Claims
- 1. A process for the production of high molecular weight polyarylene sulphide which comprises reacting
- (a) from 50 to 100 mole % of aromatic dihalogen compound corresponding to the following formula: ##STR3## and from 0 to 50 mole % of aromatic dihalogen compound corresponding to the following formula: ##STR4## wherein X represents halogen atoms in the meta- or para-position to one another; and each R.sup.1, which is the same or different, represents hydrogen, alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl, in addition to which two radicals R.sup.1 in the ortho-position to one another are attached to form an aromatic or heterocyclic ring and one of the radicals R.sup.1 is always different from hydrogen; and
- (b) from 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.sub.n (III)
- wherein
- Ar represents an aromatic or heterocyclic radical;
- X represents halogen; and
- n represents the number 3 or 4; and
- (c) alkali metal sulphide the molar ratio of (a+b):c being from 0.85:1 to 1.15:1;
- (d) with or without a catalyst; in
- (e) a polar solvent, the molar ratio of (a):(c) being from 0.75:1 to 1.25:1 and (c):(e) from 1:2 to 1:15, the reaction time being up to 24 hours and the reaction temperatures being from 150.degree. to 280.degree. C., characterized in that
- (f) the reaction is carried out in the presence of from 0.2 to 100 mole %, based on the moles of aromatic dihalogen compound, of an amino carboxylic acid.
- 2. The process according to claim 1 wherein the reaction time is up to 18 hours.
- 3. A process as claimed in claim 1, characterized in that from 0.2 to 25 mole %, based on the moles of aromatic dihalogen compound, of an amino acid is added.
- 4. A process as claimed in claim 1, characterized in that aliphatic amino acid is used.
- 5. A process as claimed in claim 1, characterized in that glycine, .alpha.-alanine .beta.-alanine, .gamma.-aminobutyric acid, .epsilon.-aminocaproic acid, 11-aminoundecanoic acid or N-methylated derivatives thereof are used.
- 6. A process as claimed in claim 1, characterized in that any water-containing reactant is completely dehydrated and the reaction is carried out in the absence of pressure or under a low pressure.
- 7. A process as claimed in claim 1, characterized in that the reactants and the polar solvent are combined either individually or in the form of mixtures or solutions at temperatures of .gtoreq.200.degree. C., accompanied by dehydration, and reacted.
- 8. A process as claimed in claim 1, characterized in that N-methyl-.epsilon.-caprolactam is used as the polar solvent.
- 9. A process as claimed in claim 1, characterized in that 1,4-dichlorobenzene is used as the aromatic dihalogen compound (I).
- 10. A process as claimed in claim 1, characterized in that 1,2,4-trichlorobenzene is used as the aromatic polyhalogen compound (III).
- 11. A process for the production of high molecular weight polyarylene sulphide with a melt viscosity of .eta..sub.m 20 to 500,000 Pascal-seconds and an average weight relative molecular weight M.sub.w (rel) as determined by chromatography of from 25,000 to 500,000 characterized in that the melt viscosity .eta..sub.m and the average weight of the relative molecular weight M.sub.w behave
- lg n.sub.m =3.48.multidot.lg M.sub.w (rel)-14.25.+-.0.1
- which comprises reacting
- (a) from 50 to 100 mole % of aromatic dihalogen at least one compound corresponding to the following formula: ##STR5## and from 0 to 50 mole % of aromatic dihalogen at least one compound corresponding to the following formula: ##STR6## wherein X represents halogen atoms in the meta- or para-position to one another; and each R.sup.1, which is the same or different, represents hydrogen, alkyl cycloalkyl, aryl, alkylaryl, arylalkyl, in addition to which two radicals R.sup.1 in the ortho-position to one another are attached to form an aromatic or heterocyclic ring and one of the radicals R.sup.1 is always different from hydrogen; and
- (c) alkali metal sulphide, the molar ratio of (a+b):c being from 0.85:1 to 1.15:1;
- (d) with or without a catalyst; in
- (e) a polar solvent, the molar ratio of (a):(c) being from 0.75:1 to 1.25:1 and (c):(e) from 1:2 to 1:15, the reaction time being up to 24 hours and the reaction temperatures being from 150.degree. to 280.degree. C., characterized in that
- (f) the reaction is carried out in the presence of from 0.2 to 100 mole %, based on the moles of aromatic dihalogen compound of an amino carboxylic acid.
- 12. The process according to claim 11 wherein the reaction time is up to 18 hours.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3428984 |
Aug 1984 |
DEX |
|
Parent Case Info
This is a division of copending application Ser. No. 761,360 filed Aug. 1, 1985.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4038261 |
Crouch et al. |
Jul 1977 |
|
4286018 |
Asakura et al. |
Aug 1981 |
|
4454189 |
Fukata |
Jun 1984 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
761360 |
Aug 1985 |
|