Moisture-curable polyurethane hot melt adhesive for acoustic elements and preparation method

A polyurethane hot-melt adhesive and acoustic component technology, applied in the field of polyurethane hot-melt adhesive, can solve the problems affecting the performance of acoustic components and high VOC content, achieve high final curing strength, low organic volatile content, and improve the effect of bonding performance

Inactive Publication Date: 2020-03-24
YANTAI DARBOND TECH
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bonding and sealing of acoustic components usually use UV or acrylic adhesives, but this type of adhesive has a high VOC content after curing, which will affect the performance of acoustic components

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
  • Moisture-curable polyurethane hot melt adhesive for acoustic elements and preparation method
  • Moisture-curable polyurethane hot melt adhesive for acoustic elements and preparation method
  • Moisture-curable polyurethane hot melt adhesive for acoustic elements and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Put 25 parts of adipic acid-1,4-butanediol (PBA-2000), 30 parts of polyoxypropylene glycol (PPG-2000), and 20 parts of C5 petroleum resin (Tg is 100°C) into In the reaction kettle, heat to 140°C under a vacuum of 0.1 MPa, stir at a speed of 500 rpm, and vacuum dehydrate for 2 hours;

[0031] 2) Cool down to 95°C, add 20 parts of diphenylmethane diisocyanate (MDI), stir at 800 rpm, raise the temperature to 120°C and keep it warm for 1 hour, then add 1 part of N-phenyl-γ - Aminopropyltrimethoxysilane, 0.05 parts of dimorpholino diethyl ether, heat preservation reaction for 1h under a vacuum of 0.1MPa;

[0032] 3) Add 4 parts of toluenesulfonyl hydrazide isocyanate, keep it warm for 1 hour under a vacuum of 0.1MPa, pour out the product under the protection of nitrogen gas, and seal the package to obtain a moisture-curing polyurethane hot-melt adhesive for acoustic components .

Embodiment 2

[0034] 1) Mix 30 parts of adipic acid-1,4-hexanediol (PHA-3000), 25 parts of polyethylene oxide glycol (PEG-2000), 15 parts of rosin resin (Tg is 80 ° C, acid value 10mgKOH / g) into the reaction kettle, heated to 130°C under a vacuum of 0.1MPa, stirred at a speed of 500 rpm, and vacuum dehydrated for 2 hours;

[0035] 2) Cool down to 95°C, add 25 parts of toluene diisocyanate (TDI), stir at 800 rpm, raise the temperature to 110°C and keep it warm for 1.5 hours, then add 1.5 parts of mercaptopropyltriethoxysilane , 0.08 parts of dimorpholino diethyl ether, insulated and reacted for 1h under a vacuum of 0.1MPa;

[0036] 3) Add 8 parts of triethyl orthoformate, heat-preserve and react for 1.5 hours under a vacuum of 0.1 MPa, pour out the product under the protection of nitrogen gas, and seal the package to obtain a moisture-curing polyurethane hot-melt adhesive for acoustic components.

Embodiment 3

[0038] 1) Mix 15 parts of adipate-1,4-hexanediol (PHA-3500), 15 parts of adipate-1,4-butanediol (PBA-2000), 25 parts of polyoxypropylene diol Alcohol (PPG-2000), 5 parts of C5 petroleum resin (Tg is 90°C), 10 parts of rosin resin (Tg is 90°C, acid value 8mgKOH / g) are put into the reaction kettle, and heated under a vacuum of 0.1MPa to 130°C, stir at a speed of 700 rpm, and vacuum dehydrate for 3 hours;

[0039] 2) Cool down to 100°C, add 5 parts of toluene diisocyanate (TDI) and 20 parts of diphenylmethane diisocyanate (MDI), stir at 900 rpm, heat up to 110°C for 1.5 hours, then Add 1.5 parts of mercaptopropyltriethoxysilane and 0.08 parts of dimorpholino diethyl ether, and keep the reaction for 1h under a vacuum of 0.1MPa;

[0040] 3) Add 5 parts of an oxazolidine compound, keep it under a vacuum of 0.1MPa for 1 hour, pour out the product under the protection of nitrogen gas, and seal the package to obtain a moisture-curing polyurethane hot-melt adhesive for acoustic compone...

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 relates to a moisture-curable polyurethane hot melt adhesive for acoustic elements. The moisture-curable polyurethane hot melt adhesive for acoustic elements comprises the following rawmaterials by mass: 10-55 parts of polyester diol, 20-50 parts of polyether diol, 10-30 parts of isocyanate, 0.1-2 parts of a silane modifier, 0.01-0.1 part of a catalyst, 5-20 parts of tackifying resin and 1-10 parts of a moisture scavenger. The hot melt adhesive obtained by the invention has low viscosity, high initial strength and final curing strength, and excellent high and low temperature resistance, meanwhile, a cured adhesive film has low organic volatile matter content, and the influence on the acoustic performance of acoustic elements is small.

Description

technical field [0001] The invention relates to a polyurethane hot-melt adhesive used for acoustic components, belonging to the technical field of chemical adhesives. Background technique [0002] With the continuous improvement of the quality of human life and the continuous development of the electronics industry, there is room for continuous growth in the domestic electronic adhesive market. Among them, moisture-curing polyurethane hot-melt adhesives (PUR hot-melt adhesives) play an important role, and more subdivided fields have also put forward higher and more refined requirements for the performance of PUR hot-melt adhesives. The demand of the electronic product market will also point out the direction for the development of PUR hot melt adhesive in the electronic industry. [0003] PUR hot melt adhesive is a kind of adhesive mixed with isocyanate functional group-terminated polyurethane prepolymer and various additives. It does not contain water and solvents and has ...

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): C09J175/04C09J175/06C09J175/08C09J11/08C08G18/76C08G18/48C08G18/42C08G18/83
CPCC08G18/4018C08G18/4202C08G18/4238C08G18/4808C08G18/4825C08G18/4833C08G18/7614C08G18/7671C08G18/837C08L2205/03C09J11/08C09J175/04C09J175/06C09J175/08C08L57/02C08L93/04
Inventor 童鹏王建斌陈田安解海华
Owner YANTAI DARBOND TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap