Patents (University of Northern Iowa)
Document Type
Patent
Publication Date
8-26-2014
Patent Number
8815976 B2
Abstract
A system for use in forming polymer compositions, including as a replacement for phenolic based resin systems, for instance, in preparing foundry molds. In a preferred embodiment, the system includes the use of a) a polyermizable hydroxyl-containing component comprising a humic substance (as can be provided by lignite), b) an isocyanate component, and c) a catalyst, and preferably amine catalyst, component adapted to catalyze the polymerization of a) and b). The system is optionally used as binder system in the presence of a filler, such as, in combination with a foundry aggregate such as sand. A polymer system of this invention can be substantially free of formaldehyde or phenol, and preferably contains little or no aromatic solvents.
Application Number
12/742560
Assignee
University of Northern Iowa Research Foundation
Assignee City
Cedar Falls
Assignee State
Iowa
Assignee Country
United States
Filing Date
11-14-2008
Language
en
Recommended Citation
Thiel, Gerard R., "Humic substances-based polymer system" (2014). Patents (University of Northern Iowa). 4.
https://scholarworks.uni.edu/patents/4
