US 11,718,747 B2
Nanoparticle containing compositions
Kathrin Lehmann, Leverkusen (DE); Sebastian Hessner, Essen (DE); Jan-Pleun Lens, Dover, MA (US); and Xiudong Sun, Weston, MA (US)
Assigned to Evonik Operations GmbH, Essen (DE); and FRX Polymers, Inc., Chelmsford, MA (US)
Appl. No. 15/733,375
Filed by Evonik Operations GmbH, Essen (DE); and FRX Polymers, Inc., Chelmsford, MA (US)
PCT Filed Jan. 14, 2019, PCT No. PCT/EP2019/050807
§ 371(c)(1), (2) Date Jul. 15, 2020,
PCT Pub. No. WO2019/141624, PCT Pub. Date Jul. 25, 2019.
Claims priority of provisional application 62/617,825, filed on Jan. 16, 2018.
Claims priority of application No. 18161903 (EP), filed on Mar. 15, 2018.
Prior Publication US 2020/0339802 A1, Oct. 29, 2020
Int. Cl. C08L 67/02 (2006.01); C09D 7/65 (2018.01); C09D 7/61 (2018.01); C09D 7/40 (2018.01); C08G 79/04 (2006.01); C08J 3/22 (2006.01); C08J 5/18 (2006.01); C08K 3/34 (2006.01); C08L 69/00 (2006.01); C09D 5/18 (2006.01); C09D 167/02 (2006.01); C09D 169/00 (2006.01); C09J 11/04 (2006.01); C09J 11/08 (2006.01); C09J 167/02 (2006.01); C09J 169/00 (2006.01); C09K 21/02 (2006.01); C09K 21/14 (2006.01)
CPC C08L 67/02 (2013.01) [C08G 79/04 (2013.01); C08J 3/226 (2013.01); C08J 5/18 (2013.01); C08K 3/346 (2013.01); C08L 69/00 (2013.01); C09D 5/18 (2013.01); C09D 7/61 (2018.01); C09D 7/65 (2018.01); C09D 7/67 (2018.01); C09D 167/02 (2013.01); C09D 169/00 (2013.01); C09J 11/04 (2013.01); C09J 11/08 (2013.01); C09J 167/02 (2013.01); C09J 169/00 (2013.01); C09K 21/02 (2013.01); C09K 21/14 (2013.01); C08J 2367/02 (2013.01); C08J 2369/00 (2013.01); C08J 2483/04 (2013.01); C08J 2485/02 (2013.01); C08K 2201/005 (2013.01); C08K 2201/011 (2013.01); C08L 2201/02 (2013.01); C08L 2203/12 (2013.01); C08L 2203/14 (2013.01); C08L 2203/16 (2013.01); C08L 2310/00 (2013.01)] 20 Claims
 
1. A flame retardant composition, comprising:
(i) 55 to 92% by weight of at least one phosphonate oligomer or polymer, comprising units of formula (I):

OG Complex Work Unit Chemistry
wherein:
each Ar is independently the same or different aromatic or aromatic containing group;
each R is independently the same or different group selected from C1-20 alkyl, C2-20 alkene, C2-20 alkene, C5-20 cycloalkyl, or C6-20 aryl; and
n is from 3 to 200;
(ii) 1% to 44.5% by weight of nanoparticles based on the weight of flame retardant composition, nanoparticles have a length in at least one dimension of 1 nm to 1000 nm which are selected from the group consisting of attapulgite, bentonite, montmorillonite, boehmite, illite, hydroxyapatite, smectite, kaolinite, dickite, nitrite, sepiolite, hectorite, halloysite and talcum particles, or any combination thereof; and
(iii) 0.5% to 10% by weight of dispersing agent(s) based on the weight of the flame retardant composition.