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:
Sep. 17, 1991
Filed:
Jul. 01, 1988
Richard T Hood, Murrysville, PA (US);
Robert M Lamars, Pittsburgh, PA (US);
Indspec Chemical Corporation, Pittsburgh, PA (US);
Abstract
A rubber compounding resin which is low fuming, nonhygroscopic and low in free resorcinol. It is made by first reacting resorcinol or other phenolic compound and styrene or other vinyl compound in a molar ratio of 1.0 mole of resorcinol to 0.25 to 1.0 mole of styrene after which formaldehyde or other aldehyde is added in the amount of 0.5 to 0.7 moles. Alternatively, the resorcinol can first be reacted with the formaldehyde after which the styrene is added. The composition resulting from the above procedure has been identified as having the structure ##STR1## wherein X is hydroxyl, hydrogen or an alkyl group having 1 to 4 carbon atoms. An intermediate in making the above compound has been identified as having the structure.