Bearing material

Patent metadata

Field	Value
Publication number	US-9796942-B2
Application number	US-201514872820-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Oct 2, 2014
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A plastic bearing material of a bearing may include a block copolymer. The block copolymer may include structural blocks of two or more different polymers. A first polymer may include at least one of polyamide-imide and polybenzimidazole. A second polymer may include at least one of polydimethylsiloxane, methyl vinyl ether and polyisobutene. A method for manufacturing a plastic bearing material may include synthesizing a structural block of a first polymer and a structural block of a second polymer to define a block copolymer via a condensation reaction.

First claim

The invention claimed is:

1. A plastics bearing material, comprising:
a block copolymer including structural blocks of two or more different polymers;
wherein the structural block of a first polymer includes at least one of polyamide-imide and polybenzimidazole.

2. A plastics bearing material according to claim 1 , wherein the first polymer is polyamide-imide.

3. A plastics bearing material according to claim 1 , wherein the first polymer is polybenzimidazole.

4. A plastics bearing material according to claim 1 , wherein the structural block of a second polymer includes a polymer having a lower hardness than the first polymer.

5. A plastics bearing material according to claim 1 , wherein the structural block of a second polymer includes at least one of polydimethylsiloxane, methyl vinyl ether and polyisobutene.

6. A plastics bearing material according to claim 4 , wherein the block copolymer contains more than one of 5 wt %, 10 wt % and 15 wt % of the second polymer.

7. A plastics bearing material according to claim 4 , wherein the block copolymer contains less than one of 50 wt %, 40 wt % and 30 wt % of the second polymer.

8. A plastics bearing material according to claim 4 , wherein the structural block of the second polymer has a molecular weight greater than one of 500Da, 1000Da, 1500Da, 2000Da, and 2500Da.

9. A plastics bearing material according to claim 4 , wherein the structural block of the second polymer has a molecular weight less than one of 1500Da, 2000Da, 2500Da, 3000Da, 3500Da and 4000Da.

10. A plastics bearing material according to claim 4 , wherein the structural block of the second polymer has an average molecular weight greater than one of 500Da, 1000Da, 1500Da, 2000Da and 2500Da.

11. A plastics bearing material according to claim 4 , wherein the structural block of the second polymer has an average molecular weight less than one of 1500Da, 2000Da, 2500Da, 3000Da, 3500Da and 4000Da.

12. A plastics bearing material according to claim 1 , wherein the block copolymer includes structural blocks wherein the block copolymer includes structural of two or more different copolymers that each form a domain within the bearing material.

13. A plastics bearing material according to claim 1 , wherein the block copolymer includes a matrix and at least one material is distributed throughout the matrix selected from a metal powder, a fluoropolymer, a silane and a solid lubricant.

14. A plastics bearing material according to claim 13 , wherein the metal powder includes aluminium in the form of flakes.

15. A bearing comprising: a plastics bearing material including a block copolymer, the block copolymer including a first structural block of a first polymer and a second structural block of a second polymer;
wherein the first polymer includes at least one of polyamide-imide and polybenzimidazole, and the second polymer includes a polymer having a lower hardness than the first polymer.

16. A method for manufacturing a plastics bearing material, comprising:
providing a first structural block of a first polymer, the first polymer including at least one of polyamide-imide and polybenzimidazole;
providing a second structural block of a second polymer, the second polymer including a polymer having a lower hardness than the first polymer; and
synthesising the first structural block with the second structural block to define a block copolymer via a condensation reaction.

17. A method according to claim 16 , wherein the second polymer includes at least one of polydimethylsiloxane, methyl vinyl ether and polyisobutene.

18. A bearing according to claim 15 , wherein the second polymer includes at least one of polydimethylsiloxane, methyl vinyl ether and polyisobutene.

19. A bearing according to claim 15 , wherein block copolymer includes between 10 wt % to 50 wt % of the second copolymer.

20. A plastics bearing material comprising:
a block copolymer including structural blocks of two or more different polymers;
wherein the structural block of one of the two or more different polymers includes at least one of polydimethylsiloxane, methyl vinyl ether and polyisobutene.

Assignees

• Mahle Int Gmbh
• Mahle Engine Systems Uk Ltd

Inventors

• Latham David

Classifications

• C08G73/14 Primary

  Polyamide-imides · CPC title

• C08G73/106

  containing silicon · CPC title

• C08G77/26

  nitrogen-containing groups · CPC title

• F16C2208/42

  Polyamideimide [PAI] (F16C2208/58 takes precedence) · CPC title

• F16C33/206

  with three layers · CPC title