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Castor oil polyester polyol as well as synthetic method and application thereof

A technology of polyester polyol and synthesis method, which is applied in the field of synthesis of castor oil polyester polyol, can solve the problems that the mechanical properties cannot meet the requirements, etc., and achieve the effects of excellent hydrolysis resistance, excellent solvent resistance and high bonding strength

Active Publication Date: 2016-05-18
ZHEJIANG HUAFON NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when using castor oil polyether polyol as a single polyol raw material to make polyurethane foam, its mechanical properties cannot meet the requirements.

Method used

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  • Castor oil polyester polyol as well as synthetic method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 50kg of castor oil and 6.64kg of ethylene glycol are added to a reactor with a stirring and reflux device, 0.05kg of lithium hydroxide is added and the temperature is raised to 210°C for 3h, and the temperature is lowered to 100°C to obtain castor Sesame oil alcoholylate;

[0026] (2) Add 20.8kg of adipic acid, under the protection of nitrogen atmosphere, heat up to 145°C for 2h, then heat up to 200°C for 3h, react under reduced pressure in vacuum, measure the hydroxyl value of the reaction product to 28KOHmg / g, acid value The temperature was 1.8KOHmg / g, and the temperature was lowered to obtain castor oil polyester polyol P1.

Embodiment 2

[0028] (1) Add 50kg of castor oil and 9.95kg of ethylene glycol into a reaction kettle with a stirring and reflux device, add 0.25kg of lithium hydroxide and raise the temperature to 230°C for 2 hours, take a small amount of sample and add absolute ethanol to dissolve, If a clear and transparent solution is obtained, the temperature can be lowered to 120°C to obtain castor oil alcoholylate;

[0029] (2) Add 25.5kg of adipic acid, slowly raise the temperature to 190°C for 1h under the protection of nitrogen atmosphere, then slowly raise the temperature to 220°C for 2h and then carry out vacuum decompression reaction, measure the hydroxyl value of the reaction product to 56KOHmg / g , acid value of 1.7KOHmg / g, cooling to obtain castor oil polyester polyol P2.

Embodiment 3

[0031] (1) Add 50kg of castor oil and 8.00kg of ethylene glycol into a reaction kettle with a stirring and reflux device, add 0.15kg of lithium hydroxide and raise the temperature to 220°C for 2 hours, take a small amount of sample and add absolute ethanol to dissolve, If a clear and transparent solution is obtained, the temperature can be lowered to 110°C to obtain castor oil alcoholylate;

[0032] (2) Add 22.9kg of adipic acid, slowly raise the temperature to 170°C for 1h under the protection of nitrogen atmosphere, then slowly raise the temperature to 210°C for 2h, then carry out the vacuum decompression reaction, and measure the hydroxyl value of the reaction product to be 37KOHmg / g , acid value of 1.8KOHmg / g, cooling to obtain castor oil polyester polyol P3.

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PUM

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Abstract

The invention discloses castor oil polyester polyol as well as a synthetic method and an application thereof. The synthetic method comprises following steps: (1), castor oil and micromolecular diol react under catalysis of a catalyst, and a castor oil alcoholysis liquid is obtained; (2), micromolecular dicarboxylic acid is added and reacts under the protection of nitrogen atmosphere; (3), a vacuum decompression reaction is performed, and the castor oil polyester polyol can be obtained. The synthesized castor oil polyester polyol can be used for preparing polyurethane foaming gel; the castor oil after alcoholysis reacts with the micromolecular dibasic acid, the synthesized castor oil polyester polyol with a number-average molecular weight in a range from 2,000 to 4,000 is prepared, and then the polyurethane foaming gel is prepared and has the characteristics of high bonding strength, excellent hydrolysis resistance, excellent solvent resistance and the like.

Description

technical field [0001] The invention relates to a synthesis method of castor oil polyester polyol and its application in polyurethane foam. Background technique [0002] Polyurethane foam is a special moisture-curing rigid polyurethane foam system. Polyurethane, catalyst, foaming agent, etc. are filled in a pressure-resistant aerosol tank. When the material is sprayed from the tank into holes or gaps, it will expand rapidly and react with moisture in the air or on the substrate to cure. [0003] The polyurethane foam rubber has the advantages of simple use process, convenient storage and transportation, high bonding strength, toughness similar to rubber after curing, high strength similar to plastic, and good low temperature resistance, oil resistance, water resistance and chemical resistance. Corrosion, impact resistance, ozone resistance, vibration resistance, good electrical insulation and other characteristics. [0004] The two main raw materials for the production of ...

Claims

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Application Information

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IPC IPC(8): C08G63/49C08G18/48
CPCC08G18/68C08G63/48
Inventor 汪忠敏赵叶宝潘超凡陈余国何永张存芳
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD