9010-98-4 Usage
Description
Polychloroprene, also known as Neoprene, is a synthetic rubber polymer that exhibits excellent resistance to oil, heat, and weathering. It is highly valued for its durability, flexibility, and strength, making it a versatile material for various applications across different industries.
Uses
Used in Mechanical Rubber Products Industry:
Polychloroprene is used as a solid mechanical rubber product for its exceptional resistance to oil, heat, and weathering. This makes it ideal for manufacturing durable and reliable mechanical rubber products.
Used in Chemical Industry:
Polychloroprene serves as a lining for oil-loading hoses and reaction equipment due to its outstanding resistance to chemicals and ability to withstand high temperatures.
Used in Construction Industry:
As an adhesive cement, polychloroprene provides strong bonding properties and durability in various construction applications.
Used in Aerospace Industry:
Polychloroprene acts as a binder for rocket fuels, offering a stable and reliable component in space exploration and rocket propulsion systems.
Used in Electrical Industry:
Polychloroprene is utilized as a coating for electric wiring, providing insulation and protection against environmental factors and wear.
Used in Automotive and Industrial Seals:
Polychloroprene is employed in the production of gaskets and seals, ensuring tight and durable sealing in various automotive and industrial applications.
Used in Specialty Items Industry:
In the form of liquid, polychloroprene is used to create specialty items through dipping or electrophoresis from the latex, offering unique properties and applications.
Used in Automotive Accessories and Furniture Industry:
Polychloroprene foam serves as an adhesive tape to replace metal fasteners in automotive accessories, providing a lightweight and efficient alternative.
Used in Upholstery and Flooring Industry:
Polychloroprene foam is also used in seat cushions and carpet backing, offering comfort, durability, and adherence to various surfaces.
Used in Sealant Industry:
Polychloroprene foam is utilized as a sealant, providing a reliable and long-lasting solution for sealing and bonding applications.
History
Polychloroprene was discovered in 1930 at E. I. DuPont de Nemours & Co. inWilmington Delaware. The discovery grew out of a need to develop a synthetic substitute for natural rubber. DuPont first marketed this first commercially successful synthetic elastomer as DuPrene in 1933. In response to new technology development that significantly improved the product and manufacturing process, the name was changed to Neoprene in 1936. The current commercially acceptable generic name for this class of chlorinated elastomers is CR or chloroprene rubber.
polychloroprene structure
Production Methods
Commercial polychloroprene rubber is manufactured by aqueous free-radical emulsion polymerization followed by isolation of the solid polymer by one of several processes: freeze roll isolation, drum drying , extruder isolation, precipitation and drying or spray drying. Isolation of powdered polychloroprene has been reviewed. Of the methods cited, freeze roll and drum drying isolation are commercially important.
The large-scale commercial manufacture of polychloroprene consists of eight or nine unit operations:
(1) Monomer solution makeup Water solution makeup
(2) Emulsification
(3) Polymerization
(4) Stripping of residual monomer
(5) Peptization for chloroprene–sulfur copolymers
(6) Freeze roll isolation Drum drying
(7) Drying of freeze-rolled film
(8) Roping
(9) Cutting and packaging (25kg)
Preparation
Polychloroprene is made from one of two starting materials, acetylene or butadiene. Acetylene can be dimerized and then chloronated to form chloroprene. Alternatively, when adequate butadiene is available, this can be directly halogenated (eqs. 7 and 8). In either case, the chloroprene product can then be polymerized to polychloroprene. Essentially a butadiene elastomer with chlorine present in the backbone,the polymer exhibits excellent tensile strength and low hysteresis, much like natural rubber. Tensile strength properties up to 28 MPa are possible with the proper reinforcing system (see FILLERS). The polarity imparted by the chlorine atom improves the oil and solvent resistance approaching those of nitrile polymers. The polymer can be protected with para-phenylenediamine antiozonants to give ozone resistance, and heat aging is also good. As a result, chloroprene elastomers are used in a wide variety of applications needing a balance of such properties.
Hazard
Questionable carcinogen.
Check Digit Verification of cas no
The CAS Registry Mumber 9010-98-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,1 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 9010-98:
(6*9)+(5*0)+(4*1)+(3*0)+(2*9)+(1*8)=84
84 % 10 = 4
So 9010-98-4 is a valid CAS Registry Number.
9010-98-4Relevant articles and documents
Addition of Chloroprene Grignards to Aromatic Aldehydes: Synthesis of Homoallenyl Alcohols
Geissler, Arne G. A.,Breit, Bernhard
supporting information, p. 2621 - 2625 (2021/04/12)
A general procedure for the one-pot synthesis of racemic homoallenyl alcohols from the corresponding aldehyde and chloroprene-derived Grignards is described. Employing bis[2-dimethylaminoethyl]ether (BDMAEE) as an additive at low temperatures shifts the selectivity of the chloroprene Grignard addition to aldehydes such that it is almost exclusive toward allene formation. In a set of follow-up experiments, simple and more elaborate methods for further derivatization have been demonstrated, allowing quick access to more complex structures.
Thermal ring opening of 1,1-dibromo and 1-bromo-2- chloromethylcyclopropanes: Observation of a formal debromochlorination
Sydnes, Leiv K.,Alnes, Karl F. S.,Pettersen, Anita,Brinker, Udo H.
experimental part, p. 479 - 483 (2010/06/16)
When the title compounds are thermolyzed in the gas phase under vacuum or in hot quinoline, several products are formed. A predominant product in all cases is a chlorine-free buta-1,3-diene which has been formed by formal debromochlorination, a reaction n
Gas phase surface-catalyzed HCl addition to vinylacetylene: motion along a catalytic surface. Experiment and theory
Mascavage, Linda M.,Zhang-Plasket, Fan,Sonnet, Philip E.,Dalton, David R.
, p. 9357 - 9367 (2008/12/23)
Gaseous mixtures of HCl and vinylacetylene were permitted to react in Pyrex IR cells (NaCl windows). Gaseous 4-chloro-1,2-butadiene and 2-chloro-1,3-butadiene (chloroprene) were the major products. Kinetic data (FTIR) generated a rate expression in concert with surface catalysis. Computational studies involving surface associated water provide a view that accounts for the experimentally determined orders and a bifurcated pathway producing both products. The results are in accord with wall-adsorbed reactant(s) as well as previously reported computational studies on the reactants.
