초록 ▼

A roofing adhesive particularly suited for use in connection with membrane roofing materials such as EPDM or neoprene is preferably compounded from butyl rubber, a cross-linking system for the butyl rubber and a tackifier. The tensile strength, elongation, modulus at 300% elongation and modulus at f

A roofing adhesive particularly suited for use in connection with membrane roofing materials such as EPDM or neoprene is preferably compounded from butyl rubber, a cross-linking system for the butyl rubber and a tackifier. The tensile strength, elongation, modulus at 300% elongation and modulus at failure of the composition are adjusted within range by choice of components and concentration. The adhesive composition may preferably be formed into a tape for joining sheets of the membrane roofing material.

대표청구항 ▼

A monolayer membrane roofing material with joint laminate which comprises two monolayer sheets of non-tacky, non-adhesive, fully cured elastomeric roofing membrane material, overlapped along a relatively small section of their total width, a tapelike adhesive layer adapted to be disposed only betwee

A monolayer membrane roofing material with joint laminate which comprises two monolayer sheets of non-tacky, non-adhesive, fully cured elastomeric roofing membrane material, overlapped along a relatively small section of their total width, a tapelike adhesive layer adapted to be disposed only between the overlapped sections of the sheets, adhesive layer comprising a permanently tacky cured butyl rubber based composition comprising the reaction product of butyl rubber, a crosslinking system for said butyl rubber, a tackifier compatible with butyl rubber and a filler material, the concentrations of said constituents being chosen such that said composition has a tensile strength of at least 50 psi, an elongation of at least 600%, a modulus at 300% elongation of not more than 12, a modulus at failure of not more than 20, the laminate exhibiting a shear strength of at least 15 psi and a peel strength of at least 2 pounds per linear inch.