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Structure type flame-proof ricinus oil based polylol and uses in polyurethane foam

A technology of castor oil-based polyols, which is applied in the field of castor oil-based polyols and polyol components in polyurethane foam. It can solve problems such as limitations, high costs, and complex synthesis methods of flame-retardant polyols, and achieve low cost. , low smoke density, 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

[0031] Put 300 grams of castor oil into the reactor, then control the temperature at about -10°C, and then place 200 grams of dichloromethane solution containing 120 grams of bromine in the dropping funnel and add it drop by drop. , and then reacted for 6 hours to end the reaction. Dichloromethane was then distilled off at 60°C for 30 minutes. Then, 400 g of the brominated castor oil and 55 g of glycerol were subjected to a transesterification reaction, the catalyst sodium hydroxide was 1 g, the reaction temperature was 160° C., and the reaction time was 5 hours. The obtained product is 450g, the iodine value is 5, the acid value is 10mgKOH / g, the hydroxyl value is 320mgKOH / g, and the content of bromine in the product is 26wt%.

[0032] In the container, add brominated castor oil-based polyol, polyether polyol, foam stabilizer, water and various catalysts sequentially in the amount (parts by weight) determined by the following formula, and stir at high speed for 10 s. Add po...

Embodiment 2

[0042] Put 600 grams of castor oil into the reactor, then control the temperature at about 0°C, and then place 240 grams of bromine in the dropping funnel and add it drop by drop. After the addition of bromine is completed, react for another 3 hours. reaction. Then, 810 g of brominated castor oil and 170 g of pentaerythritol were subjected to a transesterification reaction with 3.5 g of catalyst sodium methylate, the reaction temperature was 210° C., and the reaction time was 10 hours. The obtained product is 960g, the iodine value is 10, the acid value is 1mgKOH / g, the hydroxyl value is 460mgKOH / g, and the content of bromine in the product is 24wt%.

[0043] Add brominated castor oil-based polyol, polyether polyol, surfactant, water and various catalysts in sequence according to the ratio specified in the formula, and stir at high speed for 10 seconds. Add polymethylene polyphenyl polyisocyanate and stir at high speed for 11s. Quickly pour the material into the mold coated ...

Embodiment 3

[0054] Put 600 grams of castor oil into the reactor, then control the temperature at about 20°C, and then place 250 grams of bromine in the dropping funnel and add it drop by drop. After the addition of bromine is completed, react for another 3 hours reaction. The obtained product has an iodine value of 8, an acid value of 0.1 mgKOH / g, a hydroxyl value of 150 mgKOH / g, and a content of bromine in the product of 35 wt%.

[0055] Add brominated castor oil-based polyol, polyether polyol, surfactant, water and various catalysts in sequence according to the ratio specified in the formula, and stir at high speed for 10 seconds. Add polymethylene polyphenyl polyisocyanate and stir at high speed for 11s. Quickly pour the material into the mold coated with release agent, and open the mold to obtain polyurethane rigid foam.

[0056] 30 parts of embodiment 3 polyols;

[0057] Polyol H 4110 50 parts;

[0058] Polyol H 635 20 parts

[0059] 20 copies of HCFC-141b;

[0060] 1 part of w...

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Abstract

The invention relates to a structural type flame retardant castor oil base polylol and the application thereof in urethane foam. The structural type flame retardant castor oil base polylol is brominated castor oil prepared by the reaction between the castor oil and bromine, or is obtained by ester exchange reaction between the brominated castor oil and low molecular alcohol. The rigid polyurethane foam prepared by adopting the two structural type flame retardant castor oil base polylols has the advantages of obviously improved flame retardance as well as dropping no liquid, keeping the shape and being low in smoke density when in combustion, etc. The invention can be used for producing the products such as polyurethane thermal insulating material, damping material, sealing material, etc.

Description

technical field [0001] The invention relates to a structural flame-retardant castor oil-based polyol and its application in polyurethane foam. More specifically, it uses the double bond in the castor oil molecule to add bromine to form a polyol with good flame-retardant performance. Castor oil based polyol and used as polyol component in polyurethane foam. Background technique [0002] Polyurethane is a kind of high polymer containing carbamate group (-NHCOO-) in its molecular chain. With the different raw materials, additives and process conditions during synthesis, products with different properties can be synthesized, such as foam plastics, 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, brick wall...

Claims

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Application Information

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IPC IPC(8): C11C3/10C08G18/36C08J9/12
Inventor 何明罗振扬张银萍史以俊邢益辉孔德森
Owner HONGBAOLI GRP CO LTD
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