Henan Niujiao Industrial Co., Ltd.
Niujiao Chemical specializes in supplying a variety of chemical products, focusing on the research and development, production and trade of various chemical raw materials and products, relying on superior product quality exported to more than countries and regions.
Why Choose Us
Rich Experience
Niujiao Chemical specializes in supplying a variety of chemical products, We have 20 years experience, focusing on the research and development, production and trade of various chemical raw materials and products, relying on superior product quality exported to more than countries and regions.
Custom Service
We understand that each customer may have unique requirements. We have the flexibility to customize our rubber additives to meet specific formulation needs, ensuring optimal compatibility and performance in various rubber applications.
Global Shipping
The products are exported to more than 100 countries and regions such as the United States, the United Kingdom, France, Japan, Russia, South America, Southeast Asia and Africa. With a complete range of varieties and specifications, favorable prices and excellent services, it has a good reputation in the market.
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What are the Application and uses of Rubber Antioxidants?
Rubber antioxidants are specialized chemical additives used to extend the service life of rubber products by preventing degradation caused by heat, light, oxygen, and weathering. They are integral in maintaining the mechanical properties and integrity of rubber materials over time and under various environmental stresses.
Here are the primary applications and uses of rubber antioxidants:
Automotive Industry
Antioxidants are crucial in the production of tires, hoses, belts, seals, and other automotive parts. They help prevent cracks and deterioration that could lead to failure and accidents.
Rubber Goods Manufacturing
Many rubber products, including industrial belts, conveyor belts, and gaskets, benefit from the inclusion of antioxidants to maintain their flexibility and tensile strength during use and storage.
Plastics and Composite Materials
While not strictly "rubber" per se, plastics and composite materials derived from rubbers, such as PVC and synthetic rubber, also utilize antioxidants to prevent premature aging and ensure longevity.
Building and Construction
In construction, antioxidants are used in roofing membranes, waterproofing materials, and sealants to protect against UV radiation and oxidative stress, thus enhancing durability.
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Wire and Cable Insulation
Electrical wires and cables coated with rubber materials require antioxidants to resist heat and oxidation, ensuring safe and reliable electrical conductivity over time.
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Adhesives and Sealants
Antioxidants are used in adhesive formulations to improve the durability of bonds and prevent degradation that might compromise the adhesion.
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Footwear Industry
In the manufacturing of shoes and other footwear, antioxidants help preserve the quality of the rubber soles, resisting cracking and wear.
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Antioxidants work by donating hydrogen atoms to free radicals, which are highly reactive species formed during oxidation processes. By neutralizing these free radicals, antioxidants prevent the propagation of chain reactions that lead to the breakdown of the rubber's molecular structure.
Common classes of rubber antioxidants include phenolic antioxidants, phosphite esters, and amine antioxidants, each with different mechanisms of action and compatibility with various types of rubber. The selection of an appropriate antioxidant depends on the specific requirements of the rubber product, such as the type of rubber base, anticipated service conditions, and desired longevity.
What is the Role of Antioxidants in Vulcanization?
Antioxidants play an important role in the vulcanization process of rubber. Their main function is to prevent or delay the oxidation of the rubber, which can otherwise lead to degradation and deterioration of the material.
During vulcanization, rubber undergoes chemical reactions that crosslink the polymer chains, resulting in the desired properties of the final product. However, these reactions can also generate free radicals that can cause oxidative damage to the rubber. Antioxidants act as stabilizers, neutralizing these free radicals and preventing them from reacting with the rubber molecules.
By protecting the rubber from oxidation, antioxidants help extend the lifespan and performance of the vulcanized rubber. They can contribute to improved resistance to heat, aging, and mechanical stress. Antioxidants also help maintain the elasticity, tensile strength, and other desired properties of the rubber over time.
The type and amount of antioxidants used in vulcanization depend on the specific rubber formulation and the intended application of the final product. Different antioxidants may be selected based on their effectiveness, compatibility with other ingredients, and resistance to heat and other environmental factors.
In addition to their role in vulcanization, antioxidants can also be added to rubber during the manufacturing process to protect the material during storage and transportation. They are essential in ensuring the quality and durability of rubber products, especially in applications where exposure to oxygen, heat, or other oxidative environments is likely.
Application of antioxidant MBI
As the aging process of rubber progresses and develops, the performance of rubber and its products will gradually decrease, leading to complete loss of useful value. In order to extend the service life of rubber products, it is necessary to add substances that can inhibit the aging process to the rubber, thereby extending the storage and service life of rubber and its products. These substances are called antioxidants.
There are various types of antioxidants with varying effects. According to their main functions, they can be divided into anti thermal oxidants, anti ozone agents, harmful metal ion inhibitors, anti fatigue agents, UV absorbers, anti color cracking agents, etc. However, since each protective function is often not exclusive to a particular antioxidant, most antioxidants can act on several aging factors, but to varying degrees. The commonly used antioxidant MBI in the wire and cable industry is introduced as follows.
Chemical name: 2-mercaptobenzimidazole
English name: MBI (MB)
Molecular formula: C7H6N2S
Molecular weight: 105.16
CAS NO.: 583-39-1
Character: This product is white powder or light-yellow crystalline powder. No odor, but with a bitter taste. Specific gravity 1.42. Soluble in ethanol, acetone, and ethyl acetate, insoluble in petroleum ether, dimethyl ether, insoluble in carbon tetrachloride, benzene, and water. Good storage stability, as a non-polluting second antioxidant.
General rubber, such as butadiene rubber, styrene butadiene rubber, and latex, will use antioxidant MBI, which will make the use of rubber and latex more durable and smoother based on usage. This product can be used alone or in combination with other antioxidants (such as DNP, AP, and other non-polluting antioxidants), achieving significant synergistic effects.
Brightener: Antioxidant MBI is soluble in alkaline solution, and the properties of M make it a brightener for copper, giving the entire copper surface a sense of brightness. Not only that, it can also make the copper surface coating flat and increase the current density.
Foam products: antioxidant MBI is mainly non-polluting in the rubber industry, which can reduce the discoloration degree of rubber vulcanization. It is generally suitable for manufacturing transparent or colorful foam products and is not easy to be polluted.
Antioxidant: Antioxidant MBI is generally used as an antioxidant in natural rubber or latex, as it is more effective than previous antioxidants
It is easier to disperse in rubber and will not change color under sunlight. When used alone, the dosage is generally 1-1.5 parts. When the dosage exceeds 2 parts, it will produce a clear frost phenomenon. The dosage in latex foam rubber is 0.5 phr. Due to its bitter taste, this product is not suitable for use in rubber products that come into contact with food.
What are the Antioxidants in Natural Rubber?
Natural rubber contains its own antioxidant properties, primarily due to the presence of substances like cardanol, which is derived from cashew nutshell liquid (CNSL). Cardanol is a naturally occurring phenolic antioxidant that helps protect the rubber from oxidative degradation. However, natural rubber's inherent antioxidant capacity may not be sufficient to withstand the harsh conditions to which it is often exposed. Therefore, additional synthetic antioxidants are frequently compounded with natural rubber to enhance its resistance to oxidation and extend its service life.
Some common synthetic antioxidants added to natural rubber include:
- Phenolic antioxidants, such as 2,2'-methylenebis(4-methyl-6-tert-butylphenol) (6PPD) and N-1,3-dimethylbutyl-N'-phenyl-p-phenylenediamine (PIPD), which are effective at inhibiting autoxidation reactions.
- Amine antioxidants, like N-isopropyl-N'-phenyl-p-phenylenediamine (IPPD), which offer protection through similar mechanisms but with different structures, providing varied levels of performance depending on the specific application.
- Phosphite esters and phosphate compounds, which can act as metal deactivators and antioxidants, helping to chelate metal ions that might catalyze oxidation reactions.
These synthetic antioxidants are carefully chosen based on the desired properties of the final rubber product, considering factors such as processing temperatures, exposure to light and ozone, and mechanical stresses that the rubber will endure. The compounding recipe is tailored to ensure that the rubber maintains its integrity and functionality throughout its intended lifecycle.
What is the Function of Antioxidant in Latex?
Antioxidants play a crucial role in the preservation of natural latex, which is derived from the sap of the rubber tree (Hevea brasiliensis). Natural latex contains unsaturated fatty acids, primarily linoleic acid, which makes it susceptible to oxidative degradation. Oxidation leads to the formation of peroxides, which can break down the polymer chains, causing the latex to harden and lose its elasticity.
The function of antioxidants in latex is to prevent this oxidative degradation. Antioxidants neutralize free radicals and peroxides that are formed during the oxidation process. By donating hydrogen atoms or electrons, antioxidants stabilize the reactive molecules, preventing further chain reactions that could degrade the latex.
Common antioxidants used in latex include phenolic compounds such as butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), and sulfur-based compounds like dilauryl thiodipropionate (DLTDP). These additives are incorporated into the latex formulation during processing to extend its shelf life and maintain its physical properties over time.
In summary, antioxidants are essential in latex to prevent premature degradation caused by oxidation, ensuring that the rubber maintains its flexibility, resilience, and overall quality during storage and processing.
What is Added to Natural Rubber to Make it Stronger?
To enhance the strength of natural rubber, various substances can be added. Here are some common additives used to strengthen natural rubber:
Carbon Black: Carbon black is a reinforcing filler that is widely used in rubber compounds. It improves the mechanical properties, such as tensile strength, modulus, and resistance, of natural rubber.
Silica Fillers: Silica fillers, such as silica nanoparticles or silica aerogels, can also enhance the mechanical properties of natural rubber. They improve tensile strength, tear resistance, and heat resistance.
Plasticizers: Plasticizers are added to natural rubber to improve its flexibility and processability. Common plasticizers used in rubber compounds include phthalates, naphthenic oils, and vegetable oils.
Antioxidants: As mentioned earlier, antioxidants are added to protect the rubber from oxidative degradation. They help extend the lifespan and performance of the vulcanized rubber.
Crosslinkers: Crosslinkers are chemicals that are added to rubber compounds to promote crosslinking during vulcanization. They improve the strength, elasticity, and durability of the rubber. Common crosslinkers used in rubber compounds include sulfur, peroxides, and metal oxides.
PROCESS AIDS: Process aids are added to rubber compounds to improve their processing characteristics, such as viscosity, mold flow, and demolding. Common process aids used in rubber compounds include zinc oxide, stearic acid, and waxes.
Rubber Chemicals: Specialty rubber chemicals are added to rubber compounds to achieve specific properties or performance requirements. For example, anti-static agents are added to reduce static build-up, while flame retardants are added to improve the flame resistance of the rubber.The choice of additives depends on the specific application and requirements of the rubber product. The formulation of the rubber compound is carefully designed to achieve the desired balance of properties, including strength, elasticity, durability, and processability.
Development Status of Rubber Antioxidants
Antioxidants refer to substances that can delay the aging of polymer compounds. Most can inhibit oxidation, while others can suppress the effects of heat or light, thereby extending the service life of the product. It is generally divided into natural antioxidants, physical antioxidants, and chemical antioxidants. Natural antioxidants are present in natural rubber. Other antioxidants are widely used in various rubber products.
1. Physical antioxidant
White wax is commonly used as a physical antioxidant for ozone and weather aging resistance in rubber compounds. The white wax dissolved in the rubber during vulcanization gradually migrates to the surface of the rubber after cooling, forming a fine and flexible wax film, which then blocks the ozone in the air and plays a protective role. Compared with general protective wax, modified protective wax has many functional groups (such as carboxyl, hydroxyl, etc.) in its molecular structure. The protective ability of modified protective wax is 1.5-3 times higher than that of general protective wax. The use of modified protective wax can reduce the amount of anti-ozone agent used.
2. Chemical antioxidant
The main antioxidants used in the rubber processing process are amine and quinoline antioxidants. The common types are antioxidant 4020，4010NA and TMQ. These three types of anti-aging agents account for more than 80% of China's current use of national defense anti-aging agents.
There are many types of naphthylamine antioxidants, such as phenyl- α - Naphthylamine (antioxidant A), 1-phenyl- β - Naphthylamine (antioxidant D). However, due to its toxicity and carcinogenicity issues, countries have significantly reduced its production value since the 1970s until now.
Paraphenylenediamine antioxidants can be divided into dialkylphenylenediamine, diaryl-phenylenediamine, and alkylarylphenylenediamine based on the functional groups connected to them. The main types of dialkylphenylenediamine antioxidants include antioxidants 4030 and 288. Antioxidant 4030 is easily dispersed and has a high solubility in rubber. When used in large amounts, there is no problem with frost spraying, and it has the effect of accelerating vulcanization and shortening the scorching time of rubber blends; Excellent protection against static ozone aging, significantly superior to antioxidant 4010NA and 4020 with excellent ozone aging resistance, especially suitable for outdoor rubber products such as wires and cables, rubber hoses, and tapes that are under static conditions for a long time. The primary types of alkyl aryl para phenylenediamine antioxidants include antioxidants 40104010NA, 4020, and H. Antioxidant 4020 is currently the largest type of antioxidant used in tire compounds. It has excellent protective effects on ozone aging and bending cracking aging, as well as good protective effects on thermal oxygen aging and weather aging. It also has a passivation effect on variable valence metals and is suitable for NR, BR, SBR, NBR, and CR. When used in combination with white wax (especially mixed wax or microcrystalline wax with branched chains), it can enhance static protection. Compared with antioxidant 4010NA, antioxidant 4020 has better water extraction resistance and can achieve long-term protective effects.
The main types of diaryl para phenylenediamine antioxidants include antioxidants 3100 and H. The characteristic of antioxidant 3100 is that it does not spray, does not irritate the skin, and has a good protective effect on ozone, oxygen, and fatigue aging of tires and other rubber products. It is particularly suitable for heavy-duty and off-road tire compounds with harsh application conditions, and is also a special anti-ozone agent for CR. One or two compatibilizing genes are introduced into the benzene ring at both ends of the molecular structure of antioxidant 3100, so its solubility in rubber is increased, which can increase the amount used in rubber guessing. It can also eliminate the defect of using antioxidant 4010NA and 4020 rubber to turn red, and it has good protection against copper, manganese, and other harmful metals; The disadvantage is that the rubber material turns black brown when exposed to light, resulting in severe pollution. Therefore, it is only suitable for dark colored product rubber materials.
Our Factory
Niujiao Chemical specializes in supplying a variety of chemical products, focusing on the research and development, production and trade of various chemical raw materials and products, relying on superior product quality exported to more than countries and regions. With a complete range of varieties and specifications, favorable prices and excellent services, it has a good reputation in the market, won more and more customers, and reached a mutually beneficial cooperative relationship.
FAQ
Q: What are the application and uses of antioxidants?
Q: What is the role of antioxidants in vulcanization?
Q: What is the function of antioxidant in latex?
Q: What are the Antiozonants for rubber?
Q: What are the industrial uses of antioxidants?
Antioxidants may be added to industrial products, such as stabilizers in fuels and additives in lubricants, to prevent oxidation and polymerization that leads to the formation of engine-fouling residues.
Q: What are the application of antioxidants in cosmetics?
Q: What are the antioxidants in natural rubber?
Q: What is the function of antioxidant in polymer?
Q: What are the antioxidants used in polymers?
Q: Why are antioxidants used in nearly all plastic resins?
Q: What do phenolic antioxidants do?
Q: What is the most important use of rubber?
Q: What is rubber used for the most?
Q: What are the most commonly used antioxidants?
Q: What are the two functions of antioxidants?
Q: What is the most important antioxidant for skin?
Q: What are 3 natural rubber advantages?
Q: What is natural rubber used for?
Q: Is rubber immune to acid?
Q: How do antioxidants protect molecules from being oxidized?
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