CA2058417A1 - Amorphous polymers and process for the production thereof - Google Patents
Amorphous polymers and process for the production thereofInfo
- Publication number
- CA2058417A1 CA2058417A1 CA 2058417 CA2058417A CA2058417A1 CA 2058417 A1 CA2058417 A1 CA 2058417A1 CA 2058417 CA2058417 CA 2058417 CA 2058417 A CA2058417 A CA 2058417A CA 2058417 A1 CA2058417 A1 CA 2058417A1
- Authority
- CA
- Canada
- Prior art keywords
- copolymer
- iii
- producing
- unit represented
- amorphous polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
There are disclosed dibenzofuran amorphous polymer comprising a recurring unit represented by following formula (II) and having a molecular weight giving a reduced viscosity of at least 0.2 dl/g as measured in the form of a 0.5% (W/V) solution in N-methylpyrrolidone at 25°C, a process for producing said amorphous polymer, a dibenzofuran copolymer comprising, in addition to a recurring unit represented by following formula (II), at least one type of recurring unit represented by following general formula (III) in a specific proportion and having a molecular weight giving a reduced viscosity of at least 0.2 dl/g as measured in the form of a 0.5% (W/V) solution in concentrated sulfuric acid at 25°C, and a process for producing said copolymer.
Formula:
(see fig. II) General Formula (III):
(see fig. III) wherein A is -O-, -CO-, -S-, SO2-, a divalent alkylene group or a single bond and n is a number of 0, 1 or 2.
There are also disclosed benzofuran derivatives useful as a starting material and a process for producing said derivatives. The above-mentioned amorphous polymer and copolymer are excellent in stability at the time of molding, low in polarity an low in moisture absorption, so that they are useful as starting materials for the manufacture of molded articles.
Formula:
(see fig. II) General Formula (III):
(see fig. III) wherein A is -O-, -CO-, -S-, SO2-, a divalent alkylene group or a single bond and n is a number of 0, 1 or 2.
There are also disclosed benzofuran derivatives useful as a starting material and a process for producing said derivatives. The above-mentioned amorphous polymer and copolymer are excellent in stability at the time of molding, low in polarity an low in moisture absorption, so that they are useful as starting materials for the manufacture of molded articles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2058417 CA2058417C (en) | 1990-03-16 | 1990-03-16 | Amorphous polymers and process for the production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2058417 CA2058417C (en) | 1990-03-16 | 1990-03-16 | Amorphous polymers and process for the production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2058417A1 true CA2058417A1 (en) | 1991-09-17 |
| CA2058417C CA2058417C (en) | 1997-09-23 |
Family
ID=4148988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2058417 Expired - Fee Related CA2058417C (en) | 1990-03-16 | 1990-03-16 | Amorphous polymers and process for the production thereof |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2058417C (en) |
-
1990
- 1990-03-16 CA CA 2058417 patent/CA2058417C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2058417C (en) | 1997-09-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |