Bis(N-alkylaminocyclohexyl)methanes as curing agents for polyurethanes and polyureas
AssigneeUop LLC
InventorsDavid W. House, Ray V. Scott, Jr., Mark J. Gattuso
Life of this patent
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Abstract
Bis(N-alkylaminocyclohexyl)methanes are excellent chain extenders in the formation of polyurethane and polyurea polymers, both elastomers and coatings, from both monomeric polyisocyanates and isocyanate-terminated prepolymers. Our chain extenders may be used alone or in combination with other polyamines and with polyols. A broad spectrum of polymeric material can be formed with a range of diverse properties.
Claims26
A process for preparing a polymer comprising reacting from about 0.9 to about 1.25 equivalents of a polyisocyanate reactant or mixture of polyisocyanate reactants with one equivalent of compounds having isocyanate-reactive hydrogens selected from the group consisting of 1) first polyamines, 2) blends of said first polyamines with polyols, 3) blends of said first polyamines with second polyamines, and 4) blends of said first polyamines with polyols and second polyamines, said first polyamines having the structure ##STR3## where R.sub.1 and R.sub.2 are independently selected from the group consisting of alkyl groups with from 1 up to about 10 carbon atoms, and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of hydrogen and alkyl groups with from 1 up to about 5 carbon atoms.
As a composition of matter, bis(N-alkylaminocyclohexyl)methanes having the structure ##STR4## where R.sub.1 and R.sub.2 are independently selected from the group consisting of alkyl groups with from 1 up to about 10 carbon atoms, and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of hydrogen and alkyl groups with from 1 to about 5 carbon atoms.
A polymer resulting from the reaction of from about 0.9 to about 1.25 equivalents of a polyisocyanate reactant or mixture of polyisocyanate reactants with one equivalent of compounds having isocyanate-reactive hydrogens selected from the group consisting of 1) first polyamines, 2) blends of said first polyamines with polyols, 3) blends of said first polyamines with second polyamines, and 4) blends of said first polyamines with polyols and second polyamines, said first polyamines having the structure ##STR5## where R.sub.1 and R.sub.2 are independently selected from the group consisting of alkyl groups with from 1 up to about 10 carbon atoms, and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of hydrogen and alkyl groups with from 1 up to about 5 carbon atoms.
Dependencies are inferred from the claim text.