Polyol prepolymers of natural oil based polyols
AssigneeDow Global Technologies LLC
InventorsFrancois M. Casati, Imran Munshi
Life of this patent
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Abstract
A polyol prepolymer having at least one urethane group is disclosed. The polyol preopolymer is a reaction product of at least one isocyanate and a polyol blend, where the polyol blend includes at least one conventional petroleum-based polyol and at least one natural oil based polyol. The polyol prepolymer may be used in producing flexible polyurethane foams.
Claims20
A polyol prepolymer having at least one urethane group, comprising a reaction product of at least one isocyanate and a polyol blend, wherein the polyol blend comprises at least one conventional petroleum-based polyol and at least one natural oil based polyol, the isocyanate is reacted at an isocyanate index of between about 5 and about 80, and the polyol prepolymer has a viscosity of between about 3000 mPa·s and about 30000 mPa·s at 25° Celsius.
A flexible polyurethane foam, comprising a reaction product of at least:
- a) at least one polyol prepolymer, wherein the at least one polyol preopolymer comprises a reaction product of at least one first isocyanate and a polyol blend, wherein the polyol blend comprises at least one conventional petroleum-based polyol and at least one a natural oil based polyol, the at least one first isocyanate is reacted at an isocyanate index of between about 5 and about 80, and the polyol prepolymer has a viscosity of between about 3000 mPa·s and about 30000 mPa·s at 25° Celsius;
- and
- b) at least one second isocyanate.
A method for producing a polyol prepolymer, comprising:
- providing a polyol blend comprising at least one conventional petroleum-based polyol and at least one natural oil based polyol;
- and
- reacting the polyol blend with at least one isocyanate at an isocyanate index of between about 5 and about 80 to form the at least one polyol prepolymer, such that the polyol prepolymer has a viscosity of between about 3000 mPa·s and about 30000 mPa·s at 25° Celsius.
A method for producing a flexible polyurethane foam, comprising:
- forming at least one polyol prepolymer in a process comprising:
- providing a polyol blend comprising at least one conventional petroleum-based polyol and at least one natural oil based polyol, and
- reacting the polyol blend with at least one first isocyanate at an isocyanate index of between about 5 and about 80 to form the at least one polyol prepolymer, such that the polyol prepolymer has a viscosity of between about 3000 mPa·s and about 3000 mPa·s at 25° Celsius, and
- reacting at least the at least one polyol prepolymer with at least one second isocyanate to form a polyurethane foam.
Dependencies are inferred from the claim text.