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:
Jun. 13, 1995
Filed:
Oct. 04, 1993
Applicant:
Inventors:
Ken K Chang, Dublin, OH (US);
William R Dunnavant, Columbus, OH (US);
Robert B Fechter, Worthington, OH (US);
Gary R Hysell, Columbus, OH (US);
Assignee:
Ashland Inc., Columbus, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ; B22C / ;
U.S. Cl.
CPC ...
525480 ; 525390 ; 525508 ; 524594 ; 524736 ; 524492 ; 523145 ; 528129 ;
Abstract
The invention relates to an ester cured no-bake foundry binder system preferably comprising as separate components (a) an aqueous basic solution of a phenolic resole resin; and (b) a hardener comprising (i) a polyphenol resin, and (ii) a liquid ester. Alternatively, the polyphenol resin can be used as a separate component. The foundry binder systems produce foundry shapes with improved tensile strengths when compared to foundry shapes which are prepared from foundry binder systems which do not contain a polyphenol resin.