Back to results
US 6,646,054 B1Granted
Adhesion between rubber components
AssigneeThe Goodyear Tire & Rubber Company
InventorsBruce Raymond Hahn, Adel Farhan Halasa, Wen-Liang Hsu
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeThe Goodyear Tire & Rubber Company
InventorsBruce Raymond Hahn, Adel Farhan Halasa, Wen-Liang Hsu
Estimating the term…
The process of this invention can be utilized to improve the adhesion between rubber components. It is generally most useful for improving the adhesion between two different pre-cured rubber components or for improving the adhesion between a pre-cured rubber component and an uncured (green) rubber component. However, the technique of this invention can also be employed to improve the adhesion between two uncured rubber components. The technique of this invention is based upon the unexpected discovery that low molecular weight trans-1,4-polybutadiene containing rubber compounds can be used to improve the adhesion between rubber components. This invention more specifically reveals a technique for improving the adhesion between a first rubber component and a second rubber component in a process for manufacturing a cured rubber article, said technique comprising the steps of: (1) positioning a layer of an adhesion-promoting rubber composition which is comprised of a low molecular weight trans-1,4-polybutadiene rubber between the first rubber component and the second rubber component, (2) bringing the first rubber component into contact with one side of the layer of adhesion-promoting rubber composition and bringing the second rubber composition into contact with the other side of the layer of adhesion-promoting rubber composition and (3) curing the first rubber composition, the second rubber composition and the adhesion-promoting rubber composition together under conditions of heat and pressure to produce the cured rubber article.
An adhesion-promoting rubber composition which is comprised of (a) from about 10 weight percent to about 40 weight percent trans-1,4-polybutadiene, wherein said trans-1,4-polybutadiene has a number average molecular weight which is within the range of 50,000 to 120,000 and wherein said trans-1,4-polybutadiene has a trans-microstructure content which is within the range of about 60 percent to about 90 percent and (b) from about 60 weight percent to about 90 weight percent of at least one rubbery polymer.
Dependencies are inferred from the claim text.