US 12,312,530 B2
Fire retarding composition for use in wood composite panels
Helmut Wiehn, Heuchelheim-Klingen (DE); Barbora Deppe, Offenburg (DE); Herman Meynaerts, Rillaar (BE); and Pieter Daeseleire, Reet (BE)
Assigned to ECOCHEM INTERNATIONAL NV, Olen (BE)
Filed by ECOCHEM INTERNATIONAL NV, Olen (BE)
Filed on Mar. 23, 2023, as Appl. No. 18/189,012.
Application 18/189,012 is a continuation of application No. 16/473,686, granted, now 11,613,703, previously published as PCT/EP2018/050056, filed on Jan. 2, 2018.
Claims priority of application No. 2016-5996 (BE), filed on Dec. 30, 2016; and application No. 2017-5166 (BE), filed on Mar. 17, 2017.
Prior Publication US 2023/0227725 A1, Jul. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 21/04 (2006.01); D21J 1/08 (2006.01)
CPC C09K 21/04 (2013.01) [D21J 1/08 (2013.01)] 22 Claims
 
1. A fire retardant composition for use in wood composite panels, whereby said composition is an intumescent formulation comprising:
at least one fire retardant agent chosen from monoammonium dihydrogen phosphate (MAP); di-ammonium hydrogen phosphate (DAP); ammonium polyphosphate; melamine phosphate; melamine polyphosphate; ammonium sulfate; ammonium chloride; ammonium sulfamate; guanidine phosphate; guanidine hydrogen phosphate; guanidine sulfamate; methylene urea; urea phosphate; alkaline earth phosphates; and any combinations thereof, whereby a total concentration of said fire retardant agent in the composition is 25-98% by dry weight of said composition,
one or more guanidinium-based spumific agents,
optionally at least one smoke suppressing agent, whereby a total concentration of smoke suppressing agents is 0-25% by dry weight of said composition; and
a pH regulating compound,
characterized in that a pH of a 10% aqueous solution of said composition is 4.0-6.0, and dry weight of all components of the composition totals 100%.