US2015306850A1PendingUtilityA1

Thermoplastic membranes containing expandable graphite

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Assignee: FIRESTONE BUILDING PROD CO LLCPriority: Nov 16, 2012Filed: Nov 18, 2013Published: Oct 29, 2015
Est. expiryNov 16, 2032(~6.3 yrs left)· nominal 20-yr term from priority
Inventors:Michael J. HubbardWensheng ZhouJoseph Carr
B32B 2305/07B32B 2305/08B32B 2307/3065B32B 2264/108B32B 2419/06B32B 5/028B32B 27/18B32B 2307/7242B32B 2305/38E04D 5/10B32B 2307/7246B32B 27/12B32B 27/08Y10T442/10B32B 2260/046B32B 2307/72Y10T428/31909B32B 2260/048B32B 27/065B32B 2274/00B32B 27/327B32B 2264/102B32B 25/14B32B 27/306B32B 9/007B32B 2266/04B32B 2307/5825B32B 2307/54B32B 27/308B32B 27/32E04D 5/08B32B 27/205E04D 5/06
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Claims

Abstract

A multi-layered membrane comprising a first thermoplastic first layer and a second thermoplastic layer, where the second layer includes expandable graphite.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A multi-layered membrane comprising:
 i. a first thermoplastic first layer; and   ii. a second thermoplastic layer, where the second layer includes expandable graphite.   
     
     
         2 . The membrane of  claim 1 , where the membrane further includes a reinforcing scrim. 
     
     
         3 . The membrane of  claim 1 , where the first and second layers are laminated to one another. 
     
     
         4 . The membrane of  claim 1 , where the first layer includes at least two sub-layers that are formed by co-extrusion. 
     
     
         5 . The membrane of  claim 4 , where at least one of the layers formed by co-extrusion includes the expandable graphite. 
     
     
         6 . The membrane of  claim 1 , where the second layer includes at least two sub-layers that are formed by co-extrusion. 
     
     
         7 . The membrane of  claim 6 , where at least one of the layers formed by co-extrusion includes the expandable graphite. 
     
     
         8 . The membrane of  claim 1 , where the second thermoplastic layer includes a thermoplastic polymer, and where the second layer includes at least 5 parts by weight expandable graphite per 100 parts by weight of the thermoplastic polymer. 
     
     
         9 . A multi-layered thermoplastic membrane comprising:
 at least one thermoplastic layer having dispersed therein expandable graphite.   
     
     
         10 . The membrane of  claim 9 , where the at least one layer includes at least 3 percent by weight expandable graphite based on the entire weight of the layer.

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