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Production process and use of polyester polyol and its modifying material

A polyester polyol and production process technology, applied in the field of chemical raw material production, can solve the problems of not mentioning vegetable oil, unfavorable production efficiency, etc., and achieve the effects of good dimensional stability, good flame retardancy and cost reduction

Active Publication Date: 2004-04-07
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent does not mention a method to ensure that vegetable oil participates in the reaction, and there is a process of cooling down and heating up during the reaction, which is not conducive to improving production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of embodiment 1 polyester polyol A:

[0029] Add 7.50 kg of castor oil, 1.49 kg of glycerin and 1.40 g of tetrabutyl titanate into a reactor equipped with a stirrer, a thermometer, and a nitrogen inlet pipe, raise the temperature to 220-240°C under the protection of nitrogen, and keep the temperature for 4 hours. Promptly obtain alcoholyzed castor oil A;

[0030] 17.88 kilograms of phthalic anhydride, 25.61 kilograms of diethylene glycol, alcoholyzed castor oil A and 3 grams of tetrabutyl titanate were added to an 80-liter reaction kettle equipped with a stirrer, a thermometer, a nitrogen inlet pipe and a rectification tower, under nitrogen protection Heat up to 200-220°C, keep warm for reaction, distill 2.10 kg of water; then slowly depressurize, adjust the vacuum degree at 0.075-0.085Mpa, keep warm at 200-220°C until the acid value is qualified.

[0031] The acid value of the product is 1.2mgKOH / g, the viscosity is 3700mPa·s (25°C), and the hydroxyl v...

Embodiment 2

[0032] The preparation of embodiment 2 polyester polyol B:

[0033] Add 7.5 kg of castor oil, 1.65 kg of pentaerythritol and 1.4 g of tetrabutyl titanate into a reactor equipped with a stirrer, a thermometer, and a nitrogen inlet tube, and raise the temperature to 220-240°C under the protection of nitrogen, and keep the temperature for 4 hours. Promptly obtain alcoholyzed castor oil B;

[0034] 17.88 kilograms of phthalic anhydride, 25.61 kilograms of diethylene glycol, alcoholyzed castor oil B and 3 grams of tetrabutyl titanate were added to an 80-liter reaction kettle equipped with a stirrer, a thermometer, a nitrogen inlet pipe and a rectification tower, under nitrogen protection Heat up to 200-220°C, keep warm for reaction, distill 2.10 kg of water; then slowly depressurize, adjust the vacuum degree at 0.075-0.085Mpa, keep warm at 200-220°C until the acid value is qualified.

[0035] The acid value of the product is 1.3mgKOH / g, the viscosity is 3800mPa·s (25°C), and the h...

Embodiment 4

[0042] The preparation of embodiment 4 polyisocyanurate foam:

[0043] As shown in Table 2, the polyester polyol component, catalyst, and foam stabilizer were mixed according to the ratio shown in Table 2, and preheated to 26°C. Then the polyisocyanate component preheated to 26°C was added to the polyol mixing component according to the ratio in Table 2, stirred for 6 seconds, and poured into a wooden box to form a polyisocyanurate foam.

[0044] PIR 1

PIR 2

PIR 3

Polyester polyol A

100

90

Polyester polyol B

100

Polyether 4110

10

H2O

0.5

0.5

0.5

DC5098

2

2

2

TCPP

20

20

20

POLYCAT 5

1.2

1.2

1.2

DABCO TMR-2

2

2

2

DABCO TMR-3

0.4

0.4

0.4

HCFC-141b

40

40

40

PM 200

240

...

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Abstract

The present invention belongs to the field of chemical material production. Polyester polyol is prepared with aryl binary carboxylic anhydride, polyol and modifying material and through polycondensation, with the modifying material being alcoholized product of vegetable oil. The produced polyester polyol has low visicosity, high degree of functionality, and excellent compatibility with foaming agent, especially HCFC-141b; and may be used in produce hard foamed polyurethane material, sepecially PIR foam. It has few polyester added and thus has high fireproof performance and low cost.

Description

1. Technical field [0001] The invention relates to the production process and application of polyester polyol and its modified raw material, and belongs to the technical field of chemical raw material production. 2. Background technology [0002] As we all know, polyurethane rigid foam is formed by the reaction of polyol components and polyisocyanate components in the presence of blowing agents, catalysts, and foam stabilizers. The polyol may be polyether polyol, polyester polyol or a mixture thereof. The hydroxyl value of rigid foam polyether is generally 350-650mgKOH / g, and the functionality is usually between 3-8. If a polyether cannot meet the requirements of rigid foam performance during use, it is often necessary to rationally mix and use polyethers with different hydroxyl values ​​and functionalities to achieve the best foam performance. Techniques in this area are described in detail in books and periodicals. Generally speaking, increasing the functionality of pol...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G63/12
Inventor 张谦和李春兰韩怀强
Owner WANHUA CHEM GRP CO LTD
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