Isocyanato terminated precursor and method of making the same
AssigneeLear Corporation
InventorsThomas N. Jones, Edmund J. Madaj
Life of this patent
Estimating the term…
Abstract
A method of making an isocyanato terminated precursor for polyurethane is disclosed. The method comprises heating an isocyanate containing about two or more isocyanato groups per molecule at a temperature of up to 80 degrees Celsius and at a pressure of about 1 atmosphere. The method further comprises mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate to vegetable oil for a predetermined time period to form the isocyanato terminated precursor.
Claims20
A method of making a polyurethane product from an isocyanato terminated precursor, the method comprising:
- heating an isocyanate containing about two or more isocyanato groups per molecule to a temperature of between about 25 and 70 degrees Celsius at a pressure of about 1 atmosphere;
- and
- adding a modified vegetable oil comprising about two or more hydroxyl groups per molecule to the isocyanate at a molar equivalent ratio of at least 2:1 of isocyanate to vegetable oil, the modified vegetable oil having a temperature of between about 25 and 70 degrees Celsius, the modified vegetable oil comprising a polymerized, oxidized vegetable oil;
- mixing the modified vegetable oil with the isocyanate for a predetermined time period to react the modified vegetable oil with the isocyanate to form the isocyanato terminated precursor;
- providing a polyol mixture (B-side reactants) comprising a base polyol, a catalyst and an additive;
- mixing the polyol mixture (B-side reactants) in a weight ratio with the isocyanato terminated precursor (A-side reactants) so that the active hydrogen content of the polyol mixture (B-side reactants) in equivalent units is between about 80:100 and 100:60 to the isocyanato equivalent units in the isocyanate precursor (A-side reactants), the polyol mixture (B-side reactants) are mixed with the isocyanato precursor (A-side reactants) at a predetermined pressure and a temperature of between about 20 and 50 degrees Celsius, defining a liquid polyurethane mixture;
- and
- reacting the polyurethane mixture in situ to form the polyurethane product.
A method of making a polyurethane product from an isocyanato terminated precursor, the method comprising:
- heating an isocyanate containing about two or more isocyanato groups per molecule to a temperature of up to 80 degrees Celsius at a pressure of about 1 atmosphere;
- and
- adding a modified vegetable oil comprising about two or more hydroxyl groups per molecule to the isocyanate at a molar equivalent ratio of at least 2:1 of isocyanate to vegetable oil, the modified vegetable oil comprising a polymerized, oxidized vegetable oil;
- mixing the modified vegetable oil with the isocyanate for a predetermined time period to react the modified vegetable oil with the isocyanate to form the isocyanato terminated precursor;
- providing a polyol mixture (B-side reactants) comprising base polyol and catalyst;
- mixing the polyol mixture (B-side reactants) in a weight ratio with the isocyanato terminated precursor (A-side reactants) so that the active hydrogen content of the polyol mixture (B-side reactants) in equivalent units is between about 80:100 and 100:60 to the isocyanato equivalent units in the isocyanate precursor (A-side reactants), mixture to define a liquid polyurethane mixture;
- and
- reacting the polyurethane mixture in situ to form the polyurethane product.
A method of making a polyurethane product from an isocyanato terminated precursor, the method comprising:
- heating an isocyanate containing about two or more isocyanato groups per molecule to a temperature of between about 25 and 70 degrees Celsius at a pressure of about 1 atmosphere;
- and
- adding a modified vegetable oil comprising about two or more hydroxyl groups per molecule to the isocyanate at a molar equivalent ratio of at least 2:1 of isocyanate to vegetable oil, the modified vegetable oil having a temperature of between about 25 and 70 degrees Celsius;
- mixing the modified vegetable oil with the isocyanate for a predetermined time period to react the modified vegetable oil with the isocyanate to form the isocyanato terminated precursor;
- providing a polymeric mixture (B-side reactants) comprising a base polyol and a catalyst;
- mixing the polyol mixture (B-side reactants) with the isocyanato terminated precursor (A-side reactants) define a liquid polyurethane mixture;
- and
- reacting the polyurethane mixture in situ to form the polyurethane product.
Dependencies are inferred from the claim text.