Technical Specification

Chemical Name: 4,4'-Thiobis(6-tert-butyl-3-methylphenol) or 4,4'-Thiobis(6-tert-butyl-m-cresol)

Molecular Formula: C₂₂H₃₀O₂S

CAS NO.: 96-69-5

Appearance: White powder

Melting Point: 161–164℃

Moisture Content: ≤1%

Ash Content: ≤0.5%

Description

Riquit® Color Protection Stabilizer HS-300T is a typical thiobisphenol antioxidant. Its special chemical structure endows it with dual functions as a free radical terminator and hydroperoxide decomposer. It exhibits excellent synergistic effect when used together with carbon black, superior to conventional common antioxidants. As a high-performance antioxidant, it plays an important role in multiple polymer material fields relying on its unique chemical structure and outstanding efficacy. It can effectively retard material aging and preserve material properties to guarantee stable quality of various products. It is especially suitable for white, bright-colored or transparent products with high requirements for stability and durability.

Performance Features

When applied in polyethylene materials, this product delivers remarkable advantages as follows: ● Excellent retention of physical properties: Well preserves physical properties of polyethylene base resin such as tensile strength, elongation and melt index. ● Good retention of electrical properties: Maintains the electrical properties of polyethylene, ensuring stability and safety of power transmission for cables and wires. ● High thermal stability: Makes polyethylene products resistant to thermal oxidative degradation during high-temperature processing or service, lowering the risk of material deterioration. ● Enhanced weather resistance: Significantly improves weather resistance of polyethylene articles and reduces aging damage caused by climatic factors. ● Outstanding anti-aging effect: Its anti-aging performance is four times that of ordinary anti-aging agents, greatly extending the service life of polyethylene products and cutting replacement costs induced by aging. ● Low volatility: Lower volatility compared with other common antioxidants. It will not easily escape via volatilization during material processing and application, and delivers long-term stable antioxidant protection.

Application Fields

Suitable for polyolefins, polyesters, polystyrene, ABS resin, polyvinyl chloride, as well as white, bright-colored or transparent products. Besides, it shows outstanding synergistic effect when compounded with carbon black, outperforming conventional antioxidants. It is a non-staining antioxidant, mainly used for polyethylene packaging films, white and light-colored rubber goods, latex products, ABS resin, etc.

Dosage

Recommended loading: 0.2%–0.5%. The specific dosage can be adjusted according to practical requirements. When used as antioxidant for polyethylene food packaging materials: LDPE: maximum dosage shall not exceed 0.05%; HDPE: maximum dosage shall not exceed 0.25%.