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Mixed acid type polyester polyol and preparation method thereof

A technology of polyester polyol and mixed acid, applied in the field of polyester polyol, can solve the problems of excess performance, dark color, poor performance and quality of polyurethane rigid foam products, etc., to improve compressive strength and dimensional stability, preparation Simple method and post-processing, and the effect of increasing the stability of miscibility

Inactive Publication Date: 2015-04-08
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although aliphatic polyester polyols have excellent performance when applied to polyurethane elastomers, the relative cost is relatively high, especially in industries that do not require high performance of products, there is a problem of excess performance
The addition of aromatic polyester polyols to rigid polyurethane foam can improve the toughness, heat preservation, flame retardancy, oil resistance and wear resistance of the product, but there are problems such as poor miscibility with the composite material and insufficient stability
In addition, many aromatic polyester polyols on the market use low-quality aromatic dibasic acids and recycled alcohols (diol production waste liquid, solar silicon chip cutting fluid, etc.) to synthesize aromatic polyester polyols. The color is dark and transparent, and the product specifications are uneven. , has a bad influence on the performance and quality of polyurethane rigid foam products

Method used

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  • Mixed acid type polyester polyol and preparation method thereof
  • Mixed acid type polyester polyol and preparation method thereof
  • Mixed acid type polyester polyol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 17 parts of terephthalic acid, 46 parts of adipic acid, 15 parts of ethylene glycol and 22 parts of 1,4-butanediol into the reactor equipped with a thermometer, oil-water separator and stirrer, and start charging before heating. Nitrogen protection for 10min. Heat to 225°C at a heating rate of 20°C / h, control the top temperature at 95±5°C, start vacuuming when the water output reaches 85% of the theoretical water output, control the vacuum degree to less than 0.096MPa, add 0.5 parts of titanic acid after 1h Tetrabutyl ester is subjected to polycondensation reaction, and when the acid value is 0.6 mgKOH / g, the reaction is stopped to obtain the product.

[0030] The obtained polyester polyol index of embodiment 1 is as follows: color<30#, acid value (mgKOH / g): 0.6, hydroxyl value (mgKOH / g): 56, water content is 0.03%, viscosity (75 ℃, cP): 680.

[0031] Apply the polyester polyol obtained in Example 1 to polyurethane elastomers, synthesize a prepolymer with an NCO c...

Embodiment 2

[0036] Add 38 parts of terephthalic acid, 7 parts of phthalic anhydride, 45 parts of diethylene glycol and 10 parts of glycerin into the reactor equipped with a thermometer, oil-water separator and stirrer, and start filling nitrogen for 10 minutes before heating. Heat to 220°C at a heating rate of 20°C / h, control the top temperature at 90±5°C, start vacuuming when the water output reaches 83% of the theoretical water output, control the vacuum degree to less than 0.096MPa, add 1 part of titanium after 1.2h Acid tetrabutyl ester and carry out polycondensation reaction, when the acid value is 1.0mg KOH / g, stop reaction, obtain product.

[0037] The obtained polyester polyol index of embodiment 2 is as follows: color<60#, acid value (mgKOH / g) is 1, hydroxyl value (mgKOH / g): 350, water content is 0.02%, viscosity (75 ℃, cP): 480.

[0038] The polyester polyol obtained in Example 2 is applied to polyurethane rigid foam, and the foam compressive strength (the pressure value when t...

Embodiment 3

[0043] Add 11 parts of terephthalic acid, 29 parts of phthalic anhydride, 45 parts of diethylene glycol and 15 parts of triethylene glycol into the reactor equipped with a thermometer, oil-water separator and stirrer, and start filling nitrogen protection for 12 minutes before heating. Heat to 230°C at a heating rate of 20°C / h, control the top temperature at 95±5°C, start vacuuming when the water output reaches 85% of the theoretical water output, control the vacuum degree to less than 0.096MPa, add 1 part of octanoic acid after 0.8h stannous and carry out polycondensation reaction, when the acid value is 0.8mgKOH / g, stop the reaction to obtain the product.

[0044] The obtained polyester polyol index of embodiment 3 is as follows: color<60#, acid value (mgKOH / g): 0.8, hydroxyl value (mgKOH / g): 240, water content is 0.02%, viscosity (75 ℃, cP): 210.

[0045] Apply the polyester polyol obtained in Example 3 to rigid polyurethane foam, add 30 parts of cyclopentane or 50 parts o...

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Abstract

The invention relates to a polyester polyol, and particularly relates to a mixed acid type polyester polyol and a preparation method thereof. The mixed acid type polyester polyol is prepared from mixed acids and mixed alcohols through polymerization reaction under the action of a catalyst; the mixed acids are two or more of adipic acid, terephthalic acid, phthalic acid, isophthalic acid or phthalic anhydride; and the mixed alcohols are two or more of ethylene glycol, propylene glycol, 1,4-butanediol, pentanediol, glycerol, diethylene glycol, triethylene glycol, dipropylene glycol, polyethylene glycol, trimethylolpropane, pentaerythritol or sorbitol. According to the mixed acid type polyester polyol disclosed by the invention, the rigidity of an elastomer product is increased; the color of a composition is not deepened when the mixed acid type polyester polyol is applied to rigid polyurethane foam; the intersolubility stability with the composition is increased; the compressive strength and the dimensional stability of the polyurethane foam are improved; and the preparation method disclosed by the invention is simple in posttreatment and suitable for industrialized production.

Description

technical field [0001] The invention relates to a polyester polyol, in particular to a mixed acid type polyester polyol and a preparation method thereof. Background technique [0002] The molecular structure of polyester polyurethane contains more ester bonds, so it has strong cohesive strength and adhesion, high mechanical strength and physical properties, and excellent wear resistance. Aliphatic polyester polyols are often used in the production of CPU, TPU, microporous polyurethane soles, PU leather resins, polyurethane adhesives, polyurethane inks and color pastes, fabric coatings, etc. Commonly used aromatic polyester polyols are polyester polyols obtained by polymerizing phthalic anhydride or terephthalic acid with diols and triols. Polyurethane products have many excellent properties, which can improve the temperature resistance of foam, and have complete biodegradability, will not pollute the environment and save energy. [0003] Although aliphatic polyester polyol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/668C08G18/76C08G18/42C08G18/32C08J9/14C08G101/00
Inventor 陈海良李国鹏董良肖磊
Owner SHANDONG INOV POLYURETHANE
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