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Process for making polycyclohexane dimethylene terephthalate copolymer from polyethylene terephthalate, compositions and articles thereof

A technology of cyclohexane dimethylene terephthalate and polyethylene terephthalate, applied in the field of manufacturing polyethylene terephthalate, can solve the shortage of Availability etc.

Inactive Publication Date: 2011-12-07
SABIC INNOVATIVE PLASTICS IP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although useful to many consumers, conventional PCT molding compositions are generally not made from recycled sources of PCT due to the lack of availability of bulk post-consumer or post-industrial supplies of PCT waste material

Method used

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  • Process for making polycyclohexane dimethylene terephthalate copolymer from polyethylene terephthalate, compositions and articles thereof
  • Process for making polycyclohexane dimethylene terephthalate copolymer from polyethylene terephthalate, compositions and articles thereof
  • Process for making polycyclohexane dimethylene terephthalate copolymer from polyethylene terephthalate, compositions and articles thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] Table 1 lists the components used in the examples.

[0069] Table 1

[0070] abbreviation

illustrate

supplier

PET-r

Recycled poly(1,4-ethylene terephthalate) pellets

Futura Polyesters

TPT

Titanium tetraisopropoxide

DuPont

CHDM

1,4-Cyclohexanedimethanol

Eastman

[0071] Synthesis of modified PCT from recycled PET, pilot plant method (Pilot Plant).

[0072] On a larger scale, modified polycyclohexane dimethylene terephthalate copolymers are derivatized from polyethylene terephthalate components in a helicone reactor. The helical reactor has a capacity of 40 liters and is fitted with specially designed pairs of oppositely arranged helical blades with a twist of 270 degrees; constructed of 316SS (stainless steel) with a 16g polished finish. The blade speed can be from 1 to 65 rpm. The stirrer was connected to a 7.5HP Constant Torque Inverter Duty Motor operating at 230 / 460VAC, 3PH and 60Hz. These sti...

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PUM

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Abstract

A method comprising: heating cyclohexanedimethanol and polyethylene terephthalate components at a first temperature under an inert atmosphere at a first pressure of at least 101 kPa, the polyethylene terephthalate the glycol formate component is selected from polyethylene terephthalate and polyethylene terephthalate copolymers, thereby forming a molten mixture; and under stirring, and at a second temperature higher than the first temperature Heating the molten mixture at a second temperature and a second pressure below atmospheric pressure for a period of time and under conditions effective to form a modified polycyclohexane comprising at least one residue derived from a polyethylene terephthalate component Dimethylene terephthalate copolymer.

Description

Background of the invention [0001] The present invention relates to a method for producing poly(cyclohexane dimethylene terephthalate) from polyethylene terephthalate, as well as compositions and articles thereof. [0002] Polycyclohexane dimethylene terephthalate (PCT) is a crystalline thermoplastic polymer with inherently high heat resistance characteristics (Tm = 295°C). It is currently used in lead-free soldering, medical, food, and automotive applications. Although useful to many consumers, conventional PCT molding compositions are generally not made from recycled sources of PCT due to the lack of availability of bulk post-consumer or post-industrial supplies of PCT waste material. Polyethylene terephthalate (PET), unlike PCT, is manufactured in much larger quantities and is more easily recycled from consumer waste. [0003] As the need to preserve non-renewable resources and more efficiently recycle underutilized scrap PET increases, people are looking for improved, lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78
CPCC08G63/916C08G63/80C08G63/183C08G63/85C08G63/78C08J5/00C08L67/03
Inventor 加尼什.坎南
Owner SABIC INNOVATIVE PLASTICS IP BV
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