Polyol composition
A polyurethane composition reaction mixture including: (a) at least one organic isocyanate; and (b) at least one butylene oxide-based hydrophobic polyol; a process for making the above polyurethane composition; a polyurethane composite article composition, a process for making the above polyurethane composite article composition; and a process for making a composite article from the above polyurethane composite article composition.
1. A polyurethane composite composition comprising,
a first component comprising a reaction mixture of:
(a) at least one polyisocyanate compound; and
(b) a polyol composition comprising at least one butylene oxide-based hydrophobic polyol having a functionality of at least 3 or more present at a percent by weight (wt %) of the polyol composition ranging from 10 wt % to 30 wt %;
wherein the at least one polyisocyanate compound is present in an amount to provide an isocyanate index of the first component ranging from 80 to 115; and
a second component comprising a fiber material;
wherein the second component is present at a percent by weight (wt %) of the first component and the second component ranging from 40 wt % to 80 wt %.
2. The polyurethane composite composition of claim 1 , wherein the polyurethane composite composition has a reduced reactivity property in the range of from 5 percent to 50 percent as measured by a viscosity building-up method.
3. The polyurethane composite composition of claim 1 , wherein the polyurethane composite composition has a reduced water absorption property in the range of from 0.4 percent to 1.5 percent after 30 minutes of exposure to a moisture level of 53 percent at 22° C. as measured by the weight increase based water absorption method.
4. The polyurethane composite composition of claim 1 , wherein the at least one polyisocyanate is present in the composition at a concentration in the range of from 40 weight percent to 70 weight percent; and wherein the at least one butylene oxide-based hydrophobic polyol is present in the composition at a concentration in the range of from 2 weight percent to 40 weight percent.
5. The polyurethane composite composition of claim 1 , wherein the polyurethane composite composition further includes one or more of: (c) at least one ethylene oxide-based polyol, at least one propylene oxide-based polyol, or a mixture thereof; (d) at least one vegetable oil-based polyol; (e) at least one crosslinker; and (f) at least one surfactant.
6. The polyurethane composite composition of claim 1 , wherein the at least one butylene oxide-based hydrophobic polyol is selected from the group consisting of a glycerin-containing polyol, a pentaerythritol-containing polyol, a sorbitol-containing polyol, and mixtures thereof.
7. The polyurethane composite composition of claim 1 , wherein the polyol composition further comprises a vegetable oil-based polyol.
8. A process for producing a polyurethane composite article made from the above polyurethane composite article composition may include the steps of:
(I) providing a polyurethane composition comprising a mixture of:
(a) at least one polyisocyanate compound; and
(b) a polyol composition comprising at least one butylene oxide-based hydrophobic polyol having a functionality of at least 3 or more present at a percent by weight (wt %) of the polyol composition ranging from 10 wt % to 30 wt %;
wherein the at least one polyisocyanate compound is present in an amount to provide an isocyanate index of the first component ranging from 80 to 115; and
(II) contacting the polyurethane composition of step (I) with a structural material such that the structural material is coated with the polyurethane composition; and
(III) heating the structural material coated with the polyurethane composite article composition of step (II).