Rubber surface treatment and products derived therefrom
AssigneeThe Goodyear Tire & Rubber Company
InventorsJames R. McCandless, Bharat K. Kansupada
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Abstract
The treatment of an uncured or partially cured rubber surface with a solvent mixture of a blend of n-heptane and iso-heptane. The treatment is to remove surface bloom and/or freshen the surface and to maintain or increase building tack. Cured adhesion can also be enhanced or maintained. An appropriate solvent mixture is provided. An article can be produced thereby as a cured assembly of rubber components. In one aspect, a purpose is to provide a suitable solvent mixture treatment of an uncured or partially cured rubber surface with a solvent mixture which has an acceptably minimal aromatic content, suitable drying time on the rubber surface and an acceptable odor in the workplace.
Claims14
A method of treating a rubber surface which comprises treating at least one surface of an uncured or partially cured rubber article with a hydrocarbon solvent mixture and drying said treated surface wherein said solvent mixture has an aromatic hydrocarbon content, if any, of less than one (1) weight percent, including a benzene content, if any, of less than 0.01 weight percent, and is comprised of, based on 100 parts by weight, (A) about 10 to about 35 parts by weight of n-heptane, and (B) about 65 to about 85 parts by weight of iso-heptane, wherein said solvent mixture is characterized by having a KB value in a range of about 27 to about to about 31 and the solvent mixture has an initial boiling point of a minimum of at least about 85.degree. C. and a maximum dry point of less than about 106.degree. C.
Dependencies are inferred from the claim text.