Nano cellulose whisker grafted water-diluted photocuring PUV (polyurethane acrylate) resin, and preparation and application thereof
A nanocellulose, water dilution technology, applied in the field of coatings, can solve problems such as poor mechanical properties, and achieve the effects of good mechanical properties, good adhesion, good storage stability and water resistance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0046] Example 1
[0047] In this embodiment, the molar ratio of hydroxypropyl acrylate to pentaerythritol triacrylate is 2:3, and the mass of nanocellulose whiskers accounts for 0.5% of the total mass of the final PUA resin solids.
[0048] (1) Synthesis of polyurethane prepolymer I: In a dry four-necked flask equipped with a stirrer and a thermometer, 28.7g of toluene-2,4-diisocyanate (TDI-80) and 27.5g of polyoxypropylene glycol (Mw =1000), add 0.056g of catalyst dibutyltin dilaurate dropwise, the reaction is carried out in a constant temperature water bath, the temperature is raised to 85℃, and the reaction is maintained at this temperature for about 1.5h. The NCO value by di-n-butylamine titration reaches or is slightly lower than theoretical When the value is reached, a semi-terminated polyurethane prepolymer I is obtained;
[0049] (2) Synthesis of polyurethane prepolymer II: Cool down to 65°C, weigh 9.3g of dimethylolpropionic acid (DMPA), dissolve it with 27.9g of acetone, ...
Example Embodiment
[0054] Example 2
[0055] In this embodiment, the molar ratio of hydroxypropyl acrylate to pentaerythritol triacrylate is 2:3, and the mass of nanocellulose whiskers accounts for 2.5% of the total mass of the final PUA resin solids.
[0056] (1) Synthesis of polyurethane prepolymer I: 30.1g of toluene-2,4-diisocyanate (TDI-80) and 28.8g of polyoxypropylene glycol (Mw) were added to a dry four-necked flask equipped with a stirrer and a thermometer. =1000), add 0.059g of the catalyst dibutyltin dilaurate dropwise, the reaction is carried out in a constant temperature water bath, the temperature is raised to 85℃, and the reaction is maintained at this temperature for about 1.5h. The NCO value by di-n-butylamine titration reaches or is slightly lower than the theoretical value When the value is reached, a semi-terminated polyurethane prepolymer I is obtained;
[0057] (2) Synthesis of polyurethane prepolymer II: Cool to 65°C, weigh 9.8g of dimethylolpropionic acid (DMPA), dissolve it wi...
Example Embodiment
[0062] Example 3
[0063] In this embodiment, nanocellulose whiskers are added to react with polyurethane prepolymer I, and then with dimethylolpropionic acid. The molar ratio of hydroxypropyl acrylate to pentaerythritol triacrylate is 2:3, and nanocellulose The weight of the whiskers accounts for 2.5% of the total mass of the final PUA resin solids.
[0064] Preparation:
[0065] (1) Synthesis of polyurethane prepolymer I: 30.1g of toluene-2,4-diisocyanate (TDI-80) and 28.8g of polyoxypropylene glycol (Mw) were added to a dry four-necked flask equipped with a stirrer and a thermometer. =1000), add 0.059g of the catalyst dibutyltin dilaurate dropwise, the reaction is carried out in a constant temperature water bath, the temperature is raised to 85℃, and the reaction is maintained at this temperature for about 1.5h. The NCO value by di-n-butylamine titration reaches or is slightly lower than the theoretical value When the value is reached, a semi-terminated polyurethane prepolymer I...
PUM
Property | Measurement | Unit |
---|---|---|
Particle size | 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