Preparation method of carbon nanotube modified flame-retardant waterborne polyurethane coating and adhesive

A technology of carbon nanotube modification and water-based polyurethane, which is applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesives, etc., and can solve the problems of low dispersion, small thermally conductive filler particles, and the performance of adhesives and other problems, to achieve good pressure sensitivity, improve thermal conductivity, increase mechanical properties and flame retardant properties

Active Publication Date: 2020-05-08
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of thermally conductive fillers is high, because the thermally conductive fillers are very different from the polyurethane matrix in terms of physical form and molecular structure, coupled with their low dispersion, and the thermally conductive fillers themselves have small particles and large specific surface areas, which are easy to agglomerate in applications , causing the performance of the adhesive to be affected

Method used

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  • Preparation method of carbon nanotube modified flame-retardant waterborne polyurethane coating and adhesive
  • Preparation method of carbon nanotube modified flame-retardant waterborne polyurethane coating and adhesive
  • Preparation method of carbon nanotube modified flame-retardant waterborne polyurethane coating and adhesive

Examples

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Effect test

Embodiment 1

[0039] (1) To prepare a modified thermally conductive filler, mix 3-aminopropyltriethoxysilane coupling agent with a mass ratio of 1:2:1:0.5, deionized water, tannic acid, and boron nitride nanoparticles at room temperature The sheets were mixed and hydrolyzed for 30 minutes to obtain the hydrolyzed product A; the obtained hydrolyzed product A was added to a high-speed mixer at 80°C and continued to mix for 30 minutes, cooled and discharged, and vacuum-dried to obtain a modified thermally conductive filler;

[0040] (2) To prepare component A, mix polytetrahydrofuran ether diol and modified thermally conductive filler according to the mass ratio of 4:1, first sonicate for 1 hour and then dehydrate under reduced pressure at 100°C for 1 hour to obtain component A;

[0041] (3) Preparation of carbon nanotube-modified flame-retardant polyurethane coating and adhesive: at 50°C, component A (all, the same below), TDI isocyanate and dibutyltin dilaurate are mixed in according to the m...

Embodiment 2

[0051] (1) To prepare a modified thermally conductive filler, at room temperature, a monoalkoxy titanate coupling agent with a mass ratio of 1:4:2:0.8 (Nanjing Quanxi Chemical Co., Ltd., monoalkoxy fatty acid titanate coupling agent), deionized water, tannic acid, and boron nitride nanosheets were mixed and hydrolyzed for 40 minutes to obtain the hydrolyzed product A; the obtained hydrolyzed product A was added to a high-speed mixer at 90° C. to continue mixing for 40 min, cooled and discharged, Vacuum drying to obtain a modified thermally conductive filler;

[0052] (2) To prepare component A, mix polycarbonate diol and modified thermally conductive filler according to the mass ratio of 5:1, ultrasonicate for 2.5 hours and then dehydrate under reduced pressure at 110°C for 2 hours to obtain component A;

[0053] (3) Preparation of coatings and adhesives: React component A, MDI isocyanate and dibutyltin dilaurate at a mass ratio of 3.0:1:0.02 at 80r / min for 50 minutes at 60°C,...

Embodiment 3

[0063](1) To prepare a modified thermally conductive filler, mix 3-aminopropyltriethoxysilane coupling agent with a mass ratio of 1:3:1.5:0.65, deionized water, tannic acid, and boron nitride nanoparticles at room temperature The sheets were mixed and hydrolyzed for 35 minutes to obtain the hydrolyzed product A; the obtained hydrolyzed product A was added to a high-speed mixer at 85°C and continued to mix for 35 minutes, cooled and discharged, and vacuum-dried to obtain a modified thermally conductive filler;

[0064] (2) To prepare component A, mix polytetrahydrofuran ether diol and modified thermally conductive filler according to the mass ratio of 4.5:1, first ultrasonically for 1.5h, and then dehydrate under reduced pressure at 105°C for 1.5h to obtain component A;

[0065] (3) Preparation of carbon nanotube-modified flame-retardant polyurethane coating and adhesive: react component A, PAPI isocyanate and dibutyltin dilaurate at a speed of 70r / min at a mass ratio of 2.75:1:...

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Abstract

The invention relates to a preparation method of a carbon nanotube modified flame-retardant waterborne polyurethane coating and adhesive. The preparation method comprises the following steps: firstly,preparing a modified heat-conducting filler by utilizing a coupling agent, deionized water, tannic acid and a boron nitride nanosheet layer; then preparing a component A by utilizing polymer polyol and the modified heat-conducting filler; finally, adding a modifier, a polyol chain extender, a cross-linking agent and a filler polymerization chain to the component A, isocyanate and dibutyltin dilaurate to prepare polyurethane A, and adding a tackifier to the polyurethane A to prepare the carbon nanotube modified flame-retardant polyurethane coating and adhesive. The obtained polyurethane coating and adhesive have the outstanding advantages that the combustion smoke performance is better reduced, and the pressure-sensitive performance is improved.

Description

technical field [0001] The invention relates to the field of functional polymer materials, in particular to a preparation method of carbon nanotube modified flame-retardant polyurethane coating and adhesive. Background technique [0002] With the development of automobiles, electronic appliances, wind power generation devices, aviation and other fields and the continuous improvement of performance requirements, adhesives, as an important auxiliary material necessary for this field, are more and more widely used. Ordinary pressure-sensitive tape and label technology is very mature, and its output exceeds demand; however, pressure-sensitive tape and labels used in the automotive and electronics industries require good cohesion to ensure that they are subject to peeling force or shearing force after bonding. There will be no damage to the adhesive layer, and the adherend can be easily repaired or rebonded. [0003] Pressure-sensitive adhesive refers to an adhesive that only ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D175/06C09D129/04C09D5/18C09D7/61C09D7/62C09D7/63C09D7/65C09J175/08C09J175/06C09J129/04C09J11/04C09J11/06C09J11/08C09J7/38C09J7/25C08J3/24
CPCC09D175/08C09D175/06C09D5/18C09D7/61C09D7/62C09D7/63C09D7/65C09J175/08C09J175/06C09J11/04C09J11/06C09J11/08C09J7/38C09J7/255C08K2003/385C08L2201/02C08K2201/011C08K2201/003C08K2201/004C08J2375/08C08J2375/06C08J2429/04C08K2003/0806C09J2467/006C09J2475/00C08J3/24C09J2301/122C09J2301/302C08L29/04C08K13/06C08K9/06C08K9/02C08K3/38C08K3/041C08K3/34C08K3/08C08K9/04Y02P20/10
Inventor 段宝荣王全杰王辉强唐志海王琦研王雪刁屾仇同济
Owner YANTAI UNIV
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