Denka Neoprene 750

Chloroprene latex is a type of water-based polymer material formed from chloroprene rubber through emulsion polymerization or re-emulsification processes. This series has great adhesion, strong weather resistance, and high flame retardancy, and it can be used in many ways. The series is divided into two main types: anionic chloroprene latex (SNL series) and cationic chloroprene latex (CRL series). These types are based on different ionic properties and can be used in construction, transportation, industrial bonding, surface reinforcement, coating, and impregnation.   1. SNL Series Core Performance and Technological Advantages ♠ Superior Bonding Strength and Initial Tack In adhesive formulation design, initial tack is a key factor determining production efficiency. SNL series latexes exhibit extremely strong affinity for various substrates, including metals, fabrics, glass fibers, and even porous sponge materials. ♠ Comprehensive Environmental Resistance Unlike natural latex, which is prone to aging, the SNL series inherits the excellent properties of chloroprene rubber (CR). It possesses excellent resistance to ozone, weathering, oil, and chemical corrosion. ♠ Environmental Protection and Process Adaptability In today's increasingly stringent environmental regulations, the water-based, non-toxic, and solvent-free characteristics of the SNL series are one of its biggest competitive advantages. It not only eliminates the health and safety hazards caused by volatile organic compounds (VOCs), but also has a "non-irritating" characteristic.   2. Main Model Performance Characteristics and Application Areas 2.1 SNL-511A Anionic Chloroprene Latex SNL-511A (Neoprene 842A) is a gel-type anionic chloroprene latex with a slower crystallization rate, easy spraying, good flame retardancy, and wide material compatibility. It can be used alone or in combination with natural latex or other synthetic latexes to replace some natural latex applications. Its main application characteristics include: Fast-setting spraying application: It can be used in black asphalt waterproof coating systems, suitable for waterproofing and seepage prevention in water plants, pools, sewage tanks, underground foundation treatment, tunnel and subway construction, roofs, balconies, etc. Engineering Applications: Waterproof coatings for roads, water conservancy projects, canals, subways, etc.; seepage-proof coatings for reservoirs, underground landfills, etc.; corrosion protection and waterproofing for roof steel structure panels. Industrial Applications: Suitable for industrial coatings, impregnated products, composite material adhesives, and can also be used as a bonding substitute for sponge products. SNL-511A's flame retardancy, sprayability, and wide-range adhesion make it a commonly used variety in engineering waterproofing and industrial protective materials.     2.2 SNL-5042 Anionic Neoprene Latex SNL-5042 (Denka Neoprene 750) is characterized by strong initial tack, fast bonding speed, high bond strength, good storage stability, no need for solvents, non-toxicity, ozone resistance, oil resistance, chemical corrosion resistance, and excellent flame retardancy. Its main applications include: Water-based adhesive systems: Footwear materials, flooring, PVC flooring, foam, mattresses, fiber cloth, aluminum foil, glass cloth, etc. Building materials: Bonding of cement, mortar, adhesive mortar, etc., improving the durability and bond strength of the construction site. Transportation and Industrial Products: Adhesive materials for industries such as railway vehicles, automobiles, furniture, and electronic components. This model's fast-drying and strong adhesion characteristics make it particularly suitable for high-efficiency assembly and rapid construction scenarios. 2.3 CRL-50KL Cationic Neoprene Latex CRL-50KL (Denka Neoprene 571) is a cationic latex with positively charged emulsion particles, thus maintaining stability and preventing aggregation even in environments containing Ca²⁺ and Na⁺. Key features include: Excellent weather resistance: Ozone and aging resistant, suitable for long-term exposure environments. Good film-forming properties and high strength: Dense and high-strength film, suitable for structural applications such as waterproofing, corrosion protection, and bonding. Compatible with various substrates: Strong affinity for materials such as cement, fiber, steel, wood, and fiberglass. ♠ Main applications include: Modified bitumen waterproofing materials, rigid waterproofing layers, ship deck coatings, etc. Fiber impregnation, bonding mortars, wood protection, and fiberglass product treatment, etc. Applications include fire-retardant materials, corrosion-resistant coatings, and structural surface reinforcement. The salt resistance and high adhesion of cationic systems make them widely applicable in cement, steel, and composite materials.   3. Packaging, Appearance, and Transportation/Storage Requirements Neoprene latex products are typically white or off-white emulsions. According to available data, the SNL and CRL series products are mostly packaged in 1100 kg ± 2 kg plastic drums for easy transportation and large-scale application. Transportation and storage requirements include: Maintaining a well-ventilated and dry environment during storage and transportation, avoiding direct sunlight and high temperatures. Recommended storage temperature: 5–30℃; if the storage temperature is below 23℃, the shelf life of the product is 6 months from the date of production. Avoid damaging the packaging and keep it sealed to prevent impurities from entering and affecting stability. These storage and transportation requirements ensure that the emulsion remains uniform, non-gelling, and non-stratified before use, guaranteeing the safety and consistency of application and processing.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

Chloroprene rubber (CR)  is one of the commonly used rubber varieties. The strength of vulcanized rubber without carbon black reinforcement can reach 28MPa, and the relative elongation is about 800%. It has the characteristics of oil resistance, flame resistance, oxidation resistance and ozone resistance. It is soluble in benzene and chloroform. It swells slightly but does not dissolve in mineral oil and vegetable oil. 1. Progress in CR Technology Abroad Monomer Production DuPont in the U.S. came up with a liquid method to make chloroprene from butadiene. This is safer than the gas method that was first used. It can produce higher yield products at a lower cost, improve safety, and reduce maintenance costs. In 1992, the company upgraded its monomer production line, moving from a single-loop control system to a computerized distributed control system.  Post-processing technology Recent progress in CR post-processing tech is apparent in the developments related to spiral extrusion dehydration and drying. Chloroprene latex and coagulant go into a screw extruder that has a specific design. The coagulated latex removes most of the water in the dehydration section of the extruder by the back pressure. The success of this process has created conditions for the industrial production of CR and asphalt and CR and short fibers, thereby increasing the operational flexibility and being able to handle CR varieties with poor freezing film-forming and tape-forming properties. In 1992, DuPont launched a series of elastomer masterbatches including CR with Kevlar (polyarylamide) short fibers as reinforcement materials, proving that this process has begun to be used in the production of blended products. Development of new varieties There are hundreds of foreign brands. Companies in the United States and Japan have developed many high-performance special CR based on a series of mature brands. In order to improve the thermal stability of CR, Bayer has developed copolymers of chloroprene (CD) with carboxylic acid amide, carboxylic acid anhydride and (or) carboxylic acid monomers. These new CR also have better spraying and brushing characteristics. Denka Corporation of Japan has also improved traditional products and launched a new generation of CR (Denka chloroprene rubber). For example, the DCR 20 series. Tosoh Corporation of Japan is also developing special shock-absorbing CR, and has produced CR latexes with high softening temperature, good normal temperature and high temperature adhesive properties, high water resistance and stability (SKYPRENE Chloroprene Rubber).     2. Progress in domestic CR technology In 1958, Changshou Chemical Plant in Sichuan, my country built a device for producing CR by acetylene. The main CR production in China does not control the conversion rate, and many places use manual operations, which is basically a workshop-style production status. Besides the earlier producers of CR glue like Chongqing Changshou Chemical Co., Ltd., Shanxi Synthetic Rubber Company, Jiangsu Lianshui Chemical General Plant, and Tianjin Donghai Adhesives Company, Shandong Laizhou Kangbaili Glue Industry Co., Ltd. developed in October 2003 a new CR glue. They carefully chose and mixed the composite solvent.    3. Suggestions for the development of domestic CR industry Strengthen technology development For domestic carbon black firms, boosting investment in science and tech, along with adopting and assimilating advanced foreign tech, is key. These actions should lower consumption and costs, and it should raise acetylene use from 57% to over 70% quickly. Strengthen the development of new varieties To maintain the Mooney viscosity in current products, we will create new types. The focus will be on making functional latex, like carboxyl and copolymer latex. Our goal is to bring high Mooney, non-sulfur regulated WHV to industrial production. Increase market share In the next few years, the market of CR in my country will be saturated, and relevant manufacturers can consider developing overseas markets. At present, the development trend of CR in the world is that the European and American markets are shrinking, while China, Eastern Europe, Russia and Southeast Asia are in the rising stage. CR can not only contend with imported goods locally, but can also progressively expand sales to North America, Eastern Europe, Russia, East Asia, and Southeast Asia.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com