Reaction #1869146

ord-00c4384d6b5048e79b0f47e3215b50a5

Reaction equation

O=c1oc(=O)c2cc3c(=O)oc(=O)c3cc12
PMDA
O=C(O)CCCc1ccc2cc3ccccc3cc2c1
4-ABA
→
O=C(O)CCCc1ccc2cc3ccccc3cc2c1.O=c1oc(=O)c2cc3c(=O)oc(=O)c3cc12
PMDA 4-ABA

Reactants

O=c1oc(=O)c2cc3c(=O)oc(=O)c3cc12
PMDA
O=C(O)CCCc1ccc2cc3ccccc3cc2c1
4-ABA

Reagents

None

Solvents

CN1CCCC1=O
NMP
CN1CCCC1=O
NMP

Conditions

Detailed conditions
See reaction.notes.procedure_details.

Workup

  1. 1
    Otherto prepare a polyamic acid solution
  2. 2
    OtherThe polymerization reaction
  3. 3
    Otheruniformly, and the molecular weights were measured in the same manner as in Preparation Example 1 and as a result
  4. 4
    Othera weight average molecular weight of 12,695 was obtained
  5. 5
    Concentrationthe BCS concentration
  6. 6
    Otherto prepare a liquid crystal aligning agent

Procedure

20.94 g (0.096 mol) of PMDA, 11.00 g (0.09 mol) of 4-ABA and 3.49 g (0.01 mol) of DAHOB were reacted in 201 g of NMP at room temperature for 5 hours to prepare a polyamic acid solution. The polymerization reaction proceeded easily and uniformly, and the molecular weights were measured in the same manner as in Preparation Example 1 and as a result, a solution of a polyamic acid having a number average molecular weight of 7,038 and a weight average molecular weight of 12,695 was obtained. Further, to this solution, poor solvents BCS and NMP were added so that the polyamic acid concentration would be 5 mass % and the BCS concentration would be 20 mass % to prepare a liquid crystal aligning agent.

Source

DOI: 10.6084/m9.figshare.5104873.v1Patent: US07498068B2uspto-grants-2009_03