CN103725079A - Preparation process of workshop primer curing agent - Google Patents
Preparation process of workshop primer curing agent Download PDFInfo
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- CN103725079A CN103725079A CN201310686463.3A CN201310686463A CN103725079A CN 103725079 A CN103725079 A CN 103725079A CN 201310686463 A CN201310686463 A CN 201310686463A CN 103725079 A CN103725079 A CN 103725079A
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Abstract
The invention discloses a preparation process of a workshop primer curing agent, which comprises the following reaction steps: step 1: sequentially adding two types of reaction liquid of ethyl silicate and absolute ethyl alcohol into a reaction kettle and stirring to obtain mixed liquid A; step 2: premixing distilled water, 2N hydrochloric acid and absolute ethyl alcohol, uniformly mixing, and slowly dropwise adding the mixture into the mixed liquid A in the reaction kettle; step 3: sequentially adding heavy aromatics, absolute ethyl alcohol, glycol ether and ferric trichloride into the reaction kettle after the step 2 is finished and stirring. A paint primer prepared from the curing agent prepared by using the method disclosed by the invention and a paint main agent has excellent adhesion strength, high-temperature performance and weather resistance; paint has high stability and excellent corrosion resistance after forming a film.
Description
Technical field
The invention belongs to coating technology, the preparation technology of solidifying agent for especially a kind of shop primer.
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 that silicate hydrolyzate liquid is as the major ingredient of 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 the shop primer poor heat stability of using at present, weathering resistance is not enough, 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 preparation technology of shop primer solidifying agent, greatly improved success ratio and the efficiency of solidifying agent preparation feedback.
A preparation technology for shop primer solidifying agent, 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 carried out to pre-mixing, mix in the rear mixed liquor A being slowly added dropwise in reactor, the time of dropping should be controlled in 60min-90min and be added dropwise in the interior mixed solution of reactor.
Step 3: step 2 adds successively heavy aromatics, dehydrated alcohol, ethylene glycol ethyl ether, iron trichloride after finishing in reactor, stirs.
Further, 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%, and heavy aromatics is heavy aromatics p-4.
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 the solvent as tetraethyl silicate, for being Tianjin Tong Xuan chemical company production product.
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 it is bad that reaction soln rate of addition is controlled, and 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.Meanwhile, the reaction of solidifying agent is thermopositive reaction, and the rate of addition of therefore 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, while finding the rate of addition in step 2 or time to be controlled at 60min-90min, can improve bulk of molecule uniformity coefficient after 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, and antiseptic property is excellent.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but can not be as restriction of the present invention.
Embodiment 1:
A preparation technology for shop primer solidifying agent, comprises following reactions steps:
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 carried out to pre-mixing, mix in the rear mixed liquor A being slowly added dropwise in reactor, the time of dropping should be controlled in 60min and be added dropwise in the interior mixed solution of reactor.
Step 3: step 2 adds successively heavy aromatics p-4, dehydrated alcohol, ethylene glycol ethyl ether, iron trichloride after finishing in reactor, stirs 10min.
Above-mentioned steps mesosilicic acid ethyl ester silicon content is 40 ± 2%.
Embodiment 2:
A preparation technology for shop primer solidifying agent, comprises following reactions steps:
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 carried out to pre-mixing, mix in the rear mixed liquor A being slowly added dropwise in reactor, the time of dropping should be controlled in 90min and be added dropwise in the interior mixed solution of reactor.
Step 3: step 2 adds successively heavy aromatics p-4, dehydrated alcohol, ethylene glycol ethyl ether, iron trichloride after finishing in reactor, stirs 10min.
Above-mentioned steps mesosilicic acid ethyl ester 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 see the shop primer that adopts the inventive method to prepare, sticking power is stronger, surface drying time is faster, 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 preparation technology for shop primer solidifying agent, is characterized in that comprising 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 carried out to pre-mixing, mix in the rear mixed liquor A being slowly added dropwise in reactor;
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, is characterized in that after in preparation process 2, distilled water, 2N hydrochloric acid, dehydrated alcohol mix, and is added dropwise in reactor in mixed solution in 60min-90min.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310686463.3A CN103725079A (en) | 2013-12-11 | 2013-12-11 | Preparation process of workshop primer curing agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310686463.3A CN103725079A (en) | 2013-12-11 | 2013-12-11 | Preparation process of workshop primer curing agent |
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| CN103725079A true CN103725079A (en) | 2014-04-16 |
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| CN201310686463.3A Pending CN103725079A (en) | 2013-12-11 | 2013-12-11 | Preparation process of workshop primer curing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108003696A (en) * | 2017-12-22 | 2018-05-08 | 枞阳县三金颜料有限责任公司 | A kind of epoxide resin paint solidifying agent |
| CN109370342A (en) * | 2018-09-18 | 2019-02-22 | 周连惠 | A kind of water nano imitation porcelain coating and preparation method thereof |
-
2013
- 2013-12-11 CN CN201310686463.3A patent/CN103725079A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108003696A (en) * | 2017-12-22 | 2018-05-08 | 枞阳县三金颜料有限责任公司 | A kind of epoxide resin paint solidifying agent |
| CN109370342A (en) * | 2018-09-18 | 2019-02-22 | 周连惠 | A kind of water nano imitation porcelain coating and preparation method thereof |
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| PB01 | Publication | ||
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Application publication date: 20140416 |