Patents (University of Northern Iowa)

Inventor

Gerard R. Thiel

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

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