Premixed polyether polyol for polyurethane insulation board for electrothermic floor heating system and application method of premixed polyether polyol
A technology of polyurethane thermal insulation board and combined polyether, which is applied in the field of combined polyether, can solve the problem that it is difficult to satisfy flame retardancy and high compressive strength at the same time, and achieve the effects of good adhesion, high foam strength and stable performance.
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Embodiment 1
[0032] (1) Preparation of component A, 200kg: Weigh polyether polyol A: EDS-5083, 70kg (Jiangsu Changneng), polyether polyol B, SA460 (Bluestar Dongda), 23kg, polyether polyol C: 403 (Bluestar Dongda), 6kg, foam stabilizer L-6920 (Momentive), 1.5kg and AK-6688 (Momentive), 0.5kg, deionized water, 3kg, catalyst selection N, N -Dimethylcyclohexylamine, N,N,N',N",N"-pentamethyldiethylenetriamine, tetramethylethylenediamine, and a mixture of potassium isooctanoate, each weighing 2.2kg, 1kg, 1.5kg and 0.8kg, physical blowing agent HFC-365mfc / n-pentane (a mixture of HFC-365mfc and n-pentane, the weight ratio of the two is 29:21), 50kg, flame retardant TCPP, 40kg.
[0033] Add the weighed polyether polyol A, polyether polyol B, polyether polyol C, foam stabilizer, chemical foaming agent, catalyst, flame retardant, and physical foaming agent into the reaction kettle in sequence, at room temperature Stir for 0.5 hour and mix well.
[0034] (2) Weigh component B: diphenylmethane diisocyana...
Embodiment 2
[0037] (1) Prepare component A, prepare component A, 200kg: Weigh polyether polyol A: EDS-5083, 75kg (Jiangsu Changneng), polyether polyol B, SA460 (Bluestar Dongda), 18kg , Polyether polyol C: 403 (Bluestar Dongda), 2kg, foam stabilizer L-6952 (Momentive), 1kg and AK-6688 (Momentive), 1kg, deionized water, 2.2kg, catalyst Choose the mixture of N,N-dimethylcyclohexylamine, tetramethylethylenediamine, potassium isooctanoate, the weights are 3.1kg, 0.9kg and 1.8kg respectively, the physical blowing agent HFC-365mfc / n-pentane (HFC -A mixture of 365mfc and n-pentane, the weight ratio of the two is 29:21), 55kg, flame retardant TCPP, 20kg.
[0038] Add the weighed polyether polyol A, polyether polyol B, polyester polyol, foam stabilizer, chemical foaming agent, catalyst, flame retardant, and physical foaming agent into the reaction kettle in sequence, and at room temperature Stir for 0.8 hours and mix well.
[0039] (2) Weigh component B: diphenylmethane diisocyanate, 330kg.
[0040] (...
Embodiment 3
[0042] (1) Preparation of component A, 200kg: Weigh polyether polyol A: EDS-5083, 80kg (Jiangsu Changneng), polyether polyol B, SA460 (Bluestar Dongda), 22kg, foam stabilizer B -8545 (Evonik Degussa), 2kg and AK-6688 (Momentive), 1kg, water, 3kg, the catalyst is N,N-dimethylcyclohexylamine, N,N,N',N" ,N"-Pentamethyldiethylenetriamine, a mixture of tetramethylethylenediamine and potassium isooctanoate, weights are 1.4kg, 1.2kg, 0.9kg and 1.5kg, physical blowing agent HFC-365mfc / N-pentane (a mixture of HFC-365mfc and n-pentane, the weight ratio of the two is 29:21), 52kg, flame retardant TCPP, 35kg.
[0043] Add the weighed polyether polyol A, polyether polyol B, polyester polyol, foam stabilizer, chemical foaming agent, catalyst, flame retardant, and physical foaming agent into the reaction kettle in sequence, and at room temperature Stir for 1.0 hour and mix well.
[0044] (2) Weigh component B: polymethyl polyphenyl isocyanate, 324 kg.
[0045] (3) Component A and component B ar...
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