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Synthesis process of polymer polyester polyol

A technology of polyester polyol and synthesis process, applied in the field of synthesis technology of polymer polyester polyol, can solve the problems of small molecular weight of dispersant, decreased tear strength of products, poor activity of tertiary carbon double bonds, etc., and achieve less filter residues. The effect of high content, high tensile strength and high tear strength

Active Publication Date: 2020-05-05
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with polymer polyether polyol, polymer polyester polyol has the characteristics of high viscosity and poor solvency
Moreover, the preparation of dispersants is difficult, and the poor effect also restricts the development of polymer polyester polyols.
For example, in EP0250351 and CN1683425A, maleic anhydride or fumaric acid has been used as the donor of unsaturated bonds in the dispersant, but due to the poor activity of this tertiary carbon double bond, the dispersion effect in the polymerization reaction is poor, and the polymer polymerization Using too much dispersant in ester polyol will lead to a decrease in the tensile and tear properties of the product
And in CN1995083A, the dispersant is prepared by unsaturated double bond monoalcohol, polyisocyanate and general polyester polyol. This scheme solves the carbon-carbon double bond activity problem, but the dispersant molecular weight is too small, which brings the product tearing. Disadvantages of decreased crack strength

Method used

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  • Synthesis process of polymer polyester polyol
  • Synthesis process of polymer polyester polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of dispersant

[0027] The temperature is controlled at 25°C, the molecular weight is 4000g / mol, the polymerized monomer is propylene oxide, and the polyether polyol with a functionality of 2 (DL-4000 produced by Bluestar Dongda) is 4000g, TDI 350g, TMI 202g, molecular weight 2000g / mol , Polymerized monomer ethylene glycol and adipic acid, 4000g of polyester polyol with a functionality of 2, mix well, slowly add 0.24g of stannous octoate dropwise, under the protection of nitrogen atmosphere, stir slowly and heat up at 70°C for 3h into, spare.

[0028] (2) Synthesis of Polymer Polyester Polyol

[0029] The synthesis of polymer polyester polyol is to control the temperature at 120°C and the pressure between 0.05-0.45MPa, add the top material dropwise to the bottom material, and the time for adding the top material is 2 hours. React for 1 hour under the pressure of 0.4MPa, then remove the pressure in the reactor, remove the volatile matter in a vacuum, an...

Embodiment 2

[0031] (1) Preparation of dispersant

[0032] The temperature is controlled at 25°C, the molecular weight is 4000g / mol, the polymerized monomer is propylene oxide, and the polyether polyol with a functionality of 2 (DL-4000 produced by Bluestar Dongda) is 4000g, TDI 350g, TMI 202g, molecular weight 2000g / mol , Polymerized monomer ethylene glycol, propylene glycol and adipic acid, 4000g of polyester polyol with a functionality of 2, mixed uniformly, slowly added dropwise catalyst dibutyltin dilaurate 0.3g, under the protection of nitrogen atmosphere, stirred and slowly raised the temperature at 70 ℃ under the conditions of reaction for 3h made, spare.

[0033] (2) Synthesis of Polymer Polyester Polyol

[0034] The synthesis of polymer polyester polyol is to control the temperature at 120°C and the pressure between 0.05-0.4MPa, add the top material dropwise to the bottom material, and the time for adding the top material is 2.1 hours. React for 1 hour under the pressure of 0.4...

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Abstract

The invention belongs to the technical field of synthesis of polymer polyester polyol, and particularly relates to a synthesis process of a polymer polyester polyol. The preparation method comprises the following steps: synthesizing a polyester polyol grafted dispersant, and carrying out in-situ polymerization in a basic polyester polyol by using the dispersant to prepare the polymer polyester polyol. The polymer polyester polyol prepared by adopting the synthesis process has the minimum filter residue content, and a polyester type microporous foam product prepared by adopting the polymer polyester polyol has the highest tearing strength and tensile strength and high bearing performance.

Description

technical field [0001] The invention belongs to the technical field of synthesis of polymer polyester polyols, and in particular relates to a synthesis process of polymer polyester polyols. Background technique [0002] Polymer polyester polyol is mostly used in polyurethane product foam and other foaming or pouring products. It is formed by dispersing polymers and copolymers of ethylenically unsaturated monomers in polyester polyol through in-situ polymerization. A uniform and stable mixture, such as CN10677059A and CN1160061C graft vinyl monomers on organic molecules to form graft polymers to obtain polyester polymer polyols. When the above-mentioned polymer polyol is used for polyurethane molding, it can greatly enhance the open cell property and uniformity of the foam, increase the load-bearing performance of the material, and increase the tensile strength. [0003] The synthesis mechanism of polymer polyester polyol is similar to that of polymer polyether polyol, and m...

Claims

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Application Information

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IPC IPC(8): C08F283/02C08F212/10C08F220/44C08F212/08C08G18/63
CPCC08F283/02C08G18/631C08G18/636C08F212/10C08F220/44C08F212/08
Inventor 韩宏伟高铭王同同
Owner SHANDONG BLUSR DONGDA CHEM
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