Volume 4 - Loctite.ph

Diallyl Phthalate (DAP, DAIP)ThermosetTrade Names Manufacturer• Cosmic DAPCosmic Plastics• DapexRogers CorporationTypical Properties of Diallyl Phthalate (DAP, DAIP)American EngineeringSIProcessing Temperature 250°F to 350°F 121°C to 171°CGeneral DescriptionDiallyl phthalate (DAP) is the most commonly used of the allylicesters, which are a branch of the polyester family. The backbone ofthe diallyl phthalate monomer is made of a chain of benzene ringsand allyl groups which is formed from a condensation reaction ofphthalic anhydride and allyl alcohol. The monomer is then madeinto a thermoset resin using a peroxide, which may then be furtherpolymerized to create a thermoset plastic using a variety of methods.Specialty grades available include flame retarded and mineral,glass, and synthetic fiber filled. In 2004, the price of DAP rangedapproximately from $2.50 to $6.00 per pound at truckload quantities.General PropertiesAllylic esters are among the most versatile of the thermosettingresins. Allylic resins are chosen for applications that requireoutstanding dimensional stability, ease of molding, low waterabsorption, and excellent electrical properties. Diallyl phthalate hasa continuous service temperature as high as 500°F (260°C). Diallylisophthalate, a similar but more expensive resin, may be used ifsuperior dimensional and thermal stability are required. Allylic estershave excellent resistance to aliphatic hydrocarbons, oils, and alcohols,but are not recommended for use with phenols and oxidizing acids.Linear Mold Shrinkage 0.002 to 0.008 in./in. 0.002 to 0.008 cm/cmMelting Point – –Density 87.4 to 137.3 lb./ft. 3 1.40 to 2.20 g/cm 3Tensile Strength, Yield 3.0 to 3.4 lb./in. 2 x 10 3 2.1 to 2.4 kg/cm 2 x 10 2Tensile Strength, Break 1.0 to 12.5 lb./in. 2 x 10 3 0.7 to 8.8 kg/cm 2 x 10 2Elongation, Break – –Tensile Modulus 13.0 to 20.0 lb./in. 2 x 10 5 9.1 to 14.1 kg/cm 2 x 10 4Flexural Strength, Yield 7.3 to 23.0 lb./in. 2 x 10 3 5.1 to 16.2 kg/cm 2 x 10 2Flexural Modulus 6.7 to 26.0 lb./in. 2 x 10 5 4.7 to 18.3 kg/cm 2 x 10 4Compressive Strength 21.0 to 32.0 lb./in. 2 x 10 3 14.8 to 22.5 kg/cm 2 x 10 2Izod Notched, R.T. 0.3 to 7.0 ft-lb./in. 1.6 to 37.8 kg cm/cmHardness – –Thermal Conductivity 2.1 to 3.3 BTU-in./hr.-ft. 2 -°F 0.30 to 0.48 W/m-°KLinear ThermalExpansionDeflection Temperature@ 264 psiDeflection Temperature@ 66 psiContinuousService Temperature0.3 to 3.5 in./in.-°F x 10 -5 0.5 to 6.3 cm/cm-°C x10 -5250°F to 550°F 121°C to 288°C280°F to 600°F 138°C to 316°C300°F to 500°F 149°C to 260°CDielectric Strength 330 to 480 V/10 -3 in. 1.3 to 1.9 V/mm x 10 4Dielectric Constant@ 1 MHzDissipation Factor@ 1 MHzWater Absorption,24 hr.3.5 to 4.6 3.5 to 4.60.010 to 0.180 0.010 to 0.1800.15 to 0.30% 0.15 to 0.30%Typical Applications• Electrical – Connectors, switches, transformer cases, automotivedistributor caps, insulators, potentiometers• Miscellaneous – Tubing, ducting, radomes, junction boxes,aircraft and missile parts22The Loctite ® Design Guide for Bonding Plastics, Volume 4