Claims
- 1. A process for the production of an aromatic thioether ketone/thioether sulfone copolymer, which comprises reacting an alkali metal sulfide with dihalogenated aromatic compounds including a 4,4'-dihalobenzophenone and a 4,4'-dihalodiphenylsulfone in an organic amide solvent containing water under the following conditions (1)-(3):
- (1) the molar ratio of the amount of the charged 4,4'-dihalobenzophenone to the amount of the charged 4,4'-dihalodiphenylsulfone being 98:2-65:35,
- (2) the ratio of the amount of the charged dihalogenated aromatic compounds to the amount of the charged alkali metal sulfide being 0.95-1.2 (mol/mol),
- (3) the reaction being conducted by at least the following two steps:
- in the first step, the alkali metal sulfide and the dihalogenated aromatic compounds being subjected to a polymerization reaction in a temperature range of 60.degree.-260.degree. C. for 0.5-30 hours in the water-containing organic amide solvent in which the ratio of the water content to the amount of the charged organic amide solvent is controlled within a range of 1-20 (mol/kg), and
- in the second step, the ratio of the water content to the amount of the charged organic amide solvent being controlled within a range of 1-20 (mol/kg), and the polymerization reaction mixture being held for 0.1-10 hours in a temperature range of 265.degree.-320.degree. C.
- 2. The process as claimed in claim 1, wherein the amount of the charged alkali metal sulfide is 0.1-5 moles per kg of the amount of the charged organic amide solvent.
- 3. The process as claimed in claim 1, wherein the polymerization reaction in the first step is conducted until a prepolymer having a solution viscosity (.eta..sub.inh) of at least 0.15 dl/g is formed.
- 4. The process as claimed in claim 1, wherein the polymerization reaction in the second step is conducted until the solution viscosity (.eta..sub.inh) of the prepolymer formed in the first step increases by at least 0.05 dl/g.
- 5. The process as claimed in claim 1, wherein oxidizing components in both gaseous phase and liquid phase of the reaction system are eliminated prior to the initiation of the polymerization reaction.
- 6. The process as claimed in claim 1, herein the resulting aromatic thioether ketone/thioether sulfone copolymer is collected in the form of granules having an average particle size within a range of 0.15-3.0 mm, at least 70 weight % of said granules having a particle size of at least 0.1 mm.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-34251 |
Jan 1992 |
JPX |
|
4-101692 |
Mar 1992 |
JPX |
|
4-307908 |
Oct 1992 |
JPX |
|
Parent Case Info
This application is a division of application Ser. No. 08/003,034 filed Jan. 12, 1993, now U.S. Pat. No. 5,369,191.
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Date |
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4895925 |
Satake et al. |
Jan 1990 |
|
5008370 |
Kashiwadate et al. |
Apr 1991 |
|
5120808 |
Satake et al. |
Jun 1992 |
|
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Country |
210377 |
Feb 1987 |
EPX |
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Dec 1991 |
EPX |
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DEX |
62-27434 |
Feb 1987 |
JPX |
64-54031 |
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2-225527 |
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JPX |
Non-Patent Literature Citations (1)
Entry |
Kirk-Othmer "Encyclopedia of Chemical Technology" Third Edition, vol. 6, pp. 798-803. |
Divisions (1)
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Number |
Date |
Country |
Parent |
3034 |
Jan 1993 |
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