Description
Polyurethane, often abbreviated to PU or PUR, is an organic polymer that features many organic units linked via urethane molecules.
Polyurethanes are prepared by reacting polyols (alcohols with more than two reactive hydroxyl groups in each molecule) with diisocyanates or polymeric isocyanates. Suitable catalysts and additives are used wherever necessary. Since a variety of diisocyanates and a wide range of polyols can be used for the production of polyurethane, a wide spectrum of polyurethane materials can be produced to meet the requirements for specific applications. It can also be noted that polyurethanes can exist in a variety of forms including rigid foams, flexible foams, speciality adhesives, chemical-resistant coatings, sealants, and elastomers.
a. POLYOL:
A polyol is an organic compound containing multiple hydroxyl groups. The term “polyol” can have slightly different meanings depending on whether it is being used in the field of food science or that of polymer chemistry. Polyols containing two, three and four hydroxyl groups are a diol, triol, tetrol and so on.
Specification:
- Standard Packing – 210 / 220 kgs barels
- Suitable for Rigid Polyurethanes like PUF panels , PUF slabs , Pipe Insulations , Insitu Applications
b.MDI
Methylene diphenyl diisocyanate is an aromatic diisocyanate. Three isomers are common, varying by the positions of the isocyanate groups around the rings: 2,2′-MDI, 2,4′-MDI, and 4,4′-MDI. The 4,4′ isomer is most widely used, and is also known as 4,4′-diphenylmethane diisocyanate
Specification:
- Standard Packing – 250 kgs barels
- Suitable for Rigid Polyurethanes like PUF panels , PUF slabs , Pipe Insulations , Insitu Applications
