Modified polyester and preparing method thereof
A modified polyester and modified technology, which is applied in the field of polyester, can solve problems such as large fluctuations in viscosity, low resin intrinsic viscosity, and poor crystallization performance, and achieve excellent crystallization performance, improved crystallization performance, and high molecular weight. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment
[0021] Put terephthalic acid and ethylene glycol into the esterification tank at a ratio of 1:0.7, and then add 0.01% catalyst (Sb 2 o 3 ), antioxidant 1% (1010, DLTP), carry out esterification reaction at 0.2MPA-0.4MPA, 210-260 ℃, when the distillate amount of esterification water reaches the target value, it is transferred to the polycondensation kettle, first Drop into SIPE-EG solution according to the required ratio, after the temperature in the still drops to below 230 ℃, drop into a certain amount of PEG again, PEG is 5% (percentage by weight) of terephthalic acid PTA content, heat while stirring, the At the same time, EG was distilled out. After 45 minutes, the temperature was raised to 260°C, and the vacuum was turned on. Under the pressure of 50Pa, 260°C-280°C, high vacuum polycondensation for 1.5-2.0 hours, when the intrinsic viscosity reached 0.40-0.50, the material was discharged, cast Tape, cut into pieces. Then, pre-crystallize the slices at 80-120°C under norm...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com