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.
General properties
Chemical Name: 2-CHLORO-1,3-BUTADIENE POLYMERS
Grade：SN-238
CAS NO.: 9010-98-4
Molecular formula: (C4H5Cl)n
Technical Data:
|
Items |
Index |
|
Appearance |
White or light grey 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 |
Medium |
|
Mooney Viscosity ML(1+4) 100℃ |
90-110 |
|
Mooney Scorch MS t5 (min) |
≥12 |
|
Module at 500% Elongation（MPa） |
4-8 |
|
Tensile Strength（MPa） |
≥13 |
|
Ultimate Elongation（%） |
≥650 |
|
Volatiles(wt.%) |
≤0.8 |
|
Ash(wt.%) |
≤1.0 |
Applications:
1. The primary use of SN-238 lies in its application for heavily filled composites or in modifying the viscosity of adhesive formulations. It is commonly extruded in hose forms and is especially suited for the production of more rigid wire and cable sheaths.
2. SN-238 is utilized in the formulation of adhesives, notably in the creation of adhesive plasters.
Package:
Packed in 25kg kraft-plastic bag.
Storage:
Keep the item in a cool, well-ventilated area, ensuring it is shielded from direct sunlight. It is advisable to maintain a temperature 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.
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