Patent ID: 11865374
Assignee: EVONIK OPERATIONS GMBH
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  C | IPC A  C

Claim 4:
5. A process for preparing a polymer of claim 1, comprising:
A) providing a monomer (1) of general formula (II) and a monomer (2) of general formula (III), with
R1A=independently from each other selected from the group consisting of alkyl radicals and alkenyl radicals, which both may be branched or straight chained, unsubstituted or substituted, R2A=independently from each other selected from the group consisting of hydroxyl substituted hydrocarbyl radicals,
R3A and R4A=independently from each other selected from the group consisting of H and methyl, and
with
at least 90 wt.-% of all R1A are selected from the group of alkyl and alkenyl radicals with from 6 to 32, carbon atoms, with the wt.-% referring to the sum of all R1A present in the polymer, and a weight ratio of monomer (1) to monomer (2) in the range of from 1:100 to 1:0.5,
B) addition of at least one initiator to polymerize the monomers and performing a radical polymerization, optionally
C) removal of excess of monomers, and, optionally,
D) purification of the obtained polymer, wherein the initiator is added in an amount of from 5 to 20,000 ppm, wherein the ppm refers to the total weight of the sum of all monomers (1) and (2) provided in process step A).