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Vulcanization is a well known process among the rubber industry. It is a chemical process that is used to turn the natural rubber and other polydiene elastomers into cross-linked polymers. Doing so will help to improve the characteristics of rubber and make it more durable to turn it into the materials that can be used in our daily lives. Vulcanization is not possible without its vulcanizing agents . So it is important to talk about vulcanizing agents as well.  Vulcanising agents Sulfur is the most common vulcanizing agent, but when talking about Vulcanizing agents, they can be easily divided into two different categories. Organic curing agent and inorganic vulcanizing agents. Inorganic Vulcanizing Agent: Sulfur, sulfur monochloride, tellurium, selenium, etc. Organic Curing Agent: Accelerators that contain sulfur such as TMTD, benzoyl peroxit, polysulfide polymers, etc.  Advantages of Vulcanization: Improves the tensile strength and extensibility. Offer excellent resilience i....

Vulcanization is a pretty common process in the rubber industry. It is used to improve the properties of rubber by compounding it with other chemicals like sulphur, hydrogen sulphide, etc. One can say Vulcanization is a chemical process which is used to convert the natural rubber or related polymers into materials with better physical and mechanical properties.  Sulphur or other equivalent curatives or accelerators are the most common vulcanizing agent in rubber used for the process. By adding these additives, polymers will be modified forming cross-links (bridges) between each polymer chain. It is the process of curing elastomers to form better chains to offer excellent rigidity and durability to the rubber material. The rubber and plastic materials that we use in our daily life are only possible to manufacture because of the vulcanization and vulcanizing agents in rubber. Tyre manufacturers are the best-known and most prevalent example of industry using vulcanized rubber. Tyre i...

 Vulcanization is a chemical process that is used to convert natural rubber into cross-linked polymers with improved physical properties. Sulfur is one of the most common vulcanization agents. Sulfur vulcanization was discovered in 1839, since then it has become popular among the rubber manufacturers However, vulcanization is a very slow process, that’s why rubber makers are bound to use accelerators to speed up the process. Sulfur donors are some of the other vulcanization agents. Apart from that organic accelerators that release sulfur at vulcanization temperature can also be used as vulcanizing agent for rubber . By adding these sulfur donors to the compound it forms monosulfidic linkages that provide excellent heat resistance to the rubber.  Benefits of Vulcanized Rubber Vulcanization can cause rubber to shrink. So, the vulcanisation process hardens the rubber, making it less susceptible to deformation in comparision to non-vulcanised rubber which are used to deform far mo...

 Vulcanization is a chemical process that is used to convert natural rubber into cross-linked polymers with improved physical properties. Sulfur is one of the most common vulcanization agents. Sulfur vulcanization was discovered in 1839, since then it has become popular among the rubber manufacturers However, vulcanization is a very slow process, that’s why rubber makers are bound to use accelerators to speed up the process. Sulfur donors (or sulfur bearing chemicals) are some of the other vulcanization agents. Apart from that organic accelerators and other compounds that release sulfur at vulcanization temperature can be used as vulcanizing agent for rubber . By adding these sulfur donors to the compound it forms monosulfidic linkages that provide excellent heat resistance to the rubber. 

 When it comes to sulfur and its polymers, sulfur-based polymers are quite unique. THeir renewable characteristics are getting increasing attention in the market. The utilization of elemental sulfur using the number of monomers during their preparation in the lack of solvents using the inverse vulcanization technique is offering the sulfur and its polymers with green and unique characteristics.  To evaluate the properties of sulfur based polymers a number of characterization techniques have been used. Although the lack of solubility and the complex structure of sulfur-based polymers weakens the application of some standard characterization techniques. Use Of Sulfur-Based Polymers In Rubber Industry To convert the natural rubber and other polydiene elastomers into cross-linked polymers, a chemical process called vulcanization is used. In the rubber industry Rubber is the most common vulcanization agent. But the process of vulcanization of rubber using sulfur-based polymers is ...

 Crystex HD OT 20 is a non-blooming vulcanizing agent used for unsaturated elastomers. One of the main functionality of it is that it retards bin scorch, preventing migration of sulfur. Furthermore it also preserves surface tack. As a result you will get the improved flowability, dispersibility, non-staining and non-discoloring properties.  At vulcanization temperatures, it acts as the rubber maker's sulphur as it depolymerizes to soluble sulphur when the vulcanization temperature reaches. However if not stored under proper conditions, it can revert back to soluble sulphur as it it is a metastable product. Crystex HD OT 20 Application And How To Store As already discussed Crystex HD OT 20 is polymeric sulfur that is insoluble in elastomers.  It helps to retard bin scorch and limit migration of sulfur to conserve surface tack.  Crystex™ HD OT 20 is a metastable product, if not stored properly it can revert back and become soluble sulphur. Now that you know why it is ...

 The crystallization of compounding ingredients that are usually present on the surface of stock, cured or uncured, are always accompanied by the migration of the substance from the bulk to the surface, this phenomenon is known as Blooming. Any ingredient which is soluble in rubber can undergo blooming. These additives are soluble in rubber at high temperature but when cools down it decreases the solubility which leads to the migration to the surface. Blooming results in reducing the thickness of the stock, which is not ideal in the manufacturing of the tires and belts. How To Prevent Blooming In Rubber? Sulphur blooming is one of the major issues tackled by the rubber industry using the insoluble sulphur. To complete the process while avoiding sulphur blooming, the insoluble sulphur is mixed in the compound and the processing temperature is kept below the transition point of sulphur.  That’s why insoluble sulphur is one of the most important components in the rubber industry....

 Crystex™ HD OT 20 by OCCL India is a new non-blooming vulcanizing agent used for unsaturated elastomers. By using crystex hd ot 20, rubber manufacturers are able to prevent migration of sulphur and conserve surface track. Apart from that it also offers non-staining and non-discoloring properties along with improved flowability and dispersibility.   MAJOR APPLICATIONS AND PROPERTIES: Crystex™ HD OT 20 is polymeric sulfur and is insoluble in elastomers.  It can retard bin scorch, prevent migration of sulfur and conserve surface tack. These properties are crucial in the manufacturing of tires. At vulcanization temperature crystex hd ot 20 acts similar to Rubber Maker's sulfur as it will de-polymerize to the soluble sulphur. Crystex™ HD OT 20 is a metastable product. It can revert to soluble sulfur if not kept under proper conditions. Alkaline products can be used as a catalyst in the reversion of crystex hd ot 20 to soluble sulphur. However, the presence of alkaline a...

Blooming is a phenomenon in which additives used in the polymer migrate on the surface. In easy terms the discharge of solid substance on the surface of a polymer is called blooming. This discharge of solid substance can mess up with the design and aesthetics of a plastic/rubber product. Although additives are used to improve the performance and characteristics in Polymeric Blooming Agents . But the surface blooming of additives can change the surface properties of the polymer resulting in undesirable outcomes. From mechanical failures to toxicity in the plastic products can be caused by the blooming. When manufacturing medical devices, manufacturers need to ensure that the plastic is chemically stable and won’t create toxic substances when used in the real situation.  However in some cases blooming is favourable as well. As the migration of antioxidants on the surface of the polymer helps to resist the degradation. So in order to create a good and stabilized plastic product that c...

Insoluble sulphur is a sulphur polymer, it is insoluble in CS2 which makes it a good rubber vulcanizing agent. It is one of the most common and most important elements in the rubber industries. Not just insoluble sulphur acts as an rubber additive agent but it also helps the rubber manufacturers to create high quality products with better resistance to both the ageing and fatigue.   Apart from being marked as the best vulcanizing agent, insoluble sulphur is used to create tires, rubber pipes, cabelas, wire insulation, shoes, latex, automobile rubber parts, etc. Insoluble sulphur also shows the non-blooming characteristics, which makes it the majorly used element when manufacturing radial rubber or synthetic rubber products. Still wondering why insoluble sulphur is widely used in the rubber industry? Here are the applications of insoluble sulphur Insoluble sulphur is used to eliminate the surface bloom in the rubber manufacturing. By adding it to the rubber mixture insoluble s...