Anti-flaming thermal-insulation environmentally-friendly polymeric foaming material and method for producing the same
一种发泡材料、阻燃保温的技术,应用在阻燃保温环保聚合发泡材料领域,能够解决防火性能差、保温性能差等问题,达到耐老化性长、环保性能好、抵抗外界变形能力强的效果
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Embodiment 1
[0027] Preparation of urea-formaldehyde resin foam adhesive:
[0028] First put 200kg of 37% formaldehyde, 1.5g of polyvinyl alcohol 1788 and 20kg of glycerin into the reactor in turn, stir and raise the temperature to 40°C, adjust the pH to 4.0 with 30% formic acid, and the reaction time is 20 minutes, then add 70kg of Urea, react at 50°C for 40 minutes; then add 5kg of hexamethylenetetramine, adjust to pH=6.5 with 30% NaOH, add 20kg of urea, heat up to 90°C within 30 minutes, and react for 30-50 minutes ; Use ammonium chloride to adjust the pH to 5.0, then add calcium lignosulfonate to react at 80°C, then use a Tu-4 viscosity cup to measure the viscosity at 25°C, and the viscosity is 20-25 seconds as the end point; then adjust with 30% NaOH To pH = 7.5, add 10kg of urea and 5kg of thiourea, keep at 80°C for 30 minutes, then adjust to pH = 7.5 with 25% ammonia water, react at 60°C for 20 minutes, cool down to below 40°C and discharge;
[0029] Preparation of foaming agen...
Embodiment 2
[0032] Preparation of urea-formaldehyde resin foam adhesive:
[0033] First put 180kg of 37% formaldehyde, 1.2g of polyvinyl alcohol 2088 and 17kg of glycerin into the reactor in turn, stir and raise the temperature to 40°C, adjust the pH to 4.0 with 30% formic acid, and the reaction time is 20 minutes, then add 70kg of Urea, react at 50°C for 40 minutes; then add 6kg of hexamethylenetetramine, adjust to pH=6.5 with 30% NaOH, add 20kg of urea, heat up to 90°C within 30 minutes, and react for 30-50 minutes ; Use ammonium chloride to adjust to pH = 5.0, then add sodium lignosulfonate to react at 80°C, then use a Tu-4 viscosity cup to measure the viscosity at 25°C, and the viscosity is 20-25 seconds as the end point; then adjust with 30% NaOH To pH = 7.5, add 10kg of urea and 6kg of thiourea, keep at 80°C for 30 minutes, then adjust to pH = 7.5 with 25% ammonia water, react at 60°C for 20 minutes, cool down to below 40°C and discharge;
[0034] Preparation of foaming agent: ...
Embodiment 3
[0037] Preparation of urea-formaldehyde resin foam adhesive:
[0038] First put 220kg of 37% formaldehyde, 1.7g of polyvinyl alcohol 1799 and 23kg of glycerin into the reactor in turn, stir and raise the temperature to 40°C, adjust the pH to 4.0 with 30% formic acid, and the reaction time is 20 minutes, then add 98kg of Urea, react at 50°C for 40 minutes; then add 7kg of hexamethylenetetramine, adjust to pH=6.5 with 30% NaOH, add 28kg of urea, heat up to 90°C within 30 minutes, and react for 30-50 minutes ;Adjust the pH to 5.0 with ammonium chloride, then add ammonium lignosulfonate and react at 80°C, then measure the viscosity with a Tu-4 viscosity cup at 25°C and the end point is 20-25 seconds; then adjust with 30% NaOH To pH = 7.5, add 14kg of urea and 8kg of thiourea, keep at 80°C for 30 minutes, then adjust to pH = 7.5 with 25% ammonia water, react at 60°C for 20 minutes, cool down to below 40°C and discharge;
[0039] Preparation of foaming agent: first add 45kg of ...
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