Methods of forming isocyanate polymers
AssigneeHalliburton Company
InventorHomer C. McLaughlin
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Abstract
Methods of forming isocyanate polymers having long gellation times in the presence of water without the formation of excess foam.
Claims27
A method of forming an isocyanate polymer using a mixture having a long gelation time greater than at least 9 minutes in the presence of some free water comprising combining an organic di- or polyisocyanate compound with an hydroxylated organic polymer and a catalyst selected from the group consisting of triethylenediamine and Group 3 and 4 metal-organic compounds.
A method of forming an isocyanate polymer using a mixture having a long gelation time greater than at least 9 minutes in the presence of at least 0.2 parts free water per 100 parts mixture by weight comprising:
- combining a hydroxylated organic polymer and an organic di- or polyisocyanate compound with liquid solvent;
- and
- combining a catalyst selected from the group consisting of triethylenediamine and Groups 3 and 4 metal-organic compounds with said solution.
A method of forming an isocyanate polymer using a catalyst which does not accelerate gelation or cause excessive foaming in the presence of water comprising combining a di- or polyisocyanate compound with an alcoholic or acidic compound and a catalyst selected from the group consisting of triethylenediamine, Groups 3 and 4 metal-organic compounds and mixtures thereof.
Dependencies are inferred from the claim text.