Crosile-69: High-Efficiency Silane Coupling Agent  Chemical Name: Bis[3-(Triethoxysilyl)Propyl]Tetrasulfide       Molecular Formula: C18H42O6S4Si2 Molecular Weight: 538.94        CAS Number: 40372-72-3   Product Aliases: •Silquest® A-1289 (Momentive, USA)         •Z-6940 (Dow Corning, USA) •Si-69 (Evonik, Germany)    •KBE-846 (Shin-Etsu, Japan)          •B2494 (UCT, USA)   Introduction to Crosile-69 Crosile-69 (Bis[3-(Triethoxysilyl)Propyl]Tetrasulfide) is a highly effective silane coupling agent widely used in the rubber industry, tire manufacturing, and composite material modification. Its unique molecular structure significantly enhances the properties of rubber and other materials, improving mechanical performance, filler dispersion, wear resistance, aging resistance, and environmental sustainability. Key Properties of Crosile-69 • Appearance: Low viscosity, light yellow to transparent liquid with a slight odor • Density (ρ20): 1.069 g/cm³ • Sulfur Content: ≥22% • Refractive Index (nD25): 1.493   • Solubility: Easily soluble in many organic solvents (e.g., ethanol, acetone, toluene), but very low solubility in water Functional Groups of Crosile-69 1.Tetrasulfide Bridge (-S4-): The sulfur bridge allows Crosile-69 to undergo crosslinking reactions during rubber vulcanization, improving rubber strength, hardness, and elasticity.   2.Triethoxy Silane Group (-Si-OCH2CH3): Hydrolyzed to form silanol (-Si-OH), which can react with hydroxyl or carboxyl groups in the rubber matrix, strengthening the bond between the rubber and inorganic fillers. Mechanism of Action of Crosile-69 Crosile-69 improves rubber properties through three main reaction mechanisms: 1.Hydrolysis and Condensation Reaction: In the presence of water or moisture, the ethoxy groups in Crosile-69 hydrolyze into silanols (-Si-OH). These silanols react with hydroxyl (-OH) or carboxyl (-COOH) groups on the surface of inorganic fillers, forming siloxane bonds (Si-O-C), enhancing the mechanical properties of rubber. 2.Coupling Reaction with Rubber Matrix: The silane groups in Crosile-69 react with functional groups (e.g., hydroxyl or carboxyl) in the rubber matrix, forming siloxane bonds, which improve the bonding between the rubber and fillers, enhancing properties such as tear resistance and aging resistance. 3.Reaction During Vulcanization: The tetrasulfide bridge (-S4-) in Crosile-69 breaks during vulcanization, generating active sulfur intermediates (such as -SH), which can crosslink with double bonds (C=C) in the rubber matrix, forming a stable vulcanization network and further enhancing rubber performance. Advantages and Characteristics of Crosile-69 • Improved Filler Dispersion: Crosile-69 significantly improves the dispersion of inorganic fillers (e.g., silica, carbon black) in the rubber...

Sea Freight Will Go Up! The current dilemmas faced by foreign trade companies: The freight is priced at one price per day, frantically rising; If you are willing to pay this money, you may not be able to get the cabinet; The cabinet is guaranteed, and the boat may not be able to open on time; Finally arrived at the destination port, but the port congestion can only continue to queue up on the sea; Shipments that were not originally a problem have become a major problem since the third quarter of last year. According to statistics from shipping consulting agency Drewry, the global container freight volume in the first quarter of 2021 increased by nearly 9% year-on-year, and the average China Export Container Freight Index (CCFI) was 1960.99 points, an increase of 113.33% compared to the same period last year. Compared with the fourth quarter of the previous year, an increase of 56.8%! Not to mention that at the end of March, Evergreen’s container ships also blocked the Suez Canal, the throat of Asia-Europe transportation. The Danish freighter company Vespucci Maritime pointed out that after Evergreen’s stranding accident, shipping around the world must return to normal, let alone four to six months. Therefore, many foreign traders said with emotion that this year they are not working for the boss, but for the shipping company.

Silane Coupling agent Crosile570 Silane Coupling agent Crosile 570(3-Methacryloxypropyltrimethoxysilane) is a methacryl-functional silane, it is a clear, light and heat sensitive liquid with a faintly sweet odour. Silane Coupling agent Crosile 570(3-Methacryloxypropyltrimethoxysilane) is used as adhesion promoter at organic/inorgainc interfaces, as surface modifier (e.g. imparting water repellency, organophilic surface adjustment) or as crosslinking of polymers). Crosile570 is used as a coupling agent to improve the physical and electrical properties of glass-reinforced and mineral-filled thermosetting resins under exposure to heat and/or moisture. Crosile570 is typically employed as a blend additive in resin systems that cure via a free radical mechanism (e.g. polyester, acrylic) and in filled or reinforced thermoplastic polymers, including polyolefins and polyurethanes. Crosile570 is also used to functionalize resins via radical initiated processes – copolymerization or grafting – and to modify surfaces. Applications Crosile 570(3-Methacryloxypropyltrimethoxysilane) can improve strength as glass fiber size composite in reinforced polyester composites. Enhance initial and wet strength of reinforced polyester resin composites. Enhance the wet electrical properties of many mineral-filled and reinforced composites. Crosslinked acrylic type resins can improve adhesion and durability

What is the Difference Between Hydrocarbon Resin C5? The biggest differences between Hydrocarbon Resin C5 is the amount of moisture in each product. Resin C5 is slightly heavier than Resin C5 which makes it absorbs quickly and stay moist longer. The other difference between both products is the degree of polymerization, which is explained in detail below. Resin C5 has a lot of polymerization and has been named by some as the real resin because it has a high level of hydrophobic, that is it will not allow water to enter into the material, while Hydrocarbon Resin C5 does not have as much polymerization, it is just barely there. This is why it does not form into a solid when heated. Many factors go into the formulas of these two different grades of resin. The amount of heat used and how long the heat is left on for will determine the amount of polymerization that occurs in either of these two resins. If you set the thermostat on your oven to a very low setting, and if you use a small amount of heat for the time the product is being treated with resin then you will get both type of resins, but the second one will retain its shape better and is easier to work with. In order to determine the amount of polymerization of Hydrocarbon Resin, it is important to use a simple flow technique. This method is very simple to use and is used often to test the properties of a material. Put the material in a container that is similar to the thermostat of the oven, add a few drops of this substance, and allow it to warm up. Once it reaches a boil you can then remove the container and examine the material for any changes. Hydrocarbon Resin is completely saturated with water, even though the product is totally wet. The material looks liquid, but not like any liquid we are familiar with. This type of material can be easily molded, and sanded, but not all of the properties of the resin will be retained in this state. Once the product is cleaned, no matter how it was cleaned, the moisture is not removed. It will hold the water in the resin and will not dry out. It has a water-resistance properties in its water-saturated state, which is the first step towards molding it. Hydrocarbon Resin C5 will hold the water in until it has completely cured, which is two to four weeks depending on the manufacturer of the product. This is why it is important to not scrub the product off once it has cured and is removed from the container. All products are made differently. If you are looking for an answer to the question “what is the difference between Hydrocarbon Resin C5” then this information will help you decide which is best for your application. What is the Difference Between Hydrocarbon Resin C5?