Rubber articles subjected to repeated deformation and compositions for making the same

Patent metadata

Field	Value
Publication number	US-9382963-B2
Application number	US-201514633681-A
Country	US
Kind code	B2
Filing date	Feb 27, 2015
Priority date	Aug 14, 2008
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

An air spring having an airsleeve, wherein at least one layer of said airsleeve includes the vulcanization product of an elastomer and syndiotactic 1,2-polybutadiene.

First claim

What is claimed is:

1. An air spring having an airsleeve, where at least one layer of said airsleeve includes a vulcanization product of a vulcanizable composition comprising:
an elastomer, where said elastomer includes polychloroprene or a polychloroprene copolymer; and
from about 10 to about 30 parts by weight syndiotactic 1,2-polybutadiene, per 100 parts by weight of total rubber, where said syndiotactic 1,2-polybutadiene has a melt temperature of from about 70° C. to about 95° C.

2. The air spring of claim 1 , where said polychloroprene copolymer is a copolymer of chloroprene and 2,3-dichloro-1,3-butadiene.

3. The air spring of claim 2 , where said copolymer has a Mooney Viscosity (ML 1+4 at 100° C.) of 100-120.

4. The air spring of claim 2 , where said polychloroprene copolymer comprises a copolymer of chloroprene and 2,3-dichloro-1,3-butadiene having a Mooney Viscosity (ML 1+4 at 100° C.) of 41-51.

5. The air spring of claim 1 , where said syndiotactic 1,2-polybutadiene is characterized by a 1,2-linkage content of at least 70%, and less than 90%.

6. The air spring of claim 1 , where said syndiotactic 1,2-polybutadiene is characterized by syndiotacticity of at least 60%, and less than 90%.

7. An air spring having an airsleeve, where at least one layer of said airsleeve includes a vulcanization product of a vulcanizable composition comprising:
an elastomer, where said elastomer includes polychloroprene or a polychloroprene copolymer; and
from about 10 to about 30 parts by weight syndiotactic 1,2-polybutadiene, per 100 parts by weight of total rubber, the syndiotactic 1,2-polybutadiene having a melt temperature of about 95° C.

8. The air spring of claim 7 , where said polychloroprene copolymer is a copolymer of chloroprene and 2,3-dichloro-1,3-butadiene.

9. The air spring of claim 7 , where said elastomer includes a first copolymer of chloroprene and 2,3-dichloro-1,3-butadiene having a Mooney Viscosity (ML 1+4 at 100° C.) of 100-120.

10. The air spring of claim 9 , where said elastomer further includes a second copolymer of chloroprene and 2,3-dichloro-1,3-butadiene having a Mooney Viscosity (ML 1+4 at 100° C.) of 41-51.

11. The air spring of claim 7 , where said syndiotactic 1,2-polybutadiene is characterized by a 1,2-linkage content of at least 70%, and less than 90%.

12. The air spring of claim 7 , where said syndiotactic 1,2-polybutadiene is characterized by syndiotacticity of at least 60%, and less than 90%.

13. A method for production of an air spring airsleeve comprising:
mixing an elastomer, syndiotactic 1,2-polybutadiene, and a curative in a masterbatch to form a rubber composition, wherein said elastomer includes polychloroprene or a polychloroprene copolymer;
forming the rubber composition into an airsleeve; and
curing the rubber composition, where said syndiotactic 1,2-polybutadiene has a melt temperature of from about 70° C. to about 95° C., and where said rubber composition includes from about 10 to about 30 parts by weight syndiotactic 1,2-polybutadiene, per 100 parts by weight of total rubber.

Assignees

• Firestone Ind Products Co Llc

Inventors

• Agarwal Sheel
• Luo Steven
• Rensel John

Classifications

• B60G11/27

  wherein the fluid is a gas · CPC title

• B32B2307/704

  Crystalline · CPC title

• B32B2307/102

  Insulating · CPC title

• C08L91/02

  Vulcanised oils, e.g. factice · CPC title

• B32B2264/102

  Oxide or hydroxide · CPC title