Multi-amino hyperbranched polyurethane material grafted SBS (Styrene Butadiene Styrene) and preparation method thereof as well as high-viscosity and high-elasticity asphalt and preparation thereof
A hyperbranched polyurethane and polyamine-based technology, which is applied in building insulation materials, buildings, building components, etc., can solve problems such as technical solutions for polyamine-based hyperbranched polyurethane-based asphalt modification that have not yet appeared
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[0040] The invention provides a preparation method of polyamine hyperbranched polyurethane material grafted SBS, comprising the following steps:
[0041] (1) After mixing cyclodextrin or its derivative, isocyanate, catalyst and polar solvent, perform a first-level reaction to generate a first-level product; continue to add polyethyleneimine for a second-level reaction to generate a polyamine-based hyperbranched polyurethane material ;
[0042] (2) SBS and another reactant are reacted in solvent to generate polymer;
[0043] The structural formula of the SBS is Among them, the molecular weight of SBS is 100,000-300,000, and the mass content of styrene is 20-40%;
[0044] Described another reactant is acrylic acid or maleic anhydride;
[0045] The structural formula of the polymer is
[0046] (3) the polyamine hyperbranched polyurethane material obtained in the step (1), the polymer obtained in the step (2), the solvent and the catalyst are mixed and reacted to generate t...
Embodiment 1
[0083] (1) Dissolve β-cyclodextrin in tetrahydrofuran, add diphenylmethane diisocyanate and catalyst dibutyltin dilaurate, react at 40°C for 12h, the isocyanate reacts with the hydroxyl group on cyclodextrin, and then the polymer Ethyleneimine was added and reacted at 30°C for 4 hours, and the isocyanate functional group reacted with the amine group to form a polyamine-based hyperbranched polyurethane material.
[0084] The molar ratio of β-cyclodextrin, isocyanate, catalyst and polyethyleneimine is 1:7.8:0.04:11; the mass ratio of β-cyclodextrin and polar solvent is 1:25;
[0085] (2) Dissolve SBS in a mixed solvent of THF and cyclohexane (the mass ratio of THF and cyclohexane is 1:9), then add acrylic acid to it, react at 49°C for 12h, add ethanol to precipitate the polymer, and then bake Dry.
[0086] The molar ratio of SBS and another reactant is 1:160;
[0087] (3) Dissolving the dried polymer with acetone, then adding the pre-synthesized polyamine-based hyperbranched p...
Embodiment 2
[0091] (1) Dissolve β-cyclodextrin in tetrahydrofuran, add toluene diisocyanate and catalyst bis-dimethylaminoethyl ether, react at 70°C for 12h, the isocyanate reacts with the hydroxyl group on cyclodextrin, and then the polyethylene Amine was added and reacted at 60°C for 4 hours, and the isocyanate functional group reacted with the amine group to generate a polyamine-based hyperbranched polyurethane material.
[0092] The molar ratio of β-cyclodextrin, isocyanate, catalyst and polyethyleneimine is 1:7:0.06:10; the mass ratio of β-cyclodextrin and polar solvent is 1:47;
[0093] (2) Dissolve SBS in a mixed solvent of THF and cyclohexane (the mass ratio of THF and cyclohexane is 1:9), then add acrylic acid to it, react at 61°C for 12 hours, add ethanol to precipitate the polymer, and then bake Dry.
[0094] The molar ratio of SBS and another reactant is 1:130;
[0095] (3) Dissolving the dried polymer with acetone, then adding the pre-synthesized polyamine-based hyperbranch...
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