Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for closed-type aliphatic-series isocyanate water dispersoid

An isocyanate and aliphatic technology, applied in the field of preparation of closed aliphatic isocyanate water dispersion, can solve problems such as low bonding or bonding strength, and achieve the effect of simplifying the use process and stabilizing the system

Inactive Publication Date: 2012-04-18
NORTHEAST FORESTRY UNIVERSITY
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem that the existing blocked aliphatic isocyanate has low bonding or bonding strength; and provides a method for preparing an aqueous dispersion of blocked aliphatic isocyanate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for closed-type aliphatic-series isocyanate water dispersoid
  • Preparation method for closed-type aliphatic-series isocyanate water dispersoid
  • Preparation method for closed-type aliphatic-series isocyanate water dispersoid

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method of blocked aliphatic isocyanate water dispersion in the present embodiment is carried out according to the following steps:

[0025] Step 1, drying the polyol at 60-100°C;

[0026] Step 2, add 0.5~1.5mol polyhydric alcohol, 0.2~0.8molDMPA (dimethylol propionic acid) into 10~250mL composite solvent, described composite solvent is by solvent A and solvent B according to the ratio of 1: (3~10) The volume ratio is mixed at room temperature, the solvent A is acetone, the solvent B is ethyl acetate or dichloromethane, stirred for 10-60 minutes, and then nitrogen gas is passed through at a flow rate of 3-15mL / min for 15-45 minutes (the purpose is to remove the solution Oxygen in), then heated to 50-95°C and kept warm for 15-45 minutes;

[0027] Step 3, then dropwise add 0.5-2mol aliphatic isocyanate, the dropping rate is controlled at 2-5s / drop, and then react at 50-95°C for 0.5-7 hours;

[0028] Step 4, then add a blocking age...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment is different from Embodiment 1 in that: the polyol described in step 1 is polyester polyol or polyether polyol. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the polyhydric alcohol described in step one is polyoxypropylene glycol, polyethylene oxide glycol, polyethylene glycol, polyethylene adipate two alcohol, polycaprolactone or poly-2,3-dimethyl-2,3-butanediol. Other steps and parameters are the same as in the first embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
The average diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for closed-type aliphatic-series isocyanate water dispersoid, which aims to solve the technical problems of low cementing or splicing strength existing in the traditional closed-type aliphatic-series isocyanate. The preparation method for the closed-type aliphatic-series isocyanate water dispersoid comprises the following steps: 1. drying polyatomic alcohol; 2. adding the polyatomic alcohol and dimethylolpropionic acid into compound solvent, stirring, introducing nitrogen, and keeping warm for 15-45 minutes after heating; 3. dripping aliphatic-series isocyanate; 4. adding blocking agent; 5. adding triethylamine, then adding deionized water, emulsifying, and stopping introducing the nitrogen; and 6. removing the compound solvent. The closed-typehexamethylene diisocyanate (HDI) water dispersoid prepared with the preparation method can be used for high-grade cementing and finishing fields, such as wood lacquers, leather finishing agent, aqueous adhesive and the like, also can serve as the crosslinking curing agent and the accessory ingredient for film forming resin and is applied to the fields, such as enamelled wires, paper treating agent and the like.

Description

technical field [0001] The invention relates to a preparation method of a blocked aliphatic isocyanate aqueous dispersion. Background technique [0002] Isocyanate compounds and their polymers have a wide application space due to their strong adhesion, good gloss, good corrosion resistance and wear resistance, and can be made into various materials or additives with excellent performance. Especially used as adhesives and coatings, it has become an important bonding and coating agent because of its excellent bonding performance, no formaldehyde release, excellent low temperature resistance and aging resistance, and strong adaptability to the materials to be bonded. . [0003] However, the isocyanate group is chemically active, easily reacts with water and substances containing active hydrogen, and is very sensitive to moisture. As a result, the prepared isocyanate adhesive is easy to react with water vapor and makes storage difficult, especially in aqueous solutions. The st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08J3/03C08L75/04C08G18/66C08G18/80C08G18/42C08G18/48C08G18/34C09D175/04C09J175/04
Inventor 李志国张永良顾继友张彦华
Owner NORTHEAST FORESTRY UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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