Non-opaque flame-retardant polycarbonate composition

Claim 2

In a flame-retardant aromatic carbonate polymer composition comprising in admixture an aromatic carbonate polymer and an additive selected from the group consisting of the metal salts of substituted and unsubstituted sulfonic acids of aromatic ketones and mixtures thereof, wherein said metal salts are selected from the group consisting of alkali metals and alkaline earth metals, and mixtures of these metal salts, and said substituent on the metal salt of the substituted sulfonic acids of aromatic ketones is selected from the group consisting of electron withdrawing radicals and mixtures of electron withdrawing radicals; the improvement comprising including said additive in said admixture in an amount of from 0.001 to about 2.0 parts per hundred parts of the aromatic carbonate polymer, said aromatic carbonate polymer and said additive each having a refractive index in the range of 1.54 to 1.65 such that said composition is non-opaque.

Claim 3

In a shaped article comprising in admixture an aromatic carbonate polymer and an additive selected from the group consisting of the metal salts of substituted and unsubstituted sulfonic acids of aromatic ketones and mixtures thereof, wherein said metal salts are selected from the group consisting of alkali metal and alkaline earth metals, and mixtures of these metal salts, and said substituent on the metal salt of the substituted sulfonic acids of aromatic ketones is selected from the group consisting of electron withdrawing radicals and mixtures of electron withdrawing radicals, the improvement comprising including said additive in said admixture in an amount of from 0.001 to about 2.0 parts per hundred parts of said aromatic carbonate polymer, said additive and said aromatic carbonate polymer each having a refractive index in the range of 1.54 to 1.65 such that said article has a refractive index in the range of 1.54 to 1.65 and is non-opaque.

Claim 4

In a shaped article comprising in admixture an aromatic carbonate polymer and an additive selected from the group consisting of the metal salts of substituted and unsubstituted sulfonic acids of aromatic ketones and mixtures thereof, wherein said metal salts are selected from the group consisting of alkali metal and alkaline earth metals, and mixtures of these metal salts, and said substituent on the metal salt of the substituted sulfonic acids of aromatic ketones is selected from the group consisting of electron withdrawing radicals and mixtures of electron withdrawing radicals, the improvement comprising including said additive in said admixture in an amount of from 0.001 to about 2.0 parts per hundred parts of said aromatic carbonate polymer, said additive and said aromatic carbonate polymer each having a refractive index in the range of 1.54 to 1.65 such that said article has a refractive index in the range of 1.54 to 1.65 and is non-opaque.

Claim 5

The shaped article of claim 2 wherein the metal salt of the substituted and unsubstituted sulfonic acids of aromatic ketones have the following formula: ##STR3## wherein R' and R" are independently selected from the group consisting of aryl radicals of 1-2 aromatic rings and an aliphatic radical of 1-6 carbon atoms, provided, however, that R' and R" must contain at least one aromatic radical, and wherein M is a metal selected from the group consisting of alkali metals and alkaline earth metals and X is an electron withdrawing radical.

Claim 6

The shaped article of claim 3 wherein the electron withdrawing radical is selected from the group consisting of halo-, nitro-, trihalomethyl- and cyano- radicals and mixtures thereof.

Claim 7

The shaped article of claim 3 wherein X is chlorine.

Claim 8

The shaped article of claim 3 wherein R' and R" are aryl radicals of one aromatic ring each.

Claim 9

The shaped article of claim 3 wherein M is calcium.

Claim 10

The shaped article of claim 2 wherein the metal salt is potassium-4-chlorobenzophenone-3-sulfonate.

Claim 11

The shaped article of claim 2 wherein the metal salt is potassium benzophenone-3-sulfonate.

Claim 12

The shaped article of claim 2 wherein the metal salt is sodium acetophenone-3-sulfonate.

Claim 13

The shaped article of claim 2 wherein the metal salt is barium 2,3-dichloronaphthoquinone-6-sulfonate.

Claim 14

The shaped article of claim 2 wherein the metal salt is sodium 2,3-dichloronaphthoquinone-6-sulfonate.

Claim 15

The shaped article of claim 2 in the form of a sheet.

Claim 16

The shaped article of claim 2 in the form of a pellet.