The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 1995
Filed:
Jan. 14, 1994
Herbert Wagner, Bad Schonborn, DE;
Karl-Heinrich Schuhmacher, St. Leon, DE;
Rhein Chemie Rheinau GmbH, Mannheim, DE;
Abstract
An aqueous outside release agent for the production of tires and other rubber articles is described, which contains 5 to 35% by wt. diatomaceous earth, 0.5 to 6% by wt. pyrogenic hydrophobic silica, 0.1 to 2% by wt. nonionic surfactant, 0.2 to 3% by wt. of a binder, 0.1 to 3% by wt. dye, 0 to 5% by wt. ethyl alcohol and the remainder water. Preferred binders are styrene-maleic acid or styrene-maleic anhydride copolymers and in particular ammonium salts thereof. Said outside release agent is used in processes for molding and vulcanizing tires and other rubber articles, it being sprayed onto the blank with the aid of air-atomizing guns before molding and vulcanization are carried out. A very good release effect is thereby achieved without vulcanization being impaired. As only very small quantities of outside release agent are needed, cleaning of the press mold and hence interruption of the production process are required very much less frequently than when conventional outside release agents are used.