Catalyst for Non-Isocyanate Based Polyurethane

• US 20150247004A1
• Filed: 03/02/2015
• Published: 09/03/2015
• Est. Priority Date: 03/03/2014
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.), Northwestern University
• Original Assignee: Dow Global Technologies LLC (Dow, Inc.), Northwestern University
• Inventors: Scheidt, Karl, Heath, William H., Wilmot, Nathan, Lombardo, Vincent, Leitsch, Emily, Torkelson, John, Dhulst, Elizabeth
• Granted Patent: US 9,260,564 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C08F 283/006 on to polymers provided for in C08G18/00 C08F283/004 takes precedence
• CPC Class Codes: C08G 2190/00 Compositions for sealing or packing joints
• CPC Class Codes: C08G 71/04 Polyurethanes

Abstract

A cooperative catalyst system includes a Lewis acid and a Lewis base for the formation of non-isocyanate based polyurethane using a cyclic carbonate and an amine. A method of forming non-isocyanate based polyurethane includes providing a cyclic carbonate, an amine, and a cooperative catalyst system that has a Lewis acid and a Lewis base.

Claims

1. A method for producing non-isocyanate based polyurethane, the method comprising:

providing a cyclic carbonate component,

providing an amine component, and

providing a cooperative catalyst component that performs cyclic carbonate ring opening and includes an oxyphilic Lewis acid and an organic Lewis base.

2. The method as claimed in claim 1, wherein the Lewis acid is a lithium salt.

3. The method as claimed in claim 2, wherein the lithium salt is lithium triflate.

4. The method as claimed in claim 1, wherein the Lewis base is a cyclic amidine or a cyclic guanidine.

5. The method as claimed in claim 1, wherein the cooperative catalyst component includes a molar amount of the Lewis acid that is the same as or less than a molar amount of the Lewis base.

6. The method as claimed in claim 1, wherein the Lewis acid is present in an amount from 1 mol % to 50 mol %, based on the total moles of the Lewis acid per the total moles of amine functional groups in the amine component.

7. The method as claimed in claim 1, wherein the Lewis base is present in an amount from 1 mol % to 60 mol %, based on the total moles of the Lewis base per the total moles of amine functional groups in the amine component.

8. A cooperative catalyst component for forming a non-isocyanate based polyurethane polymer using a cyclic carbonate component and an amine component, the cooperative catalyst component comprising an oxyphilic Lewis acid and an organic Lewis base.

9. A non-isocyanate based polyurethane polymer, comprising a urethane linkage that is the reaction product of a cyclic carbonate component and an amine component formed in the presence of a cooperative catalyst component that includes an oxyphilic Lewis acid and an organic Lewis base.