Process for the production of high molecular weight, optionally branched polyarylene sulphides in polar solvent and lactam
AssigneeBayer Aktiengesellschaft
InventorsKarsten Idel, Edgar Ostlinning, Dieter Freitag
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Abstract
The invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulfides from alkali sulfides and aromatic dihalogen compounds, in which the reaction is carried out in a polar solvent, such as an N-alkyl lactam, containing from 0.5 to 100 mole %, based on the moles of aromatic dihalogen compound, of a lactam.
Claims21
A process for the production of high molecular weight polyarylene sulphide or branched polyarylene sulphide which comprises reacting a mixture of components consisting essentially of:
- (a) 50 to 100 mole % of an aromatic dihalogen compound corresponding to the following formula:
- ##STR3## and 0 to 50 mole % of an aromatic dihalogen compound corresponding to the following formula:
- ##STR4## in which X are halogen atoms in the meta- or para- position to one another;
- and each
- R.sup.1 is independently hydrogen, alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl, or two groups R.sup.1 in the orthoposition to one another attached together to form an aromatic or a nitrogen, oxygen or sulphur containing heterocyclic ring, with the proviso that at least one R.sup.1 in not hydrogen and
- (b) 0 to 5 mole %, based on the sum of components (a) and (b), of an aromatic trihalogen or tetrahalogen compound corresponding to the following formula:
- ArX.sup.1.sub.n
- in which
- Ar is an aromatic or heterocyclic group;
- X.sup.1 is a chlorine or bromine;
- and
- n is the number 3 or 4, and
- (c) an alkali sulphide, where the molar ratio of (a+b) to c is in the range of from 0.85:1 to 1.15:1;
- wherein said reaction is conducted in (1) a polar solvent which additionally contains 0.5 to 100 mole %, based on moles of aromatic dihalogen compounds, of (2) a lactam wherein the nitrogen atom of said lactam has one hydrogen substituent wherein (1) is other than (2).
A process for the production of a high molecular weight polyarylene sulphide or branched polyarylene sulphide which comprises reacting a mixture of components consisting essentially of:
- (a) 50 to 100 mole % of an aromatic dihalogen compound corresponding to the following formula:
- ##STR5## and 0 to 50 mole % of an aromatic dihalogen compound corresponding to the following formula:
- ##STR6## in which X ar halogen atoms in the meta- or para- position to one another;
- and each
- R.sup.1 is independently hydrogen, alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl, or two groups .sup.1 in the orthposition to one another attached together to form an aromatic or a nitrogen, oxygen or sulphur containing heterocyclic ring, with the proviso that at least one R.sup.1 is not hydrogen and
- (b) 0 to 5 mole %, based on the sum of components (a) and (b), of an aromatic trihalogen or tetrahalogen compound corresponding to the following formula:
- ArX.sup.1.sub.n
- in which
- Ar is an aromatic or heterocyclic group;
- X.sup.1 is a chlorine or bromine;
- and
- n is the number 3 or 4, and
- (c) an alkali sulphide, where the molar ratio of (a+b) to c is in the range of from 0.85:1 to 1.15:1;
- (d) 1 to 100 mole %, based on the moles of alkali sulphide, of an N-dialkyl, carboxylic acid amide
- wherein said reaction is conducted in (1) a polar solvent which additionally contains 0.5 to 100 mole %, based on moles of aromatic dihalogen compounds, of (2) a lactam wherein the nitrogen atom of said lactam has one hydrogen substituent.
Dependencies are inferred from the claim text.