CN104399868A - Flake graphite alcohol-based casting paint and manufacturing method thereof - Google Patents

Abstract

The invention discloses a flake graphite alcohol-based casting paint and a manufacturing method thereof. The paint is characterized by being composed of the following raw materials in parts by weight: 68 to 82 parts of flake graphite, 0.7 to 1.4 parts of glutamic acid, 2 to 3 parts of clay, 1.2 to 3.1 parts of sodium hydroxymethyl cellulose, 2.2 to 3.5 parts of dodecyl trimethyl ammonium chloride, 3 to 5 parts of methyl methacrylate, 9 to 13 parts of rick husk carbon, 18 to 25 parts of grapevine, 2 to 4 parts of lithium-based bentonite, 3 to 5 parts of rosin, 53 to 69 parts of ethanol, and 3 to 6 parts of auxiliary agent. The modified grapevine powder is taken as the suspending agent, is suspended in ethanol and will not form deposition even after long-time preservation, and the production cost is reduced at the same time. The prepared paint has a very good gas-storage and gas-discharge performance, and can prevent the defects on casting members such as pores, pin holes, recesses, and the like.

Description

A kind of crystalline flake graphite alcohol-base foundry coating and preparation method thereof

Technical field

The present invention relates to cast paint field, be specifically related to a kind of crystalline flake graphite alcohol-base foundry coating and preparation method thereof.

Background technology

Cast paint refers to for being coated in die cavity or core surface, to change the casting auxiliary material of the performances such as its surperficial refractoriness, chemical stability, anti-metal erosion, anti-stick grittiness, the disperse system that it is made up of the material of multiple different in kind, its composition mainly comprises the compositions such as refractory material, suspending agent, carrier, binding agent and special additive.Require that coating has good processing performance, service behaviour, quality stability and applies reappearance when acting on foundry goods, can play heat insulation on the one hand, equalization temperature, exempt the object of the impingment corrosion of molten metal, the defect such as cracking, sand holes, white iron formation that can prevent cast product from causing because Local cooling is too fast on the other hand.Cast paint is of a great variety, substantially can be divided into two classes: water based paint and alcohol-base paint.Wherein alcohol-base paint is both curable through lighting after application, does not need to dry, and can shorten the production cycle, Simplified flowsheet, reduces drying plant investment, is be cast a kind of quick drying paint that boundary widely uses, has been widely used in the production of steel, iron, coloured foundry goods.

But alcohol-base foundry coating has many defects in prior art, such as: suspension stability is poor, in long-distance transport and deposit easy layering in process, resistance to elevated temperatures is poor, hardness is low, low, the anti-stick grittiness of poor chemical stability, anti-metal performance of flushing is weak, make alcohol-base foundry coating function singleness, cannot large-scale industrial production be met.

Summary of the invention

Object of the present invention is just to provide a kind of crystalline flake graphite alcohol-base foundry coating and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

A kind of crystalline flake graphite alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: crystalline flake graphite 68-82, glutamic acid 0.7-1.4, clay 2-3, sodium cellulose glycolate 1.2-3.1, DTAC 2.2-3.5, methyl methacrylate 3-5, rice hull carbon 9-13, grapevine 18-25, lithium bentonite 2-4, rosin 3-5, ethanol 153-169, auxiliary agent 3-6.

Described auxiliary agent is made up of following raw materials in part by weight: shrimp shell 8-13, pearl mica 75-85, hydrotalcite 55-70, sodium phosphate trimer 0.1-0.4, organobentonite 1-2, thymol 0.2-0.4, dimethicone 2-4, 1-Methoxy-2-propyl acetate 0.3-0.6, nano silicon 0.8-2.1, brown iron oxide 3-6, polyethylene glycol oxide 2.3-3.1, brown sugar 1.2-3.5, suitable quantity of water, its preparation method is: by shrimp shell, pearl mica, hydrotalcite is put into calcining furnace and calcine 2-3 hour at 540-670 DEG C, take out, the hydrochloric acid solution putting into 8-12% soaks 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, be added to the water, simultaneously, add polyethylene glycol oxide, brown iron oxide grinds, spraying dry obtains xeraphium, organobentonite, sodium phosphate trimer are joined 1-Methoxy-2-propyl acetate high speed and stir 10-20 minute, adds dimethicone, nano silicon high-speed stirred 20-30 minute successively, until fineness reaches the organobentonite that less than 50 μm obtain modification, xeraphium, organic modified bentonite, thymol, brown sugar are added suitable quantity of water grinding granulation, dries and get final product.

The preparation method of described a kind of crystalline flake graphite alcohol-base foundry coating, is characterized in that comprising the following steps:

(1) put into retort calcination processing 3-4 hour at 430-540 DEG C after being dried by grapevine, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filters and takes out, use clear water cyclic washing, dries and pulverizes, the grapevine powder of obtained modification;

(2) modification grapevine powder above-mentioned steps obtained stirs pulping and is heated to 140-160 DEG C together with the ethanol of rice hull carbon, 1/4 weight, adding methyl methacrylate keeps temperature to stir 1-2 hour, be cooled to 50-60 DEG C and add DTAC grinding 30-40 minute, spraying dry obtains xeraphium;

(3) ethanol of lithium bentonite, clay, 1/5 weight is uniformly mixed, leaves standstill 10-12 hour, then add sodium cellulose glycolate, rosin heating stirs 30-40 minute to 70-80 DEG C;

(4) crystalline flake graphite is pulverized in input reactor, add the ethanol agitation grinding 10-15 minute of glutamic acid and surplus, add step (2), (3) product, auxiliary agent again, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grinding is until fineness reaches less than 50 μm.

The present invention has following beneficial effect: the advantages such as cast paint of the present invention is high temperature resistant, associativity good, wearability is good, suspendability is excellent; Make suspending agent with the grapevine powder of modification, when being suspended in ethanol, long period placement can not be formed in " silent as the grave shallow lake ", and reduces production cost; The present invention adds coating that corresponding additive obtains to be had and good stores gas and exhaust capacity, and foundry goods can be avoided to occur the defects such as pore, pin hole, depression.

Detailed description of the invention

Described a kind of crystalline flake graphite alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: crystalline flake graphite 68, glutamic acid 0.7, clay 2, sodium cellulose glycolate 1.2, DTAC 2.2, methyl methacrylate 5, rice hull carbon 9, grapevine 18, lithium bentonite 2, rosin 3, ethanol 156, auxiliary agent 3.

Described auxiliary agent is made up of following raw materials in part by weight: shrimp shell 11, pearl mica 78, hydrotalcite 57, sodium phosphate trimer 0.14, organobentonite 1, thymol 0.2, dimethicone 2, 1-Methoxy-2-propyl acetate 0.3, nano silicon 1.1, brown iron oxide 3, polyethylene glycol oxide 2.3, brown sugar 1.5, suitable quantity of water, its preparation method is: by shrimp shell, pearl mica, hydrotalcite is put into calcining furnace and calcine 2-3 hour at 540-670 DEG C, take out, the hydrochloric acid solution putting into 8-12% soaks 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, be added to the water, simultaneously, add polyethylene glycol oxide, brown iron oxide grinds, spraying dry obtains xeraphium, organobentonite, sodium phosphate trimer are joined 1-Methoxy-2-propyl acetate high speed and stir 10-20 minute, adds dimethicone, nano silicon high-speed stirred 20-30 minute successively, until fineness reaches the organobentonite that less than 50 μm obtain modification, xeraphium, organic modified bentonite, thymol, brown sugar are added suitable quantity of water grinding granulation, dries and get final product.

Preparation method comprises the following steps:

(1) put into retort calcination processing 3-4 hour at 430-540 DEG C after being dried by grapevine, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filters and takes out, use clear water cyclic washing, dries and pulverizes, the grapevine powder of obtained modification;

(2) modification grapevine powder above-mentioned steps obtained stirs pulping and is heated to 140-160 DEG C together with the ethanol of rice hull carbon, 1/4 weight, adding methyl methacrylate keeps temperature to stir 1-2 hour, be cooled to 50-60 DEG C and add DTAC grinding 30-40 minute, spraying dry obtains xeraphium;

(3) ethanol of lithium bentonite, clay, 1/5 weight is uniformly mixed, leaves standstill 10-12 hour, then add sodium cellulose glycolate, rosin heating stirs 30-40 minute to 70-80 DEG C;

(4) crystalline flake graphite is pulverized in input reactor, add the ethanol agitation grinding 10-15 minute of glutamic acid and surplus, add step (2), (3) product, auxiliary agent again, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grinding is until fineness reaches less than 50 μm.

The technical indicator of being processed the cast paint obtained by above-described embodiment is as follows:

(1) solid content: suitably;

(2) coating abrasion performance: 0.46;

(3) gas forming amount: 12 mL/g;

(4) 24 hours coating suspension rates are placed: 98.2%;

(5) normal temperature strength of coating: 790g/mm.

Claims (2)

1. a crystalline flake graphite alcohol-base foundry coating, it is characterized in that, be made up of the raw material of following weight portion: crystalline flake graphite 68-82, glutamic acid 0.7-1.4, clay 2-3, sodium cellulose glycolate 1.2-3.1, DTAC 2.2-3.5, methyl methacrylate 3-5, rice hull carbon 9-13, grapevine 18-25, lithium bentonite 2-4, rosin 3-5, ethanol 153-169, auxiliary agent 3-6, described auxiliary agent is made up of following raw materials in part by weight: shrimp shell 8-13, pearl mica 75-85, hydrotalcite 55-70, sodium phosphate trimer 0.1-0.4, organobentonite 1-2, thymol 0.2-0.4, dimethicone 2-4, 1-Methoxy-2-propyl acetate 0.3-0.6, nano silicon 0.8-2.1, brown iron oxide 3-6, polyethylene glycol oxide 2.3-3.1, brown sugar 1.2-3.5, suitable quantity of water, its preparation method is: by shrimp shell, pearl mica, hydrotalcite is put into calcining furnace and calcine 2-3 hour at 540-670 DEG C, take out, the hydrochloric acid solution putting into 8-12% soaks 4-5 hour, filter and take out, use clear water cyclic washing, dry and pulverize, be added to the water, simultaneously, add polyethylene glycol oxide, brown iron oxide grinds, spraying dry obtains xeraphium, organobentonite, sodium phosphate trimer are joined 1-Methoxy-2-propyl acetate high speed and stir 10-20 minute, adds dimethicone, nano silicon high-speed stirred 20-30 minute successively, until fineness reaches the organobentonite that less than 50 μm obtain modification, xeraphium, organic modified bentonite, thymol, brown sugar are added suitable quantity of water grinding granulation, dries and get final product.

2. the preparation method of a kind of crystalline flake graphite alcohol-base foundry coating according to claim 1, is characterized in that comprising the following steps:

(1) put into retort calcination processing 3-4 hour at 430-540 DEG C after being dried by grapevine, take out, the hydrochloric acid solution putting into 10-12% soaks 3-6 hour, filters and takes out, use clear water cyclic washing, dries and pulverizes, the grapevine powder of obtained modification;

(2) modification grapevine powder above-mentioned steps obtained stirs pulping and is heated to 140-160 DEG C together with the ethanol of rice hull carbon, 1/4 weight, adding methyl methacrylate keeps temperature to stir 1-2 hour, be cooled to 50-60 DEG C and add DTAC grinding 30-40 minute, spraying dry obtains xeraphium;

(3) ethanol of lithium bentonite, clay, 1/5 weight is uniformly mixed, leaves standstill 10-12 hour, then add sodium cellulose glycolate, rosin heating stirs 30-40 minute to 70-80 DEG C;

(4) crystalline flake graphite is pulverized in input reactor, add the ethanol agitation grinding 10-15 minute of glutamic acid and surplus, add step (2), (3) product, auxiliary agent again, temperature of reaction kettle is slowly risen to 75-85 DEG C simultaneously, keep temperature to stir 20-40 minute, grinding is until fineness reaches less than 50 μm.