Lubricant composition for halogen-containing polymers
AssigneeM&T Chemicals Inc.
InventorsAlfred Stoloff, Anthony L. Williams
Life of this patent
Estimating the term…
Abstract
The processability and melt strength of halogen-containing polymers derived at least in part from vinyl chloride or vinylidene chloride are significantly improved using a conventional external lubricant in combination with an oxidized ethylene polymer exhibiting a melt viscosity of from 1,000 to about 60,000 centipoises at 140.degree. C. and an acid number of at least 5.
Claims22
A composition for improving the melt strength and processability of polymers formed from at least one halogen-containing ethylenically unsaturated compound, said composition comprising (1) an effective amount of a heat stabilizer for said polymers, (2) an effective amount of an external lubricant for said polymers, said lubricant being selected from the group consisting of paraffin oils, paraffin waxes, liquid and solid hydrocarbons and non-oxidized polyethylene waxes, and (3) an oxidized polymer wherein at least 50% of the repeating units are derived from ethylene and any remaining repeating units are derived from at least one .alpha.-olefin containing from 3 to 10 carbon atoms, wherein said oxidized polymer exhibits an acid number greater than 5 and a melt viscosity of from 1,000 to about 60,000 centipoises at a temperature of 140.degree. C.
A halogen-containing polymer composition exhibiting improved melt strength and processability, said composition comprising (1) a halogen-containing polymer selected from the group consisting of homopolymers of vinyl chloride or vinylidene chloride and copolymers of vinyl chloride and vinylidene chloride with one another or with at least one copolymerizable ethylenically unsaturated compound, (2) an effective amount of a heat stabilizer for said halogen-containing polymer, (3) an effective amount of an external lubricant for said halogen-containing polymer, said lubricant being selected from the group consisting of paraffin oils, paraffin waxes, liquid and solid hydrocarbons and non-oxidized polyethylene waxes, and (4) from 0.05 to 1.5%, based on the weight of said halogen-containing polymer, of an oxidized polymer wherein at least 50% of the repeating units are derived from ethylene and any remaining repeating units are derived from at least one .alpha.-olefin containing from 3 to 10 carbon atoms, wherein said oxidized polymer exhibits an acid number greater than 5 and a melt viscosity of from 1,000 to about 60,000 centipoises at a temperature of 140.degree. C.
Dependencies are inferred from the claim text.