Claims
- 1. A process for the production of an amorphous thermoplastic polymer containing units of formula: ##STR19## wherein the ratio of unit (I) to unit (II) is greater than (I); said units (I) and (II) being attached to each other by an --O-- bond, comprising reacting under substantially anhydrous conditions bisphenol A, dichlorodiphenyl sulfone dihydroxydiphenyl sulfone, in an aprotic solvent in the presence of alkali metal carbonate, wherein the ratio of the concentration of OH groups to halo groups is from about 0.90 to about 1.10.
- 2. A process for the production of an amorphous thermoplastic polymer containing units of formula: ##STR20## wherein the ratio of unit (I) to unit (II) is greater than (I); said units (I) and (II) being attached to each other by an --O-- bond, comprising reacting under substantially anhydrous condition bisphenol A, dichlorodiphenyl sulfone dihydroxydiphenyl sulfone, in an aprotic solvent in the presence of alkali metal carbonate, wherein the ratio of the concentration of OH groups to halo groups is from about 0.90 to about 1.10, and said bisphenol A comprises at least 10 mole percent of bisphenol A and dihydroxydiphenyl sulfone.
- 3. A process for the production of an amorphous thermoplastic polymer containing units of formula: ##STR21## wherein the ratio of unit (I) to unit (II) is greater than (I); said units (I) and (II) being attached to each other by an --O-- bond, comprising reacting under substantially anhydrous conditions bisphenol A, dichlorodiphenyl sulfone, dihydroxydiphenyl sulfone, in a solvent mixture comprising a solvent which forms an azeotrope with water and a polar aprotic solvent in the present of alkali metal carbonate, wherein the ratio of the concentration of OH groups to halo groups is from about 0.90 to about 1.10.
Parent Case Info
This is a continuation of application Ser. No. 854,683, filed 18 Apr. 1986, which is a continuation of Ser. No. 452,454, filed on 23 Dec. 1982, no abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4108837 |
Johnson et al. |
Aug 1978 |
|
4175175 |
Johnson et al. |
Nov 1979 |
|
4256862 |
Binsack et al. |
Mar 1981 |
|
4358569 |
Quinn et al. |
Nov 1982 |
|
Continuations (2)
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Number |
Date |
Country |
Parent |
854683 |
Apr 1986 |
|
Parent |
452454 |
Dec 1982 |
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