| CPC C08G 65/4093 (2013.01) [C08J 5/18 (2013.01); C08J 5/244 (2021.05); C08J 5/249 (2021.05); C08K 13/04 (2013.01); C08L 71/126 (2013.01); H05K 1/0366 (2013.01); C08J 2371/12 (2013.01); C08K 3/013 (2018.01); C08K 5/0066 (2013.01); C08K 7/26 (2013.01); C08K 2201/005 (2013.01); C08L 2201/02 (2013.01); C08L 2203/16 (2013.01); H05K 2201/012 (2013.01); H05K 2201/029 (2013.01)] | 36 Claims | 
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               1. A curable composition, comprising: 
              at least one poly(arylene ether) polymer comprising a monomer unit of one of formulas (5)-(9): 
              ![]() in which R1 is H, C1-C10 alkyl, or aryl; each of R2, R3, and R6, independently, is C1-C10 alkyl; each of R4, R5, R7, and R8 is H or C1-C10 alkyl; p is an integer from 0 to 4; q is an integer from 0 to 4; and r is an integer from 0 to 4; 
                at least one phosphorus-containing flame retardant; and 
                at least one radical initiator. 
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