CN1273554C - High decorative texture antibacterial powdered paint and its manufacturing method - Google Patents

Abstract

The present invention relates to powdery paint with high-decoration texture and antibacterial performance, and a manufacturing method thereof. The powdery paint contains thermosetting resin, 0.1 to 3 wt% of nanometer antibacterial agent whose particle diameter is smaller than 100 nanometers, 0.5 to 5 wt% of texture agent and metal pigment. The powdery paint is manufactured by the steps that (1) the raw materials are proportionally prepared and are mixed and dispersed for 3 to 5 minutes at high speed at normal temperature; (2) the mixed materials are melted and extruded through a high-temperature extruding machine (a first region is at the temperature of 70 to 80 DEG C, and a second region is at the temperature of 100 to 120 DEG C); (3) the extruded materials are cooled, pressed and initially pulverized; (4) the initially pulverized materials are ground into fine powder under the condition that the room temperature is below 25 DEG C, and the fine powder is sieved by a sieve with more than 140 meshes. The powdery paint of the present invention has strong effect of appearance decoration and good antibacterial performance, and the effect of the powdery paint of the resistance to escherichia coli, staphylococcus aureus and other bacteria can reach 99%. The powdery paint can be widely used for domestic electric appliances, buildings, domestic articles, traffic equipment, etc.

Description

High texture antibacterial powder paint and the manufacture method thereof of decorating

Technical field

The present invention relates to a kind of germ resistance powder coating and manufacture method thereof, especially relate to and a kind ofly have the high texture of decorating concurrently and have the powder coating and the manufacture method thereof of anti-microbial property again.

Background technology

Adopting technologies such as electrostatic spraying, thermosetting powder coating(s)s such as polyester are sprayed on the metallic surface, not only make product smooth surface beauty, still is a kind of little coating process that pollutes, and compares with common coating to have more development prospect.But the metallic surface of application powder coating is encroached on by harmful microbes such as bacterium, mould still unavoidably.Such as the place of frequent contact such as the shell of refrigerator, refrigerator-freezer, dishwasher, washing machine, the kitchen cabinet in kitchen, the food-shelf in shop water, when temperature is suitable, just can breed bacterium, mould in a large number; The part metals equipment of diet job shop, medicine job shop, the handle handrail of motorbus, waiting room, metal tables and chairs, and the medical facilities walkie fork lift truck in the metal toy, hospital etc. all is the media that infects various diseases easily.In order to address this problem, there is a small amount of document to announce the prescription of antibacterial powder paint both at home and abroad.As laid-open U.S. Patents on May 22nd, 2003 (publication number US2003/0096017A1), relate to a kind of antibacterial powder paint, antiseptic-germicide is uniformly distributed in the coating.

The characteristics of decorating texture type powder coating are that film coated surface has decorative pattern clearly attractive in appearance, give the application object with the colorful outward appearance of beauty.Known have tangerine line, mallear stria, flash of light sand streak, reticulate pattern, several big classes such as marble grain, splendid decorative appearance and stereoscopic sensation are arranged, not only the property covered up to coarse workpiece surface is strong, but also has firm durable, the wear-resisting wiping of filming, characteristics such as mar-proof and chemical resistance.Be applicable to object surfaces applications such as foundry goods, drawpiece, heavy-duty machinery, engineering component, spot welding member, chemical industry refrigeration equipment, cooker, steel pipe, framework, electromechanical equipment, hardware ﹠ tools, textile manufacturing machine, instrument.

But, decorate texture type powder coating surface irregularity, especially high decoration texture powder coating is all the more so, and breed bacteria also is difficult to merge with antiseptic-germicide easily.So, do not find to contain simultaneously the high powder coating bibliographical information of decorating texture agent and antiseptic-germicide so far as yet.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of antiseptic-germicide and parent fully merges, anti-microbial property strong, decorate good powder coating and the manufacture method thereof of grain effect.

The object of the present invention is achieved like this: the present invention is high to be decorated the texture antibacterial powder paint and contains thermosetting resin, particle diameter nano antibacterial agent, 0.5%-5% (weight) texture agent and the metallic pigment less than the 0.1%-3% (weight) of 100 nanometers.

Described thermosetting resin is one of Resins, epoxy, vibrin, epoxy/polyester resin, acrylic resin and urethane resin.

Texture agent and metallic pigment decision exterior decorative effect.Described texture agent is one of sludge ice agent, speckle agent, some flower diffusant, sand streak agent, can regulate the consumption of texture agent at 0.5%-5% (weight), obtains customer satisfaction system grain effect.The hammer sense of powder mainly realizes by metallic pigment.Because the singularity of powder coating at first requires it high temperature resistant to metallic pigment, promptly do not shade or obfuscation slightly greater than 180 ℃ of bakings.Usually the metallic pigment of usefulness are aluminium powder or copper bronze, and are the same with painting, can make golden yellow, copper-colored mallear stria with the copper bronze, and the metallic pigment consumption can influence the hammer sense very little; Consumption is too big, because the accumulation of metallic pigment then can't form decorative pattern clearly, test shows that consumption is that 0.5%-3% is proper.

Described nano antibacterial agent is nanometer-level silver, copper, zinc or cuprous ion inorganics, particle diameter is preferably the 40-90 nanometer, it not only has good consistency with each component of powder coating, can not cause painting color, smell and change of stability after the adding, and can stand the temperature required test of powder coating solidification, do not influence its processing characteristics simultaneously.Anti-microbial property depends primarily on silver, copper, zinc or the cuprous ion in the mineral-type antiseptic-germicide, with the silver ions is example, its antibiotic mechanism: the one, contact reacts promptly after silver ions in the antiseptic-germicide and the bacterium contact reacts, causes the microorganism proper constituent to destroy or produce dysfunction.After thalline lost activity, silver ions can dissociate out from thalline again, repeats fungicidal property, so its antibacterial effect is lasting.The 2nd, light-catalyzed reaction.Under the effect of light, silver ions plays catalytic active center, activates the oxygen in the water and air, produces hydroxyl radical free radical (OH) and active oxygen ion (O ^2-), active oxygen ion has very strong oxidation capacity, can destroy the multiplication capacity of bacterium at short notice and makes necrocytosis.Thereby reach the antimicrobial purpose.Above-mentioned height is decorated the manufacture method of texture antibacterial powder paint, it is characterized in that step in the following order:

(1) thermosetting resin, solidifying agent, filler, pigment, texture agent, additive, nano antibacterial agent are prepared in proportion, high-speed mixing was disperseed 3-5 minute at normal temperatures;

(2) material that mixes is melt extruded the processing design temperature difference of different resins through high temperature forcing machine (a district temperature 70-80 ℃, two district temperature 100-120 ℃);

(3) material after extruding cools off, compressing tablet and just pulverizing;

(4) it is broken that the material that will just pulverize carries out fine powder under degree centigrade situation of room temperature＜25, sieves through the above mesh screen of 140 orders and make.

Because nano antibacterial agent is very little, add that high-speed mixing and high-temperature fusion extrude, so antiseptic-germicide can fully merge with parent.

Powder coating of the present invention has very strong exterior decorative effect and excellent antibiotic performance.

The present invention all has good inhibition effect to intestinal bacteria, gold-coloured staphylococci, pseudomonas aeruginosa, suis, malicious mould, melanomyces, Bacillus subtilus, hepatitis virus, Candida albicans etc.Can reach 99% antibacterial effect (37 ℃ 23h), and do not influence the performance of coating itself by test.

Powder coating of the present invention can be widely used in household electrical appliance, material of construction, household supplies (kitchen range, water-heater, electric cooker etc.), transportation equipment etc.The powder coating ratio maximum of using at the decorative painting of China's household electrical appliance and other indoor article, raising along with people's living standard, and to healthy growing interest, this antibacterial powder paint is very huge in the application prospect of household electrical appliance and upholstery.

Embodiment

Nanometer-level silver, copper, zinc or cuprous ion inorganics nano antibacterial agent be domestic existing matured product at present, and production unit comprises Zhoushan Tomorrow Nanomaterials Co., Ltd, honor industry nano material company limited and the inferior goldenly nano material of Lishui of Zhejiang company limited.

Following examples are understood the present invention in detail, in these embodiments, and percentages.

Embodiment 1

Prepare raw material in following composition and ratio:

Resins, epoxy 70%

Replace Dyhard RU 100 3.5%

Flow agent (polyacrylic acid) 1%

Texture agent 1%

Barium sulfate 15%

Lime carbonate 7%

St-yrax 0.5%

Optical brightener 0.5%

Nano antibacterial agent 0.5%

Metallic pigment (copper bronze) 1%

With above-mentioned raw materials high-speed mixing dispersion at normal temperatures 5 minutes, the material that mixes is through high temperature forcing machine (70 ℃ of district's temperature, 100 ℃ of two district's temperature) melt extrude, through overcooling, compressing tablet and pulverizing just, the material of just pulverizing is carried out fine powder under ℃ situation of room temperature＜25 broken, makes sieving through the above mesh screen of 140 orders.

The powder coating that makes passes through the high pressure static electricity spray gun, is coated with to be contained on the set iron of handling, and through after the baking film forming of 180--200 ℃/10-20min, at the antibacterial experiment of filming, it is antibiotic greater than 99%, and antibacterial ability is arranged.

Embodiment 2

Prepare raw material in following composition and ratio:

Resins, epoxy 37%

Vibrin 37%

Texture agent 3%

Barium sulfate 13%

Lime carbonate 7%

St-yrax 0.5%

Optical brightener 0.5%

Nano antibacterial agent 1%

Metallic pigment (aluminium powder) 0.5%

With above-mentioned raw materials high-speed mixing dispersion at normal temperatures 3 minutes, the material that mixes is through high temperature forcing machine (80 ℃ of district's temperature, 110 ℃ of two district's temperature) melt extrude, through overcooling, compressing tablet and pulverizing just, the material of just pulverizing is carried out fine powder under ℃ situation of room temperature＜25 broken, makes sieving through the above mesh screen of 140 orders.

The powder coating that makes passes through the high pressure static electricity spray gun, is coated with to be contained on the set iron of handling, and through after the baking film forming of 180--200 ℃/10-20min, at the antibacterial experiment of filming, it is antibiotic greater than 99%, and antibacterial ability is arranged.

Embodiment 3

Prepare raw material in following composition and ratio:

Vibrin 76%

TGIC 5.7％

Texture agent 0.8%

Barium sulfate 12%

St-yrax 0.5%

Nano antibacterial agent 2%

Metallic pigment (aluminium powder) 3%

With above-mentioned raw materials high-speed mixing dispersion at normal temperatures 5 minutes, with material process high temperature forcing machine (75 ℃ of the district's temperature that mix, 120 ℃ of two district's temperature) melt extrude, through overcooling, compressing tablet and pulverizing just, the material of just pulverizing is carried out fine powder under ℃ situation of room temperature＜25 broken, makes sieving through the above mesh screen of 140 orders.

The powder coating that makes passes through the high pressure static electricity spray gun, is coated with to be contained on the set iron of handling, and through after the baking film forming of 180--200 ℃/10-20min, at the antibacterial experiment of filming, it is antibiotic greater than 99%, and antibacterial ability is arranged.

Embodiment 4

Prepare raw material in following composition and ratio:

Acrylic resin 66%

DDDA 18.4％

Texture agent 1%

Barium sulfate 10.1%

St-yrax 0.5%

Nano antibacterial agent 3%

Metallic pigment (copper bronze) 1%

With above-mentioned raw materials high-speed mixing dispersion at normal temperatures 5 minutes, with material process high temperature forcing machine (80 ℃ of the district's temperature that mix, 110 ℃ of two district's temperature) melt extrude, through overcooling, compressing tablet and pulverizing just, the material of just pulverizing is carried out fine powder under ℃ situation of room temperature＜25 broken, makes sieving through the above mesh screen of 140 orders.

The powder coating that makes passes through the high pressure static electricity spray gun, is coated with to be contained on the set iron of handling, and through after the baking film forming of 180--200 ℃/10-20min, at the antibacterial experiment of filming, it is antibiotic greater than 99%, and antibacterial ability is arranged.

High bacteriostasis rate detection method of decorating the texture antibacterial powder paint

With ready bacterium liquid mixing, with the 1ml quantitative calibrated pipet of sterilizing, carefully pipette 1ml bacterium liquid respectively, be added in respectively on the high style of decorating the texture antibacterial powder paint of test and blank is high decorates on the texture powder coating, and keep it to be evenly distributed.

To be cooled to 45-50 ℃ nutrient agar to going in the culture dish, about every ware 20ml.

After treating that nutrient agar medium solidifies, be inverted in to cultivate in 37 ± 1 ℃ of constant incubators and took out in 23 hours, calculate bacterium colony number in the ware, multiply by extension rate, promptly get the contained total plate count of each sample.

During counting plate bacterium colony, can detect by an unaided eye, must the time use lens examination, in case omission.After writing down the colony number of each plate, obtain respectively for sample and the average colony number of each plate of blank sample.

Result and calculating

Bacteriostasis rate=(blank plate colony number-confession examination plate colony number)/blank plate colony number * 100%.

Fungistatic effect is greater than 99%.

Claims (7)

1, a kind of high decoration texture antibacterial powder paint is characterized in that described coating contains thermosetting resin, particle diameter nano antibacterial agent, texture agent and the metallic pigment less than 100 nanometers; Wherein said particle diameter accounts for the 0.1%-3% of formulation for coating material gross weight less than the nano antibacterial agent consumption of 100 nanometers, and the two total consumption of texture agent and metallic pigment accounts for the 0.5%-5% of formulation for coating material gross weight.

2, the high texture antibacterial powder paint of decorating according to claim 1 is characterized in that described thermosetting resin is one of Resins, epoxy, vibrin, epoxy/polyester resin, acrylic resin and urethane resin.

3, the high texture antibacterial powder paint of decorating according to claim 1 is characterized in that described nano antibacterial agent is nanometer-level silver ion inorganics, nanosized copper ion inorganics, nano level zine ion inorganics or nano level cuprous ion inorganics.

4, according to claim 1 or the 3 described high texture antibacterial powder paints of decorating, it is characterized in that described nano antibacterial agent particle diameter is the 40-90 nanometer.

5, the high texture antibacterial powder paint of decorating according to claim 1 is characterized in that described texture agent is sludge ice agent, speckle agent, some flower diffusant or sand streak agent.

6, the high texture antibacterial powder paint of decorating according to claim 1 is characterized in that described metallic pigment are aluminium powder or copper bronze, counts by weight percentage to occupy 0.5%-3% in powder coating.

7, high manufacture method of decorating the texture antibacterial powder paint according to claim 1 is characterized in that step in the following order:

(1) thermosetting resin, solidifying agent, filler, pigment, texture agent, additive, nano antibacterial agent are prepared in proportion, high-speed mixing was disperseed 3-5 minute at normal temperatures;

(2) material that mixes is melt extruded through the high temperature forcing machine, forcing machine one district's processing temperature is set 70 ℃-80 ℃, and two district's processing temperatures are set 100 ℃-120 ℃, the processing design temperature difference of different resins, but all in this restricted portion, select;

(3) material after extruding cools off, compressing tablet and just pulverizing;

(4) it is broken that the material that will just pulverize carries out fine powder under degree centigrade situation of room temperature＜25, sieves through the above mesh screen of 140 orders and make.