Phenolic foam external wall thermal insulation material and preparation method thereof
An external wall thermal insulation and phenolic foam technology, which is applied in the field of building external wall materials, can solve the problems of poor toughness, low thermal conductivity, high strength and oxygen index of thermal insulation boards, and achieves remarkable toughening effect, good flame retardancy and heat resistance. performance effect
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[0021] Example 1
[0022] A phenolic foam external wall thermal insulation material, calculated in parts by weight, including the following raw materials:
[0023] 65 parts of resole phenolic resin, 6 parts of calcium sulfate whiskers, 4 parts of Tween 80, 7 parts of cyclopentane, 12 parts of mixed acid of phosphoric acid and p-toluenesulfonic acid, and 4 parts of toughening agent. The toughening agent is nano hydrogen A mixture of alumina and graphite oxide in a 5 wt% sodium citrate solution.
[0024] The preparation method includes the following steps:
[0025] 1) Mix the resole phenolic resin, calcium sulfate whiskers, a mixed acid of phosphoric acid and p-toluenesulfonic acid, and a toughening agent at 50°C to obtain a mixture A;
[0026] 2) Mix the mixture A, Tween 80 and cyclopentane evenly, and quickly pour it into a preheated mold at 40°C for foaming and curing.
Example Embodiment
[0027] Example 2
[0028] A phenolic foam external wall thermal insulation material, calculated in parts by weight, including the following raw materials:
[0029] 60 parts of resole phenolic resin, 4 parts of calcium sulfate whiskers, 3 parts of Tween 80, 5 parts of n-pentane, 11 parts of hydrochloric acid and 3 parts of toughening agent. The toughening agent is nano aluminum hydroxide and graphite oxide in 3wt% The mixture formed in the sodium tartrate solution.
[0030] The preparation method includes the following steps:
[0031] 1) Mix the resole phenolic resin, hydrochloric acid, calcium sulfate whiskers and toughening agent uniformly at 40°C to obtain a mixture A;
[0032] 2) Mix the mixture A, Tween 80 and n-pentane evenly, and quickly pour it into a 30°C preheated mold for foaming and curing.
Example Embodiment
[0033] Example 3
[0034] A phenolic foam external wall thermal insulation material, calculated in parts by weight, including the following raw materials:
[0035] 68 parts of resole phenolic resin, 7 parts of calcium sulfate whiskers, 5 parts of Tween 80, 8 parts of n-pentane, mixed acid of phosphoric acid and p-toluenesulfonic acid (the mass ratio of phosphoric acid and p-toluenesulfonic acid is 3:1) 10 parts and 5 parts of toughening agent. The toughening agent is a mixture of nano aluminum hydroxide and graphite oxide in a 7wt% sodium lactate solution.
[0036] The preparation method includes the following steps:
[0037] 1) Mix the resole phenolic resin, calcium sulfate whiskers, a mixed acid of phosphoric acid and p-toluenesulfonic acid, and a toughening agent at 55°C to obtain a mixture A;
[0038] 2) Mix the mixture A, Tween 80 and n-pentane evenly, and quickly pour it into a preheated mold at 45°C for foaming and curing.
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