Polymer, flame-retardant composition, and method of producing polymer
A polymer having a structural unit represented by the following general formula (I), a flame-retardant composition comprising the polymer, and a method for producing the polymer. In the general formula (I), R 1 represents any one selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, and an aralkyl group having 7 to 18 carbon atoms; R 2 represents a hydrogen atom or a methyl group; R 3 and R 4 each independently represent any one selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, an alkyloxy group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkenyloxy group having 2 to 6 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an aralkyloxy group having 7 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aryloxy group having 6 to 12 carbon atoms, and R 3 and R 4 may be bonded to each other; and n is an integer of 0 to 5.
1 . A polymer comprising a structural unit represented by the following general formula (I):
wherein, R 1 represents a methyl group; R 2 represents a hydrogen atom or a methyl group; R 3 and R 4 each independently represent any one selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, an alkyloxy group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkenyloxy group having 2 to 6 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an aralkyloxy group having 7 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aryloxy group having 6 to 12 carbon atoms, and R 3 and R 4 may be bonded to each other; and n is 1.
2 . A compound represented by the following general formula (II):
wherein, R 21 represents a methyl group; R 22 represents a hydrogen atom or a methyl group; R 23 and R 24 each independently represent any one selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, an alkyloxy group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkenyloxy group having 2 to 6 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an aralkyloxy group having 7 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aryloxy group having 6 to 12 carbon atoms, and R 23 and R 24 may be bonded to each other; and p is 1.
3 . A flame-retardant composition comprising the polymer according to claim 1 .
4 . A flame-retardant sheet or flame-retardant plate obtained by using the polymer according to claim 1 .
5 . A method for producing a polymer, comprising
polymerizing a compound (A1) represented by the following general formula (III) and a polymerizable monomer (B) in the presence of at least one phosphorous acid-based ester compound (C) selected from the group consisting of a phosphinous acid ester compound, a phosphonous acid monoester compound, and a phosphorous acid diester compound:
wherein, R 31 represents a methyl group, R 32 represents a hydrogen atom or a methyl group, and q is 1.
6 . The method for producing a polymer according to claim 5 , wherein an addition amount of the phosphorous acid-based ester compound (C) is 40 to 160 mol % with respect to 100 mol % of the compound (A1).
7 . A composition comprising a compound (A1) represented by the following general formula (III), a polymerizable monomer (B), and at least one phosphorous acid-based ester compound (C) selected from the group consisting of a phosphinous acid ester compound, a phosphonous acid monoester compound, and a phosphorous acid diester compound:
wherein, R 31 represents a methyl group, R 32 represents a hydrogen atom or a methyl group, and q is 1.
8 . The composition according to claim 7 , wherein a content of the phosphorous acid-based ester compound (C) is 40 to 160 mol % with respect to 100 mol % of the compound (A1).