CN103409037A - Solvent type double-composition epoxy coating material quick to solidify at low temperature and preparation method thereof - Google Patents
Solvent type double-composition epoxy coating material quick to solidify at low temperature and preparation method thereof Download PDFInfo
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- CN103409037A CN103409037A CN2013103388565A CN201310338856A CN103409037A CN 103409037 A CN103409037 A CN 103409037A CN 2013103388565 A CN2013103388565 A CN 2013103388565A CN 201310338856 A CN201310338856 A CN 201310338856A CN 103409037 A CN103409037 A CN 103409037A
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Abstract
The invention relates to the technical field of functional coating material preparation, and provides solvent type double-composition epoxy coating material quick to solidify at a low temperature and a preparation method thereof. The solvent type double-composition epoxy coating material has marvelous anticorrosion performance equivalent to that of common epoxy prime paint, low-temperature rapid drying performance of polyurethane prime paint, strong adhesive force, and excellent impact resistance, and is tough and abrasion resistant. Main paint of the epoxy coating material comprises the following compositions: epoxy resin, a diluent, an auxiliary agent, rust proof pigments, pigments, filling materials and a thixotropic agent; a curing agent of the epoxy coating material comprises the following compositions: amine resin, a diluent and an auxiliary agent. The preparation method comprises the following steps: (1), the preparation of the main paint, sequentially adding the epoxy resin, the diluent and the auxiliary agent into a vat , stirring, further adding the rust proof pigments, the pigments, the filling materials and the thixotropic agent, uniformly dispersing, grinding, and then filtering; (2), the preparation of the curing agent, sequentially adding the amine resin, the diluent and the auxiliary agent into a vat, dispersing at a low speed, and then filtering; (3), mixing the main paint with the curing agent by adopting spraying equipment to form a coating layer.
Description
Technical field
The present invention relates to the functional paint preparing technical field, particularly a kind of solvent-borne type low temperature fast-setting two-component epoxy coating and preparation method thereof.
Background technology
In recent years, along with the fast development of Mechanical Industry of China, production capacity enlarges, and construction rhythm is accelerated and coating equipment is relatively lagged behind, and particularly aspect the roasting plant input, is more lagging behind; Yet the requirement for anticorrosion to product proposes again higher requirement.At present, the general aseptic base coat adopted at machinery industry mainly contains single-component epoxy ester priming paint, two component epoxy amine cured body priming paint, double-component polyurethane primer, amino base paint and these several classes of electrophoretic primer.Epoxy amine cured body priming paint is shown one's talent with advantages such as its excellent antiseptic property, strong adhesion, less energy-consumption.And shortcoming is (below 10 ℃) rate of drying more not even reaction when temperature is low in the winter time, while under there is no baking condition, constructing, will have a strong impact on job schedule.For obtaining excellent corrosion protection coating and constructing in the winter time, meet construction requirement without under baking condition, developing a kind of solvent-borne type low temperature fast-setting two-component epoxy coating becomes the machinery industry exigence.In winter construction, solvent-borne type low temperature fast-setting two-component epoxy coating will replace conventional solvent type epoxy coating and polyurethane anticorrosion primer kind.Solvent-borne type low temperature fast-setting two-component epoxy coating has the antiseptic property excellence, and all there is obvious advantage the aspects such as low temperature fast setting, wear resistance, physical strength.With traditional solvent type epoxy priming paint, compare, has the quick-setting advantage of low temperature, with polyurethane primer, compare and have excellent antiseptic property, its system is integrated, and the high preservative property of epoxy systems and the low temperature fast setting performance of polyurethane primer are given all over the body, are with a wide range of applications.
Current domestic machinery is with minutes two kinds usually of protective systems, and a kind of single-component anti-corrosion primer because of its poor-performing or energy consumption is too high, is not therefore made comparisons in this project; Another kind is two component anti-corrosion primers, and it is divided into again two component epoxy amine curing system and urethane cures system.Epoxy anticorrosion primer has good antiseptic property and sticking power, but certainly does under condition in the winter time, and the rate of drying of coating is slower, can't meet the construction technology that the quick-drying particular requirement is arranged; Polyurethane primer is very fast at drying property, but its antiseptic property is poor again, can not meet machinery industry to the rot-resistant requirement.
Summary of the invention
Therefore, for above-mentioned problem, the present invention proposes a kind ofly to have splendid antiseptic property, antiseptic property and common epoxy primer and have quite, again polyurethane primer low temperature rapid drying performance, tough and hard wear resistant, strong adhesion, solvent-borne type low temperature fast-setting two-component epoxy coating that shock resistance is good and preparation method thereof.
For solving this technical problem, the present invention takes following scheme: a kind of solvent-borne type low temperature fast-setting two-component epoxy coating, comprise main paint and solidifying agent, and described each combined composition of main paint comprises:
Epoxy resin 18-35 weight part
Thinner 5-15 weight part
Auxiliary agent 0.2-3 weight part
Rust-stabilising pigment 15-35 weight part
Pigment 3-15 weight part
Filler 20-35 weight part
Thixotropic agent 0.5-5 weight part;
Each combined composition of described solidifying agent comprises:
Amine resins 60-80 weight part
Thinner 10-25 weight part
Auxiliary agent 3-8 weight part.
Further, described main paint and solidifying agent are by weight (8-10): (1.0-2.0) mix use.
Further, described epoxy resin is any one or more than one the mixture in bisphenol A epoxide resin, bisphenol F epoxy resin, brominated epoxy resin, novolac epoxy, aliphatic epoxy resin or Nuo Fuleke epoxy resin.
Further, described thinner is any one or more than one the mixture in toluene, dimethylbenzene, butanols, ethanol, vinyl acetic monomer, N-BUTYL ACETATE, methyl ethyl ketone, cyclohexane, ethylene glycol monobutyl ether.
Further, described auxiliary agent is any one or more than one the mixture in defoamer, flow agent, wetting agent, adhesion promoter, siccative.
Further, described rust-stabilising pigment is any one or more than one the mixture in zinc phosphate, iron mica, aluminium triphosphate, aluminium powder, ferrophosphorus powder, zinc-chrome yellow.
Further, described thixotropic agent is any one or more than one the mixture in organobentonite, aerosil, hydrogenated castor oil or polyamide wax.
Further, described filler is any one or more than one the mixture in talcum powder, silicon powder, glass flake, nano-calcium carbonate, process white, sericite or kaolin.
Further, described amine resins is any one or more than one the mixture in mannich base class solidifying agent, modified by cardanol amine curing agent, aliphatic polyamine class solidifying agent, aliphatic amide affixture class solidifying agent, amido amine solidifying agent, amino polyamide resin solidifying agent, alicyclic ring amine curing agent, aromatic amine curing agent, fragrant fat amine curing agent or kitimine solidifying agent.
A kind of preparation method of solvent-borne type low temperature fast-setting two-component epoxy coating, comprise the steps:
(1) preparation of main paint: extracting epoxy resin 18-35 weight part, thinner 5-15 weight part, auxiliary agent 0.2-3 weight part add the cylinder high speed to stir successively, add while stirring rust-stabilising pigment 15-35 weight part, pigment 3-15 weight part, filler 20-35 weight part, thixotropic agent 0.5-5 weight part, after high speed dispersion is even, with shredder, grind again, fineness≤50 μ m, then obtain main paint after with filtering net, filtering;
(2) preparation of solidifying agent: amine resins 60-80 weight part, thinner 10-25 weight part and auxiliary agent 3-8 weight part are added in cylinder successively, and low speed disperses 30min, and temperature is controlled≤50 ℃, then obtains solidifying agent after with filtering net, filtering;
(3) main paint and solidifying agent mixed construction form dope layer: first upper two steps are obtained to main paint and solidifying agent ratio (8-10) by weight: (1.0-2.0) allotment stirs, add again thinner to adjust working viscosity, through normal air spraying equipment or Airless spraying equipment, be atomised to the construction surface, through the crosslinked film forming of chemical reaction, form dope layer.
By adopting the aforementioned techniques scheme, the invention has the beneficial effects as follows: first prepare two components of main paint and solidifying agent, again main paint and solidifying agent are stirred by weight ratio 9:1 allotment, add again thinner to adjust working viscosity, through normal air spraying equipment or Airless spraying equipment, be atomised to the construction surface, make this dope layer have fast setting, operating efficiency is high, energy-conserving and environment-protective, tough and hard wear resistant, strong adhesion, shock resistance is good, the characteristic of antiseptic property excellence, this coating can reach partly in 4 hours in 5 ℃ of situations does something in disregard of obstacles, after 12 hours, can reach and do solid work.Salt spray resistance can reach more than 1000 hours.
Embodiment
Below in conjunction with embodiment, specifically introduce the present invention.
Solvent-borne type low temperature fast-setting two-component epoxy coating of the present invention, comprise main paint and solidifying agent, and described each combined composition of main paint comprises:
Epoxy resin 27 weight parts
Thinner 10 weight parts
Auxiliary agent 1.6 weight parts
Rust-stabilising pigment 25 weight parts
Pigment 9 weight parts
Filler 27 weight parts
Thixotropic agent 3 weight parts;
Each combined composition of described solidifying agent comprises:
Amine resins 70 weight parts
Thinner 18 weight parts
Auxiliary agent 6 weight parts.
After preparing, described main paint and solidifying agent mix use by weight 9:1, described epoxy resin is bisphenol F epoxy resin, described thinner is the mixture of toluene and dimethylbenzene, described auxiliary agent is the mixture of defoamer and wetting agent, described rust-stabilising pigment is the mixture of zinc phosphate and iron mica, described thixotropic agent is the mixture of organobentonite and aerosil, described filler is the mixture of talcum powder, silicon powder and glass flake, and described amine resins is the mixture of mannich base class solidifying agent and aromatic amine curing agent.
Adopt above-mentioned solvent-borne type low temperature fast-setting two-component epoxy coating formula to prepare solvent-borne type low temperature fast-setting two-component epoxy coating, comprise the steps:
(1) preparation of main paint: extracting epoxy resin 27 weight parts, thinner 10 weight parts, auxiliary agent 1.6 weight parts add the cylinder high speed to stir successively, add while stirring rust-stabilising pigment 25 weight parts, pigment 9 weight parts, filler 27 weight parts, thixotropic agent 3 weight parts, after high speed dispersion is even, with shredder, grind again, fineness≤50 μ m get final product, then obtain main paint after with filtering net, filtering;
(2) preparation of solidifying agent: amine resins 60 weight parts, thinner 18 weight parts of living, auxiliary agent 6 weight parts are added in cylinder successively, and low speed disperses 30min, and temperature is controlled≤50 ℃, then obtains solidifying agent after with filtering net, filtering;
(3) main paint and solidifying agent mixed construction form dope layer: first upper two steps are obtained to main paint and solidifying agent and stir by weight ratio 9:1 allotment, add again the 30%-50% thinner to adjust working viscosity, through normal air spraying equipment or Airless spraying equipment, be atomised to the construction surface, through the crosslinked film forming of chemical reaction, form dope layer.
In the present invention in the following scope of each component proportion of formula of solvent-borne type low temperature fast-setting two-component epoxy coating as good: described each combined composition of main paint comprises: epoxy resin 18-35 weight part; Thinner 5-15 weight part; Auxiliary agent 0.2-3 weight part; Rust-stabilising pigment 15-35 weight part; Pigment 3-15 weight part; Filler 20-35 weight part; Thixotropic agent 0.5-5 weight part; Each combined composition of described solidifying agent comprises: amine resins 40-80 weight part; Thinner 10-25 weight part; Auxiliary agent 3-8 weight part.Wherein said main paint and solidifying agent be (8-10) by weight: (0.5-1.5) mix use, described epoxy resin is bisphenol A epoxide resin, bisphenol F epoxy resin, brominated epoxy resin, novolac epoxy, any one or more than one mixture in aliphatic epoxy resin or Nuo Fuleke epoxy resin, described thinner are toluene, dimethylbenzene, butanols, ethanol, vinyl acetic monomer, N-BUTYL ACETATE, methyl ethyl ketone, cyclohexane, any one in ethylene glycol monobutyl ether or more than one mixture, described auxiliary agent are defoamer, flow agent, wetting agent, adhesion promoter, any one in siccative or more than one mixture, described rust-stabilising pigment are zinc phosphate, iron mica, aluminium triphosphate, aluminium powder, the ferrophosphorus powder, any one in zinc-chrome yellow or more than one mixture, described thixotropic agent are organobentonite, aerosil, any one or more than one mixture in hydrogenated castor oil or polyamide wax, described filler are talcum powder, silicon powder, glass flake, nano-calcium carbonate, process white, any one or more than one mixture in sericite or kaolin, described amine resins are mannich base class solidifying agent, the modified by cardanol amine curing agent, aliphatic polyamine class solidifying agent, aliphatic amide affixture class solidifying agent, amido amine solidifying agent, amino polyamide resin solidifying agent, the alicyclic ring amine curing agent, aromatic amine curing agent, any one or more than one mixture in virtue fat amine curing agent or kitimine solidifying agent.
The present invention is by selecting the larger epoxy resin of the high and reactive behavior of second-order transition temperature, and the amine curing agent that the adapted speed of response is fast, solve the slow shortcoming of rate of drying.By introducing polynary amino, be the catalyzer reacted as epoxy resin cure with the slightly acidic phenolic hydroxyl group, thereby make this system at low temperatures also can fast setting, by long linear, provide good intrinsic toughening effect to body, and the curing reaction to system has initial space steric effect, and adopt simultaneously volatilizable type curing inhibitors to regulating working life, thereby make system still have simultaneously the good usage period quick-setting, by selecting color stuffing and the functive that antiseptic property is good, through the allotment of different proportionings to reach excellent preservative effect, namely first prepare two components of main paint and solidifying agent, again main paint and solidifying agent are stirred by weight ratio 9:1 allotment, add again thinner to adjust working viscosity, through normal air spraying equipment or Airless spraying equipment, be atomised to the construction surface, make this dope layer have fast setting, operating efficiency is high, energy-conserving and environment-protective, tough and hard wear resistant, strong adhesion, shock resistance is good, the characteristic of antiseptic property excellence, this coating can reach partly in 4 hours in 5 ℃ of situations does something in disregard of obstacles, after 12 hours, can reach and do solid work.Salt spray resistance can reach more than 1000 hours.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (10)
1. solvent-borne type low temperature fast-setting two-component epoxy coating, it is characterized in that: comprise main paint and solidifying agent, described each combined composition of main paint comprises:
Epoxy resin 18-35 weight part
Thinner 5-15 weight part
Auxiliary agent 0.2-3 weight part
Rust-stabilising pigment 15-35 weight part
Pigment 3-15 weight part
Filler 20-35 weight part
Thixotropic agent 0.5-5 weight part;
Each combined composition of described solidifying agent comprises:
Amine resins 60-80 weight part
Thinner 10-25 weight part
Auxiliary agent 3-8 weight part.
2. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1 is characterized in that: described main paint and solidifying agent are by weight (8-10): (1.0-2.0) mix use.
3. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1, it is characterized in that: described epoxy resin is any one or more than one the mixture in bisphenol A epoxide resin, bisphenol F epoxy resin, brominated epoxy resin, novolac epoxy, aliphatic epoxy resin or Nuo Fuleke epoxy resin.
4. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1, it is characterized in that: described thinner is any one or more than one the mixture in toluene, dimethylbenzene, butanols, ethanol, vinyl acetic monomer, N-BUTYL ACETATE, methyl ethyl ketone, cyclohexane, ethylene glycol monobutyl ether.
5. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1, it is characterized in that: described auxiliary agent is any one or more than one the mixture in defoamer, flow agent, wetting agent, adhesion promoter, siccative.
6. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1, it is characterized in that: described rust-stabilising pigment is any one or more than one the mixture in zinc phosphate, iron mica, aluminium triphosphate, aluminium powder, ferrophosphorus powder, zinc-chrome yellow.
7. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1, it is characterized in that: described thixotropic agent is any one or more than one the mixture in organobentonite, aerosil, hydrogenated castor oil or polyamide wax.
8. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1, it is characterized in that: described filler is any one or more than one the mixture in talcum powder, silicon powder, glass flake, nano-calcium carbonate, process white, sericite or kaolin.
9. a kind of solvent-borne type low temperature fast-setting two-component epoxy coating according to claim 1, it is characterized in that: described amine resins is any one or more than one the mixture in mannich base class solidifying agent, modified by cardanol amine curing agent, aliphatic polyamine class solidifying agent, aliphatic amide affixture class solidifying agent, amido amine solidifying agent, amino polyamide resin solidifying agent, alicyclic ring amine curing agent, aromatic amine curing agent, fragrant fat amine curing agent or kitimine solidifying agent.
10. the preparation method of a solvent-borne type low temperature fast-setting two-component epoxy coating, is characterized in that: comprise the steps:
(1) preparation of main paint: extracting epoxy resin 18-35 weight part, thinner 5-15 weight part, auxiliary agent 0.2-3 weight part add the cylinder high speed to stir successively, add while stirring rust-stabilising pigment 15-35 weight part, pigment 3-15 weight part, filler 20-35 weight part, thixotropic agent 0.5-5 weight part, after high speed dispersion is even, with shredder, grind again, fineness≤50 μ m, then obtain main paint after with filtering net, filtering;
(2) preparation of solidifying agent: amine resins 60-80 weight part, thinner 10-25 weight part and auxiliary agent 3-8 weight part are added in cylinder successively, and low speed disperses 30min, and temperature is controlled≤50 ℃, then obtains solidifying agent after with filtering net, filtering;
(3) main paint and solidifying agent mixed construction form dope layer: first upper two steps are obtained to main paint and solidifying agent ratio (8-10) by weight: (1.0-2.0) allotment stirs, add again thinner to adjust working viscosity, through normal air spraying equipment or Airless spraying equipment, be atomised to the construction surface, through the crosslinked film forming of chemical reaction, form dope layer.
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