Structure type flame-proof polyol prepared with ricinus oil and uses in polyurethane foam plastics
A castor oil and structural technology is applied to castor oil-based polyols and polyol components in the application field of polyurethane foam, can solve the problems of high cost, limitation, complicated synthesis method of flame retardant polyols, etc., and achieves low cost, The effect of low smoke density and improved flame retardant performance
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Embodiment 1
[0040] Example 1: Put 300 grams of castor oil into the reactor, and carry out alcoholysis reaction with 55 grams of glycerol, the catalyst is 1g sodium hydroxide, the reaction temperature is 160° C., and the reaction time is 5 hours. Then the temperature was controlled at about -10°C, and then 200 g of the methylene chloride solution containing 125 g of bromine was placed in the dropping funnel and added dropwise. After the solution was added, the reaction was continued for 6 hours to complete the reaction. The dichloromethane was then distilled at 60°C for 30 minutes. The obtained product has an iodine value of 5, an acid value of 10 mgKOH / g, a hydroxyl value of 360 mgKOH / g, and the content of bromine in the product is 25 wt%.
[0041] The spray-type polyurethane rigid foam can be prepared according to the following formula, which can be used for insulation construction such as walls, roofs or cold storage.
[0042] Raw material mass fraction
[0043] Example 1 Polyol 40
[0044] H...
Embodiment 2
[0063] Example 2: Put 600 g of castor oil into a reactor, and perform alcoholysis reaction with 170 g of pentaerythritol, 3 g of tetraisopropyl titanate as a catalyst, a reaction temperature of 210° C., and a reaction time of 10 hours. Then, the temperature is controlled at about 0°C, and 200 grams of bromine are placed in the dropping funnel and added dropwise. After the bromine is added, the reaction is completed for 1 hour. The obtained product has an iodine value of 5, an acid value of 1 mgKOH / g, a hydroxyl value of 460 mgKOH / g, and the content of bromine in the product is 20 wt%.
[0064] The flame-retardant polyurethane rigid foam used for building energy-saving sandwich panels can be prepared according to the following formula.
[0065] Raw material mass fraction
[0066] Example 2 Polyol 60
[0067] H4110-10
[0068] H635 30
[0069] Foam leveling agent B8462 2.0
[0070] Catalyst DMCHA 2.0
[0071] Catalyst Polycat 41 0.2
[0072] Water 1.5
[0073] HCFC-141b 18
[0074] ...
Embodiment 3
[0086] Example 3: Put 600 grams of castor oil into a reactor, and perform alcoholysis reaction with 300 g of trihydroxymethyl propane, a catalyst of 3.5 g of diethylamine, a reaction temperature of 230° C., and a reaction time of 15 hours. Then control the temperature at about 30℃, place 250g of carbon tetrachloride solution containing 150g of bromine in the dropping funnel and add dropwise. After the solution is added, react for 1 hour, and then distill at 80℃ for 60 minutes. Remove carbon tetrachloride in minutes. The obtained product has an iodine value of 10, an acid value of 0.5 mgKOH / g, a hydroxyl value of 480 mgKOH / g, and the content of bromine in the product is 15 wt%.
[0087] The following formula can be used for the preparation of spray polyurethane rigid foam.
[0088] Raw material mass fraction
[0089] Example 3 Polyol 100
[0090] Foam leveling agent AK 8805 2.0
[0091] Catalyst Dabco A-33 1.0
[0092] Catalyst DMCHA 2.0
[0093] Water 1.5
[0094] HFC-245fa 25
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