N,N '-m-phenylene bismaleimide HA-8
Ⅰ. Introduction
Product name: N,N '-m-phenylene bismaleimide
Abbreviation: HA-8/PDM/HVA-2
Molecular formula: C14H8N2O4
Molecular weight: 268
Physicochemical properties: Yellow or brown-yellow powder, specific gravity 1.44, soluble in dioxycontinental ring, tetrahydrofuran and hot acetone, insoluble in petroleum bond, methylene chloride, carbon tetrachloride, benzene and water.
CAS NO: 3006-93-7
Appearance:
Structure type:
Ⅱ.Technical indicators
Items
Refers to the standard
Appearance
Yellow powder
Melting point, ℃
195℃or higher
Burning residue, %
0.5% or less
Heat reduction, %
0.5% or less
Acid value, %
0.9% or less
Sieve residue, 325 mesh
0.5% or less
Ⅲ. Use
N,N '-m-phenylene bismaleimide manufactured by Yangchen Tech (also known as PDM or HVA-2) is a multifunctional rubber additive used as a vulcanizing agent in rubber processing, as a secondary vulcanizing agent in peroxide systems, and as an anti-curl agent and casting agent. It can be used in general rubber as well as specialty rubber and plastic systems.
In natural rubber adhesive, combining with sulfur can prevent the return of moisture from vulcanization, improve heat resistance, reduce heat generation, aging resistance, improve the adhesion between rubber and cord and the modulus of vulcanized rubber. Used in shoulder rubber, cushion layer and other rubber materials, it can solve the shoulder hollow problem of bias truck tires, also can be used in large-size thick products of natural rubber and various rubber miscellaneous products.
As an auxiliary vulcanizing agent in special rubbers such as chloroprene rubber, chlorosulphonated polyethylene rubber, styrene butadiene rubber, nitrile rubber, isoprene rubber, butyl rubber, bromobutyl rubber, acrylate rubber, silicone rubber and elastomer rubber, it can significantly improve cross-linking performance, improve heat resistance, suitable for high temperature vulcanization system, and reduce the compression permanent deformation is very obvious. It also reduces the amount of peroxide, prevents the rubber from burning during processing, and improves the adhesive strength between the rubber and the cord and metal.
PDM is a sulfur-free vulcanizing agent, used for cable rubber, it can replace thiazoles, thiuram class and other sulfur-containing vulcanizing agents, to solve the copper wire and copper electrical appliances due to contact with sulfur-containing vulcanizing agent copper sulfide pollution black problem.
PDM is a sulfur-free vulcanizing agent for cable rubber, which can replace sulfur-containing vulcanizing agents such as thiazole and thiuram to solve the problem of blackening of copper wire and copper electrical appliance due to sulfur-containing agents and copper sulfide contamination.
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N,N'-m-phenylene dimaleimide, (HA-8/HVA-2/PDM), is a compound with a special chemical structure. In the field of fine chemicals, it is widely used as a cross-linking agent due to its unique properties. N,N'-m-phenylene dimaleimide (isophthalimide) is irreplaceable as a cross-linking agent, mainly due to its unique chemical structure and properties, as well as its excellent performance in specific applications.
Technical indicators:
Appearance
Yellow powder
Melting point
≥196℃
Moisture content
≤0.5%
Ash content
≤0.5%
1. Structural characteristics:
N,N'-m-phenylene dimaleimide molecule contains two maleimide groups, both of which are highly reactive double bonds. This allows it to undergo addition reactions with compounds containing active hydrogen atoms such as amines, alcohols or carboxylic acids. The benzene ring in the isophthalimide structure gives the molecule good stability and rigidity, making it less likely to deform during the cross-linking process, thus ensuring the stability of the cross-linked structure.
2. Cross-linking mechanism:
When N,N'-m-phenylene dimaleimide is used as a cross-linker, its maleimide groups react with active sites on the polymer chain to form covalent bonds. These covalent bonds link different polymer chains together, forming a three-dimensional cross-linked network.
This cross-linked structure can significantly improve the mechanical properties of the polymer, such as tensile strength, impact strength and heat resistance. It also improves the chemical and solvent resistance of the polymer.
3. Excellent thermal stability and chemical stability:
The benzene ring in the isophthalimide structure enhances its thermal and chemical stability, allowing it to maintain a stable cross-linking effect under high temperatures and harsh environments. This stability makes N,N'-m-phenylene dimaleimide an ideal cross-linker in aerospace, automotive manufacturing and other fields that need to withstand high temperatures and mechanical stress.
4. Good processing performance:
N,N'-m-phenylene dimaleimide has good fluidity and permeability during the cross-linking process, and can be evenly dispersed in the polymer matrix to form a uniform cross-linked network.
This processing performance makes it advantageous in manufacturing parts with complex shapes and structures, and can meet the needs of various fine chemical products.
5. Unique cross-linking mechanism:
The cross-linking mechanism of N,N'-m-phenylene dimaleimide is different from other cross-linking agents in that it achieves cross-linking by forming covalent bonds with active sites on the polymer chain, rather than relying solely on physical entanglement or Weak van der Waals forces.
The formation of this strong covalent bond makes the cross-linked structure more stable and less susceptible to the influence of the external environment, thereby improving the durability and service life of the polymer.
As a cross-linking agent, N,N'-m-phenylene dimaleimide has a unique chemical structure, excellent performance, and excellent performance in specific applications, making it irreplaceable among other cross-linking agents. It is widely used and important in the field of fine chemicals, providing strong support for the preparation of high-performance composite materials.
6.Application :
Due to its excellent cross-linking properties, N,N'-m-phenylene dimaleimide has wide applications in many fields. For example, in the aerospace field, it is used to prepare high-performance composite materials to improve the structural strength of aircraft and spacecraft.In the automotive industry, this cross-linking agent-N,N'-m-phenylene dimaleimide is used to make lighter and stronger car parts to improve vehicle safety and fuel efficiency.
In addition, N,N'-m-phenylene dimaleimide also plays an important role in the fields of electronic and electrical, construction and sporting goods.
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