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Polyester polymer and copolymer compositions containing metallic titanium particles

a technology of titanium particles and polymer polymers, applied in the direction of conductive materials, non-conductive materials with dispersed conductive materials, conductors, etc., can solve the problems of poor reheat efficiency of polymers, especially pet, and material negative effect on the visual appearance of pet containers, etc., to achieve the effect of improving reheat efficiency

Inactive Publication Date: 2006-09-14
XIA ZHIYONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyesters, especially PET, absorb poorly in the region from 500 nm to 1,500 nm.
Unfortunately, these materials tend to have a negative effect on the visual appearance of PET containers, for example increasing the haze level and / or causing the article to have a dark appearance.

Method used

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  • Polyester polymer and copolymer compositions containing metallic titanium particles
  • Polyester polymer and copolymer compositions containing metallic titanium particles
  • Polyester polymer and copolymer compositions containing metallic titanium particles

Examples

Experimental program
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examples

[0136] The titanium (Ti) metal particles used in the examples were obtained from Argonide Nano-materials Technologies. The particles had a d50 particle size of about 50 nm with a relatively narrow particle size distribution.

[0137] The polymer used in the examples was commercial grade PET Voridian™ CM01 Polymer, which is a PET copolymer containing no reheat additive. The titanium metal particles were added into virgin CM01 during melt compounding. First, a concentrate containing 416 ppm titanium metal particles was made using a one-inch single screw extruder with saxton and pineapple mixing head. The extruder was also equipped with pelletization capability. The concentrate was then crystallized using a tumbling crystallizer at 170° C. for 1 hour. The crystallized concentrate was then let down into CM01 virgin polymer with the final concentration of titanium metal in CM01 ranging from 2 ppm to 15.4 ppm. During the compounding process, CM01 virgin polymer was used to purge the extrude...

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Abstract

Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein metallic titanium particles that improve the reheat properties of the compositions. Processes for making such compositions are also disclosed. The titanium particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of application Ser. No. 10 / 988,226 filed Nov. 12, 2004, the disclosure of which is incorporated herein by reference.FIELD OF THE INVENTION [0002] The invention relates to polyester compositions that are useful in packaging, such as in the manufacture of beverage containers by reheat blow molding, or other hot forming processes in which polyester is reheated. The compositions exhibit improved reheat, while maintaining acceptable visual appearance, such as clarity and color. BACKGROUND OF THE INVENTION [0003] Many plastic packages, such as those made from poly(ethylene terephthalate) (PET) and used in beverage containers, are formed by reheat blow-molding, or other operations that require heat softening of the polymer. [0004] In reheat blow-molding, bottle preforms, which are test-tube shaped extrusion moldings, are heated above the glass transition temperature of the polymer, and then positioned in a bott...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08K3/08
CPCB29C49/0005B29C49/06C08K3/08C08K2003/0881C08L67/02B29C2949/0715
Inventor XIA, ZHIYONG
Owner XIA ZHIYONG