Alcotex 7206

One of the core challenges in the suspension polymerization process of polyvinyl chloride (PVC) is polymer scaling on the inner walls and internal components of the reactor. Scale buildup has a negative impact on reactor heat transfer and extends the time it takes for polymerization. More importantly, companies have to do expensive, high-pressure cleaning on their reactors on a regular basis, which reduces how much the equipment can be used. ALCOTEX 225 and ALCOTEX 234 scale inhibitors offer a way to address this issue.     1.Industrial Impacts and Scaling Inhibition Needs of Scaling  Scaling happens in polymerization when free radicals or monomers in water stick to solid surfaces like reactor walls or agitators. They then deposit and polymerize more on these surfaces. These solids, especially metals, can have higher temperatures or provide good places for polymerization, which causes local hot spots or uneven reactions. Scaling has several negative effects on S-PVC production, including:  Limited Production Cycle: A certain number of runs must be completed before shutdown for cleaning, limiting continuous production capacity. Product quality fluctuations: Detached scale contaminating the resin can lead to deterioration in product color, thermal stability, and impurity content. Energy consumption and maintenance costs: Increased energy consumption due to the investment in high-pressure cleaning equipment and labor, as well as decreased heat transfer efficiency. The S-PVC industry focuses on making good scale inhibitors because it helps reactors run longer without stopping.   2. ALCOTEX 225: The Main Barrier Against Reactor Wall Sticking ALCOTEX 225 is clearly defined as a scale inhibitor for vinyl chloride suspension polymerization. Its design goal is to eliminate polymer scale buildup on the inner wall of the reactor. 2.1. Physicochemical Properties Property Typical Value Appearance Dark blue aqueous solution Total Solids 5.0–6.0 PH 12.5–13.0 2.2. Mechanism of Action ALCOTEX 225 (POVAL L-10) achieves anti-sticking by forming an extremely thin protective layer on the inner wall of the reactor. This protective layer primarily functions to: Passivate active sites: Cover and passivate active sites on the metal surface that may initiate free radical polymerization. Change surface energy: Adjust the surface energy of the reactor wall to make it unfavorable for the adsorption and wetting of polymers and monomers. Physical Barrier: Establishes a physical barrier to effectively prevent the adhesion and deposition of VCM monomers or primary polymer particles on the reactor wall. This treatment method ensures the reactor wall remains clean during polymerization, which is key to achieving a significant increase in the number of production runs before cleaning.   3. ALCOTEX 234: Synergistic Protector for Internal Components ALCOTEX 234 is not used alone but is designed to work in conjunction with ALCOTEX 225 as a scaling inhibitor. It focuses on areas that are difficult for ALCOTEX 225 to completely cover or are susceptible to mechanical wear. 3.1. Physicochemical Properties Property Typical Value Appearance Dark blue aqueous solution Freezing Point - 1 Specific Gravity 1.1 Total Solids 19.0-21.0 Viscosity @20℃ < 20 PH > 13.0 3.2. Synergistic Application and Targeted Scaling The main function of ALCOTEX 234 is to eliminate scaling on baffles, agitators, or other areas with poor surface quality inside the reactor. Key Protection Areas: Baffles and agitators are areas subjected to high shear forces during polymerization and are also the areas with the most intense heat transfer and monomer/polymer contact. Scaling in these areas is often more stubborn and difficult to inhibit. Synergistic Effect: By applying ALCOTEX 225 to the reactor walls and ALCOTEX 234 to internal components such as agitators and baffles, a comprehensive, high-strength protection is achieved over the entire polymerization contact surface. This combined application strategy is essential for improving overall production efficiency.   4. Application Implementation and Maximizing Industrial Benefits The use of ALCOTEX 225 and 234 imposes specific requirements on the operation of the polymerization process to ensure maximum effectiveness: Thorough Pretreatment: Before first use of the system, all previous polymerization residues in the reactor must be thoroughly removed, and the reactor must be cleaned and dried. Any residual polymer or impurities will affect the adsorption and film formation of the inhibitor. Formulation and Measurement: The concentration and coating amount of the inhibitor need to be precisely optimized based on the reactor geometry, material, and polymerization formulation of the target PVC product. Industrial Benefits: Successful application of the inhibitor system directly results in higher production runs, significantly increased productivity, and improved stability of PVC resin quality.   The ALCOTEX 225 and 234 system is not merely a cleaning agent, but a specialized surface modification and protection system. Together, they constitute a mature and efficient S-PVC scaling management solution, which is a key technological support for modern PVC polymerization plants to achieve high-yield, stable, and high-quality production.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

Gloves are the most commonly used protective tools in the laboratory besides goggles. There are many types of gloves, and different gloves have different uses.     1. Natural rubber (latex) Latex gloves, made from natural rubber, typically lack a lining and are available in both clean and sterile versions. These gloves can provide effective protection against alkalis, alcohols, and a variety of chemical dilution aqueous solutions, and can better prevent corrosion from aldehydes and ketones.   2. Polyvinyl chloride (PVC) gloves The gloves do not contain allergens, are powder-free, have low dust generation, low ion content, strong chemical corrosion resistance, can protect almost all chemical hazardous substances, and also have anti-static properties. Thickened and treated surfaces (such as fleece surfaces) can also prevent general mechanical wear, and thickened types can also prevent cold, with an operating temperature of -4℃ to 66℃. Can be used in a dust-free environment. PVC gloves grading standards: Grade A products, no holes on the surface of the gloves (PVC gloves with powder), uniform powder, no obvious powder, transparent milky white color, no obvious ink spots, no impurities, and the size and physical properties of each part meet customer requirements. Grade B products, slight stains, 3 small black spots (1mm≤diameter≤2mm), or a large number of small black spots (diameter≤1mm) (diameter>5), deformation, impurities (diameter≤1mm), slightly yellow color, serious nail marks, cracks, and the size and physical properties of each part do not meet the requirements.   3. PE gloves PE gloves are disposable gloves made of polyethylene. These gloves are waterproof, oil-proof, anti-bacterial, and resistant to acids and bases. Note: PE gloves are safe to use with food and are non-toxic. It is better to keep PVC gloves away from food, especially if it's hot.     4. Nitrile rubber gloves Nitrile rubber gloves are usually divided into disposable gloves, medium-duty unlined gloves and light-duty lined gloves. These gloves can prevent erosion by grease (including animal fat), xylene, polyethylene and aliphatic solvents; they can also prevent most pesticide formulations and are often used in the use of biological components and other chemicals. Nitrile rubber gloves do not contain protein, amino compounds and other harmful substances, and rarely cause allergies. They are silicone-free and have certain antistatic properties, which are suitable for the production needs of the electronics industry. They have low surface chemical residues, low ion content and small particle content, and are suitable for strict clean room environments.   5. Neoprene gloves Similar to the comfort of natural rubber, neoprene gloves are resistant to light, aging, flexing, acid and alkali, ozone, combustion, heat and oil.   6. Butyl rubber gloves Butyl rubber is only used as a material for medium-sized unlined gloves and can be used for operations in glove boxes, anaerobic boxes, incubators, and operating boxes; it has super durability against fluoric acid, aqua regia, nitric acid, strong acids, strong alkalis, toluene, alcohol, etc., and is a special rubber synthetic resistant liquid gloves.   7. Polyvinyl alcohol (PVA) gloves Polyvinyl alcohol (PVA) can be used as a material for medium-sized lined gloves, so this type of gloves can provide a high level of protection and corrosion resistance against a variety of organic chemicals, such as aliphatic, aromatic hydrocarbons, chlorinated solvents, fluorocarbons and most ketones (except acetone), esters and ethers.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com