CN106189681A - A kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint, with bisphenol-A and epoxychloropropane as raw material, CNT is heat filling, modified epoxy is obtained by situ aggregation method, CNT is made to form the active force much larger than Van der Waals force with epoxide group, be conducive to Stress Transfer between the two, improve interface binding power between the two and the compatibility, improve coating storage stability；Add chitosan, modification helps material etc. for reinforcer simultaneously, the stretching vibration strength reduction of carbon chlorine key in composite, C, Cl atom strengthens with the adhesion of neighboring atom, improve each component dispersibility in coating, CNT and coating is promoted to be fully contacted and play the effect of extra physical crosslinking point, form heat dissipation channel, effectively solve the problem that the radiating effect of high-power electronic product is bad, and the powdery paints environmental protection of present invention offer, safety, there is the combination properties such as good scratch resistance, hardness is high, adhesive force is good.

Description

A kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint and preparation method thereof

Technical field

The present invention relates to powder coating technology field, particularly relate to a kind of environment-friendly type scratch resistance epoxy resin-matrix heat radiation powder and be coated with Material and preparation method thereof.

Background technology

Along with the fast development of modern science and technology, the intensive and miniaturization of the high frequency of electronic device, high speed and integrated circuit, The overall power density and the caloric value that make unit volume electronic device increase by a wide margin, so that the cooling problem of electronic device Become increasingly to highlight.And the cooling capacity that the cooling system of routine can reach is by great challenge, especially at the energy, vapour The fields such as car, air-conditioning, agricultural, chemical industry, heating, Aero-Space, microelectronics, information, to augmentation of heat transfer, improve the skills such as radiating efficiency Art is had higher requirement.And heat radiation coating is a kind of body surface radiating efficiency that improves, reduce the extraordinary painting of system temperature Material.Powdery paints is a kind of novel without solvent 100% solid powdery coating, have high usage, easy application, corrosion-resistant, The advantages such as environmental protection, are widely applied in modern times spraying and anticorrosion field of radiating, heat-dissipation powder paint are coated in electronics device The radiating efficiency of electronic device can be significantly improved on part.

Epoxy resin is one of very important thermoset macromolecule material, has adhesion strength high, and electrical insulation capability is good, The advantages such as shrinkage factor is low, good processability, are widely used in each fields such as electronics, machinery, building.CNT has higher Thermal conductivity, therefore CNT is filled in epoxy resin as packing material and has well as a kind of heat sink material Application prospect, but due to the nano effect of CNT, the most difficult dispersion of CNT.In order to improve nanometer Carbon pipe dispersibility in the epoxy, is mostly by CNT graft modification, destroys the structure of CNT so that it is produce Raw defect, these defects are conducive to the scattering of phonon, reduce the heat conductivility of CNT.So that improve existing method Improve CNT dispersibility in the epoxy.Situ aggregation method is due to the molecular weight of monomer, and viscosity is low, is conducive to Nanoparticle in monomer polymerization process in substrate dispersion, and the knot of situ aggregation method not destroying carbon nanometer tube Structure.

" preparation of carbon nano tube/epoxy resin composite powder coatings and performance study thereof " literary grace bisphenol-A and epoxy Chloropropane is raw material, and CNT, as strengthening and heat filling, is prepared for carbon nano tube/epoxy resin by situ aggregation method Composite.Result shows: along with increasing of content of carbon nanotubes, the properties of powdery paints gradually improves.Yet with CNT bad dispersibility in composite powder coatings is easily reunited, when content of carbon nanotubes continues to increase, composite Properties is deteriorated again, and utilizes the function of composite powder coatings that the production technology in literary composition and formula prepare the most single, Product structure is single without characteristic, it is impossible to meet requirement in special environment, needs to be improved.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of environment-friendly type scratch resistance epoxy resin-matrix heat radiation Powdery paints and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint, is prepared by the raw materials in: bisphenol-A 32-36, ring Oxygen chloropropane 18-20, CNT 3.6-3.9, chitosan 1-3, APTES 2.7-2.9, attapulgite Soil 8-9, tributyl citrate 4-6, graphite fibre 3-5, dipropylenetriamine 2-4, Drymaria diandra Blume 12-14, acrylic acid ester emulsion 7- 9, tea polyphenols 1.4-1.7, pigment 4-5.

The manufacture method of described a kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint, comprises the following steps:

(1) dried by Drymaria diandra Blume, attrition grinding crosses 200 mesh sieves, adds acrylic acid ester emulsion stirring and evenly mixing standing 12-14 little Time, pelletize, within 20-30 minute, obtain premix material in 800-1000 DEG C of sintering under nitrogen protection；

(2) being calcined 2-3 hour at 715-800 DEG C by attapulgite, discharging is cooled to 60 DEG C-80 DEG C, adds 3-aminopropyl Triethoxysilane, graphite fibre ultrasonic disperse 20-30 minute, addition step (1) premix material, the abundant ball milling of tea polyphenols, pelletize, Particle diameter is 2-4 μm, obtains and modified helps material；

(3) bisphenol-A is put in the sodium hydroxide solution of 10% and be heated to 60 DEG C of stirring and evenly mixings, be cooled to 55 DEG C and add carbon nanometer Pipe ultrasonic disperse 30 minutes, is warming up to 80 DEG C and adds epoxychloropropane, tributyl citrate holding temperature ultrasonic disperse 4 hours, Alternately and repeatedly being washed till neutrality with cold water and 80 DEG C of hot water, 50 DEG C of oven drying at low temperatures obtain modified epoxy；

(4) modified epoxy, chitosan and other residual componentss that step (3) prepares are put into stirring in high-speed mixer mixed Even, melt extrude through double screw extruder, cool down pulverizing, cross 250-300 mesh sieve, discharging.

The invention have the advantage that the present invention with bisphenol-A and epoxychloropropane as raw material, CNT is heat filling, logical Cross situ aggregation method and obtain modified epoxy, make CNT form the active force much larger than Van der Waals force with epoxide group, Be conducive to Stress Transfer between the two, improve interface binding power between the two and the compatibility, improve coating storage steady Qualitative；Add chitosan simultaneously, modification help material etc. for reinforcer, the stretching vibration strength reduction of carbon chlorine key in composite, C, Cl atom strengthens with the adhesion of neighboring atom, improves each component dispersibility in coating, promotes CNT and painting Material is fully contacted and plays the effect of extra physical crosslinking point, forms distributing of heat dissipation channel, beneficially heat, effectively solves The problem that certainly radiating effect of high-power electronic product is bad, and the powdery paints that provides of the present invention is without organic solvent, environmental protection, Safety, also has the combination properties such as good scratch resistance, hardness is high, adhesive force is good.

Detailed description of the invention

A kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint, is prepared by the raw materials in: bisphenol-A 32, Epoxychloropropane 18, CNT 3.6, chitosan 1,3 aminopropyltriethoxywerene werene 2.7, attapulgite 8, citric acid three Butyl ester 4, graphite fibre 3, dipropylenetriamine 2, Drymaria diandra Blume 12, acrylic acid ester emulsion 7, tea polyphenols 1.4, pigment 4.

The manufacture method of described a kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint, comprises the following steps:

(1) dried by Drymaria diandra Blume, attrition grinding crosses 200 mesh sieves, adds acrylic acid ester emulsion stirring and evenly mixing standing 12-14 little Time, pelletize, within 20-30 minute, obtain premix material in 800-1000 DEG C of sintering under nitrogen protection；

(2) being calcined 2-3 hour at 715-800 DEG C by attapulgite, discharging is cooled to 60 DEG C-80 DEG C, adds 3-aminopropyl Triethoxysilane, graphite fibre ultrasonic disperse 20-30 minute, addition step (1) premix material, the abundant ball milling of tea polyphenols, pelletize, Particle diameter is 2-4 μm, obtains and modified helps material；

(3) bisphenol-A is put in the sodium hydroxide solution of 10% and be heated to 60 DEG C of stirring and evenly mixings, be cooled to 55 DEG C and add carbon nanometer Pipe ultrasonic disperse 30 minutes, is warming up to 80 DEG C and adds epoxychloropropane, tributyl citrate holding temperature ultrasonic disperse 4 hours, Alternately and repeatedly being washed till neutrality with cold water and 80 DEG C of hot water, 50 DEG C of oven drying at low temperatures obtain modified epoxy；

(4) modified epoxy, chitosan and other residual componentss that step (3) prepares are put into stirring in high-speed mixer mixed Even, melt extrude through double screw extruder, cool down pulverizing, cross 250-300 mesh sieve, discharging.

The storage stability utilizing the heat-dissipation powder paint that the present invention prepares improves 1 times than pure epoxy resin；Anti-impact The ability of hitting is 36kg cm；Adhesive force and resistance to Neutral Salt Spray Corrosion grade are 2 grades；Thermal conductivity is 0.561W/mK.

Claims (2)

1. an environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint, it is characterised in that be prepared by the raw materials in: Bisphenol-A 32-36, epoxychloropropane 18-20, CNT 3.6-3.9, chitosan 1-3, APTES 2.7-2.9, attapulgite 8-9, tributyl citrate 4-6, graphite fibre 3-5, dipropylenetriamine 2-4, Drymaria diandra Blume 12-14, Acrylic acid ester emulsion 7-9, tea polyphenols 1.4-1.7, pigment 4-5.

The manufacture method of a kind of environment-friendly type scratch resistance epoxy resin-matrix heat-dissipation powder paint the most according to claim 1, it is special Levy and be to comprise the following steps:

(1) dried by Drymaria diandra Blume, attrition grinding crosses 200 mesh sieves, adds acrylic acid ester emulsion stirring and evenly mixing standing 12-14 little Time, pelletize, within 20-30 minute, obtain premix material in 800-1000 DEG C of sintering under nitrogen protection；

(2) being calcined 2-3 hour at 715-800 DEG C by attapulgite, discharging is cooled to 60 DEG C-80 DEG C, adds 3-aminopropyl Triethoxysilane, graphite fibre ultrasonic disperse 20-30 minute, addition step (1) premix material, the abundant ball milling of tea polyphenols, pelletize, Particle diameter is 2-4 μm, obtains and modified helps material；

(3) bisphenol-A is put in the sodium hydroxide solution of 10% and be heated to 60 DEG C of stirring and evenly mixings, be cooled to 55 DEG C and add carbon nanometer Pipe ultrasonic disperse 30 minutes, is warming up to 80 DEG C and adds epoxychloropropane, tributyl citrate holding temperature ultrasonic disperse 4 hours, Alternately and repeatedly being washed till neutrality with cold water and 80 DEG C of hot water, 50 DEG C of oven drying at low temperatures obtain modified epoxy；

(4) modified epoxy, chitosan and other residual componentss that step (3) prepares are put into stirring in high-speed mixer mixed Even, melt extrude through double screw extruder, cool down pulverizing, cross 250-300 mesh sieve, discharging.