US 12,215,233 B2
Polydiorganosiloxane compositions and methods for use thereof in forming wood plastic composites
Jodi Mecca, Midland, MI (US); James Keenihan, Midland, MI (US); Marc-Andre Courtemanche, Midland, MI (US); Keith Bruce, Midland, MI (US); Igor Chorvath, Midland, MI (US); and Sean Gaal, Midland, MI (US)
Assigned to Dow Silicones Corporation, Midland, MI (US)
Filed by Dow Silicones Corporation, Midland, MI (US)
Filed on Oct. 6, 2023, as Appl. No. 18/482,042.
Application 18/482,042 is a continuation of application No. 18/052,711, filed on Nov. 4, 2022, granted, now 11,820,898.
Application 18/052,711 is a continuation of application No. 17/613,144, granted, now 11,859,086, previously published as PCT/US2020/036891, filed on Jun. 10, 2020.
Claims priority of provisional application 62/883,683, filed on Aug. 7, 2019.
Prior Publication US 2024/0026158 A1, Jan. 25, 2024
Int. Cl. C08L 97/02 (2006.01); C08L 23/08 (2006.01)
CPC C08L 97/02 (2013.01) [C08L 23/0869 (2013.01); C08L 2205/03 (2013.01)] 20 Claims
 
1. A composition for preparing a wood plastic composite article, said composition comprising:
40 weight % to 70 weight % of (a) a lignocellulosic-based filler;
29 weight % to 59 weight % of (b) an ethylene-based polymer;
1 weight % to 4 weight % of (c) a trialkyl-siloxy terminated polydialkylsiloxane of formula

OG Complex Work Unit Chemistry
where each R is an independently selected alkyl group of 1 to 18 carbon atoms, and subscript x has a value sufficient to give the polydiorganosiloxane a viscosity of 5,000 mPa·s to 50,000 mPa·s as measured at 25° C. at 0.1 RPM to 50 RPM on a Brookfield Dy-III cone & plate viscometer with #CP-52 spindle; and
0 to 4 weight % of (d) a maleated ethylene-based polymer;
each based on combined weights of starting materials (a), (b), (c), and (d) in said composition.