Neoprene - Materials / Alfa Chemistry

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Neoprene

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Catalog Number

ACMA00016637

Product Name

Neoprene

Category

Polymers

Description

Chloroprene, stabilized appears as a clear colorless liquid. Flash point -4°F. May polymerize exothermically if heated or contaminated. If polymerization takes place inside a container, the container may rupture violently. Less dense than water. Vapors heavier than air. Used to make neoprene rubber.;Liquid;COLOURLESS LIQUID WITH PUNGENT ODOUR.;Colorless liquid with a pungent, ether-like odor.;Colorless liquid with a pungent, ether-like odor.

IUPAC Name

2-chlorobuta-1,3-diene

Molecular Weight

88.53g/mol

Molecular Formula

C4H5Cl;CH2=CClCH=CH2;C4H5Cl

Canonical SMILES

C=CC(=C)Cl

InChI

InChI=1S/C4H5Cl/c1-3-4(2)5/h3H,1-2H2

InChI Key

YACLQRRMGMJLJV-UHFFFAOYSA-N

Boiling Point

138.9 °F at 760 mm Hg (NTP, 1992);59.4 °C;59.4 °C;59.4 °C;139°F;139°F

Melting Point

-202 °F (NTP, 1992);-130.0 °C;Varies with the temperature of crystallization, and the time and temperature of any subsequent annealing; approximately 30-70 °C;-130 °C;-130 °C;-153°F;-153°F

Flash Point

-4 °F (NTP, 1992);-20 °C (OPEN CUP);-20 °C c.c.;-4°F;-4°F

Density

0.9583 at 68 °F (USCG, 1999);1.23;0.956 @ 20 °C/4 °C;Relative density (water = 1): 0.96;0.96;0.96

Solubility

Slightly soluble (NTP, 1992);Miscible in ethyl ether, acetone, and benzene; slightly soluble in water.;Soluble in alcohol, diethyl ether;Solubility in water, g/100ml at 20 °C: 0.03 (very poor);Slight

Application

Neoprene, or polychloroprene, is a versatile synthetic elastomer with a wide array of applications due to its remarkable physical, chemical, and mechanical properties. Developed through the polymerization of chloroprene, neoprene stands out for its superior resistance to water, hydrocarbon solvents, gases, and degradation by elements like oxygen and ozone. Its density, good tensile strength without requiring additional carbon black filler, and moderate flame retardance make it suitable for both industrial and commercial uses. Neoprene can withstand continuous use at temperatures ranging from 80-100°C and decomposes between 230-260°C. It is commonly found in mechanical rubber products, adhesive cements, gaskets, seals, and coatings for electric wiring. Additionally, it is employed in creating specialty items and even automotive accessories due to its adaptability in being molded into solid, liquid, and foam forms. Its solubility in various chemicals facilitates its use in contact adhesives, enhancing bonding strength and modifying properties with additives. Overall, neoprene's versatility and robustness make it invaluable in applications requiring resistance to oil, weather, abrasion, and electrical factors.

Color/Form

Colorless liquid

Complexity

54.7

Covalently-Bonded Unit Count

EC Number

204-818-0;618-463-8

Exact Mass

88.007978g/mol

Formal Charge

Heavy Atom Count

ICSC Number

0133

Log P

2.2 (calculated)

MeSH Entry Terms

Chloroprene

Monoisotopic Mass

88.007978g/mol

NSC Number

18589

Odor

Pungent, ether-like odor

Other Experimental

Vulcanized with metallic oxides rather than sulfur; resistant to oils, oxygen, ozone, corona discharge, and electric current; isocyanate-modified form has high flame resistance.;Brittle point: -35 °C; softens @ approximately 80 °C;Polymerizes at room temperature unless inhibited with antioxidants.;Per cent in saturated air: 28 @ 25 °C; conversion factors: 1 mg/l approximates 276.5 ppm and 1 ppm approximates 3.62 mg/cu m @ 25 °C, 760 torr.;Density of saturated air: 1.57 (air= 1);RAPIDLY OXIDIZES TO FORM PEROXIDES AND ACIDIC MATERIALS.;VAPOR PRESSURE: 300 MM HG @ 32.8 °C;Brittle point: -35 °F; softens: @ approx 80 °F

Refractive Index

Index of refraction: 1.5512 at 20 °C;Index of refraction: 1.4583 @ 20 °C/D

Rotatable Bond Count

RTECS Number

EI9625000

Stability

RESISTANT TO OILS, OXYGEN, OZONE, CORONA DISCHARGE, & ELECTRIC CURRENT;POLYMERIZES ON STANDING

UNII

42L93DWV3A

UN Number

1991;1991;1991;1991;1991

Vapor Density