# US 2018/0023301 A1 · Thermoplastic roofing membranes for fully-adhered roofing systems

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- Number: US 2018/0023301 A1
- Document ID: US20180023301A1
- Status: Published application
- Kind: A1
- Application number: 15/548,912
- Filed: 2016-02-08
- Published: 2018-01-25
- Earliest claimed: 2015-02-06
- Assignees: Firestone Building Products Company, LLC
- Applicants: Firestone Building Products Co., LLC
- Inventors: Hao WANG; Michael John HUBBARD; Dwayne WACENSKE; Donna C. TIPPMANN
- Web page: https://patentgrep.com/patent/US20180023301A1

## CPC

- E04D 5/06: by making use of plastics
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/40: comprising polyurethanes
- E04D 5/10: by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
- E04D 11/02: Build-up roofs, i.e. consisting of two or more layers bonded together in situ, at least one of the layers being of watertight composition (gravelling of flat roofs E04D7/00; venting or ventilation E04D13/17)
- B32B 2323/04: Polyethylene
- B32B 2323/046: LDPE, i.e. low density polyethylene
- B32B 2419/06: Roofs, roof membranes
- E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## 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 olefinic block copolymer, and where the sheet is characterized by a storage modulus of less than 450 MPa at 0° C.

## Claims

### Claim 1

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 olefinic block copolymer, and where the sheet is characterized by a storage modulus of less than 450 MPa at 0° C.

### Claim 2 (depends on 1)

The roofing membrane of claim 1, where the membrane is a bilaminate membrane including upper and lower layers.

### Claim 3 (depends on 1)

The roofing membrane of claim 1, where the at least one layer of the membrane including an ethylene-based olefinic block copolymer includes a first ethylene-based olefinic block copolymer having a melt index of less than 5 g/10 min and a second ethylene-based olefinic block copolymer having a melt flow rate of greater than 5 g/10 min.

### Claim 4 (depends on 1)

The roofing membrane of claim 1, where the layer including the ethylene-based olefinic block copolymer also includes linear low-density polyethylene.

### Claim 5 (depends on 1)

The roofing membrane of claim 1, where the layer including the ethylene-based olefinic block copolymer also includes mineral filler.

### Claim 6 (depends on 1)

The roofing membrane of claim 1, where the sheet is characterized by a storage modulus of less than 400 MPa at 0° C.

### Claim 7

A roof system comprising:
a substrate and thermoplastic membrane adhered to the substrate, where the thermoplastic membrane includes one or more layers that include an ethylene-based olefinic block copolymer, where the membrane is characterized, prior to being adhered to the substrate, by a storage modulus of less than 450 MPa at 0° C.

### Claim 8 (depends on 7)

The roof system of claim 7, where the substrate is selected from the group consisting of a roof deck, an insulation board, a cover board, and an existing membrane.

### Claim 9 (depends on 7)

The roof system of claim 7, where the thermoplastic membrane includes first and second opposed planar surface with one of the opposed planar surfaces being adhered to the substrate.

### Claim 10 (depends on 7)

The roof system of claim 7, where at least 50% of the at least one planar surface of the membrane is adhered to the substrate.

### Claim 11 (depends on 7)

The roof system of claim 7, where the membrane is adhered to the substrate through a polyurethane adhesive.

### Claim 12 (depends on 7)

The roof system of claim 7, where the membrane is adhered to the substrate through a pressure-sensitive adhesive.