Process for the manufacture of a light colored thermostable chlorinated polyolefin

Claim 2

IN A PROCESS FOR THE MANUFACTURE OF A LIGHT COLORED THERMOSTABLE CHLOROPOLYOLEFIN BY CHLORINATING PULVERULENT POLYETHYLENE, POLYPROPYLENE OR A COPOLYMER OF ETHYLENE WITH A STRAIGHT CHAIN OR BRANCHED A-OLEFIN HAVING 3 TO 6 CARBON ATOMS, THE MOLECULAR WEIGHT OF THE POLYMER BEING IN THE RANGE OF FROM ABOUT 20,000 TO 2,000,000, WITH GASEOUS CHLORINE IN THEE FLUIDIZED OR MOVING BED, POSSIBLY AFTER THERMAL TREATMENT OF THE POLYMER, THE IMPROVEMENT OF CARRYING OUT THE CHLORIATION IN THE PRESENCE OF 0.01 TO 3.0% BY WEIGHT, CALCULATED ON THE AMOUNT OF POLYMER TO BE CHLORINATED AND UNIFORMLY DISPERSED THEREIN, OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A. A SATURATED ALIPHATIC MONO- OR DICARBOXYLIC ACID HAVING 4 TO 50 CARBON ATOMS, B. A MONONUCLEAR AROMATIC, POSSIBLY ALKYL-SUBSTITUTED, MONOCARBOXYLIC ACID HAVING 7 TO 23 CARBON ATOMS, C. AN ALIPHATIC HYDROXI-MONOCARBOXYLIC ACID HAVING 2 TO 18 CARBON ATOMS IN THE MOLECULE, D. AN ALIPHATIC HYDROXI-DICARBOXYLIC ACID HAVING 4 TO 10 CARBON ATOMS, E. AN AROMATIC, POSSIBLY ALKYL-SUBSTITUTED, HYDROXICARBOXYLIC ACID HAVING 7 TO 11 CARBON ATOMS, F. AN ALKALI METAL OR ALKALINE EARTH METAL SALT OF ANY ONE OF THE ACIDS NAMED SUB (A) TO (E), G. AN ANHYDRIDE OF AN ALIPHATIC MONOCARBOXYLIC ACID HAVING 4 TO 50 CARBON ATOMS, H. AN ANHYDRIDE OF AN ALIPHATIC DICARBOXYLIC ACID HAVING 4 TO 50 CARBON ATOMS, I. AN ANHYDIDE OF AN AROMATIC MONOCARBOXYLIC ACID HAVING 7 TO 23 CARBON ATOMS, AND J. AN ANHYDRIDE OF AN AROMATIC DICARBOOXYLIC ACID HAVING 8 TO 23 CARBON ATOMS.

Claim 3

In a process for the manufacture of a light colored thermostable chloropolyolefin by chlorinating pulverulent polyethylene, polypropylene or a copolymer of ethylene with a straight chain or branched Alpha -olefin having 3 to 6 carbon atoms, the molecular weight of the polymer being in the range of from about 20,000 to 2,000,000, with gaseous chlorine in the fluidized or moving bed, possibly after a thermal treatment of the polymer, the improvement of carrying out the chlorination in the presence of 0.01 to 3.0% by weight, calculated on the amount of polymer to be chlorinated and uniformly dispersed therein, of a compound selected from the group consisting of a. a saturated aliphatic mono- or dicarboxylic acid having 4 to 50 carbon atoms, b. a mononuclear aromatic, possibly alkyl-substituted, monocarboxylic acid having 7 to 23 carbon atoms, c. an aliphatic hydroxi-monocarboxylic acid having 2 to 18 carbon atoms in the molecule, d. an aliphatic hydroxi-dicarboxylic acid having 4 to 10 carbon atoms, e. an aromatic, possibly alkyl-substituted, hydroxicarboxylic acid having 7 to 11 carbon atoms, f. an alkali metal or alkaline earth metal salt of any one of the acids named sub (a) to (e), g. an anhydride of an aliphatic monocarboxylic acid having 4 to 50 carbon atoms, h. an anhydride of an aliphatic dicarboxylic acid having 4 to 50 carbon atoms, i. an anhydride of an aromatic monocarboxylic acid having 7 to 23 carbon atoms, and j. an anhydride of an aromatic dicarboxylic acid having 8 to 23 carbon atoms.

Claim 4

In a process for the manufacture of a light colored thermostable chloropolyolefin by chlorinating pulverulent polyethylene, polypropylene or a copolymer of ethylene with a straight chain or branched Alpha -olefin having 3 to 6 carbon atoms, the molecular weight of the polymer being in the range of from about 20,000 to 2,000,000, with gaseous chlorine in the fluidized or moving bed, possibly after a thermal treatment of the polymer, the improvement of carrying out the chlorination in the presence of 0.01 to 3.0% by weight, calculated on the amount of polymer to be chlorinated and uniformly dispersed therein, of a compound selected from the group consisting of a. a saturated aliphatic mono- or dicarboxylic acid having 4 to 50 carbon atoms, b. a mononuclear aromatic, possibly alkyl-substituted, monocarboxylic acid having 7 to 23 carbon atoms, c. an aliphatic hydroxi-monocarboxylic acid having 2 to 18 carbon atoms in the molecule, d. an aliphatic hydroxi-dicarboxylic acid having 4 to 10 carbon atoms, e. an aromatic, possibly alkyl-substituted, hydroxicarboxylic acid having 7 to 11 carbon atoms, f. an alkali metal or alkaline earth metal salt of any one of the acids named sub (a) to (e), g. an anhydride of an aliphatic monocarboxylic acid having 4 to 50 carbon atoms, h. an anhydride of an aliphatic dicarboxylic acid having 4 to 50 carbon atoms, i. an anhydride of an aromatic monocarboxylic acid having 7 to 23 carbon atoms, and j. an anhydride of an aromatic dicarboxylic acid having 8 to 23 carbon atoms.

Claim 5

The process of claim 1, wherein a saturated monocarboxylic acid having 17 to 30 carbon atoms or an alkali metal or alkaline earth metal salt thereof is used.

Claim 6

The process of claim 1, wherein a saturated aliphatic dicarboxylic acid having 4 to 10 carbon atoms or an alkali metal or alkaline earth metal salt thereof is used.

Claim 7

The process of claim 1, wherein an aromatic, possibly alkyl substituted, monocarboxylic acid having 7 to 16 carbon atoms or an alkali metal or alkaline earth metal salt thereof is used.