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

A kind of low surface energy moisture curing polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive, low surface energy technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of reducing the NCO content of the finished adhesive, high melt viscosity, initial tack and final tack strength Low problems, to achieve the effect of improving the curing speed, simplifying the reaction process and shortening the reaction time

Active Publication Date: 2020-12-11
MIRACLL CHEM
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many studies on polyester or polyester polyether mixed polyurethane hot melt adhesives, there are problems such as high melt viscosity and poor wettability. Low viscosity, good water resistance, low cost, etc., but low initial and final adhesive strength, poor temperature resistance, and high surface energy, which cannot meet the requirements for non-polar plastics, superhydrophobic fabrics, silicone oil modified fabrics, etc. Bonding of Surface Energy Substrates
In addition, although there are currently researches on the use of siloxane capping to reduce the surface energy of hot melt adhesives, etc., generally silane coupling agents are used to react with prepolymers, not only the siloxane content is low, but it is not enough to improve the surface energy of hot melt adhesives and wettability, and will reduce the NCO content in the finished glue, and increase the reaction time for preparing hot melt adhesive, which will affect the stability of the colloid

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
  • A kind of low surface energy moisture curing polyurethane hot melt adhesive and preparation method thereof
  • A kind of low surface energy moisture curing polyurethane hot melt adhesive and preparation method thereof
  • A kind of low surface energy moisture curing polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method for low surface energy moisture-cured polyurethane hot-melt adhesive, comprising the following steps:

[0033] Step 1: In parts by weight, take the following raw materials: 79.70 parts of silicone polyol with molecular weight of 2000g / mol, 10 parts of silane-terminated polyether with molecular weight of 5000g / mol, 20.25 parts of diphenylmethane diisocyanate, antioxidant 0.5 part of 1010, 0.05 part of stannous octoate and 1 part of white carbon black;

[0034] Step 2: Add silicone polyol and silane-terminated polyether into the reaction kettle, start stirring, and vacuum dehydrate at 120°C and -0.1Mpa for 2 hours to obtain the first mixture;

[0035] Step 3: Take a sample of the first mixture to test that the moisture is less than 100ppm, lower the temperature in the kettle to 75-85°C, add diphenylmethane diisocyanate under the protection of an inert gas, and react at a speed of 400 rpm for 2 hours to obtain the second mixture;

[0036] Step 4: Add...

Embodiment 2

[0038] A kind of preparation of low surface energy moisture curing polyurethane hot-melt adhesive, comprises the following steps:

[0039] Step 1: In parts by weight, take the following raw materials: 84 parts of silicone polyols with a molecular weight of 3000 g / mol, 15 parts of silane-terminated polyether with a molecular weight of 3000 g / mol, 15 parts of diphenylmethane diisocyanate, antioxidant 1.0 parts of 168, 0.03 parts of dibutyltin dilaurate and 1.5 parts of white carbon black;

[0040] Step 2: Add silicone polyol and silane-terminated polyether into the reaction kettle, start stirring, and vacuum dehydrate at 120°C and -0.1Mpa for 2 hours to obtain the first mixture;

[0041] Step 3: Take a sample of the first mixture to test that the moisture is less than 100ppm, lower the temperature in the kettle to 75-85°C, add diphenylmethane diisocyanate under the protection of an inert gas, and react at a speed of 500 rpm for 2 hours to obtain the second mixture;

[0042] St...

Embodiment 3

[0044] A kind of preparation of low surface energy moisture curing polyurethane hot-melt adhesive, comprises the following steps:

[0045] Step 1: In parts by weight, take the following raw materials: 85.7 parts of silicone polyols with a molecular weight of 3300 g / mol, 16 parts of silane-terminated polyurethane with a molecular weight of 8000 g / mol, 14.2 parts of diphenylmethane diisocyanate, and 1010 parts of antioxidant 0.5 part, 0.5 part of antioxidant 168, 0.08 part of stannous octoate and 2 parts of white carbon black;

[0046] Step 2: Add silicone polyol and silane-terminated polyurethane into the reaction kettle, start stirring, and vacuum dehydrate at 120°C and -0.1Mpa for 2 hours to obtain the first mixture;

[0047] Step 3: Take a sample of the first mixture to test that the moisture is less than 100ppm, lower the temperature in the kettle to 75-85°C, add diphenylmethane diisocyanate under the protection of an inert gas, and react at a speed of 450 rpm for 2 hours t...

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
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of polyurethane adhesives, and in particular relates to a low-surface-energy moisture-curing polyurethane hot-melt adhesive and a preparation method thereof. The hot-melt adhesive is mainly prepared by reacting organosilicon polyols and silane-terminated polymers with polyisocyanates , wherein by mass parts, it includes 70-90 parts of silicone polyol, 10-20 parts of silane-terminated polymer, 10-25 parts of isocyanate, and 0.5-2.5 parts of auxiliary agent. The low surface energy moisture-curing polyurethane hot melt adhesive prepared by the present invention has low surface energy and low melt viscosity, excellent wettability, defoaming and temperature resistance, and has high bonding strength, flexibility, impact resistance and Water resistance, excellent overall performance, especially suitable for bonding low surface energy substrates such as non-polar plastics and super-hydrophobic fabrics.

Description

technical field [0001] The invention belongs to the technical field of polyurethane adhesives, and in particular relates to a low-surface-energy moisture-curing polyurethane hot-melt adhesive and a preparation method thereof. Background technique [0002] Moisture-curing polyurethane hot melt adhesive is a kind of polyurethane adhesive. In the 1940s, polyurethane adhesive began to become a member of many adhesives. After the 1980s, it developed rapidly. By adjusting its raw materials and formulas, polyurethane adhesives with different properties can be designed. So far, it has become a type of adhesive with a wide variety and wide application. The earliest types of polyurethane adhesives are mainly two-component reactive and hot-melt adhesives. Most of the two-component adhesives are organic solvent-based, which are easy to pollute the environment when used, and are cumbersome to mix and measure, and are often prone to ratio errors, which will affect the performance of use,...

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): C09J175/08C08G18/76C08G18/61C08G18/50C08G18/62
CPCC08G18/5096C08G18/61C08G18/6295C08G18/7671C09J175/08
Inventor 刘德富王黑龙宋红玮张生王仁鸿
Owner MIRACLL 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