Phenolic foam heat insulation board and production method thereof
A phenolic foam and thermal insulation board technology is applied in the field of thermal insulation materials, which can solve the problems of poor toughness and high acidity of thermal insulation boards, and achieve the effects of good dispersion, improved thermal stability and flame retardant performance.
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[0023] Example 1
[0024] A phenolic foam insulation board, calculated in parts by weight, including the following raw materials:
[0025] 75 parts of phenolic resin, 7 parts of modified nano-silica, 6 parts of toughening agent, 5 parts of Tween 80, 12 parts of phosphoric acid and 6 parts of cyclopentane.
[0026] The modified nano-silica is prepared by the following method: dissolve the nano-silica in ethyl acetate, heat to 50℃ in a water bath, adjust the pH to 8.5 with ammonia water, add KH560 for reaction, the reaction time is 20h, and then centrifuge Washing to obtain modified nano silica. The molar ratio of KH560 to nano silica is 5:1.
[0027] The toughening agent is a mixture of polyethylene glycol and acrylic styrene copolymer emulsion, wherein the mass percentage of acrylic styrene copolymer emulsion is 30%, and the percentage of polyethylene glycol is 70%.
[0028] Preparation:
[0029] 1) Preparation of modified nano-silica: dissolve nano-silica in ethyl acetate, heat to 50℃...
Example Embodiment
[0032] Example 2
[0033] A phenolic foam insulation board, calculated in parts by weight, including the following raw materials:
[0034] 70 parts of phenolic resin, 5 parts of modified nano silica, 4 parts of toughening agent, 806 parts of Tween, 10 parts of p-toluenesulfonic acid and 4 parts of n-pentane.
[0035] The modified nano-silica is prepared by the following method: dissolve the nano-silica in ethyl acetate, heat it to 40℃ in a water bath, adjust the pH to 8 with ammonia water, add KH550 for reaction, the reaction time is 18h, and then centrifuge Washing to obtain modified nano silica. The molar ratio of KH550 to nano silica is 6:1.
[0036] The toughening agent is a mixture of polyethylene glycol and acrylic styrene copolymer emulsion, wherein the mass percentage of acrylic styrene copolymer emulsion is 40%, and the percentage of polyethylene glycol is 60%.
[0037] Preparation:
[0038] 1) Preparation of modified nano-silica: dissolve nano-silica in ethyl acetate, heat to...
Example Embodiment
[0041] Example 3
[0042] A phenolic foam insulation board, calculated in parts by weight, including the following raw materials:
[0043] 80 parts of phenolic resin, 10 parts of modified nano-silica, 8 parts of toughening agent, 803 parts of Tween, 15 parts of hydrochloric acid, and 8 parts of n-pentane.
[0044] The modified nano-silica is prepared by the following method: dissolve the nano-silica in ethyl acetate, heat to 60℃ in a water bath, adjust the pH to 9 with ammonia water, add KH560 for reaction, the reaction time is 24h, and then centrifuge Washing to obtain modified nano silica. The molar ratio of KH560 to nano silica is 4:1.
[0045] The toughening agent is a mixture of polyethylene glycol and acrylic styrene copolymer emulsion, wherein the mass percentage of acrylic styrene copolymer emulsion is 35%, and the percentage of polyethylene glycol is 65%.
[0046] Preparation:
[0047] 1) Preparation of modified nano-silica: dissolve nano-silica in ethyl acetate, heat to 60℃ i...
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