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:
Oct. 04, 2016
Filed:
Jun. 04, 2014
Applicant:
Georgia-pacific Chemicals Llc, Atlanta, GA (US);
Inventors:
Richard A. Rediger, Conyers, GA (US);
Edward Lucas, Asbury, WV (US);
Assignee:
Georgia-Pacific Chemicals LLC, Atlanta, GA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D 161/00 (2006.01); C09D 161/06 (2006.01); B22C 1/22 (2006.01); C08G 8/10 (2006.01); C08L 59/00 (2006.01); C09D 159/00 (2006.01);
U.S. Cl.
CPC ...
C09D 161/06 (2013.01); B22C 1/2246 (2013.01); C08G 8/10 (2013.01); C08L 59/00 (2013.01); C09D 159/00 (2013.01); Y10T 428/2991 (2015.01); Y10T 428/2993 (2015.01); Y10T 428/2998 (2015.01);
Abstract
A phenol-formaldehyde novolac resin having a low concentration of free phenol prepared by distilling residual phenol from a molten novolac resin and replacing at least a portion of the phenol with a solvent having a volatility equal to or less than phenol. Such modified novolac resins are suitable for the production of resin coated molding sands for shell molding and sand cores, as well as for the production of resin coated proppants for use in oil and gas recovery operations.