Product Introduction
Dioctyl maleate is a white powder or colorless transparent liquid with a freezing point of -50°C and a boiling point of 195–207°C (0.67 kPa). Its relative density is 0.944 (25°C), and its refractive index is 1.4535 (25°C). It is soluble in most organic solvents but insoluble in water.
Product Function
- Dioctyl maleate serves as a key intermediate in the synthesis of sodium dioctyl sulfosuccinate (fast-penetrant agent T). It also functions as an internal plasticizer and can be copolymerized with vinyl chloride, vinyl acetate, styrene, and acrylates. The resulting copolymers exhibit excellent impact resistance, crack resistance, electrical performance, and optical characteristics, making them suitable for films, coatings, adhesives, rubber, pigment curing agents, petroleum additives, and paper treatment agents.
- Copolymerization with vinyl acetate produces an elastic, rubbery material ideal for paints.
- When paired with vinyl chloride, it acts as a superior low-temperature softener.
- However, its proportion in the copolymer should not exceed 10%, as higher concentrations reduce the heat resistance and mechanical strength of the resin.
- Beyond plasticization, the copolymer is valuable as an adhesive and petroleum additive.
Product Applications
Primary uses include:
- Fragrance synthesis
- Pharmaceutical applications
- Plastic additives
- Chromatographic analysis reagents
Precautions:
This compound is irritating and flammable—handle with protective measures. It is low-toxicity (LD50 > 4200mg/kg).
Toxicological Data for Dioctyl Maleate:
- Oral Administration
- Dose: 14,200 mg/kg
- Test subject: Rodents (Rats)
- Acute toxicity: No additional lethal dose data beyond reported effects.
- Dermal Application
- Dose: 14 mg/kg
- Test subject: Rodents (Rabbits)
- Acute toxicity: No further lethal dose information; only reported effects apply.
Ecological Data for Dioctyl Maleate:
This substance may pose environmental risks, particularly to aquatic ecosystems—exercise caution near water bodies.
Synthesis of Dioctyl Maleate
Charge 180kg maleic anhydride, 510kg isooctanol (2-ethyl hexanol, also referred to as octanol in the plasticizer industry), and 1.8kg p-toluene sulfonic acid into an enamel-lined reactor. Heat and stir until liquefied, then raise the temperature to 140°C over 1–2 hours. Maintain esterification until water is fully removed. After the reaction, cool below 80°C, gradually add 29.5% sodium hydroxide under stirring to neutralize to pH 7–8, wash with water, distill under reduced pressure, and filter to obtain the final product.
Delivery & Packaging
Standard packaging is vacuum-sealed foil bags (1kg/bag) or export drums (25kg/drum). Custom packaging is available upon request.
Delivery options include courier, sea, or air freight. For further details, refer to the reference image below:
For inquiries about Dioctyl maleate, contact: [email protected]
