	US 12,215,254 B2
	Honeycomb core splice adhesive with improved fire retardancy
Estelle Huther Ebersohl, Molsheim (FR); and Michel Awkal, Molsheim (FR)
Assigned to Zephyros, Inc., Romeo, MI (US)
Appl. No. 16/979,031
Filed by Zephyros, Inc., Romeo, MI (US)
PCT Filed Mar. 6, 2019, PCT No. PCT/EP2019/055573 § 371(c)(1), (2) Date Sep. 8, 2020, PCT Pub. No. WO2019/170747, PCT Pub. Date Sep. 12, 2019.
Claims priority of application No. 18160786 (EP), filed on Mar. 8, 2018.
Prior Publication US 2021/0054239 A1, Feb. 25, 2021
Int. Cl. C09J 5/08 (2006.01); C04B 38/00 (2006.01); C09J 5/06 (2006.01); C09J 11/04 (2006.01); C09J 11/08 (2006.01); C09J 163/00 (2006.01)

CPC C09J 5/08 (2013.01) [C04B 38/0019 (2013.01); C09J 5/06 (2013.01); C09J 11/04 (2013.01); C09J 11/08 (2013.01); C09J 163/00 (2013.01); C09J 2463/00 (2013.01)]

20 Claims

1. A heat-activatable foamable adhesive comprising

a) a curable polymer;

b) a curing agent for the curable polymer;

c) a blowing agent; and

d) a fire retardant comprising a combination of

(i) an ammonium polyphosphate

(ii) a metal hydroxide; and

e) an anti-sagging agent comprising:

(i) an elastomer comprising a nitrile rubber and/or

(ii) fibers comprising aramid fibers and/or

(iii) clay comprising sepiolite, smectite, or a combination thereof:

wherein the fire retardant does not contain expandable graphite.