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

Inactive Publication Date: 2009-08-19
HONGBAOLI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the synthesis method of the above-mentioned flame-retardant polyol is complicated, the cost is high, and the application is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to a structural type flame retardant polylol prepared by castor oil and the application thereof in urethane foam plastics. The structural type flame retardant polylol is characterized by being prepared by the method: the castor oil and low molecular alcohol have alcoholysis reaction under the condition that catalyst exists and then are added with bromine for bromination reaction, so that brominated castor oil polylol is obtained, wherein, the hydroxyl value is 100-600mgKOH/g, the iodine value is 1-20, the acid value is 0.1-20.0mgKOH/g, and the content of bromine in the product is 10-35wt%. The invention has the advantages of being lower in cost and simple in technique, obviously improving the flame retardance of rigid polyurethane foam as well as dropping no liquid, keeping the shape and being low in smoke density when in combustion, etc.

Description

Technical field [0001] The invention relates to a structured flame-retardant castor oil-based polyol and its application in polyurethane foam. More specifically, it utilizes the double bond in the castor oil molecule itself to form a compound with good flame-retardant properties through addition of bromine. Castor oil-based polyol, and used as a polyol component in polyurethane foam. Background technique [0002] Polyurethane is a kind of high polymer with urethane group (-NHCOO-) in the molecular chain. With the different raw materials, auxiliaries and process conditions during synthesis, products with different properties can be synthesized, such as foam, rubber, coatings, adhesives, elastic fibers, etc. [0003] In the past 20 years, my country's polyurethane industry has developed rapidly. Because the product has very low thermal conductivity and water vapor permeability, light weight, high specific strength, and it has strong adhesion to paper, metal, wood, cement board, bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/10C08G18/36C08J9/12
Inventor 罗振扬何明史以俊张银萍邢益辉孔德森
Owner HONGBAOLI GRP CO LTD
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