Current Location： Home > News > Chemical Knowledge > Properties, uses, upstream and downstream raw materials, storage methods of polyester polyols, and what are polyester polyols used?

[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods of polyester polyols, and what are polyester polyols used?

Read： 384 Time：1months ago Source：Ease of the world

Polyester polyol properties

Polyester polyols are a class of polymer compounds made from diols and dibasic acids or esters thereof by polycondensation. Their chemical structure determines their physical and chemical properties. Polyester polyols have excellent abrasion resistance, oxidation resistance and chemical resistance, and hardness and elasticity can be controlled by adjusting the composition thereof. Polyester polyols of different molecular weights and different functional groups can provide different viscosities, melting points and solubilities, which makes them widely applicable in many applications.

Polyester polyol use

Polyester polyols are widely used in many industrial fields, mainly for the production of polyurethane materials. Polyurethane foam is one of the most common application forms, covering two categories of rigid foam and flexible foam. The former is used for building insulation, refrigerators and freezers, and the latter is mainly used for furniture, mattresses and other comfort materials. Polyester polyols are also used in the production of coatings, adhesives and sealants, especially high-performance coatings, which are widely used in the automotive and marine industries due to their excellent weather resistance and corrosion resistance.

Polyester polyol upstream raw materials

The main raw materials for the production of polyester polyols include diols and dibasic acids. Common diols are ethylene glycol, propylene glycol and butylene glycol, while common dibasic acids include terephthalic acid, adipic acid and maleic anhydride. The reaction of ethylene glycol and terephthalic acid produces polyethylene terephthalate (PET), a common polyester polyol. The choice of raw materials not only affects the performance of the product, but also affects the production process and cost. Therefore, the quality and supply stability of raw materials are important factors to ensure the production of polyester polyols.

Polyester polyol downstream products

The downstream products of polyester polyols are mainly various polyurethane products. Rigid polyurethane foam is widely used in building insulation materials, with excellent thermal insulation properties; flexible polyurethane foam is used in furniture and car seats, providing good comfort and durability. Polyester polyols are also used to produce polyurethane elastomers. This material has high elasticity and wear resistance, and is suitable for shoe soles, tires and industrial rollers. The diversified properties of polyester polyols make their downstream products have important applications in industry, daily life and high-tech fields.

Polyester polyol storage method

Storage requirements for polyester polyols are stringent to ensure that their stability and performance are not compromised. In general, polyester polyols should be stored in a sealed container, protected from moisture and oxygen in the air to avoid hydrolysis and oxidation reactions. The storage environment should be kept cool and dry, and away from fire sources and strong oxidants. During long-term storage, the viscosity, acid value and other indicators of the product should be checked regularly to ensure that its quality remains unchanged. For some special varieties, it is also necessary to store under nitrogen protection to further prevent oxidation and degradation.

Polyester Polyol Market Prospects

With the increasing global demand for energy-saving and environmentally friendly materials, the polyester polyol market has a bright future. Especially in the fields of construction, automobile and electronic appliances, polyester polyol products are more and more popular because of their excellent performance and environmental friendliness. In the future, with the continuous advancement of technology, the development of new catalysts and processes will further reduce production costs, improve product performance, and broaden application areas. The introduction of bio-based raw materials will make polyester polyols more environmentally friendly and in line with the trend of sustainable development.

Conclusion

As an important chemical product, polyester polyol has unique physical and chemical properties and a wide range of applications. The choice of upstream raw materials and the diversity of downstream products make the industry chain have strong market adaptability and development potential. Through reasonable storage methods and continuous technological innovation, polyester polyols will continue to play an important role in many industries in the future, promoting the development and progress of related industries.

Previous： What are the factors affecting the price of polyester resin? Detailed analysis, polyester resin prices

Next： What are the factors affecting the price of polyester polyols? Detailed analysis, types of polyester polyols

News Categories