| abstract |
The (meth) acrylic copolymer of the present invention is a copolymer of a monomer mixture containing a phosphorus-based (meth) acrylic monomer represented by the following formula (1) and a monofunctional unsaturated monomer. The (meth) acrylic copolymer has improved refractive index and has excellent flame retardance, transparency, scratch resistance and environment friendliness. [Chemical Formula 1] Wherein R 1 is a hydrogen atom or a methyl group, R 2 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, and R 3 And R 4 are each independently a substituted or unsubstituted cyclic hydrocarbon group having 6 to 20 carbon atoms, m is an integer of 1 to 10, and n is an integer of 0 to 5. |