The main differences between WANNATE PM200 and PM400 are reflected in viscosity, functionality and application system.
First of all, Wanhua aggregates mdi, the specific differences are as follows
In terms of viscosity: The viscosity of PM200 is small, and this characteristic makes it work better in some systems with high fluidity requirements.For example, in the production process, a smaller viscosity can make the material flow and mix more easily, thereby ensuring the uniformity and stability of the product.
The viscosity of PM400 is large, and relatively speaking, it is more suitable in some systems that require higher viscosity to maintain a specific shape or structure.
In terms of functionality: The functionality of PM200 is low, between about 2.6 and 2.7.Functionality is an important indicator to measure the number of reactive groups in a molecule. The lower functionality means that the reactivity of PM200 in chemical reactions is relatively low and the reaction speed is relatively slow.This makes it suitable for application in some systems that do not require high reaction speed but require better fluidity.On the contrary,
PM400 has a higher degree of function, and its higher degree of function gives it a higher reactivity, which can combine with other substances faster in the reaction to form a more complex molecular structure, thereby improving the performance of the material.
Application system: Due to the characteristics of low viscosity and low functionality of PM200, it is widely used in systems with high fluidity requirements, such as polyurethane rigid foam insulation materials, isocyanurate foams, coatings, adhesives, etc.In these applications, good fluidity can ensure that the material can fill the space evenly and form a good thermal insulation, sealing or bonding effect.
Due to its high viscosity and high functionality, PM400 is more suitable for systems with high material strength requirements.For example, the use of PM400 in the PIR system has improved its flame retardant and strength, which can meet some occasions where the material performance requirements are more demanding.