Radio frequency heating of trans-1, 4-polybutadiene
AssigneeThe Goodyear Tire & Rubber Company
InventorsThomas Robert Maier, Bruce Raymond Hahn, Brian John Doucet
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Abstract
This invention specifically discloses a process for heating trans-1,4-polybutadiene to a temperature at which it can be processed without causing oxidative gelation which comprises heating the trans-1,4-polybutadiene by exposing it to electromagnetic radiation having a frequency in the range of about 2 MHz to about 80 MHz, wherein the trans-1,4-polybutadiene is oil-extended with at least 10 phr of a processing oil.
Claims22
A process for heating trans-1,4-polybutadiene to a temperature at which it can be processed without causing oxidative gelation which comprises heating the trans-1,4-polybutadiene by exposing it to electromagnetic radiation having a frequency in the range of about 2 MHz to about 80 MHz, wherein the trans-1,4-polybutadiene is oil-extended with at least 10 phr of a processing oil.
A technique for mixing a trans-1,4-polybutadiene with at least one rubbery polymer which comprises:
- (1) heating the trans-1,4-polybutadiene to a temperature which is within the range of 105.degree. F (41.degree. C.) to 200.degree. F. (93.degree. ) by exposing it to electromagnetic radiation having a frequency in the range of about 2 MHz to about 80 MHz, wherein the trans-1,4-polybutadiene is oil-extended with at least 10 phr of a processing oil;
- and (2) mixing the trans-1,4-polybutadiene with said rubbery polymer before any portion of the trans-1,4-polybutadiene cools to a temperature below 104.degree. F. (41.degree. C.).
A processing oil is comprised of about 30 percent to 50 percent aromatic oils, about 10 percent to 40 percent naphthenic oils and about 20 to about 50 percent paraffinic oils.
Dependencies are inferred from the claim text.