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 membrane roofing adhesive tape comprising a layer of adhesive material, said adhesive material comprising a cured butyl rubber based composition formed by compounding a minor portion of a butyl rubber copolymer, a curing agent for said butyl rubber, at least 2 parts carbon black per hundred parts

A membrane roofing adhesive tape comprising a layer of adhesive material, said adhesive material comprising a cured butyl rubber based composition formed by compounding a minor portion of a butyl rubber copolymer, a curing agent for said butyl rubber, at least 2 parts carbon black per hundred parts butyl rubber and a major portion of a tackifier compatible with butyl rubber and forming and curing the composition in a strip, the composition being compounded such that upon being cured it has a tensile strength of at least 50 psi, an elongation of at least 600%, a modulus at 30% elongation of not more than 12 psi, a modulus at failure of not more than 20 psi, a shear strength of at least 15 psi and a peel strength of at least 2 pounds per inch.