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Production method of polyester polyol

A technology of polyester polyol and production method, which is applied in the field of polyester polyol production, can solve problems such as lack of long-term stability of polyether polyol, and achieve the effects of low cost, improved functionality, and simple process operation

Active Publication Date: 2013-05-08
ZHANGJIAGANG NANGUANG CHEM
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Therefore, when producing low-density polyurethane foam, in order to prevent the separation of cyclopentane, the method of adding emulsifiers is used to increase the compatibility of cyclopentane, but many other factors can affect the compatibility of cyclopentane (such as water part content, polyester dosage, etc.), this combination of polyether polyols lacks long-term stability

Method used

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  • Production method of polyester polyol
  • Production method of polyester polyol

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Embodiment 7

[0034]Embodiment 7: basically the same as Example 1, the difference is: the natural oil is coconut oil, cottonseed oil, linseed oil, olive oil, palm oil, palm kernel oil, peanut oil, sunflower oil, through leaching and purifying Any of the natural oils.

Embodiment 8

[0035] Example 8: It is basically the same as Example 1, except that the esterification catalyst includes any of isopropyl titanate, butyl titanate, monobutyltin oxide (MBTO), calcium oxide, and zinc oxide. A sort of.

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Abstract

The invention discloses a production method of polyester polyol. According to the method, natural oil is modified by maleic anhydride and then reacts with small-molecule polyol, dicarboxylic acid or carboxylic ester to obtain a polyester polyol product with high cyclopentane solubility. According to the invention, the modified oil can be led into a polyester body relatively completely so as to improve the functionality of the whole product; the cost of the adopted raw materials is low, and the technology is easy to operate; and particularly in the process of producing low-density polyurethane foam, the solubility of the adopted cyclopentane in polyester polyol can be improved at least to 25%.

Description

technical field [0001] The invention relates to the production field of polyurethane foam, in particular to a production method of polyester polyol. Background technique [0002] Foam producers use aromatic polyester polyols with other ingredients to produce polyurethane foam. Other ingredients may include polyether polyols, silicone surfactants, various amine or metal catalysts and blowing agents. This type of blend, known as combination polyether polyol formulation is an important component for making polyurethane foam. The other important component is isocyanate. Yet another important ingredient is the blowing agent. Without blowing agents, it is impossible to make foams with low density and high strength-to-weight ratio. Suitable blowing agents currently on the market are hydrofluorocarbons, hydrocarbons, and carbon dioxide gas. [0003] Water reacts with isocyanate to form an unstable carbamic acid, which decomposes to form amine and carbon dioxide. The amine reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/676C08G63/78C08G18/68
Inventor 钟自勉冯向华
Owner ZHANGJIAGANG NANGUANG CHEM
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