Diallyl Phthalate
CAS Number: 131-17-9
Diallyl phthalate (DAP) is a bifunctional allyl monomer and crosslinker used in thermosetting DAP resins, fiberglass-filled molding compounds, and reactive plasticizers for PVC. DAP resins cure to highly crosslinked networks with excellent electrical insulation, heat resistance, and dimensional stability, making them critical in electronic and aerospace applications.
Technical Specifications
| appearance | Colorless to pale yellow transparent liquid |
| purity (%) | ≥98.0 |
| moisture (%) | ≤0.1 |
| refractive index (20°C) | 1.513–1.516 |
| acidity (as phthalic acid, %) | ≤0.1 |
Applications
- Fiberglass-reinforced DAP thermosetting molding compounds
- Electrical connector and PCB substrate insulation resins
- Reactive crosslinker and stabilizer in PVC formulations
- Impregnating resin for electrical windings and transformers
- High-temperature aerospace and defense structural composites
Key Features
- Bifunctional allyl groups produce a highly crosslinked thermoset network upon cure
- Outstanding electrical insulation properties (CTI >600V) for electronic components
- Low monomer viscosity for easy impregnation of windings and fiber reinforcement
- Excellent chemical resistance to solvents, acids, and moisture after cure
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CAS Number
131-17-9
Category
Polymer Synthesis ChemicalsAvailability
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