Claims
- 1. A thermoplastic polycarbonate resin consisting of a chain of divalent phenolphthalein radicals mixed with divalent dihydroxyaromatic radicals in the mole ratio range of phenolphthalein to dihydroxyaromatic compound from about 0.05 to about 0.7 wherein the phenolphthalein and dihydroxyaromatic radicals are linearly connected by carbonate ester groups, said resin having a weight average molecular weight range from about 25,000 to about 50,000 as determined by gel permeation chromatography.
- 2. The polycarbonate resin as set forth in claim 1 wherein the mole ratio range is from about 0.12 to about 0.43.
- 3. The polycarbonate resin as set forth in claim 1 wherein the mole ratio range is from about 0.18 to about 0.33.
- 4. The polycarbonate resin as set forth in claim 1 wherein the resin has a molecular weight range from about 30,000 to about 45,000.
- 5. The polycarbonate resin as set forth in claim 1 wherein the dihydroxyaromatic radicals are derived by removing the hydroxyl hydrogens from 4,4'-isopropylidenediphenol.
- 6. The polycarbonate resin as set forth in claim 5 wherein the mole ratio range is from about 0.12 to about 0.43.
- 7. The polycarbonate resin as set forth in claim 5 wherein the mole ratio range is from about 0.18 to about 0.33.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 606,149, filed Aug. 20, 1975 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3036036 |
Howe |
May 1962 |
|
Non-Patent Literature Citations (1)
Entry |
Poly. Sci. USSR A10, O. V. Smirnova et al., 1968, pp. 118-124. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
606149 |
Aug 1975 |
|