Method for preparing high solid content aqueous polyurethane emulsion by continuous process
A technology of water-based polyurethane and polyurethane emulsion, which is applied in the field of high-solid content and low-viscosity sulfonic acid-type anionic water-based polyurethane emulsion, can solve the problems of low solid content of water-based polyurethane emulsion products, and achieve good heat resistance and high initial bonding strength Effect
Inactive Publication Date: 2008-12-24
ANHUI UNIVERSITY +1
0 Cites 21 Cited by
AI-Extracted Technical Summary
Problems solved by technology
View more
Abstract
The invention provides a method for preparing water-borne polyurethane emulsion with high solid content by the continuous method. The method comprises the following steps that: oligomer polylol after vacuum dehydration, isocyanate, a chain extender, a solvent and a catalyst are added into a reactor at a time under the protection of dry nitrogen; the mixture is mechanically stirred and simultaneously controlled at a certain temperature for reaction to a certain degree; the system temperature is reduced to between 20 and 50 DEG C; the hydrophilic chain extender is slowly dripped into a prepolymer which is then added with the solvent so as to prevent gel coagulation caused by overlarge viscosity; the isocyanate-based NCO content in the prepolymer which is generated through reaction is not changed again; and the prepolymer is added with water again to perform emulsion dispersion and undergoes vacuum distillation to remove the solvent, and then the water-borne polyurethane solution is prepared. The water-borne polyurethane solution prepared by the method has high solid content, low viscosity, large initial bonding strength, and good heat resistance, can be used as textile fabric coating agent, shoe coating agent, leather finishing agent, and adhesives used in the fields of wood, architecture, automobile, paper-making, electronics and so on.
Technology Topic
PrepolymerSolvent +15
Examples
- Experimental program(8)
Example
Example
Example
PUM


Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
Similar technology patents
High-strength heat-resistant casting magnesium alloy material and preparation method thereof
Owner:CHINA WEAPON SCI ACADEMY NINGBO BRANCH
Dipping solution for high-temperature-resistant industrial canvas and preparation method of dipping solution
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
Skincare antibacterial microcapsule finishing agent and preparation method and application thereof
Owner:JIANGSU GOLDSUN TEXTILE SCI & TECH
Polyvinyl chloride pipe material and preparation method thereof
Owner:DENG QUAN PLASTIC TECH HUNAN CO LTD
Fatty polyol dimer and its prepn process and application in foamed polyurethane plastic
Owner:JIANGSU QIANGLIN BIO ENERGY
Classification and recommendation of technical efficacy words
- Good heat resistance
Epoxy resin composition as well as prepreg and laminated board made of same
Owner:GUANGDONG SHENGYI SCI TECH
Heat-resistant polylactic acid composite material and preparation method thereof
Owner:ZHEJIANG HISUN BIOMATERIALS
Flexible vinyl dedicated to wire and cable
Owner:CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF +1