Open-pore polyurethane rigid foam prepared from polyurethane rigid foam degradation liquid
A technology of rigid foam and polyurethane, which is applied in the field of open-cell polyurethane rigid foam, open-cell polyurethane rigid foam and its preparation, and can solve the problems of low density, environmental pollution of waste polyurethane rigid foam, high open cell rate, etc. Achieve the effects of low density, considerable economic benefits, and good sound-absorbing materials
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[0030] Example 1
[0031] An open-cell polyurethane rigid foam prepared from a polyurethane rigid foam degradation solution, the formula is as follows:
[0032] Among them, polyurethane rigid foam degradation solution is prepared by reacting butanediol and rigid polyurethane foam under the action of catalyst triethylamine at 150 °C for 12 hours. Its hydroxyl value is 800 mgKOH / g, and its viscosity is 500 mPa·s (25 °C). , polyether polyol A is polyether 330N (Shanghai Gaoqiao), polyether polyol B is H4110III (Nanjing Hongbaoli), polyester polyol PS‐2352 (Stepan)
[0033] Polyurethane rigid foam degradation liquid
[0034] 1,1,1,3,3‐pentafluoropropane
[0035] The open-cell polyurethane rigid foam of the present invention can be prepared by the following method:
[0036] (1) The combined polyether formula mixture and M20S (Basf) were heated to 20±1°C respectively, then M20S (Basf) was added to the combined polyether formula mixture, and mixed under the stirr...
Example Embodiment
[0039] Example 2
[0040] A kind of open cell polyurethane rigid foam prepared by polyurethane rigid foam degradation liquid, formula is as follows:
[0041] Among them, the polyurethane rigid foam degradation solution is prepared by reacting butanediol and rigid polyurethane foam plastics under the action of catalyst sodium hydroxide at 200°C for 6 hours, its hydroxyl value is 760mgKOH / g, and its viscosity is 1500mPa·s (25°C) , polyether polyol A is polyether 330N (Shandong Dongda), polyether polyol B is H6035 (Nanjing Hongbaoli)
[0042] Polyurethane rigid foam degradation liquid
[0043] Open-cell polyurethane rigid foam of the present invention can adopt following method to prepare:
[0044] (1) Heat the combined polyether formula mixture and PAPI135 (Dow) to 20±1°C respectively, then add PAPI135 (Dow) to the combined polyether formula mixture, and mix under the stirring condition of 1000‐3000r / min for 5‐ 8s, quickly pour the mixture into the wooden mold to mak...
Example Embodiment
[0047] Example 3
[0048] A kind of open cell polyurethane rigid foam prepared by polyurethane rigid foam degradation liquid, formula is as follows:
[0049] Among them, the polyurethane rigid foam degradation solution is prepared by reacting butanediol and rigid polyurethane foam plastics under the action of catalyst potassium hydroxide at 150°C for 8 hours, its hydroxyl value is 710mgKOH / g, and its viscosity is 2500mPa·s (25°C) , polyether polyol A is polyether H6000 (Nanjing Hongbaoli), polyether polyol B is H4110III (Nanjing Hongbaoli)
[0050] Polyurethane rigid foam degradation liquid
[0051] Open-cell polyurethane rigid foam of the present invention can adopt following method to prepare:
[0052] (1) Heat the combined polyether formula mixture and M20S (Basf) to 20±1°C respectively, then add M20S (Basf) to the combined polyether formula mixture, and mix for 5- 8s, quickly pour the mixture into the wooden mold to make it foam freely;
[0053] (2) After the ...
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