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Sorbitol modified aromatic polyester polyol for hard foam and preparation method thereof

A technology of aromatic polyester and sorbitol, which is applied in the field of sorbitol-modified aromatic polyester polyol for hard foam and its preparation, can solve the problems of increased processing costs, easy shrinkage of products, and low functionality, and achieves Reduced consumption, low production cost, and improved heating efficiency

Active Publication Date: 2014-03-19
JIANGSU YINGTIAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the incorporation of ordinary low-functional aromatic polyester polyols can improve the fineness, heat preservation, flame retardancy, oil resistance and wear resistance of rigid polyurethane foam, the functionality is relatively low, and the product tends to shrink when the amount added is large
[0004] At present, the main liquid component of most solar silicon wafer cutting fluids is glycol. With the continuous development of solar photovoltaic industry and petrochemical industry, various polyol waste liquids will be continuously produced. However, careful distillation and purification work , not only consumes a lot of energy, but also greatly increases the processing cost

Method used

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  • Sorbitol modified aromatic polyester polyol for hard foam and preparation method thereof
  • Sorbitol modified aromatic polyester polyol for hard foam and preparation method thereof
  • Sorbitol modified aromatic polyester polyol for hard foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Sorbitol-modified aromatic polyester polyol for rigid foam, including the following components:

[0023]

[0024] The preparation method of the sorbitol-modified aromatic polyester polyol for hard foam is as follows: put the low-molecular polyol raw material, phthalic anhydride, trimellitic anhydride and catalyst into the polyester reaction kettle; 2 Protection, use high temperature and high pressure steam heating method, slowly increase the temperature to 225°C, and control the gas phase temperature below 98°C; when the water output reaches 85% of the theoretical water output, keep it warm for 1h; turn off the nitrogen, start vacuuming, and the vacuum degree ≤0.095MPa, keep the temperature at 217-223°C, stop the reaction when the acid value of the product is ≤2mg KOH / g, and the functionality is ≥3.1; cool down to below 80°C and press filter to get viscous transparent yellow-brown Aromatic polyester polyol (hydroxyl value 380mg KOH / g, acid value 1.7mg KOH / g, moisture...

Embodiment 2

[0026] Sorbitol-modified aromatic polyester polyol for rigid foam, including the following components:

[0027]

[0028]

[0029] Put low-molecular polyol raw materials, phthalic anhydride, trimellitic anhydride and catalysts into the polyester reactor; 2 Protection, use high temperature and high pressure steam heating method, slowly increase the temperature to 225°C, and control the gas phase temperature below 98°C; when the water output reaches 85% of the theoretical water output, keep it warm for 1h; turn off the nitrogen, start vacuuming, and the vacuum degree ≤0.095MPa, keep the temperature at 217~223°C, stop the reaction when the acid value of the product is ≤2mgKOH / g, and the functionality is ≥3.1; cool to below 80°C and filter the material to obtain a viscous transparent yellow-brown aroma Family polyester polyol (hydroxyl value 391mg KOH / g, acid value 1.9mg KOH / g, moisture 0.03%).

Embodiment 3

[0031] Sorbitol-modified aromatic polyester polyol for rigid foam, including the following components:

[0032]

[0033] Put low-molecular polyol raw materials, phthalic anhydride, trimellitic anhydride and catalysts into the polyester reactor; 2 Protection, use high temperature and high pressure steam heating method, slowly increase the temperature to 225°C, and control the gas phase temperature below 98°C; when the water output reaches 85% of the theoretical water output, keep it warm for 1h; turn off the nitrogen, start vacuuming, and the vacuum degree ≤0.095MPa, keep the temperature at 217~223°C, stop the reaction when the acid value of the product is ≤2mgKOH / g, and the functionality is ≥3.1; cool to below 80°C and filter the material to obtain a viscous transparent yellow-brown aroma Family polyester polyol (hydroxyl value 445mg KOH / g, acid value 1.8mg KOH / g, moisture 0.03%).

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Abstract

Sorbitol modified aromatic polyester polyol for hard foam includes the following components by the mass fraction: 18-23% of phthalic anhydride, 5-10% of trimellitic anhydride, 55-65% of a recycled solar silicon wafer cutting fluid, 10-15% of sorbitol, and 0.005-0.02% of a catalyst. A preparation method of the polyester polyol comprises the steps: putting the materials into a reaction kettle protected by N2; heating up, when the water output amount reaches 85% of a theoretical water output amount, and carrying out heat preservation for 1 h; vacuumizing, maintaining the temperature at 217-223 DEG C, and stopping the reaction when the product acid value is not more than 2 mg KOH / g and the functionality degree is not less than 3.1; and cooling to 80 DEG C or less, carrying out filter-pressing material discharge, and thus obtaining the aromatic polyester polyol. The aromatic polyester polyol has relatively high functionality degree, not only can reduce the thermal conductivity coefficient of products, but also improves the mechanical strength, temperature resistance and flame retardance of the products, and besides can achieve environmental-protection low-energy-consumption reutilization of waste alcohol.

Description

technical field [0001] The invention relates to the field of polyester polyol synthesis, in particular to a sorbitol-modified aromatic polyester polyol for rigid foam and a preparation method thereof. Background technique [0002] Aromatic polyester polyol is one of the important raw materials for the synthesis of polyurethane resin. Due to the existence of benzene ring and ester bond, it endows polyurethane foam with many excellent properties, such as toughness, flame retardancy, adhesion, chemical resistance, and oil resistance. resistance, heat resistance, wear resistance, etc. Due to the high emulsification performance of polyester, the cells of polyurethane foam are delicate, the thermal conductivity is low, and the water absorption rate of the foam is reduced to a low level, which can improve the temperature resistance of the foam and save energy. Polyester polyol is a compound with polybasic acid or anhydride reacted with polyol, and finally terminated with hydroxyl ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/127C08G63/85
Inventor 杨水清罗伟蒋文俊陈玉龙王荣华
Owner JIANGSU YINGTIAN CHEM
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