CN105949955A

CN105949955A - Powder coating for heating radiator surface and preparation method thereof

Info

Publication number: CN105949955A
Application number: CN201610418071.2A
Authority: CN
Inventors: 陈俊; 刘学涛; 赵遵刚; 霍柏林; 李正; 孙红兴
Original assignee: Yan Mei Powdery Paints Co Ltd Of Hefei City
Current assignee: Yan Mei Powdery Paints Co Ltd Of Hefei City
Priority date: 2016-06-08
Filing date: 2016-06-08
Publication date: 2016-09-21

Abstract

The invention provides a powder coating for a heating radiator surface. The powder coating is prepared from, by weight, 10-15 parts of novolac epoxy, 50-60 parts of diphenol propane epoxy resin, 5-8 parts of organic silicon resin, 4-10 parts of hexamethylenetetramine, 2-4 parts of ethylene propylene rubber, 1-3 parts of polyethylene wax, 15-18 parts of titanium dioxide, 1-2 parts of a silane coupling agent, 10-15 parts of propylene glycol, 5-8 parts of dimethicone, 15-18 parts of calcium carbonate, 1-2 parts of butyl rubber, 0.1-0.2 part of beta-(3,5-ditert-butyl-4-hydroxyphenyl)propionic n-octadecanol ester, 0.1-0.2 part of dual-dodecanol ester, 5-8 parts of hollow glass microspheres, 2-4 parts of nanocarbon, and 0.1-0.3 part of modified anion powder. The powder coating has the advantages of being resistant to high temperature, good in fire resistance, good in insulation performance, low in curing temperature, short in curing time, good in film leveling property, high in adhesive force, good in film appearance, resistant to acid-base, capable of being used for household appliances such as induction furnaces, microwave ovens, ovens and heating radiators, and can also achieve the effect of purifying air.

Description

A kind of radiator surface powdery paints and preparation method thereof

Technical field

The invention belongs to paint field, a kind of radiator surface powdery paints and preparation method thereof.

Background technology

Progress and the development of modern industry along with modern science and technology so that problem of environmental pollution becomes day by day to dash forward Going out, the environment that it depends on for existence to the mankind itself and the mankind causes threat greatly.Traditional coating was either manufacturing All can produce substantial amounts of poisonous and hazardous waste gas and waste water in journey or in using work progress, they can be to environment, air And water resource pollutes, especially solvent based coating, work progress can discharge VOC (VOC) to big In gas, its amount has reached more than 50% and has caused serious second time to pollute.This problem causes the attention of many industrial countries.

Powdery paints obtains in recent years as a class environmental type coating in terms of various fields particularly coated metal It is widely applied.Powdery paints is often using organic resins such as epoxy, polyester, acrylic acid, polyurethane as matrix, due to by matrix The impact of resin self structure and restriction, these conventional powdery paints also exist weak point in some performances, and result in should The limitation used.

Compared with common organic resin, organic siliconresin has the most excellent heat-resisting, weather-proof, resistance to water and electric insulation Performance.Powdery paints uses organic siliconresin, its thermostability and weatherability can be improved, but use merely organic siliconresin to deposit Expensive, to problems such as base material poor adhesive force.Therefore, often utilize organic siliconresin other organic resins modified, can be by The advantage of organic siliconresin and other organic resins combines, and makes up mutual deficiency, improves the property such as paint film is weather-proof, heat-resisting Can, obtaining the powdery paints of excellent performance, this is also an effective way of development functional powder coating.But due to organic Silicones differs greatly with the solubility parameters of organic resin, and the compatibility is poor, and in the case of directly mixing, organosilicon has spilling existing As, at surface enrichment, it is susceptible to microphase-separated.And the appearance of microphase-separated, to the modified hardness of resin, stability and machinery Performance all has a great impact, and the overall performance of final film is bad.

Heat Resistant Powder Coatings can be widely applied to the row such as electrical equipment, metallurgy, oil, aviation field, chemical industry, medicine, food The various high temperature resistant equipment of industry is (such as: oven, warm-air drier, high-power lamp decoration, caliduct, automobile and motorcycle silencer, height Temperature stove, chimney etc.).Although the relatively oil paint environmental protection of existing Heat Resistant Powder Coatings, but owing to its cost is the highest and needs height Temperature solidification (minimum 230 DEG C × 20 minutes of condition of cure) limits it and promotes the use of.

Developing low-cost normal temperature cure Heat Resistant Powder Coatings can make the powdery paints of environmental protection replace paint to be applied to above-mentioned Various high temperature resistant equipment, have very much market.

Summary of the invention

The invention provides a kind of radiator surface powdery paints, the powdery paints of the present invention has high temperature resistant, fire-retardant Property is good, and good insulating, simultaneously solidification temperature are low, and hardening time is short, film good leveling property, and adhesive force is strong, appearance of film good, acidproof Alkali, has the effect purifying air, can be used on the household appliances such as electromagnetic oven, microwave oven, baking box, radiator.

Technical scheme is as follows:

A kind of radiator surface powdery paints, it is characterised in that: prepared by the component raw material of following weight portion: phenolic aldehyde ring Epoxy resins 10-15, propanepoxy resin 50-60, organic siliconresin 5-8, hexamethylenetetramine 4-10, EP rubbers 2- 4, Tissuemat E 1-3, titanium dioxide 15-18, silane coupler 1-2, propylene glycol 10-15, dimethicone 5-8, calcium carbonate 15- 18, butyl rubber 1-2, β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid positive octadecanol ester 0.1-0.2, double Lauryl Alcohol Ester 0.1-0.2, hollow glass micro-ball 5-8, nano-sized carbon 2-4, modified negative-ion powder 0.1-0.3,

Described anion powder is made up of by mass parts following component: rare ice stone 10-15, coral fossil 8-10, tourmaline 10-15, opal 30-50, Maifanitum 2-4, zeolite 2-4, hokutolite 2-4, jade powder 2-4, kieselguhr 15-20, three oxidations two Ferrum 2-4, aluminium sesquioxide 3-4, weigh each component raw material by formula proportion, is placed in Muffle furnace and is heated to 300-600 DEG C Rear insulation 1-2h makes it activate, and is cooled in room temperature addition grinding equipment carry out superfine grinding to granule at below 100nm, by it Being placed in high speed agitator, silane coupler KH560 elder generation room temperature mixed at high speed 5-10 being subsequently adding powder quality 1-3% is divided Clock, the superfine light calcium carbonate of addition powder quality 20-30%, the diethylaminopropylamine of 1-2%, high-speed stirred 10-20 minute, Sieve, be dried, can be prepared by anion powder.

Described radiator surface powdery paints, it is characterised in that: prepared by the component raw material of following weight portion: phenolic aldehyde Epoxy resin 13, propanepoxy resin 55, organic siliconresin 6, hexamethylenetetramine 6, EP rubbers 3, Tissuemat E 2, titanium dioxide 17, silane coupler 2, propylene glycol 13, dimethicone 7, calcium carbonate 17, butyl rubber 2, β-(3,5-bis-tertiary fourths Base-4-hydroxy phenyl) propanoic acid positive octadecanol ester 0.1, double Lauryl Alcohol ester 0.1, hollow glass micro-ball 6, nano-sized carbon 3, modified Anion powder 0.2,

Described anion powder is made up of by mass parts following component: rare ice stone 14, coral fossil 9, tourmaline 13, albumen Stone 40, Maifanitum 3, zeolite 3, hokutolite 3, jade powder 3, kieselguhr 18, iron sesquioxide 3, aluminium sesquioxide 3, by recipe ratio Example weighs each component raw material, is placed in Muffle furnace insulation 2h after being heated to 500 DEG C and makes it activate, is cooled to room temperature and adds stone roller Mill equipment carries out superfine grinding to granule at below 100nm, be placed in high speed agitator, be subsequently adding powder quality The silane coupler KH560 elder generation room temperature mixed at high speed of 2% 8 minutes, adds the superfine light calcium carbonate of powder quality 25%, The diethylaminopropylamine of 1.5%, high-speed stirred 15 minutes, sieve, be dried, can be prepared by anion powder.

The preparation method of described radiator surface powdery paints, it is characterised in that comprise the following steps:

(1) first by raw materials used coarse pulverization before use to 70 mesh, each component raw material is weighed by formula proportion；

(2) titanium dioxide, hollow glass micro-ball are put in the hydrochloric acid solution of 10% and soak 20-30 minute, be subsequently adding hydrogen In sodium hydroxide solution and filter, first filtering residue is put in high temperature furnace, 500-600 DEG C calcine 50-60min, the coldest But to room temperature, then the silane coupler of filtering residue gross mass 5% is joined filtering residue high speed stirring mixing 20-30 minute, then Add dimethicone, then high-speed stirred mixes 10-20 minute, is dried, stand-by；

(3) then will weigh raw material by formula proportion and mixed material that step (1) obtains put into homogenizer in high Speed mix homogeneously；

(4) then input extruder, after 60-95 DEG C of melting mixing 20min, is extruded, is cooled to room temperature, then pulverizes and sieves To 190 mesh, i.e. obtain finished product.

Beneficial effect

The present invention uses novolac epoxy resin, propanepoxy resin, organic siliconresin hybrid resin as film forming Material, epoxy resin has corrosion resistance, chemical stability and the adhesive property of excellence, and polyester resin has high intensity, wear-resisting Property is good, organic siliconresin have thermo oxidative stability, good insulating properties, prominent weatherability, also have waterproof, Defend salt fog, The characteristic such as mould proof, respective advantage is combined by several resin-bonded, makes up mutual deficiency, improves paint film corrosion-resistant The multiple performance such as property, wearability, high temperature resistant, weatherability, obtains the powdery paints that properties is the most excellent；

Coating adds modification self-control anion powder, can in room anion releasing, release anion tool Killing pathogenic bacteria, absorb the foreign flavor indoors such as formaldehyde, purify the effect of air, improve indoor environment, modified anion powder carries The high compatibility with coating, improves the weatherability of film, improves the storage stability of thermosetting powder coating；

In the preparation, first by after titanium dioxide, hollow glass micro-ball acidifying, at high-temperature activation, then change with silane coupler Property, then be sufficiently mixed with dimethicone, the mixed material of gained good dispersion in coating, with other compositions such as resins The compatibility strengthens, and promotes the reactivity of each material composition, reduces solidification temperature, shortens hardening time.

In a word, the powdery paints of the present invention has high temperature resistant, good flame resistance, and good insulating, simultaneously solidification temperature are low, solidification Time is short, film good leveling property, and adhesive force is strong, appearance of film good, acid and alkali-resistance, can be used for electromagnetic oven, microwave oven, baking box, heating installation On the household appliances such as sheet.

Detailed description of the invention:

A kind of radiator surface powdery paints, is prepared by the component raw material of following weight (kg): novolac epoxy resin 13, Propanepoxy resin 55, organic siliconresin 6, hexamethylenetetramine 6, EP rubbers 3, Tissuemat E 2, titanium dioxide 17, Silane coupler 2, propylene glycol 13, dimethicone 7, calcium carbonate 17, butyl rubber 2, β-(3,5-di-t-butyl-4-hydroxy benzeness Base) propanoic acid positive octadecanol ester 0.1, double Lauryl Alcohol ester 0.1, hollow glass micro-ball 6, nano-sized carbon 3, modified negative-ion powder 0.2,

Wherein anion powder is made up of by mass parts following component: rare ice stone 14, coral fossil 9, tourmaline 13, opal 40, Maifanitum 3, zeolite 3, hokutolite 3, jade powder 3, kieselguhr 18, iron sesquioxide 3, aluminium sesquioxide 3, by formula proportion Weigh each component raw material, be placed in Muffle furnace insulation 2h after being heated to 500 DEG C and make it activate, be cooled to room temperature addition and mill Equipment carries out superfine grinding to granule at below 100nm, be placed in high speed agitator, be subsequently adding powder quality 2% Silane coupler KH560 elder generation room temperature mixed at high speed 8 minutes, add the superfine light calcium carbonate of powder quality 25%, 1.5% Diethylaminopropylamine, high-speed stirred 15 minutes, sieve, be dried, can be prepared by anion powder.

The preparation method of radiator surface powdery paints, comprises the following steps:

By the electrostatic spraying apparatus used for powder coating (voltage 50KV, air pressure 0.05MPa, spray distance about 15cm) of the present invention Even application on the tinplate sheet (150x20mm x0.28mm) of pretreated (sand papering and alcohol washes), Ma Kou Iron plate should be at vertical hanging state, it is simple to powdery paints uniformly sprays above；Be hung vertically in an oven 120 DEG C, Solidification 16min film forming, forms thickness and is about the figure layer of 80 μm, naturally cool to room temperature, takes out after placing 24h, measures coating Can, film performance detection is as shown in table 1:

The performance of table 1 spray equipment gained film

As seen from Table 1, relatively good at the properties of 120 DEG C of solidification 16min gained films, this powdery paints is described Solidification temperature low, hardening time is short.

Claims

1. a radiator surface powdery paints, it is characterised in that: prepared by the component raw material of following weight portion: epoxy novolac Resin 10-15, propanepoxy resin 50-60, organic siliconresin 5-8, hexamethylenetetramine 4-10, EP rubbers 2- 4, Tissuemat E 1-3, titanium dioxide 15-18, silane coupler 1-2, propylene glycol 10-15, dimethicone 5-8, calcium carbonate 15- 18, butyl rubber 1-2, β-(3,5-di-t-butyl-4-hydroxy phenyl) propanoic acid positive octadecanol ester 0.1-0.2, double Lauryl Alcohol ester 0.1-0.2, hollow glass micro-ball 5-8, nano-sized carbon 2-4, modified negative-ion powder 0.1-0.3,

Described anion powder is made up of by mass parts following component: rare ice stone 10-15, coral fossil 8-10, tourmaline 10- 15, opal 30-50, Maifanitum 2-4, zeolite 2-4, hokutolite 2-4, jade powder 2-4, kieselguhr 15-20, iron sesquioxide 2- 4, aluminium sesquioxide 3-4, weighs each component raw material by formula proportion, is placed on after being heated to 300-600 DEG C in Muffle furnace and protects Temperature 1-2h makes it activate, and is cooled in room temperature addition grinding equipment carry out superfine grinding to granule at below 100nm, is put In high speed agitator, it is subsequently adding silane coupler KH560 elder generation room temperature mixed at high speed 5-10 minute of powder quality 1-3%, adds Enter the superfine light calcium carbonate of powder quality 20-30%, the diethylaminopropylamine of 1-2%, high-speed stirred 10-20 minute, sieve, It is dried, can be prepared by anion powder.

Radiator surface powdery paints the most according to claim 1, it is characterised in that: the component by following weight portion is former Material prepares: novolac epoxy resin 13, propanepoxy resin 55, organic siliconresin 6, hexamethylenetetramine 6, second the third rubber Glue 3, Tissuemat E 2, titanium dioxide 17, silane coupler 2, propylene glycol 13, dimethicone 7, calcium carbonate 17, butyl rubber 2, β-(3,5-di-t-butyl-4-hydroxy phenyl) propanoic acid positive octadecanol ester 0.1, double Lauryl Alcohol ester 0.1, hollow glass Microsphere 6, nano-sized carbon 3, modified negative-ion powder 0.2,

Described anion powder is made up of by mass parts following component: rare ice stone 14, coral fossil 9, tourmaline 13, opal 40, Maifanitum 3, zeolite 3, hokutolite 3, jade powder 3, kieselguhr 18, iron sesquioxide 3, aluminium sesquioxide 3, by formula proportion Weigh each component raw material, be placed in Muffle furnace insulation 2h after being heated to 500 DEG C and make it activate, be cooled to room temperature and add Grinding equipment carries out superfine grinding to granule at below 100nm, be placed in high speed agitator, be subsequently adding powder quality The silane coupler KH560 elder generation room temperature mixed at high speed of 2% 8 minutes, adds the superfine light calcium carbonate of powder quality 25%, 1.5% Diethylaminopropylamine, high-speed stirred 15 minutes, sieve, be dried, can be prepared by anion powder.

3. the preparation method of radiator surface powdery paints as claimed in claim 1, it is characterised in that include following step Rapid:

(2) titanium dioxide, hollow glass micro-ball are put in the hydrochloric acid solution of 10% and soak 20-30 minute, be subsequently adding sodium hydroxide In solution and filter, first filtering residue is put in high temperature furnace, 500-600 DEG C calcine 50-60min, then naturally cool to room Temperature, then the silane coupler of filtering residue gross mass 5% is joined filtering residue high speed stirring mixing 20-30 minute, it is subsequently adding diformazan Base silicone oil, then high-speed stirred mix 10-20 minute, be dried, stand-by；

(3) then will weigh raw material by formula proportion and mixed material that step (1) obtains put into homogenizer in the most mixed Close uniformly；

(4) then input extruder, after 60-95 DEG C of melting mixing 20 min, is extruded, is cooled to room temperature, then pulverized It is sieved to 190 mesh, i.e. obtains finished product.