Jan. 10, 2019  53  US 2019/0010119 Al  vacuum. This polymer layer was dissolved in a mixed  solvent of0.45 L of methanol and 0.54 L ofTHF again, and  160 g oftriethylamine and 30 g of water were added thereto.  This was heated to 60°  C. to perform deprotection reaction  for 40 hours. This deprotected reaction solution was con› centrated in vacuum, and 548 g of methanol and 112 g of  acetone were added to the concentrated liquid to be solution.  With stirring, 990 g of hexane was added dropwise. After  finishing the dropwise addition, this was placed for 30  minutes, allowing to separate to two layers. To the under  layer (polymer layer), 300 g of THF was added, and 1,030  g of hexane was added dropwise with stirring. The under  layer (polymer layer) was concentrated in vacuum after 30  minutes. The obtained polymer solution was neutralized  using 82 g of acetic acid, and the solution was concentrated.  Then, this was dissolved in 0.3 L of acetone, followed by  addition of 10 L of water to precipitate. This was filtered off  and dried to give 280 g of white polymer. The obtained  polymer was subjected to $^{1}$H-NMR and GPC measurements  to reveal that this was a polymer with a copolymerization  ratio of hydroxystyrene:acenaphthylene=89.3:10.7, Mw of  5,000, and Mw/Mn of 1.63.  [0239]  Under acid conditions, 100 g of the obtained poly› mer was allowed to react with 50 g of (2-methyl-1-propenyl)  methyl ether, followed by neutralization, liquid separation  treatment, and precipitation step to give a polymer- I. The  yield was 125 g.  [0240]  In the same way as in Synthesis Example 2-1  except for changing the kinds of each monomer and incor› poration ratio (molar ratio), Polymers-2 to 8 were synthe› sized.  [0241]  The structures of Polymers-I to 8 are shown below.  [Synthesis Examples 2-2 to 2-8] Synthesis of  Polymers-2 to  -continued  Polymer-2  OH  Polymer-3  OH  Polymer-4  OH  Polymer-!  OH  (a~ 0.69, b  ~  0.10, c  ~  0.21, Mw  ~  4,000)  (a~ 0.76, b  ~  0.12, c  ~  0.12, Mw  ~  5,500)  (a~ 0.78, b  ~  0.11, c  ~  0.11, Mw  ~  5,500)  (a~ 0.76, b  ~  0.11, c  ~  0.13, Mw  ~  5,800) 