CN110437717A - A kind of water paint - Google Patents
A kind of water paint Download PDFInfo
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- CN110437717A CN110437717A CN201810407982.4A CN201810407982A CN110437717A CN 110437717 A CN110437717 A CN 110437717A CN 201810407982 A CN201810407982 A CN 201810407982A CN 110437717 A CN110437717 A CN 110437717A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
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Abstract
The present invention relates to technical field of coatings, more specifically, it is related to a kind of water paint, including A product and B product, the A product include the component of following parts by weight: waterborne, polycarbonate is lotion 50-75 parts polyurethane-modified, 5-10 parts of coalescing agent, 5-10 parts of deionized water, 1-4 parts of wetting agent, 1-2 parts of defoaming agent, orients spreading agent 5-15 parts, 1-2 parts of levelling agent, 2-5 parts of association thickener；The B product include the component of following parts by weight: 10-15 parts of aluminium powder, 10-15 parts of deionized water；The weight fraction ratio of the A product and B product is A:B=4-6:14-17, and to the good adhesion of plastic basis material, the spraying of big flow, atmospheric pressure can be carried out to plastic basis material, is conducive to improve spray painting efficiency.
Description
Technical field
The present invention relates to technical field of coatings, more specifically, it relates to a kind of water paint.
Background technique
Plastic paint is very widely used, including motorcycle, electric vehicle, the helmet, TV, computer, air-conditioning, refrigerator, water dispenser
Equal plastic parts etc..Plastics paint kind mainly has polyurethane paint, acrylic paint, vinyl resin paint and epoxy resin coating, by
It is the toxic organic solvents such as banana oil, toluene, dimethylbenzene in the solvent of these paint, the health of people, while it can be endangered
Inflammable and explosive, there are hidden fire-fighting dangers.
For the existing above problem is painted, people have been developed that water paint at present.Water paint is using water as dilution
Agent, the coating without the organic solvents such as benzene,toluene,xylene, formaldehyde and free TDI toxic heavy metal, have safety and environmental protection,
The features such as water-fast, wear-resisting, ageing-resistant, color inhibition, fast drying.
It is a kind of aluminum paint, aqueous and preparation method thereof that Chinese invention patent publication No. is that CN107384170A is disclosed, including
Part A and part B, wherein part A is made of the component of following parts by weight: 50-90 parts of aqueous polyurethane emulsion, wetting agent 0.1-
5 parts, 0.01-1 parts of levelling agent, 0.02-2 parts of defoaming agent, auxiliary agent 20-45 parts of arrangement, 0.1-5 parts of neutralizer, coalescing agent 1-10
Part, 5-20 parts of water；Part B is made of the component of following parts by weight: 1-10 parts of aqueous aluminum powder, 1-10 parts of coalescing agent, and dispersing agent
0.1-3 parts.
The aluminum paint, aqueous stability of foregoing invention patent disclosure is good, is suitable for the plastic basis materials such as spraying ABS/PC.But it passes through
Test discovery, due to plastic basis material surface smoother, and the adhesiveness of water paint is low compared with oil paint, sprays on plastic basis material
If when water paint spray flow and air pressure it is biggish, due to the water paint being sprayed on plastic basis material rate of drying compared with
Slowly, not dry water paint is lower to the adhesion strength on plastic basis material surface, when not dry water paint surface continues to spray water paint,
The phenomenon that larger air-flow that spray gun sprays can make not dry water paint layer surface form cloud decorative pattern, the paint layer after making spraying hold
Easily there is the problem of silver powder floating, the phenomenon that silver powder floating occurs to reduce the paint layer of spraying, need to carry out small flow, small air pressure
Spraying, the efficiency of spraying is lower, and yield rate is lower.
Therefore it needs to propose the new scheme of one kind to solve this problem.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of water paint, to plastic basis material
Good adhesion, when spraying, the air-flow that spray gun sprays is not easy to make not dry paint layer surface to form cloud decorative pattern, can be to plastics base
Material carries out the spraying of big flow, atmospheric pressure, is conducive to improve spray painting efficiency, the aluminium powder arrangement effect of the coating after spraying is good.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of water paint, including A product and
B product, the A product include the component of following parts by weight: waterborne, polycarbonate is lotion 50-75 parts polyurethane-modified, coalescing agent
5-10 parts, 5-10 parts of deionized water, 1-4 parts of wetting agent, 1-2 parts of defoaming agent, orientation spreading agent 5-15 parts, 1-2 parts of levelling agent, form
2-5 parts of thickener；The B product include the component of following parts by weight: 10-15 parts of aluminium powder, 10-15 parts of deionized water；
The weight fraction ratio of the A product and B product is A:B=4-6:14-17.
By using above-mentioned technical proposal, the polyurethane-modified lotion of waterborne, polycarbonate is by polycarbonate polyurethane, gathers
Carbonate diol, the mixture that DMAC is main chemical compositions, it is found through experiment that, the polyurethane-modified lotion of waterborne, polycarbonate
Addition make made of water paint it is more preferable to the adhesiveness on plastic basis material surface, when spraying, the air-flow that spray gun sprays is not easy to make not dry
Paint layer surface formed cloud decorative pattern, can to plastic basis material carry out big flow, atmospheric pressure spraying, be conducive to improve spray painting effect
Rate, the coating surface after spraying is smooth, and paint layer aluminium powder arrangement effect is good, and paint layer glossiness is good.Water paint forms a film after harder, spraying
Paint layer have heat-resisting, fast light, Bearable dry and wet wipe, the performances such as wear-resisting.
Coalescing agent can be used for demineralised aqueous polycarbonate polyurethane modified emulsion, and the water paint after making film forming shows aqueous
The script performance of polycarbonate polyurethane modified emulsion improves the adhesive force of film forming efficiency and water paint.Coalescing agent can be alcohol
One of ester type compound DBG, Texanol, Lusolvan FBH, Coasol, DBE-IB, DPNB and DOWANOL PPH.
Wetting agent can be used for reducing the surface tension of plastic basis material, further increase attachment of the water paint on plastic basis material
Effect.Wetting agent can be used tego-500, tego-440, tego-245, tego432, tego-410, tego-450,
tego2100,tego270.Defoaming agent can suppress or eliminate reagent foam produced during the preparation process, improve reagent solution
Uniformity, make the substance in reagent solution be uniformly dispersed be not easy to be gathered into large particulate matter generate precipitating so that reagent is failed.Defoaming
DF-691, DF-110D etc. can be used in agent.Levelling agent can be modest levelling agent 837,835,432,435 of moral etc..Association thickener can
For N-255, TT-935,802 etc..
Bentonite major part thixotropy is higher, and anti-current hangs up properly but influences flow leveling.Water-retaining property is not so good as cellulose, whiteness
It is low, it will not biodegrade；Cellulose be in low cut and paste degree, good water-retaining property, the thixotroping of cellulose is not so good as bentonite, flow leveling ratio
Bentonite is slightly good, anti-to divide water not as good as bentonite, easily biological-degradable.Bentonite and cellulose are carried out according to above-mentioned parts by weight
Proportion is conducive to improve orientation spreading agent and aligns effect to aluminium powder in use, the effect of the two is complemented each other, and makes aluminium powder
It is not easy to arrange agglomerating or arrangement unevenly, to improve glossiness, flatness and the paint layer of spraying paint layer to plastic basis material
Adhesion property.The application property of manufactured water paint is good, and the Spray painting tool that oil paint can be used carries out greatly plastic basis material surface
Flow, atmospheric pressure spraying, spray efficiency is high, and the adhesive force of paint layer is good.
Deionized water refers to the pure water eliminated in after ionic species impurity, using deionized water as the molten of water paint
Agent, it is environmentally friendly, nontoxic, penetrating odor is not generated, and the cleannes of deionized water are higher, manufactured water paint is not easy to cause bacterium
Breeding, be conducive to extend the service life of water paint.
When the proportional quantity of the polyurethane-modified lotion of waterborne, polycarbonate is excessive, it may appear that film forming cracking, proportional quantity are very few
It will lead to paint layer surface loss of gloss after forming a film, the decline of paint layer richness；Can overbate water when the proportional quantity of coalescing agent is excessive
Property polycarbonate polyurethane modified emulsion, the speed for keeping the polyurethane-modified lotion of waterborne, polycarbonate dry is excessively slow or is difficult to do
Thoroughly, and proportional quantity it is very few when can be because the polyurethane-modified lotion of waterborne, polycarbonate fail to be sufficiently softened the paint layer after making spraying
It is easy to appear crack phenomenon；The surface tension of water paint can be made too low when the proportional quantity of wetting agent is excessive, be sprayed at plastics base
The water paint on material surface is easy to appear sagging phenomenon, and when repeating to spray water paint, the adhesion of water paint is poor, when proportional quantity is very few
When the surface tension of plastic basis material can be made excessively high, water paint is sprawled not open on plastic basis material, and shrinkage cavity occurs in the paint layer after spraying
Phenomenon；When the proportional quantity of defoaming agent is excessive, the blending of water paint and plastic basis material is poor, and the paint layer after spraying is easy to appear
Shrinkage cavity phenomenon, foam when proportional quantity is very few in water paint solution is excessive, and the paint layer after spraying is easy to appear volcanic crater；Orientation paving
The proportional quantity of spreader can excessively make the viscosity for the water paint being configured to excessively high, keep aluminium powder arrangement agglomerating, and meeting when proportional quantity is very few
Cause aluminium powder arrangement uneven, application property is deteriorated；The proportional quantity of thickener the viscosity of water paint can be made excessively high when excessive or very few or
It is too low, it can reduce the workability of water paint.
The present invention is further arranged to: the orientation spreading agent is made of cellulose, bentonite and deionized water, the fibre
The weight fraction ratio of dimension element, bentonite and deionized water is 8-16:3-8:40.
By using above-mentioned technical proposal, it is found through experiment that, when each component of orientation spreading agent uses above-mentioned parts by weight
Than when, manufactured water paint viscosity be suitable for, aluminium powder can be oriented arrangement on plastic basis material surface, make spray after paint layer gloss
Degree is more preferable, tinting strength, tinting power and more preferable to the covering power of substrate surface.
The present invention is further arranged to: the preparation step of the polyurethane-modified lotion of waterborne, polycarbonate is as follows:
S1, nitrogen is constantly passed through into DMAC, being heated to temperature is 70-80 DEG C；
S2, after the temperature of S1 is stablized, add catalyst into S2, reaction 5-7h；
S3,1,4-butanediol solution is added toward S2, stops heating after reaction 5-7h, stirred after then adding polycarbonate glycol
It is even to obtain the polyurethane-modified lotion of waterborne, polycarbonate.
By using above-mentioned technical proposal, it is found through experiment that, it is passed through nitrogen into DMAC, is heated to 70-80 DEG C, to
Temperature adds catalyst after stablizing, 1,4-butanediol solution is added after reacting 5-7h, stops heating after then reacting 5-7h, finally
Addition polycarbonate glycol stirs to get the polyurethane-modified lotion of waterborne, polycarbonate, will be obtained aqueous poly- through the above steps
Carbonate polyurethane modified emulsion is added in water paint, and test finds manufactured adherency of the water paint to plastic basis material surface
Property it is more preferable, when spraying, the air-flow that spray gun sprays is not easy to make not dry paint layer surface to form cloud decorative pattern, can to plastic basis material into
The spraying of row big flow, atmospheric pressure is conducive to improve spray painting efficiency, and the coating surface after spraying is smooth, paint layer aluminium powder arrangement effect
Fruit is good, and paint layer glossiness is good.Water paint forms a film paint layer harder, after spraying with heat-resisting, fast light, Bearable dry and wet wipe, the property such as wear-resisting
Energy.
The present invention is further arranged to: it is 20% that DMAC, which is made into volume fraction, before being passed through nitrogen toward DMAC in the S2
Aqueous solution.
By using above-mentioned technical proposal, it is found through experiment that, when DMAC is configured to the aqueous solution that volume fraction is 20%,
Made water paint is more preferable to the adhesiving effect on plastic basis material surface.
The present invention is further arranged to: the catalyst is the acetic acid for the dibutyl tin dilaurate that volume fraction is 0.1%
Ethyl ester solution.
By using above-mentioned technical proposal, it is found through experiment that, use volume fraction for 0.1% dibutyl tin dilaurate
Ethyl acetate solution as catalyst when, the adhesion property of manufactured water paint is more preferable, and spray after paint layer it is heat-resisting, it is resistance to
Light, Bearable dry and wet wipe, wear-resisting property are more preferable.
The present invention is further arranged to: the 1,4- butanediol solution is the aqueous solution that volume fraction is 20%.
By using above-mentioned technical proposal, it is found through experiment that, use volume fraction for 20% 1,4-butanediol aqueous solution
When, the adhesion property of manufactured water paint is more preferable, and when spraying, the air-flow that spray gun sprays is not easy to make not dry paint layer surface to form cloud
Damascene can carry out the spraying of big flow, atmospheric pressure to plastic basis material.
The present invention is further arranged to: the molar ratio of polycarbonate glycol and diisocyanate in the S1 is 1:1.
By using above-mentioned technical proposal, it is found through experiment that, when the molar ratio of polycarbonate glycol and diisocyanate is
When 1:1, reaction generates DMAC completely just for polycarbonate glycol and diisocyanate, and the DMAC of generation is conducive to improve water paint
To the adhesion property of plastic basis material.
The present invention is further arranged to: the N, and the molar ratio of N '-dimethyl acetamide and 1,4- butanediol is 1-2:1.
By using above-mentioned technical proposal, it is found through experiment that, when the molar ratio of DMAC and 1,4-butanediol is 1-2:1,
Contain a small amount of DMAC in the manufactured polyurethane-modified lotion of waterborne, polycarbonate, and tests discovery and added in water paint and contained
The polyurethane-modified lotion of the waterborne, polycarbonate of a small amount of DMAC, which is more advantageous to, improves water paint to the adhesion property of plastic basis material.
The present invention is further arranged to: a length of 8-10h when stirring in the S4.
By using above-mentioned technical proposal, it is found through experiment that, reagent reaction is more abundant when a length of 8-10h upon agitation, and
More evenly, property is more stable for reagent after stirring, is not susceptible to flocculation sedimentation, is conducive to extend the service life of water paint.
In conclusion the invention has the following advantages:
First, water paint of the invention keeps the paint layer glossiness after spraying good, floating phenomenon do not occur for paint layer, tinting strength, tinting power and
It is good to the covering power of substrate surface；
Second, water paint adhesive force of the invention is good, the Spray painting tool that oil paint can be used flows greatly plastic basis material surface
Amount, atmospheric pressure spraying, spray efficiency is high, and paint layer is good to the adhesive force of plastic basis material, and the workability of manufactured water paint is good.
Specific embodiment
Below with reference to table and embodiment, the present invention will be described in detail.
A kind of water paint, table 1 are that the parts by weight of each component contained by A product summarize in embodiment 1-9, B in embodiment 1-9
The parts by weight of product each component are 12.5 parts of aluminium powder, 12.5 parts of deionized water.
Table 1 summarizes to the parts by weight of each component contained by A product in embodiment 1-9
Wherein, orientation spreading agent includes cellulose, bentonite and deionized water.
Table 2 is the cellulose to the orientation spreading agent in embodiment 1 and embodiment 10-11: bentonite: the ratio of deionized water
Value summarizes, and wherein the parts by weight of other components in embodiment 10-11 and its component are same as Example 1.
Table 2 is to the cellulose in embodiment 1 and embodiment 10-11: bentonite: the remittance of the weight fraction ratio of deionized water
Always
The cellulose of embodiment 2-9 orientation spreading agent: bentonite: the parts by weight ratio of deionized water is same as Example 1.
Table 3 is summarized to the parts by weight ratio of A product and B product in embodiment 1 and embodiment 12-13, wherein embodiment
The parts by weight of A product in 12-13 and the component in B product and its component are same as Example 1.
Table 3 summarizes to the parts by weight ratio of embodiment 1 and embodiment 12-13A product and B product
The parts by weight ratio of A product and B product is same as Example 1 in embodiment 2-11.
Embodiment 14
A method of it is as follows to prepare the polyurethane-modified lotion of waterborne, polycarbonate, preparation step in 1 water paint of embodiment:
S1, based on molfraction, 1 part of polycarbonate glycol and 1 part of diisocyanate are mixed, DMAC is obtained；
S2, the DMAC of 1 molfraction is configured to the aqueous solution that volume fraction is 20%, nitrogen is constantly passed through into DMAC, is added
It is 70 DEG C that heat, which is warming up to temperature,；
S3, after S2 temperature stablize after, into S2 add volume fraction for 0.1% dibutyl tin dilaurate ethyl acetate
Solution is catalyzed, and 5h is reacted；
S4, the 1,4-butanediol aqueous solution that volume fraction is 20% is added toward S3, the molfraction of 1,4-butanediol is 1 part, reaction
Stop heating after 5h, then adding stirring 8h after the polycarbonate glycol of 1 molfraction, to obtain waterborne, polycarbonate polyurethane-modified
Lotion.
Embodiment 15
A method of it is as follows to prepare the polyurethane-modified lotion of waterborne, polycarbonate, preparation step in 1 water paint of embodiment:
S1, based on molfraction, 1 part of polycarbonate glycol and 1 part of diisocyanate are mixed, DMAC is obtained；
S2, the DMAC of 1.5 molfractions is configured to the aqueous solution that volume fraction is 20%, nitrogen is constantly passed through into DMAC,
Being heated to temperature is 75 DEG C；
S3, after S2 temperature stablize after, into S2 add volume fraction for 0.1% dibutyl tin dilaurate ethyl acetate
Solution is catalyzed, and 6h is reacted；
S4, the 1,4-butanediol aqueous solution that volume fraction is 20% is added toward S3, the molfraction of 1,4-butanediol is 1 part, reaction
Stop heating after 6h, then adds stirring 9h after the polycarbonate glycol of 0.5 molfraction and obtain waterborne, polycarbonate polyurethane and change
Property lotion.
Wherein, the preparation method of the polyurethane-modified lotion of waterborne, polycarbonate is identical as embodiment 15 in embodiment 2-13.
Embodiment 16
A method of it is as follows to prepare the polyurethane-modified lotion of waterborne, polycarbonate, preparation step in 1 water paint of embodiment:
S1, based on molfraction, 1 part of polycarbonate glycol and 1 part of diisocyanate are mixed, DMAC is obtained；
S2,2 parts of DMAC are configured to the aqueous solution that volume fraction is 20%, nitrogen, heat temperature raising is constantly passed through into DMAC
It is 80 DEG C to temperature；
S3, after S2 temperature stablize after, into S2 add volume fraction for 0.1% dibutyl tin dilaurate ethyl acetate
Solution is catalyzed, and 7h is reacted；
S4, the 1,4-butanediol aqueous solution that volume fraction is 20% is added toward S3, the molfraction of 1,4-butanediol is 1 part, reaction
Stop heating after 7h, then adds stirring 10h after the polycarbonate glycol of 1.5 molfractions and obtain waterborne, polycarbonate polyurethane and change
Property lotion.
Embodiment 17
A method of it is as follows to prepare the polyurethane-modified lotion of waterborne, polycarbonate, preparation step in 1 water paint of embodiment:
Embodiment 17 and embodiment 15 are the difference is that catalyst, and the catalyst of S3 addition is tin dilaurate in embodiment 17
Dibutyl tin reagent.
Comparative example
Comparative example 1
Comparative example 1 is difference from example 1 is that the parts by weight of the polyurethane-modified lotion of waterborne, polycarbonate are 45 parts.
Comparative example 2
Comparative example 2 is difference from example 1 is that the parts by weight of the polyurethane-modified lotion of waterborne, polycarbonate are 80 parts.
Comparative example 3
Comparative example 3 is difference from example 1 is that the weight fraction ratio of cellulose, bentonite and deionized water is 5:10:
40。
Comparative example 4
Comparative example 4 is difference from example 1 is that the weight fraction ratio of cellulose, bentonite and deionized water is 20:1:
40。
Comparative example 5
Comparative example 5 difference from example 1 is that comparative example 5 the polyurethane-modified lotion of waterborne, polycarbonate is changed to it is aqueous
Polyaminoester emulsion.
Comparative example 6
Comparative example 6 with embodiment 6 the difference is that comparative example 6 the polyurethane-modified lotion of waterborne, polycarbonate is changed to it is aqueous
Polyaminoester emulsion.
Comparative example 7
Comparative example 7 with embodiment 7 the difference is that comparative example 7 the polyurethane-modified lotion of waterborne, polycarbonate is changed to it is aqueous
Polyaminoester emulsion.
Comparative example 8
Comparative example 8 difference from example 1 is that comparative example 8 the polyurethane-modified lotion of waterborne, polycarbonate is changed to it is aqueous
Polyaminoester emulsion, and the parts by weight of the aqueous polyurethane emulsion of comparative example 8 are 45 parts.
Comparative example 9
Comparative example 9 difference from example 1 is that comparative example 9 the polyurethane-modified lotion of waterborne, polycarbonate is changed to it is aqueous
Polyaminoester emulsion, and the parts by weight of the aqueous polyurethane emulsion of comparative example 9 are 80 parts.
Application examples
A method of preparing the water paint of embodiment 1, comprising the following steps:
S1, raw material is weighed in parts by weight, B product are mixed evenly to obtain in aluminium powder and deionized water；
S2, coalescing agent and deionized water are added to after mixing in the polyurethane-modified lotion of waterborne, polycarbonate and divided
Dissipate, rate of dispersion 750r/min, when dispersion a length of 10min；
S3, S2 and wetting agent, defoaming agent, orientation spreading agent, levelling agent are mixed and stirred for uniformly；
S4, thickener is added into the mixed solution of S3, and stir evenly to obtain A product；
S5, water paint is mixed evenly to obtain in A product and B product.
Wherein, the preparation method phase of the preparation method with embodiment 1 of the water paint of embodiment 2-17 and comparative example 1-9
Together.
Performance test
Using the water paint of the preparation method preparation embodiment 1-17 and comparative example 1-9 of application examples, the water paint after preparation is adopted
Plastic basis material surface is sprayed with the spray gun of 1.5mm bore, it, will be at after 70 DEG C of oven cooking cycle 20min is put into after spraying
Product take out and carry out performance test below to paint layer.
1, appearance detects
Appearance of coat after observing the spraying of each embodiment and comparative example it is found that embodiment 1- embodiment 17 spray after paint layer surface
Glossiness is good, paint layer surface richness is high, and paint layer is without shrinkage cavity, volcanic crater and crack phenomenon；The paint layer surface of comparative example 1 occurs
The paint layer surface gloss of crack phenomenon, comparative example 2-4 is poor, and surface color is darker, and cloud and mist occurs in the paint layer surface of comparative example 5-7
Shape decorative pattern and surface silver powder floating, the cloud decorative pattern that the paint layer surface of comparative example 8 occurs is more than comparative example 5-7, comparative example 9
Paint layer surface occur cloud decorative pattern it is few compared with comparative example 5-7.
2, adhesion test
Environmental condition: 23.0 DEG C, 49.7%RH
Detecting instrument: cross-cut tester
Detection foundation: MTS-F03-03-003-B1-2016,4.4
Testing conditions: carrying out according to method as defined in VS-01.00-F-14008 " paint film adhesion test specification ", selects 3M610
Adhesive tape.
Criterion: as qualified without removing (100/100).
Testing result, discovery embodiment 1-17 is qualification without there is paint film peeling, testing result after testing.And it is right
There is paint film peeling, comparative example 9 and comparative example 3-4 without apparent paint film peeling in ratio 1-2 and comparative example 5-8.
3, impact resistance test
Detecting instrument: heavy shock machine
Detection foundation: MTS-F03-03-003-B1-2016,4.5
Testing conditions: ball requirement: quality 4.5kg, diameter 127mm, hardness (55-65) " A ", paint spray sample template die are intended in vehicle
The position of actual use falls ball according to the impact position respective heights of regulation.Components position: being lower than stringcourse, under
Drop height degree: 459-461mm.
Judgment criteria: exemplar flawless destroys and can complete to restore from impression, as qualified.
Testing result: through test it is found that embodiment 1-17 and comparative example 3-4 test after exemplar it is flawless, destroy and
It can complete to restore from impression, testing result is qualified.And there are a small number of crackles in comparative example 1-2 and comparative example 5-7, and paint film occurs
There is light spalling phenomenon, a small number of crackles occurs in comparative example 8-9, and paint film is without peeling phenomenon.
4, abrasion test
Environmental condition: 19.6 DEG C, 51.0%RH
Detecting instrument: rotary abrasion instrument
Detection foundation: MTS-F03-03-003-B1-2016,4.6
Testing conditions: it is carried out by SAE J948 method, using CS-10 grinding wheel, with the speed of (60 ± 2) rpm, the load friction of 5N
Sample board, Rubbing number 500 times.
Judgment criteria: paint film is without worn out as qualification after test.
Testing result: it is through examination it is found that not worn out after the paint film test of embodiment 1-17, comparative example 2-4 and comparative example 9,
Testing result is qualification.The paint film of comparative example 1 and comparative example 5-8 are worn through.
5, high-low temperature resistant cyclic test
Test apparatus: constant temperature humidity chamber, Grossmeters
Detection foundation: MTS-F03-03-003-B1-2016,4.20
Testing conditions:
(1), -30 DEG C ± 2 DEG C, 5h → 23 DEG C ± 2 DEG C, (50 ± 3) %RH, 0.5h → 90 DEG C, 5h → 23 DEG C ± 2 DEG C, (50 ± 3) %
RH, 0.5h → 50 DEG C ± 2 DEG C, (95 ± 3) %RH, 2h → 23 DEG C ± 2 DEG C, (50 ± 3) %RH, 0.5h → 30 DEG C ± 2 DEG C, 5h → 23
DEG C ± 2 DEG C, (50 ± 3) %RH, 0.5h → 90 DEG C, 5h → 23 DEG C ± 2 DEG C, (50 ± 3) %RH, 0.5h.Cycle-index: 1 time.Observation
Whether there are cracks for surface of the paint film, blistering variation, evaluates color change according to GB/T250 prescriptive procedure, tests gloss according to GB 9754
Degree variation.
(2), (20 μ s/cm of conductivity or less) carries out immersion test for 24 hours in the deionized water of (40 ± 1) DEG C, paint film without
Blistering, ruckbildung, secondary adhesive force free of losses.
Judgment criteria: surface of the paint film flawless, blistering, peeling and other film defects；Gray scale opinion rating >=4 grade；Light
Damp degree variation≤25%；Secondary adhesive force (25/25) is qualified；Water logging evaluation: secondary adhesive force (25/25) is qualified after water logging, paint film
Without blistering and ruckbildung.
Testing result: it is found through experiment that the surface of the paint film flawless of embodiment 1-17, blistering, peeling and other paint films lack
It falls into；Exemplar gray scale opinion rating is 5 grades；Glossiness changes between 5.08%-9.5%；Secondary adhesive force (25/25) is qualified；Water
Leaching evaluation: secondary adhesive force (25/25) is qualified after water logging, and paint film is without blistering and ruckbildung.Therefore the resistance to height of embodiment 1-17
Low-temperature circulating pass the test.And there is the phenomenon that different degrees of cracks blistering, paint film spalling in the surface of the paint film of comparative example 1-4；
4 grades of cyclic test of exemplar tonal gradation high-low temperature resistant, also compared with embodiment height, secondary adhesive force and water logging evaluation are equal for glossiness variation
It is unqualified.
Using the water paint of the preparation method preparation embodiment 1 of application examples, embodiment 6 and 7 and comparative example 5-9, will prepare
Water paint afterwards sprays plastic basis material surface using the spray gun of 1.8mm bore, and 70 DEG C of oven cooking cycle is put into after spraying
After 20min, finished product is taken out, and paint layer surface is observed.
Observe result: the paint layer surface gloss of embodiment 1 is good, surface without apparent cloud decorative pattern, embodiment 6-7's
There is a small amount of cloud decorative pattern in paint layer surface, and paint layer surface gloss is poor compared with embodiment 1, and the surface of comparative example 5-9 occurs bright
Aobvious cloud decorative pattern, and the paint layer appearance of comparative example 9 does not parch the phenomenon that accumulating paint layer from surface completely.
In summary, water paint of the invention is more preferable to the adhesiveness on plastic basis material surface, when spraying, gas that spray gun sprays
Stream is not easy to make not dry paint layer surface to form cloud decorative pattern, the spraying of big flow, atmospheric pressure can be carried out to plastic basis material, favorably
In improving efficiency of painting, the coating surface after spraying is smooth, and paint layer aluminium powder arrangement effect is good, and paint layer glossiness is good.It is aqueous to paint
Film is harder, the paint layer after spraying has heat-resisting, fast light, Bearable dry and wet wipe, the performances such as wear-resisting.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of water paint, which is characterized in that including A product and B product, the A product include the component of following parts by weight: aqueous poly-
50-75 parts of carbonate polyurethane modified emulsion, 5-10 parts of coalescing agent, 5-10 parts of deionized water, 1-4 parts of wetting agent, defoaming agent
1-2 parts, orientation spreading agent 5-15 parts, 1-2 parts of levelling agent, 2-5 parts of association thickener；The B product include following parts by weight
Component: 10-15 parts of aluminium powder, 10-15 parts of deionized water；
The weight fraction ratio of the A product and B product is A:B=4-6:14-17.
2. a kind of water paint according to claim 1, which is characterized in that the orientation spreading agent is by cellulose, bentonite
It is formed with deionized water, the weight fraction ratio of the cellulose, bentonite and deionized water is 8-16:3-8:40.
3. a kind of water paint according to claim 1, which is characterized in that the polyurethane-modified lotion of waterborne, polycarbonate
Preparation step it is as follows:
S1, nitrogen is constantly passed through into DMAC, being heated to temperature is 70-80 DEG C；
S2, after the temperature of S1 is stablized, add catalyst into S2, reaction 5-7h；
S3,1,4-butanediol solution is added toward S2, stops heating after reaction 5-7h, stirred after then adding polycarbonate glycol
It is even to obtain the polyurethane-modified lotion of waterborne, polycarbonate.
4. a kind of water paint according to claim 3, which is characterized in that by DMAC before being passed through nitrogen toward DMAC in the S2
It is made into the aqueous solution that volume fraction is 20%.
5. a kind of water paint according to claim 3, which is characterized in that the catalyst is two that volume fraction is 0.1%
The ethyl acetate solution of dibutyl tin laurate.
6. a kind of water paint according to claim 3, which is characterized in that the 1,4-butanediol solution is that volume fraction is
20% aqueous solution.
7. a kind of water paint according to claim 3, which is characterized in that polycarbonate glycol and two isocyanides in the S1
The molar ratio of acid esters is 1:1.
8. a kind of water paint according to claim 3, which is characterized in that the N, N '-dimethyl acetamide and Isosorbide-5-Nitrae-fourth
The molar ratio of glycol is 1-2:1.
9. a kind of water paint according to claim 3, which is characterized in that a length of 8-10h when being stirred in the S4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810407982.4A CN110437717A (en) | 2018-05-02 | 2018-05-02 | A kind of water paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810407982.4A CN110437717A (en) | 2018-05-02 | 2018-05-02 | A kind of water paint |
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| CN110437717A true CN110437717A (en) | 2019-11-12 |
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| CN107384170A (en) * | 2017-07-27 | 2017-11-24 | 滁州金桥德克新材料有限公司 | It is a kind of aluminum paint, aqueous and preparation method thereof |
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