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Preparation method for carbon nanotube modified light-resistant 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 complex modification processes, complex preparation of acrylic resins, and high production costs. problems, to achieve the effect of increasing mechanical properties, maintaining mechanical properties, and improving thermal conductivity

Inactive Publication Date: 2020-04-21
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using single factor analysis, the effects of R value, DMPA dosage, HEA / NCO and MMA dosage on the surface morphology and anti-glare performance of the film were discussed. The process is complicated, and MDI, which is the most prone to yellowing among isocyanates, has not been studied by this method. In addition, the preparation of acrylic resin is complicated, which also leads to relatively high production costs, so this technology needs to be optimized

Method used

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  • Preparation method for carbon nanotube modified light-resistant waterborne polyurethane coating and adhesive
  • Preparation method for carbon nanotube modified light-resistant waterborne polyurethane coating and adhesive
  • Preparation method for carbon nanotube modified light-resistant waterborne polyurethane coating and adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) To prepare a modified thermally conductive filler, mix 3-aminopropyltriethoxysilane, deionized water, tannic acid, and boron nitride nanosheets with a mass ratio of 1:2:1:1 at room temperature and hydrolyzed for 30 minutes to obtain hydrolyzate A; add the obtained hydrolyzate A to a high-speed mixer at 80°C and continue mixing for 30 minutes, cool and discharge, and vacuum-dry to obtain a modified thermally conductive filler;

[0033] (2) Preparation of component A: Sonicate polytetrahydrofuran ether glycol and modified thermally conductive filler at a mass ratio of 2:1 for 1 hour, and then dehydrate under reduced pressure at 100°C for 1 hour to prepare component A;

[0034] (3) Preparation of carbon nanotube-modified light-resistant water-based polyurethane coating and adhesive: at 50°C, component A, MDI-type isocyanate, and dibutyltin dilaurate are mixed at a speed of 60r / min according to the mass ratio of 2.5:1:0.02 React at 80°C for 60 minutes, then raise the te...

Embodiment 2

[0044] (1) Preparation of modified thermally conductive filler: Monoalkoxy titanate coupling agent with a mass ratio of 1:5:3:1.3 at room temperature (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;

[0045] (2) Preparation of component A: Sonicate polycarbonate diol and modified thermally conductive filler at a mass ratio of 3:1 for 2.5 hours, and then dehydrate under reduced pressure at 110°C for 2 hours to prepare component A;

[0046] (3) Preparation of carbon nanotube-modified light-resistant water-based polyurethane coating and adhesive: Mix component A, MDI isocyanate, and dibutyltin dilaurate at a mass ratio of...

Embodiment 3

[0056] (1) Preparation of modified thermally conductive filler: Mix 3-aminopropyltriethoxysilane, deionized water, tannic acid, and boron nitride nanosheets with a mass ratio of 1:3.5:2:1.15 at room temperature and hydrolyzed for 35 minutes to obtain the hydrolyzed product A; add the obtained hydrolyzed product A to a high-speed mixer at 85°C and continue mixing for 35 minutes, cool and discharge, and vacuum-dry to obtain a modified thermally conductive filler;

[0057] (1) Preparation of component A: Sonicate polytetrahydrofuran ether diol and modified thermally conductive filler at a mass ratio of 2.5:1 for 1.5 hours, and then dehydrate under reduced pressure at 105°C for 1.5 hours to prepare component A;

[0058] (3) Preparation of carbon nanotube-modified light-resistant water-based polyurethane coatings and adhesives: at 60°C, component A, MDI type isocyanate, and dibutyltin dilaurate are mixed at a speed of 70r / min at a mass ratio of 2.75:1:0.02 React for 75 minutes, the...

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Abstract

The invention relates to a preparation method for a carbon nanotube modified light-resistant waterborne polyurethane coating and adhesive. The preparation method comprises the following steps: subjecting a component A, isocyanate and dibutyltin dilaurate to a reaction according to a mass ratio of (2.5-3.0): 1: 0.02 at 50-70 DEG C and a rotating speed of 60-80 r / min for 60-90 min, then carrying outheating to 75-85 DEG C, continuing the reaction for 1-3 hours, adding 0.1-0.4 time of a modifier, 0.25-0.34 time of a polyol chain extender, 0.02-0.05 time of a filler polymer chain and 1.2 times ofwater, continuing the reaction for 1-2 h at 80-90 DEG C, then adding 0.01 time of methyl methacrylate, 0.005 time of ammonium persulfate and 0.1 time of water, carrying out a reaction at 70-80 DEG C for 1-2 h, adding 0.01 time of glyoxime and 0.005 time of 3,4,5-trimethoxybenzoic acid, and carrying out a reaction at 70-80 DEG C for 1-2 h so as to obtain the carbon nanotube modified light-resistantaqueous polyurethane coating and an adhesive. The obtained polyurethane is superior to the prior art in the aspects of light resistance, flame retardance and smoothness.

Description

technical field [0001] The invention relates to the field of functional polymer materials, in particular to a method for preparing carbon nanotube-modified light-resistant water-based polyurethane coatings and adhesives. Background technique [0002] MDI-type polyurethane (MDI-PU) is a widely used polymer material, which has a large number of applications in the fields of foam, elastomer, fiber, adhesive and coating. Compared with other types of PU, its performance is better, its price is relatively low, and MDI has low toxicity, and its harm to human body and environment is low in the process of preparing PU. However, the existence of benzene rings in the molecular structure makes MDI-PU prone to aging and degradation under the action of ultraviolet (UV) in sunlight, the physical and mechanical properties of the material are reduced, and yellowing occurs on the surface, which greatly affects the outdoor field. Applications. In addition, MDI is my country's dominant field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D133/12C09D7/62C09D7/63C09D7/65C09J175/08C09J11/04C09J11/06C09J11/08C09J175/04C09D175/04
CPCC08K2003/0806C08K2003/385C08K2201/011C08L2201/02C08L2201/08C09D175/04C09D175/08C09J11/04C09J11/06C09J11/08C09J175/04C09J175/08C09D7/62C09D7/63C09D7/65C08L33/12C08L29/04C08K13/06C08K9/02C08K3/041C08K9/04C08K3/34C08K3/08C08K7/00C08K3/38C08K5/1545
Inventor 段宝荣王全杰王辉强王琦研刁屾王雪
Owner YANTAI UNIV
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