Polymer polyol, method for producing the same, and method for producing polyurethane resin
A manufacturing method and polyol technology, applied in the field of polyurethane resin manufacturing, can solve the problems of high viscosity, mechanical properties of polyurethane resin (insufficient elongation at break, etc.), and achieve the effect of excellent mechanical strength
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Embodiment 1
[0272] Example 1 [Manufacture of Polymer Polyol (I-1)]
[0273]In a 4-neck flask equipped with a temperature regulator, a vacuum stirring blade, a dropping pump, a decompression device, a Dimroth cooling tube, a nitrogen inflow inlet and an outflow outlet, 193.6 parts of polyhydric alcohol (A1-1), 61.6 parts of xylene, 14.0 parts of dispersant (D-1) and 28.0 parts of active hydrogen-containing compound (d-1) were used as starting materials, and after nitrogen substitution, the temperature was raised to 130° C. under a nitrogen atmosphere (until the end of polymerization) and stirring. Next, 97.3 parts of polyol (A1-1), 84.0 parts of acrylonitrile, 196.0 parts of styrene, 0.3 parts of divinylbenzene, dispersant (D-1 ) 14.0 parts, 8.4 parts of xylene and 2.8 parts of radical polymerization initiator (k-1) were pre-mixed to obtain a mixed liquid (M-1) containing monomers, and polymerized at 130°C for 240 minutes to obtain a polymer polyol intermediate body (Z-1). The unreacted ...
Embodiment 2～6 and comparative example 1～4
[0274] Examples 2 to 6 and Comparative Examples 1 to 4 [Manufacture of Polymer Polyols (I-2) to (R-4)]
[0275] Except changing the composition of the starting material in Example 1 and the mixed solution containing the monomer to the parts shown in Table 1, the same operation was performed as in Example 1 to obtain polymer polyols (I-2)~ (I-6) and comparative polymer polyols (R-1) to (R-4). These polyols were measured and evaluated in the same manner as in Example 1. The results are shown in Table 2.
[0276]
[0277]
[0278] As can be seen from the results in Table 2, the volume average particle diameters of Examples 1-6 are smaller than those of Comparative Examples 1-4. In addition, it can be seen that Examples 1 to 6 have lower viscosities than Comparative Examples 1, 2, and 4 although the polymer content is substantially the same.
Embodiment 7～12 and comparative example 5～8
[0279] Examples 7-12 and Comparative Examples 5-8 [Manufacture of polyurethane foam]
[0280] Using the polymer polyols (I-1)~(I-6) obtained in Examples 1~6 and Comparative Examples 1~4 and the polymer polyols (R-1)~(R-4) of comparison, according to According to the compounding ratio described in Table 3, a polyurethane foam was produced under the foaming conditions shown below. Table 3 shows the measurement results of these foam physical properties. The foaming process is as follows.
[0281] (1) Adjust the temperature of polymer polyol, polyol (A1-1) and polyisocyanate to 25±2° C. respectively.
[0282] (2) Add polymer polyol, polyol (A1-1), foam stabilizer, water, and catalyst into a paper cup with a capacity of 1 liter in this order, stir and mix at room temperature (25°C±2°C), and immediately The polyisocyanate was added, and it stirred using the stirrer (homodisper: the Tokuku Kikika Co., Ltd. make, stirring conditions: 2000 rpm x 8 seconds), and it foamed.
[0283] ...
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