Bio-based non-isocyanate polyurethane and preparation method thereof
A non-isocyanate, bio-based technology, applied in the field of bio-based polymer materials, can solve the problems of high price, limited production of limonene, and restrictions on the large-scale production of non-isocyanate polyurethane
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[0057] The invention provides a kind of preparation method of bio-based non-isocyanate polyurethane, comprising the following steps:
[0058] 1) react bio-based polyester diol and epichlorohydrin under the effect of catalyst to obtain bio-based polyester diglycidyl ether intermediate;
[0059] 2) placing the bio-based polyester diglycidyl ether intermediate in a carbon dioxide atmosphere, and reacting under the action of a catalyst to obtain a bio-based polyester bicyclic carbonate intermediate;
[0060] 3) The bio-based polyester bicyclic carbonate intermediate is reacted with an amine compound to obtain a bio-based non-isocyanate polyurethane.
[0061] In the present invention, the bio-based polyester diol is hydroxyl-terminated polylactic acid, hydroxyl-terminated poly(ε-caprolactone), and hydroxyl-terminated polyethylene furandicarboxylate obtained by monomer-initiated polymerization. and one or more of hydroxyl-terminated polybutylene furandicarboxylates, preferably hydr...
Embodiment 1
[0076] 1) Add hydroxyl-terminated polylactic acid (x=3, y=3), epichlorohydrin and tetrabutylammonium bromide obtained by ethylene glycol initiation into the reactor at a molar ratio of 1.0:10.0:0.02, and the reaction temperature The temperature is 60°C, the reaction time is 12 hours, the reactant is filtered, the filtrate is washed with water, dried, and distilled under reduced pressure to obtain the polylactic acid diglycidyl ether intermediate;
[0077] 2) Add the polylactic acid diglycidyl ether intermediate and tetrabutylammonium bromide into the reactor according to the molar ratio of 1.0:0.02, pass in carbon dioxide, replace with air for 3 times, and then set the carbon dioxide pressure in the reactor to 0.3MPa , the reaction temperature is 120°C, the reaction time is 6 hours, the filtrate is washed with water to remove the catalyst, and the polylactic acid bicyclic carbonate intermediate is obtained after drying;
[0078] 3) Mix the polylactic acid bicyclocarbonate inte...
Embodiment 2
[0081] 1) Add hydroxyl-terminated polylactic acid (x=3, y=3), epichlorohydrin and tetrabutylammonium iodide to the reactor according to the molar ratio of 1.0:50.0:0.05, and the reaction temperature The temperature is 80°C, the reaction time is 4 hours, the reactant is filtered, the filtrate is washed with water, dried, and distilled under reduced pressure to obtain a polylactic acid diglycidyl ether intermediate;
[0082] 2) Add the polylactic acid diglycidyl ether intermediate and tetrabutylammonium iodide into the reactor according to the molar ratio of 1.0:0.05, pass in carbon dioxide, replace with air for 3 times, and then set the carbon dioxide pressure in the reactor to 1.0MPa , the reaction temperature is 100°C, the reaction time is 10 hours, the filtrate is washed with water to remove the catalyst, and the polylactic acid bicyclic carbonate intermediate is obtained after drying;
[0083] 3) Mix the polylactic acid bicyclic carbonate intermediate and menthanediamine ev...
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