Aqueous polyurethane emulsion for making waterproof strip and preparation method thereof
A technology of water-based polyurethane and waterproof strips, which is applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problems of few patents and literature reports for water-based polyurethane products, and achieve good waterproof and moisture permeability. The effect of low energy consumption and high bonding fastness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0043] The above-mentioned preparation method for making the aqueous polyurethane emulsion of waterproof strip, comprises the steps:
[0044] Put the polyol into the reaction kettle, dehydrate it under vacuum for 2 hours at 100-120°C, then lower the temperature to 70°C, add diisocyanate, hydrophilic chain extender, non-hydrophilic chain extender and catalyst, at 80-120°C React at 95°C for 2-4h, after the NCO content reaches the theoretical value, lower the reaction temperature to 30-40°C, add neutralizing agent for neutralization reaction, continue to react for 0.5-1h, add deionized water to emulsify and disperse , and finally add a chain extender containing active hydrogen, and stir for 0.5-1h to react to obtain the water-based polyurethane emulsion for making waterproof strips.
[0045] The catalyst is an organotin catalyst, added in an amount of 0-0.1% of the water-based polyurethane; the neutralizer is triethylamine, added in an amount of 2.5-7% of the water-based polyuret...
Embodiment 1
[0048] A kind of water-based polyurethane emulsion for making waterproof strip described in the present embodiment, its raw material composition is the water-based polyurethane and water that mass ratio is 0.76:1;
[0049] The raw material composition and weight percentage of described aqueous polyurethane are as follows:
[0050] (a) 24.1% by weight of diisocyanates (toluene diisocyanate and 1,6-hexamethylene diisocyanate);
[0051] (b) 68.7% by weight of polyols (polyethylene adipate-diethylene glycol ester diol and polytetrahydrofuran diol);
[0052] (c) 3.1 wt% non-hydrophilic chain extender (ethylene glycol);
[0053] (d) 4.1 wt% hydrophilic chain extender (dimethylolpropionic acid);
[0054] (e) 0% chain extender containing active hydrogen; the sum of the above raw materials is 100%;
[0055] The molar ratio of isocyanate groups to hydroxyl groups in the above raw materials is 1.2.
[0056] The above-mentioned preparation method for making the aqueous polyurethane em...
Embodiment 2
[0060] A kind of water-based polyurethane emulsion for making waterproof strip described in the present embodiment, its raw material composition is the water-based polyurethane and water that mass ratio is 0.51:1;
[0061] The raw material composition and weight percentage of described aqueous polyurethane are as follows:
[0062] (a) 22.5% by weight of diisocyanate (isophorone diisocyanate);
[0063] (b) 70.2 wt% of polyols (polybutylene adipate diol and polyoxyethylene diol);
[0064] (c) 2.0 wt% non-hydrophilic chain extender (1,4-butanediol);
[0065] (d) 3.9 wt% hydrophilic chain extender (dimethylolpropionic acid);
[0066] (e) 1.4% active hydrogen-containing chain extender (ethylenediamine); the sum of the above raw materials is 100%;
[0067] The molar ratio of isocyanate groups to hydroxyl groups in the above raw materials is 1.0.
[0068] The above-mentioned preparation method for making the aqueous polyurethane emulsion of waterproof strip, comprises the steps: ...
PUM
Property | Measurement | Unit |
---|---|---|
peel strength | aaaaa | aaaaa |
peel strength | aaaaa | aaaaa |
peel strength | 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, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com