Abstract:
A thermoplastic roofing membrane comprising a planar thermoplastic sheet, optionally having more than one layer, where at least one layer of the membrane includes an ethylene-based olefmic block copolymer, and where the sheet is characterized by a storage modulus of less than 450 MPa at 0 °C.
Abstract:
A roof system comprising a substrate and thermoplastic membrane adhered to the substrate, where the thermoplastic membrane is characterized, prior to being adhered to the substrate, by a stiffness represented by a flexural modulus of less than 90 MPa or by a Taber stiffness of less than 15, or by a Shore D hardness of less than 40, or by a combination of a flexural modulus of less than 90 MPa, a Taber stiffness of less than 15, and a Shore D hardness of less than 40.
Abstract:
A method for making a cured rubber sheet, the method comprising providing an uncured rubber sheet, where the uncured rubber sheet includes opposing planar surfaces, applying a curable coating composition to one planar surface of the sheet to form a layer of curable coating composition, subjecting the curable coating composition to curing conditions that cure the coating composition and thereby form a cured coating layer on the uncured rubber sheet, rolling the uncured rubber sheet having a cured coating layer onto itself to form a roll, and subjecting the roll to curing conditions that cure the uncured rubber sheet and thereby forms a roll of cured rubber sheet.
Abstract:
A method of continuously manufacturing a cured membrane includes continuously compounding and mixing a vulcanizable rubber composition in a mixing extruder while continuously removing gasses from the vulcanizable rubber composition during mixing with a vacuum. The vulcanizable rubber composition may be continuously extruded to form an extrudate, which may be continuously calendered to form a green membrane. The green membrane may be continuously cured, such as by a hot air conveyor curing system, to form a cured membrane.
Abstract:
A method of preparing an EPDM roofing membrane panel, the method comprising preparing a vulcanizable composition including expandable graphite by mixing an EPDM rubber and expandable graphite, forming a sheet from said vulcanizable composition, preparing a green membrane panel using said sheet, and curing said green membrane panel to form the EPDM roofing membrane panel, where said steps of preparing a vulcanizable composition, said step of forming a sheet, said step of preparing a green membrane, an said step of curing each include a peak temperature at which each of said steps respectively take place, and where the expandable graphite has an onset temperature above said peak temperature of each respective step.
Abstract:
An adhered roofing system comprising a roof substrate, a thermoplastic membrane including at least one layer that includes a functionalized thermoplastic polymer, and an adhesive securing the membrane to the substrate, where the adhesive includes a cured residue of a polymer having a silicon-containing hydrolyzable terminal group.
Abstract:
A polyolefin-based roofing membrane comprising a planar thermoplastic sheet, optionally having more than one layer, where at least one layer of the membrane includes a polyolefin thermoplastic resin having a blend of magnesium hydroxide and calcium carbonate dispersed therein.
Abstract:
A membrane composite comprising a polymeric membrane panel, an adhesive layer, where the adhesive layer is a pressure-sensitive adhesive that is at least partially cured, expandable graphite, and a release member.
Abstract:
A membrane composite comprising an olefinic membrane core having first and second planar surfaces, a first silicone coating layer disposed on the first planar surface, and a second silicone coating layer disposed on the second planar surface.