HuagongsheHuagongshe Chemistry Print Report · For research reference only
5,5'-Bi-2-benzofuran-1,1',3,3'-tetrone → Bpda tfmb
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 5,5'-Bi-2-benzofuran-1,1',3,3'-tetrone | HCID 75494 | — |
| Reactant | (1,1'-Biphenyl)-4,4'-diamine, 2,2'-bis(trifluoromethyl)- | HCID 629349 | — |
| Solvent | N-methyl-2-pyrrolidone | HCID 13387 | — |
| Product | Bpda tfmb | HCID 131720099 | — |
Reaction Steps
A solution of polyamic acid was prepared at room temperature by combining 6.893 grams of 6FDA, 1.518 grams of BPDA, 6.608 grams of TFMB and 61.1 grams of NMP with good mixing. The amic acid solution was diluted to 10.9% solids, then cast on a silicon wafer by spin coating, and imidized by a heat treatment up to a maximum temperature of 300° C. to produce a coating having a thickness of 2.1 microns. The refractive index was determined in the same manner as in Example 1 and is reported in Table I.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05649045 |
| Source dataset | uspto-grants-1997_07 |
| ORD ID | ord-dbed9e972a19472fba1f3c23efa6faf6 |
| Source note | uspto-grants-1997_07 |