US 12,305,020 B2
Flame retardant and stabilizer combined for use with thermoplastics
Qingliang He, Cheshire, CT (US)
Assigned to LANXESS Corporation, Pittsburgh, PA (US)
Appl. No. 18/010,268
Filed by LANXESS Corporation, Pittsburgh, PA (US)
PCT Filed Jun. 16, 2021, PCT No. PCT/US2021/037716
§ 371(c)(1), (2) Date Dec. 14, 2022,
PCT Pub. No. WO2021/257756, PCT Pub. Date Dec. 23, 2021.
Claims priority of provisional application 63/040,489, filed on Jun. 17, 2020.
Prior Publication US 2023/0227630 A1, Jul. 20, 2023
Int. Cl. C08K 5/5317 (2006.01); C08K 5/1515 (2006.01); C09K 21/12 (2006.01)
CPC C08K 5/5317 (2013.01) [C08K 5/1515 (2013.01); C09K 21/12 (2013.01)] 20 Claims
 
1. A flame retardant and stabilizer additive composition, for thermoplastic polymers, comprising
(A) at least one phosphorus-containing flame retardant of empirical formula (I):

OG Complex Work Unit Chemistry
 wherein R is H, an alkyl, aryl, alkylaryl, or arylalkyl group, M is a metal and y is 2 or 3, such that M(+)y is a metal cation where (+)y represents the charge formally assigned to the cation, a, b, and c represent the ratio of the components to which they correspond relative to one another in the compound, and satisfy the charge-balance equation 2(a)+c=b(y), and c is not zero, and
(B) at least one epoxide compound.