Preparation method of flame retardant and thermal insulation polyurethane foam
A polyurethane foam, flame retardant and thermal insulation technology, applied in the field of polyurethane foam preparation, can solve the problems of life-threatening, poor flame retardancy, high and low temperature resistance, etc., to ensure uniformity of dispersion, improve thermal insulation effect, and The effect of burning effect enhancement
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Embodiment 1
[0037] A kind of preparation method of flame-retardant thermal insulation polyurethane foam, described preparation method comprises the following steps:
[0038] S.1 Preparation of organosilicon-modified expanded graphite: Treat the expanded graphite with a silane coupling agent to obtain an organosilicon-modified expanded graphite whose core is expanded graphite and the outer layer is a silicone resin layer;
[0039] The specific steps are as follows:
[0040] (1) Surface activation: in parts by weight, get 100 parts of expanded graphite, add 0.5 part of ferrous chloride therein, after mixing uniformly, place in the reactor, and replace the original air with nitrogen in the reactor, And feed water vapor containing 0.005% acetic acid vapor into it by volume percentage, raise the temperature to 105°C, keep the air pressure in the reactor at 6.0MPa, stir and activate for 45 minutes and then drop to room temperature, wash with water to neutrality, and obtain the obtained Surface...
Embodiment 2
[0050] A kind of preparation method of flame-retardant thermal insulation polyurethane foam, described preparation method comprises the following steps:
[0051] S.1 Preparation of organosilicon-modified expanded graphite: Treat the expanded graphite with a silane coupling agent to obtain an organosilicon-modified expanded graphite whose core is expanded graphite and the outer layer is a silicone resin layer;
[0052] The specific steps are as follows:
[0053] (1) surface activation: according to parts by weight, get 100 parts of expanded graphite, add 2 parts of ferrous chloride wherein, after mixing uniformly, be placed in reactor, lead nitrogen to replace original air in reactor, And feed water vapor containing 0.05% acetic acid vapor into it by volume percentage, raise the temperature to 125°C, keep the air pressure in the reactor at 9.5MPa, stir and activate for 100 minutes and then drop to room temperature, wash with water to neutrality, and obtain the obtained Surface...
Embodiment 3
[0063] A kind of preparation method of flame-retardant thermal insulation polyurethane foam, described preparation method comprises the following steps:
[0064] S.1 Preparation of organosilicon-modified expanded graphite: Treat the expanded graphite with a silane coupling agent to obtain an organosilicon-modified expanded graphite whose core is expanded graphite and the outer layer is a silicone resin layer;
[0065] The specific steps are as follows:
[0066] (1) Surface activation: according to parts by weight, get 100 parts of expanded graphite, add 1 part of ferrous chloride therein, after mixing uniformly, place in the reactor, and replace the original air with nitrogen in the reactor, And feed water vapor containing 0.015% acetic acid vapor into it by volume percentage, raise the temperature to 115° C., keep the air pressure in the reactor at 7.5 MPa, stir and activate for 60 minutes and then drop to room temperature, wash with water to neutrality, and obtain the obtain...
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