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Rubber yellowing is a manifestation of rubber aging, mainly caused by the following reasons:
- Aging reaction: During the use or storage of rubber, it is affected by the action of heat energy, light energy, radiation energy, as well as oxygen, ozone, water and variable metal, which leads to the breakage and cross-linking reaction of rubber molecular chains, and then causes aging, manifested as yellowing, hardening, brittleness and so on.
- Ultraviolet radiation: ultraviolet light can cause the cracking of carbon-carbon bonds or carbon-hydrogen bonds in the rubber molecular chain, resulting in a concentration of activity, leading to degradation of the molecular chain, resulting in yellowing.
- The role of heat and oxygen: over time, rubber materials will undergo oxidation reactions, and heat will accelerate this process, resulting in material discoloration.
- Rubber structure: There is a bond energy between polymer macromolecular chain bonds, and when the energy provided by the outside world is greater than the bond energy, the molecular chain is prone to activity concentration, leading to degradation and yellowing.
- Impurities and metal ions: If there are trace metals and impurities such as NO-3 in silicone rubber, it may cause yellowing after secondary vulcanization.
- Vulcanization process: silicone rubber in the vulcanization process, if the vulcanization temperature is too high or the time is too long, it will lead to the oxidation of the vinyl in the rubber compound, forming conjugated diolefin compounds, so that the silicone rubber turns yellow.
- Reaction container impurities: In the process of rubber reaction, the reaction container may introduce trace metal impurities, such as iron, chromium, etc., which may also lead to yellow silicone rubber.
- Rubber spray frosting: Compounding agents in rubber products, such as sulfur, accelerators, antioxidants, etc., if the amount exceeds the solubility in the rubber, it will migrate from the inside of the rubber to the surface and precipitate, resulting in frosting phenomenon, which may also cause yellowing.
- Rubber formulations: Certain additives used in rubber formulations, such as antioxidants, plasticizers, etc., may produce color changes during the aging process.
In order to prevent rubber from turning yellow, the following measures can be taken:
Optimize rubber formulation and use additives with better aging resistance.
Control vulcanization temperature and time to avoid excessive vulcanization.
Use anti-UV agents and antioxidants to reduce the effects of light and oxygen.
Keep rubber products stored in a suitable environment to avoid high temperature and direct sunlight.
The use of appropriate packaging and storage conditions to reduce the impact of external factors on rubber.
Through these methods, the process of rubber aging and yellowing can be delayed and the service life of rubber products can be extended.
Richon chem is a professional rubber additives supplier. Our products have been exported to 76 countries. If you want to purchase rubber additives from us, please click on the website and contact us. We’ll share you more information.
Website: https://www.richon-chem.com/
E-mail: info@richon-chem.com
Application of Paraffin Wax
Because rubber aging is an inevitable change, rubber antioxidants are used in the production of rubber products to inhibit the aging of products and extend the service life of products. Rubber antioxidants are divided into physical and chemical antioxidants, and paraffin wax is commonly used as physical antioxidants. This passage mainly introduces how paraffin wax plays an anti-aging effect in rubber products and matters that should be paid attention to.
Paraffin is a white, odorless waxy solid, alkane structure, and it is a mixture of straight chain paraffin, branched paraffin and ring hydrocarbons. The commonly used paraffin wax in rubber is ordinary paraffin wax, microcrystalline wax, rubber protective wax. Paraffin wax in rubber is a physical protective agent or softener, which can improve the anti-aging property of rubber and increase the flexibility of rubber. It does not participate in the reaction during vulcanization and is only dissolved in the rubber. When the vulcanization is cooled, it is in a supersaturated state and slowly migrates to the surface of the vulcanized rubber, forming a protective film that insulates against the erosion of oxygen and ozone in the air, thus playing a role in preventing aging.
Paraffin supplied by Richon has the following advantages: the protective film of paraffin is compact and uniform, and there is a certain thickness, which plays a good protective role; The protective film has strong adhesion to rubber; The protective film has a certain stiffness, that is, ductility; The protective film has the corresponding ability to resist high and low temperatures.
The migration rate of common paraffin in rubber is faster, and the protective film can be formed quickly. The migration rate of microcrystalline wax in rubber is relatively slow, and the time of forming protective film is slightly longer, and the protective effect is longer. The migration rate of rubber protective wax in rubber is between the two. The solubility of different varieties of paraffin wax in rubber is different, ordinary paraffin wax > rubber protective wax > microcrystalline wax. When the amount of paraffin exceeds its solubility, it will migrate to the rubber surface, but the amount is too much, the protective film is too thick, and it is easy to crack and fall off, but it affects the protective effect.
Richon chem is a professional Wax supplier. Our company regular export Paraffin Wax, PE Wax, FT Wax and rubber protecting wax. If you would like to know more about the product, please click on the website and contact us. We’ll share you more information.
Website: https://www.richon-chem.com/
E-mail: info@richon-chem.com
Although the ex-factory prices of some domestic SBS brands have continued to rise slightly since March, the market performance has been stagnant, especially in April and May. The SBS market price continued to fluctuate within a range, and traders' profits continued to shrink.
In April, the export volume of SBS continued to increase slightly, with the export volume reaching 9,859.59 tons, up 5.50% month-on-month and 26.19% year-on-year. The cumulative export volume from January to April was 37,000 tons, up 41.39% year-on-year.
DALIAN RICHON CHEM regular exported SBS to Indian, in addition to China brand SBS, LG brand SBS also popular and be exported every month.
Website: https://www.richon-chem.com/
E-mail: info@richon-chem.com
The 2024 Indonesia International Auto Parts Supplies and Equipment Exhibition will be held in Jakarta International Convention and Exhibition Center from May 15 to 17, 2024. Dalian Richon Chem Co., Ltd. is honored to be invited to participate in this event, which has attracted the attention of the global automotive industry. It is organized by INAPA (Jakarta, Indonesia).
As one of the LEADING suppliers of RUBBER chemicals, Dalian Richon Chem Co., Ltd. has been producing rubber accelerators since 1990 and rubber antioxidants since 1995. Main product's throughput as follow:
Accelerator MBT: 14,000mt/year
Accelerator MBTS: 5,000mt/year
Accelerator CBS: 11,000mt/year
Accelerator DCBS: 2,000mt/year
Accelerator TMTD: 4,000mt/year
Accelerator NOBS: 5,000mt/year
Accelerator TBBS: 12,000mt/year
Accelerator ZMBT: 2,000mt/year
Vulcanizing Agent DTDM: 3,000mt/year
Antioxidant TMQ: 10,000mt/year
Adhesive RA-65 (HMMM): 2,000mt/year
Antioxidant 6PPD: 40,000 mt/year
SILICA/ SILICON DIOXIDE: 150,000mt/yea
Our sister company, Dalian FTZ Richon int'l Trade Co., LTD., also exports synthetic rubber, including :CR DCR SBR BR NBR IR CMS-40 SBS SEBS SIS EPDM silicone rubber, etc.
2024 Brazil International Tire & Rubber Industry Exhibition Booth No：E-15
DALIAN RICHON CHEM CO., LTD is going to participate in this exhibition in Brazil:
2024 Brazil International Tire & Rubber Industry Exhibition (EXPOBOR 2024)
Expo Center Norte
São Paulo ,2024/6/26-2024/6/28
Our booth number: E-15
Please contact with my colleague for any inquires:
Miss Shirley +86-13352267458 (WA/Wechat)
If you are interested, pls feel free to contact us when would you come,we will reserve our time for you.
Below is a brief overview of our company as well as our products
DALIAN RICHON CHEM CO.LTD
As one of the leader suppliers for rubber chemicals, we:
Produce rubber accelerators since 1990
Produce rubber antioxidantS since 1995
Main product's throughput as follow:
Accelerator MBT: 14,000mt/year
Accelerator MBTS: 5,000mt/year
Accelerator CBS: 11,000mt/year
Accelerator DCBS: 2,000mt/year
Accelerator TMTD: 4,000mt/year
Accelerator NOBS: 5,000mt/year
Accelerator TBBS: 12,000mt/year
Accelerator ZMBT: 2,000mt/year
Vulcanizing Agent DTDM: 3,000mt/year
Antioxidant TMQ: 10,000mt/year
Adhesive RA-65 (HMMM): 2,000mt/year
Antioxidant 6PPD: 40,000 mt/year
SILICA/ SILICON DIOXIDE: 150,000mt/year
RICHON brand have registered at Russia, EU, and China.
By the way ,our sister company Dalian FTZ Richon Intl Trade Co., Ltd. also export synthetic rubber, include:
CR DCR SBR BR NBR IR CMS-40 SBS SEBS SIS EPDM Silicone Rubber
We have already had several very interesting talks from some distinguished visitors from various countries and we look forward early to the opportunity to benefit from your experience and wisdom.We look forward to seeing you very much and cherish for this meeting.We expect to establish long-term business relations with your company in future.We treasure every opportunity to meet with you, our valued customer.
If you have any questions, please feel free to contact us by phone or email:
Tel: +86-411-82507336 82507337 82507338
Add: I/10F Chinabank Plaza,15 Renmin Road, Dalian,116001 China
E-mail: info@richon-chem.com Website: www.richon-chem.com
We would attend this Russian Exhibition:
Tire & Rubber Industry Exhibition 2024
Moscow , Apr.15- Apr.18, 2024
Our Booth No.: FB098
Please contact with my colleague for any inquires:
Mr. Yufeng Ge +86-13352267498 (WA/Wechat)
If so, pls feel free to inform us when would you come, I would save our time for you.
Dalian F.T.Z. Richon int'l trade Co., Ltd. as one of the leader suppliers for rubber chemicals, we:
Produce rubber accelerators since 1990
Produce rubber antioxidant since 1995
Main product's throughput as follow:
Accelerator MBT: 14,000mt/year
Accelerator MBTS: 5,000mt/year
Accelerator CBS: 11,000mt/year
Accelerator DCBS: 2,000mt/year
Accelerator TMTD: 4,000mt/year
Accelerator NOBS: 5,000mt/year
Accelerator TBBS: 12,000mt/year
Accelerator ZMBT: 2,000mt/year
Vulcanizing Agent DTDM: 3,000mt/year
Antioxidant TMQ: 10,000mt/year
Adhesive RA-65 (HMMM): 2,000mt/year
Antioxidant 6PPD: 40,000 mt/year
SILICA/ SILICON DIOXIDE: 150,000mt/year
Dalian F.T.Z. Richon int'l trade Co., Ltd.is a manufacturer specializing in the research, development, production, sales and service of rubber accelerators, antioxidants and other rubber chemicals in the international market. Our company has made great achievements in rubber accelerators & antioxidants, PVC resin and Silica in 2023. All of them exported more than 10,000mt in 2023. And RICHON brand have registered at Russia, EU, and China. We have obtained ISO9001 certificate. Our products have been exported to more than 70 countries and the amount of exports has reached more than 50 million US dollars last year.
Our sister company Dalian Richon Chemical Co., Ltd. also export Rubber accelerators, Antioxidants, Silica, Carbon black, synthetic rubber, PVC resin, Silicone Rubber, HNBR, Reclaim rubber, Rubber machine and lab instruments.
Welcome customers and friends to visit us and let's go forward hand in hand to create splendid victory.
Tel: +86-411-82507336 82507337 82507338
Add: I/10F Chinabank Plaza,15 Renmin Road, Dalian,116001 China
E-mail: info@richon-chem.com Website: www.richon-rubber.com
We would attend this Turkey Exhibition:
Rubber Eurasia 2024
Istanbul April 17 - 20, 2024
Our Booth：1136D
Please contact with my colleague for any inquiries:
Mr. Xiaofeng Liu +86-13352267538 (WA/Wechat)
If so, pls feel free to inform us when would you come, I would save our time for you.
DALIAN RICHON CHEM CO.LTD
As one of the leader suppliers for rubber chemicals, we:
Produce rubber accelerators since 1990
Produce rubber antioxidant since 1995
Main product's throughput as follow:
Accelerator MBT: 14,000mt/year
Accelerator MBTS: 5,000mt/year
Accelerator CBS: 11,000mt/year
Accelerator DCBS: 2,000mt/year
Accelerator TMTD: 4,000mt/year
Accelerator NOBS: 5,000mt/year
Accelerator TBBS: 12,000mt/year
Accelerator ZMBT: 2,000mt/year
Vulcanizing Agent DTDM: 3,000mt/year
Antioxidant TMQ: 10,000mt/year
Adhesive RA-65 (HMMM): 2,000mt/year
Antioxidant 6PPD: 40,000 mt/year
SILICA/ SILICON DIOXIDE: 150,000mt/year
RICHON brand has registered at Russia, EU, and China.
We would attend this Exhibition in Shanghai: RubberTech China 2023
New International Expo Center, September 04-06, 2023 Our Booth No.: 1B773
Please contact with my colleagues for any inquires:
Mr. Liming Ge +86 13352260048 (WA/Wechat)
Mr. Xiaofeng Liu +86 13352267538 (WA/Wechat)
Mr. Yufeng Ge +86-13352267498 (WA/Wechat)
Miss. Carrie +86-13352260739 (WA/Wechat)
Miss. Candice +86 13352263208 (WA/Wechat)
Mr. Jay +86 13352263296 (WA/Wechat)
Miss. Lynn +86 13029400136 (WA/Wechat)
Miss. Amy +86 13352263029 (WA/Wechat)
If so, pls feel free to inform us when would you come, I would save our time for you.
Dalian FTZ Richon Intl Trade Co., Ltd. (Sister company of Dalian Richon Chem., Ltd.)
As one of the leader suppliers for rubber chemicals, we:
Produce rubber accelerators since 1990
Produce rubber antioxidant since 1995
Main product's throughput as follow:
Accelerator MBT: 14,000mt/year
Accelerator MBTS: 5,000mt/year
Accelerator CBS: 11,000mt/year
Accelerator DCBS: 2,000mt/year
Accelerator TMTD: 4,000mt/year
Accelerator NOBS: 5,000mt/year
Accelerator TBBS: 12,000mt/year
Accelerator ZMBT: 2,000mt/year
Vulcanizing Agent DTDM: 3,000mt/year
Antioxidant TMQ: 10,000mt/year
Adhesive RA-65 (HMMM): 2,000mt/year
Antioxidant 6PPD: 40,000 mt/year
SILICA/ SILICON DIOXIDE: 150,000mt/year
RICHON brand have registered at Russia, EU, and China.
Our synthetic rubber relevant products as follows:
CR DCR SBR BR NBR IR CMS-40 SBS SEBS SIS EPDM Silicone Rubber, etc.
Welcome customers and friends to visit us and let's go forward hand in hand to create splendid victory.
Tel: +86-411-82507336 82507337 82507338
Add: I/10F Chinabank Plaza,15 Renmin Road, Dalian,116001 China
E-mail: info@richon-chem.com Website: www.richon-chem.com
In the rubber products and tire industry, tackifying resins provide the necessary viscosity during the processing process, so rubber products and tire companies are more concerned about the performance of rubber products themselves. However, the study of its viscosification mechanism should also be paid enough attention.
The theoretical research of Dalian Richon Chem on tackifying resins focuses on industries that use a large number of it, such as pressure sensitive adhesives, hot melt adhesives, etc., in these fields, the amount of it can be as high as 50 to 70 parts. Since hot melt adhesives and pressure sensitive adhesives are also composed of rubber and tackifying resins, the tackifying mechanism in these areas can also be applied to the rubber industry. The explanation mechanism can be divided into two aspects: on the one hand, the molecular adsorption and diffusion theory of rubber contact surface, and on the other hand, the formation theory of contact interface. The molecular adsorption and diffusion theory of rubber contact surface includes contact, adsorption, diffusion and other explanations, and finally unified as two-way adsorption and diffusion.
When two materials come into contact, the atoms and molecules in the material will interact with each other. These forces include strong forces such as chemical bonds, as well as weak forces such as hydrogen bonds and dispersion forces. In the case of materials, their viscosity is affected by dispersion, polarity and hydrogen bonding. In the case of rubber materials, polymers can be diffused and entangled upon contact, and through the diffusion of polymer molecules, the two surfaces are finally joined together. This is a good explanation for why small pieces of rubber become whole after a certain amount of time, because over time, the diffusion of the polymer continues and eventually forms a whole. The diffusion and entanglement of polymers are closely related to their relative molecular mass. If the relative molecular mass is small, the diffusion is easy, but the entanglement is low. If the molecular weight is high, the diffusion is difficult, but the entanglement occurs and the strength after entanglement is better. For areas that use less viscosifying resins, when considering the choice of viscosifying resins, it is also necessary to consider the effect of the relative molecular mass of the rubber used on the viscosity.
Dalian Richon is a professional rubber accelerators & antioxidants manufacturer and supplier in China. We can offer tackifying resin with high quality and moderate price. If you have any demand of rubber additives,please feel freely contact us.
According to the different functions and uses of carbon black, it can be roughly classified into: tire and rubber application carbon black, pigment carbon black and conductive carbon black. a.Carbon black for tire and rubber: The main use of carbon black is as a reinforcing agent of rubber, it can form a stable chemical bond with rubber molecular chain, so as to achieve the reinforcing effect. Generally, because the larger the surface area and the higher the structure of the carbon black, the more contact area with the rubber, the better the reinforcement will be. This type of carbon black is often used in tire tread to increase its wear resistance. For rubber products, the most important is the processing performance, usually the use of low specific surface area, high structure of carbon black, so that the rubber material is easy to process and has good extrusion characteristics, while maintaining a certain degree of physical reinforcement characteristics. About 70% of the world’s carbon black is used to make tires, which is the largest application of carbon black. About 20% of the carbon black is used for industrial rubber products other than tires, of which half are used for automotive components, so about 80% of the carbon black is consumed in the automotive industry, it can be seen that the carbon black industry is closely related to the tire industry and the automotive industry.
According to the different functions and uses of carbon black, it can be roughly classified into: tire and rubber application carbon black, pigment carbon black and conductive carbon black. a.Carbon black for tire and rubber: The main use of carbon black is as a reinforcing agent of rubber, it can form a stable chemical bond with rubber molecular chain, so as to achieve the reinforcing effect. Generally, because the larger the surface area and the higher the structure of the carbon black, the more contact area with the rubber, the better the reinforcement will be. This type of carbon black is often used in tire tread to increase its wear resistance. For rubber products, the most important is the processing performance, usually the use of low specific surface area, high structure of carbon black, so that the rubber material is easy to process and has good extrusion characteristics, while maintaining a certain degree of physical reinforcement characteristics. About 70% of the world’s carbon black is used to make tires, which is the largest application of carbon black. About 20% of the carbon black is used for industrial rubber products other than tires, of which half are used for automotive components, so about 80% of the carbon black is consumed in the automotive industry, it can be seen that the carbon black industry is closely related to the tire industry and the automotive industry.