Posts

Showing posts from December, 2020

Vulcanizing Agents of Rubber

Image
 Vulcanization is a chemical process that is used to improve the properties of both natural and synthetic rubber. Sulfur is the most common vulcanizing agent in rubber. When rubber is heated in the presence of sulfur, accelerator, and activator at 140–160°C, the formation of crosslinks long rubber molecules are formed. At the end of vulcanization, we achieve the rubber with improved elasticity, resilience, tensile strength, viscosity, hardness, and weather resistance. Often a catalyst and initiator is added to accelerate the vulcanization process. These cross-linked elastomers (vulcanized rubber have much better mechanical characteristics), made it possible to turn rubber into something that can help us in our daily life. Unvulcanized rubber has poor mechanical properties and is not very durable that's why using a vulcanizing agent in rubber is a must. OCCL India provides some of the best grade sulfur and insoluble sulfur that are the most important raw material for the tyre indus

Define Rubber Blooming

Image
 Rubber blooming is an undesired phenomenon, simply because it hurts the appearance of the rubber product. Blooming an entirely superficial phenomenon, which means it does not hinder the functionality of rubber. Rubber blooming simply referred to a milky dusting of dry powder on the surface of the rubber compounds. These are the recrystallized rubber compound particulates that are unable to dissolve and come up at the rubber surface as the compound cools down at room temperature after vulcanization. Most of the rubber compounds do not with the elastomers that are in use in the rubber industry, which is why rubber blooming is a common occurrence. In general, there are three types of bloom considering whether is a wet bloom or dry bloom: Exudation Bleeding Oily Bloom

Insoluble Sulfur

Image
You might have not heard of Insoluble sulfur but it is the most preferred curing agent by almost all the different rubber industries. The reason for its popularity is simple, it is one of the best vulcanizing agents that helps improve the quality of rubber by increasing its wearability, and resistance. Make the product more robust and long-lasting. And not just rubber industries, Insoluble sulfur is treated as the best vulcanizing agent we have on this planet. You might find it surprising but without insoluble sulfur, it might be very hard to manufacture tires, rubber pipe, shoes, cable and wire insulating materials, latex, all kinds of automobile rubber parts that we use in today’s age.  Because of its non-blooming nature, it is widely used by tyre manufacturers to make radial tyres.  

Crystex HD OT 20

Image
Characteristics And Application Of Crystex HD OT 20 Characterised as for its high thermal stability, Crystex HD OT 20 is a new used vulcanizing agent for unsaturated elastomers. Apart from high thermal stability, it offers better discursiveness, high content, and high fineness.  All these characteristics help to keep more than 80% of insoluble sulfur after 105℃×15min thermal stability test. Crystex HD OT 20 is considered the best vulcanizing agent for the manufacturing of radial tires. Crystex HD OT 20 also helps to keep the rubber's characteristics uniform, which can lead to overcoming the results of bad viscosity resulting from blooming. This vulcanizing agent helps to deliver better quality tires by increasing the lifespan of a tire and by improving its abrasion resistance. If you are looking for high-quality Crystex HD OT 20, OCCL India provides some great options.

Polymeric Sulfur

Image
 Seeing the current environmental conditions, the world has shifted its interest in the utilization of waste materials to reduce environmental burden, to achieve sustainability, and add product value. There are a number of ways to achieve such a cause, including green chemistry.  Elemental sulphur is one of the main highlights, it is a by-product of petroleum industries and gas refineries and causing environmental waste. As sulfur is the most mass-produced material in the world. Even though it has a limited number of uses.       However to make things right market-leading industries like OCCL are using this waste material and turning it into polymeric sulfur via a process called inverse vulcanization. This helps the company to manufacture chemically stable polymeric sulfur that can be easily used by various industries to make better functioning plastic products.

Insoluble Sulfur

Image
 Sulfur is one of the most common vulcanising agents for unsaturated polymers. Soluble rhombic sulfur and insoluble sulfur both are powders that can cause dust spark (or explosion) that’s why they are usually oil-coated from 2% to 20% oil. Insoluble sulfur made by experts helps completely eradicate these hazards. Insoluble sulphur is the most prominent product used in tyre manufacturing. It is also used in athletic footwear compounding to avoid sulfur blooming in the final products, mixes, and molding blanks. Eliminating bloom is very important other it not only causes the compound to lose track for built-up, but it can also lead to the “unjoints.”

Rubber Vulcanising Agents

Image
 In order to change the plastic properties of rubber to elastic properties via inter-linking of rubber molecules using chemical processes is called vulcanisation. There are mainly two types of vulcanising agents that are divided into inorganic and organic two categories. Vulcanising agents can be divided into inorganic and organic two categories. 1.Inorganic vulcanising agent: Sulfur, sulfur monochloride, selenium, tellurium, etc 2.Organic curing agent: Sulfur-containing accelerators such as accelerator TMTD; organic peroxides such as benzoyl peroxide, polysulfide polymers, quinone oxime compounds, urethane, maleimide derivatives, and others. Insoluble sulfur is the most common and the most prominent rubber vulcanising agents used by tire manufacturers. OCCL is known for providing the best grade vulcanising agents. Visit to check their products and get more details on vulcanising agents.

Polymeric Sulfur

Image
 Elemental sulfur is one of the most widely manufactured materials in the world. Even though it has a limited number of uses, the production of sulfuric acid is one of them. Despite the excess manufacturing of elemental sulfur, the development, and processing method of converting sulfur into useful polymeric sulfur is still not well versed in the industry. Here we will be talking about the simple method known as "inverse vulcanization" So what is inverse vulcanization? The process to prepare chemically stable polymeric materials through the direct copolymerization of elemental sulfur with vinylic monomers is known as inverse vulcanization. It is this process that helps to convert waste into useful polymeric sulfur that can be later used by different industries to build stable plastic products.

Sulphur Based Polymers

Image
 Sulfur-based polymers are uncommon renewable materials that have started to receive more attention in the past few years. The utilization of elemental sulfur with a variety of monomers in their preparation using the inverse vulcanization helps them with granting Sulfur-based polymers. its green nature and unique properties. There are a few characterization techniques that can be used to evaluate the properties of sulphur based polymers . However, the complex structure and lack of solubility hinder the application of standard characterization techniques. Evaluating the chemical, morphological, structural, thermal, rheological, and mechanical properties of sulphur-based polymer vary depending on the type of comonomer and in the reaction and during the heating treatment. Some of the successful application of different characterization techniques: Fourier Transform Infrared Spectroscopy (FTIR) Nuclear Magnetic Resonance (NMR) Raman Spectroscopy Rheometer X-Ray Diffraction (XRD) Scanning E

Why Vulcanizing Agents In Rubber Are Important?

Image
 Natural rubber in its natural state is somewhat elastic but not as strong as to turn it into tires, rubber bands, or chewing gums. Unvulcanized rubber (natural rubber) does not always react to its original shape, it very sticky and can easily be deformed. So in order to make rubber more strong and durable, we add chemical compounds to change the natural rubber. The process is called vulcanization and the chemical compounds are called vulcanizing agents (or accelerators). During the process, sulfur (one of the most common vulcanizing agents in rubber) and other additives are introduced to create a way to bridge or connect the polymer chains that already exist in the rubber. By the end of the vulcanizing process, we get the rubber that can be used more readily due to its durability, strength, and its non-stick properties. And without vulcanizing agents in rubber we don’t have the rubber that we use so often.

What Is Sulfur Polymer?

Image
 Synthetic polymers are one of the most widely manufactured materials in the world. The reason for this is an increasing need to develop new polymers that are more eco-friendly to our environment.  As sulfur is a by-product of petroleum it is always seen as the alternative to carbon for the production of polymers. But it is hard to make a stable sulfur polymer on its own. However, in the presence of high temperature and prolonged reaction time (known as inverse vulcanization), sulfur reacts with the organic cross linking molecules for stable sulfur polymers that prevent them from decomposing. With the help of this process, it is possible to make sulfur polymers that can be later used by the different industries to make more stable plastic products that can be employed to better our daily lives.

Crystex hd ot 20

Image
 Crystex is a non-blooming vulcanizing agent used when dealing with unsaturated elastomers. Being insoluble in elastomers, Crystex is used to delay the scorch, preserve surface track, and prevent migration of sulfur. Application of Crystex HD OT 20 1. HD-OT20 is widely used with natural rubber and various synthetic rubbers to improve its functionality. HD OT 20 helps to turn rubber into a rubber belt, rubber tube, seals, and other rubber products. 2. Another important application of Crystex HD OT 20 is in the tyre manufacturing sector. Advantages of Crystex HD OT 20 1. It helps to overcome the compound disadvantage that is caused due to poor adhesion because of blooming. 2. HD OT 20 helps rubber components to maintain uniform performance. 3. Maintains the surface viscosity of the compound by eliminating the transfer phenomena in the adjacent fillet. 4. Eliminates scorching in the process of mixing and storage. 5. Reduces sulfur usage for better aging and performance of rubber products

What Is Polymeric Sulfur?

Image
 Do you know polymers are one of the most important mass-produced materials on our planet. Largely derived from the supply of petrochemicals. That is why to ensure the sustainable production of polymers and other functional materials we look for alternative feedstocks that can be useful. Polymeric Sulfur is one of the emerging classes of polymers that are made with elemental sulphur. As sulphur is the petroleum byproduct used to convert into useful polymers and other functional materials is a good waste management strategy. Not just the polymeric sulfur but co-polymerization of sulphur with other monomers helps to provide further sustainability in the mass-production of polymers.

Polymeric Blooming Agent

Image
 Blooming is the exudation after processing causing a haze, film, or powder on the surface of the polymer. The blooming of additives may be desirable or undesirable. As migration of antioxidants to the polymer surface may help it resist degradation. On the other hand, blooming is often a high concern when it comes to food packing containers and biomedical devices. However, the innate properties of polymers make them extremely useful for many applications. And to enhance some properties we use blooming agents or additives. Below is a list of some common polymeric blooming agent that help plastic to mold into a daily use item. Plasticizers Lubricants and mold release agents Scratch and mar additives Antistats Compatibilizers Impact modifiers Reinforcing fillers; coupling agents Pigments Blowing agents Antioxidants/stabilizers Some of these are used to reduce static on the surface, help foams expand to a prescribed firmness (blowing agents). While some are here to make sure plastic won&#