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US 2026/0125539 A1Published application
Extrusion process aids for polyolefins
OwnerVeerag Mehta, Vikas Mehtainventors
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Abstract
Organic molecules with free acid groups and a molecular weight of greater than 140 g/mol used in combination with surfactants, are used as processing aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined herein, or can be used with prior art processing aids, depending on the end use application. The novel materials and processes provide a useful alternative to the sole use of fluorine-based polymer processing aids.
Claims30
A process for preparing a thermoplastic composition extrudate, the process comprising:
- A) extruding a thermoplastic composition in a melt extrusion process, the thermoplastic composition comprising a polyolefin
- selected from the group comprising:
- a) a linear polyolefin,
- b) a branched polyolefin,
- c) a homopolymer of polyolefin,
- d) a copolymer polyolefin,
- e) a terpolymer polyolefin, and
- f) mixtures of a)-e), and
- from 0.01% to 4% based on the weight of the polyolefin of a material selected from the group consisting of a linear carbon-based material, a branched carbon-based material, and mixtures thereof, each having a molecular weight greater than 140 g/mol and each having an acid value of 0.1 mg/KOH or above with an acid functionality on a backbone thereof consisting of one or multiple functional acid groups selected from the group consisting of:
- i) phosphoric acid, (ii) phosphoric acid derivatives, (iii) sulphonic acid, iv) sulphonic acid derivatives, v) carboxylic acid, vi) carboxylic acid derivatives,
- vii) dicarboxylic acid, viii)dicarboxylic acid derivatives, ix) tricarboxylic acid, x) tricarboxylic acid derivatives, xi) acrylic acid, xii) acid modified acrylic acid derivatives, xiii)carbonic acid, xiv) carbonic acid derivatives, xv) Benzoic acid, xvi) benzoic acid derivatives, and xvii) mixtures of i)-xvi), and
- from 0.01% to 4% based on the weight of the polyolefin of at least one surfactant having a molecular weight of greater than 175 g/mol, and selected from the group consisting of cationic, anionic, non-ionic, amphoteric, and mixtures thereof;
- B) wherein the melt extrusion is carried out in the absence of fluorinated or siloxane additives.
10 more elements
A thermoplastic composition comprising an extrudate derived from
- A) a polyolefin selected from the group comprising:
- a) a linear polyolefin,
- b) a branched polyolefin,
- c) a homopolymer of polyolefin,
- d) a copolymer polyolefin,
- e) a terpolymer polyolefin, and
- f) mixtures of a)-e);
- B) from 0.01% to 4% based on the weight of the polyolefin of a material selected from the group consisting of a linear carbon-based material, and a branched carbon-based material, and mixtures thereof, each having a molecular weight greater than 140 g/mol and each having an acid value between 0.01 and 500 mg/KOH with an acid functionality on a backbone thereof consisting of one or multiple functional acid groups selected from the group consisting of:
- i) phosphoric acid, ii) phosphoric acid derivatives, iii) sulphonic acid,
- iv) sulphonic acid derivatives, v) carboxylic acid, vi) carboxylic acid derivatives,
- vii) dicarboxylic acid, viii) dicarboxylic acid derivatives, ix) tricarboxylic acid,
- x) tricarboxylic acid derivatives, xi) acrylic acid, xii) acid modified acrylic acid derivatives, xiii) carbonic acid, xiv) carbonic acid derivatives, xv) benzoic acid, xvi) benzoic acid derivatives, and xvii) mixtures of i)-xvi);
- from 0.01% to 4% based on the weight of the polyolefin of at least one surfactant having a molecular weight of greater than 175 g/mol, and selected from the group consisting of:
- cationic, anionic, non-ionic, amphoteric, and mixtures thereof.
11 more elements
A method for reducing melt extrusion defects during the extrusion of a thermoplastic composition comprising a polyolefin, the method comprising:
- A. adding at least one acid functional additive to a polyolefin;
- B. adding at least one surfactant to said polyolefin;
- C. extruding the thermoplastic composition in a melt extrusion process;
- wherein the polyolefin is selected from the group consisting of low-density polyethylene, linear low density polyethylene, medium density polyethylene, very low density polyethylene, high density polyethylene, polypropylene, polybutene, ionomers, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, and mixtures thereof.
1 more element
A process for preparing a thermoplastic composition extrudate, the process comprising:
- extruding a thermoplastic composition in a melt extrusion process, the thermoplastic composition comprising a combination of a polyolefin selected from the group comprising:
- a. a linear polyolefin,
- b. a branched polyolefin,
- c. a homopolymer of polyolefin,
- d. a copolymer polyolefin,
- e. a terpolymer polyolefin, and
- f. mixtures of a)-e);
- from 0.01% to 4% based on the weight of the polyolefin of a material selected from the group consisting of a linear carbon-based material, and a branched carbon-based material, and mixtures thereof, each having a molecular weight greater than 140 g/mol and each having an acid value between of 0.1 mg/KOH or greater with an acid functionality on a backbone thereof consisting of one or multiple functional acid groups selected from the group consisting of:
- i) phosphoric acid, ii) phosphoric acid derivatives, iii) sulphonic acid,
- iv) sulphonic acid derivatives, v) carboxylic acid, vi) carboxylic acid derivatives,
- vii) dicarboxylic acid, viii)dicarboxylic acid derivatives, ix) tricarboxylic acid,
- x) tricarboxylic acid derivatives, xi) acrylic acid, xii) acid modified acrylic acid derivatives, xiii)carbonic acid, xiv) carbonic acid derivatives,
- xv) Benzoic acid,
- xvi) benzoic acid derivatives, and xvii) mixtures of i)-xvi). from 0.01% to 4% based on the weight of the polyolefin of at least one surfactant having a molecular weight greater than 175 g/mol, and selected from the group consisting of:
- cationic, anionic, non-ionic, amphoteric, and mixtures thereof.
12 more elements
Dependencies are inferred from the claim text.