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:
Feb. 21, 1989
Filed:
Sep. 11, 1987
Applicant:
Inventor:
Wayne D Woodson, Danville, IL (US);
Assignee:
Ashland Oil, Inc., Russell, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08L / ; B22C / ; B22C / ;
U.S. Cl.
CPC ...
523139 ; 523144 ; 523145 ; 523141 ; 528405 ; 164 16 ; 264 83 ;
Abstract
Curable epoxy resin compositions are described which comprise a mixture of an acid curable epoxy resin and a minor amount of an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said epoxy resin. The curable epoxy resin composition may contain solid particulate materials. The procedures for curing such epoxy resins as well as methods for forming sand cores and molds also are described. Sand cores and molds produced in accordance with the method of the invention have sufficient strength and hardness after a few seconds of curing for normal foundry applications.