Method for synthesizing biodegradable aliphatic-aromatic copolyester
A technology for degrading fats and aromatics, applied in the field of polyester, can solve the problems of poor hydrolysis resistance, lower thermal stability, and inability to add and mix chain extenders conveniently, so as to reduce side reactions and reduce product terminal carboxyl groups value, to solve the effect of increasing the b value of resin color
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0057] Example 1
[0058] 1) 23kg / h of terephthalic acid and 28kg / h of 1,4-butanediol are continuously added to the beating kettle and mixed, the mixed slurry is continuously fed into the esterification reactor, and In addition, 12kg / h of 1,4-butanediol and 0.015kg / h of tetrabutyl titanate (TBOT) were added, and the pressure of the reactor was controlled to -10KPa, the temperature was 220°C, and the residence time was 2 hours. The water produced by the reaction, Tetrahydrofuran and butanediol were distilled off, and the obtained esterified compound A was continuously removed from the reactor. The content of the terminal carboxyl group of the esterified compound A was 180 mol / t.
[0059] 2) 22kg / h of adipic acid and 25kg / h of 1,4-butanediol are continuously added to the beating kettle and mixed, the mixed slurry is continuously fed into the esterification reaction kettle, and Add 10kg / h of 1,4-butanediol and 0.001kg / h of tetrabutyl titanate (TBOT) at a temperature of 200°C and a re...
Example Embodiment
[0061] Example 2
[0062] 25kg / h of terephthalic acid, 23kg / h of adipic acid, 36kg / h of 1,4-butanediol were continuously added to the beating kettle and mixed, and then the mixed slurry was continuously fed to In the esterification reactor. Another way is to continuously add 7kg / h of 1,4-butanediol and 0.02kg / h of tetrabutyl titanate (TBOT) into the esterification reactor, and esterify at a temperature of 220°C and a pressure of -20KPa, and stay After 2h, water, tetrahydrofuran and butanediol were distilled off. The terminal carboxyl group content of the obtained esterified product was 120 mol / t.
[0063] Then continuously enter the two pre-polycondensation reactors connected in series, add tetrabutyl titanate 0.02kg / h at the same time, and add epoxy soybean oil (epoxy value 6.0%) 2.4kg / h at the same time. The material temperature is changed from 210°C. The pressure of the reactor was reduced from 20KPa to 200Pa, the residence time was 2h, and the excess butanediol was distilled...
Example Embodiment
[0065] Example 3
[0066] 25kg / h of terephthalic acid, 23kg / h of adipic acid, 36kg / h of 1,4-butanediol were continuously added to the beating kettle and mixed, and then the mixed slurry was continuously fed to In the esterification reactor. Another way is to continuously add 7kg / h of 1,4-butanediol and 0.02kg / h of tetrabutyl titanate (TBOT) into the esterification reactor, and esterify at a temperature of 220°C and a pressure of -20KPa, and stay After 2h, water, tetrahydrofuran and butanediol were distilled off. The terminal carboxyl group content of the obtained esterified product was 120 mol / t.
[0067] Then continuously enter the two pre-polycondensation reactors connected in series, add tetrabutyl titanate 0.02kg / h at the same time, add epoxy soybean oil (epoxy value 6.0%) 0.24kg / h at the same time, the material temperature is changed from 200℃, The pressure of the reactor was reduced from 20KPa to 200Pa, the residence time was 2.5h, the excess butanediol was distilled off, ...
PUM
Property | Measurement | Unit |
---|---|---|
Intrinsic viscosity | aaaaa | aaaaa |
Intrinsic viscosity | aaaaa | aaaaa |
Intrinsic viscosity | aaaaa | aaaaa |
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.
© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap