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

A kind of low-viscosity one-component solvent-free polyurethane adhesive and its preparation method and application

A solvent-free polyurethane and adhesive technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of large equipment investment, inconvenient use, high viscosity, etc., and achieve low viscosity, no VOC emissions, The effect of simple ingredients

Active Publication Date: 2021-06-22
J&H XIANGYANG CHEM
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity of the existing one-component solvent-free polyurethane adhesive is too high, it is inconvenient to use, the disadvantages of large equipment investment and high energy consumption limit its application, and now paper / plastic and paper / aluminum composite films are used in packaging materials and decorative building materials. Therefore, it is necessary to further explore low-viscosity, high-bond strength one-component solvent-free polyurethane adhesives, and other applications in paper / plastic, paper / metal foil composites

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The preparation steps of the low-viscosity one-component solvent-free polyurethane adhesive of embodiment 1 are as follows:

[0059] a. Preparation of isocyanate-terminated polyurethane prepolymer

[0060] Add 210g of IPDI to the reaction bottle, start stirring, add 40g of dehydrated hydroxypropyl acrylate (HPA), react at 55-60°C for 1 hour, and react at 75-80°C for 1.5 hours, then add 230g of dehydrated polyether ternary Alcohol (molecular weight: 1500), react for 1 hour without heating, then raise the temperature to 70-74°C for 1 hour, react for 1 hour at 80-84°C, add 2g of stannous octoate, and continue to react at 86-90°C for 3.5 hours , and then measure the NCO percentage content in the reactant every 1 hour, and stop the reaction when the NCO content decreases and tends to be stable, so as to obtain an isocyanate-terminated polyurethane prepolymer.

[0061] b. Preparation of low-viscosity one-component solvent-free polyurethane adhesive

[0062] Cool the materia...

Embodiment 2

[0065] The preparation steps of the low-viscosity one-component solvent-free polyurethane adhesive of embodiment 2 are as follows:

[0066] a. Preparation of isocyanate-terminated polyurethane prepolymer

[0067] Add 195g of MDI into the reaction bottle, start stirring, add 600g of dehydrated polyether diol (molecular weight: 2000), react at room temperature for 1 hour, then raise the temperature to 60°C for 1 hour, and continue to heat up to 74-78°C for reaction After 2.5 hours, measure the NCO percentage content in the reactant every 0.5 hours, and stop the reaction when the NCO content decreases and tends to be stable, to obtain an isocyanate-terminated polyurethane prepolymer.

[0068] b. Preparation of low-viscosity one-component solvent-free polyurethane adhesive

[0069] Cool the material in step a to 60°C, add 279g of PAPI, stir evenly, then add 0.2g of phosphoric acid, stir for 20 minutes, and then discharge to obtain the low-viscosity one-component solvent-free poly...

Embodiment 3

[0072] The preparation steps of the low-viscosity one-component solvent-free polyurethane adhesive of embodiment 3 are as follows:

[0073] a. Preparation of isocyanate-terminated polyurethane prepolymer

[0074] Add 140g of HMDI into the reaction bottle, start stirring, add 20g of dehydrated hydroxypropyl acrylate (HPA), react at 55-60°C for 1 hour, and react at 75-80°C for 2.5 hours, then add 160g of dehydrated polyether ternary Alcohol (molecular weight: 3000) and 200g polyether diol (molecular weight: 2000), react for 1 hour without heating, then raise the temperature to 70°C for 1 hour, add 2g of dibutyl Tin dilaurate, continue to react at 95-100°C for 3.5 hours, then measure the NCO percentage content in the reactant every 1 hour, stop the reaction when the NCO content decreases and tends to be stable, and obtain an isocyanate-terminated polyurethane prepolymer .

[0075] b. Preparation of low-viscosity one-component solvent-free polyurethane adhesive

[0076] Cool th...

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low-viscosity one-component solvent-free polyurethane adhesive, a preparation method and application thereof. This low-viscosity, one-component, solvent-free polyurethane adhesive consists of isocyanate-terminated polyurethane prepolymers, polyisocyanates and additives. The invention also discloses the preparation method of the low-viscosity one-component solvent-free polyurethane adhesive, and also discloses the application of the polyurethane adhesive in paper / plastic and paper / metal foil compounding. The low-viscosity one-component solvent-free polyurethane adhesive product of the present invention has a low viscosity, and is suitable for direct coating by a coating machine at room temperature, which simplifies the coating equipment, and reduces the production capacity because there is no need to heat the glue and the coating roller. Energy consumption simplifies the composite process of paper / plastic and paper / metal foil, and the composite product also has high bonding strength.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a low-viscosity single-component solvent-free polyurethane adhesive and a preparation method and application thereof. Background technique [0002] At present, the viscosity of the one-component solvent-free polyurethane adhesive sold on the market is relatively high, and the viscosity at room temperature is generally about 10000mPa·s. Before use, use the heating head to heat the adhesive to 80-100°C to reduce the viscosity to about 1000mPa·s. At the same time, it is necessary to heat the top roller and transfer roller to 80-100°C to keep the glue in good condition. Coating can only be carried out in a flowing state, and another purpose of reducing the viscosity of the glue is to maintain good wetting of the coated object and achieve good adhesion. This kind of one-component solvent-free polyurethane adhesive is not only troublesome in construction, but also high i...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J175/06C08G18/80C08G18/76C08G18/73C08G18/48C08G18/42C08G18/10C08G18/12
CPCC08G18/10C08G18/12C08G18/4018C08G18/425C08G18/4812C08G18/4825C08G18/4829C08G18/73C08G18/7664C08G18/7671C08G18/8064C09J175/06C09J175/08
Inventor 周建明何绍群刘晓鸿
Owner J&H XIANGYANG CHEM
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