Polyurethane (PU) is an important synthetic material with a wide range of properties. Its products range is wide and versatile.Therefore, the question of whether polyurethane materials are toxic has attracted more and more attention. In fact, qualified polyurethane solid materials are non-toxic, but polyurethane raw material is toxic. Polyurethane has two major raw materials, isocyanate (including TDI, MDI, PIDI, HDI, etc.) and polyether polyol, of which isocyanate is relatively toxic, especially TDI is recognized as toxic, carcinogenic and irritating. Other excipients: catalysts, surfactants and blowing agents are non-toxic and harmless. In recent years, the formulation and process technology of replacing TDI with MDI has received increasing attention and made great progress. The range of applications of MDI is constantly expanding, even in the field of soft foam in the unified TDI. In addition to the process and performance aspects, the environmental aspects are a strong driving force. MDI is known to be much less volatile and relatively less toxic than TDI. When purchasing and using such products, we must pay attention to the stability of products, choose to produce in strict accordance with national standards, and strictly manage, inspect and test related products.

Polyurethane foam (PUF) integrates the sound absorption mechanism of general porous materials and the damping sound absorption mechanism of flexible materials, and has good sound absorption and sound insulation performance, and it is increasingly valued by the atmosphere as a sound absorption and noise reduction material.

If have any problem on foaming, Qichen Chemical could give help for free. The foam is soft, The foam is crispy, and the bubble cells generally relatively thick at this time, The foam falling off., The foam surface bulging.......

One 20GP' of Methylene Chloride (MC for short) ( Cas No. 75-09-2)  was shipped to Africa today.

Two-component polyurethane adhesive is one of the most important categories of polyurethane adhesives, with a wide range of uses and large dosages.

China joined the《Montreal Protocol》formally in 1991 ,committed to completing the elimination of CFC in 2010, and got the job done ahead of schedule in 2007.

Congratulations! A new visual website www.qichenchemical.com is launched and updated. As one of top manufacturers on the field of polyurethane raw materials in China, Qi Chen is committed to provide customized services for our partners continuously. Thanks to our long term cooperation partners, just coming from their trust and authorization, Qichen has expanded our business scope from single field of polyurethane raw materials to the fine chemicals (such as o-phenylphenol, fluobenzene), oilfield chemicals, basic chemicals and other fields this year.

Polyurethane foam is a polymer made of isocyanate and polyether as the main raw materials, under the action of foaming agents, catalysts, flame retardants and other additives, mixed by special equipment, and foamed on site by high-pressure spraying. Polyurethane foam includs flexible foam, rigid foam and semi-rigid foam. Semi-rigid foam and flexible foam are open-cell structures mostly, and rigid foam is closed-cell structures mostly.