CN105131734A - Flame-retardant led radiating coating and preparation method therefor - Google Patents

Abstract

The invention discloses a flame-retardant led radiating coating which is prepared from the following raw materials in parts 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 TtrixonX114, 1.8-2 parts of ammonia water, 10-20 parts of diethylenetriamine, 30-42 parts of nano carbon tubes, 4-7 parts of triglycol dioctate, 3-4 parts of monopotassium phosphate, 1-2 parts of deca-brominated diphenyl ether, 10-16 parts of talcum powder, 3-4 parts of an alkyl ketene dimer, 0.1-0.2 part of sp80 and 1.7-2 parts of maleic anhydride. By adopting monopotassium phosphate, deca-brominated diphenyl ether and talcum powder as filler, the coating is non-toxic and pollution-free, the flame-retardant property of the coating can be effectively improved, and the safety is improved.

Description

A kind of fire-retardant 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 fire-retardant 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 fire-retardant led heat radiation coating and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of fire-retardant 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, triglycol two 2-ethylhexoate 4-7, potassium primary phosphate 3-4, decabromodiphenyl oxide 1-2, talcum powder 10-16, alkyl ketene dimer 3-4, sp800.1-0.2, maleic anhydride 1.7-2.

A preparation method for described fire-retardant 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) joined in 26-30 times of deionized water by above-mentioned potassium primary phosphate, stir, add maleic anhydride, raised temperature is 70-80 DEG C, insulated and stirred 3-5 minute, obtains anhydride solution;

(4) by alkyl ketene dimer heat fused, add triglycol two 2-ethylhexoate, stir, add above-mentioned anhydride solution, talcum powder, sp80,600-1000 rev/min stirring 4-10 minute, dewatered drying, obtains fire-retardant powder;

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

(6) in the sodium hydroxide solution of above-mentioned 10-15%, add dihydroxyphenyl propane, raised temperature is 60-65 DEG C, adds frothy gel, ultrasonic stirring process 30-40 minute, adds epoxy chloropropane, and raised temperature is 80-85 DEG C, insulated and stirred 3-4 hour, 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 potassium primary phosphate, decabromodiphenyl oxide, talcum powder blended as filler, nontoxic pollution-free, effectively can improve the flame retardant properties of film, improves security.

Embodiment

A kind of fire-retardant 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, triglycol two 2-ethylhexoate 4, potassium primary phosphate 3, decabromodiphenyl oxide 1, talcum powder 10, alkyl ketene dimer 3, sp800.1, maleic anhydride 1.7.

A preparation method for described fire-retardant 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) joined in 26 times of deionized waters by above-mentioned potassium primary phosphate, stir, add maleic anhydride, raised temperature is 70 DEG C, and insulated and stirred 3 minutes, obtains anhydride solution;

(4) by alkyl ketene dimer heat fused, add triglycol two 2-ethylhexoate, stir, add above-mentioned anhydride solution, talcum powder, sp80,600 revs/min are stirred 4 minutes, and dewatered drying, obtains fire-retardant powder;

(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, fire-retardant powder, 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%, add dihydroxyphenyl propane, raised temperature is 60 DEG C, adds frothy gel, and ultrasonic stirring process 30 minutes, adds epoxy chloropropane, and raised temperature is 80 DEG C, insulated and stirred 3 hours, and 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 30kgcm;

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

Thermal conductivity is 0.516W/mK.

Claims (2)

1. a fire-retardant 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, triglycol two 2-ethylhexoate 4-7, potassium primary phosphate 3-4, decabromodiphenyl oxide 1-2, talcum powder 10-16, alkyl ketene dimer 3-4, sp800.1-0.2, maleic anhydride 1.7-2.

2. a preparation method for fire-retardant 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) joined in 26-30 times of deionized water by above-mentioned potassium primary phosphate, stir, add maleic anhydride, raised temperature is 70-80 DEG C, insulated and stirred 3-5 minute, obtains anhydride solution;

(4) by alkyl ketene dimer heat fused, add triglycol two 2-ethylhexoate, stir, add above-mentioned anhydride solution, talcum powder, sp80,600-1000 rev/min stirring 4-10 minute, dewatered drying, obtains fire-retardant powder;

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

(6) in the sodium hydroxide solution of above-mentioned 10-15%, add dihydroxyphenyl propane, raised temperature is 60-65 DEG C, adds frothy gel, ultrasonic stirring process 30-40 minute, adds epoxy chloropropane, and raised temperature is 80-85 DEG C, insulated and stirred 3-4 hour, 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.