CN105086643A - Antistatic led heat-dissipation coating and preparation method thereof - Google Patents

Abstract

The invention discloses an antistatic led heat-dissipation coating. The coating comprises, by weight, 360-400 parts of high-density polyethylene, 100-130 parts of sodium hydroxide, 400-420 parts of bisphenol A, 160-180 parts of epoxy chloropropane, 10-12 parts of silicon nitride, 2-3 parts of acrylamide, 1-1.6 parts of ammonium chloride, 0.05-0.1 part of N,N-methylene-bisacrylamide, 3-4 parts of ammonium persulfate, 0.01-0.02 part of TritonX114, 1.8-2 parts of ammonium hydroxide, 10-20 parts of diethylenetriamine, 30-42 parts of carbon nano-tubes, 4-7 parts of polyethylene glycol fatty acid ester, 1-2 parts of dodecyldimethyl betaine, 2-3 parts of alkyl phosphate diethanolamine salt, 6-10 parts of calcium powder, 5-8 parts of polyisobutylene and 2-3 parts of ammonium octamolybdate. The alkyl phosphate diethanolamine salt and dodecyldimethyl betaine are adopted as antistatic agents, good compatibility between the antistatic agents and all the other raw materials is achieved, the antistatic performance of the surface of the coating can be effectively improved, and safety can be improved.

Description

A kind of antistatic led heat radiation coating and preparation method thereof

Technical field

The present invention relates to heat radiation coating technical field, particularly relate to a kind of antistatic led heat radiation coating and preparation method thereof.

Background technology

Epoxy resin is one of very important thermoset macromolecule material, has cohesive strength high, and electrical insulation capability is good, the advantages such as shrinking percentage is low, good processability, is widely used in each fields such as electronics, machinery, building;

CNT (carbon nano-tube) has higher thermal conductivity, therefore CNT (carbon nano-tube) is filled in epoxy resin as packing material and has good application prospect as a kind of heat sink material, but due to the nano effect of CNT (carbon nano-tube), CNT (carbon nano-tube) is more difficult dispersion in the epoxy.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of antistatic led heat radiation coating and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of antistatic led heat radiation coating, it is made up of the raw material of following weight parts:

High density polyethylene(HDPE) 360-400, sodium hydroxide 100-130, dihydroxyphenyl propane 400-420, epoxy chloropropane 160-180, silicon nitride 10-12, acrylamide 2-3, ammonium chloride 1-1.6, N,N methylene bis acrylamide 0.05-0.1, ammonium persulphate 3-4, TritonX1140.01-0.02, ammoniacal liquor 1.8-2, diethylenetriamine 10-20, CNT (carbon nano-tube) 30-42, cithrol 4-7, Varion CDG-K 1-2, alkyl phosphate diethanolamine salt 2-3, sierozem power 6-10, polyisobutene 5-8, ammonium octamolybdate 2-3.

A preparation method for described antistatic led heat radiation coating, comprises the following steps:

(1) above-mentioned sodium hydroxide is added water, be mixed with the sodium hydroxide solution of 10-15%;

(2) by CNT (carbon nano-tube), silicon nitride, ammonium chloride mixing, ball milling is even;

(3) by alkyl phosphate diethanolamine salt, Varion CDG-K mixing, join in 7-10 times of deionized water, stir, add ammonium octamolybdate, stir, obtain antistatic emulsion;

(4) joined by cithrol in 3-5 times of Virahol, stirring and dissolving, adds polyisobutene, and raised temperature is 60-70 DEG C, and add sierozem power, above-mentioned antistatic emulsion, insulated and stirred 1-2 hour, is cooled to normal temperature, obtains static inhibitor;

(5) by aforesaid propylene acid amides, N,N methylene bis acrylamide, TritonX114 mixing, join in 40-50 times of water, stir, add above-mentioned ball milling material, 1400-1500 rev/min of dispersed with stirring 1-2 minute, add ammonium persulphate, ammoniacal liquor, leave standstill 3-4 hour, obtain frothy gel;

(6) in the sodium hydroxide solution of above-mentioned 10-15%, dihydroxyphenyl propane is added, raised temperature is 60-65 DEG C, add frothy gel, ultrasonic stirring process 30-40 minute, adds epoxy chloropropane, raised temperature is 80-85 DEG C, insulated and stirred 3-4 hour, adds static inhibitor, continues insulated and stirred 30-40 minute, cooling after washing, to neutral, is dried;

(7) material after above-mentioned oven dry is mixed with diethylenetriamine, stir 3-5 minute, add each raw material of residue, stir, be sent in twin screw extruder and melt extrude, pulverize and sieve after cooling, obtain described heat radiation coating.

Advantage of the present invention is:

(1) powder coating of the present invention has good resistance to impact shock:

Carbon nanotube has larger surfactivity, with macromolecular chain generation physics or chemically combined chance many, increase with substrate contact area, carbon nanotube forms the reactive force much larger than Van der Waals force with epoxide group on interface, form desirable interface, be conducive to the Stress transmit between CNT (carbon nano-tube) and epoxy resin, improve the ability bearing load, when matrix material is subject to foreign impacts power, epoxy resin can pass to carbon nanotube and silicon nitride surging force, make carbon nanotube, silicon nitride absorbs more energy, thus matrix material can be made to bear higher impact force,

(2) powder coating of the present invention has very high sticking power:

The string stress making to produce in curing of coating process that adds of carbon nanotube, silicon nitride reduces, thus the sticking power of film is improved;

(3) powder coating of the present invention has good salt spray resistance:

Carbon nanotube, silicon nitride have good dispersiveness in the epoxy, and the carbon nanotube of these good distribution, silicon nitride can play the effect of extra physical crosslinking point, and the compactness of the powder coating film obtained is improved, and salt spray resistance also increases thereupon;

(4) powder coating of the present invention has good thermal diffusivity:

Silicon nitride has very low specific inductivity, good chemical stability and heat-shock resistance, inherently there is good heat conductivility, and the material after curing molding formed a kind of with the network structure of polyacrylamide be skeleton, foam and particle stabilized to exist wherein, there is some strength and flexible porous body, stable heat dissipation channel is formed between these stable hole CNT (carbon nano-tube), be conducive to distributing of heat, greatly improve thermal conductivity.

The present invention adopts alkyl phosphate diethanolamine salt, Varion CDG-K etc. as static inhibitor, and has good consistency between each raw material, effectively can improve the antistatic property of film coated surface, improves security.

Embodiment

A kind of antistatic led heat radiation coating, it is made up of the raw material of following weight parts:

High density polyethylene(HDPE) 360, sodium hydroxide 100, dihydroxyphenyl propane 400, epoxy chloropropane 160, silicon nitride 10, acrylamide 2, ammonium chloride 1, N, N methylene-bisacrylamide 0.05, ammonium persulphate 3, TritonX1140.01, ammoniacal liquor 1.8, diethylenetriamine 10, CNT (carbon nano-tube) 30, cithrol 4, Varion CDG-K 1, alkyl phosphate diethanolamine salt 2, sierozem power 6, polyisobutene 5, ammonium octamolybdate 2.

A preparation method for described antistatic led heat radiation coating, comprises the following steps:

(1) above-mentioned sodium hydroxide is added water, be mixed with the sodium hydroxide solution of 10%;

(2) by CNT (carbon nano-tube), silicon nitride, ammonium chloride mixing, ball milling is even;

(3) by alkyl phosphate diethanolamine salt, Varion CDG-K mixing, join in 7 times of deionized waters, stir, add ammonium octamolybdate, stir, obtain antistatic emulsion;

(4) joined by cithrol in 3 times of Virahols, stirring and dissolving, adds polyisobutene, and raised temperature is 60 DEG C, and add sierozem power, above-mentioned antistatic emulsion, insulated and stirred 1 hour, is cooled to normal temperature, obtains static inhibitor;

(5) by aforesaid propylene acid amides, N, N methylene-bisacrylamide, TritonX114 mixing, join in 40 times of water, stir, add above-mentioned ball milling material, 1400 revs/min of dispersed with stirring 1 minute, add ammonium persulphate, ammoniacal liquor, leave standstill 3 hours, obtain frothy gel;

(6) in the sodium hydroxide solution of above-mentioned 10%, dihydroxyphenyl propane is added, raised temperature is 60 DEG C, add frothy gel, ultrasonic stirring process 30 minutes, adds epoxy chloropropane, raised temperature is 80 DEG C, insulated and stirred 3 hours, adds static inhibitor, continues insulated and stirred 30 minutes, cooling after washing, to neutral, is dried;

(7) material after above-mentioned oven dry is mixed with diethylenetriamine, stir 3 minutes, add each raw material of residue, stir, be sent in twin screw extruder and melt extrude, pulverize and sieve after cooling, obtain described heat radiation coating.

Performance test:

Impact resistance is 29kgcm;

Sticking power and resistance to Neutral Salt Spray Corrosion grade are 2 grades;

Thermal conductivity is 0.523W/mK.

Claims (2)

1. an antistatic led heat radiation coating, is characterized in that what it was made up of the raw material of following weight parts:

High density polyethylene(HDPE) 360-400, sodium hydroxide 100-130, dihydroxyphenyl propane 400-420, epoxy chloropropane 160-180, silicon nitride 10-12, acrylamide 2-3, ammonium chloride 1-1.6, N,N methylene bis acrylamide 0.05-0.1, ammonium persulphate 3-4, TritonX1140.01-0.02, ammoniacal liquor 1.8-2, diethylenetriamine 10-20, CNT (carbon nano-tube) 30-42, cithrol 4-7, Varion CDG-K 1-2, alkyl phosphate diethanolamine salt 2-3, sierozem power 6-10, polyisobutene 5-8, ammonium octamolybdate 2-3.

2. a preparation method for antistatic led heat radiation coating as claimed in claim 1, is characterized in that comprising the following steps:

(1) above-mentioned sodium hydroxide is added water, be mixed with the sodium hydroxide solution of 10-15%;

(2) by CNT (carbon nano-tube), silicon nitride, ammonium chloride mixing, ball milling is even;

(3) by alkyl phosphate diethanolamine salt, Varion CDG-K mixing, join in 7-10 times of deionized water, stir, add ammonium octamolybdate, stir, obtain antistatic emulsion;

(4) joined by cithrol in 3-5 times of Virahol, stirring and dissolving, adds polyisobutene, and raised temperature is 60-70 DEG C, and add sierozem power, above-mentioned antistatic emulsion, insulated and stirred 1-2 hour, is cooled to normal temperature, obtains static inhibitor;

(5) by aforesaid propylene acid amides, N,N methylene bis acrylamide, TritonX114 mixing, join in 40-50 times of water, stir, add above-mentioned ball milling material, 1400-1500 rev/min of dispersed with stirring 1-2 minute, add ammonium persulphate, ammoniacal liquor, leave standstill 3-4 hour, obtain frothy gel;

(6) in the sodium hydroxide solution of above-mentioned 10-15%, dihydroxyphenyl propane is added, raised temperature is 60-65 DEG C, add frothy gel, ultrasonic stirring process 30-40 minute, adds epoxy chloropropane, raised temperature is 80-85 DEG C, insulated and stirred 3-4 hour, adds static inhibitor, continues insulated and stirred 30-40 minute, cooling after washing, to neutral, is dried;

(7) material after above-mentioned oven dry is mixed with diethylenetriamine, stir 3-5 minute, add each raw material of residue, stir, be sent in twin screw extruder and melt extrude, pulverize and sieve after cooling, obtain described heat radiation coating.