US 12,122,887 B2
Fiber-reinforced propylene polymer composition
David W. Eastep, Winona, MN (US); and Aaron H. Johnson, Winona, MN (US)
Assigned to Ticona LLC, Florence, KY (US)
Filed by Ticona LLC, Florence, KY (US)
Filed on Dec. 7, 2021, as Appl. No. 17/543,803.
Claims priority of provisional application 63/171,608, filed on Apr. 7, 2021.
Claims priority of provisional application 63/126,602, filed on Dec. 17, 2020.
Prior Publication US 2022/0195132 A1, Jun. 23, 2022
Int. Cl. C08J 5/04 (2006.01); C08K 5/00 (2006.01); C08K 5/34 (2006.01); C08K 5/3492 (2006.01); C08K 5/53 (2006.01); C08K 5/5313 (2006.01); C08K 7/14 (2006.01); C08L 23/12 (2006.01)
CPC C08J 5/043 (2013.01) [C08K 5/005 (2013.01); C08K 5/0066 (2013.01); C08K 5/34922 (2013.01); C08K 5/5313 (2013.01); C08K 7/14 (2013.01); C08L 23/12 (2013.01); C08J 2323/12 (2013.01); C08K 2201/004 (2013.01); C08K 2201/019 (2013.01); C08L 2201/02 (2013.01); C08L 2203/206 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A fiber-reinforced polymer composition comprising:
from about 60 wt. % to about 90 wt. % of a polymer matrix that contains propylene polymer, wherein the propylene polymer comprises 30 wt. % to 65 wt. % of the fiber-reinforced polymer composition;
from about 10 wt. % to about 40 wt. % of a plurality of long reinforcing fibers having a length of from about 1 to about 25 millimeters that are distributed within the polymer matrix, wherein the polymer composition exhibits a dielectric constant of about 4 or less and dissipation factor of about 0.01 or less at a frequency of 2 GHz, and further wherein the polymer composition exhibits a Charpy unnotched impact strength of about 20 KJ/m2 or more as determined in accordance with ISO Test No. 179-1:2010 at a temperature of about 23° C., and a Limiting Oxygen Index of about 25 or more as determined in accordance with ISO 4589:2017.