Polyurethane sound-absorbing material based on two vegetable oil bases and preparation method thereof
A sound-absorbing material and vegetable oil-based technology, applied in the field of acoustic packaging materials, can solve the problems of inability to meet the acoustic performance requirements of sound-absorbing materials and large environmental pollution, and achieve the effects of easy decomposition and processing, low preparation cost, and good sound insulation performance
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[0045] Such as figure 1 As shown, the present invention also provides a method for preparing a polyurethane sound-absorbing material based on two vegetable oil bases, which is used to prepare the polyurethane sound-absorbing material based on two vegetable oil bases, and the preparation method includes the following steps:
[0046] Step 1. According to mass parts, 25~35 parts of coconut oil polyol, 5~20 parts of rapeseed oil polyol, 50~70 parts of polyether polyol, 1.5~2.5 parts of foaming agent, 1.5~2.5 parts of foam stabilizer Parts, chain extender 2 to 4 parts, first catalyst 4 to 6 parts, second catalyst 1.5 to 2.5 parts; obtain coconut oil polyol, rapeseed oil polyol, polyether polyol, foaming agent, The foam stabilizer, the chain extender, the first catalyst and the second catalyst are sequentially added into the paper cup.
[0047] Preferably, the polyether polyol is polyether polyol 3630; the blowing agent is deionized water, the chain extender is triethanolamine, the foam ...
Embodiment 1
[0055] According to the mass parts, 25 parts of coconut oil polyol, 10 parts of rapeseed oil polyol, 50 parts of polyether polyol 3630, 1.5 parts of blowing agent (deionized water), 2 parts of chain extender (triethanolamine), 4 parts of catalyst A1, 1.5 parts of catalyst A33, and 1.5 parts of foam stabilizer (silicone oil) were sequentially added to the paper cup, and after standing for 1 minute, at room temperature, stirred with a mixer at a stirring speed of 1000 rpm for 50 seconds to obtain a first mixture.
[0056] According to the number of parts by mass, after adding 50 parts of isocyanate MDI to the first mixture after standing, mix and stir for 10 seconds at a stirring speed of 1200 rpm to obtain a creamy yellow second mixture;
[0057] Pour the second mixture into the mold quickly, and spread it as evenly as possible in the mold, cover the mold cover for closed-mold foaming; put the foamed material in a thermostat for curing for 2 hours, and then take it out, Put it at ro...
Embodiment 2
[0061] According to the mass parts, 30 parts of coconut oil polyol, 10 parts of rapeseed oil polyol, 60 parts of polyether polyol 3630, 2 parts of foaming agent (deionized water), 3 parts of chain extender (triethanolamine), 5 parts of catalyst A1, 2 parts of catalyst A33, and 1.8 parts of foam stabilizer (silicone oil) were added to the paper cup in order, and after standing for 1 minute, the mixture was stirred at room temperature with a mixer at a stirring speed of 1000 rpm for 60 seconds to obtain the first mixture.
[0062] According to the number of parts by mass, after adding 55 parts of isocyanate MDI to the first mixture after standing, mix and stir for 10 seconds at a stirring speed of 1200 rpm to obtain a creamy yellow second mixture;
[0063] Pour the second mixture into the mold quickly, and spread it as evenly as possible in the mold, cover the mold cover for closed-mold foaming; put the foamed material in a thermostat for curing for 2 hours, and then take it out, Put...
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