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. 04, 1991
Filed:
Mar. 24, 1989
Applicant:
Inventors:
David R Armbruster, Forest Park, IL (US);
Merlyn C Pasion, Chicago, IL (US);
Assignee:
Acme Resin Corporation, Westchester, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08L / ; B22C / ; B22C / ;
U.S. Cl.
CPC ...
528129 ; 528139 ; 528140 ; 524594 ; 524595 ; 524596 ; 524611 ; 523143 ; 523145 ; 523146 ; 523147 ; 264 82 ; 164 12 ; 164 16 ;
Abstract
Modified benzylic ether resole resins and process for their preparation. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of a divalent metal ion catalyst at a pH below 7 followed by further reaction at a pH above 8 in the presence of an alkaline catalyst. Alkaline solutions of the resins are used as foundry binders in an ester cure process.