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Processing aids and masterbatches for the same

a technology applied in the field of processing aids and masterbatches, can solve the problems of difficult to obtain good formed products, difficult to achieve good formed products, and more so as to reduce extrusion load, shorten melt fracture elimination time, and delay the creation of die buildup

Inactive Publication Date: 2017-06-15
HANNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a new processing aid for non-fluorinated melt-processable polymers that can improve productivity without the need for an interfacial agent. By using a clustered particle form of small particles of the fluoropolymer processing aid, the time it takes to eliminate melt fracture can be reduced and die buildup can be prevented. This processing aid can also decrease extrusion load and enhance productability when extruding non-fluorinated polymers.

Problems solved by technology

However, a non-fluorinated melt-processable polymer composition inevitably has a critical shear rate, the excess of which is a cause of a surface roughening, rendering it difficult to obtain a good formed product.
The fluoropolymer processing aid may enhance processability but consumes more melt fracture elimination time.

Method used

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  • Processing aids and masterbatches for the same
  • Processing aids and masterbatches for the same
  • Processing aids and masterbatches for the same

Examples

Experimental program
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Effect test

first embodiment

[0050]A processing aid was prepared by dry-blending a partitioning agent of 10 weight % and a fluoropolymer of 90 weight % forming clustered secondary particles each having a particle size of 1 mm or less and being a combination of primary fluoropolymer particles each with a diameter of 0.02 μm to 0.5 μm and constituted of a co-polymer of vinylidene fluoride and hexafluoropropylene. As the partitioning agent, talc (KOCH KC5000) was used. A photomicrograph of the secondary particles of the fluoropolymer is shown in FIG. 1.

second embodiment

[0051]A processing aid was prepared by dry-blending a partitioning agent of 10 weight % and a fluoropolymer of 90 weight % forming clustered secondary particles each having a particle size of 2 mm or less and being a combination of primary fluoropolymer particles each with a diameter of 0.02 μm to 0.5 μm and constituted of a co-polymer of vinylidene fluoride and hexafluoropropylene. As the partitioning agent, talc (KOCH KC5000) was used. A photomicrograph of the secondary particles of the fluoropolymer is shown in FIG. 2.

third embodiment

[0052]A processing aid was prepared by dry-blending a partitioning agent of 3 weight % and a fluoropolymer of 97 weight % forming clustered secondary particles each having a particle size of 1 mm or less and being a combination of primary fluoropolymer particles each with a diameter of 0.02 μm to 0.5 μm and constituted of a co-polymer of vinylidene fluoride and hexafluoropropylene. As the partitioning agent, talc (KOCH KC5000) was used.

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Abstract

The present invention relates to a processing aid of a non-fluorinated melt-processable polymer and a masterbatch for a processing aid, features the inclusion of a processing aid comprising a fluoropolymer forming clustered secondary particles each having a particle size of 2 μm to 2 mm and being a combination of primary fluoropolymer particles each having a diameter of 0.02 μm to 0.5 μm, and may accelerate the elimination of melt fracture despite the omission of an interfacial agent and decrease extrusion load upon process to thereby enhance productability.

Description

TECHNICAL FIELD[0001]The present invention relates to processing aids and masterbatches for processing aids that are used upon extrusion of a non-fluorinated melt-processable polymer, and more specifically, to processing aids and masterbatches for processing aids that, even without including an interfacial agent, may shorten the melt fracture elimination time while slowing down die buildup and that, when processed, exhibit a decreased extrusion load to thereby enhance productability.DISCUSSION OF RELATED ART[0002]A quick extrusion process is required to achieve higher productability and cost savings in processing non-fluorinated melt-processable thermoplastic polymers. However, a non-fluorinated melt-processable polymer composition inevitably has a critical shear rate, the excess of which is a cause of a surface roughening, rendering it difficult to obtain a good formed product.[0003]To address such issue while achieving an increased extrusion speed, it has been known to use a fluor...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08F214/28C08K3/34C08L27/20C08L23/06C08F214/22C08J3/22
CPCC08L27/16C08L2310/00C08F214/28C08J3/22C08L27/20C08L23/06C08K3/34C08J2323/06C08J2327/16C08J2327/20C08J2423/06C08J2427/16C08J2427/20C08L2205/06C08F214/22C08J3/226C08K3/26C08K3/36C08K5/0008C08K2201/003B29C48/022B29C48/04B29K2027/12B29K2027/16C08L23/0815C08J3/12C08L27/12
Inventor KIM, SOO WANKIM, EUN KYOUNGLEE, DAE HO
Owner HANNANOTECH