Preparation method of polyester polyether polyol

A technology of polyester polyol and polyester polyether, which is applied in the field of chemical synthesis, can solve the problems of poor hydrolysis stability of foamed plastics, high polyester viscosity and high price, and achieves overcoming the problems of poor hydrolysis resistance stability, uniform and fine cells, and high production efficiency. low cost effect

Inactive Publication Date: 2013-03-13
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyether polyols have good hydrolysis stability and good compatibility with other additives in the formula, but the price of polymerized monomers such as ethylene oxide and propylene oxide used in the preparation of polyether polyols is relatively high, which leads to The price of polyether polyol is relatively high; polyester polyol is made by r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation process of polyester polyether polyol is as follows:

[0021] Add polyester polyol CF-8410 (Jiangsu Fusheng New Material Co., Ltd.) 600g, 233g sucrose, 15g dimethylamine, nitrogen replacement 3-5 times, add 80g propylene oxide, heat up and stir, react at 100-105°C, pressure 0.1-0.3MPa for about 2 hours. After that, the temperature was raised to 120-130°C, the pressure was controlled at 0.1-0.6MPa, and the remaining 587g of propylene oxide was divided into 5-8 batches and added successively, and then added to react for 1.5h until the reaction was complete. Then cool down to 80-95°C for vacuum dehydration for 1 hour, then filter and discharge.

[0022] The physical and chemical index of the polyester polyether polyol that makes is as follows:

[0023] Appearance: brown transparent

[0024] Hydroxyl value: 430mgKOH / g

[0025] Viscosity at 25°C: 6230mPa.S

[0026] The obtained polyester polyether polyol is used to prepare polyurethane foam for home appl...

Embodiment 2

[0032] The preparation process of polyester polyether polyol is as follows:

[0033] Add polyester polyol CF-6255 (Jiangsu Fusheng New Material Co., Ltd.) 650g, 250g sorbitol, 15g dimethylamine, nitrogen replacement 3-5 times, add 80g propylene oxide, heat up and stir, react at 100-105°C, pressure 0.1-0.3MPa for about 2 hours. Afterwards, the temperature was raised to 120-130°C, the pressure was controlled at 0.1-0.6 MPa, and the remaining 520 g of propylene oxide was divided into 5-8 batches and added successively, and then added to react for 1.5 hours until the reaction was complete. Then cool down to 80-95°C for vacuum dehydration for 1 hour, then filter and discharge.

[0034] The physical and chemical index of the polyester polyether polyol that makes is as follows:

[0035] Appearance: brown transparent

[0036] Hydroxyl value: 440mgKOH / g

[0037] Viscosity at 25°C: 7000mPa.S

[0038] The obtained polyester polyether polyol is used to prepare polyurethane foam for h...

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Abstract

The invention belongs to the technical field of chemical synthesis, and specifically relates to a preparation method of polyester polyether polyol for rigid foam. Polyester polyol and low molecular weight polyol are used as a mixed initiator, and polymerized with epoxy propane under the catalytic effect of amine at a temperature of 100-130 DEG and pressure of 0.1-0.6 MPa; the polyester polyol has degree of functionality of 2-3 and viscosity of 8000-15000 mPa.S at 25 DEG C; and the low molecular weight polyol has degree of functionality of 3-8 and molecular weight of 92-342. According to the invention, the initiator mainly employs polyester polyol to lower production costs; the product has higher foam strength, even and delicate abscess and low coefficient of heat conductivity; and the reaction products can be directly filtered and discharged after dehydration, without post-treatment process.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of polyester polyether polyol for hard foam. Background technique [0002] Rigid polyurethane foam refers to a foam that does not undergo significant deformation under a certain load condition, and cannot return to its original state after being deformed when the load is too large. It is an excellent thermal insulation material and structural material, widely used in refrigerators, cold storage, spraying, solar energy, thermal pipelines, construction and other fields. [0003] Polyols used in rigid polyurethane foams include polyether polyols, polyester polyols and other hydroxyl-containing compounds. Polyether polyol is an oligomer polyol synthesized by ring-opening homopolymerization and copolymerization reaction with epoxy compounds such as ethylene oxide and propylene oxide as polymerized monomers, and polyhydroxyl and amine compou...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/48
Inventor 刘军李晓芳王新莉王玉念以亭
Owner SHANDONG INOV NEW MATERIALS CO LTD
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