Let's talk about the function of  Rubber Vulcanizing agent HVA-2 (PDM), CAS No. 3006-93-7,in this blog.     HVA-2 manufactured by Yangchen Tech can be used as both a vulcanizing agent and a co-vulcanizing agent in peroxide systems during rubber processing. It can also serve as a scorch retarder and tackifier. It is used in rubber components such as shoulder rubber and breaker layers in load-carrying tires to address shoulder voids in bias-ply truck tires. HVA-2 can also serve as a co-vulcanizing agent, improving related properties and thermal stability. It is suitable for high-temperature vulcanization systems, significantly reducing compression set. It can also reduce peroxide usage, prevent scorching during processing, and improve the bond strength between the rubber and cord and metal.   1. As a multifunctional rubber additive, HVA-2 can be used as both a vulcanizing agent and a co-vulcanizing agent in peroxide systems during rubber processing. It can also serve as a scorch retarder. It is suitable for general-purpose rubber, specialty rubber, and rubber-plastic hybrid systems.   2. In natural rubber, when combined with sulfur, it prevents reversion, improves heat resistance, reduces heat buildup, resists aging, and enhances rubber-cord adhesion and vulcanized rubber modulus. Used in rubber components such as shoulder rubber and cushioning media in load-carrying tires, it can address the shoulder void problem in bias-ply truck tires. It can also be used in large-format, thick-walled natural rubber products and various rubber miscellaneous products.   3. As a co-vulcanizing agent in specialty rubbers such as fluoroprene, fluorosulfonated polyethylene rubber, styrene-butadiene rubber, nitrile rubber, isoprene rubber, butyl rubber, bromobutyl rubber, acrylic rubber, silicone rubber, and rubber-plastic blends, HVA-2 significantly improves related properties and heat resistance. It is suitable for high-temperature vulcanization systems, significantly reduces compression set, reduces peroxide usage, prevents scorching during processing, and enhances the bond strength between the rubber and cord and metal.   4. HVA-2 is a sulfur-free vulcanizing agent. It can replace all slag-containing vulcanizing agents such as those in cable rubber, and solves the problem of copper wire and copper electrical appliances being polluted by sulfur generated by connecting sulfur.   If you have any technical questions about HVA-2 ,pls contact us!         

N,N'-m-Phenylene bismaleimide has a variety of applications in tire manufacturing. This chemical can be used as a multifunctional rubber additive, either as a vulcanizing agent or as a co-curing agent in peroxide systems. In addition, it can be used as an anti-scorch agent and viscosity builder.   In natural rubber, N,N'-m-Phenylene bismaleimide, when used in combination with sulfur, prevents vulcanization regression, improves heat resistance, reduces heat generation, enhances aging resistance, and improves the adhesion between the rubber and the cord as well as the modulus of the vulcanized rubber. Therefore, it has a wide range of applications in rubber products such as shoulder rubber and cushion layer of heavy-duty tires, which helps to solve the problem of shoulder void in bias-loaded tires. At the same time, this additive is also suitable for large-size thick products of natural rubber and various rubber miscellaneous products.   In special rubber such as chloroprene rubber, chlorosulfonated polyethylene rubber, styrene butadiene rubber, nitrile rubber, isoprene rubber, butyl rubber, bromobutyl rubber, acrylate rubber, silicone rubber and rubber-plastic concurrently with rubber, N, N'-m-phenylene bismaleimide as an auxiliary vulcanizing agent, can significantly improve the performance of crosslinking, improve heat resistance, especially suitable for high-temperature vulcanization system. It can also significantly reduce the compression permanent deformation, reduce the amount of peroxide, to prevent the rubber in the process of scorching, and improve the rubber and cord and metal bonding strength.   The specific dosage of N,N'- m-phenylene bismaleimide will vary depending on the application. For example, when used as an anti-scorch agent, the dosage is usually in the range of 0.5-1.0 parts, when used as a vulcanizing agent, the dosage is 2-3 parts, when used to improve compression set, the dosage is 1.5 parts, and when used to improve bond strength, the dosage is in the range of 0.5-5.0 parts.   Overall, N,N'- m-phenylene bismaleimide plays an important role in tire manufacturing and offers the possibility of manufacturing better quality and more durable tires by improving the properties and processing of rubber.   If you have any questions,pls feel free to contact: business@xysjgm.com

HVA-2,N,N'-m-phenylene dimaleimide is a multifunctional rubber additive. Besides being widely used in the rubber industry as a vulcanizer, co-vulcanizer, and scorch retarder, it also plays a crucial role in adhesives, primarily due to its ability to significantly improve heat resistance and bond strength. Certificate of Analysis Product Name N,N'-m-phenylenedimaleimide(HA-8) Property Limits Results Form Free Flowing Powder Free Flowing Powder Color Yellow to light Brown Yellow Contamination None None Melting Range℃ ≥195 201.8 Water % ≤ 0.5 0.02 Ash % ≤ 0.3 0.01 Oil % ≤5 3.1 Acidity mgkoH/g ≤5 1.1 Particle Size On 100 mesh % On 325 mesh %   0.0Max 0.5Max   0 0   Applications Specific Functions and Effects Main Function As a heat-resistant modifier (resin monomer), it enhances the overall high-temperature resistance of the adhesive by participating in reactions. Key Benefits:1. Significantly Improves Heat Resistance: Enhances adhesive stability in high-temperature environments, preventing failure due to high temperatures.2. Enhanced Bond Strength: Especially for difficult-to-bond materials such as metals. Typical Dosage The recommended addition level in adhesive formulations is generally 5-10 parts. Applicable Systems For example, Anaerobic Adhesive.    Principle of Action and More Applications HVA-2 molecules contain active double bonds that can undergo cross-linking reactions under heat or in the presence of an initiator, forming a stable network structure. This is why it can function both as a vulcanizing agent and as a heat-resistant modifier in adhesives.   In addition to its general use as a heat-resistant modifier, search results also mention HVA-2's applications in specific applications: 1.Metal Bonding: When used in high-end hot-melt paints and coatings, HVA-2 can improve adhesion to metals. This property is also suitable for adhesives requiring high-strength metal bonding. 2.Aerospace: Because HVA-2 is an excellent polymer heat-resistant additive, it is also used in heat-resistant materials in the aerospace industry, suggesting its potential application in specialty adhesives requiring extreme heat resistance.   Usage Guidelines and Precautions When using HVA-2, there are several things to keep in mind: 1.Dosage: In adhesive formulations, the typical dosage is 5-10 parts. The optimal dosage should be determined through specific experiments. 2.Solubility: Understanding its solubility will help you select the appropriate solvent for pretreatment or dilution. HVA-2 is soluble in dioxane, tetrahydrofuran, and hot acetone, but insoluble in petroleum ether, chloroform, benzene, and water. 3.Storage Conditions: This product should be stored in a cool, dry, well-ventilated place, away from light and heat.    

HVA-2 Application in Rubber Tire: The Ultimate Solution for Reversion and Shoulder Separation -By Yangchen Advanced Materials – A Leading HVA-2 Manufacturer   If you are a tire compounder or a rubber technologist, you have probably faced two persistent nightmares:  reversion and shoulder separation. These issues not only reduce tire life but also increase warranty claims and damage brand reputation.   HVA-2 (N,N’-m-Phenylene bismaleimide) – also known as PDM or HA-8 – is a multifunctional rubber additive that effectively eliminates these problems. In this article, we will explore the HVA-2 application in rubber tire manufacturing, backed by real performance data, and explain why Yangchentech is your most reliable supply partner. 1.What is HVA-2? HVA-2 is an aromatic bismaleimide with two reactive double bonds. It acts as: Anti-reversion agent in sulfur-cured natural rubber Co-agent in peroxide systems Adhesion promoter between rubber and cords Heat-resistant modifier for thick rubber articles Its chemical structure allows it to form thermally stable carbon-carbon crosslinks, which do not break down under prolonged high-temperature vulcanization.   2.Why Does the Tire Industry Need HVA-2? Modern tire manufacturing demands higher productivity (shorter cure times) and larger, heavier loads (more heat generation). Conventional sulfur vulcanization produces polysulfidic bonds that are stable only within a narrow temperature window. Once the temperature exceeds 150°C for extended periods (typical in thick tire components), reversion occurs: crosslinks break, network density drops, and mechanical properties collapse. Consequences of reversion in tires: Reduced tread stiffness and tear strength Shoulder separation – a common failure mode in bias truck tires Poor belt edge adhesion Lower retention of dynamic properties   HVA-2 solves this by generating hybrid crosslinks that resist thermal cleavage, maintaining torque even after 30 minutes at 170°C.     3.Key Benefits of HVA-2 Application in Rubber Tire Eliminates Reversion – Proven by Data Testing Condition Conventional Sulfur Cure Sulfur + 2.5 phr HVA-2 Torque retention after 170°C×30 min 85–88% 98–100% Tensile strength retention (100°C×72h) 72–78% 90–95% Modulus at 300% (MPa) Baseline +15%   With HVA-2, your tire compound stays robust even under severe overcure conditions.   Prevents Shoulder Separation in Bias Truck Tires Adding 2–3 phr of HVA-2 to the shoulder pad and breaker compounds significantly improves the adhesion between natural rubber and nylon/polyester cords. The maleimide ring reacts with amino groups on the fiber surface, forming a covalent bond that withstands dynamic flexing and heat aging.   Result: Reduced scrap rates and fewer field failures.   Improves Heat Aging Resistance HVA-2’s hybrid crosslinks do not revert, so the rubber retains its mechanical integrity after prolonged heat exposure. This translates into longer tire life for long-haul trucks and OTR vehicles.   Enhances Processing Safety At low dosages (0.5–1.0 phr), HVA-2 acts as a scorch retarder, delaying Mooney scorch time by 15–20% without affecting cure rate. This gives you a wider processing window, especially during hot summer shop-floor conditions.