Low-viscosity polyarylene sulfides
AssigneeBayer Aktiengesellschaft
InventorsBurkhard Kohler, Udo Wolf, Wolfgang Russeler, Wilfried Haese
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Abstract
The invention relates to low-viscosity polyarylene sulfides (PAS), preferably polyphenylene sulfides (PPS), which are produced with cycloaliphatic, unsaturated acids as molecular weight regulators.
Claims13
Polyarylene sulfides obtained by reaction of aromatic dihalogen compounds with--based on aromatic dihalogen compounds--98 to 120 mol-% alkali metal sulfides and/or hydrogen sulfides, the ratio of sulfides to hydrogen sulfides being between 100:0 and 60:40, in dipolar aprotic solvents in the presence of--based on aromatic dichlorine compounds--0.1 to 10 mol-% cycloaliphatic unsaturated acids comprising at least 50% by weight abietic acid.
Polyarylene sulfides obtained by reaction of aromatic dihalogen compounds with--based on aromatic dihalogen compounds--98 to 120 mol-% alkali metal sulfides and/or hydrogen sulfides, the ratio of sulfides to hydrogen sulfides being between 100:0 and 60:40, in dipolar aprotic solvents in the presence of--based on aromatic dichlorine compounds--0.1 to 10 mol-% alkali metal salts of cycloaliphatic unsaturated acids comprising at least 50% by weight abietic acid.
Dependencies are inferred from the claim text.