Method for preparing acid-resistance polyurethane-acrylic resin retanning agent
A technology of acrylic resin and polyurethane, which is applied in the field of preparation of leather chemical additives. It can solve the problems of insufficient molecular weight, limited wide use, flat and thin leather, etc., to achieve reduced chromium salt content, excellent performance-price ratio, and fine grain Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0013] Dry the 250ml four-necked bottle, stirrer, feeding tube and other instruments at 120°C for 2 hours, take it out and place it in a desiccator to cool. Add 20.0g of polyoxyethylene ether with a molecular weight of 1,000 and a vinyl end to a 250ml four-necked bottle with a stirrer and a thermometer, heat it to 80°C while stirring, add 0.01g of dibutyltin dilaurate, stir and mix for 10 Minutes, then 3.48 g of toluene diisocyanate (TDI) was added dropwise. After reacting for 2 hours, 20.0 g of polyoxyalkylene ether with a molecular weight of 1,000 was added, and the reaction was continued for 2 hours. Then cool to 30° C. and discharge to obtain a polymerizable nonionic polyurethane oligomer.
[0014] Add 15.0g of acrylic acid and 30.0g of distilled water into a 250ml four-necked bottle with a stirring and condenser, stir and mix evenly, then slowly add a 20% sodium hydroxide solution dropwise to adjust the pH value to 4.0, during which the reaction liquid is controlled The...
Embodiment 2
[0016] Dry the 250ml four-necked bottle, stirrer, feeding tube and other instruments at 120°C for 2 hours, take it out and place it in a desiccator to cool. Add 8.0g of polyoxyethylene ether with a molecular weight of 400 and vinyl end to a 250ml four-necked bottle equipped with a stirrer and a thermometer, heat to 75°C under stirring, add 0.02g of dibutyltin dilaurate, stir and mix for 10 Minutes, then 3.48 g of toluene diisocyanate (TDI) was added dropwise. After reacting for 2 hours, 8.0 g of polyoxypropylene ether with a molecular weight of 400 was added, and the reaction was continued for 2 hours. Then it is cooled to 30°C and discharged to obtain a polymerizable nonionic polyurethane oligomer.
[0017] Add 32.0g of methacrylic acid and 40.0g of distilled water into a 250ml four-necked bottle with stirring and condenser, stir and mix evenly, then slowly add a concentration of 30% sodium hydroxide solution dropwise, adjust the pH value to 5.5, and control The temperature...
Embodiment 3
[0019] Dry the 250ml four-necked bottle, stirrer, feeding tube and other instruments at 120°C for 2 hours, take it out and place it in a desiccator to cool. Add 10.0g of polyoxyethylene ether with a molecular weight of 1,000 and a vinyl end to a 250ml four-neck bottle equipped with a stirrer and a thermometer, heat to 70°C while stirring, add 0.02g of dibutyltin dilaurate, stir and mix for 10 Minutes, then 1.74 g of toluene diisocyanate (TDI) was added dropwise. After reacting for 2 hours, 20.0 g of polyoxypropylene ether with a molecular weight of 2,000 was added, and the reaction was continued for 2 hours. Then it is cooled to 30°C and discharged to obtain a polymerizable nonionic polyurethane oligomer.
[0020] Add 12.0g of acrylic acid, 6.0g of methacrylic acid and 30.0g of distilled water into a 250ml four-neck bottle with stirring and condenser, stir and mix evenly, then slowly add potassium hydroxide solution with a concentration of 20% to adjust the pH value 6.0, dur...
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