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Polychloroprene CAS 9010-98-4

Molecular Formula: C4H5Cl

Formula Weight: 88.5355

ZSpharmac: Polychloroprene Supplement

Product Name: Polychloroprene
CAS No: 9010-98-4
Purity: 99%

Basic Info

Product Name:Polychloroprene
Other Names:Chloroprene Rubber
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Chemical Raw Materials
Appearance:White to Beige Chunks
EINECS No.:618-463-8
Provide:Polychloroprene MSDS;
Polychloroprene COA

What is Polychloroprene?

Polychloroprene Appearance is milky white to beige or light brown flakes or lumps, free of mechanical impurities other than talc, and no scorched particles. Soluble in ethanol, acetic acid, acetone and other organic solvents, slightly soluble in ethylene glycol and water. It is easy to polymerize in the presence of light, heat, electricity and catalyst. Its molecular weight is generally 100,000 to 200,000, its relative density is 1.15 to 1.25, its glass transition temperature is -45°C, it has polarity, and it has regular molecular arrangement and reversible crystallization properties.

Polychloroprene Properties:

Melting point >260 °C
density 1.23 g/mL at 25 °C(lit.)
storage temp. -196°C
form chunks
color White to beige


Polychloroprene Uses

  1. Neoprene has a wide range of uses, mainly used as wire and cable sheaths, rubber hoses, oil-resistant rubber products, heat-resistant conveyor belts, printing rubber sticks, rubber dams, construction sealing strips, road caulking sealants, bridge bearings, and oil fields. Waterproof caps, flame retardant rubber products, various gaskets, anti-corrosion linings for chemical equipment and neoprene adhesives, etc.
  2. Neoprene has developed new uses in construction waterproofing materials, sealing materials, adhesives, marine development, medical and health care, energy development and people’s lives, expanding the application field.
  3. CR122 type neoprene is a polluted general-purpose neoprene, which is especially suitable for the production of colored or light-colored rubber products.
  4. CR2441 Type 2442 Neoprene is the basic raw material for adhesive production. Its formulations are used for the bonding of rubber, leather, wood, metal and other materials.
  5. Neoprene is used to impregnate film products.

Physical and Mechanical Properties of Neoprene

(1) Strength of neoprene
Its raw rubber has high tensile strength and elongation at break, and it belongs to self-reinforcing rubber. The molecular structure of chloroprene rubber is regular, and the molecular chain contains polar chlorine atoms. groups that increase the intermolecular forces. Therefore, under the action of external force, it is easy to stretch and crystallize (self-reinforcing), and the molecules are not easy to slip off. In addition, the molecular weight is larger (20,000 to 200,000), so the tensile strength is larger.
(2) Excellent aging resistance
The chlorine atom connected to the double bond of the chloroprene rubber molecular chain makes both the double bond and the chlorine atom inactive, so the storage stability of the vulcanizate is good; Excellent aging resistance (weather resistance, ozone resistance and heat resistance) performance. Its aging resistance, especially weather resistance and ozone resistance, is second only to ethylene-propylene rubber and butyl rubber among general-purpose rubbers, and far superior to natural rubber; its heat resistance is better than that of natural rubber, styrene-butadiene rubber, and nitrile-butadiene rubber. Similarly, it can be used for a short period of time at 150 ℃, and can be used for 4 months at 90-110 ℃.
(3) Excellent flame resistance
The flame resistance of neoprene rubber is the best among general-purpose rubbers. It has the characteristics of non-spontaneous combustion. It can burn when exposed to flame, but the flame will be extinguished by itself. This is because when neoprene is burned, it can be decomposed under the action of high temperature. hydrogen chloride gas to extinguish the fire.
(4) Excellent oil resistance and solvent resistance
Neoprene’s oil resistance is second only to NBR and better than other general-purpose rubbers. This is because the neoprene molecule contains polar chlorine atoms, which increases the polarity of the molecule.
The chemical resistance of neoprene rubber is also very good. Except for strong oxidizing acids, other acids and alkalis have little effect on it. Neoprene also has better water resistance than other synthetic rubbers.
Due to the regularity and polarity of the molecular structure of neoprene, the large cohesion restricts the thermal movement of the molecules, especially at low temperatures. It is also difficult to restore the original state after tensile deformation, that is, crystallization occurs, the rubber loses its elasticity, and even brittle fracture occurs, so the cold resistance of neoprene rubber is not good.
Neoprene rubber has a greater tendency to crystallize than natural, styrene-butadiene, butyl rubber, etc. This is because the molecule of neoprene rubber is dominated by 1,4 addition trans structure, and the molecules are in a regular linear arrangement structure, which determines The crystallinity of the neoprene rubber is determined, and the higher the content, the stronger the crystallinity of the corresponding neoprene rubber. Unvulcanized rubber and vulcanized rubber will slowly harden and lose adhesion after long-term storage, that is, crystallization occurs. The temperature decreases, the crystallization speed increases, and the rubber becomes hard after crystallization, and the hardness and tensile stress increase.
The relative density of neoprene rubber is between 1.15 and 1.25, generally 1.23. When manufacturing the same volume of products, the dosage is larger than that of general general-purpose rubber.

Neoprene Weatherability and Heat Resistance

Examples of excellent weather resistance of neoprene include wires and cables, and their actual use time is as long as 20 to 30 years. In terms of weather resistance in a broad sense, it should have the properties of UV resistance, heat resistance, cold resistance, water erosion resistance, sand erosion resistance and wind erosion resistance, as well as ozone aging resistance and other properties. The volume glue content of the weather resistance formula is generally more than 50%. When the weather resistance is required to be high, the carbon black formula should be used, and at least 10 parts of fine particle furnace carbon black should be used. Inorganic fillers are preferably clay and calcium silicate. The formula of light-colored products needs to be combined with ultraviolet shielding agent, and iron oxide red, phthalocyanine blue, titanium dioxide, etc. can be used. Anti-aging agent can be used together with heat-resistant and flex-resistant anti-aging agent (amine anti-aging agent) and anti-ozone anti-aging agent (p-phenylenediamine anti-aging agent). Commonly used are antioxidants A, D, 4010, 4010NA, etc. The dosage of the first two is 1 to 2 parts, the dosage of antioxidant 4010 is 1.5 to 2.0 parts, and the amount of antioxidant 4010NA can be used to 5 parts. Softeners should be saturated hydrocarbons, such as paraffin, Vaseline, etc.

Neoprene is often used to manufacture products such as heat-resistant conveyor belts, hoses, and rubber rollers. After the glue is heated, the rigidity increases, the tensile stress and hardness increase, and the tensile strength and elongation decrease. Usually, as long as the elongation is not extremely reduced, it will not hinder use. Therefore, the key to heat resistant formulations is to maintain elongation and minimize hardening. However, from a practical point of view, other physical properties should also be considered, such as resilience, flexural cracking, compression set resistance, etc. These physical properties can be inferred from changes in hardness and elongation.
It is better to use magnesium oxide and zinc oxide system for the vulcanization system, which is not much different from the lead oxide system. The use of 10 to 15 parts of zinc oxide can improve the heat resistance of the rubber compound, especially to maintain its elasticity. Sulfur or compounds that emit sulfur will reduce heat resistance and make the compound hard. Accelerator NA-22 has the best heat resistance effect, and the dosage is 0.75-1.0 parts, which can be used alone or in combination with DM.

Neoprene Compression Set Resistant Compound

Neoprene rubber is often used as seals, gaskets, gaskets, pads, backing plates and other products, and it pays more attention to compression set. As long as the neoprene is properly formulated, its compression set resistance can completely exceed that of natural rubber. The main points of its recipe are as follows.
(1) When compounded with carbon black, the compression set of non-sulfur-adjusted neoprene is smaller than that of sulfur-conditioned neoprene; when compounded with inorganic fillers, the two are roughly equivalent; when low-temperature compression set is required, it should be Use anti-crystalline neoprene, preferably with sulfur.
(2) The degree of vulcanization should be high, which can be achieved by extending the vulcanization time, increasing the vulcanization temperature, and increasing the amount of accelerator.
(3) Soft carbon black is used for carbon black, and moderate dosage is very effective. Inorganic fillers are not effective, and calcined clay has a certain effect, but it reduces the strength and elongation properties of the rubber compound.
(4) Accelerator NA-22 is generally used. If trimethylthiourea is used, the compression set is very small, but the storage stability and elongation are poor. It is best not to use sulfur or sulfuric ointments that release sulfur as accelerators. Among the metal oxides, magnesium oxide and zinc oxide systems are better, and lead oxide systems are worse. Five, flexural crack resistant rubber

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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