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:
Jul. 05, 1977
Filed:
Jul. 14, 1975
Anthony Joseph Papa, Saint Albans, WV (US);
Union Carbide Corporation, New York, NY (US);
Abstract
Phenolic resoles are provided which are free of ionic species capable of being removed by the free acid form of a cation exchange resin and the free base form of an anion exchange resin. The deionized resoles of the invention have extended shelf-life due to their enhanced inherent stability towards self-condensation under otherwise adverse aging conditions. Notwithstanding their extended shelf-life, the resoles of the invention have excellent reactivity as foamable compositions, and are used with particular advantage for the formation of cellular phenolic resins. Also provided is a method for producing phenolic resoles having the aforementioned characteristics which comprises treatment of alkaline metal catalyzed condensates of a phenol and an aldehyde with cation and anion exchange resins in their respective free acid and free base forms.