Knowledge

Application of polyurethane prepolymer

Polyurethane prepolymers are widely used in many fields such as polyurethane adhesives, coatings, elastomers, foams and fibers.

Purification scheme of polyurethane prepolymer

First remove peroxide and then dehydrate, qualitatively determine the amount of peroxide, determine the amount of peroxide, remove peroxide, distill, distill twice, remove fractions, and save.

Purification of polyurethane prepolymer

Take 10% newly prepared potassium iodide solution and 10ml polyurethane prepolymer to shake, and the peroxide will be yellow-brown.

Recycling operation for the purification of polyurethane prepolymer

For some chemical products, after they are produced, they cannot be regarded as truly complete. We still need to purify them. For example, polyurethane prepolymers must be purified after they are prod

The development of polyurethane prepolymer

Although the use of hot-press sintering process to prepare boron carbide ceramics can significantly reduce the sintering temperature and increase the density of the sintered body

Low-temperature sintering technology of polyurethane prepolymer

With the development of my country's economy, polyurethane prepolymers are widely used in many fields because of their own performance advantages.

Polyurethane prepolymer raw material foaming process

The foaming process of the semi-prepolymer method of polyurethane prepolymer raw materials is to make part of polyether polyol (white material) and diisocyanate (black material) into prepolymer.

How to ensure the concentration of polyurethane prepolymer raw materials

In reality, many products we use have very strict requirements and regulations when they are prepared, and various operations on the raw materials are very strict.