Statistical mixtures of halogenated bisphenols with halogen-free bisphenols, a process for their preparation and their use for the preparation of high-molecular weight thermoplastic polycarbonates

Claim 2

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR5## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -C 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR6## R 1 to R 4 are identical or different and denote H, Br or Cl, n is an integer between 20 and 800 and E are phenyl, C 1 -C 6 -alkyl-substituted phenyl, bromine-substituted phenyl or chlorine-substituted phenyl, the total halogen content resulting from the individual radicals R 1 to R 4 and E being between about 2% by weight and 45% by weight, the bromine content being between about 0 and 45% by weight and the chlorine content being between about 0 and 27% by weight wherein said polycarbonates are prepared from statistical mixtures comprising halogen-free bisphenols of the formula II with mono-, di-, tri- and tetrahalogenated bisphenols, wherein the halogen is selected from the group consisting of bromine and chlorine, of the formula I ##STR7## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR8## R 1 ' to R 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 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.

Claim 3

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR9## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO 2 --, --CO-- or ##STR10## R 1 to R 4 are identical or different and denote H, Br or Cl, n is an integer between 20 and 800 and E are phenyl, C 1 -C 6 -alkyl-substituted phenyl, bromine-substituted phenyl or chlorine-substituted phenyl, the total halogen resulting from the individual radicals R 1 to R 4 and E being between about 2% by weight and 45% by weight, the bromine content being between about 0 and 45% by weight and the chlorine content being between about 0 and 27% by weight wherein said polycarbonates are prepared from 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 ##STR11## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR12## R 1 ' to R 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 bringng bisphenols of formula II in the solid form into contact at temperatures between about -20° C. and +80° C., with gaseous chlorine, bromine, or chlorine and 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.

Claim 4

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR9## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO 2 --, --CO-- or ##STR10## R 1 to R 4 are identical or different and denote H, Br or Cl, n is an integer between 20 and 800 and E are phenyl, C 1 -C 6 -alkyl-substituted phenyl, bromine-substituted phenyl or chlorine-substituted phenyl, the total halogen resulting from the individual radicals R 1 to R 4 and E being between about 2% by weight and 45% by weight, the bromine content being between about 0 and 45% by weight and the chlorine content being between about 0 and 27% by weight wherein said polycarbonates are prepared from 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 ##STR11## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR12## R 1 ' to R 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 bringng bisphenols of formula II in the solid form into contact at temperatures between about -20° C. and +80° C., with gaseous chlorine, bromine, or chlorine and 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.

Claim 5

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR13## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR14## and R 1 to R 4 are identical or different and denote H, Br or Cl, n is an integer between 20 and 800 and E are phenyl, C 1 -C 6 -alkyl-substituted phenyl, bromine-substituted phenyl or chlorine-substituted phenyl, the total halogen content resulting from the individual radicals R 1 to R 4 and E being between about 2% by weight and 45% by weight, the bromine content being between about 0 and 45% by weight and the chlorine content being between about 0 and 27% by weight wherein said polycarbonates are prepared from 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: ##STR15## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR16## and R 1 ' to R 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 bisphenols of formula II in about 2 to 5 times the amount by weight of halogen-containing hydrocarbon and reacting, at temperatures between about -20° C. and +80° C., with the amounts of bromine, chlorine, or bromine and chlorine required for the desired halogen content in the mixture of bisphenols.

Claim 6

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR13## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR14## and R 1 to R 4 are identical or different and denote H, Br or Cl, n is an integer between 20 and 800 and E are phenyl, C 1 -C 6 -alkyl-substituted phenyl, bromine-substituted phenyl or chlorine-substituted phenyl, the total halogen content resulting from the individual radicals R 1 to R 4 and E being between about 2% by weight and 45% by weight, the bromine content being between about 0 and 45% by weight and the chlorine content being between about 0 and 27% by weight wherein said polycarbonates are prepared from 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: ##STR15## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR16## and R 1 ' to R 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 bisphenols of formula II in about 2 to 5 times the amount by weight of halogen-containing hydrocarbon and reacting, at temperatures between about -20° C. and +80° C., with the amounts of bromine, chlorine, or bromine and chlorine required for the desired halogen content in the mixture of bisphenols.

Claim 7

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR17## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR18## R 1 to R 4 are identical or different and denote H, Br or Cl, and n is an integer between 20 and 800, wherein said polycarbonates are prepared from 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 ##STR19## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -C 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR20## R 1 ' to R 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 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.

Claim 8

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR17## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR18## R 1 to R 4 are identical or different and denote H, Br or Cl, and n is an integer between 20 and 800, wherein said polycarbonates are prepared from 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 ##STR19## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -C 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR20## R 1 ' to R 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 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.

Claim 9

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR21## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR22## R 1 to R 4 are identical or different and denote H, Br or Cl, and n is an integer between 20 and 800, wherein said polycarbonates are prepared from 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 ##STR23## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR24## R 1 ' to R 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° C. and +80° C., with gaseous chlorine, bromine, or chlorine and 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.

Claim 10

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR21## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR22## R 1 to R 4 are identical or different and denote H, Br or Cl, and n is an integer between 20 and 800, wherein said polycarbonates are prepared from 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 ##STR23## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR24## R 1 ' to R 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° C. and +80° C., with gaseous chlorine, bromine, or chlorine and 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.

Claim 11

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR25## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR26## R 1 to R 4 are identical or different and denote H, Br or Cl, and n is an integer between 20 and 800, wherein said polycarbonates are prepared from 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 ##STR27## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR28## R 1 ' to R 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 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° C. and +80° C., with the amounts of bromine, chlorine, or bromine and chlorine required for the desired halogen content in the mixtures of bisphenols.

Claim 12

A composition comprising high-molecular weight, thermoplastic, aromatic polycarbonates containing halogen selected from the group consisting of bromine and chlorine having recurrent but not identical structural units of the following formula III ##STR25## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR26## R 1 to R 4 are identical or different and denote H, Br or Cl, and n is an integer between 20 and 800, wherein said polycarbonates are prepared from 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 ##STR27## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR28## R 1 ' to R 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 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° C. and +80° C., with the amounts of bromine, chlorine, or bromine and chlorine required for the desired halogen content in the mixtures of bisphenols.

Claim 13

Polycarbonates according to claim 1, wherein the total halogen content is between about 3 and 27% by weight.

Claim 14

Polycarbonates according to claim 2, wherein the total halogen content is between about 3 and 27% by weight.

Claim 15

Polycarbonates according to claim 3, wherein the total halogen content is between about 3 and 27% by weight.

Claim 16

Polycarbonate compositions according to claim 1, wherein up to about 40% by weight of glass fibers are included.

Claim 17

Polycarbonate compositions according to claim 2, wherein up to about 40% by weight of glass fibers are included.

Claim 18

Polycarbonate compositions according to claim 3, wherein up to about 40% by weight of glass fibers are included.

Claim 19

A composition comprising the polycarbonate of claim 1 and a polymer selected from the group consisting of halogen-free, thermoplastic, aromatic polycarbonates and thermoplastic polyesters.

Claim 20

A composition comprising the polycarbonate of claim 2 and a polymer selected from the group consisting of halogen-free, thermoplastic, aromatic polycarbonates and thermoplastic polyesters.

Claim 21

A composition comprising the polycarbonate of claim 3 and a polymer selected from the group consisting of halogen-free, thermoplastic, aromatic polycarbonates and thermoplastic polyesters.

Claim 22

In a process for the preparation of polycarbonates from hydroxyl-bearing compounds, the improvement comprising using statistical mixtures of bisphenols as the hydroxyl-bearing compounds, said 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 ##STR29## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR30## R 1 to R 4 are identical or different and denote H, Br or Cl, and at least one R is Br or Cl, and 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.

Claim 23

In a process for the preparation of polycarbonates from hydroxyl-bearing compounds, the improvement comprising using statistical mixtures of bisphenols as the hydroxyl-bearing compounds, said 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 ##STR29## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR30## R 1 to R 4 are identical or different and denote H, Br or Cl, and at least one R is Br or Cl, and 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.

Claim 24

In a process for the preparation of polycarbonates from hydroxyl-bearing compounds, the improvement comprising using statistical mixtures of bisphenols as the hydroxyl-bearing compounds, said 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 ##STR31## wherein X denotes C 1 -C 9 akylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR32## R 1 to R 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° C. and +80° C., with gaseous chlorine, bromine, or chlorine and 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.

Claim 25

In a process for the preparation of polycarbonates from hydroxyl-bearing compounds, the improvement comprising using statistical mixtures of bisphenols as the hydroxyl-bearing compounds, said 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 ##STR31## wherein X denotes C 1 -C 9 akylene, C 2 -C 9 alkylidene, C 5 -c 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR32## R 1 to R 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° C. and +80° C., with gaseous chlorine, bromine, or chlorine and 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.

Claim 26

In a process for the preparation of polycarbonates from hydroxyl-bearing compounds, the improvement comprising using statistical mixtures of bisphenols as the hydroxyl-bearing compounds, said 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 ##STR33## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -C 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR34## R 1 to R 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° C. and +80° C., with the amounts of bromine, chlorine, or bromine and chlorine required for the desired halogen content in the mixture of bisphenols.

Claim 27

In a process for the preparation of polycarbonates from hydroxyl-bearing compounds, the improvement comprising using statistical mixtures of bisphenols as the hydroxyl-bearing compounds, said 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 ##STR33## wherein X denotes C 1 -C 9 alkylene, C 2 -C 9 alkylidene, C 5 -C 15 cycloalkylene, C 5 -C 15 cycloalkylidene, a single bond, --O--, --S--, --SO--, --SO 2 --, --CO-- or ##STR34## R 1 to R 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° C. and +80° C., with the amounts of bromine, chlorine, or bromine and chlorine required for the desired halogen content in the mixture of bisphenols.