Pressure sensitive tape for forming water-tight field joints in rubber membranes
OwnerDaniel John Cotsakis, Ronald Lynn Senderling +1inventors
InventorsDaniel John Cotsakis, Ronald Lynn Senderling, Nicholas John Shears
Life of this patent
Estimating the term…
Abstract
An improved adhesive roofing tape is based on a combination of brominated butyl rubber and EPDM. A non-diene block terpolymer is interspersed in the cross-liked polymer network. A plasticizer, a phenolic tackifier, a high melting point non-phenolic tackifier and a low melting point non-phenolic tackifier are included to provide resiliency and permanent tack at low temperatures. A method of making the adhesive roofing tape is also provided.
Claims14
A pressure sensitive roofing tape for use in forming water-tight field joints in roofing membranes, comprising:
- brominated isoprene isobutylene copolymer;
- ethylene propylene diene terpolymer;
- styrene ethylene-butylene block terpolymer;
- polyisobutylene plasticizer;
- thermoplastic phenolic resin tackifier;
- high melting point thermoplastic non-phenolic hydrocarbon resin tackifier;
- low melting point thermoplastic non-phenolic hydrocarbon resin tackifier;
- and
- peroxide curing agent.
A pressure sensitive tape for use in forming water-tight joints in membranes, comprising:
- from about 11 to about 29 percent by weight halogenated isoprene isobutylene copolymer;
- from about 6 to about 22 percent by weight ethylene propylene diene terpolymer;
- from about 1 to about 8 percent by weight non-diene block terpolymer;
- from about 40 to about 50 percent by weight plasticizer from about 6 to about 15 percent by weight phenolic tackifier;
- from about 6 to about 15 percent by weight high melting point non-phenolic tackifier;
- from about 3 to about 12 percent by weight low melting point non-phenolic tackifier;
- and
- from about 0.3 to about 0.5 percent by weight peroxide curing agent, wherein said halogen of said halogenated isoprene isobutylene copolymer is effective in protecting the isoprene groups of said halogenated isoprene isobutylene copolymer to reduce the rate of breakdown by said curing agent, and wherein said curing agent has the capacity to depolymerize said plasticizer and said halogenated isoprene isobutylene copolymer and is effective to depolymerize said plasticizer at a rate more rapid than the rate of depolymerization of said halogenated isoprene isobutylene copolymer by said curing agent.
Dependencies are inferred from the claim text.