Overview
SN-242 is a chloroprene rubber that has been modified with mercaptan, characterized by its exceptional adhesive properties and a rapid crystallization rate. This particular grade of polychloroprene demonstrates enhanced crystallization speed, superior cohesiveness, and commendable storage stability. It can be solubilized in toluene or blended solvents. Adhesive cements formulated with SN-242 are noted for their light color, formidable bonding strength, quick-setting capabilities, and easy application, maintaining effective adhesion over extended periods. Furthermore, it exhibits robust resistance to ozone, environmental factors, oils, chemical deterioration, and fire. SN-242 is categorized into two variants: SN-242A and SN-242B.
General properties
Chemical Name: 2-CHLORO-1,3-BUTADIENE POLYMERS
Grade：SN242B
CAS NO.: 9010-98-4
Molecular formula: (C4H5Cl)n
Technical Data:
|
Items |
Index |
|
Appearance |
White or light yellow chips |
|
Molecular Weight |
100,000～600,000 |
|
Density |
1.23 |
|
Softening Temperature (℃) |
80 |
|
Tg(℃) |
-38～-40 |
|
Specific Heat (KJ/kg•℃) |
2.18 |
|
Volume Resistance (Ω•cm) |
109 ～1012 |
|
Crystallization Rate |
Fast |
|
Brookfield Solution Viscosity (mpa.s, 10% toluene solution at 25℃) |
650-900 |
|
Volatiles(wt.%) |
≤0.8 |
|
Ash(wt.%) |
≤1.0 |
Applications:
1. SN-242 serves as a fundamental component in the formulation of adhesives, especially those requiring higher viscosity. This substance can be utilized independently or blended with other variants.
2. It is recognized as the most representative grade for producing adhesives designed for bonding materials in the footwear sector, as well as for use with rubber leather, wood, metal, and various construction materials.
Package:
Packed in 25kg kraft-plastic bag.
Storage:
Store in a cool and ventilated place, away from direct sunlight. The recommended temperature is below 25℃.
Overview Provided that compounds are are appropriately formulated and processed, the resulting vulcanizates demonstrate excellent resistance to environmental factors such as weather and ozone. Additionally, they exhibit strong resistance to aging, hot air, and various chemicals, as well as adequate resistance to oils and gasoline. Furthermore, these materials possess favorable mechanical and physical characteristics, along with notable abrasion resistance.
Overview SNL-511A is a gel-like synthetic latex characterized by its gradual crystallization rate, ease of application by spraying, effective flame resistance, and versatility in bonding various materials. It has diverse applications and can be utilized independently or blended with natural latex or other types of synthetic latex.
Overview SNL-5042 latex exhibits strong initial adhesion, rapid setting time, commendable shelf stability, is non-toxic, solvent-free, and demonstrates resistance to ozone, environmental conditions, oils, chemical degradation, in addition to possessing superior flame-retardant properties.
Overview CRL-50LK cationic latex represents a highly concentrated, environmentally friendly gel-type synthetic latex synthesized via emulsion polymerization with cationic soap serving as the emulsifying agent. This latex exhibits a robust affinity for various substrates, including cement, fibers, steel, and textiles. Additionally, the rubber demonstrates exceptional resistance to aging, oils, and corrosion, alongside possessing favorable film-forming characteristics and commendable storage stability.
Overview SN-236T exhibits a significantly elevated Mooney viscosity along with a moderate crystallization rate, demonstrating superior cohesion and solubility characteristics, making it particularly well-suited for adhesive formulation. Throughout the manufacturing process, the vulcanizates retain their favorable mechanical properties, even in the presence of substantial quantities of fillers and oils.
Overview SN-238 is a versatile mercaptan-modified polychloroprene rubber characterized by a moderate rate of crystallization. A notable feature of SN-238 is its remarkable tear strength. The vulcanizates derived from this material preserve commendable properties even when subjected to high filler content or plasticization. Compounds formulated with SN-238 demonstrate robust resistance to oil, chemicals, ozone, aging, sunlight, fire, and possess commendable electrical properties.
Overview SN-239 is a multifunctional mercaptan-modified polychloroprene rubber that exhibits a moderate crystallization rate. A notable feature of this material is its exceptional tear strength, which remains impressive even under conditions of high filler content or plasticization. With its balanced crystallization rate and favorable solubility, SN-239 can effectively be utilized to modify the viscosity in adhesive formulations, thereby enhancing their thermal stability. The compounds derived from SN-239 demonstrate commendable resistance to oils, chemicals, ozone, and aging, as well as to sunlight exposure, aligning with the characteristics typical of polychloroprene.
Overview SN-240T is a general purpose, mercaptan modified polychloroprene rubber produced by emulsion polymerization. SN240T has high bond strength, good spray ability and brush ability, and a high rate of crystallization. SN-240T has a fast rate of crystallization and strong cohesive capabilities. Adhesive cements prepared with SN-240T are light in color and have excellent storage stability.SN-240T compounds exhibits good oil resistance, chemical corrosion resistance, ozone and aging resistance as well as good heat resistance qualities.
Overview SN241 exhibits a high bond strength，characterized by a rapid crystallization rate. This compound demonstrates enhanced solubility and uniformity, making it suitable for producing adhesive cements that are notably light in color and display excellent storage stability. Furthermore, SN241 is recognized for its superior bond strength, quick setting properties, and ease of application. Additionally, it shows remarkable resistance to ozone, environmental factors, oils, chemical degradation, and does not exhibit flammability, even when subject to fine extension.
Overview SN-242 is a mercaptan-modified chloroprene rubber characterized by its exceptional adhesive qualities and a notably high crystallization rate. This particular grade of polychloroprene is distinguished by a rapid crystallization process, enhanced cohesion, and commendable storage stability. It is soluble in toluene and various mixed solvents. Adhesive cements formulated using SN-242 are notable for their light color, high bonding strength, rapid grip development, and ease of application, while maintaining a long-lasting adhesion layer. Additionally, SN-242 exhibits excellent resistance to ozone, weathering, oils, chemical degradation, and fire. The material can be categorized into two variants: SN-242A and SN-242B.
Overview SN-242 is a chloroprene rubber that has been modified with mercaptan, characterized by its exceptional adhesive properties and a rapid crystallization rate. This particular grade of polychloroprene demonstrates enhanced crystallization speed, superior cohesiveness, and commendable storage stability. It can be solubilized in toluene or blended solvents. Adhesive cements formulated with SN-242 are noted for their light color, formidable bonding strength, quick-setting capabilities, and easy application, maintaining effective adhesion over extended periods. Furthermore, it exhibits robust resistance to ozone, environmental factors, oils, chemical deterioration, and fire. SN-242 is categorized into two variants: SN-242A and SN-242B.
Overview SN243 is a chloroprene rubber modified with mercaptan that exhibits remarkable adhesive strength alongside a significant crystallization rate. Additionally, SN243 demonstrates outstanding and expedited film formation capabilities, allowing the resulting films to be processed easily and safely over extended periods. Furthermore, it is soluble in toluene or various mixed solvents.
Overview SN-244X series comprises general-purpose polychloroprene rubbers, modified with sulfur and manufactured via emulsion polymerization techniques. This series exhibits a rapid crystallization rate, rendering it comparable to the CR-244 grade concerning overall functionality. The SN-244X variant demonstrates an accelerated crystallization rate, enhanced cohesiveness, and commendable storage stability, with a light color in toluene or mixed solvent applications. Compounds formulated with SN-244X display excellent resistance to oils, various chemicals, ozone, aging, as well as sunlight exposure, along with properties characteristic of fire resistance and electrical insulation typical of polychloroprene rubber.
Overview SN245 is a high-bonding strength chloroprene rubber with fast crystallization speed and strong cohesion. It belongs to the category of high viscosity and can be dissolved in toluene or mixed solvents. It has good solubility and uniformity. The prepared glue is light in color and stable in storage. It has high bonding strength, fast adhesion, easy operation, and long bonding layer retention time. It is resistant to ozone, weather, oil, chemical corrosion, and excellent non-flammability.
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