Claims
- 1. Process for the preparation of high molecular weight polyarylene sulphide having a viscosity of from 0.3.times.10.sup.3 to 5.times.10.sup.6 Pascal units which comprises reacting in the absence of water
- (a) 0-100 mol-% of at least one aromatic dihalogen compound corresponding to the formula ##STR3## and 100-0 mol-% of at least one aromatic dihalogen compound corresponding to the formula ##STR4## wherein X represents halogens in the meta- or para-position to each other and
- R.sup.1, which is identical or different, represents hydrogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl and two groups R.sup.1 in the ortho-position to each other are linked together to form an aromatic or heterocyclic ring and one group R.sup.1 is invariably different from hydrogen and
- (b) 0-5 mol-% based on the sum of components (a) and (b), of an aromatic trihalogen or tetrahalogen compound corresponding to the formula
- ArX.sub.n (III)
- wherein
- Ar represents an aromatic or heterocyclic group,
- X represents chlorine or bromine and
- n represents 3 or 4, and
- (c) alkali metal sulphide alone or together with alkali metal hydroxide, the molar ratio of (a+b):c is within the range of 0.85:1 to 1.15:1, and
- (d) in an organic solvent which is an N-alkyllactam having a boiling point above 200.degree. C.,
- characterized in that the molar ratio of alkali metal sulphide (c) to organic solvent (d) is within the range of 1:2 to 1:15 and the alkali metal sulphide is dehydrated either solvent-free or in a polar organic solvent with or without the aid of an inert H.sub.2 O carrier before addition of the aromatic halogen compounds of formulae I, II or III.
- 2. Process according to claim 1 wherein the reaction temperature is from 170.degree. to 270.degree. C.
- 3. Process according to claim 1 wherein the polar organic solvent is N-methylcaprolactam or N-ethylcaprolactam.
- 4. Process according to claim 1 wherein (d) further comprises, N,N-dialkylcarboxylic acid amide as cosolvent.
- 5. Process according to claim 1 wherein toluene is the inert carrier.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3318401 |
May 1983 |
DEX |
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Parent Case Info
This is a continuation of Ser. No. 608,497 filed May 9, 1984, abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0065689 |
Dec 1982 |
EPX |
0073525 |
Mar 1983 |
EPX |
0086487 |
Aug 1983 |
EPX |
0100536 |
Feb 1984 |
EPX |
1620923 |
May 1970 |
DEX |
Continuations (1)
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Number |
Date |
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Parent |
608497 |
May 1984 |
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