Terpolymer processing aid for polyvinyl halide polymers
AssigneeMonsanto Company
InventorsVladimir Bekker, Wayne J. Buchheim, William Vanderlinde, Donald S. T. Wang
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Abstract
A terpolymer comprising repeating units derived from an olefin, a diester of an addition polymerizable unsaturated dicarboxylic acid, and a solubilizing monomer which promotes compatibility between the terpolymer and a vinyl halide polymer. A granular form of the processing aid and a method for its preparation are also disclosed.
Claims28
A granular processing aid adapted to be reduced to a powder and blended with a vinyl halide polymer to produce a composition having superior mechanical processing properties, the granules thereof comprising agglomerates of a particulate terpolymer, said terpolymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C., and being adapted for use as a processing aid for a vinyl halide polymer, said terpolymer comprising between about 30% and about 90% by weight of repeating units derived from an olefin, between about 1% and about 30% by weight of diester repeating units derived from a diester of an addition polymerizable unsaturated dicarboxylic aid, and between about 1% and about 40% by weight of repeating units derived from a solubilizing monomer which promotes compatibility of the terpolymer with a vinyl halide polymer, said agglomerates having a particle size of between about 1/64" (0.4 mm) and about 1/16" (1.6 mm).
A granular processing aid adapted to be reduced to a powder and blended with a vinyl halide polymer to produce a composition having superior mechanical processing properties, said granules comprising agglomerates of a particulate terpolymer, said terpolymer comprising between about 30% and about 90% by weight of repeating units derived fronm an olefin, between about 1% and about 30% by weight of diester repeating units derived from a diester of an addition polymerizable unsaturated dicarboxylic acid, and between about 1 and about 30% by weight of repeating units derived from a solubilizing monomer which promotes compatibility of the terpolymer with a vinyl halide polymer, said terpolymer having a non-random distribution of repeating units, a terminal portion of said terpolymer containing a proportion of said solubilizing monomer at least sufficient to impart dispersive compatibility with said vinyl halide polymer, said agglomerates having a particle size of between about 1/64" (0.4 mm) and about 1/16" (1.6 mm).
A particulate terpolymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C. and adapted for use as a processing aid for a vinyl halide polymer, said terpolymer comprising between about 30% and about 90% by weight of diester repeating units derived from styrene, between about 1% and about 30% by weight of repeating units derived from a dialkyl fumarate and between about 1% and about 40% by weight of repeating units derived from acrylonitrile which promotes compatibility of the terpolymer with a vinyl halide polymer, said terpolymer having a nonrandom distribution of repeating units, a terminal portion of said terpolymer containing a proportion of said acrylonitrile monomer at least sufficient to impart dispersive compatibility with said vinyl halide polymer.
A granular processing aid adapted to be reduced to a powder and blended with a vinyl halide polymer to produce a composition having superior mechanical processing properties, the granules thereof comprising agglomerates of a particulate terpolymer, said terpolymer having a molecular weight of at least about 100,000, (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C., and being adapted for use as a processing aid for a vinyl halide polymer, said terpolymer comprising between about 30% and about 90% by weight of repeating units derived from styrene, between about 1% and about 30% by weight of diester repeating units derived from a dialkyl fumarate and between about 1% and about 40% by weight of repeating units derived from acrylonitrile which promotes compatibility of the terpolymer with a vinyl halide polymer, said terpolymer having a nonrandom distribution of repeating units and said agglomerates having a particle size of between about 1/64" (0.4 mm) and about 1/16" (1.6 mm).
A particulate polymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C., said polymer comprising between about 30% and about 90% by weight of repeating units derived from an olefin, between about 1% and about 30% by weight of diester repeating units derived from a diester of an addition polymerizable unsaturated dicarboxylic acid, between about 1% and about 40% by weight of repeating units derived from a solubilizing monomer which promotes compatibility of the polymer with a vinyl halide polymer and about 0.01% and about 5% by weight repeating units derived from a free addition polymerizable dicarboxylic acid, said polymer having a nonrandom distribution of repeating units, a terminal portion of said polymer containing a proportion of said solubilizing monomer at least sufficient to impart dispersive compatibility with said vinyl halide polymer.
A particulate polymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C., said polymer comprising between about 30% and about 90% by weight of repeating units derived from an olefin, between about 1% and about 30% by weight of diester repeating units derived from a diester of an addition polymerizable unsaturated dicarboxylic acid and between about 1% and about 40% by weight of repeating units derived from a solubilizing monomer selected from acrylonitrile or methacrylonitrile.
A granular processing aid adapted to be reduced to a powder and blended with a vinyl halide polymer to produce a composition having superior mechanical processing properties, the granules thereof comprising agglomerates of a particulate polymer, said particulate polymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C., said particulate polymer comprising between about 30% and about 90% by weight of repeating units derived from an olefin, between about 1% and about 30% by weight of diester repeating units derived from a diester of an addition polymerizable unsaturated dicarboxylic acid and between about 1% and about 40% by weight of repeating units derived from acrylonitrile or methacrylonitrile and said agglomerates having a particle size of between about 1/64" (0.4 mm) and about 1/16" (1.6 mm).
A particulate terpolymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and 100.degree. C., said terpolymer comprising between about 30% and about 90% by weight of repeating units derived from styrene, between about 1% and about 30% by weight of diester repeating units derived from a dialkyl fumarate, and between about 1% and about 40% by weight of repeating units derived from a solubilizing monomer selected from acrylonitrile or methacrylonitrile.
A segmented terpolymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C., said terpolymer comprising between about 30% and about 90% by weight of repeating units derived from a vinyl aromatic compound, between about 1% and about 30% by weight of diester repeating units derived from a dialkyl fumarate, and between about 1% and about 40% by weight of repeating units derived from a solubilizing monomer selected from acrylonitrile or methacrylonitrile, said terpolymer having a segmented structure comprising a first segment containing between about 30% and about 90% by weight of said vinyl aromatic compound, between bout 1% and about 30% by weight of said diester and between 0 and about 40% by weight of said solubilizing monomer, and at least one terminal segment comprising between about 10% and about 90% by weight of said vinyl aromatic compound, between 0 and about 10% by weight of said diester and between about 10% and about 90% by weight of said solubilizing monomer.
A segmented terpolymer having a molecular weight of at least about 100,000 (weight average), as measured by gel permeation chromatography and a glass transition temperature of between about 60.degree. C. and about 100.degree. C., said terpolymer comprising between about 30% and about 90% by weight of repeating units derived from styrene between about 1% and about 30% by weight of diester repeating units derived from a dialkyl fumarate, and between about 1% and about 40% by weight of repeating units derived from a solubilizing monomer selected from acrylonitrile or methacrylonitrile, said terpolymer having a segmented structure comprising a first segment containing between about 30% and about 90% by weight of said vinyl aromatic compound, between about 1% and about 30% by weight of said diester and between 0 and about 40% by weight of said solubilizing monomer, and at least one terminal segment comprising between about 10% and about 90% by weight of said vinyl aromatic compound, between 0 and about 10% by weight of said diester and between about 10% and about 90% by weight of said solubilizing monomer.
A process for preparing an addition terpolymer comprising the steps of:
- a. preparing an emulsion polymerization medium comprising water, a surfactant and a free radical initiator, said medium being heating to a temperature at which the polymerization reaction proceeds;
- b. slowly and continuously adding to said medium and copolymerizing therein at a rate such that the progress of the polymerization is limited by the rate of addition of monomers rather than by the kinetics of the polymerization, a vinyl aromatic compound, a dialkyl fumarate, and a solubilizing monomer selected from acrylonitrile and methacrylonitrile, said monomers being added in such relative proportions as to produce a terpolymer comprising between about 60% and about 85% of said vinyl aromatic compound, between about 5% and about 20% by weight of said dialkyl fumarate, and between about 10% and about 20% by weight of said solubilizing monomer;
- c. polymerizing said monomers in said medium to produce a latex of said segmented terpolymer.
A process for preparing an addition terpolymer comprising the steps of:
- a. preparing an emulsion polymerization medium comprising water, a surfactant and a free radical initiator, said medium being heated to a temperature at which the polymerization reaction proceeds;
- b. slowly and continuously adding to said medium and copolymerizing therein a vinyl aromatic compound, a dialkyl fumarate and a solubilizing monomer selected from acrylonitrile and methacrylonitrile said monomers being added at a rate such that the progress of the polymerization is limited by the rate of addition of monomers rather than by the kinetics of the polymerization and wherein a segmented polymer is produced by initially adding said monomers in such relative proportions as to produce a terpolymer containing between about 30% and about 90% by weight of said olefin, between about 1% and about 30% by weight of said diester, and between 0 and about 40% by weight of said solubilizing monomer;
- and thereafter modifying the relative proportions of monomers introduced into the emulsion so as to add to said terpolymer a terminal segment containing between about 10% and about 90% by weight of said olefin, between 0 and about 10% by weight of said diester, and between about 10% and about 90% of said solubilizing monomer;
- and polymerizing said monomers in said medium to produce a latex of said terpolymer.
Dependencies are inferred from the claim text.