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Process for preparing poly(alkylene terephthalate) using in-situ titanium-containing catalyst and compositions derived therefrom

A technology of polyalkylene terephthalate, alkylene phthalate, applied in the preparation of poly(alkylene terephthalate) and combinations derived therefrom using an in-situ titanium-containing catalyst It can solve the problems of unstable phosphite and unsatisfactory application of phosphite stabilizer.

Active Publication Date: 2018-02-23
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of phosphite stabilizers is unsatisfactory due to the tendency for phosphites to be unstable both on hydrolysis and oxidation

Method used

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  • Process for preparing poly(alkylene terephthalate) using in-situ titanium-containing catalyst and compositions derived therefrom
  • Process for preparing poly(alkylene terephthalate) using in-situ titanium-containing catalyst and compositions derived therefrom
  • Process for preparing poly(alkylene terephthalate) using in-situ titanium-containing catalyst and compositions derived therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0098] Embodiment 1: A thermoplastic composition having improved hydrostability, comprising: 50 to 99.9 weight percent polyalkylene terephthalate, wherein the polyalkylene terephthalate Contains 50 to 300ppm tetra(C) titanate 1 -C 8 Alkyl) esters and 100 to 600 ppm of phosphorus-containing compounds, both based on the total amount of titanium present, wherein the phosphorus-containing compounds are selected from the group consisting of phosphoric acid, poly(phosphoric acid), phosphorous acid, monobutyl phosphate, dibutyl phosphate , a phosphorus-containing compound selected from the group consisting of monoalkyl phosphate, dialkyl phosphate, and combinations thereof; 0 to 60 weight percent reinforcing filler; and 0.05 to 5 weight percent chain extender; and wherein, No quencher for the catalyst complex is added to the compounded thermoplastic composition; wherein the polyalkylene terephthalate is not produced from recycled polyethylene terephthalate; and wherein , all weight...

Embodiment approach 2

[0099] Embodiment 2: The thermoplastic composition of Embodiment 1, wherein the polyalkylene terephthalate is polybutylene terephthalate.

Embodiment approach 3

[0100] Embodiment 3: the thermoplastic composition of Embodiment 1 or 2, wherein tetra(C) titanate 1 -C 8 The alkyl) ester is tetraisopropyl titanate and the phosphorus-containing compound is phosphoric acid.

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Abstract

Disclosed is a process for the manufacture of a polyalkylene terephthalate such as polybutylene terephthalate. In particular, the process comprises employing a titanium-containing catalyst formed by the reaction product of tetraalkyl titanate and a complexing agent comprising a phosphorous, nitrogen or boron atom. The process is used to prepare polyalkylene terephthalates characterized by improved hydrostability, as well as compositions derived therefrom.

Description

technical field [0001] Processes for preparing polyalkylene terephthalates such as polybutylene terephthalate are disclosed. In particular, the method involves the use of a titanium-containing catalyst formed by the reaction product of a tetraalkyl titanate and a complexing agent comprising phosphorus, nitrogen or boron atoms. The process is useful for the preparation of polyalkylene terephthalates, and compositions derived therefrom, which are characterized by improved water stability. Background technique [0002] Polybutylene terephthalate (PBT) resins are well known polyalkylene terephthalates that are semi-crystalline and possess a variety of desirable properties (alone or in blends). Compared to amorphous resins such as acrylonitrile-butadiene-styrene (ABS), polycarbonate and polystyrene, semi-crystalline resins such as PBT can show Higher solvent resistance, strength, and hardness. PBT resin is used in many applications where its solvent resistance, strength, rigid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/16C08G63/78C08G63/82C08G67/02
CPCC08G63/183C08G63/85C08G63/87C08G63/916
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