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Improved process for the preparation of modified poly(alkylene terephthalate) employing an in-situ titanium-containing catalyst

A technology of alkylene phthalate and polyethylene terephthalate is applied in the improved field of preparing modified poly(alkylene terephthalate) by using an in-situ titanium-containing catalyst, and can solve the problem of inconvenience. Hope for catalytic activity and other issues

Active Publication Date: 2016-03-30
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] This approach solves the problems described in the prior art regarding undesired post-polymerization catalytic activity

Method used

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  • Improved process for the preparation of modified poly(alkylene terephthalate) employing an in-situ titanium-containing catalyst
  • Improved process for the preparation of modified poly(alkylene terephthalate) employing an in-situ titanium-containing catalyst
  • Improved process for the preparation of modified poly(alkylene terephthalate) employing an in-situ titanium-containing catalyst

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Experimental program
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Effect test

Embodiment approach 1

[0106] Embodiment 1: a kind of method that prepares modified polyalkylene terephthalate by the polyethylene terephthalate that reclaims, described method comprises: Form four (C 1 -C 8 A catalyst consisting of the reaction product of an alkyl) titanate and a complexing agent selected from the group consisting of phosphorus-containing compounds, nitrogen-containing compounds, boron-containing compounds, and combinations thereof, wherein the complexing agent with the four (C 1 -C 8 The molar ratio of alkyl) titanate is about 0.2:1 to 0.90:1; in the presence of said catalyst by combining the recycled polyethylene terephthalate with the selected from C 2 -C 4 Dibasic alcohols of the group consisting of alkylene glycols combine to depolymerize recycled polyethylene terephthalate to obtain a molten mixture; in the catalyst and C 3 -C 4 transesterifying the depolymerized recycled polyethylene terephthalate in the continued presence of an alkylene glycol, wherein the alkylene gly...

Embodiment approach 2

[0107] Embodiment 2: The method of embodiment 1, wherein the catalyst is made prior to depolymerization.

Embodiment approach 3

[0108] Embodiment 3: The method according to Embodiment 1 or 2, wherein the catalyst is passed through the di Tetra(C 1 -C 8 Alkyl) titanate and complexing agent combined, and synthesized in situ.

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Abstract

Disclosed is an improved process for preparing a modified polyalkylene terephthalate by melt polycondensation followed optionally by solid state condensation comprising reacting an alkylene diol and polyethylene terephthalate, wherein polymerization occurs in the presence of a catalyst complex formed by reaction of tetra(alkyl) titanate and a compound selected from phosphorus-containing compounds, nitrogen-containing compounds, boroncontaining compounds, and combinations thereof.

Description

technical field [0001] A process for preparing modified polyalkylene terephthalates by melt polycondensation, optionally followed by solid state condensation is disclosed. The method comprises reacting an alkylene glycol with polyethylene terephthalate, wherein the polymerization occurs in the presence of a catalyst complex consisting of a tetra(alkyl) titanate and selected Formed from the reaction of phosphorus-containing compounds, nitrogen-containing compounds, boron-containing compounds, and combinations thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a well known semi-crystalline resin with desirable properties. Compared with amorphous resins such as ABS, polycarbonate and polystyrene, semi-crystalline resins such as PBT show much better solvent resistance, higher Strength, and higher rigidity. PBT resins are used in many applications where their solvent resistance, strength, lubricity, and rigidity are required, such as for durable goods f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78C08J11/10C08J11/16C08G63/88C08G63/82
CPCC08G63/183C08G63/85C08J11/16C08J11/24C08J2367/02C08K5/103C08K5/372Y02W30/62C08K3/014C08L67/02C08L69/00
Inventor 胡斯努·艾尔普·艾利德代奥卢丁天华加内什·卡纳安
Owner SABIC GLOBAL TECH BV