Method for preparing polyester thermosol
A polyester hot-melt adhesive and prepolymer technology, applied in adhesives, etc., can solve problems such as low recycling value, environmental pollution, and increased product costs, and achieve the effects of reducing waste water discharge, reducing costs, and ensuring stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Example Embodiment
[0028] Example 1
[0029] Terephthalic acid (199.2g) and 1,4-butanediol (140.4g) were added into a 1.0L beating kettle, and after stirring and beating, nitrogen was continuously pressed into the 1.0L esterification kettle (3g / min). The kettle is equipped with a stirring and temperature measuring system, a rectification column and a reflux condenser, and ethylene terephthalate prepolymer (40g, molecular weight 500-600) and titanium / tin composite catalyst are pre-filled in the kettle [C 4 H 9 OSnOOH / Ti(OOC 4 H 9 ) 4 =1] (0.36g), the temperature in the control still under normal pressure is 195 DEG C to carry out an esterification, the generated water is recovered through the rectification system, the rectification reflux ratio is 3.5, and the column top vapor temperature is 100 DEG C, After the slurry is added, the reaction is continued until the vapor phase temperature at the top of the column drops significantly, and the primary esterification reaction ends.
[0030] Afte...
Example Embodiment
[0032] Example 2
[0033] Put terephthalic acid (199.2g), 1,4-butanediol (135g) and ethylene glycol (12.4g) into a 1.0L beating kettle. After stirring and beating, continuously press in with nitrogen (3g / min) In the 1.0L esterification kettle, ethylene terephthalate prepolymer (MW500) (45g) and titanium / tin composite catalyst [C 4 H 9 OSnOOH / Ti(OOC 3 H 7 ) 4 =1] (0.28g), the temperature in the esterification kettle is controlled to be 175°C under normal pressure, the reflux ratio of the rectification system is about 3.5, the vapor phase temperature at the column top is 100°C, and the slurry is added and the reaction is continued until the top of the column. When the vapor phase temperature drops significantly, the first esterification reaction ends.
[0034] After adding isophthalic acid (179.2g), azelaic acid (18.8g), 1,4-butanediol (90g) and 1,4-cyclohexanedimethanol (30g) to the beating kettle, stirring and beating, nitrogen It was continuously pressed into the above-...
Example
[0036] Examples 3 to 8
[0037] According to the same steps and conditions of Example 1, the difference is that the ratio of the raw materials used is shown in Table 1, and the characteristic parameters of the obtained product are also listed in Table 1.
[0038] Table 1 Material ratio and product performance of Examples 3-8 (in Table 1, the material ratio is in mole percent)
[0039] Example number
[0040] Zinc acetate
PUM
Property | Measurement | Unit |
---|---|---|
Melt index | aaaaa | aaaaa |
Initial peel strength | aaaaa | aaaaa |
Melting temperature | 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.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap