Patent ID: 11939445
Assignee: DDP SPECIALTY ELECTRONIC MATERIALS US 9, LLC
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 8:
9. An extruded polymer foam comprising a masterbatch composition, the masterbatch composition 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 a water soluble pH moderator, based on 100 parts of (a) base resin plus (e) water soluble pH moderator.