CN1472263A - Steel-structure anti-corrosion coating and preparing mehtod thereof - Google Patents
Steel-structure anti-corrosion coating and preparing mehtod thereof Download PDFInfo
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- CN1472263A CN1472263A CNA031167896A CN03116789A CN1472263A CN 1472263 A CN1472263 A CN 1472263A CN A031167896 A CNA031167896 A CN A031167896A CN 03116789 A CN03116789 A CN 03116789A CN 1472263 A CN1472263 A CN 1472263A
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Abstract
An anticorrosion paint for steel structure is prepared from the modified high-chlorinated polyethylene and alkyd resin or organic silicon modified acrylic resin, filler and assistant through respectively preparing priming paint and surface paint. Its advantages are high resistance to acid, alkali, salty fog, moisture and high temp. and low cost.
Description
Technical field
The present invention relates to a kind of anticorrosion of steel structure erosion coating.The invention further relates to the preparation method of this anticorrosion of steel structure erosion coating.
Background technology
The means of anticorrosion of steel structure erosion are a lot, as adopting electro-chemical protection, adding inhibiter, brushing anticorrosive coating etc.Wherein to adopt anticorrosive coating the most general.This mainly be because adopt that the use range of anticorrosion with coat erosion is wide, easy construction, cost be lower, and effect make us satisfied cause.
Anticorrosive coating is subjected to numerous scientific workers and technician's attention for many years as the main means of anticorrosion technique, and each state has all dropped into lot of manpower and material resources research.Developed countries such as Britain, the U.S., Germany and Japan still maintain the leading position at present.It is reported that Japan is annual to adopt the expense that anticorrosive coating consumed to reach 2,000,000,000,000 yen, accounts for about 65% of various anticorrosive measure total expensess.The status of anticorrosive coating in the development of the national economy has some idea of.
The kind of existing anticorrosion of steel structure erosion coating is a lot, as Resins, epoxy, asphalt modification Resins, epoxy, resol, Vinylite (polyvinyl chloride, chlorinatedpolyethylene, polyvinyl acetate (PVA) and their multipolymer etc.), chlorosulfonated polyethylene urethane, penton, furane resin, organic fluorine etc.These anticorrosive coatings are in various applications, and the protection of steel construction is played a positive role.
But often there is the single shortcoming of performance in above-mentioned anticorrosive coating, and for example some only has the acid-proof effect, and some only has the alkali prevention effect, has limited their Application Areas to a certain extent.
Summary of the invention
The objective of the invention is to prepare a kind of anticorrosive coating that has good acid-proof, alkali prevention and anti-salt fog simultaneously and preparation method thereof.
For solving the problems of the technologies described above, the present invention is performed such: coating of the present invention forms that to adopt modified high chlorinated polyethylene, organic silicon acrylic ester resin or Synolac be main film forming substance, and add pigment such as titanium dioxide, iron oxide red and auxiliary agents such as clorafin, zinc phosphate formulated.
Coating of the present invention is composed as follows: one. finish paint
Component concentration wt%
Modified high chlorinated polyethylene, 50% butylacetate/dimethylbenzene mixing solutions: 45～55
The organic silicon acrylic ester resin, 50% ethylene glycol monomethyl ether solution: 25～35
Clorafin: 0.1～0.5
Titanium dioxide: 15～25
Modified alta-mud anti-settling agent: 1～2 two. priming paint
Component concentration wt%
Modified high chlorinated polyethylene, 50% butylacetate/dimethylbenzene mixing solutions: 40～55
Synolac, 40% butylacetate solution: 15～20
Clorafin: 0.1～0.5
Ethylhexoate drier: 0.01～0.05
Iron oxide red: 10～15
Talcum powder: 15～20
Modified alta-mud anti-settling agent: 1～2
Zinc phosphate: 0.01～0.05
With above-mentioned finish paint and primer composition difference agitation grinding, promptly get product of the present invention.
Preparation technology of the present invention comprises following three steps: one. the graft modification of highly-chlorinated polyethylene, and concrete grammar is:
At first by following component concentration weighing:
Component concentration wt%
Highly-chlorinated polyethylene 25～35
Dibenzoyl peroxide 0.5～0.8
Reaction vessel vacuumized after airtight and logical nitrogen each 5 minutes, repetitive operation three times is fully to eliminate the air in the container.The above-mentioned raw materials that adds pre-metering.Be warming up to 100～140 ℃ of reactions 1～5 hour with stirring under the nitrogen protection, obtain heavy-gravity liquid.Be cooled to about 100 ℃, vacuumize and remove unreacted monomer, promptly get the modified high chlorinated polyethylene resin.Two. synthesizing of organic silicon acrylic ester resin, at first select following component:
Monomer is: octamethylcyclotetrasiloxane; The vinyl cyclotetrasiloxane; Methyl methacrylate; Butyl acrylate; Vinylformic acid.Initiator is: the tetramethyl-oxyammonia; Dibenzoyl peroxide.Solvent is N-BUTYL ACETATE and ethylene glycol monomethyl ether.Building-up process is carried out in two steps: synthetic silicone resin at first, by following component concentration weighing (initiator tetramethyl-oxyammonia and end-capping reagent trimethylchlorosilane are pressed monomer total amount % and are calculated):
Component concentration (wt%)
Octamethylcyclotetrasiloxane 85～90
Trimethylchlorosilane 0.01～0.05
Tetramethyl-oxyammonia 0.1～0.3
Reaction vessel vacuumized after airtight and logical nitrogen each 5 minutes, repetitive operation three times is fully to eliminate the air in the container.The octamethylcyclotetrasiloxane, vinyl cyclotetrasiloxane, trimethylchlorosilane and the tetramethyl-oxyammonia that add pre-metering are evacuated in the liquid till the no effusion bubble again.Be warming up to 150～180 ℃ of reactions 1～5 hour, obtain heavy-gravity liquid.Be cooled to about 100 ℃, vacuumize and remove unreacted monomer, promptly get silicone resin.
Be the synthetic of organic silicon acrylic ester then, by following component concentration weighing (initiator dibenzoyl peroxide and solvent are pressed monomer and silicone resin total amount % calculating):
Component concentration wt%
Silicone resin 20～30
Methyl methacrylate 33～40
Dibenzoyl peroxide 1～2
N-BUTYL ACETATE 40～60
Ethylene glycol monomethyl ether 40～60
Butyl acrylate, methyl methacrylate, vinylformic acid and dibenzoyl peroxide are mixed in proportion, standby.In the reaction vessel that agitator, condenser, thermometer and header tank are housed, add above-mentioned silicone resin, N-BUTYL ACETATE and ethylene glycol monomethyl ether, stirring and dissolving.Be warming up to 80～90 ℃, drip mix monomer, dripped off in about 1～2 hour.Be incubated 2～4 hours then, add N-BUTYL ACETATE and ethylene glycol monomethyl ether again, stir, reduce to the room temperature discharging.
The melt temperature of this organic silicon acrylic ester resin is 110～125 ℃ after measured, and has following chemical structure:
Wherein n=1～40, m=1～4, p=50～500, q=40～400.Three. the preparation of the preparation 1. protection against corrosion priming paint of anticorrosive coating
Adopting the modified high chlorinated polyethylene and the commercially available Synolac of above-mentioned preparation is filmogen, zinc phosphate is anticorrosion auxiliary agent, after the formulation for coating material weighing shown in above-mentioned, earlier the modified high chlorinated polyethylene resin is dissolved in the mixed solvent of ethyl acetate and dimethylbenzene, put together with Synolac, iron oxide red and other auxiliary agents then and mix 20～30 minutes, after sand mill grinds, promptly get protection against corrosion priming paint of the present invention again.2. the preparation of protection against corrosion finish paint
Adopt the modified high chlorinated polyethylene of above-mentioned preparation and voluntarily synthetic organic silicon acrylic ester resin be filmogen, titanium dioxide is a pigment, after the formulation for coating material weighing shown in above-mentioned, earlier HCPE is dissolved in the mixed solvent of ethyl acetate and dimethylbenzene, put together with organic silicon acrylic ester resin, titanium dioxide and other auxiliary agents then and mix 20～30 minutes, again protection against corrosion finish paint of the present invention after sand mill grinds.
Being ground to fineness after above-mentioned priming paint and the finish paint preparation is that 1.0～50 μ m get final product.
The present invention has following advantage:
1. because the filmogen of anticorrosive coating of the present invention is that highly-chlorinated polyethylene is carried out product and synthetic organic silicon acrylic ester resin voluntarily after the graft modification, the melt temperature of modified high chlorinated polyethylene is 120～140 ℃, the melt temperature that organic silicon acrylic ester is known is 110～125 ℃, has good solubility, film-forming properties.
2. anticorrosive coating itself of the present invention has Corrosion Protections such as good acid-proof, alkali prevention and anti-salt fog, has good flame retardant type simultaneously again.
3. preparation technology of the present invention is simple, with low cost, be widely used.
Description of drawings:
Fig. 1 is modified high chlorinated polyethylene prescription figure;
Fig. 2 is organic silicon acrylic ester resin formula figure;
Fig. 3 is anticorrosive coating and comparative example prescription figure;
Fig. 4 is the comparison diagram of anticorrosive coating performance of the present invention and comparative example.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is further described.
The preparation prescription of graft modification highly-chlorinated polyethylene is consulted Fig. 1.At first, press the proportioning weighing of modified high chlorinated polyethylene 1 among Fig. 1.Then reaction vessel is vacuumized after airtight and logical nitrogen each 5 minutes, repetitive operation three times is fully to eliminate the air in the container.The above-mentioned raw materials that adds pre-metering.Logical nitrogen protection is stirred down and is warming up to 110 ℃ of reactions 4 hours, obtains heavy-gravity liquid.Be cooled to about 100 ℃, vacuumize and remove unreacted monomer, promptly get the modified high chlorinated polyethylene resin.The initial melt temperature of product be 124 ℃, grafting weight gaining 16%.
Press the formulation modified high chlorinated polyethylene 2 of Fig. 1, be warming up to 130 ℃, reacted 2 hours, all the other preparation methods are with embodiment 1.The initial melt temperature of products therefrom is 135 ℃, grafting weight gaining 22%.
The preparation prescription of organic silicon acrylic ester resin is consulted Fig. 2.At first, press organic silicon acrylic ester resin 1 formulation of Fig. 2.Reaction vessel vacuumized after airtight and logical nitrogen each 5 minutes, repetitive operation three times is fully to eliminate the air in the container.The octamethylcyclotetrasiloxane, vinyl cyclotetrasiloxane, trimethylchlorosilane and the tetramethyl-oxyammonia that add pre-metering are evacuated in the liquid till the no effusion bubble again.Be warming up to 150 ℃ of reactions 4 hours, obtain heavy-gravity liquid.Be cooled to about 100 ℃, vacuumize and remove unreacted monomer, promptly get silicone resin.
Butyl acrylate, methyl methacrylate, vinylformic acid and dibenzoyl peroxide are mixed in proportion, standby.In the reaction vessel that agitator, condenser, thermometer and header tank are housed, add above-mentioned silicone resin, 30% N-BUTYL ACETATE and 20% ethylene glycol monomethyl ether, stirring and dissolving.Be warming up to 85 ℃, drip mix monomer, dripped off in about 1 hour.Be incubated 2 hours then, add 30% N-BUTYL ACETATE and 20% ethylene glycol monomethyl ether again, stir, reduce to the room temperature discharging.The initial melt temperature of products therefrom is 120 ℃.
Embodiment 4
Press the formulation organic silicon acrylic ester resin 2 of table 2, be warming up to 90 ℃, drip mix monomer, added in about 2 hours, be incubated 4 hours, all the other preparation methods are identical with embodiment 3.The initial melt temperature of products therefrom is 111 ℃.
Embodiment 5
See also 4 anticorrosive coating prescriptions of the present invention that Fig. 3 exemplifies.At first, press and fill a prescription 1 among Fig. 3 earlier with in highly-chlorinated polyethylene solution and the Synolac adding agitation vat, other components under stirring in the adding prescription 1 after stirring, are gone into sand mill grinding twice, fineness are reached below the 50 μ m, the discharging barrelling.Obtain priming paint of the present invention.
Press among Fig. 3 prescription 2 highly-chlorinated polyethylene solution and organic silicon acrylic ester resin are added in the agitation vat, stir other components that add down in the prescription 2, after stirring, drop into sand mill and grind twice, fineness is reached below the 50 μ m, the discharging barrelling.The performance of gained anticorrosive coating of the present invention sees Table 4 prescription 2 (product with embodiment 5 is a priming paint).
Embodiment 7
By filling a prescription 3 among Fig. 3, adopt embodiment 5 same methods to prepare anticorrosive coating.The performance of gained coating is seen the prescription 3 (product with embodiment 5 is a priming paint) of Fig. 4.
Embodiment 8
By filling a prescription 4 among Fig. 3, adopt embodiment 5 same methods to prepare anticorrosive coating.The performance of gained coating is seen the prescription 4 (product with embodiment 5 is a priming paint) of Fig. 4.
The present invention is owing to the organic silicon acrylic ester resin that has adopted modified high chlorinated polyethylene and preparation voluntarily is a film coalescence aid, film-forming properties, the sticking power of coating improve greatly, cause the Corrosion Protection of coating to be mentioned, simultaneously with low cost, preparation technology is simple, can be widely used in the protection against corrosion of various steel construction.Comparative example
Press and fill a prescription 5 among Fig. 3 earlier with in common highly-chlorinated polyethylene solution and the common acrylate resin adding agitation vat, other components under stirring in the adding prescription 5 after stirring, are gone into sand mill grinding twice, fineness are reached below the 50 μ m, the discharging barrelling.The performance of gained anticorrosive coating of the present invention is seen the prescription 5 (product with embodiment 5 is a priming paint) of Fig. 4.
Claims (3)
1. an anticorrosion of steel structure erosion coating is made up of finish paint and priming paint, and it is characterized in that: by the priming paint that modified high chlorinated polyethylene, Synolac and other component are formed, it is as follows specifically to form proportioning:
Component concentration wt%
Modified high chlorinated polyethylene, 50% butylacetate/dimethylbenzene mixing solutions: 45～55
Synolac, 40% butylacetate solution: 15～20
Clorafin: 0.1～0.5
Ethylhexoate drier: 0.01～0.05
Iron oxide red: 10～15
Talcum powder: 15～20
Modified alta-mud anti-settling agent: 1～2
Zinc phosphate: 0.01～0.05
By modified high chlorinated polyethylene, organic silicon acrylic ester resin, and the finish paint of other component composition, it is as follows specifically to form proportioning:
Component concentration wt%
Modified high chlorinated polyethylene, 50% butylacetate/dimethylbenzene mixing solutions: 40～55
The organic silicon acrylic ester resin, 50% ethylene glycol monomethyl ether solution: 25～35
Clorafin: 0.1～0.5
Titanium dioxide: 15～25
Modified alta-mud anti-settling agent: 1～2
2. the preparation method of anticorrosion of steel structure erosion coating according to claim 1 is characterized in that: preparation divides following three steps:
(1) preparation of modified high chlorinated polyethylene, its preparation process is: at first by following component concentration weighing:
Component concentration wt%
Highly-chlorinated polyethylene 25～35
Butyl acrylate 10～15
Methyl methacrylate 10～15
Dibenzoyl peroxide 0.5～0.8
Butylacetate 20～30
Dimethylbenzene 20～30
Reaction vessel is fully eliminated air, add the above-mentioned raw materials of pre-metering, logical nitrogen protection is stirred down and is warming up to 100～140 ℃ of reactions 1～5 hour, obtains heavy-gravity liquid, and unreacted monomer is removed in cooling, promptly gets the modified high chlorinated polyethylene resin;
(2) preparation of organic silicon acrylic ester resin, its preparation process in two steps, synthetic silicone resin at first, by following component concentration weighing, initiator and end-capping reagent trimethylchlorosilane are pressed monomer total amount % and are calculated:
Component concentration wt%
Octamethylcyclotetrasiloxane 85～90
Vinyl cyclotetrasiloxane 10～15
Trimethylchlorosilane 0.01～0.05
Tetramethyl-oxyammonia 0.1～0.3
Reaction vessel is fully eliminated air, add the reactant of above-mentioned metering, be evacuated to no effusion bubble in the liquid again, be warming up to 150～180 ℃ of reactions 1～5 hour, obtain heavy-gravity liquid, unreacted monomer is removed in cooling, promptly gets silicone resin;
Be the synthetic of organic silicon acrylic ester then, by following component concentration weighing, monomer pressed by initiator and solvent and silicone resin total amount % calculates:
Component concentration wt%
Silicone resin 20～30
Methyl methacrylate 33～40
Butyl acrylate 35～45
Vinylformic acid 2～4
Dibenzoyl peroxide 1～2
N-BUTYL ACETATE 40～60
Ethylene glycol monomethyl ether 40～60
Butyl acrylate, methyl methacrylate, vinylformic acid and dibenzoyl peroxide are mixed in proportion, in reaction vessel, add above-mentioned silicone resin, N-BUTYL ACETATE and ethylene glycol monomethyl ether, stirring and dissolving, be warming up to 80～90 ℃, drip mix monomer, drip off back insulation 2～4 hours, add N-BUTYL ACETATE and ethylene glycol monomethyl ether again, stir, reduce to the room temperature discharging;
(3) preparation of anticorrosive coating: at first good by aforesaid right requirement 1 described anticorrosion base coat and the weighing of finish paint component concentration difference, mixed then 20～30 minutes, grind through sand mill, fineness is reached below the 50 μ m, promptly get finished product of the present invention.
3. the preparation method of anticorrosion of steel structure erosion coating according to claim 2, it is characterized in that: anticorrosive coating is ground to fineness 1.0～50 μ m.
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