A kind of open-cell polyurethane high resilience foam composition and preparation method of foam
A technology of polyurethane and high resilience, applied in the field of polyurethane, can solve the problems of small amount of polysiloxane, difficulty in uniform and stable dispersion, high viscosity of polyether, etc., achieve good mechanical properties and flame retardant properties, reasonable formula, good The effect of porosity
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Embodiment 1
[0030] (1) Weigh 100g of octamethylcyclotetrasiloxane into a three-necked flask equipped with a thermometer and a condensing reflux device, raise the temperature to 60°C, add 3.0g of concentrated sulfuric acid, stir for 30min, and then add 12.1g of tetramethylcyclotetrasiloxane Hydrogen disiloxane, stirred and reacted at 60°C for 5h, after the reaction was completed, cooled to room temperature, neutralized the reaction liquid with sodium bicarbonate until neutral, washed with water, filtered, and removed small molecules by rotary evaporation at 130°C with a rotary evaporator The by-product was rotary evaporated for 4 hours and filtered under reduced pressure to obtain a hydrogen-terminated polydimethylsiloxane with a number average molecular weight of 1200.
[0031] (2) Weigh 50g of the hydrogen-terminated polydimethylsiloxane obtained in step (1) and 4.7g of allylamine into the reactor, raise the temperature to 50°C, and add 0.001g of H 2 PtCl 6 Catalyst, reacted for 4h, and...
Embodiment 2
[0034] (1) Weigh 100g of octamethylcyclotetrasiloxane into a three-neck flask equipped with a thermometer and a condensation reflux device, raise the temperature to 60°C, then add 3.0g of concentrated sulfuric acid, stir for 30min, and then add 7.0g of tetramethylcyclotetrasiloxane Dihydrodisiloxane, stirred and reacted at 60°C for 5h, after the reaction was completed, cooled to room temperature, neutralized the reaction liquid with sodium bicarbonate until neutral, washed with water, filtered, and removed small particles by rotary evaporation at 130°C with a rotary evaporator Molecular by-products were evaporated for 4 hours and filtered under reduced pressure to obtain a hydrogen-terminated polydimethylsiloxane with a number average molecular weight of 2000.
[0035] (2) Weigh 50g of the hydrogen-terminated polydimethylsiloxane obtained in step (1) and 2.8g of allylamine into the reactor, raise the temperature to 50°C, and add 0.001g of H 2 PtCl 6Catalyst, reacted for 4h to...
Embodiment 3
[0038] (1) Weigh 100g of octamethylcyclotetrasiloxane into a three-necked flask equipped with a thermometer and a condensation reflux device, raise the temperature to 60°C, add 3.0g of concentrated sulfuric acid, stir for 30min, and then add 20.0g of tetramethylcyclotetrasiloxane Hydrogen disiloxane, stirred and reacted at 60°C for 5h, after the reaction was completed, cooled to room temperature, neutralized the reaction liquid with sodium bicarbonate until neutral, washed with water, filtered, and removed small molecules by rotary evaporation at 130°C with a rotary evaporator The by-product was rotary evaporated for 4 hours and filtered under reduced pressure to obtain a hydrogen-terminated polydimethylsiloxane with a number average molecular weight of 800.
[0039] (2) Weigh 50g of the hydrogen-terminated polydimethylsiloxane obtained in step (1) and 7.2g of allylamine into the reactor, raise the temperature to 50°C, and add 0.001g of H 2 PtCl 6 Catalyst, reacted for 4h to ...
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Abstract
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