Compound and method for producing the same
The invention provides a compound and method of producing the same. The method of the invention includes the following steps. First of all, Polycaprolactone (PCL), dimethylol propionic acid (DMPA), 4,4′-methylenebis (cyclohexyl isocyanate) (H12MDI), and dibutyltin dilaurate (DBT) are mixed in a solvent in the first place and a solution is formed. This solution is then mixed with triethylamine (TEA) and triethylene tetramine (TETA). After that, amino-terminated anionic waterborne polyurethane (WPU) is produced. A sol-gel process is proceeded with a mixture of amino-terminated anionic waterborne polyurethane, tetraethylorthosilicate (TEOS) without any extra catalyst, and a compound, waterborne polyurethane-silica nanocomposite materials, is eventually produced.
1. A method for producing a compound comprising the following steps:
mixing polycaprolactone, dimethylol propionic acid, 4,4′-methylenebis (cyclohexyl isocyanate) and dibutyltin dilaurate with a weight ratio in a solvent to form a first solution;
mixing the first solution with a triethylamine solution to form a second solution;
mixing the second solution with deionized water to form a second aqueous solution;
mixing the second aqueous solution with a triethylene tetramine solution to form a third solution;
filtering the third solution in a pressure-reducing environment to obtain a waterborne polyurethane solution, and the terminal of the waterborne polyurethane comprising an amino group; and
mixing the waterborne polyurethane solution with tetraethylorthosilicate to form a fourth solution;
which contains the compound.
2. The method of claim 1 , wherein the weight ratio of polycaprolactone:dimethylol propionic acid: 4,4′-methylenebis (cyclohexyl isocyanate):triethylamine:triethylene tetramine is 94.3:31.3:5.9:4.5:4.2.
3. The method of claim 1 , wherein the solvent is acetone.
4. The method of claim 3 , wherein the triethylamine solution is formed by mixing triethylamine with a first solvent, and the first solvent is acetone.
5. The method of claim 3 , wherein the triethylene tetramine solution is formed by mixing triethylene tetramine with a second solvent, and the second solvent is acetone.
6. The method of claim 1 , wherein the compound is formed at 55.degree. C., 75.degree. C., 100.degree. C. and 120.degree. C.
7. The method of claim 1 , wherein the amino group at a terminal of the waterborne polyurethane is primary amine.
8. The method of claim 1 , further comprising the following steps: stirring rapidly the waterborne polyurethane solution; and adding tetraethylorthosilicate into the waterborne polyurethane solution to form the fourth solution in-situ, wherein the addition of tetraethylorthosilicate induces a sol-gel process to produce the compound in the fourth solution.