Common testing items of rubber additive materials

Rubber auxiliary materials testing

Products: curing agent, antioxidant, curing accelerator, processing agent, functional agent, softening plasticizer

Physical properties: apparent density melting point softening point crystallization point viscosity acidity iodine absorption value

Material purity: volatile ash heating reduction screen residual insoluble screening rate

Rubber packing test items

Products: carbon black white carbon black titanium dioxide silicate filler carbonate filler

Test items:

Physical properties: apparent density, granularity, whiteness, PH, oil absorption, iodine absorption, specific surface area dispersion

Material purity: The content of heavy metal particles is reduced by heating the residual ash of volatile water soluble matter

Chemical additives testing items

Physical indicators: PH value, chroma, crystallization point, density, whiteness, particle size, oil absorption, determination of activation, pH, boiling range, etc.

Chemical index: purity and impurity content, evaporation residue, acidity, hydroxyl compounds, polymers, total aldehyde content, compound content, peroxide, elemental content, moisture, chloride, alcohol content, heavy metal content, burning residue, insoluble matter content, water soluble matter content, sieve residue content, bulk density, loose degree, volatiles at 105℃, etc.

Common types of rubber auxiliaries

Vulcanization system auxiliaries

Curing agent

1. Sulfur, selenium, tellurium; Sulfur-containing compounds; 2. Organic peroxy compounds; 3. Quinone compounds; 4. 5. Amine compounds; 6. Resin; 7. Metal oxides; 8. Other curing agents.

accelerant

1. Dithiocarbamate; Xanthate; 2. 3. Thiuram; Thiazoles; 4. 5. Secondary sulfonamide; 6. Amine and aldehyde-amine condensates; 7. Guanidine; Thiourea; 8.

activator

1. Zinc oxide; 2. Magnesium oxide; Stearic acid; 3. ...

Auxiliaries for protection system

antioxidant

Amines: 1. Naphthylamine series; 2. Quinoline series; 3. Diphenylamine series; 4. P-phenylenediamine series.

Phenols: 1. Hydrocarbon mononuclear fraction; 2. Alkylated dicarboxyphenol; 3. Alkylation of polynuclear phenols.

Heterocyclic, phosphite esters

Protective wax: microcrystalline wax, earth wax and white wax, etc

Flame retardants: 1. Bromine series; 2. Chlorine system; 3. Phosphorus series; 4. Inorganic substances.

Operating system additives: plasticizer (softener), dispersant, homogenizer, viscosifier, release agent and anti-coke agent.

Reinforcing and filling system additives: carbon black, white carbon black, inorganic reinforcing agent and filler and organic reinforcing agent and filler.

Bonding system additives: m-methyl-white system, cobalt salt bonding accelerator, triazine adhesives, impregnating adhesives and adhesives.

Other additives: foaming agent, defoaming agent, coloring agent, aromatic agent, anti-fogging agent, anti-termite agent, lubricant, release agent, isolation mat treatment agent, product surface modifier and mold cleaning agent, etc.