CN101338089B - Emulation coating of die-casting magnalium and method for preparing same - Google Patents

Abstract

The invention discloses a die-cast magnalium emulation coating and a preparation method thereof; the invention selects phthalic anhydride, trimethylolpropane, dimethylbenzene used for refluxing, butylacetate, cyclohexanone, cellulose, 1053 aluminium powder and other 5 raw materials, adopts melting, esterification, refluxing, dilution, low-speed dispersion and filtration technological processes, solves the defects of the prior similar products of poor emulation and three resistance, does not contain heavy metal, benzene and formaldehyde; after application, the true color of the magnalium metalcan be restored; the coating has the advantages of strong adhesion force, high hardness, excellent impact resistance and flexibility, temperature resistance, static electricity resistance, radiationresistance and strong covering power; only 40g/m <2> of coating is needed for each layer of spray coating; in addition, the coating has strong cold and crackling resistance capability, makes up for the international gap, has wide scope of application, considerable social and economic benefit, and high promotion and application value.

Description

Emulation coating of die-casting magnalium and preparation method thereof

Technical field

The present invention relates to Chemicals and preparation method thereof, particularly a kind of emulation coating of die-casting magnalium and preparation method thereof.

Background technology

At present, die casting magnesium, aluminum alloy surface often can not be reacted the true qualities of magnesium, aluminum metal.About the technology of the special-purpose emulation coating of die-casting magnalium that is applicable to external coatings such as various die-casting magnalium alloys and other non-ferrous castings, plastics, buildings, bridge, electromechanical equipment, instrument, both there be not the data report, more do not have product to appear on the market.

Summary of the invention

In order to fill up domestic and international blank, the purpose of this invention is to provide a kind of emulation coating of die-casting magnalium and preparation method thereof.

Technical scheme of the present invention is:

1. the starting material selected for use of the present invention are: phthalic anhydride, TriMethylolPropane(TMP), lithium hydroxide, backflow are with dimethylbenzene, N-BUTYL ACETATE, pimelinketone, ethylene glycol ether acetate, Mierocrystalline cellulose, aldehyde ketone resin, 1053 aluminium powders, defoamer and flow agent.

2. concrete production process of the present invention is: fusing, esterification, backflow, detection, latting drown, filtration 1, low speed disperse and filter 2.

The present invention has following characteristics: 1. NBC protective performance is good, films to immerse 30% phosphoric acid liquid, 5% salt solution 10000h and dimethylbenzene 2000h, no change respectively.2. the anti-severe cold cracking ability of filming is strong, and coating does not contain heavy metal, benzene and formaldehyde, toxicological harmless.3. good simulation, reducible one-tenth magnalium metal true qualities after the applications such as magnalium metal and alloy thereof, iron and steel, plastics and timber.4. hardness of film is greater than the H level, and positive and negative shock strength reaches 50kg.cm, and the coated article surface adhesion force all can reach 1 grade, and snappiness is led the static rate and reached 10 less than 1mm ⁷Ω .cm.5. product can use in the environment below 200 ℃ for a long time; Strong covering power, the per pass spraying only needs 40g/m ²Coating; Radioprotective and thermal insulation are good, are used for the storage tank application, and the liquid temperature is hanged down 5 ℃-10 ℃ than conventional in jar.6. filled up domestic and international blank, economic results in society are considerable, and application value is big.

Description of drawings

Fig. 1 is a production technique block diagram of the present invention, and numerical markings is represented corresponding starting material respectively among the figure.

Embodiment

Now in conjunction with the accompanying drawings, technology contents of the present invention is described in detail.

1. starting material and the weight percent thereof selected for use of the present invention is:

1. phthalic anhydride: 9.6%-11.6%;

2. TriMethylolPropane(TMP) (TMP): 5.5%-7.5%;

3. lithium hydroxide: 0.01%;

4. reflux and use dimethylbenzene: 0.5%-0.7%;

5. N-BUTYL ACETATE: 63%-65%;

6. pimelinketone: 0.6%-0.8%;

7. ethylene glycol ether acetate (CAC): 0.3%-0.4%;

8. Mierocrystalline cellulose (beautiful produce): 14%-16%;

9. aldehyde ketone resin (moral product): 0.5%-0.7%;

10. 1053 aluminium powders (moral product): 5%-5.5%;

Defoamer (BYK141): 0.15%-0.2%;

Flow agent (BYK306): 0.15%-0.2%.

2. concrete production process of the present invention is:

(1) fusing:

With starting material 1. phthalic anhydride and 2. TriMethylolPropane(TMP) (TMP) add reactor, inflated with nitrogen, stirring is started in the fusing that heats up.

(2) esterification:

When temperature of reaction kettle rises to 114 ℃-124 ℃, add 3. lithium hydroxide of starting material; Continue to be warming up to when producing condensation water, close nitrogen; Again temperature is slowly risen to reaction end with appropriate time and carry out esterification for about 220 ℃, and keep about 2h.

(3) reflux:

4. the adding starting material reflux and use dimethylbenzene, reflux at 210 ℃-230 ℃ and keep about 2h.

(4) detect:

Mixed solution in the reactor is taken a sample, detect its acid number and viscosity.When acid number time cooling greater than 200s/25 ℃ less than 10mgKOH/g, viscosity.

(5) latting drown:

When temperature of reaction kettle is reduced to below 160 ℃, add starting material 5. N-BUTYL ACETATE, 6. pimelinketone and 7. ethylene glycol ether acetate (CAC), carry out latting drown.

(6) filter 1:

When temperature of reaction kettle is reduced to below 80 ℃, add starting material 8. Mierocrystalline cellulose (beautiful producing) and 9. aldehyde ketone resin (moral product), stir evenly laggard andante frame pressure filter filtration, pump into paint mixing tank.

(7) low speed disperses:

In paint mixing tank, add starting material 10. 1053 aluminium powders (moral product),

Defoamer (BYK141) and

Flow agent (BYK306) carries out low speed and disperses (400r/min) to stir evenly.

(8) filter 2:

Filter with 100 purpose tiffanys or woven wire, just obtain the finished product of the present invention.

Most preferred embodiment (product 5T of the present invention is an example with production):

1, starting material of selecting for use and weight percent thereof are:

1. phthalic anhydride: 530kg;

2. TriMethylolPropane(TMP) (TMP): 320kg;

3. lithium hydroxide: 0.4kg;

4. reflux and use dimethylbenzene: 30kg;

5. N-BUTYL ACETATE: 3200kg;

6. pimelinketone: 40kg;

7. ethylene glycol ether acetate (CAC): 10kg;

8. Mierocrystalline cellulose (beautiful produce): 750kg;

9. aldehyde ketone resin (moral product): 30kg;

10. 1053 aluminium powders (moral product): 420kg;

Defoamer (BYK141): 5kg;

Flow agent (BYK306): 5kg.

2, concrete production process is:

1. esterification temperature is 220 ℃, holds time about 2h;

2. reflux temperature is 220 ℃, holds time to about 2h.

Claims (2)

1. emulation coating of die-casting magnalium is characterized in that:

(1) its starting material and weight percent thereof are:

1. phthalic anhydride: 9.6%-11.6%;

2. TriMethylolPropane(TMP) (TMP): 5.5%-7.5%;

3. lithium hydroxide: 0.01%;

4. reflux and use dimethylbenzene: 0.5%-0.7%;

5. N-BUTYL ACETATE: 63%-65%;

6. pimelinketone: 0.6%-0.8%;

7. ethylene glycol ether acetate (CAC): 0.3%-0.4%;

8. beautiful Mierocrystalline cellulose: the 14%-16% that produces;

9. moral is produced aldehyde ketone resin: 0.5%-0.7%;

10. moral is produced 1053 aluminium powders: 5%-5.5%;

Defoamer BYK141:0.15%-0.2%;

Flow agent BYK306:0.15%-0.2%;

(2) each component concentration sum is 100%.

2. preparation method who produces the described emulation coating of die-casting magnalium of claim 1 is characterized in that its concrete production process is:

(1) fusing:

With starting material 1. phthalic anhydride and 2. TriMethylolPropane(TMP) (TMP) add reactor, inflated with nitrogen, stirring is started in the fusing that heats up;

(2) esterification:

When temperature of reaction kettle rises to 114 ℃-124 ℃, add 3. lithium hydroxide of starting material; Continue to be warming up to when producing condensation water, close nitrogen; Again temperature is slowly risen to reaction end with appropriate time and carry out esterification for about 220 ℃, and keep about 2h;

(3) reflux:

4. the adding starting material reflux and use dimethylbenzene, reflux at 210 ℃-230 ℃ and keep about 2h;

(4) detect:

Mixed solution in the reactor is taken a sample, detect its acid number and viscosity; When acid number time cooling greater than 200s/25 ℃ less than 10mgKOH/g, viscosity;

(5) latting drown:

When temperature of reaction kettle is reduced to below 160 ℃, add starting material 5. N-BUTYL ACETATE, 6. pimelinketone and 7. ethylene glycol ether acetate (CAC), carry out latting drown;

(6) filter 1:

When temperature of reaction kettle is reduced to below 80 ℃, add starting material 8. beautiful produce Mierocrystalline cellulose and 9. moral produce the aldehyde ketone resin, stir evenly laggard andante frame pressure filter filtration, pump into paint mixing tank;

(7) low speed disperses:

In paint mixing tank, add starting material 10. moral produce 1053 aluminium powders,

Defoamer BYK141 and

Flow agent BYK306 carries out low speed and disperses 400r/min to stir evenly;

(8) filter 2:

Filter with 100 purpose tiffanys or woven wire, just obtain the finished product of the present invention.

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