Statistical mixtures of halogenated bisphenols with halogen-free bisphenols
AssigneeBayer Aktiengesellschaft
InventorsManfred Schmidt, Dieter Freitag, Werner Nouvertne
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Abstract
The invention relates to statistical mixtures of halogenated bisphenols with halogen-free bisphenols and to processes for their preparation. This invention further relates to new aromatic, bromine-containing and/or chlorine-containing, high-molecular weight thermoplastic polycarbonates with good resistance to fire (oxygen index .gtoreq. 36%) and good flow properties, to their preparation from the statistical mixtures of halogenated bisphenols and halogen-free bisphenols and to their use alone or as a mixture with halogen-free polycarbonates or with thermoplastic polyesters for the preparation of moldings, films and fibers.
Claims8
Statistical mixtures comprising halogen-free bisphenols of the formula II with mono-, di-, tri- and tetra -halogenated bisphenols, wherein the halogen is selected from the group consisting of bromine and chlorine, of the formula I ##STR5## wherein X denotes C.sub.1 - C.sub.9 alkylene, C.sub.2 - C.sub.9 alkylidene, C.sub.5 - C.sub.15 cycloalkylene, C.sub.5 - C.sub.15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO.sub.2 --, --CO-- or ##STR6## R.sub.1 to R.sub.4 are identical or different and denote H, Br or Cl, and at least one R is Br or Cl
- wherein the total halogen content of the statistical mixtures is about 3 to 48% by weight and they contain about 0 - 48% by weight of bromine alone, about 0 - 30% by weight of chlorine alone or bromine and chlorine conjointly in any desired ratios by weight.
Statistical mixtures comprising halogen-free bisphenols of the formula II with mono-, di-, tri- and tetra-halogenated bisphenols, wherein the halogen is selected from the group consisting of bromine and chlorine, of the formula I ##STR7## wherein X denotes C.sub.1 -C.sub.9 alkylene, C.sub.2 -C.sub.9 alkylidene, C.sub.5 -C.sub.15 cycloalkylene, C.sub.5 -C.sub.15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO.sub.2 --, --CO-- or ##STR8## R.sub.1 to R.sub.4 are identical or different and denote H, Br or Cl and at least one R is Br or Cl, characterized in that said statistical mixtures have a total halogen content of about 3 to 48% by weight and contain about 0-48% by weight of bromine alone, about 0-30% by weight of chlorine alone or bromine and chlorine conjointly in any desired ratios by weight and wherein said statistical mixtures of bisphenols are prepared by a process comprising bringing bisphenols of formula II in the solid form into contact at temperatures between about -20.degree. C and +80.degree. C, with gaseous chlorine and/or bromine, optionally using an inert gas, and subsequently withdrawing the resulting statistical mixture of bisphenols from the further reaction after the desired halogen content has been reached.
Statistical mixtures comprising halogen-free bisphenols of the formula II with mono-, di-, tri- and tetra-halogenated bisphenols, wherein the halogen is selected from the group consisting of bromine and chlorine, of the formula I ##STR9## wherein X denotes C.sub.1 -C.sub.9 alkylene, C.sub.2 -C.sub.9 alkylidene, C.sub.5 -C.sub.15 cycloalkylene, C.sub.5 -C.sub.15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO.sub.2 --, --CO-- or ##STR10## and R.sub.1 to R.sub.4 are identical or different and denote H, Br or Cl and at least one R is Br or Cl,
- characterized in that said statistical mixtures have a total halogen content of about 3 to 48% by weight and contain about 0-48% by weight of bromine alone, about 0-30% by weight of chlorine alone or bromine and chlorine conjointly in any desired ratios by weight and wherein said statistical mixtures of bisphenols are prepared by a process comprising suspending the bisphenols of formula II in about 2 to 5 times the amount by weight of a halogen-containing hydrocarbon and reacting, at temperatures between about -20.degree. and +80.degree. C, with the amounts of bromine and/or chlorine required for the desired halogen content in the mixture of bisphenols.
Dependencies are inferred from the claim text.