Polyether

Rigid polyether refers to materials that are hard in texture when formed into products; it is the main component of rigid polyurethane ethers. Its synthesis involves the polymerization of sugars, sorbitol, low-functionality alcohols, PO, etc., under certain temperatures and pressures. Polyether used in rigid polyurethane foam is one of the main raw materials for such foam; it is also known as the white component. Together with polymeric MDI, it constitutes the so-called black and white components. Its main uses are in building insulation and cooling, as well as in applications related to solar energy, water heaters, cold storage facilities, temperature-controlled storage areas, beer kegs, and refrigeration – in short, in any situation where insulation or cooling is required. Polyurethane soft foam plastics: The polyurethane soft foam product range includes block-shaped, continuous, and sponge types, as well as high-rebound foam (HR), self-crusting foam, slow-rebound foam, microporous foam, and semi-rigid energy-absorbing foam. These foams still account for around 50% of the total volume of polyurethane products. It is a product category whose applications are expanding steadily, covering various sectors of the national economy such as home appliances, automobiles, home decoration, furniture, trains, ships, and aerospace. Since its introduction in the 1950s, and especially since the beginning of the 21st century, polyurethane soft foams have seen significant progress in terms of technology, as well as in terms of the variety of products and their production volumes. Notable developments include environmentally friendly polyurethane soft foams, that is, green polyurethane products; polyurethane soft foams with low VOC levels; foams with low mist generation; fully water-based polyurethane soft foams; fully MDI-based foam series; flame-retardant, low-smoke, fully MDI-based foams; new types of additives such as reactive high-molecular-weight catalysts, stabilizers, flame retardants, and anti-aging agents; polyols with low unsaturation and low monolcohol content; polyurethane soft foams with excellent properties due to ultra-low density; foams with low resonance frequencies and low conductivity; special polyols such as polycarbonate diols, polyε-caprolactone polyols, polybutadiene glycols, and poly**furan; as well as technologies such as liquid CO2 foaming and negative pressure foaming. In short, the emergence of new products and technologies has contributed to further development of polyurethane soft foams.

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