Diallyl Phthalate[2]

Updated: 2026-09-16

Overview

Diallyl Phthalate (DAP) is an organic compound primarily used as a monomer in the production of thermosetting resins. It is known for its ability to polymerize under heat, forming durable and heat-resistant materials. DAP is widely utilized in industries requiring high-performance resins, such as electronics, automotive, and aerospace. DAP is synthesized through the esterification of phthalic anhydride with allyl alcohol. Its chemical structure allows for cross-linking during polymerization, resulting in materials with excellent mechanical and thermal properties. The compound is typically supplied as a clear to pale yellow liquid with a mild odor.

Physical and Chemical Properties

Diallyl Phthalate exhibits several notable physical and chemical properties. It has a density of 1.12 g/cm³ and a boiling point of 290°C. The compound is insoluble in water but readily dissolves in common organic solvents such as acetone, ethanol, and benzene. Its low melting point of -70°C makes it easy to handle in liquid form. Chemically, DAP is highly reactive due to the presence of allyl groups, which participate in polymerization reactions. This reactivity is harnessed in the production of cross-linked polymers, which are known for their thermal stability and resistance to chemicals. The molecular weight of DAP is 246.26 g/mol, and its molecular formula is C14H14O4.

Main Applications

The primary application of Diallyl Phthalate is in the manufacture of thermosetting resins. These resins are used in a variety of industrial applications, including electrical insulation, adhesives, and coatings. DAP-based resins are particularly valued for their high dielectric strength and resistance to heat and chemicals. In the electronics industry, DAP resins are used to produce circuit boards and other components that require durability and thermal stability. The automotive industry utilizes DAP in the production of heat-resistant parts and coatings. Additionally, DAP is employed in the aerospace sector for its lightweight and high-performance characteristics.

Safety and Storage

Diallyl Phthalate requires careful handling due to its potential health hazards. Prolonged exposure can cause skin and eye irritation, and inhalation of vapors may lead to respiratory issues. It is essential to use personal protective equipment, such as gloves and goggles, when working with DAP. Storage conditions are critical to maintaining the stability of DAP. The compound should be kept in a cool, dry place away from direct sunlight and heat sources. Containers must be tightly sealed to prevent moisture absorption and contamination. In case of spills, absorbent materials should be used, and the area should be ventilated thoroughly.

B2B Procurement Guide

When procuring Diallyl Phthalate, B2B buyers should prioritize suppliers who provide comprehensive technical data sheets and safety information. It is advisable to verify the purity and consistency of the product through third-party testing if necessary. Buyers should also consider the supplier's reputation, delivery timelines, and after-sales support. Price negotiations should take into account the quantity ordered, with bulk purchases often resulting in cost savings. Buyers should also inquire about packaging options to ensure safe transportation and storage. Establishing long-term relationships with reliable suppliers can help secure consistent quality and favorable terms.