Method for producing polymer using monomer having piperidine skeleton, and molded body
View Patent ↗Disclosed are a method for producing a polymer by a polymerization of a mixture at a temperature of 210° C. or lower, wherein the mixture comprises 0.01 to 35 mol % of a monomer or a polymer thereof which has a piperidine skeleton represented by formula (1), and a molded body thereof. R 1 represents a hydrogen atom or a methyl group, X represents an oxygen atom, an imino group, or a specific oxygen atom containing a hydrocarbon group, and R 2 and R 3 represent a hydrogen atom, a linear alkyl group with C1 to C8, a branched alkyl group with C1 to C8, an alicyclic hydrocarbon with C6 to C8, or an aryl group, wherein R 2 and R 3 may also form a cyclic structure.
1. A method for producing a polymer, the method comprising:
polymerizing, at a temperature of 210° C. or lower, a mixture comprising:
a monomer (a1), and
a monomer component (a2) comprising at least 50 wt % of methyl methacrylate, to obtain a first polymer; and then,
polymerizing, at a temperature of 210° C. or lower, a second mixture comprising the first polymer and a further monomer component (a2′) comprising at least 50 wt % of methyl methacrylate, wherein the second mixture comprises from 0.01 to 35 mol % of the monomer (a1), which has formula (1):
wherein, R 1 is a hydrogen atom or a methyl group,
X is an oxygen atom, an imino group, a group having formula (2), or a group having formula (3):
wherein, in formula (2), n is an integer of 1 to 10, and R 4 and R 5 are each independently a hydrogen atom or a methyl group, with the proviso that at least one of R 4 and R 5 is a hydrogen atom,
wherein, in formula (3), n is an integer of 1 to 10,
R 2 and R 3 are each independently a hydrogen atom, a linear alkyl group with a carbon number of 1 to 8, a branched alkyl group with a carbon number of 1 to 8, an optionally substituted alicyclic hydrocarbon with a carbon number of 6 to 8, or R 2 and R 3 together form an optionally substituted cyclic structure.
2. The method of claim 1 , wherein the polymerization of the mixture is cast polymerization.
3. The method of claim 1 , wherein, in formula (1), R 1 is a hydrogen atom.
4. A method for producing a polymer, the method comprising:
polymerizing at a temperature of 210° C. or lower, a monomer mixture comprising:
from 0.01 to 35 mol % of a monomer (a1) of formula (1); and
from 65 to 99.99 mol % of a monomer component (a2) comprising 50 wt % or more of methyl methacrylate,
wherein the monomer (a1) has formula (1):
wherein, in formula (1):
R 1 is a hydrogen atom or a methyl group;
X is a group having formula (2):
wherein, in formula (2):
n is an integer of 1 to 10; and
R 4 and R 5 are each independently a hydrogen atom or a methyl group, with the proviso that at least one of R 4 and R 5 is a hydrogen atom; and
R 2 and R 3 are each independently a hydrogen atom, a linear alkyl group with a carbon number of 1 to 8, a branched alkyl group with a carbon number of 1 to 8, an optionally substituted alicyclic hydrocarbon with a carbon number of 6 to 8, or R 2 and R 3 together form an optionally substituted cyclic structure.
5. A method for producing a polymer, the method comprising:
polymerizing at a temperature of 210° C. or lower, a monomer mixture comprising:
from 0.01 to 35 mol % of a monomer (a1) of formula (1); and
from 65 to 99.99 mol % of a monomer component (a2) comprising 50 wt % or more of methyl methacrylate,
wherein the monomer (a1) has formula (1):
wherein, in formula (1):
R 1 is a hydrogen atom or a methyl group;
X is a group having formula (3):
wherein n is an integer of 1 to 10; and
R 2 and R 3 are each independently a hydrogen atom, a linear alkyl group with a carbon number of 1 to 8, a branched alkyl group with a carbon number of 1 to 8, an optionally substituted alicyclic hydrocarbon with a carbon number of 6 to 8, or R 2 and R 3 together form an optionally substituted cyclic structure.