Flame retardant polyurethane sealant
A polyurethane sealant and polyurethane resin technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as failure to meet flame retardant requirements, poor sealant performance, etc., to achieve good elasticity, Good adhesion, good storage stability
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Embodiment 1
[0025] A flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:
[0026] 75 parts of polyurethane resin, 8 parts of styrene-butadiene-styrene block copolymer, 3 parts of dioctyl phthalate, 40 parts of filler, 6 parts of hydroxypropyl acrylate, 6 parts of flame retardant, γ- 7 parts of aminopropyltriethoxysilane, 2 parts of polyethylene wax, and 2 parts of resorcinol monobenzoate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 12:1.
[0027] The preparation method of flame retardant is:
[0028] In octane, add nano-scale magnesium aluminum hydrotalcite and polyaspartic acid and stir to mix, then raise the temperature to 80°C, then add titanate and stir for 5 hours, cool down to 55°C, then add diethyl chlorophosphite and calcium carbonate Reaction 6h, you can. The mass ratio of nanoscale magnesium aluminum hydrotalcite to polyaspartic acid is 35:1, the...
Embodiment 2
[0030] A flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:
[0031] 65 parts of polyurethane resin, 6 parts of styrene-butadiene-styrene block copolymer, 5 parts of dioctyl phthalate, 50 parts of filler, 2 parts of hydroxypropyl acrylate, 4 parts of flame retardant, γ- 1 part of aminopropyl triethoxysilane, 1 part of polyethylene wax and 1 part of resorcinol monobenzoate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 9:1. The crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.
[0032] The preparation method of flame retardant is:
[0033] In cyclohexane, add nano-sized magnesium aluminum hydrotalcite and polyaspartic acid to stir and mix, then raise the temperature to 70°C, then add titanate and stir for 6 hours, cool down to 50°C, then add diethyl chlorophosphite and carbonic acid Calcium reaction 8h, you can. T...
Embodiment 3
[0035] A flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:
[0036] 85 parts of polyurethane resin, 12 parts of styrene-butadiene-styrene block copolymer, 1 part of dioctyl phthalate, 30 parts of filler, 7 parts of hydroxypropyl acrylate, 7 parts of flame retardant, γ- 10 parts of (methacryloyloxy)propyl trimethoxy silicon, 3 parts of polyethylene wax and 3 parts of resorcinol monobenzoate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 10:1. The crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.
[0037] The preparation method of flame retardant is:
[0038] In acetone, add nano-sized magnesium aluminum hydrotalcite and polyaspartic acid to stir and mix, then raise the temperature to 90°C, then add titanate and stir for 3 hours, cool down to 60°C, then add diethyl chlorophosphite and calcium carbonate to react 4 h...
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