In organic chemistry, a polyol is an organic compound containing multiple hydroxyl groups (−OH). The term "polyol" can have slightly different meanings depending on whether it is used in food science or polymer chemistry. Polyols containing two, three and four hydroxyl groups are diols, [1] triols, [2] and tetrols, [3][4] respectively.

Polyols are the main reaction partners of polyisocyanates and their chemical composition and molecular mass determine the properties of the resulting PURs. About 75% of all polyols are polyether polyols, and about 25% are polyesters and other polyols.

Polyether-based polyurethanes exhibit enhanced hydrolytic stability and excellent resistance to weak acids and bases compared to polyester-based polyurethanes. Polyether polyurethane can be divided into soft foam polyether, rigid foam polyether and elastomer with polyether according to performance of polyether products.

Polyether polyols, polyester polyols, polycarbonates, isocyanate, chain extenders, and catalysts are required for the synthesis of different forms of polyurethane hydrogels. Components of...

An official website of the United States government Here is how you knowPolyether Polyol chemical information summary.

2024年9月12日 · Explore the fundamental concepts of polyether polyols, including their chemical structure, production methods, and diverse applications in industries such as foam, coatings, and elastomers.

Polyether polyols are the class of polymers formed from the exothermic reaction of ethylene oxide (oxirane), 1,2-propylene oxide (methyloxirane), or 1,2-butylene oxide (ethyloxirane). Other materials could be considered (i.e., epichlorohydrin), but these monomers are the largest volume of this class and of the most use in polyurethane chemistry.

2024年3月14日 · The core of the polyether polyol production process is the polymerization reaction. In this step, epoxide monomers (EO, PO, or a mixture of both) are added to the initiator in the presence of a catalyst. Catalysts used in this process can be alkaline substances, such as potassium hydroxide, or double metal cyanide complexes (DMC catalysts).

2004年3月1日 · The structure and properties of polyether polyols are characterized by GPC, FT-IR, and 13 C NMR. The results show that the polyether polyols catalyzed by these Fe–Zn DMC catalysts are of low unsaturation, high molecular weight, narrow molecular distribution compared with the polyether polyols catalyzed by traditional KOH catalysts.

2024年6月12日 · POLYETHER POLYOL information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook.