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Method for increasing solid state polymerization rate of polyester polymers

A solid-state polymerization, polymer technology, applied in the direction of flexible coverings, transportation and packaging, rigid containers, etc., can solve the problems not mentioned, and achieve the effect of increasing the polymerization rate

Inactive Publication Date: 2005-02-09
INVISTA TECHNOLOG IES S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Again, antimony or germanium must be present, and solid state polymerization is not mentioned

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Using CAT-Method A, the catalyst zinc p-toluenesulfonate (TSAZ) (0.188g) was added to 300g with a viscosity of 0.197dL / g and 139eq / 10 6 g of COOH-terminated PET, in which PET is prepared by melt-phase polymerization without the use of catalysts. Using PF-Method-A, the PET / catalyst powder was granulated. Solid state polymerization was performed at 220 and 230°C using SSP-Method-A.

Embodiment 2

[0103] Using CAT-Method B, catalyst TSAZ (0.188g) was added to 300g with a viscosity of 0.178dL / g and 85eq / 10 6 g of COOH-terminated PET, in which PET is prepared by melt-phase polymerization without the use of catalysts. Using PF-Method-A, the PET / catalyst powder was granulated. Solid state polymerization was performed at 230°C using SSP-Method-A.

Embodiment 3

[0105] Using CAT-Method B, catalyst TSAZ (0.188g) was added to 300g with a viscosity of 0.210dL / g and 228eq / 10 6 g of COOH-terminated PET, in which PET is prepared by melt-phase polymerization without the use of catalysts. The PET / catalyst powder was granulated using PF-Method-A. Solid state polymerization was performed at 230°C using SSP-Method-A.

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PUM

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Abstract

This invention concerns a method for increasing the polymerization rate of polyester polymers in the solid state by adding a catalytic amount of zinc p-toluenesulfonate to a polyester polymer melt that is essentially free of antimony and germanium, before solid state polymerization.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to co-pending US Utility Patent Application Serial No. 10 / 128,784, filed April 22, 2002, and US Provisional Patent Application Serial No. 60 / 343,564, filed December 21, 2001. Background of the invention [0003] The present invention relates to the use of zinc p-toluenesulfonate as a catalyst in the preparation of polyester polymers, more specifically, the present invention relates to a process for improving solid-state polyester polymerization by adding zinc p-toluenesulfonate to polymer melts The method of the polymerization rate of the substance. [0004] Some production processes of bottle-grade polyethylene terephthalate (PET) currently use antimony(III) oxide (about 250-280 ppm Sb) as a polymerization catalyst. Typically, these processes require polymerization for 24 hours or longer under solid state polymerization conditions in order to obtain the necessary high intrinsic viscosit...

Claims

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Application Information

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IPC IPC(8): C08G63/83C08G63/80B65D1/00B65D65/02C08G
CPCC08G63/83Y10T428/1352C08G63/80C08G63/78C08K5/41
Inventor A·帕塔萨拉蒂
Owner INVISTA TECHNOLOG IES S A R L
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