Modified MDI,is a mixture of polyol-modified diphenylmethane diisocyanate and polyphenylmethane polyisocyanate. It is a light brown liquid at room temperature. It can be mainly used in the production of rebonded foam and rubber carpet.
Since YUNJIE#904 is a reactive chemical, reaction with atmospheric moisture happens easily and leads to the formation of insoluble urea and carbon dioxide gas, which can result in pressure build-up in closed containers and viscosity increase of the product. Containers must therefore be absolutely dry and carefully sealed after congested with nitrogen. Containers of YUNJIE#904 should be kept properly closed and stored indoors at ambient temperatures (15-25 ℃ )in a well-ventilated area. Storage at low temperatures (below 10℃) may lead to some crystallization; this material must, therefore, be protected from frost. If crystallization does occur, the material should be heated to 70-80℃ to melt it out, strictly prohibit to heat over at local part and should then be thoroughly agitated before use.
Under recommended storage conditions, the shelf life of YUNJIE#904 is six months. If the production is overdue, but it’ s main physical and chemical properties in the guide line, may not effect on it’ s using properties.Safety YUNJIE#904 is of low toxicity by inhalation and skin absorption.