Polymer blend based on polycarbonate polyols
A polycarbonate and polyol technology, applied in polyurea/polyurethane coatings, devices for coating liquid on surfaces, coatings, etc., can solve problems such as no description
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0120] Embodiment 1 polyester polyol
[0121] Into a 15 liter reaction vessel with stirrer, heating device and water separator and cooler were added 1281 grams of phthalic anhydride, 5058 grams of adipic acid, 6387 grams of 1,6-hexanediol and 675 grams of neopentyl glycol , the initial charge was heated to 140° C. under nitrogen over 1 hour. During a further 9 hours it was heated to 220°C and condensation was carried out at this temperature until the acid number was less than 3. The viscosity of the polyester polyol thus obtained (determined according to the time it takes for an 80% strength polyester solution in methoxypropyl acetate to flow out of a DIN 4 cup at 23° C.) is 54 seconds and the OH number is 160 mg KOH / gram.
Embodiment 2
[0122] Embodiment 2 Based on 1,4-butanediol and 1, the preparation of the polycarbonate diol of 6-hexanediol
[0123] 1223 grams of 1,4-butanediol and 535 grams of 1,6-hexanediol were added to the flask and heated to 100°C. Finally, nitrogen gas was passed through the diol mixture at a flow rate of 2 liters / hour, a vacuum of 20 mbar was applied, and the mixture was dehydrated until (about 2 hours) the water content was ≤0.1%.
[0124] Then, 0.44 g of ytterbium(III) acetylacetonate was added and the diol mixture was heated to 110°C. Then 2297 g of dimethyl carbonate were added over about 20 minutes and the reaction mixture was maintained at reflux for 24 hours. Finally, the temperature was raised to 150°C and the resulting distillate was removed. Then the temperature was further raised to 180° C., and distillation was carried out again.
[0125] The reaction mixture was cooled to 130°C and the pressure was reduced to 10 mbar. The temperature of the oil bath was then raised ...
Embodiment 3
[0128] Embodiment 3 is based on 1, the preparation of the polycarbonate diol of 4-butanediol and 1,6-hexanediol
[0129] 1239 grams of 1,4-butanediol and 542 grams of 1,6-hexanediol were added to the flask and heated to 100°C in an oil bath. Finally, nitrogen gas was passed through the diol mixture at a flow rate of 2 liters / hour, a vacuum of 20 mbar was applied, and the mixture was dehydrated until (about 2 hours) the water content was ≤0.1%.
[0130] Then, 0.44 g of ytterbium(III) acetylacetonate was added and the diol mixture was heated to 110°C. Then 2180 g of dimethyl carbonate were added over about 20 minutes and the reaction mixture was maintained at reflux for 24 hours. Finally, the temperature was raised to 150°C and the resulting distillate was removed. Then the temperature was further raised to 180° C., and distillation was carried out again.
[0131] The reaction mixture was cooled to 130°C and the pressure was reduced to 10 mbar. The temperature of the oil bat...
PUM
| Property | Measurement | Unit |
|---|---|---|
| hydroxyl value | aaaaa | aaaaa |
| hydroxyl value | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More