Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

PTT polyester with concentrated molecular weight distribution and preparation method thereof

A technology of molecular weight and polyester, which is applied in the field of chemical fiber processing, can solve problems such as end breakage and wool, and achieve the effects of avoiding deactivation, reducing time cost and capital cost, and improving PTT hue

Active Publication Date: 2020-07-03
ZHANGJIAGANG GLORY CHEM IND CO LTD +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technical system is mainly through the further increase to 0.90-1.00dl / g through the polycondensation stage after obtaining a higher viscosity (all public reports in the literature are above 0.20dl / g), and the prepared PTT polyester chips have a wide molecular weight distribution. Unfavorable effects such as broken ends and hairs caused by fiber forming process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PTT polyester with concentrated molecular weight distribution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The present embodiment provides a kind of production method of the PTT polyester of concentrated molecular weight distribution, and it comprises the following steps:

[0047] (1) Preparation of PTT polyester prepolymer: mix terephthalic acid and 1,3-propanediol with a molar ratio of 1:1.1 for beating, and add titanium tin cobalt composite catalyst and anti-ether agent sodium acetate for esterification Reaction until the esterification water output reaches 95% of the theoretical esterification water output, the reactor pressure is released to normal pressure, and the reaction is continued for 15 minutes to obtain a PTT polyester prepolymer with low intrinsic viscosity;

[0048] Wherein, the titanium-tin-cobalt composite catalyst is composed of tetrabutyl titanate, dibutyltin oxide and cobalt acetate with a molar ratio of 1:0.5:0.5, and the addition amount of the titanium-tin-cobalt composite catalyst is terephthalic acid 100ppm of the mass fraction of (PTA); The addition...

Embodiment 2

[0059] The present embodiment provides a kind of production method of the PTT polyester of concentrated molecular weight distribution, and it comprises the following steps:

[0060] (1) Preparation of PTT polyester prepolymer: mix terephthalic acid and 1,3-propanediol in a molar ratio of 1:1.5 for beating, and add titanium tin cobalt composite catalyst and anti-ether agent sodium acetate for esterification Reaction until the esterification water output reaches 95% of the theoretical esterification water output, the reactor pressure is released to normal pressure, and the reaction is continued for 30 minutes to obtain a low intrinsic viscosity PTT polyester prepolymer;

[0061] Wherein, the titanium-tin-cobalt composite catalyst is composed of tetrabutyl titanate, indium tin oxide and cobalt acetate with a molar ratio of 1:0.5:0.5, and the addition amount of the titanium-tin-cobalt composite catalyst is terephthalic acid (PTA ) of the mass fraction of 150ppm; the addition of so...

Embodiment 3

[0071] The present embodiment provides a kind of production method of the PTT polyester of concentrated molecular weight distribution, and it comprises the following steps:

[0072] (1) Preparation of PTT polyester prepolymer: mix terephthalic acid and 1,3-propanediol with a molar ratio of 1:1.3 for beating, and add titanium tin cobalt composite catalyst and anti-ether agent sodium acetate for esterification Reaction, until the esterification water output reaches 95% of the theoretical esterification water output, the reactor pressure is released to normal pressure, and the reaction is continued for 35 minutes to obtain a low intrinsic viscosity PTT polyester prepolymer;

[0073] Among them, the titanium-tin-cobalt composite catalyst is composed of metatitanic acid, indium tin oxide and cobalt acetate in a molar ratio of 1:1:1, and the addition amount of the titanium-tin-cobalt composite catalyst is 1 / 4 of terephthalic acid (PTA). 150ppm of the mass fraction; the addition of s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Intrinsic viscosityaaaaaaaaaa
Intrinsic viscosityaaaaaaaaaa
Strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides PTT polyester with concentrated molecular weight distribution and a preparation method thereof. The preparation method comprises the following steps: 1, mixing terephthalic acidand 1,3-propylene glycol according to a molar ratio of 1: (1.1-1.5), carrying out pulping, then adding a titanium-tin-cobalt composite catalyst, carrying out an esterification reaction, releasing a reaction pressure to normal pressure after the water yield of esterification reaches 95% of the theoretical water yield of esterification, and continuing the reaction for 15-45 min to prepare a PTT polyester prepolymer; 2, mixing the PTT polyester prepolymer with a 1,3-propylene glycol monomer according to a molar ratio of 1: (1.05-1.10), carrying out a homogenization reaction, and sequentially carrying out a stirring pre-polycondensation reaction and a final polycondensation reaction to prepare the PTT polyester with concentrated molecular weight distribution, wherein the intrinsic viscosity of the PTT polyester prepolymer is less than or equal to 0.15 dl / g, and the addition amount of the titanium-tin-cobalt composite catalyst is 100-200 ppm of the mass fraction of the terephthalic acid.

Description

technical field [0001] The invention belongs to the field of chemical fiber processing, and relates to a PTT polyester with concentrated molecular weight distribution and a preparation method thereof. Background technique [0002] Polytrimethylene terephthalate (PTT), a new type of organic polymer aromatic polyester product belonging to the same polymer series as PET and PBT. As a new type of polyester product, PTT has excellent properties. PTT has good processability, electrical properties, mechanical properties and dimensional stability. PTT fiber maintains the excellent wrinkle resistance and chemical resistance of PET fiber, and its strength meets the textile requirements. Excellent dyeing performance is very attractive to the dyeing and finishing of fiber textiles, and it is powerful in improving economic and environmental benefits. In addition, it also has excellent flexibility, sunlight resistance, stain resistance, low static electricity, low water absorption, etc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G63/183C08G63/78C08G63/82C08G63/85D01F8/14
CPCC08G63/183C08G63/85C08G63/826C08G63/785D01F8/14Y02P70/62
Inventor 严建华韩冰
Owner ZHANGJIAGANG GLORY CHEM IND CO LTD
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com