Anti-flaming thermal-insulation environmentally-friendly polymeric foaming material and method for producing the same
A foaming material, flame retardant and thermal insulation technology, applied in the field of flame retardant thermal insulation polymer foaming material, can solve the problems of poor thermal insulation performance, poor fireproof performance, etc., and achieve good environmental protection performance, long aging resistance, and stable void structure Effect
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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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