Supercharge Your Innovation With Domain-Expert AI Agents!

Single-component solvent-free polyurethane adhesive, preparation method thereof and application

A polyurethane adhesive, solvent-free technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of large cost expenditure, application limitations, cumbersome preparation methods, etc., to achieve good adhesion, Ease of production and simple ingredients for results

Inactive Publication Date: 2017-03-15
SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its numerous components, the preparation method is relatively cumbersome, and the cost of raw materials and preparation is relatively large, and the performance of the obtained product (such as transparency, initial tack, bonding strength, etc.) is not satisfactory.
In particular, the adhesive is used as a sealant, and its application in paper / plastic and paper / aluminum composites is limited

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

preparation example Construction

[0021] The preparation method of the one-component solvent-free polyurethane adhesive of the present invention comprises the following steps:

[0022] 1) Synthesis of polyester polyol: Stir the raw material acid and alcohol under the protection of nitrogen to raise the temperature to the target temperature of 180-250°C, keep it warm until the acid value is ≤30mg KOH / g; then continue to keep warm, turn off the nitrogen, and reduce the vacuum of the system. After the acid value is less than 2mgKOH / g, it can be obtained;

[0023] 2) Preparation of adhesive: mix the polyester polyol and polyether polyol prepared in step 1) evenly, then add isocyanate, control the temperature between 70-100°C until the reaction is complete (generally, by measuring the NCO content twice in a row (generally half an hour apart), if the NCO content value is basically unchanged, then it is judged that the reaction is complete), then add phosphoric acid, stir evenly, and get final product.

[0024] In a...

Embodiment 1

[0044] First synthesize special polyester polyol as follows: adipic acid by mass ratio: terephthalic acid: diethylene glycol: neopentyl glycol=50%: 5%: 30%: 15% mix it, through polycondensation After the reaction, a polyester polyol with an acid value of 0.4 mg KOH / g, a hydroxyl value of 140 mg KOH / g, a water content of 320 ppm and a chroma of 25 was obtained. Then synthesize a one-component solvent-free polyurethane adhesive: mix it according to the mass ratio of polyester polyol: polyether polyol (PPG1000): 4,4'-diphenylmethane diisocyanate = 40%: 30%: 30% , control the temperature at 80°C for 2 hours, lower the temperature to 60°C, add 50ppm phosphoric acid and stir for 0.5 hour, discharge, vacuumize and seal for storage. The obtained adhesive is a colorless transparent viscous liquid.

[0045] Paper / plastic (OPP) compounding: heat the synthesized one-component solvent-free polyurethane adhesive and inject it into the glue tank, set the temperature of the metering roller t...

Embodiment 2

[0047] First synthesize special polyester polyol as follows: adipic acid by mass ratio: isophthalic acid: diethylene glycol: 2-methyl-1,3-propanediol=50%: 5%: 30%: 15% These were mixed and polycondensed to obtain a polyester polyol having an acid value of 0.6 mg KOH / g, a hydroxyl value of 112 mg KOH / g, a moisture content of 280 ppm, and a chroma of 30. Then synthesize one-component solvent-free polyurethane adhesive: by mass ratio polyester polyol: polyether polyol (PPG1000): 2,4-diphenylmethane diisocyanate=35%: 35%: 30% it is mixed, Control the temperature at 80°C for 2 hours, lower the temperature to 60°C, add 80ppm phosphoric acid and stir for 1 hour, discharge, vacuumize and seal for storage. The obtained adhesive is a colorless transparent viscous liquid.

[0048] Paper / aluminum composite: heat the synthesized one-component solvent-free polyurethane adhesive and inject it into the glue tank, set the temperature of the metering roller to 85°C, the temperature of the tran...

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
acid valueaaaaaaaaaa
hydroxyl valueaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of polyurethane adhesives, in particular to a single-component solvent-free polyurethane adhesive, a preparation method thereof and an application. The single-component solvent-free polyurethane adhesive comprises polyurethane prepolymer and phosphoric acid at an isocyanate sealing end. The adhesive has good adhesive strength for paper, plastic films, aluminum foils and the like, the preparation method is simple, pollution is avoided when the adhesive is applied, the adhesive is easy to coat, cost is saved, and the adhesive can be widely used for paper / plastic and paper / aluminum composite film packaging materials.

Description

technical field [0001] The invention relates to the technical field of polyurethane adhesives, in particular to a one-component solvent-free polyurethane adhesive and its preparation method and application. Background technique [0002] At present, most food packaging is mainly made of plastic film packaging with good plasticity, but the texture of plastic film is relatively soft, which cannot protect some fragile foods that are afraid of pressure, and has poor stiffness. Paper / plastic and paper / aluminum composite films have good printability, barrier properties and stiffness, and are widely used in packaging materials to protect the contents well. In addition, it is also widely used in hardcover books, decorative building materials, etc., to make the surface of printed matter smoother and brighter, full of three-dimensional effect, and also play the role of moisture-proof, anti-fouling, anti-counterfeiting, folding resistance, and wear resistance. [0003] In the compoundi...

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 Applications(China)
IPC IPC(8): C09J175/08C09J11/04
CPCC08K3/32C08K2003/329C09J11/04C09J175/08
Inventor 周敏胡洪国赵勇刚
Owner SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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