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Detailed explanation of MDI adhesive

2020-09-04 11:06:17

MDI is a general name of diphenylmethane diisocyanate, compounds with certain proportion of pure MDI polyphenyl polymethylene polyacrylate, modified materials of pure MDI polymerized MDI. MDI glue, namely MDI green ecological adhesive, refers to a kind of MDI downstream products, used to produce various samples.

MDI is the most important raw material for the production of polyurethane materials. A small amount of MDI is used in other layers except polyurethane materials. Using MDI green ecological adhesive to make board talent only solves the problem of excessive development design of natural resources, but also benefits people's physical mental health of household furniture due to its lack of indoor formaldehyde. It will hopefully turn the promising development trend into a commodity with sales market development prospect industrial development market prospect.

Pure MDI: it is milky white to light yellow crystal at normal temperature, the storage temperature is below 6 degrees. The storage period is three months. The package is generally packed in 250kg stainless steel drum with nitrogen (the tank car is filled with nitrogen for 10 days).

Polymerized MDI: no dark brown liquid, stored at room temperature for 2 years. The package is usually 250kg stainless steel drum filled with nitrogen.

At present, in the international technology of producing MDI with aniline as raw material, crude MDI is recovered by phosgene method, then pure MDI polymerized MDI are separated by fractionation unit.

Brand new technicality: because phosgene has great adverse effects, many processing plants will actively develop new generation processing technologies to replace phosgene production, such as dimethyl carbonate method. However, this method has only achieved success in pilot production workshops, can be applied to large-scale production.



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