Waterborne polyurethane dispersion and application thereof
High molecular weight waterborne polyurethane dispersions prepared by specific compositions solve the problems of insufficient storage stability and initial heat resistance at low temperatures, and achieve improved stability and heat resistance in low-temperature environments, making them suitable for coatings, adhesives, sealants and inks.
Patent Information
- Application Number
- CN202411248078.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2026-03-10
AI Technical Summary
Existing waterborne polyurethane adhesives exhibit poor storage stability at low temperatures, with a sharp increase in viscosity and insufficient initial heat resistance, affecting their use and bonding strength in colder climates.
A high molecular weight waterborne polyurethane dispersion was prepared by using a combination of crystalline polyols, polyisocyanates, hydrophilic compounds containing NCO reactive functional groups, small molecule alcohols, and isocyanate reactive compounds. Aliphatic alcohol esters were added to improve stability and heat resistance.
It maintains the stability of dispersion emulsions under low-temperature conditions, provides good initial heat resistance, meets the needs of downstream applications, reduces transportation and storage risks, and ensures the heat resistance of adhesive composites.