Acetic Anhydride → Acetic Anhydride

HRID 2065390Notes

Reaction equation

HRID 2065390 reaction equation
[CH:1]1[C:6](C2C=C[C:10]3[C:13]([O:15][C:16](=[O:17])[C:9]=3C=2)=[O:14])=[CH:5][C:4]2C(OC(=O)[C:3]=2[CH:2]=1)=O.C(OC(=O)C)(=O)C.CC([N:33](C)C)=O>>[C:13]([O:15][C:16](=[O:17])[CH3:9])(=[O:14])[CH3:10].[N:33]1[CH:6]=[CH:1][CH:2]=[CH:3][C:4]=1[CH3:5]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 31374Dimethylacetamide3×HCID 754945,5'-Bi-2-benzofuran-1,1',3,3'-tetrone

Product 2

HCID 7918Acetic AnhydrideHCID 79752-Methylpyridine

Procedure

Under ambient temperature, nitrogen gas is fed into a 500-ml three-necked flask polymerization vessel. All reactions are performed under a nitrogen environment. About 160 g of DMAC used as solvent is added into the flask. About 18.77 g (0.059 mole) of TMFB are dissolved into the DMAC. After the TMFB is completely dissolved in the DMAC solvent, about 13.35 g (0.045 moles) of BPDA and about 7.87 g (0.015 moles) of BPADA are added into the liquid solution, which is then continuously agitated for about 4 hours for forming a PAA solution with a viscosity of about 150,000 cP. The PAA solution is mixed with a dehydrant acetic anhydride and a catalyst picoline with a PAA:acetic anhydride:picoline molar ratio of about 1:2:1 to obtain a precursor solution. A polyimide film is casted in the same manner as Example 1.

Workup

  1. customUnder ambient temperature, nitrogen gas is fed into a 500-ml three-necked flask polymerization vessel
  2. additionis added into the flask
  3. additionare added into the liquid solution, which
  4. customfor forming a PAA solution with a viscosity of about 150,000 cP

Sources & evidence

ORD record
ord-8a25f7896bf34d12a245013ff4a59995
Source dataset
uspto-grants-2012_10
Patent number
US08288471B2

Reaction notes

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