A kind of polyurethane and foamed cement micro-composite thermal insulation material and preparation method thereof
A technology of foamed cement and thermal insulation materials, which is applied to ceramic products, other household appliances, household appliances, etc. It can solve the problems of high bulk density, high brittleness, and low strength, and achieve high weather resistance, improved comprehensive performance, and stable composite interface Effect
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Embodiment 1
[0027] (1) Stir 100 parts of P.O.42.5 cement, 0.5 parts of PP chopped fiber, 2 parts of calcium formate, 1.5 parts of sodium dodecylbenzenesulfonate foam stabilizer with 50 parts of hot water at 45°C for 3 minutes according to the conventional method , quickly add 5 parts of hydrogen peroxide, and at the same time, stir at high speed for 10s, then pour into the mold, let it stand for 24hrs to demould, 48hrs to cut, then cured at room temperature to age and dried to constant weight.
[0028] (2), first 13 parts of crude diphenylmethane diisocyanate, 10 parts of polyether polyol, 0.2 part of polysiloxane polyether, 0.01 part of diisobutyltin dilaurate catalyst are mixed into a homogeneous slurry, and then the step (1) Submerge the prepared dry foamed cement in the slurry, take it out after the slurry is completely soaked into the foamed cement, and let it solidify for 2 hours;
[0029] (3) Immerse the foamed cement obtained in step (2) into water again, and with the diffusion an...
Embodiment 2
[0032] (1), 85 parts of P.O.42.5 cement, 15 parts of Class I fly ash, 1.0 parts of PP chopped fiber, 1.5 parts of calcium formate, and 2.0 parts of sodium lauryl sulfate foam stabilizer were mixed with 55 parts of 47 ℃ according to the conventional method. After stirring in hot water for 2 minutes, quickly add 5.3 parts of hydrogen peroxide, and at the same time stir at high speed for 10 seconds, then pour it into the mold, let it stand for 24 hours to remove the mold, cut it for 48 hours, and then cure it at room temperature until it reaches its age and dry it to constant weight.
[0033] (2), first 20 parts of polymethylene polyphenyl diisocyanate, 15 parts of polyether polyol, 0.4 part of polysiloxane polyether, 0.1 part of triethylenediamine catalyst are mixed into a uniform slurry, and then the step (1) Submerge the prepared dry foamed cement in the slurry, take it out after the slurry is completely soaked into the foamed cement, and let it solidify for 3 hours;
[0034] (3...
Embodiment 3
[0037] (1), 90 parts of P.C.32.5 cement, 10 parts of grade II fly ash, 0.7 part of PP chopped fiber, 1.0 part of calcium formate, 2.0 parts of α-alkenyl sulfonate sodium foam stabilizer with 47 parts of 40 according to the conventional method After stirring in hot water at ℃ for 2 minutes, quickly add 4.5 parts of hydrogen peroxide, and at the same time stir at high speed for 10 seconds, then pour into the mold, let it stand for 24 hours to demould, cut for 48 hours, and then cure at room temperature to age and dry to constant weight.
[0038] (2), first 10 parts of toluene diisocyanate, 9 parts of polyether polyols, 0.15 parts of polysiloxane polyethers, 0.2 parts of bis(dimethylaminoethyl) ether catalysts are mixed into a homogeneous slurry, and then the step ( 1) Immerse the prepared dry foamed cement in the slurry, take it out after the slurry is completely soaked into the foamed cement, and let it stand for 4 hours to solidify;
[0039] (3) Immerse the foamed cement obtai...
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