Oil-containing rubber compositions and related methods
Disclosed herein are rubber compositions comprising bio-oil produced by a recombinant cell. Also disclosed are methods of controlling the variability of fatty acid content in bio-oil containing rubber compositions or tires comprising at least one component incorporating the bio-oil containing rubber composition, and a method of providing a bio-oil-containing tire with a reduced carbon footprint.
1. A bio-oil-containing tire rubber composition, comprising
1 to 50 phr of bio-oil produced by a recombinant cell wherein the bio-oil has a linoleic acid content of at least 45% by weight, an oleic acid content of at least 20% by weight, an alpha-linolenic acid content of at least 3% by weight, and a palmitic acid content of at least 5% by weight,
at least one rubber in an amount of 100 parts selected from the group consisting of polybutadiene having a cis-1,4-bond content of 90% or higher, styrene-butadiene copolymer, natural rubber, polyisoprene, and combinations thereof, wherein the at least one rubber includes a majority by weight of polybutadiene having a cis-1,4-bond content of 90% or higher,
50 to 200 phr of at least one reinforcing filler, and
a cure package, wherein the at least one reinforcing filler comprises at least one carbon black, at least one silica, or at least one carbon black and at least one silica, and when at least one carbon black is present with at least one silica, the carbon black constitutes no more than 30% by weight of the total amount of reinforcing filler.
2. The tire rubber composition of claim 1 , wherein the bio-oil is present in an amount of 10 to 30 phr.
3. The tire rubber composition of claim 1 , wherein the bio-oil is present in an amount of 5 to 40 phr.
4. The tire rubber composition of claim 1 , wherein the at least one rubber further includes styrene-butadiene copolymer.
5. The tire rubber composition of claim 1 , wherein the polybutadiene having a cis-1,4-bond content of 90% or higher is present in an amount of at least 60% by weight.
6. The tire rubber composition of claim 1 , wherein the reinforcing filler comprises 5 to 20% by weight of carbon black.
7. A tire sidewall comprising the tire rubber composition of claim 1 .
8. A tire tread comprising the tire rubber composition of claim claim 1 .
9. A bio-oil-containing tire rubber composition made by mixing ingredients comprising
about 5 to about 40 phr of bio-oil produced by a recombinant cell wherein the bio-oil has a linoleic acid content of at least 45% by weight, an oleic acid content of at least 20% by weight, an alpha-linolenic acid content of at least 3% by weight, and a palmitic acid content of at least 5% by weight,
at least one rubber in an amount of 100 parts selected from the group consisting of polybutadiene having a cis-1,4-bond content of 90% or higher, styrene-butadiene copolymer, natural rubber, polyisoprene, and combinations thereof, wherein the at least one rubber includes a majority by weight of polybutadiene having a cis-1,4-bond content of 90% or higher,
50 to 200 phr of at least one reinforcing filler, and
a cure package, wherein the at least one reinforcing filler comprises at least one carbon black, at least one silica, or at least one carbon black and at least one silica, and when at least one carbon black is present with at least one silica, the carbon black constitutes about 5 to about 10% by weight of the total amount of reinforcing filler.
10. The tire rubber composition of claim 9 , wherein the bio-oil is used in an amount of 10 to 20 phr.
11. The tire rubber composition of claim 9 , wherein the bio-oil is used in an amount of 5 to 30 phr.
12. The tire rubber composition of claim 9 , wherein the at least one rubber further includes styrene-butadiene copolymer.
13. The tire rubber composition of claim 9 , wherein the polybutadiene having a cis-1,4-bond content of 90% or higher is present in an amount of at least 60% by weight.
14. A tire tread comprising the tire rubber composition of claim claim 9 .
15. A tire sidewall comprising the tire rubber composition of claim 9 .
16. The tire rubber composition of claim 1 , wherein the at least one rubber further comprises natural rubber.
17. The tire rubber composition of claim 4 , wherein the at least one rubber further comprises natural rubber.
18. The tire rubber composition of claim 5 , wherein the at least one rubber further comprises natural rubber.
19. The tire rubber composition of claim 9 , wherein the at least one rubber further comprises natural rubber.
20. The tire rubber composition of claim 12 , wherein the at least one rubber further comprises natural rubber.