CAS NO 9016-87-9 Polymeric MDI COVESTRO DESMODUR 44V20L Used in Polyurethane Foam

1.Description

DESMODUR 44V20L is a dark-brown, liquid blend of diphenylmethane-4,4'-disocyanate (MDl) with isomer and homologues of higher functionality. lt is used in conjunction with polyols to produce rigid polyurethanes foam.

2.Typical Component Properties

3.Typical Reaction Characteristics

4.Package(s)

250kg/drum

5.Handling and Storage

The product must be stored out of direct sunlight and weather. The containers must always be kept sealedagainst moisture. ldeal storage temperature is approximately 30'C or less, Under these conditions, the product will remain stable for 6 months.

DESMODUR 44V20L may undergo partial crystallization at temperatures below 0°C.The product can, however, be brought back into the liguid state by heating the entire contents of the drum for short time to a maximum of 70°C, although this may lead to an increase in the solids content. Drums - including empty ones - should always be kept tightly sealed.

The product should never be allowed to come into contact with water,which reacts with DESMODUR 44V20L to form polyurea and carbon dioxide. Contact with water in any form (damp drums, solvents containing water, moist air) must be prevented not only during storage, but also when removing material from drum and during processing. Failure to do so may lead to a dangerous build-up of pressure in tanks and drums due to the generation of carbon dioxide.

In addition, polyurea forming in DESMODUR 44V20L can cause solids to separate out, leading to blockages in the filters, pumps and pipelines of the processing equipment and resulting in production problems.

6.Safety Precautions
DESMODUR is a blend of diphenylmethane-diisocyanate, isomers and homologues.
Because of its character, DESMODUR may cause slight to moderate irritation when it is exposed to the skin, the eyes, and the mucous membranes.

Safety goggles and impermeable protective gloves should always be worn if there is a risk of direct exposure when handling DESMODUR. Splashes that are exposed to skin must be wiped off immediately and the contaminated areas must be thoroughly washed with soap and water.
Affected areas should be treated with a qood barrier cream.

To prevent further contact with the skin, contaminated clothing should be changed immediately and thoroughly cleaned before reuse.
The product must be kept away from food items.
Anyone involved in the application of the system must familiarize themselves with the safety precautions required for rigid polyurethane foams.

Qingdao Exceed Fine Chemicals Co., Ltd is a high-tech enterprise that integrates manufacturing and trading. We specialize in the production of polyurethane-based products.

Our company is dedicated to investing in research and development of cutting-edge products, collaborating with leading Chinese universities and institutions. We have successfully developed a heat-vulcanization, environmentally friendly bonding adhesive that rivals the quality of world-renowned brands like Lord and Dow.

At Exceed, we believe in the power of science

Qingdao Exceed Fine Chemicals boasts a team of over 30 skilled technicians, supported by advanced manufacturing equipment and robust production processes. We maintain an independent R&D institute and foster strong collaborations with leading universities and research institutions to continuously enhance our production processes, product quality, and performance.

With decades of dedicated efforts, we have successfully exported our products to markets across the globe, including Europe, Asia, North America, South America, Oceania, and Africa.

Furthermore, leveraging our extensive domestic network, we act as a reliable purchasing agent, assisting customers in sourcing specific materials according to their unique requirements.

Furthermore, we employ a dedicated team of quality control (QC) professionals with expertise in the field of chemicals. This rigorous quality control ensures consistent and reliable product quality for our valued customers.

Currently, we achieve annual export sales exceeding USD 30 million to over 30 countries worldwide, encompassing a diverse product range including polyurethane chemicals, heat-vulcanization environmental friendly bonding adhesive etc.

We understand that customers prioritize competitive pricing, exceptional quality, and consistent product availability. We firmly believe that Exceedchem is the ideal partner to fulfill your specific needs.

As a trusted purchasing agent for clients worldwide, we leverage our extensive experience to source high-quality products at competitive prices. Our primary objective is to deliver the most cost-effective solutions while maintaining the highest standards of quality.