CN103740160A - Shop primer curing agent - Google Patents
Shop primer curing agent Download PDFInfo
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- CN103740160A CN103740160A CN201310686462.9A CN201310686462A CN103740160A CN 103740160 A CN103740160 A CN 103740160A CN 201310686462 A CN201310686462 A CN 201310686462A CN 103740160 A CN103740160 A CN 103740160A
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Abstract
A disclosed shop primer curing agent is prepared by employing the following preparation method comprising the following steps: step 1, successively adding ethyl silicate and anhydrous ethanol into a reaction vessel, and stirring to obtain a mixed solution A; step 2, successively adding distilled water, 2 N hydrochloric acid and anhydrous ethanol into a liquid dropping pot of a liquid dropwise-adding device for pre-mixing, setting a flow controller in the liquid dropwise-adding device, and controlling the premixed solution in the dropwise-adding device to be uniformly added into the mixed solution A in the reaction vessel within 60-90 min; and step 3, after the step 2 is finished, successively adding heavy aromatics, anhydrous ethanol, 2-ethoxyethanol and ferric trichloride into the reaction vessel and stirring. Paint primer prepared from the curing agent prepared by employing the preparation method and a paint main agent has excellent adhesive strength, high-temperature resistance and weatherability, and a film formed by the primer is strong in stability and excellent in anti-corrosion property.
Description
Technical field
The invention belongs to technical field of coatings, especially relate to the solidifying agent that a kind of shop primer is used.
Background technology
Shop primer is the first paint of brushing after surface of steel plate is processed, and also can be called pre-treatment priming paint or maintenance priming paint, mainly for protection steel plate is subject to less atomospheric corrosion in the courses of processing such as welding, cutting, firer's correction.Shop primer is one of important kind of marine finish, and when China's shipbuilding and shipping-trade develop rapidly, the market of shop primer is very broad.Other also need the steel plate pre-treatment of machining large steel construction as bridge, oceanographic engineering etc. in addition, and they also have very large demand to shop primer.Successive dynasties product has zinc wash primer, epoxy zinc-rich paint, epoxy iron oxide red shop primer, inorganic primer for zinc silicate shop.Wherein inorganic zinc silicate primer is mainly to apply kind, mostly be that alcohol dissolubility is from consolidating type, generally formulated by coating host and solidifying agent, in host, mainly with zinc powder, be main rust-stabilising pigment, form zinc silicate, iron composite salt with solidifying agent hybrid reaction and close attachment in steel surface.After the effect of solidifying agent is oil paint coating, can continues hydrolytic polymerization and become caking agent, play bonding effect, what mostly adopt at present is the major ingredient of silicate hydrolyzate liquid as solidifying agent.Silicate hydrolyzate liquid is as filmogen, plays bonding effect, select suitable degree of hydrolysis after hydrolysate film forming good, just can there is excellent adhesion strength and high-temperature behavior.Therefore the selection of solidifying agent has great impact to the performance of shop primer.
At present, specification of quality for shop primer is: the approximately 20 μ left and right individual layer paint films that general requirement applies on steel plate, at its antirust ability in marine atmosphere or industrial atmosphere, at least should there be 3 months, there is good shock-resistant and toughness simultaneously, less and there is hypotoxicity in welding, cutting and firer's timing paint film heat-affected zone, especially should not produce too much harmful poison gas etc. during paint film decomposes.
But shop primer poor heat stability, the weathering resistance deficiency used at present, cause after coating film forming unstablely, affected greatly the antiseptic property of coating.Especially to oil carrier, in offshore oil platform, to the large-scale steel and iron member pre-treatment primary coat used time, the poor infringement to steel construction piece of antiseptic property of coating is larger.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of shop primer solidifying agent.Be specially:
A kind of shop primer solidifying agent, by the preparation method who comprises following reactions steps, made:
Step 1: tetraethyl silicate, two kinds of reaction solutions of dehydrated alcohol are added in reactor successively, stir to obtain mixed liquor A;
Step 2: distilled water, 2N hydrochloric acid, dehydrated alcohol are added successively in the dropping liquid tank of fluid drips feeder apparatus and carry out pre-mixing, set the flow director in fluid drips feeder apparatus, the aqueous premix of controlling in Dropping feeder is at the uniform velocity added in the mixed liquor A in reactor in 60-90min;
Step 3: step 2 adds successively heavy aromatics, dehydrated alcohol, ethylene glycol ethyl ether, iron trichloride after finishing in reactor, stirs.
In above-mentioned steps 2, be also included in the dropping liquid tank that distilled water, 2N hydrochloric acid, dehydrated alcohol adds fluid drips feeder apparatus successively after pre-mixing, start to be added dropwise to before reactor, when flow director coutroi velocity is set, set in advance the lower position that in dropping liquid tank, liquid level control sensor test liquid level declines simultaneously; After dropping starts, while dropping to default lower position along with the liquid level of aqueous premix, liquid level control sensor starts to send sound and light alarm, reminds operating personnel's step 2 to complete, and should enter rapidly next step.
In addition, the churning time of above-mentioned steps 1 and step 3 is controlled in 5-10min; Above-mentioned tetraethyl silicate silicon content is 40 ± 2%; That above-mentioned heavy aromatics is selected is the heavy aromatics p-4 that Tianjin Tong Xuan chemical company produces.
Silicate hydrolyzate liquid is as filmogen, play bonding effect, after only having the suitable degree of hydrolysis of selection, hydrolysate film forming is good, just can have excellent adhesion strength and high-temperature behavior, and in shop primer, the selection of solidifying agent is huge to the performance impact of shop primer.
Solidifying agent preparation principle is under catalyst action, to allow the product of tetraethyl silicate hydrolytic polymerization formation in advance macromolecular chain, then after mixing with coating host, forms macromolecular reticulated structure, i.e. paint film coating.In the preparation technology of solidifying agent of the present invention, tetraethyl silicate is polymerization adhesives, and dehydrated alcohol and Virahol are thinners, and iron trichloride and 2N hydrochloric acid are catalyzer, promotes hydrolysis and the polymerization of tetraethyl silicate, and distilled water is for hydrolysis and the polyreaction of tetraethyl silicate; Heavy aromatics p-4 is as the solvent of tetraethyl silicate.
In general solidifying agent preparation technology, be first hydrochloric acid, dehydrated alcohol, distilled water to be mixed and is added drop-wise in tetraethyl silicate, then add heavy aromatics, ethylene glycol ethyl ether, dehydrated alcohol, iron trichloride.The reaction of shop primer liquid is thermopositive reaction, and the control of reaction soln rate of addition is bad, can make reacted molecular size inhomogeneous, makes after coating film forming unstablely, affects antiseptic property.
In the present invention, step 1 first joins dehydrated alcohol in tetraethyl silicate, because also there is dehydrated alcohol tetraethyl silicate the inside, dropping solution in step 2 can be merged with mixed liquor A better, impel reaction to carry out smoothly, reacted molecular size is more uniform and stable.Therefore the rate of addition of controlling well is the key point of this technique, is also the key of controlling this product quality and stability.In the present invention, contriver gropes by long test, finds the rate of addition in step 2 or time to be controlled at evenly dropping in 60min-90min, can improve the rear bulk of molecule uniformity coefficient of solidifying agent reaction.
The base coat that the solidifying agent that use the inventive method is prepared and coating host make, it has excellent adhesion strength, high-temperature behavior and weathering resistance, and coating film forming rear stability is strong, antiseptic property excellence.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but can not serve as restriction of the present invention.
Embodiment 1:
A kind of shop primer solidifying agent, by following preparation method, made:
Step 1: tetraethyl silicate, two kinds of reaction solutions of dehydrated alcohol are added in reactor successively, stir 5min and obtain mixed liquor A;
Step 2: distilled water, 2N hydrochloric acid, dehydrated alcohol are added successively in the dropping liquid tank of fluid drips feeder apparatus and carry out pre-mixing, set the flow director in fluid drips feeder apparatus, the aqueous premix of controlling in Dropping feeder is at the uniform velocity added in the mixed liquor A in reactor in 60min; When setting flow director, set in advance the lower position that in dropping liquid tank, liquid level control sensor test liquid level declines; After dropping starts, while dropping to default lower position along with the liquid level of aqueous premix, liquid level control sensor starts to send sound and light alarm, reminds operating personnel's step 2 to complete, and should enter rapidly next step.
Step 3: step 2 adds successively heavy aromatics p-4, dehydrated alcohol, ethylene glycol ethyl ether, iron trichloride after finishing in reactor, stirs 10min.
In addition, above-mentioned tetraethyl silicate silicon content is 40 ± 2%.
Embodiment 2:
A kind of shop primer solidifying agent, by following preparation method, made:
Step 1: tetraethyl silicate, two kinds of reaction solutions of dehydrated alcohol are added in reactor successively, stir 10min and obtain mixed liquor A;
Step 2: distilled water, 2N hydrochloric acid, dehydrated alcohol are added successively in the dropping liquid tank of fluid drips feeder apparatus and carry out pre-mixing, set the flow director in fluid drips feeder apparatus, the aqueous premix of controlling in Dropping feeder is at the uniform velocity added in the mixed liquor A in reactor in 90min; When setting flow director, set in advance the lower position that in dropping liquid tank, liquid level control sensor test liquid level declines; After dropping starts, while dropping to default lower position along with the liquid level of aqueous premix, liquid level control sensor starts to send sound and light alarm, reminds operating personnel's step 2 to complete, and should enter rapidly next step.
Step 3: step 2 adds successively heavy aromatics p-4, dehydrated alcohol, ethylene glycol ethyl ether, iron trichloride after finishing in reactor, stirs 10min.
In addition, above-mentioned tetraethyl silicate silicon content is 40 ± 2%.
Experimental Comparison:
By above-described embodiment gained solidifying agent, with its composition of coating host A(be: acid polyethylene butyraldehyde liquid, white carbon black, wilkinite GBP-183, titanium dioxide NTR-606, compound ferrophosphorus powder, silica powder 350 orders, industrial alcohol, dimethylbenzene, zinc powder, anti-sagging agent 3300X) in 1:2 ratio, mix allotment and obtain embodiment 1 shop primer, embodiment 1 shop primer; Separately by general solidifying agent preparation method, make solidifying agent, in 1:2 ratio, mix allotment with above-mentioned coating host A and obtain common shop primer, to this in 3 shop primer carry out respective performances detection, it is actual that to detect data as follows:
By above-mentioned test data, can be seen and be adopted the shop primer prepared of the inventive method, surface drying time is fast, high in weathering resistance, and in salt fog resistance, the environment such as be exposed to the sun, paint film property is more excellent.
Treatment process of the present invention is described by specific embodiment.Those skilled in the art can use for reference the links such as content appropriate change raw material of the present invention, processing condition and realize corresponding other object, its relevant change does not all depart from content of the present invention, all similar replacements and change apparent to those skilled in the art, within being all deemed to be included in scope of the present invention.
Claims (5)
1. a shop primer solidifying agent, is characterized in that being made by the preparation method who comprises following reactions steps:
Step 1: tetraethyl silicate, two kinds of reaction solutions of dehydrated alcohol are added in reactor successively, stir to obtain mixed liquor A;
Step 2: distilled water, 2N hydrochloric acid, dehydrated alcohol are added successively in the dropping liquid tank of fluid drips feeder apparatus and carry out pre-mixing, set the flow director in fluid drips feeder apparatus, the aqueous premix of controlling in Dropping feeder is at the uniform velocity added in the mixed liquor A in reactor in 60-90min;
Step 3: step 2 adds successively heavy aromatics, dehydrated alcohol, ethylene glycol ethyl ether, iron trichloride after finishing in reactor, stirs.
2. preparation technology according to claim 1, it is characterized in that being also included in preparation process 2 in the dropping liquid tank that distilled water, 2N hydrochloric acid, dehydrated alcohol adds fluid drips feeder apparatus successively after pre-mixing, start to be added dropwise to before reactor, set in advance the lower position that in dropping liquid tank, liquid level control sensor test liquid level declines; After dropping starts, the liquid level of aqueous premix drops to default lower position, and liquid level control sensor starts to send sound and light alarm.
3. preparation technology according to claim 1, is characterized in that the churning time of step 1 and step 3 is controlled in 5-10min.
4. preparation technology according to claim 1, is characterized in that described tetraethyl silicate silicon content is 40 ± 2%.
5. according to the preparation technology described in claim 1-4 any one, it is characterized in that described heavy aromatics is heavy aromatics p-4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310686462.9A CN103740160B (en) | 2013-12-11 | 2013-12-11 | A kind of shop primer curing agent |
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| CN201310686462.9A CN103740160B (en) | 2013-12-11 | 2013-12-11 | A kind of shop primer curing agent |
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| CN103740160A true CN103740160A (en) | 2014-04-23 |
| CN103740160B CN103740160B (en) | 2016-05-18 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619195A (en) * | 2008-07-04 | 2010-01-06 | 上海暄洋化工材料科技有限公司 | High-temperature resistant workshop primer and preparation process thereof |
| CN102827535A (en) * | 2012-09-10 | 2012-12-19 | 北方涂料工业研究设计院 | Chromaking-free anti-corrosive coating and preparation method thereof |
| CN103087563A (en) * | 2012-11-27 | 2013-05-08 | 上海振华重工（集团）常州油漆有限公司 | Zinc silicate shop primer as well as preparation method and construction method thereof |
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2013
- 2013-12-11 CN CN201310686462.9A patent/CN103740160B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619195A (en) * | 2008-07-04 | 2010-01-06 | 上海暄洋化工材料科技有限公司 | High-temperature resistant workshop primer and preparation process thereof |
| CN102827535A (en) * | 2012-09-10 | 2012-12-19 | 北方涂料工业研究设计院 | Chromaking-free anti-corrosive coating and preparation method thereof |
| CN103087563A (en) * | 2012-11-27 | 2013-05-08 | 上海振华重工（集团）常州油漆有限公司 | Zinc silicate shop primer as well as preparation method and construction method thereof |
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| CN103740160B (en) | 2016-05-18 |
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