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Extrudable thermoplastic compositions

A composite, thermoplastic technology, applied in the field of thermoplastic polymers, which can solve problems such as interference with the performance of fluoropolymer processing aids

Inactive Publication Date: 2005-08-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many of these conventionally used additives have been shown to interfere with the processing aid properties of fluoropolymers

Method used

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  • Extrudable thermoplastic compositions
  • Extrudable thermoplastic compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0062] In Examples 1-3, extrudable compositions of host polymer R1 were prepared and evaluated as described above, each composition containing 667 ppm dendritic material D2 and 33 ppm fluoropolymer additives PPA1, PPA2 and PPA3.

Embodiment 4-6

[0066] In Examples 4-6, extrudable compositions were prepared and evaluated in a manner similar to Examples 1-3, except that dendritic material D3 was used instead of D2.

Embodiment 7-9

[0070] In Examples 7-9, extrudable compositions were prepared and evaluated in a manner similar to Examples 1-3, except that dendritic material D4 was used instead of D2.

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Abstract

An extrudable composition comprising a major amount of a thermoplastic host polymer, a fluorocarbon polymer and a dendritic material wherein the extrudate demonstrates reduced levels of surface defects.

Description

field of invention [0001] This invention relates to thermoplastic polymers, such as polyolefins or other difficult-to-extrude polymers, having improved extrusion characteristics. In another aspect, the present invention relates to the use of dendritic materials, especially in combination with other processing aids, to enhance the extrusion properties of such thermoplastic polymers. Yet another aspect relates to the use of dendritic materials in thermoplastic polymers that also contain antiblocking agents. Background of the invention [0002] Westover, R.F., "Melt Extrusion", Encyclopedia of Polymer Science and Technology, Vol.8, John Wiley & Sons, (1968) pp573-581 pointed out that there is a certain critical shear rate for any polymer, beyond which, extrusion Below this rate the extrudate is smooth. It was also pointed out that in order to achieve the highest possible flow rate from the extruder, and to achieve the most uniform extrudate cross-section, the operator must co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/00B29K27/12C08L23/02C08L23/08C08L27/12C08L101/00
CPCC08L23/0815C08L27/12C08L101/005C08L2555/40Y10S424/16C08L23/02
Inventor M·P·迪龙J·H·霍恩斯C·拉瓦里
Owner 3M INNOVATIVE PROPERTIES CO