US 11,939,445 B2
Flame retardant masterbatch composition for foams containing a pH moderator
Wenyi Huang, Midland, MI (US); Shari Kram, Sanford, MI (US); Mark Rickard, Midland, MI (US); and Ravi B Shankar, Midland, MI (US)
Assigned to DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US)
Filed by DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US)
Filed on Nov. 1, 2021, as Appl. No. 17/516,016.
Claims priority of provisional application 63/119,883, filed on Dec. 1, 2020.
Prior Publication US 2022/0169813 A1, Jun. 2, 2022
Int. Cl. C08J 3/22 (2006.01); C08J 3/20 (2006.01); C08J 9/00 (2006.01); C08J 9/12 (2006.01); C08J 9/14 (2006.01); C08L 25/06 (2006.01)
CPC C08J 9/0061 (2013.01) [C08J 3/201 (2013.01); C08J 3/226 (2013.01); C08J 9/0095 (2013.01); C08J 9/122 (2013.01); C08J 9/125 (2013.01); C08J 9/146 (2013.01); C08L 25/06 (2013.01); C08J 2201/03 (2013.01); C08J 2203/06 (2013.01); C08J 2203/10 (2013.01); C08J 2203/142 (2013.01); C08J 2363/04 (2013.01); C08J 2425/06 (2013.01); C08L 2201/02 (2013.01); C08L 2203/14 (2013.01)] 16 Claims
 
1. A masterbatch composition suitable for use as a flame retardant in extruded polymer foams, comprising:
(a) 20 to 40 parts by weight base resin comprising styrene homopolymer or copolymer;
(b) 1 to 16 parts by weight acid scavenger comprising an epoxy-based compound;
(c) 2 to 6 parts by weight antioxidant comprising an alkyl or aryl phosphite; and
(d) 45 to 60 parts by weight flame retardant comprising a non-hexabromocyclododecane (HBCD) brominated polymer or copolymer;
wherein the amounts of (a), (b), (c), and (d) total 100 parts by weight;
the masterbatch composition further comprising
(e) 0.6 to 10 parts by weight of water soluble pH moderator, based on 100 parts of base resin plus the at least one water soluble pH moderator.