US 12,220,898 B2
Thermoplastic roofing membranes adapted for adhesion to polar adhesives
Hao Wang, Carmel, IN (US); and Donna C. Tippmann, Fishers, IN (US)
Assigned to Holcim Technology Ltd, Zug (CH)
Appl. No. 17/266,277
Filed by Firestone Building Products Company, LLC, Nashville, TN (US)
PCT Filed Aug. 7, 2019, PCT No. PCT/US2019/045384
§ 371(c)(1), (2) Date Feb. 5, 2021,
PCT Pub. No. WO2020/033462, PCT Pub. Date Feb. 13, 2020.
Claims priority of provisional application 62/716,043, filed on Aug. 8, 2018.
Prior Publication US 2021/0300007 A1, Sep. 30, 2021
Int. Cl. B24B 1/00 (2006.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/15 (2019.01); B29C 48/21 (2019.01); B29C 48/88 (2019.01); B32B 7/12 (2006.01); B32B 27/12 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); B32B 37/15 (2006.01); B32B 37/20 (2006.01); B32B 38/00 (2006.01); C08K 3/26 (2006.01); C09J 175/04 (2006.01); E04D 5/10 (2006.01); E04D 5/14 (2006.01); B29K 23/00 (2006.01); B29K 101/12 (2006.01); B29K 509/00 (2006.01); B29K 509/02 (2006.01); B29L 31/10 (2006.01)
CPC B32B 27/20 (2013.01) [B29C 48/001 (2019.02); B29C 48/0021 (2019.02); B29C 48/022 (2019.02); B29C 48/08 (2019.02); B29C 48/9135 (2019.02); B32B 7/12 (2013.01); B32B 27/12 (2013.01); B32B 27/32 (2013.01); B32B 37/153 (2013.01); B32B 37/203 (2013.01); B32B 37/206 (2013.01); B32B 38/0012 (2013.01); C08K 3/26 (2013.01); C09J 175/04 (2013.01); E04D 5/10 (2013.01); E04D 5/148 (2013.01); B29K 2023/06 (2013.01); B29K 2023/08 (2013.01); B29K 2023/10 (2013.01); B29K 2023/14 (2013.01); B29K 2101/12 (2013.01); B29K 2509/00 (2013.01); B29K 2509/02 (2013.01); B29L 2031/108 (2013.01); B32B 2038/0016 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2264/104 (2013.01); B32B 2419/06 (2013.01); C08K 2003/265 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of preparing a thermoplastic roofing membrane, the method comprising:
(i) extruding a first composition including a thermoplastic polymer and a first mineral filler to form a first extrudate;
(ii) extruding a second composition including a second thermoplastic polymer and a second mineral filler to form a second extrudate;
(iii) forming the first and second extrudates into first and second sheets, each having first and second planar surfaces;
(iv) positioning a reinforcing fabric between the first and second sheets;
(v) laminating the first sheet to the second sheet to thereby sandwich the reinforcing fabric between the sheets to thereby form a laminate sheet, where the second planar surface of the first sheet and the first planar surface of the second sheet contact the reinforcing fabric;
(vi) allowing the laminate sheet to at least partially cool; and
(vii) mechanically treating the first planar surface of the first sheet to thereby expose the first mineral filler.