US 10,369,623 B2Granted

Bio-based binder system

AssigneeUniversity of Northern Iowa Research Foundation

InventorsGerard R. Thiel, Shoshanna R. Coon, Mitchell Patterson, Andrew Simonson, Ian Williams, Ryan Jones

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Abstract

A bio-based binder system for use in preparing foundry molds. In a preferred embodiment, the system includes the use of a) a polyermizable hydroxyl-containing component comprising a saccharide, b) an isocyanate component, and c) a catalyst, and preferably amine catalyst, component adapted to catalyze the polymerization of a) and b), in the presence of a foundry aggregate such as sand. The system can be used in any suitable manner, including in either a cold box process or no bake process as described herein.

Claims18

Dependent claims

A process for making a foundry mold, the process comprising:

forming a mixture comprising:
a foundry aggregate,
a saccharide component which is underivatized,
an isocyanate component, and
a catalyst component capable of catalyzing polymerization of the saccharide component and the isocyanate component to form a polyurethane binder, and
allowing the saccharide component, the isocyanate component and the catalyst component to react to form the polyurethane binder, thereby forming the foundry mold,
wherein the mixture contains sufficient catalyst so that foundry work time of the mixture is between about 1 and about 30 minutes.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/199,312Filed 30 Jun 2016 · division
Priority: 14 Nov 2007
Published: US 2016/0311013 A127 Oct 2016
Granted: 6 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B22C 1/26
Of organic agents: of carbohydrates; of distillation residues therefrom
B22C 1/2273
Obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: polyurethanes; Polyisocyanates
C08G 18/6484
Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63: polysaccharides and derivatives thereof
C09J 175/04
Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers: polyurethanes

Family

Application60/987,947Us provisional application · filed 14 Nov 2007
PCT/US2008/083597Parent of this division · filed 14 Nov 2008
US 2016/0311013 A1Pre-grant publication · published 27 Oct 2016
Application12/742,551Parent of this division
US 2010/0319874 A1Published application
US 10,369,623 B2This patent

From the US filing history. Foreign family members aren’t listed.

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