Master Bond EP21TPHT is a new two-component epoxy polysulfide system, designed for bonding applications that require toughened and thermally stable bonds resistant to chemicals. It resists temperatures up to 350° F, much higher than typical epoxy polysulfide systems.
This room temperature curable adhesive also features convenient handling characteristics with a 1-to-1 mix ratio by weight or volume and an easily flowable mixed viscosity of 5,000 to 15,000 cps.
“EP21TPHT offers a high lap shear strength of 1,600 to 1,800 psi and bonds well to a variety of substrates including metals, composites, glass, ceramics, and many rubbers,” said Rohit Ramnath, senior product engineer with Master Bond. “It is a toughened compound with good elongation of 20 to 40%, and a relatively low tensile modulus of 30,000-50,000 psi at room temperature.”
EP21TPHT is an electrically insulative material with a dielectric constant of 3.9 and volume resistivity of more than 1014 ohm-cm at 75° F. It withstands exposure to a wide range of chemicals including but not limited to fuels, oils, hydrocarbons, and hydraulic fluids.
“This combination of properties makes it suitable for applications involving thermal cycling and mechanical stresses,” added Ramnath.
This product is available for use in double barrel syringes and gun dispensers, as well as in ½ pint, pint, quart or gallon container kits.