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

Active Publication Date: 2015-02-18
NANJING HONGBAOLI POLYURETHANE
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AI-Extracted Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of environmental pollution of waste polyurethane rigid foam, using ...
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Abstract

The invention relates to an open-pore polyurethane rigid foam prepared from a polyurethane rigid foam degradation liquid. The open-pore polyurethane rigid foam is prepared by reacting the polyurethane rigid foam degradation liquid, a polyhydric alcohol formula composition, a foaming agent and polyisocyanate, wherein the polyurethane rigid foam degradation liquid accounts for 0.1%-15% of the total weight of a material, the polyhydric alcohol formula composition accounts for 20%-52% of the total weight of the material, the foaming agent accounts for 0.3%-15% of the total weight of the material, and an isocyanate index is 70-140. According to the open-pore polyurethane rigid foam, the waste polyurethane rigid foam degradation liquid is firstly used for synthesizing the open-pore polyurethane foam with high aperture ratio and lower density, one the one hand, the problem of environmental pollution brought by a waste polyurethane rigid foam is solved, and on the other hand, the cost of raw materials is reduced, and considerable economic benefit is achieved. The prepared open-pore polyurethane rigid foam achieves the aperture ratio more than 70% and is low in density, thereby being a very good sound absorbing material used in building. The prepared open-pore polyurethane rigid foam is capable of providing an effective technical support for recycling the waste polyurethane rigid foam.

Technology Topic

IsocyanateChemistry +6

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  • Open-pore polyurethane rigid foam prepared from polyurethane rigid foam degradation liquid
  • Open-pore polyurethane rigid foam prepared from polyurethane rigid foam degradation liquid

Examples

  • Experimental program(10)

Example Embodiment

[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 stirring condition of 1000-3000r/min for 5- 8s, quickly pour the mixture into the wooden mold to allow it to foam freely;
[0037] (2) After 45-75s foaming is completed, place the foam at room temperature for more than 12 hours for performance testing.
[0038]Foam performance: free foam density 17.0kg/m 3 , The opening rate is 90%.

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 make it foam freely;
[0045] (2) After the foaming is completed in 45-75s, place the foam at room temperature for more than 12 hours for performance testing.
[0046] Foam performance: foam density 17.5kg/m 3 , The opening rate is 88%.

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 foaming is completed in 45-75s, place the foam at room temperature for more than 12 hours for performance testing.
[0054] Foam performance: foam density 18.5kg/m 3 , The opening rate is 85%.

PUM

PropertyMeasurementUnit
Hydroxyl value800.0mgKOH/g
Viscosity500.0mPa·s
Density17.0kg/m³

Description & Claims & Application Information

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