, wherein the grade of rubber is EPDM, EPR, BR, SBR, IR or CR.

20. Wiper blade according to claim 14, wherein the rubber material is essentially free from calcium oxide.

21. Wiper blade according to claim 14, wherein the rubber material is essentially free from zinc oxide.