US 11,926,569 B2
Composite cellulosic products and processes for making and using same
Evgeny Panferov, Simi Valley, CA (US)
Assigned to SIERRACRETE LLC, Simi Valley, CA (US)
Filed by SIERRACRETE LLC, Simi Valley, CA (US)
Filed on Jul. 24, 2023, as Appl. No. 18/357,661.
Application 18/357,661 is a continuation of application No. PCT/US2022/080606, filed on Nov. 29, 2022.
Claims priority of provisional application 63/284,137, filed on Nov. 30, 2021.
Prior Publication US 2023/0365469 A1, Nov. 16, 2023
Int. Cl. C04B 28/32 (2006.01); B27N 1/02 (2006.01); B27N 3/00 (2006.01); C04B 26/06 (2006.01); C04B 26/28 (2006.01)
CPC C04B 28/32 (2013.01) [B27N 1/02 (2013.01); B27N 3/002 (2013.01); C04B 26/06 (2013.01); C04B 26/28 (2013.01)] 20 Claims
 
1. A composite cellulosic product, comprising:
an at least partially cured binder and 0.5 wt % to 5 wt % of a plurality of cellulosic substrates, based on a total weight of the composite cellulosic product, wherein the plurality of cellulosic substrates comprises cellulosic substrates derived from a lignin-containing material subjected to a lignin extraction process, and wherein, prior to curing, the binder comprises a mixture formed by combining:
magnesium oxide,
water, and
magnesium chloride, wherein a weight ratio of the magnesium oxide to the magnesium chloride in the binder is at least 2.2:1 to about 8.5:1, and wherein a weight ratio of the water to the magnesium chloride in the binder is about 1.5:1 to about 4.5:1.