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Sodium ricinoleate organic modified sodium-based montmorillonite and application thereof in hard polyurethane

A technology of ricinoleic acid sodium salt and sodium-based montmorillonite, which is applied in the field of organically modified montmorillonite and polyurethane, and can solve the problems of increased layer spacing of modified montmorillonite and easy decomposition at high temperature. Achieve the effect of rich content, good dispersion and high thermal stability

Inactive Publication Date: 2012-07-25
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the interlayer spacing of modified montmorillonite in the prior art is limited and the problem of easy decomposition at high temperature, the present invention provides a kind of ricinoleic acid sodium salt organically modified sodium-based montmorillonite and its composition in rigid polyurethane application, expanding the layer spacing of montmorillonite, and the obtained modified montmorillonite has stable chemical properties; in addition, the active hydroxyl group in the castor oil-based sodium salt reacts with isocyanate to realize the secondary intercalation of montmorillonite and improve the organic montmorillonite. Compatibility between soil and polyurethane, thereby improving the mechanical properties, thermal stability and flame retardancy of composite materials

Method used

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  • Sodium ricinoleate organic modified sodium-based montmorillonite and application thereof in hard polyurethane
  • Sodium ricinoleate organic modified sodium-based montmorillonite and application thereof in hard polyurethane
  • Sodium ricinoleate organic modified sodium-based montmorillonite and application thereof in hard polyurethane

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1. Add sodium-based montmorillonite to the flask, configure 5%wt soil slurry solution, adjust pH to 5.5, emulsify at 50-60°C for 3h, add ricinoleic acid sodium salt 0.5CEC, stir at 50-60°C for 3h, 900~1000r / min, centrifuge while hot, wash with water until the pH of the supernatant is 7, dry, grind, and pass through a 200-mesh sieve to obtain organically modified montmorillonite of ricinoleic acid sodium salt. The modified montmorillonite layer spacing (d 001 ) is 1.38nm. Then, according to the preparation formula of rigid polyurethane foam in Table 1, the combined polyol was obtained, dispersed evenly by ultrasonic, then mixed with isocyanate and stirred at high speed for 20-30 s at a speed of 3000-3500 r / min, poured into the mold, and aged for 48 h.

Embodiment 2

[0023] Example 2. Add sodium-based montmorillonite to the flask, configure a 5%wt soil slurry solution, adjust the pH to 5.5, emulsify at 50-60°C for 3h, add ricinoleic acid sodium salt 1CEC, stir at 50-60°C for 3h, and rotate at 900°C ~1000r / min, centrifuge while hot, wash with water until the pH of the supernatant is 7, dry, grind, and pass through a 200-mesh sieve to obtain the organically modified montmorillonite of ricinoleic acid sodium salt, and the layer of the modified montmorillonite Spacing (d 001 ) is 4.58nm. Then, according to the preparation formula of rigid polyurethane foam in Table 1, the combined polyol was obtained, dispersed evenly by ultrasonic, then mixed with isocyanate and stirred at high speed for 20-30 s at a speed of 3000-3500 r / min, poured into the mold, and aged for 48 hours.

Embodiment 3

[0024] Example 3. Add sodium-based montmorillonite to the flask, prepare a 5%wt soil slurry solution, adjust the pH to 5.5, emulsify at 50-60°C for 3h, add ricinoleic acid sodium salt 2CEC, stir at 50-60°C for 3h, and rotate at 900°C ~1000r / min, centrifuge while hot, wash with water until the pH of the supernatant is 7, dry, grind, and pass through a 200-mesh sieve to obtain the organically modified montmorillonite of ricinoleic acid sodium salt, and the layer of the modified montmorillonite Spacing (d 001 ) is 4.63nm. Then, according to the preparation formula of rigid polyurethane foam in Table 1, the combined polyol was obtained, dispersed evenly by ultrasonic, then mixed with isocyanate and stirred at high speed for 20-30 s at a speed of 3000-3500 r / min, poured into the mold, and aged for 48 h.

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Abstract

The invention discloses sodium ricinoleate organic modified sodium-based montmorillonite and an application thereof in hard polyurethane. The layer spacings of the sodium ricinoleate organic modified sodium-based montmorillonite are 4-5nm, and the sodium ricinoleate organic modified sodium-based montmorillonite structure contains an active hydroxy. According to the invention, sodium-based montmorillonite is modified with a common method by using sodium ricinoleate, such that the sodium ricinoleate organic modified sodium-based montmorillonite is obtained. According to the invention, a 3-8 wt% solution is prepared by using sodium-based montmorillonite; a pH value of the reaction liquid is regulated to 5.5-13; the reaction liquid is heated to a temperature for 50-80 DEG C, and is emulsified for 3-4h; 0.5-3CEC of obtained sodium ricinoleate is added to the reaction liquid, and the mixture is subject to a reaction for 3-4h, such that the sodium ricinoleate organic modified sodium-based montmorillonite is prepared. Polyurethane foamed plastic prepared with the sodium ricinoleate organic modified sodium-based montmorillonite has higher thermal stability, higher fire retardance, and higher mechanical properties.

Description

technical field [0001] The invention relates to an organically modified montmorillonite and its application in polyurethane, and mainly relates to the modification of sodium-based montmorillonite with ricinoleic acid sodium salt and its application in flame-retardant rigid polyurethane foam. Background technique [0002] Montmorillonite (MMT) is a kind of earthy mineral composed of negatively charged silicate sheets with nanometer thickness (about 1nm) on the surface relying on the electrostatic interaction between layers. The unit cell in its crystal structure is composed of two layers of silicon-oxygen tetrahedron sandwiching a layer of aluminum-oxygen octahedron, which belongs to the 2:1 type layered silicate. This special crystal structure endows montmorillonite with unique properties, such as large surface polarity, strong cation exchange capacity, and water content on the interlayer surface. [0003] Since the montmorillonite layer contains a large amount of inorganic...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/34C08L75/04C09C1/42C09C3/08
Inventor 周永红谢友利张猛胡立红
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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