Self-emulsifying waterborne polyurethane curing agent and preparation method thereof
A water-based polyurethane, self-emulsifying technology, applied in the directions of polyurea/polyurethane adhesive, polyurea/polyurethane coating, sulfonic acid preparation, etc. The effect of high effective functionality, wide application range and low viscosity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0042] A preparation method of self-emulsifying type water-based polyurethane curing agent, comprising the following steps:
[0043] a) Preparation of small-molecule diols containing sulfonic acid groups: use small-molecule diols and dicarboxysulfonates as raw materials, or use small-molecule dicarboxylic acids, dihydroxysulfonates and small-molecule diols as The raw material is obtained through esterification reaction to obtain a small molecule diol containing sulfonic acid groups with a molecular weight of 350-1000, which is dissolved in an organic solvent to obtain a spare material A;
[0044] b) Preparation of diisocyanate prepolymer containing sulfonic acid groups: use diisocyanate, organic solvent and the spare material A obtained in step a) in the amount of 0wt%~80wt% according to the formula, and react to prepare diisocyanate prepolymer containing sulfonic acid groups. Isocyanate prepolymers;
[0045] c) Preparation of sulfonic acid group-modified polyurethane prepoly...
Embodiment 1
[0073] a. Preparation of small molecular diols containing sulfonic acid groups
[0074] In a four-necked flask equipped with a fractionation device, add 100g of isophthalic acid-5-sodium sulfonate, 92.5g of 1,4-butanediol, 80g of deionized water and 0.161g of tetrabutyl titanate, nitrogen protection, Reflux at 160°C for 2 hours, then raise the temperature by 10°C every 0.5 hours, collect fractions in the water separator until the temperature reaches 210-220°C, keep it warm for 1 hour, vacuumize at 220°C and 1KPa for 2 hours, cool down to 100°C, add 100g of ethyl acetate was stirred evenly, then the temperature was lowered to 60°C, and the material was discharged; 52g of the spare material A of the formula was weighed.
[0075] b. Preparation of sulfonic acid group-modified HDI prepolymer with NCO groups at both ends
[0076] In a three-necked reaction flask, add 140g HDI and 46g ethyl acetate, stir evenly, add 40g spare material A, react at 60-70°C for 1 hour, then rise to 90...
Embodiment 2
[0082] a. Preparation of raw materials A
[0083] The small molecular dihydric alcohol containing sulfonic acid group was prepared according to the method of step a of Example 1.
[0084] In the spare material preparation bottle, add 49.2g of small molecule diols with a molecular weight of 600 containing sulfonic acid groups and 21g of butyl acetate, stir and dissolve evenly, and prepare 70g of spare material A.
[0085] b. Preparation of sulfonic acid group-modified HDI prepolymer with NCO groups at both ends
[0086] In the three-necked reaction flask, add 184g HDI and 64g butyl acetate, stir evenly, add 52g spare material A, react at 60-70°C for 1 hour, then rise to 90-100°C for 4 hours.
[0087] c. Preparation of sulfonic acid group-modified HDI biuret with multifunctional NCO group at the end
[0088] Lower the temperature below 70°C, first add 3g of water, react at 70°C for 0.5 hours, then raise the temperature to 80-90°C for 2 hours, then raise the temperature to 120-...
PUM
Property | Measurement | Unit |
---|---|---|
viscosity | aaaaa | aaaaa |
impact strength | aaaaa | aaaaa |
luster | 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