Introduction To Rubber Additives

Rubber additives are a series of fine chemical products added during the processing of natural rubber and synthetic rubber (collectively referred to as "raw rubber") into rubber products, which are used to endow rubber products with performance, maintain the service life of rubber products, and improve the processing performance of rubber compounds. Rubber additives play a crucial role in the structural adjustment of rubber products, the development of new products, the improvement of rubber processing technology, the improvement of rubber product performance and quality, and are indispensable raw materials in the rubber industry.

The natural rubber in the world was discovered by Columbus when he discovered the New World in 1493, but it was not until 1839 that sulfur could be used as a vulcanizing agent to cross-link rubber, thus giving it practical value. From then on, the world rubber industry was born, and the rubber industry also developed.

Rubber additives can be divided into three generations according to their development history, as detailed in the following introduction.

The first generation of rubber additives 1839-1904
The rubber additive products of this era are represented by inorganic vulcanization accelerators. The rubber industry has entered the era of inorganic vulcanization accelerators, but it also has problems such as low promotion efficiency and poor vulcanization performance.
● 1839 Discovering the effect of sulfur on rubber vulcanization

● 1844 Discovering inorganic vulcanization accelerators

● 1846 Discovered that sulfur monochloride can cause rubber to "cold vulcanize", using amine carbonate as a foaming agent

● 1904 Discovered the vulcanization active agent zinc oxide and found that carbon black has a reinforcing effect on rubber

Second generation rubber additives 1905-1980
The rubber additive products of this era were represented by organic vulcanization accelerators. The earlier organic rubber vulcanization accelerator, aniline, had a vulcanization promoting effect, which was discovered by German chemist Oenslaber in 1906 in an experiment in the United States
● 1906 Invention of organic vulcanization accelerators, thiourea type accelerators

● 1912 Invention of dithiocarbamate sulfurization accelerator and invention of p-aminoethylaniline

● 1914 Invention of amines and β- Naphthylamine and p-phenylenediamine can be used as antioxidants

● 1915 Invention of organic peroxides, aromatic nitro compounds, and zinc alkyl xanthate promoters

● 1920 Invention of thiazole based vulcanization accelerators

● 1922 Invention of guanidine type vulcanization accelerator

● 1924 Invention of antioxidant AH

● 1928 Invention of antioxidant A

● 1929 Invention of  thiuram vulcanization accelerator

● 1931 Invention of phenolic non polluting antioxidant

● 1932 Invention of sulfosamide type vulcanization accelerator DIBS、CBS、NOBS

● 1933 Invention of antioxidant D

● 1937 Invention of antioxidant 4010、4010NA、4020

● 1939 Diazo compounds were invented to vulcanize rubber

● 1940 Inventing diazo compounds to vulcanize rubber

● 1943 Invention of isocyanate adhesive

● 1960 Invention of processing rubber additives

● 1966 Invention of Cohedur adhesive

● 1969 Invention CTP

● 1970 Invention of triazine type accelerators

● 1980 Invention of Manobond cobalt salt adhesion enhancer

Third generation rubber additives 1980~

After more than 100 years of research, it was not until the 1980s that the variety of rubber additives began to increase and the system became increasingly mature. At this stage, rubber additive products are characterized by green and multifunctional features.
● 1980-1981 The development of accelerator NS began in China
● 1985 Launch MTT
● 1991~ Continuously developing and starting to apply environmentally friendly non nitrosamine or nitrosamine safe additives such as thiram, sulfonamide, zinc salt accelerators, vulcanizing agents, anti coking agents, plasticizers, etc, ZBPD、TBSI、CBBS、TBzTD、TIBTD、TIBTM、ZDIBC、OTTOS、ZBEC、AS100、E/C、DBD and other products have been successively invented.

Post time: Jul-02-2023