Method for preparing isobutyl aldehyde modified urea-formaldehyde resin adhesive
A technology of urea-formaldehyde resin and isobutyraldehyde, applied in adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., to achieve good initial tack, low free formaldehyde content, and improved weather resistance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0028] Add the first batch of 1000kg of urea and 2400kg of 37% industrial formaldehyde to a 5 cubic meter reactor, stir and raise the temperature. After the urea is completely dissolved, adjust the pH to 7-8 with a 20-30% sodium hydroxide aqueous solution, and raise the temperature to React at 90°C for 40 minutes; adjust the pH to 3-4 with 30-50% dilute sulfuric acid. When the temperature is lowered to 80°C, add the second batch of 400kg of urea. After stirring, add 400kg isobutyraldehyde gradually, keep the temperature at 80°C for 60 minutes ; Add the third batch of 250kg urea, keep the temperature at 60℃ and stir for 40min; add the fourth batch of 200kg urea, stir for 20min, adjust the pH to 7-8 with 20-30% sodium hydroxide aqueous solution, and cool to below 40℃, Discharge to obtain isobutyraldehyde modified urea-formaldehyde resin wood adhesive.
Embodiment 2
[0030] Add the first batch of 1000kg of urea and 2000kg of 37% industrial formaldehyde to a 5 cubic meter reactor, stir and raise the temperature. After the urea is completely dissolved, adjust the pH to 7-8 with triethanolamine, and raise the temperature to 85°C for 60min reaction; Adjust the PH value to 3-4. When the temperature is lowered to 70℃, add the second batch of 300kg urea. After stirring evenly, gradually add 350kg isobutyraldehyde, keep at 70℃ and react for 40min; add the third batch of 250kg urea, keep the temperature at 60℃ and stir. Reaction for 60min; add the fourth batch of 150kg urea, stir for 20min, adjust the pH to 7-8 with triethanolamine, cool to below 40°C, and discharge to obtain an isobutyraldehyde modified urea-formaldehyde resin wood adhesive.
Embodiment 3
[0032] Add the first batch of 1000kg of urea and 2600kg of 37% industrial formaldehyde to a 5 cubic meter reactor, stir and raise the temperature. After the urea is completely dissolved, adjust the pH to 7-8 with 20-30% sodium hydroxide aqueous solution, and heat to React at 85°C for 60 minutes; adjust the pH to 3-4 with formic acid. When the temperature is lowered to 80°C, add the second batch of 300kg urea. After stirring evenly, gradually add 500kg isobutyraldehyde and react at 80°C for 40 minutes; add the third batch of 250kg Urea, keep the temperature at 70℃ and stir for 40min; add the fourth batch of 150kg urea, stir for 20min, adjust the pH value to 7-8 with 20-30% sodium hydroxide aqueous solution, cool to below 40℃, discharge to obtain isobutyraldehyde Modified urea-formaldehyde resin wood adhesive.
PUM

Abstract
Description
Claims
Application Information

- Generate Ideas
- Intellectual Property
- Life Sciences
- Materials
- Tech Scout
- Unparalleled Data Quality
- Higher Quality Content
- 60% Fewer Hallucinations
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com