US 12,110,375 B2
Compositions and foam compositions containing composite particles, articles, composite particles, and methods
Joshua M. Fishman, Minneapolis, MN (US); Jeffrey P. Kalish, St. Paul, MN (US); Caitlin E. Meree, St. Paul, MN (US); Qin Lin, Woodbury, MN (US); Nicholas K. Lee, Minneapolis, MN (US); Li Yao, Woodbury, MN (US); Rajdeep S. Kalgutkar, Woodbury, MN (US); Duy K. Lehuu, Lake Elmo, MN (US); and David T. Amos, St. Paul, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Aug. 15, 2023, as Appl. No. 18/449,942.
Application 18/449,942 is a division of application No. 17/607,144, previously published as PCT/IB2020/055405, filed on Jun. 9, 2020.
Claims priority of provisional application 62/862,932, filed on Jun. 18, 2019.
Prior Publication US 2023/0383080 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 9/00 (2006.01); B24B 37/24 (2012.01); B32B 5/20 (2006.01); B32B 27/06 (2006.01); B32B 27/40 (2006.01); C08J 9/10 (2006.01); C08L 23/08 (2006.01); C08L 31/04 (2006.01); C08L 53/02 (2006.01); C08L 75/06 (2006.01); C08L 75/08 (2006.01); C08L 79/00 (2006.01)
CPC C08J 9/0061 (2013.01) [B24B 37/24 (2013.01); B32B 5/20 (2013.01); B32B 27/065 (2013.01); B32B 27/40 (2013.01); C08J 9/103 (2013.01); C08J 9/106 (2013.01); C08J 9/108 (2013.01); C08L 23/0853 (2013.01); C08L 31/04 (2013.01); C08L 53/02 (2013.01); C08L 75/06 (2013.01); C08L 75/08 (2013.01); C08L 79/00 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2250/40 (2013.01); B32B 2266/0278 (2013.01); B32B 2266/08 (2013.01); B32B 2274/00 (2013.01); C08J 2201/03 (2013.01); C08J 2203/04 (2013.01); C08J 2205/044 (2013.01); C08J 2205/052 (2013.01); C08J 2323/08 (2013.01); C08J 2331/04 (2013.01); C08J 2353/02 (2013.01); C08J 2375/06 (2013.01); C08J 2375/08 (2013.01); C08J 2377/00 (2013.01); C08L 2203/14 (2013.01); C08L 2312/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A composite particle comprising:
a chemical blowing agent particle encapsulated within a shell including an uncrosslinked thermoplastic material; and a co-encapsulated metal salt of the form MX or M (X)2,
wherein M is zinc, calcium, cadmium, potassium, barium, strontium, magnesium, mercury, titanium, tin, lead, sodium, lithium, or cesium,
wherein X is an organic ligand or an inorganic ligand containing a nitrate, phosphate, phosphite, sulfate, carbonate, oxalic acid, halide, para-toluenesulfonate, tetrafluoroborate, perchlorate, hydroxide, cyanide moiety, or hydrates thereof,
wherein the uncrosslinked thermoplastic material exhibits a complex viscosity of 3,700 Pascal seconds (Pa·s) or greater at a decomposition temperature of the chemical blowing agent particle,
wherein the chemical blowing agent is selected from a diazocompound, a sulfonyl hydrazide, a tetrazole, a nitrosocompound, an acyl sulfonyl hydrazide, hydrazones, thiatriazoles, azides, sulfonyl azides, oxalates, thiatrizene dioxides, isatoic anhydride, or combinations thereof, and
wherein the composite particle is free of liquid hydrocarbon physical blowing agents.