Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of moisture-curing reaction type polyurethane hot melt adhesive for textiles

A technology of polyurethane hot melt adhesive and polyurethane adhesive, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of high surface energy, poor wettability, high melt viscosity, etc., and achieve high Good initial and final tack strength, high and low temperature resistance, and excellent overall performance

Inactive Publication Date: 2021-12-03
广东巨圣新材料科技有限公司
View PDF0 Cites 2 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
  • Preparation method of moisture-curing reaction type polyurethane hot melt adhesive for textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: a kind of preparation method of moisture-curing reactive polyurethane hot-melt adhesive for textiles, comprises the following steps:

[0024] S1. Synthesis of polyurethane prepolymer: Stir polyether polyol or polyester polyol evenly, heat up to 150°C, keep the vacuum degree above 0.09MPa for dehydration, and drop the temperature below 80°C; then, add diisocyanate, Make the reaction system react at 60°C, vacuum defoam to obtain a polyurethane prepolymer; control the mass content of isocyanate groups in the polyurethane prepolymer to 2g / 100g;

[0025] S2. Preparation of polyurethane adhesive: mix polyurethane prepolymer with thermoplastic polyurethane elastomer, stir and heat up to 70°C; dissolve polyurethane in silane coupling agent, and disperse by ultrasonic; add polyurethane dropwise to polyurethane prepolymer , and add a catalyst, react at 80°C for 2 hours, mix and stir to obtain a polyurethane adhesive;

[0026] The catalyst is TiO with a molar ratio ...

Embodiment 2

[0037] Embodiment 2: a kind of preparation method of moisture-curing reactive polyurethane hot-melt adhesive for textiles, comprises the following steps:

[0038] S1. Synthesis of polyurethane prepolymer: Stir polyether polyol or polyester polyol evenly, heat up to 170°C, keep the vacuum degree above 0.09MPa for dehydration, and drop the temperature below 80°C; then, add diisocyanate, Make the reaction system react at 65°C, vacuum defoam to obtain a polyurethane prepolymer; control the mass content of isocyanate groups in the polyurethane prepolymer to 3g / 100g;

[0039] S2. Preparation of polyurethane adhesive: mix polyurethane prepolymer with thermoplastic polyurethane elastomer, stir and heat up to 80°C; dissolve polyurethane in silane coupling agent, and disperse by ultrasonic; add polyurethane dropwise to polyurethane prepolymer , and add a catalyst, react at 85°C for 3 hours, mix and stir to obtain a polyurethane adhesive;

[0040] The catalyst is TiO with a molar ratio ...

Embodiment 3

[0051] Embodiment 3: a kind of preparation method of moisture-curing reactive polyurethane hot-melt adhesive for textiles, comprises the following steps:

[0052] S1. Synthesis of polyurethane prepolymer: Stir polyether polyol or polyester polyol evenly, heat up to 180°C, keep the vacuum degree above 0.09MPa for dehydration, and drop the temperature below 80°C; then, add diisocyanate, Make the reaction system react at 70°C, vacuum defoam to obtain a polyurethane prepolymer; control the mass content of isocyanate groups in the polyurethane prepolymer to 4g / 100g;

[0053] S2. Preparation of polyurethane adhesive: mix polyurethane prepolymer with thermoplastic polyurethane elastomer, stir and heat up to 90°C; dissolve polyurethane in silane coupling agent, and ultrasonically disperse; add polyurethane dropwise to polyurethane prepolymer , and add a catalyst, react at 90°C for 4 hours, mix and stir to obtain a polyurethane adhesive;

[0054] The catalyst is TiO with a molar ratio o...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of a moisture-curing reaction type polyurethane hot melt adhesive for textiles. The method comprises the following steps: S1, synthesis of a polyurethane prepolymer: uniformly stirring polyether polyol or polyester polyol, heating to 150-180 DEG C, dehydrating by keeping the vacuum degree at 0.09 MPa or above, and reducing the temperature to 80 DEG C or below; then adding diisocyanate, enabling a reaction system to react at 60-70 DEG C, and performing vacuum defoaming to obtain a polyurethane prepolymer; and S2, preparation of a polyurethane adhesive: mixing a polyurethane prepolymer with a thermoplastic polyurethane elastomer; dissolving polyurethane in a silane coupling agent, and carrying out ultrasonic dispersion; and dropwise adding polyurethane into the polyurethane prepolymer, adding a catalyst, and mixing and stirring to obtain the polyurethane adhesive. The polyurethane hot melt adhesive disclosed by the invention is high in wettability, low in melt viscosity, high in high and low temperature resistance, relatively high in initial adhesion and final adhesion strength and excellent in comprehensive performance, and can be used for fitting a low-surface-energy base material.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a method for preparing a moisture-curing reactive polyurethane hot-melt adhesive for textiles. Background technique [0002] Polyurethane adhesives have excellent shear strength and impact resistance properties and are suitable for various structural bonding fields. Today, as environmental problems and awareness of environmental protection are increasing, the research and development of environmentally friendly adhesives is increasingly valued. Among them, environmentally friendly polyurethane adhesives are characterized by energy saving, high bonding strength, excellent comprehensive performance, and wide application. The benefits are quickly and widely recognized. [0003] The single-component moisture-curing polyurethane hot melt adhesives reported in recent years are not only mainly composed of polyester prepolymers, but also polyether polyester mixed prepolymers as the ma...

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): C09J175/04C09J175/06
CPCC09J175/04C08L2201/08C08L2207/04C08L75/06
Inventor 郭松华
Owner 广东巨圣新材料科技有限公司
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