CN111100519A - Single-component water-based anticorrosive primer for casting parts and preparation method thereof - Google Patents
Single-component water-based anticorrosive primer for casting parts and preparation method thereof Download PDFInfo
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- CN111100519A CN111100519A CN202010004888.1A CN202010004888A CN111100519A CN 111100519 A CN111100519 A CN 111100519A CN 202010004888 A CN202010004888 A CN 202010004888A CN 111100519 A CN111100519 A CN 111100519A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
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Abstract
The invention discloses a single-component water-based anticorrosive primer for casting parts and a preparation method thereof. A preparation method of a single-component water-based anticorrosive primer for casting components comprises the following steps: (1) weighing the components in proportion, mixing the deionized water and the cosolvent, adding the rheological control agent, and stirring and mixing uniformly; (2) adding a defoaming agent, a wetting agent and a dispersing agent into the slurry obtained in the step 1, and uniformly stirring; (3) adding pigment into the slurry obtained in the step (2), stirring, grinding to obtain aqueous pigment slurry, adding filler and anti-rust pigment into the prepared aqueous pigment slurry, grinding again, filtering to obtain aqueous anti-rust pigment slurry, and controlling the temperature of the slurry to be below 40 ℃; (4) filtering the water-based vinyl acrylic copolymer emulsion by using a filter screen, adding a pH regulator to regulate the pH value to a required range, adding the pH regulator into the prepared water-based antirust pigment slurry, and uniformly stirring; (5) and (4) adding the rest materials into the slurry obtained in the step (4) and uniformly stirring.
Description
Technical Field
The invention relates to a water-based anticorrosive primer for a casting part, and belongs to the technical field of anticorrosive paints. The invention also relates to a preparation method of the water-based anticorrosive primer.
Background
The goals pursued by the paint coating industry are low VOC emission, low cost coating, high coating quality, that is, the environmental protection is required to reach the standard, the coating quality is optimal, and the comprehensive cost, energy consumption, investment cost and reconstruction implementation are minimum. The preparation of the water-based anticorrosive paint commonly used in the market at present usually has the following routes, one is the preparation of water-based epoxy resin and polyamine curing agent, the other is the preparation of polyamine aqueous dispersion and epoxy resin curing agent, and the preparation of water-based acrylic acid or alkyd resin and emulsion. The existing water-based anticorrosive paint has the defects of poor salt spray resistance, poor adhesion to metal substrates, non-compact paint film, poor coating quality, poor isolation effect on water, carbon dioxide and oxygen and the like, has pungent smell, is stinky during field construction, and also needs investment and purchase of VOC treatment facilities.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the single-component water-based anticorrosive primer for the casting, which has excellent salt spray resistance, excellent anticorrosive performance, excellent oil resistance, water resistance and salt water resistance, nearly zero VOC, tough and dense paint film and good adhesion with a substrate.
The invention is realized by the following technical scheme: the single-component water-based anticorrosive primer for the casting component is characterized by comprising the following components in parts by weight: comprises the following components in parts by weight: comprises the following components in parts by weight: 10-16 parts of deionized water, 1-2 parts of cosolvent, 0.2-0.5 part of rheological control agent, 0.2-0.4 part of defoaming agent, 0.3-1 part of pigment wetting agent, 0.5-1 part of dispersing agent, 2-5 parts of color pigment, 10-19 parts of antirust pigment, 3.6-6.6 parts of filler, 55-70 parts of water-based vinyl acrylic copolymer emulsion, 0.5-1 part of flash rust inhibitor, 1-2 parts of film-forming assistant and 0.2-0.5 part of pH regulator.
The vinyl acrylic copolymer is used as a main film forming material, has a good isolation effect on water, carbon dioxide and oxygen, has ultralow transmittance, has good adhesive force on different metal substrates, simultaneously well balances hardness and flexibility, has excellent salt spray resistance and barrier property, and is nonflammable.
Further, the water-based vinyl acrylic copolymer is a Tesmann resin emulsion H202.
Further, the cosolvent is ethylene glycol butyl ether or propylene glycol methyl ether or diethylene glycol butyl ether.
Further, the pH regulator is one or more of ammonia water and triethylamine. The selected pH regulator is volatile, volatilizes in the resin film forming process, cannot remain in the paint film to influence the performance of the paint, has alkali residue, is easy to absorb moisture, and has the hidden quality troubles of paint film light loss, poor adhesion and paint removal.
Further, the rheological control agent is a hydrophobic modified polyurethane rheological additive.
Further, the surface of the hydrophobic modified polyurethane type rheological aid is provided with spherical particles of silanol groups.
The invention also provides a preparation method of the single-component water-based anticorrosive primer for the casting component, which is characterized by comprising the following steps of: the method comprises the following steps:
(1) weighing the components in proportion, mixing the deionized water and the cosolvent, adding the rheological control agent, and stirring and mixing uniformly;
(2) adding a defoaming agent, a wetting agent and a dispersing agent into the slurry obtained in the step 1, and uniformly stirring;
(3) adding pigment into the slurry obtained in the step (2), stirring, grinding to obtain aqueous pigment slurry, adding filler and anti-rust pigment into the prepared aqueous pigment slurry, grinding again, filtering to obtain aqueous anti-rust pigment slurry, and controlling the temperature of the slurry to be below 40 ℃;
(4) filtering the water-based vinyl acrylic copolymer emulsion by using a filter screen, adding a pH regulator to regulate the pH value to a required range, adding the pH regulator into the prepared water-based antirust pigment slurry, and uniformly stirring;
(5) and (4) adding the rest materials into the slurry obtained in the step (4) and uniformly stirring.
In the invention, the aqueous pigment paste needs to be prepared separately, the aqueous pigment paste cannot be co-ground with the filler, the filler and the antirust pigment are added after the pigment paste is prepared, the pigment paste is prepared by grinding again, the sequence cannot be reversed, the pigment is not easy to grind, the selected wetting dispersant is different according to different colors, when the wetting dispersant is selected for the pigment, the filler is added simultaneously, the filler is easy to disperse, and the pigment paste is unstable. The water-based pigment paste is prepared separately, and then the filler and the anti-rust pigment are added, the pigment paste is viscous liquid, and the filler is added and then is uniformly stirred, so that the grinding speed is accelerated, the grinding time is shortened, the production efficiency can be improved, and the stability of the color paste is kept. In the present invention, the aqueous vinyl acrylic copolymer needs to be separately pH-adjusted for the purpose of: the aqueous vinyl acrylic copolymer has strong acidity, is unstable in a formula system if the pH value is not adjusted, is easy to separate out, and is immiscible with other components to cause the rapid increase of viscosity. In the invention, the adjusted water-based vinyl acrylic copolymer needs to be filtered and then added into the water-based antirust pigment paste, the attention sequence can not be reversed, otherwise, the color paste can be separated out. The adjusted resin liquid has a low pH value, and the color paste is added into the resin liquid after the sequence is reversed, because the color paste has a high pH value, the color paste is added into the resin liquid with a low pH value, and a small amount of the color paste with a high pH value is added into a large amount of the resin liquid with a low pH value, so that the color paste is unstably separated out from the resin liquid.
Further, in the step 1, the stirring speed when the deionized water and the cosolvent are mixed is 1500r/min for 1000-; the stirring speed in the step 2 is 2000-; in the step 3, after the pigment is added, stirring is carried out for 5mins at the stirring speed of 2000-; in the step 4, stirring at a low speed of 200-; the stirring speed in the step 5 is 500-.
Further, in step 4, the aqueous vinyl acrylic copolymer emulsion after pH adjustment to 4 to 5 is added to the aqueous rust preventive pigment paste slowly. The pH value of the water-based vinyl acrylic copolymer emulsion is low, the color paste is slowly added, a small amount of resin liquid is uniformly contacted with the color paste, the speed is low, the addition amount is small, and the balanced mixing and dissolving of the resin liquid and the color paste are facilitated.
Further, in step 3, grinding until the fineness is less than 30um during grinding; in step 4, the aqueous vinyl acrylic copolymer emulsion is filtered through a 200 mesh screen.
The invention has the beneficial effects that: the single-component water-based anticorrosive primer is prepared by adopting the vinyl acrylic copolymer as a main film forming material through a special preparation process and a preferable material component ratio, has higher salt spray resistance, excellent anticorrosive performance, excellent oil resistance, water resistance and salt water resistance, VOC (volatile organic compounds) close to zero, tough and compact paint film, good adhesive force with a substrate, especially obvious anticorrosive performance effect of a rough casting, excellent coating quality, good isolation effect on water, carbon dioxide and oxygen, ultralow transmittance and better balance hardness and flexibility; excellent salt spray resistance, excellent corrosion resistance and excellent barrier property, does not need investment and reconstruction in coating on-site construction facilities, and is an adaptive product which gives consideration to quality, cost and on-site application.
Detailed Description
The single-component water-based corrosion resistant primer for casting parts and the preparation method thereof according to the present invention are further illustrated by the following non-limiting examples:
example 1
The raw materials comprise:
deionized water: 16 parts of a mixture; ethylene glycol butyl ether (co-solvent): 2 parts of (1); hamming 299 (rheology control agent): 0.2-0.5 part; tego901W (digao): 0.2-0.4 part; 104E (us air chemistry): 0.3-1 part; 0.5-1 part of basf4140 (basf); color pigments (iron oxide red or carbon black): 2 parts of (1); 6.6 parts of filler (talcum powder or magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 15 parts of (1); 55 parts of resin emulsion H202 (Dusmann Netherlands); proper amount of ammonia water (0.2-0.5 parts); flash rust preventive 179 (hamming): 0.5-1 part; 1-2 parts of film-forming aid Texanol (American Isyman).
Wherein Tego901W (digao) is an antifoaming agent, 104E (American air chemistry) is a wetting agent, and basf4140 (basf) is a dispersing agent.
The reaction steps are as follows:
1. mixing deionized water and ethylene glycol monobutyl ether under stirring (at 1500r/min in a laboratory 1000), increasing the rotation speed to 2500r/min in 2000 and slowly adding a small amount of rheological control agent (preventing agglomeration), and stirring at high speed (at 2500r/min in the laboratory) until the rheological control agent is completely dissolved;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand and grinding beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4-5 by ammonia water, and stirring at a low speed in the process (200 ℃ in a laboratory and 400 r/min); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 8-15 mins.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
Example 2
The raw materials comprise:
deionized water: 10 parts of (A); 2 parts of diethylene glycol butyl ether; rheology control agent 1010 (hamming): 0.2-0.5 part; BYK022 (german pyke chemistry): 0.2-0.4 part; 104E (us air chemistry): 0.3-1 part; basf2140 (basf) 0.5-1 part; color pigments (iron oxide red or carbon black): 2 parts of (1); 6.6 parts of filler (magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 19 parts of a mixture; 57 parts of resin emulsion H202 (Dusmann Netherlands); proper amount of ammonia water (0.2-0.5 parts), flash rust inhibitor 179 (Haimins): 0.5-1 part; 1-2 parts of film-forming aid Texanol (American Isyman).
Wherein BYK022 (German Bick chemical) is an antifoaming agent; 104E (us air chemistry) is a wetting agent; basf2140 (basf) is a dispersant.
The reaction steps are as follows:
1. mixing deionized water and diethylene glycol monobutyl ether under the stirring state (1000-;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand and grinding beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by ammonia water, and stirring at a low speed in the process (200 and 400r/min in a laboratory); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 8-15 mins.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
Example 3
The raw materials comprise:
deionized water: 16 parts of a mixture; propylene glycol methyl ether: 2 parts of (1); rheology control agent 1010 (hamming): 0.2-0.5 part; MO2134 (basf chemistry): 0.2-0.4 part; wetting agent W77 (hamming): 0.3-1 part; 0.5-1 part of basf4140 (Pasf chemical); color pigments (iron oxide red or carbon black): 2 parts of (1); 6.6 parts of filler (talcum powder or magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 11 parts of (1); 59 parts of resin emulsion H202 (Dusmann Netherlands); proper amount of ammonia water (0.2-0.5 parts); flash rust preventive 179 (hamming): 0.5-1 part; coalescent Texanol (American Istmann): 1-2 parts.
Wherein MO2134 (Pasteur chemical) is an antifoaming agent; basf4140 (basf chemical) is a dispersant.
The reaction steps are as follows:
1. mixing deionized water and propylene glycol methyl ether under stirring (1500 r/min in laboratory 1000-;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand and grinding beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by ammonia water, and stirring at a low speed in the process (200 and 400r/min in a laboratory); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 8-15 mins.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
Example 4
Deionized water: 10 parts of (A); diethylene glycol butyl ether: 2 parts of (1); rheology agent 1010 (hamming): 0.2-0.5 part; MO2134 (basf chemistry): 0.2-0.4 part; wetting agent W77 (hamming): 0.3-1 part; 0.5-1 part of basf4140 (Pasf chemical); color pigments (iron oxide red or carbon black): 3 parts of a mixture; 5.6 parts of filler (talc powder or magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 15 parts of (1); 61 parts of resin emulsion H202 (Dusmann Netherlands); proper amount of ammonia water (0.2-0.5 parts), flash rust inhibitor 179 (Haimins): 0.5-1 part; coalescent Texanol (American Istmann): 1-2 parts.
In the formula, MO2134 (BASF CHEMICAL) is an antifoaming agent, and basf4140 (BASF CHEMICAL) is a dispersant.
The reaction steps are as follows:
1. mixing deionized water and diethylene glycol monobutyl ether under the stirring state (1000-;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by ammonia water, and stirring at a low speed in the process (200 and 400r/min in a laboratory); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 8-15 min.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
Example 5
Deionized water: 13 parts; ethylene glycol butyl ether: 2 parts of (1); rheology control agent 1010 (hamming): 0.2-0.5 part; MO2134 (basf chemistry): 0.4 part; wetting agent W77 (hamming): 0.3-1 part; 0.5-1 part of basf4140 (Pasf chemical); color pigments (iron oxide red or carbon black): 2 parts of (1); 6.5 parts of filler (talc powder or magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 10.1 parts; 63 parts of resin emulsion H202 (Dusmann Netherlands); appropriate amount of triethylamine (about 0.2-0.5 parts), flash rust preventive 179 (hamming): 0.5-1 part; coalescent Texanol (American Istmann): 1-2 parts.
In the formula, MO2134 (BASF CHEMICAL) is an antifoaming agent, and basf4140 (BASF CHEMICAL) is a dispersant.
The reaction steps are as follows:
1. mixing deionized water and ethylene glycol monobutyl ether under stirring (in a laboratory at 1000-1500r/min), increasing the rotation speed to 2000-2500r/min, slowly adding a small amount of rheological control agent (for preventing agglomeration), and stirring at high speed (in the laboratory at 2500r/min) until the rheological control agent is completely dissolved;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by triethylamine, and stirring at a low speed in the process (200-400 r/min in a laboratory); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 8-15 mins.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
Example 6
Deionized water: 10 parts of (A); diethylene glycol butyl ether: 2 parts of (1); rheology control agent 1010 (hamming): 0.2-0.5 part; MO2134 (basf chemistry): 0.2-0.4 part; wetting agent W77 (hamming): 0.3-1 part; 0.5-1 part of basf4140 (Pasf chemical); color pigments (iron oxide red or carbon black): 5 parts of a mixture; 3.6 parts of filler (talcum powder or magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 10 parts of (A); 66 parts of resin emulsion H202 (Dusmann Netherlands); appropriate amount of triethylamine (about 0.2-0.5 parts), flash rust preventive 179 (hamming): 0.5-1 part; coalescent Texanol (American Istmann): 1-2 parts.
In the formula, MO2134 (BASF CHEMICAL) is an antifoaming agent, and basf4140 (BASF CHEMICAL) is a dispersant.
The reaction steps are as follows:
1. mixing deionized water and diethylene glycol monobutyl ether under the stirring state (1000-;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by triethylamine, and stirring at a low speed in the process (200-400 r/min in a laboratory); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 8-15 mins.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
Example 7
The raw materials comprise:
deionized water: 10 parts of (A); ethylene glycol butyl ether: 2 parts of (1); rheology control agent 1010 (hamming): 0.2-0.5 part; BYK022 (german pyke chemistry): 0.2-0.4 part; 104E (us air chemistry): 0.3-1 part; basf2140 (basf) 0.5-1 part; color pigments (iron oxide red or carbon black): 2 parts of (1); 4.6 parts of filler (magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 10 parts of (A); 68 parts of resin emulsion H202 (Dusmann Netherlands); proper amount of ammonia water (0.2-0.5 parts), flash rust inhibitor 179 (Haimins): 0.5-1 part; 1-2 parts of film-forming aid Texanol (American Isyman).
Wherein BYK022 (German Bick chemical) is an antifoaming agent, 104E (American air chemistry) is a wetting agent, and basf2140 (basf) is a dispersing agent.
The reaction steps are as follows:
1. mixing deionized water and ethylene glycol monobutyl ether under stirring (at 1500r/min in a laboratory 1000), increasing the rotation speed to 2500r/min in 2000 and slowly adding a small amount of rheological control agent (preventing agglomeration), and stirring at high speed (at 2500r/min in the laboratory) until the rheological control agent is completely dissolved;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by ammonia water, and stirring at a low speed in the process (200 and 400r/min in a laboratory); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 10 mins.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
Example 8
The raw materials comprise:
deionized water: 10 parts of (A); ethylene glycol butyl ether: 1 part; rheology control agent 1010 (hamming): 0.2-0.5 part; BYK022 (german pyke chemistry): 0.2-0.4 part; 104E (us air chemistry): 0.3-1 part; basf2140 (basf) 0.5-1 part; color pigments (iron oxide red or carbon black): 2 parts of (1); 3.6 parts of filler (magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 10 parts of (A); 70 parts of resin emulsion H202 (Dusmann Netherlands); proper amount of ammonia water (0.2-0.5 parts), flash rust inhibitor 179 (Haimins): 0.5-1 part; 1-2 parts of film-forming aid Texanol (American Isyman).
Wherein BYK022 (German Bick chemical) is an antifoaming agent, 104E (American air chemistry) is a wetting agent, and basf2140 (basf) is a dispersing agent.
The reaction steps are as follows:
1. mixing deionized water and ethylene glycol butyl ether under stirring (laboratory 1000-;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by ammonia water, and stirring at a low speed in the process (200 and 400r/min in a laboratory); the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 10 mins.
Other additives, such as preservatives, may also be added to the formulation of this example, as desired.
The quality performance of the single-component water-based anticorrosion primer for the casting component of the embodiment is shown in the attached table 1.
In the invention, a great deal of experimental screening is carried out on the selection of the rheological control agent, the wetting agent, the dispersing agent and the defoaming agent. The matching of color pigments, fillers, and anti-rust pigments, and the stability and storage of the overall formulation, require extensive validation. The addition of co-solvents, rheology control agents, defoamers, wetting agents, dispersants in the formulation is generally carried out in the minimum amount of the range, with cost considerations in preference. The color pigment, the filler and the antirust pigment in the formula are added according to the requirements of salt spray resistance and covering power, and generally meet the requirements, and the lower limit of the range is reached. Other additives such as anticorrosive, antirust and film-forming additives generally meet the requirements, and the lower limit of the range is reached unless special requirements are met, the cast parts are rough, and the antirust requirements improve the standards.
As can be seen from the attached table 1, the coating has the advantages of good anticorrosion effect, good adhesion to metal substrates, excellent coating quality, excellent salt spray resistance and excellent barrier property. In addition, the invention adopts the vinyl acrylic acid copolymer as a main film forming material, and the VOC is close to zero.
The present invention will be further described below by taking the water-based anticorrosive paint in which the main stream epoxy emulsion used in the current market is used as the main film-forming material as a comparative example of the present invention.
Comparative example 9
The raw materials comprise:
deionized water: 16 parts of a mixture; ethylene glycol butyl ether (co-solvent): 2 parts of (1); rheology control agent 299 (hamming 299): 0.2 part; tego901W (digao): 0.4 part; 104E (us air chemistry): 0.3 part; basf4140 (basf): 0.5 parts; color pigments (iron oxide red or carbon black): 2 parts of (1); 6.6 parts of filler (talcum powder or magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 15 parts of (1); 55 parts of epoxy emulsion of a company known as a company; appropriate amount of ammonia (0.5 part), flash rust preventive 179 (hamming): 0.5 part; film-forming aid Texanol (American Istmann) 1 portion.
The reaction steps are as follows:
1. mixing deionized water and ethylene glycol monobutyl ether under the stirring state (1000-;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, and stirring at a low speed in the process (200-; adding the resin emulsion to the previous slurry (note that the resin is added to the slurry in this order) with stirring (laboratory 500 r/min);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 10 mins.
The quality properties of this example are shown in the attached Table 2.
Comparative example 10
The raw materials comprise:
deionized water: 10 parts of (A); diethylene glycol butyl ether: 2 parts of (1); rheology agent 1010 (hamming): 0.2 part; MO2134 (basf chemistry): 0.4 part; wetting agent W77 (hamming): 0.3 part; basf4140 (basf chemical) 0.5 parts; color pigments (iron oxide red or carbon black): 3 parts of a mixture; 5.6 parts of filler (talcum powder or magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 15 parts of (1); 61 parts of epoxy emulsion of a certain known company; appropriate amount of ammonia (0.5 part), flash rust preventive 179 (hamming): 0.5 part; coalescent Texanol (American Istmann): 1 part.
The reaction steps are as follows:
1. mixing deionized water and diethylene glycol monobutyl ether under a stirring state (1000-1500 r/min in a laboratory), increasing the rotating speed to 2000r/min, slowly adding a small amount of rheological control agent (preventing agglomeration), and stirring at a high speed (2500 r/min in the laboratory) until the rheological control agent is completely dissolved;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, and stirring at a low speed in the process (200-; the resin emulsion was slowly added to the preceding slurry (note that the order of addition of resin to the slurry was in this order) with stirring (laboratory 500 r/min);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 10 mins.
The quality properties of this example are shown in the attached Table 2.
Comparative example 11
The raw materials comprise:
deionized water: 10 parts of (A); ethylene glycol butyl ether: 2 parts of (1); rheology agent 1010 (hamming): 0.2 part; BYK022 (german pyke chemistry): 0.4 part; 104E (us air chemistry): 0.3 part; basf2140 (basf) 0.5 parts; color pigments (iron oxide red or carbon black): 2 parts of (1); 3.6 parts of filler (magnesium hydroxide powder); K-White105 rust inhibitive pigment (Japan empire chemical): 10 parts of (A); 70 parts of epoxy emulsion of certain known company; appropriate amount of ammonia water (0.5 part), anti-flash embroidery agent 179 (hamming): 0.5 part; film-forming aid Texanol (American Istmann) 1 portion.
The reaction steps are as follows:
1. mixing deionized water and ethylene glycol monobutyl ether under the stirring state (1000-;
2. adding a defoaming agent, a wetting agent and a dispersing agent under the stirring state (in a laboratory at 2000-;
3. adding color pigment under stirring (2000 r/min in laboratory), dispersing at high speed (2500 r/min in laboratory) for 5mins, sanding to fineness less than 30um, adding filler and antirust pigment, sanding to fineness less than 30um, filtering to remove sand beads, and cooling the slurry to below 40 deg.C;
4. filtering the resin emulsion by a 200-mesh filter screen, adjusting the pH value to 4 by ammonia water, and stirring at a low speed in the process (an experiment room is 200-; the resin emulsion was slowly added to the preceding slurry with stirring (laboratory 500r/min) (note that the order of addition of resin to the slurry was in this order);
5. slowly adding the rest materials, and stirring at low speed (800 r/min in laboratory) for 10 mins.
The quality properties of this example are shown in the attached Table 2.
As can be seen from the quality performance of the comparative examples, the epoxy emulsion of the system which is mainly used in the market at present has inferior salt spray resistance and corrosion resistance compared with the Tesmann H202 adopted in the invention.
Attached table 1: quality Performance Table for various embodiments of the invention
Attached table 2: quality Performance Table of comparative example
Other parts in this embodiment are the prior art, and are not described herein again.
Claims (10)
1. The single-component water-based anticorrosive primer for the casting component is characterized by comprising the following components in parts by weight: comprises the following components in parts by weight: 10-16 parts of deionized water, 1-2 parts of cosolvent, 0.2-0.5 part of rheological control agent, 0.2-0.4 part of defoaming agent, 0.3-1 part of pigment wetting agent, 0.5-1 part of dispersing agent, 2-5 parts of color pigment, 10-19 parts of antirust pigment, 3.6-6.6 parts of filler, 55-70 parts of water-based vinyl acrylic copolymer emulsion, 0.5-1 part of flash rust inhibitor, 1-2 parts of film-forming assistant and 0.2-0.5 part of pH regulator.
2. The single-component water-based anti-corrosion primer for casting parts as claimed in claim 1, wherein: the water-based vinyl acrylic copolymer emulsion is Tesmann resin emulsion H202.
3. The single-component water-based anti-corrosion primer for casting parts as claimed in claim 1, wherein: the cosolvent is ethylene glycol butyl ether or propylene glycol methyl ether or diethylene glycol butyl ether.
4. The single-component water-based anti-corrosion primer for casting parts as claimed in claim 1, wherein: the pH regulator is one or more of ammonia water and triethylamine.
5. The single component waterborne corrosion resistant primer for casting of claim 1 or 2 or 3 or 4, wherein: the rheological control agent is a hydrophobic modified polyurethane rheological additive.
6. The single-component water-based anti-corrosion primer for casting parts as claimed in claim 5, wherein: the surface of the hydrophobic modified polyurethane rheological additive is provided with spherical particles with silanol groups.
7. A method of preparing a one-component water-based corrosion resistant primer for casting parts as claimed in any one of claims 1 to 6, characterized by: the method comprises the following steps:
(1) weighing the components in proportion, mixing the deionized water and the cosolvent, adding the rheological control agent, and stirring and mixing uniformly;
(2) adding a defoaming agent, a wetting agent and a dispersing agent into the slurry obtained in the step 1, and uniformly stirring;
(3) adding pigment into the slurry obtained in the step (2), stirring, grinding to obtain aqueous pigment slurry, adding filler and anti-rust pigment into the prepared aqueous pigment slurry, grinding again, filtering to obtain aqueous anti-rust pigment slurry, and controlling the temperature of the slurry to be below 40 ℃;
(4) filtering the water-based vinyl acrylic copolymer emulsion by using a filter screen, adding a pH regulator to regulate the pH value to a required range, adding the pH regulator into the prepared water-based antirust pigment slurry, and uniformly stirring;
(5) and (4) adding the rest materials into the slurry obtained in the step (4) and uniformly stirring.
8. The preparation method of the single-component water-based anti-corrosion primer for the casting component as claimed in claim 7, wherein the preparation method comprises the following steps: in the step 1, the stirring speed when the deionized water and the cosolvent are mixed is 1500r/min for 1000-; the stirring speed in the step 2 is 2000-; in the step 3, after the pigment is added, stirring is carried out for 5mins at the stirring speed of 2000-; in the step 4, in the process of adding the pH regulator, stirring at a low speed of 200-; the stirring speed in the step 5 is 500-.
9. The preparation method of the single-component water-based anti-corrosion primer for the casting component as claimed in claim 7, wherein the preparation method comprises the following steps: in step 4, the pH value is adjusted to 4-5, and the water-based vinyl acrylic copolymer emulsion after the pH value is adjusted needs to be slowly added when being added into the water-based antirust pigment slurry.
10. The method for preparing a one-component water-based corrosion resistant primer for casting components as claimed in claim 7, 8 or 9, wherein: in the step 3, grinding until the fineness is less than 30um during grinding; in step 4, the aqueous vinyl acrylic copolymer emulsion is filtered through a 200 mesh screen.
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Non-Patent Citations (1)
| Title |
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| QIUKX: "帝斯曼水性树脂在防腐涂料的应用", 《百度文库》 * |
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