초록 ▼

An adhesive roofing tape is based on a combination of brominated butyl rubber and EPDM. A non-diene block terpolymer is interspersed in the cross-linked polymer network. A plasticizer and tackifier are included to provide resiliency and permanent tack. An important aspect of the invention is to use

An adhesive roofing tape is based on a combination of brominated butyl rubber and EPDM. A non-diene block terpolymer is interspersed in the cross-linked polymer network. A plasticizer and tackifier are included to provide resiliency and permanent tack. An important aspect of the invention is to use a high molecular weight polyisobutylene plasticizer and a peroxide curing system. Rapid crosslinking without concomitant rapid degradation of the brominated butyl rubber occurs and some limited degradation of the plasticizer contributes to surface tack. A method of making the adhesive roofing tape is also provided.

대표청구항 ▼

[ What is claimed is:] [1.] A pressure-sensitive, adhesive roofing tape for use in forming water-tight field joints in roofing membranes, comprising:from about 10 to about 35 percent by weight brominated isoprene isobutylene copolymer,from about 5 to about 25 percent by weight ethylene propylene die

[ What is claimed is:] [1.] A pressure-sensitive, adhesive roofing tape for use in forming water-tight field joints in roofing membranes, comprising:from about 10 to about 35 percent by weight brominated isoprene isobutylene copolymer,from about 5 to about 25 percent by weight ethylene propylene diene terpolymer,from about 0 to about 10 percent by weight filler,from about 35 to about 55 percent by weight polyisobutylene plasticizer,from about 2 to about 20 percent by weight thermoplastic phenolic resin tackifier,from about 2 to about 20 percent by weight thermoplastic non-phenolic hydrocarbon resin tackifier, andfrom about 0.2 to about 1.2 percent by weight peroxide curing agent.