Polyurethene resin forming composition for use in sealing membrane module
A technology of polyurethane resin and sealing material, applied in the field of polyurethane resin-forming composition, can solve the problems of curability, insufficient resin physical properties, increased viscosity of mixed liquid, and formation of special smell, etc., and achieves excellent durability, improved productivity, and odor. and excellent safety effect
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[0133] Hereinafter, the present invention will be further specifically described through examples, but the present invention is not limited thereto. Parts hereinafter represent parts by weight.
[0134]
[0135] Into a stainless steel autoclave equipped with a stirring device, a temperature control device, a heat exchanger as a condensing device, a raw material supply line, and an exhaust line, the PO adduct of glycerin [Sanyo Chemical Industry Co., Ltd. "Sunnix GP-600 ": primary conversion rate=2%, hydroxyl value=280mgKOH / g, degree of unsaturation is 0.002meq / g] 600 parts, TPB0.09 part and diphenylpropylphosphine rhodium chloride 0.1 part, then start to stir, will The pressure inside the autoclave and condensing equipment is reduced to 0.005MPa. While controlling to keep the reaction temperature at 70 to 80°C, 1,670 parts of PO was continuously injected into the liquid phase through the raw material supply line over 12 hours. Refrigerant at -30°C is circulated in the cond...
manufacture example 5～7
[0151] In a four-necked flask equipped with a stirring device, a thermometer, and a nitrogen introduction tube, 750 parts of each of (a-1) to (a-3) obtained in Production Examples 1 to 3 and 250 parts of each of THPED were dropped into the four-necked flask. It stirred and mixed at 50 degreeC for 1 hour, and obtained 1000 parts each of polyol components (A-1)-(A-3). (A-1) had a hydroxyl value of 252 mgKOH / g, a viscosity of 610 mPa·s / 25° C., a total degree of unsaturation of 0.002 meq / g, and a content of by-produced low boiling point compounds (t) of 0.001% by weight. (A-2) had a hydroxyl value of 310 mgKOH / g, a viscosity of 540 mPa·s / 25° C., a total degree of unsaturation of 0.001 meq / g, and a content of by-product low boiling point compounds (t) of 0.002% by weight. (A-3) had a hydroxyl value of 274 mgKOH / g, a viscosity of 430 mPa·s / 25° C., a total degree of unsaturation of 0.001 meq / g, and a content of by-product low boiling point compounds (t) of 0.002% by weight.
[0152]...
Embodiment 1～8 and comparative example 1～5
[0165] Using polyol components (A-1) to (A-6) and (A'-1) to (A'-4), and organic polyisocyanate components (B-1) and (B-2), the weight The ratios are shown in Table 1 as the polyurethane resin-forming composition of the present invention and the polyurethane resin-forming composition for comparison. For each composition, the viscosity before injection molding of the mixture, the hardness of the cured product after molding and curing, tensile strength, odor, dissolution and taste of the mixture were tested by the following methods, and the results are listed in Table 1. It should be noted that the primary conversion rate of the polyoxyalkylene polyol (a) described in Example 8 of Table 1 is the polyoxyalkylene polyol used to produce the polyoxyalkylene polyol (b-1). The value of the primary conversion rate of the unpurified product of the polyol (a-3).
[0166]
[0167] The polyol component (A) and the organic polyisocyanate component (B) were uniformly mixed at 25°C, and the...
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