CN1036278C - Basic silicochromic lead rust-proof paint - Google Patents
Basic silicochromic lead rust-proof paint Download PDFInfo
- Publication number
- CN1036278C CN1036278C CN 92106642 CN92106642A CN1036278C CN 1036278 C CN1036278 C CN 1036278C CN 92106642 CN92106642 CN 92106642 CN 92106642 A CN92106642 A CN 92106642A CN 1036278 C CN1036278 C CN 1036278C
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- rust
- lead
- silicochromic
- paint
- proof paint
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Abstract
The present invention discloses basic lead silicochromate antirust paint which belongs to a composition which takes an organic compound as base material. The paint which has excellent antirust performance and excellent ply adhesion of polyurethane finishing paint is prepared by taking epoxy resin and isocyanate prepolymer liquid as the base material, taking basic lead silicochromate (BLSC) as main antirust pigment, and adding other auxiliary pigment, such as stuffing, an auxiliary agent and solvent. The antirust paint has an excellent antirust effect under marine environment with combined influence of water, steam, salt fog, sunlight, etc., and is completely suitable for antirust protection occasions, such as decks on ship, offshore oil drilling platforms, chemical industry pipelines, etc.
Description
The present invention relates to the rust-inhibiting paint of ferrous materials, especially a kind of basic silicochromic lead rust-proof paint.This lacquer is as priming paint, and good for the interlayer tack of polyurethane finish for the strong adhesion of steel, belonging to the organic compound is the combination paint vehicle of base-material.
The rust-inhibiting paint of often selling has in the market: with Synolac, or with chlorinated rubber, or with resol, or be the rust-inhibiting paint of base-material with castor oil soap etc.Though the widespread use of these rust-inhibiting paints can't adapt to the requirement of some special occasions: paint film adhesion requires strong, and the resistant to chemical media ability is eager to excel, and drying wants rapid weathering resistance to be eager to excel.On the ship deck that Here it is in the ocean environment of combined influences such as water, vapour, salt, mist, daylight, on the drilling unit, the first-class occasion of Hainan Airlines beacon.The antirust requirement of these occasions is high, all not competent this antirust demanding occasion of above-mentioned listed several rust-inhibiting paints.Base-material priming paint such as alkyd are relatively poor for the sticking power of ferrous materials, and work-ing life is shorter, and are special relatively poor for the ply adhesion of some polyurethane finishs, be full of cracks or obscission occur through regular meeting.Though contain antirust filler pigment in the above-mentioned rust-inhibiting paint, as red lead, red iron oxide, zinc yellow etc.Wherein the rust-proof effect of red iron oxide is relatively poor, and zinc yellow only plays chemical rust inhibition.Only have the rustless property of red lead better, but the contained lead oxides of red lead is up to 100%, Toxicity of Lead is big; And also big (9.1 gram per centimeters of the density of red lead
3).The rust-inhibiting paint that cooperates base-materials such as above-mentioned alkyd by red lead and make.This lacquer package stability is poor, very easily sinks to the bottom caking.The adaptability of the variation that the ground that this red lead paint causes physical environment expands with heat and contract with cold is also very poor, and the work-ing life of paint film is shorter.
Purpose of the present invention is exactly the defective that will overcome above-mentioned rust-inhibiting paint.Prepare a kind of rustless property excellence, have the physical chemistry antirust function concurrently, the physicals of paint film is good, shelf-stable, and toxicity is low, resistant to chemical media, the paint vehicle that weathering resistance is strong.This lacquer uses as priming paint, to adapt to vibration environment and can bear that metal expands with heat and contract with cold variation and not ftractureing do not come off, thereby reach the purpose of protection steel material surface.
Task of the present invention is that following technical scheme realizes: filter out a kind of basic silicochromic lead rust-proof paint.This lacquer is made up of mill base and prepolymer liquid, and is formulated by a certain percentage, and general existing the use now joined lacquer.Consisting of of mill base wherein:
The composition weight percent
Resins, epoxy 3-40
Basic lead chromate silicate (BLSC) 10-70
Laminal filler 0-40
Color stuffing 0-40
Coal tar pitch 0-20
Auxiliary agent 0-5
Solvent 10-50
With forming above-mentioned each component of mill base, drop into successively in the ball mill, ground 24 hours, promptly get mill base, package spare;
Wherein the preparation method of prepolymer liquid is by the compound of isocyanic ester and hydroxyl, carries out polyreaction by stoichiometric ratio: NCO/OH=1.4-2.5/1, thereby obtains isocyanate prepolymer liquid.This prepolymer liquid average per molecule contains 1.2 NCO bases at least;
Above-mentioned prepolymer liquid and mill base are joined lacquer in the scene in use.Join when lacquer, by the OH base of the Resins, epoxy in the mill base and the ratio of the NCO base of isocyanate prepolymer liquid: 1/0.8～2.7 joins lacquer.The lacquer consumption of joining of general this prepolymer liquid is: 3～40% of rust-inhibiting paint.Join the rust-inhibiting paint that forms of lacquer and have the rustless property excellence, the good physical performance of paint film, rapidly dry, shelf-stable is not stratified, and its toxicity is low, and resistant to chemical media erosive ability is strong.
The selected basic lead chromate silicate (BLSC) of the present invention has physics and chemical antirust dual-use function concurrently as the rust-stabilising pigment of the key character of this rust-inhibiting paint.This BLSC is a kind of mixture that is enclosed with lead silicate and basic lead chromate on the inertia silica core.The bag nuclear structure that this silica core encapsulation reaction produces plays decisive role for the rustless property of paint vehicle.Because in the bag of the BLSC nuclear tangerine structure, there is lead over half to be combined into nontoxic lead chromate and lead silicate, active lead in BLSC is suppressed like this, approximately only has 1/4th alkali formula plumbous oxide toxic, than the toxicity much less of the plumbous oxide of 100% in the red lead.Thereby just reduced the toxicity of this rust-inhibiting paint.Because the density of red lead is bigger, be generally 9.1 gram per centimeters simultaneously
3, and the density of BLSC only is 4 gram per centimeters
3, half of not enough red lead.As this antirust color stuffing, the relative red lead of BLSC just more is difficult for precipitated and separated, and its package stability is just high.
One of main base-material that the present invention is selected is a Resins, epoxy.This resin is the compound that contains hydroxyl (OH) in a kind of molecular structure, and its epoxy equivalent (weight) is between 100-8500.Being preferably the Resins, epoxy of bisphenol A-type as the Resins, epoxy of base-material, perhaps is the Resins, epoxy of phenol aldehyde type.These resins can singly select a kind of, and also optional several mixing are used.With the base-material of Resins, epoxy as this lacquer, purpose is: make the thermotolerance of paint film, non-corrosibility increases, particularly can improve more significantly paint film to the sticking power of base material and the sticking power between enamelled coating.Because Resins, epoxy can be compatible well with various color stuffings.The dispersion that this consistency helps color stuffing with mix, help the comprehensive synergy of each component.This coats with lacquer selected epoxy material can be solid-state epoxy material, E-20 for example, E-12, E-06, E-03; Can be liquid epoxy material also, as E-44, E-51 etc.Solid epoxy resin preferably is made into suitable solution earlier and makes mill base again.
The laminal filler that the present invention is selected as the auxiliary antirust filler of this lacquer can be: mica powder, glass flake, Graphite Powder 99, iron mica, aluminium powder etc.Certainly when only using BLSC, can satisfy the occasion of antirust requirement, also can be without these laminal fillers.Yet one or more that add these fillers will increase the physics rust-proof effect of this rust-inhibiting paint undoubtedly.This be because: these laminal fillers can be arranged in parallel within protected metallic surface well in paint film, play a part to intercept and shielding steam etc. infiltrated.
The coal tar pitch that the present invention is selected adds in the preparation mill base as auxiliary film forming matter.Because coal tar pitch is to belong to hydrophobic nature, can stop the wetting protected object of moisture surface, to improve rustless property.In addition, contain elements such as small amount of nitrogen, sulphur in the coal tar pitch, also have active dydrogen compounds, in the varnish formation process, nitrogen, but the polyreaction between sulphur and active hydrogen catalysis Resins, epoxy and the isocyanate prepolymer liquid are to quicken the solidification process of paint film.Just because of this katalysis, cooperate again the reaction of moisture in prepolymer liquid and the air from dryness, add the synergy of the various polarity group of epoxy compounds and prepolymer, these three kinds of effects play comprehensive synergistic effect to basic silicochromic lead rust-proof paint jointly, thereby it is make this rust-inhibiting paint have goodish sticking power and snappiness, and rapidly dry.
The auxiliary agent that the present invention selects for use is the processing of being apt to this rust-inhibiting paint in order to improve, storage or workability.Add a spot of auxiliary agent of the present invention and can reach this purpose.These auxiliary agents can be: anti-settling agent, as DA50; Can be: flow agent, as cellulose acetate butyrate, BYK-300; Can be: thixotropic agent, as vapor phase process SiO
2Can be anti-aging agent: as: 1010 anti-aging agent, 264 anti-aging agent etc.
The selected solvent of the present invention is the necessary composition branch of this rust-inhibiting paint.The purpose of allocating solvent into is for workabilities such as the process for processing performance of improving this rust-inhibiting paint and brushing, sprayings.These solvents can be: toluene, dimethylbenzene, No. 200 coal tar, hydro carbons such as heavy benzene; Can also be: acetone, methylethylketone, ketones such as pimelinketone; Can also be: vinyl acetic monomer, ester classes such as N-BUTYL ACETATE.Wherein can select for use one or more to mix uses.
Rust-inhibiting paint of the present invention also will prepare a kind of as the solidifying agent of rust-inhibiting paint of the present invention and the isocyanate prepolymer liquid of base-material before lacquer man's skill in advance.A this isocyanate prepolymer liquid important feature of the present invention just with dual function.This prepolymer liquid mainly is that carried out polyreaction by the compound of isocyanate ester compound and hydroxyl made.In this polyreaction, the chemical equivalent of isocyanic ester must generally react by its stoichiometric ratio: NCO/OH=1.4～2.5/1 greater than the chemical equivalent of oxy-compound.Wherein the optimum chemical equivalence ratio is: NCO/OH=1.7～2.1/1.Yet also mainly be by hydroxyl (OH) polymerization reaction take place in isocyanate group (NCO) in the prepolymer liquid and the Resins, epoxy in joining the lacquer process, form cross-linked structure.Because the introducing of this prepolymer has overcome the fragility of Resins, epoxy, thereby has improved the snappiness and the shock-resistance of paint film.Because each the component cooperative comprehensive effect in isocyanate prepolymer liquid and the mill base, make paint film layer can bear the influence with vibration deformation of expanding with heat and contract with cold of iron and steel, make the paint film that is attached to steel surface not produce be full of cracks, do not come off.
The present invention can select following material for use at the isocyanate ester compound of selecting preparation isocyanate prepolymer liquid for use: hexamethylene-diisocyanate (HMDI), tolylene diisocyanate (TDI), diphenylmethanediisocyanate (MDI), isophorone diisocyanate, phenylene diisocyanate, the naphthylene vulcabond, polyisocyanates (PAPI).Wherein can select for use a kind of or select for use several mixing to use it.
Hydroxyl (OH) compound of the preparation isocyanate prepolymer liquid that the present invention is selected can be: small molecule alcohol, as: propylene glycol, glycerol, trihydroxy methyl propane, hexylene glycol, 1,2,6-hexanetriol, butyleneglycol etc.Also can be macromole hydroxyl (OH) compound, as: Aethoxy Sklerol, polyesterols, vegetables oil, the polyhutadiene of hydroxyl, and the multipolymer of divinyl and other vinyl monomers.Wherein particularly Aethoxy Sklerol is applicable to this prepolymer liquid of preparation more.These compounds can be selected for use a kind of, or select for use several mixing to use it.
Rust-inhibiting paint of the present invention, owing to adopted basic lead chromate silicate, Resins, epoxy, isocyanate prepolymer and an amount of auxiliary agent and solvent act synergistically mutually, and it is all good to have obtained a kind of rust-proof effect and over-all properties, has the rust-inhibiting paint of physics and chemical rust inhibition concurrently.Because the cooperative comprehensive effect of each component, formed paint film is good antirust property not only, and anti-solvent, and resistant to chemical media can adapt to the ocean environment of vibration environment and climate variability.Paint film can sustain expanding with heat and contract with cold of metal, does not ftracture, and does not come off.This lacquer is specially adapted to the protection of steel surface.
Embodiments of the invention further specifically describe the feasibility and the reliability of this basic silicochromic lead rust-proof paint.Yet the present invention is not limited among the following embodiment.
Table 1 is: the formula for a product of four kinds of models of basic silicochromic lead rust-proof paint;
Table 1:
| HQ-1 prepolymer liquid | 33 | 29 | 34 | 34 |
The rust-inhibiting paint of above-mentioned four kinds of models after being coated with paint film and solidifying, records each performance such as following table 2.Table 2 is: four kinds of model rust-inhibiting paint test result statistics;
Annotate 1: in the table 1, HQ-1 prepolymer liquid is: by tolylene diisocyanate (TDI) and polypropylene glycol ether, and a kind of isocyanate prepolymer liquid that makes through polyreaction, it contains NCO base 6.1%.
Annotate 2: in the table 2, the salt-fog test data are the data after supporting with polyurethane finish, and paint film is made twice for the end, finish paint respectively are coated with.
Table 2:
| Alkali resistance (5%Na 2CO 3) | 90 days intact | 90 days intact | 90 days intact | 90 days intact |
| Sea water resistance | 90 days intact | 90 days intact | 90 days intact | 90 days intact |
| Anti-diesel oil | 90 days intact | 90 days intact | 90 days intact | 90 days intact |
| Acid resistance (5%H 2SO 4) | 22 days intact | 30 days intact | 30 days intact | 30 days intact |
| Weathering resistance: (outdoor tanning by the sun 1 year) | Do not chap and do not come off | Do not chap and do not come off | Do not chap and do not come off | Do not chap and do not come off |
| After joining lacquer, working life | 6 hours | 1 hour | ||
| High and low temperature circulation test: after paint film is done, at 120 ℃ after following 12 hours, at room temperature 12 hours recirculation again) | Do not chap after 10 circulations, do not come off |
*: the data unit of " shock resistance ", revise by the legal metering unit of new revision: the unit of " shock resistance " should be " cm ", and wherein " 50cm " is equivalent to original 4.9Nm.
Claims (11)
1, a kind of basic silicochromic lead rust-proof paint is characterized in that: this rust-inhibiting paint is made up of mill base and isocyanate prepolymer liquid, and the OH base of the Resins, epoxy in the mill base is 1/0.8-2.7 with the ratio of the NCO base of isocyanate prepolymer liquid, wherein consisting of of mill base:
The composition weight percent
Resins, epoxy 3-40
Basic lead chromate silicate 10-70
Laminal filler 0-40
Color stuffing 0-40
Coal tar pitch 0-20
Auxiliary agent 0-5
Hydro carbons, ketone, ester class
At least a 10-50 in the solvent
Wherein prepolymer liquid is the isocyanate prepolymer liquid that the compound by isocyanic ester and hydroxyl is polymerized by stoichiometric ratio: NCO/OH=1.4-2.5/1.
2, according to the described basic silicochromic lead rust-proof paint of claim 1, it is characterized in that: described basic lead chromate silicate carries out the silica core encapsulation reaction by inert silicon-dioxide and lead silicate and basic lead chromate and makes.
3, according to the described basic silicochromic lead rust-proof paint of claim 1, it is characterized in that: described Resins, epoxy is to contain hydroxyl in the molecule, and epoxy equivalent (weight) is at the epoxy compounds of 100-8500.
4, according to the described basic silicochromic lead rust-proof paint of claim 3, it is characterized in that: described Resins, epoxy is bisphenol A-type, or phenol aldehyde type, or its mixture, and these Resins, epoxy can be solid epoxy resins, also can be liquid-state epoxy resin.
5, according to the described basic silicochromic lead rust-proof paint of claim 1, it is characterized in that: described laminal filler is: mica powder, glass flake, Graphite Powder 99, iron mica, aluminium powder, wherein one or more.
6, according to the described basic silicochromic lead rust-proof paint of claim 1, it is characterized in that: described auxiliary agent is an anti-settling agent, flow agent, thixotropic agent, anti-aging agent.
7, according to the described basic silicochromic lead rust-proof paint of claim 1, it is characterized in that: described hydro carbons is: toluene, dimethylbenzene, No. 200 coal tar, heavy benzene; Described ketone is: acetone, methylethylketone, pimelinketone; Described ester class is: acetic acid second vinegar, N-BUTYL ACETATE; Wherein select one or more for use.
8, according to the described basic silicochromic lead rust-proof paint of claim 1, it is characterized in that: described isocyanic ester is selected from vulcabond or polyisocyanates, wherein selects one or more for use.
9, according to the described basic silicochromic lead rust-proof paint of claim 8, it is characterized in that: described vulcabond is: hexamethylene-diisocyanate, tolylene diisocyanate, diphenylmethanediisocyanate, isophorone diisocyanate, phenylene diisocyanate, naphthylene vulcabond.
10, according to the described basic silicochromic lead rust-proof paint of claim 1, it is characterized in that: described hydroxy-containing compounds is: small molecule alcohol or macromole oxy-compound.
11, according to the described basic silicochromic lead rust-proof paint of claim 10, it is characterized in that: described small molecule alcohol is: propylene glycol, glycerol, TriMethylolPropane(TMP), hexylene glycol, 1,2,6-hexanetriol; Described macromole oxy-compound is: Aethoxy Sklerol, polyesterols, vegetables oil, the polyhutadiene of hydroxyl, the polyhutadiene of hydroxyl and the multipolymer of other vinyl monomer; Wherein select one or more for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106642 CN1036278C (en) | 1992-07-23 | 1992-07-23 | Basic silicochromic lead rust-proof paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106642 CN1036278C (en) | 1992-07-23 | 1992-07-23 | Basic silicochromic lead rust-proof paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1070208A CN1070208A (en) | 1993-03-24 |
| CN1036278C true CN1036278C (en) | 1997-10-29 |
Family
ID=4942297
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106642 Expired - Fee Related CN1036278C (en) | 1992-07-23 | 1992-07-23 | Basic silicochromic lead rust-proof paint |
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| CN (1) | CN1036278C (en) |
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-
1992
- 1992-07-23 CN CN 92106642 patent/CN1036278C/en not_active Expired - Fee Related
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|---|---|
| CN1070208A (en) | 1993-03-24 |
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