CN108165155A - A kind of environment-friendly type aqueous double-component polyurethane coating and preparation method thereof - Google Patents
A kind of environment-friendly type aqueous double-component polyurethane coating and preparation method thereof Download PDFInfo
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- CN108165155A CN108165155A CN201711493510.7A CN201711493510A CN108165155A CN 108165155 A CN108165155 A CN 108165155A CN 201711493510 A CN201711493510 A CN 201711493510A CN 108165155 A CN108165155 A CN 108165155A
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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
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a kind of environment-friendly type aqueous double-component polyurethane coatings and preparation method thereof, and the polyurethane coating is by mass ratio（2.7‑3.0）：（0.9‑1.0）Component A and B component composition；By weight percentage, component A includes hydroxyl acrylic aqueous dispersion I 35% ~ 40%, hydroxyl acrylic aqueous dispersion II 20% ~ 24%, antifoaming agent 0.2% ~ 1.0%, dipropylene 2.0% ~ 3.0%, butyl glycol ether 2.0% ~ 3.0%, levelling agent 0.2% ~ 1.0%, mill base 15% ~ 38%, thickener 0.1% ~ 0.3%；B component includes propylene-glycol diacetate 30% ~ 33%, polyurethane curing agent I 43% ~ 49%, polyurethane curing agent II 18% ~ 24%.Gained aqueous double-component polyurethane coating of the invention has physical mechanical properties and water resistance, salt fog resistance, humidity resistance and the ageing-resistant performances such as preferable hardness, wearability, flexibility.
Description
Technical field
The invention belongs to technical field of environmental protection paint, and in particular to a kind of environment-friendly type aqueous double-component polyurethane coating and its
Preparation method.
Background technology
With people's environmental protection, the enhancing of consciousness, particularly various countries' environmental regulation is to organic volatile in coating system
(VOC) the stringent limitation of content promotes the development for the low-contamination type coating that water paint is representative, aqueous polyurethane coating
The VOC that hardness is high, adhesive force is good, erosion resistant, solvent resistance is good, the advantages that having excellent weather resistance and aqueous polyurethane coating are relatively low contains
Amount is combined, and polyether polyols have building materials, using molecular design theory, with reference to new synthesis and crosslinking technological, energy
The effectively the Nomenclature Composition and Structure of Complexes of control film-coating polymer makes aqueous polyurethane film performance be equivalent to even better than traditional solvent-borne painting
Material, becomes one of coating variety with fastest developing speed, wherein Aqueous acrylic urethane because have low film-forming temperature, strong adhesive force,
Wearability is good, hardness is high and the superior performance such as chemical-resistant, good weatherability and be widely used；But water soluble acrylic acid gathers
Hydroxy component molecular weight is small in urethane coating, and drying time is long；- NCO and H2O reaction productions CO2Paint film is caused bubble easily occur.
Invention content
The present invention provides a kind of poly- ammonia of environment-friendly type aqueous two-component to overcome the above problem of the existing technology
Ester paint and preparation method thereof.
Technical scheme is as follows：
A kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component, the quality of A components and B component
It matches as (2.7-3.0)：(0.9-1.0).
The component A by weight percentage, is divided including hydroxyl acrylic aqueous dispersion I 35%~40%, hydroxy acrylic acid
Granular media II 20%~24%, antifoaming agent 0.2%~1.0%, dipropylene 2.0%~3.0%, butyl glycol ether 2.0%
~3.0%, levelling agent 0.2%~1.0%, mill base 15%~38%, thickener 0.1%~0.3%；
The B component by weight percentage, including propylene-glycol diacetate 30%~33%, polyurethane curing agent I
43%~49%, polyurethane curing agent II 18%~24%.
Hydroxy radical content is 3.0~3.8wt% in the hydroxyl acrylic aqueous dispersion I, non-volatile part content for 45~
50wt%.
Hydroxy radical content is 3.8~4.1wt% in the hydroxyl acrylic aqueous dispersion II, non-volatile part content for 45~
50wt%.
The antifoaming agent is non-volatile part content>The polysiloxane hydrophobic particle antifoaming agent of 98wt%.
The levelling agent is ionic acrylic copolymer levelling agent, and the ionic acrylic copolymer levelling agent is not
Volatile content is 40-60wt%
The mill base is water-borne polyurethane color paste, specially white slurry, black wash, blue slurry, yellow slurry, one kind in red slurry or more
Kind.
When choosing a kind of in the white slurry, black wash, blue slurry, yellow slurry, red slurry, the dosage starched in vain is 30~36wt%；It is black
The dosage of slurry is 12~17wt%；The dosage of indigo plant slurry is 20~26wt%；The dosage of Huang slurry is 34~38wt%；The use of red slurry
It measures as 25~30wt%.
The thickener be polyurethane associative thickener, non-volatile part content of the polyurethane associative thickener
25-40wt%.
The polyurethane curing agent I is HDI type curing agent, and non-volatile part content of the HDI types curing agent is
100wt%；Polyurethane curing agent II is IPDI type curing agent, the non-volatile part content of IPDI type curing agent for 70~
100wt%.
The preparation method of the environment-friendly type aqueous double-component polyurethane coating, includes the following steps：
1) component A is prepared：
The hydroxyl acrylic aqueous dispersion of formula ratio I, hydroxyl acrylic aqueous dispersion II are added in clean scuffing of cylinder bore first,
The mill base of formula ratio is added under stirring condition, after stirring evenly, then be separately added into the antifoaming agent of formula ratio, dipropylene,
Butyl glycol ether and levelling agent stir 10-20 minutes, are eventually adding the thickener adjustment viscosity of formula ratio, stir evenly to obtain the final product
Component A in environment-friendly type aqueous double-component polyurethane coating；
2) B component is prepared：
Under stirring at low speed, added in successively into reaction kettle the propylene-glycol diacetate of formula ratio, polyurethane curing agent I,
Polyurethane curing agent II simultaneously controls charging time in 30 minutes, into reaction kettle full of stirring is opened after nitrogen, stirs 10
To get the B component in environment-friendly type aqueous double-component polyurethane coating after~15 minutes；
3) by B component obtained by component A obtained by step 1) and step 2) in mass ratio (2.7-3.0)：The ratio of (0.9-1.0)
Example mixing.
The present invention has the following advantages：
Hydroxyl acrylic aqueous dispersion used in the present invention and the compatibility of curing agent of the low viscosity containing isocyanates are good, system
Preparation Method is simple, easy for construction；And the cosolvent of different rate of volatilizations is selected, the open hour of paint film are improved, conducive to bubble
Volatilization, ensure that the quality of paint film；And it can be widely applied to various car surfaces, passenger car, locomotive head, electric power and set
Standby, automobile component, instrument and meter, etc. the more demanding mechanical surface of dicorations, weatherability application and protection.
Specific embodiment
Embodiment 1
A kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component, the quality of A components and B component
It matches as (2.7-3.0)：(0.9-1.0).
The component A by weight percentage, is divided including hydroxyl acrylic aqueous dispersion I 35%~40%, hydroxy acrylic acid
Granular media II 20%~24%, antifoaming agent 0.2%~1.0%, dipropylene 2.0%~3.0%, butyl glycol ether 2.0%
~3.0%, levelling agent 0.2%~1.0%, mill base 15%~38%, thickener 0.1%~0.3%；
The B component by weight percentage, including propylene-glycol diacetate 30%~33%, polyurethane curing agent I
43%~49%, polyurethane curing agent II 18%~24%.
The present invention adds the pigment having excellent weather resistance, auxiliary agent (antifoaming agent, stream using water based acrylic resin as base-material
Flat agent, thickener) and cosolvent (dipropylene, butyl glycol ether) be component A, with aliphatic isocyanates curing agent and
Solvent (propylene-glycol diacetate) is the high-quality dual-component polyurethane finishing coat of B component composition, using preceding first by above-mentioned formula point
Component A, B component are not prepared, then mixes component A and B component in defined ratio, and working viscosity is diluted to deionized water
It uses afterwards.
Embodiment 2
On the basis of embodiment 1, hydroxy radical content is 3.0~3.8wt% in the hydroxyl acrylic aqueous dispersion I, is not waved
It is 45~50wt% to send out part content；Such as using the A2470 hydroxyl acrylic aqueous dispersions of Cohan wound Science and Technology Ltd. production, Wan Hua
2033 hydroxyl acrylic aqueous dispersions of chemical groups limited company production；Hydroxyl contains in the hydroxyl acrylic aqueous dispersion II
It measures as 3.8~4.1wt%, non-volatile part content is 45~50wt%；Such as using the A2646 of Cohan wound Science and Technology Ltd. production
Hydroxyl acrylic aqueous dispersion, 5286 hydroxyl acrylic aqueous dispersions of Shanghai Huarong Chemical Co., Ltd..
The hydroxyl acrylic aqueous dispersion I can provide excellent glossiness, chemicals-resistant and weatherability；The hydroxy
Sour dispersion II can provide excellent gloss and mechanical performance, while have prominent water resistance.
The antifoaming agent is non-volatile part content>The polysiloxane hydrophobic particle antifoaming agent of 98wt%, such as BYK-022 (works
Bi Ke companies of industry grade Germany), BYK-093 (Bi Ke companies of technical grade Germany).
The levelling agent is ionic acrylic copolymer levelling agent, and the ionic acrylic copolymer levelling agent is not
Volatile content is 40-60wt%, such as levelling agent TEGO-450 (technical grade TEG Di Gao companies), BYK-381 (technical grade Germany
Bi Ke companies).
The mill base is aqueous polyurethane (WPU) mill base, specially WPU is starched in vain, WPU black wash, WPU indigo plants slurry, WPU Huangs are starched,
It is one or more in the red slurries of WPU；When choosing, WPU is starched in vain, WPU black wash, WPU indigo plants slurry, WPU Huangs are starched, one kind in the red slurries of WPU
When, it is 30~36 weight % that solid part weight percent, which is the dosage that 75%, WPU is starched in vain, during the WPU is starched in vain；In WPU black wash
Solid part weight percent is that the dosage of 15%, WPU black wash is 12~17 weight %；Solid part weight percent in WPU indigo plants slurry
Dosage for 45%, WPU indigo plants slurry is 20~26 weight %；Solid part weight percent is starched for 55%, WPU Huangs in WPU Huangs slurry
Dosage be 34~38 weight %；It is 25~30 weights that solid part weight percent, which is the dosage of the red slurries of 50%, WPU, in the red slurries of WPU
Measure %；The covering power highest of color, dosage are fewer.
The thickener be polyurethane associative thickener, non-volatile part content of the polyurethane associative thickener
25-40wt%, such as 0620 thickener of product that OMG companies of the U.S. produce, 299 thickener of product of this company of hamming production.
The polyurethane curing agent I is HDI type curing agent, and non-volatile part content of the HDI types curing agent is
100wt%, it is possible to provide high richness, high glaze, 2655 curing agent of XP produced such as Cohan wound Science and Technology Ltd., 3900
Curing agent, 278 curing agent of Wanhua Chemical Group Co., Ltd.'s production；
Polyurethane curing agent II is IPDI type curing agent, the non-volatile part content of IPDI type curing agent for 70~
100wt%, it is possible to provide good chemical-resistant and weatherability, the 401-70 curings produced such as Cohan wound Science and Technology Ltd.
Agent.
Embodiment 3
On the basis of above-described embodiment, the preparation method of the environment-friendly type aqueous double-component polyurethane coating, including
Following steps：
1) component A is prepared：
WPU colors mill bases are checked and accepted according to the requirement of job instruction and internal control index first, items for acceptance includes：Quantity,
Then color, fineness, viscosity, solid part etc. add the hydroxyl acrylic aqueous dispersion of formula ratio I, hydroxyl acrylic aqueous dispersion II
Enter into clean scuffing of cylinder bore, add in the mill base of formula ratio under agitation, after stirring evenly, then be separately added into the defoaming of formula ratio
Agent, dipropylene (DPNB), butyl glycol ether (EB) and levelling agent stir 10-20 minutes, are eventually adding formula ratio
Thickener adjusts viscosity, stirs evenly up to the component A in environment-friendly type aqueous double-component polyurethane coating；
2) B component is prepared：
Nitrogen is filled with into reaction kettle first about 2-3 minutes, discharges the air in reaction kettle, then under stirring at low speed,
Successively into reaction kettle add in formula ratio solvent (propylene-glycol diacetate), curing agent (I+polyurethane of polyurethane curing agent is solid
Agent II) and starting and end time (charging time must be controlled in 30 minutes) is recorded, nitrogen is full of into reaction kettle
Gas opens stirring, to get the poly- ammonia of environment-friendly type aqueous two-component after being stirred 10~15 minutes under 500-600 revs/min of rotating speed
B component in ester paint；
3) by B component obtained by component A obtained by step 1) and step 2) in mass ratio (2.7-3.0)：The ratio of (0.9-1.0)
Example mixing.
Embodiment 4
A kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component；
The component A by weight percentage, includes the A2470 hydroxyls third of 40% Cohan wound Science and Technology Ltd. production
Olefin(e) acid dispersion, the A2646 hydroxyl acrylic aqueous dispersions of 20% Cohan wound Science and Technology Ltd. production, 0.2% antifoaming agent
BYK-093,2.0% dipropylene, 2.0% butyl glycol ether, 0.2% levelling agent TEGO-450,35.5%
WPU is starched in vain, 0.1% thickener OMG 0620；
The B component is by weight percentage, limited including 30% propylene-glycol diacetate, 49% Cohan wound science and technology
2655 curing agent of XP of company's production and the 401-70 curing agent of 21% Cohan wound Science and Technology Ltd. production.
The preparation method of environment-friendly type aqueous double-component polyurethane coating, includes the following steps described in the present embodiment：
1) component A is prepared：
It checks and accepts WPU according to the requirement of job instruction and internal control index first to starch in vain, items for acceptance includes：Quantity, color,
Fineness, viscosity, solid part etc.；Then by the A2470 hydroxyl acrylic aqueous dispersions of formula ratio, A2646 hydroxyl acrylic aqueous dispersions
It being added in clean scuffing of cylinder bore, the WPU that formula ratio is added under 500-600 revs/min of rotating speed is starched in vain, after stirring evenly,
BYK-093, DPNB, EB of formula ratio and levelling agent TEGO-450 are added under 500-600 revs/min of rotating speed, stirs 10-20
Minute, the thickener OMG 0620 for being eventually adding formula ratio adjusts viscosity, stirs evenly up to the poly- ammonia of environment-friendly type aqueous two-component
Component A in ester paint；
2) B component is prepared：
Nitrogen is filled with into reaction kettle first about 2-3 minutes, discharges the air in reaction kettle, then under stirring at low speed,
Propylene-glycol diacetate, 2655 curing agent of XP, 401-70 curing agent and the record for adding in formula ratio into reaction kettle successively are opened
Begin time and end time (charging time must be controlled in 30 minutes), stirring is opened full of nitrogen into reaction kettle,
To get the B groups in environment-friendly type aqueous double-component polyurethane coating after being stirred 10~15 minutes under 500-600 revs/min of rotating speed
Point；
3) by component A obtained by step 1) and B component in mass ratio 2.7 obtained by step 2)：0.9 ratio mixing.
Embodiment 5
A kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component, component A percentage by weight
Than meter, 2033 hydroxyl acrylic aqueous dispersions, 24% Shanghai including the production of 35% Wanhua Chemical Group Co., Ltd.
5286 hydroxyl acrylic aqueous dispersions of Huarong Chemical Co., Ltd., 1.0% antifoaming agent BYK-022,3.0% dipropylene glycol
Butyl ether (DPNB), 3.0% butyl glycol ether (EB), 1.0% levelling agent BYK-381,32.7% WPU are starched in vain, 0.3%
Hamming this thickener 299；
The B component by weight percentage, including 33% propylene-glycol diacetate, the ten thousand of 43% magnificent chemical groups stocks
278 curing agent of part Co., Ltd and the 401-70 curing agent of 24% Cohan wound Science and Technology Ltd. production.
The preparation method of environment-friendly type aqueous double-component polyurethane coating, includes the following steps described in the present embodiment：
1) component A is prepared：
It checks and accepts WPU according to the requirement of job instruction and internal control index first to starch in vain, items for acceptance includes：Quantity, color,
Fineness, viscosity, solid part etc.；Then 2033 hydroxyl acrylic aqueous dispersions of formula ratio, 5286 hydroxyl acrylic aqueous dispersions are added
Enter into clean scuffing of cylinder bore, the WPU that formula ratio is added under 500-600 revs/min of rotating speed is starched in vain, after stirring evenly, in 500-
BYK-022, DPNB, EB and BYK-381 of formula ratio are added under 600 revs/min of rotating speed, stirs 10-20 minutes, finally adds
Enter the hamming of formula ratio this thickener 299 adjustment viscosity, stir evenly up in environment-friendly type aqueous double-component polyurethane coating
Component A；
2) B component is prepared：
Nitrogen is filled with into reaction kettle first about 2-3 minutes, discharges the air in reaction kettle, then under stirring at low speed,
When the propylene-glycol diacetate of formula ratio, 278 curing agent, 401-70 curing agent are added in into reaction kettle successively and recording beginning
Between and the end time (charging time must be controlled in 30 minutes), into reaction kettle full of nitrogen open stirring, in 500-600
Rev/min rotating speed under stir 10~15 minutes after to get the B component in environment-friendly type aqueous double-component polyurethane coating；
3) by component A obtained by step 1) and B component in mass ratio 3.0 obtained by step 2)：1.0 ratio mixing.
Embodiment 6
A kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component, component A percentage by weight
Than meter, 2033 hydroxyl acrylic aqueous dispersions, 22% Cohan including the production of 35% Wanhua Chemical Group Co., Ltd.
The A2646 hydroxyl acrylic aqueous dispersions of wound Science and Technology Ltd. production, 1.0% antifoaming agent BYK-022,1.5% dipropyl two
Alcohol butyl ether, 1.5% butyl glycol ether, 0.8% levelling agent BYK-381,38% WPU Huangs slurry, 0.2% thickener OMG
0620；
The B component is by weight percentage, limited including 33% propylene-glycol diacetate, 49% Cohan wound science and technology
2655 curing agent of XP of company's production and the 401-70 curing agent of 18% Cohan wound Science and Technology Ltd. production.
The preparation method of environment-friendly type aqueous double-component polyurethane coating, includes the following steps described in the present embodiment：
1) component A is prepared：
WPU Huangs slurry is checked and accepted according to the requirement of job instruction and internal control index first, items for acceptance includes：Quantity, color,
Fineness, viscosity, solid part etc.；Then by 2033 hydroxyl acrylic aqueous dispersions of formula ratio, A2646 hydroxyl acrylic aqueous dispersions
It is added in clean scuffing of cylinder bore, the WPU Huangs slurry of formula ratio is added under 500-600 revs/min of rotating speed, after stirring evenly,
BYK-022, DPNB, EB and BYK-381 of addition formula ratio under 500-600 revs/min of rotating speed, stirring 10-20 minutes, most
The thickener OMG 0620 for adding in formula ratio afterwards adjusts viscosity, stirs evenly up to environment-friendly type aqueous double-component polyurethane coating
In component A；
2) B component is prepared：
Nitrogen is filled with into reaction kettle first about 2-3 minutes, discharges the air in reaction kettle, then under stirring at low speed,
Propylene-glycol diacetate, 2655 curing agent of XP, the 401-70 curing agent of formula ratio are added in into reaction kettle successively, and records and opens
Begin time and end time (charging time must be controlled in 30 minutes), stirring is opened full of nitrogen into reaction kettle,
To get the B groups in environment-friendly type aqueous double-component polyurethane coating after being stirred 10~15 minutes under 500-600 revs/min of rotating speed
Point；
3) by component A obtained by step 1) and B component in mass ratio 2.85 obtained by step 2)：0.95 ratio mixing.
Embodiment 7
A kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component, component A percentage by weight
Than meter, include A2470 hydroxyl acrylic aqueous dispersions, the 24% Shanghai Huarong of the production of 37.5% Cohan wound Science and Technology Ltd.
5286 hydroxyl acrylic aqueous dispersions of Chemical Co., Ltd., 0.6% antifoaming agent BYK-093,2.0% dipropylene,
3.0% butyl glycol ether, 0.6% levelling agent TEGO-450,32% WPU are starched in vain, 0.3% hamming this thickener
299；
The B component by weight percentage, the Cohan wound section including 31.5% propylene-glycol diacetate, 45.5%
2655 curing agent of XP of skill Co., Ltd production and the 401-70 curing agent of 23% Cohan wound Science and Technology Ltd. production.
The preparation method of environment-friendly type aqueous double-component polyurethane coating, includes the following steps described in the present embodiment：
1) component A is prepared：
It checks and accepts WPU according to the requirement of job instruction and internal control index first to starch in vain, items for acceptance includes：Quantity, color,
Fineness, viscosity, solid part etc.；Then by the A2470 hydroxyl acrylic aqueous dispersions of formula ratio, 5286 hydroxyl acrylic aqueous dispersions
It being added in clean scuffing of cylinder bore, the WPU that formula ratio is added under 500-600 revs/min of rotating speed is starched in vain, after stirring evenly,
BYK-093, DPNB, EB of formula ratio and levelling agent TEGO-450 are added under 500-600 revs/min of rotating speed, stirs 10-20
Minute, the hamming of formula ratio this thickener 299 adjustment viscosity is eventually adding, is stirred evenly up to the poly- ammonia of environment-friendly type aqueous two-component
Component A in ester paint；
2) B component is prepared：
Nitrogen is filled with into reaction kettle first about 2-3 minutes, discharges the air in reaction kettle, then under stirring at low speed,
Propylene-glycol diacetate, 2655 curing agent of XP, the 401-70 curing agent of formula ratio are added in into reaction kettle successively, and records and opens
Begin time and end time (charging time must be controlled in 30 minutes), stirring is opened full of nitrogen into reaction kettle,
To get the B groups in environment-friendly type aqueous double-component polyurethane coating after being stirred 10~15 minutes under 500-600 revs/min of rotating speed
Point；
3) by component A obtained by step 1) and B component in mass ratio 2.8 obtained by step 2)：0.9 ratio mixing.
Embodiment 8
A kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component, component A percentage by weight
Than meter, 2033 hydroxyl acrylic aqueous dispersions, 23% Shanghai including the production of 40% Wanhua Chemical Group Co., Ltd.
5286 hydroxyl acrylic aqueous dispersions of Huarong Chemical Co., Ltd., 0.8% antifoaming agent BYK-093,3.0% dipropylene glycol
The red slurry of butyl ether, 3.0% butyl glycol ether, 1.0% levelling agent BYK-381,29% WPU, 0.2% thickener OMG
0620；
The B component is by weight percentage, limited including 32% propylene-glycol diacetate, 46% Cohan wound science and technology
2655 curing agent of XP of company's production and the 401-70 curing agent of 22% Cohan wound Science and Technology Ltd. production.
The preparation method of environment-friendly type aqueous double-component polyurethane coating, includes the following steps described in the present embodiment：
1) component A is prepared：
The red slurries of WPU are checked and accepted according to the requirement of job instruction and internal control index first, items for acceptance includes：Quantity, color,
Fineness, viscosity, solid part etc.；Then 2033 hydroxyl acrylic aqueous dispersions of formula ratio, 5286 hydroxyl acrylic aqueous dispersions are added
Enter into clean scuffing of cylinder bore, the red slurries of WPU of formula ratio are added under 500-600 revs/min of rotating speed, after stirring evenly, in 500-
BYK-093, DPNB, EB and BYK-381 of formula ratio are added under 600 revs/min of rotating speed, stirs 10-20 minutes, finally adds
The thickener OMG 0620 for entering formula ratio adjusts viscosity, stirs evenly up to the A in environment-friendly type aqueous double-component polyurethane coating
Component；
2) B component is prepared：
Nitrogen is filled with into reaction kettle first about 2-3 minutes, discharges the air in reaction kettle, then under stirring at low speed,
Propylene-glycol diacetate, 2655 curing agent of XP, the 401-70 curing agent of formula ratio are added in into reaction kettle successively, and records and opens
Begin time and end time (charging time must be controlled in 30 minutes), stirring is opened full of nitrogen into reaction kettle,
To get the B groups in environment-friendly type aqueous double-component polyurethane coating after being stirred 10~15 minutes under 500-600 revs/min of rotating speed
Point；
3) by component A obtained by step 1) and B component in mass ratio 2.9 obtained by step 2)：1.0 ratio mixing.
Embodiment 9
According to more than factory formula and technique productions, aqueous polyurethane coating can be made, the technology detection of coating can reach
Following technical merit：
The B component of the present invention using being hydrophilic modifying aliphatic isocyanates, with component A used in hydroxy acrylic acid disperse
The compatibility of body is good, and selects the cosolvent of different rate of volatilizations, improves the open hour of paint film, conducive to waving for bubble
Hair, ensure that the quality of paint film；Gained aqueous double-component polyurethane coating of the invention has preferable hardness, wearability, flexible
Physical mechanical properties and water resistance, salt fog resistance, humidity resistance and the ageing-resistant performances such as property；It can be widely applied to various automobiles
Surface, passenger car, locomotive head, power equipment, automobile component, instrument and meter, etc. the more demanding machine of dicorations, weatherability
The application and protection on tool surface.
Chemical reagent and raw material according to the present invention can directly be bought from the market.
Claims (10)
1. a kind of environment-friendly type aqueous double-component polyurethane coating, is made of component A and B component, it is characterised in that：Component A and B groups
The quality proportioning divided is (2.7-3.0)：(0.9-1.0)；
The component A by weight percentage, including hydroxyl acrylic aqueous dispersion I 35%~40%, hydroxyl acrylic aqueous dispersion
II 20%~24%, antifoaming agent 0.2%~1.0%, dipropylene 2.0%~3.0%, butyl glycol ether 2.0%~
3.0%th, levelling agent 0.2%~1.0%, mill base 15%~38%, thickener 0.1%~0.3%；
The B component by weight percentage, including propylene-glycol diacetate 30%~33%, polyurethane curing agent I 43%~
49%th, polyurethane curing agent II 18%~24%.
2. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 1, it is characterised in that：The hydroxyl third
Hydroxy radical content is 3.0~3.8wt% in olefin(e) acid dispersion I, and non-volatile part content is 45~50wt%.
3. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 1, it is characterised in that：The hydroxyl third
Hydroxy radical content is 3.8~4.1wt% in olefin(e) acid dispersion II, and non-volatile part content is 45~50wt%.
4. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 1, it is characterised in that：The antifoaming agent
For non-volatile part content>The polysiloxane hydrophobic particle antifoaming agent of 98wt%.
5. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 1, it is characterised in that：The levelling agent
For ionic acrylic copolymer levelling agent, non-volatile part content of the ionic acrylic copolymer levelling agent is 40-
60wt%.
6. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 1, it is characterised in that：The mill base is
Water-borne polyurethane color paste, specially white slurry, black wash, blue slurry, Huang are starched, are in red slurry one or more.
7. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 6, it is characterised in that：It chooses described white
During a kind of in slurry, black wash, blue slurry, yellow slurry, red slurry, the dosage starched in vain is 30~36wt%；The dosage of black wash for 12~
17wt%；The dosage of indigo plant slurry is 20~26wt%；The dosage of Huang slurry is 34~38wt%；The dosage of red slurry is 25~30wt%.
8. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 1, it is characterised in that：The thickener
For polyurethane associative thickener, non-volatile part content 25-40wt% of the polyurethane associative thickener.
9. a kind of environment-friendly type aqueous double-component polyurethane coating according to claim 1, it is characterised in that：The polyurethane
Curing agent I is HDI type curing agent, and non-volatile part content of the HDI types curing agent is 100wt%；Polyurethane curing agent II is
IPDI type curing agent, the non-volatile part content of IPDI type curing agent are 70~100wt%.
10. a kind of preparation method of the environment-friendly type aqueous double-component polyurethane coating of claim 1-9 any one of them, feature
It is, includes the following steps：
1) prepared by component A：
The hydroxyl acrylic aqueous dispersion of formula ratio I, hydroxyl acrylic aqueous dispersion II are added in clean scuffing of cylinder bore first, stirred
Under the conditions of add in formula ratio mill base, after stirring evenly, then be separately added into the antifoaming agent, dipropylene, second two of formula ratio
Alcohol butyl ether and levelling agent stir 10-20 minutes, are eventually adding the thickener adjustment viscosity of formula ratio, stir evenly up to environmental protection
Component A in type aqueous double-component polyurethane coating；
2) prepared by B component：
Under stirring at low speed, propylene-glycol diacetate, polyurethane curing agent I, the poly- ammonia of formula ratio are added in into reaction kettle successively
Ester curing agent II simultaneously controls charging time in 30 minutes, into reaction kettle full of stirring is opened after nitrogen, stirs 10~15
To get the B component in environment-friendly type aqueous double-component polyurethane coating after minute；
3) by B component obtained by component A obtained by step 1) and step 2) in mass ratio (2.7-3.0)：The ratio of (0.9-1.0) is mixed
It closes.
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| CN109913110A (en) * | 2019-03-22 | 2019-06-21 | 东莞东萌化工有限公司 | A kind of environment-friendly type aqueous double-component polyurethane coating and preparation method thereof |
| CN110218511A (en) * | 2019-04-29 | 2019-09-10 | 上海立邦长润发涂料有限公司 | A kind of anti-aqueous double-component Brilliant white paint and its preparation process that heat rash appears |
| CN110305575A (en) * | 2019-07-15 | 2019-10-08 | 青岛大学 | A kind of double-component waterborne polyurethane locomotive coating |
| CN111019500A (en) * | 2019-11-12 | 2020-04-17 | 洛阳双瑞防腐工程技术有限公司 | Water-based acrylic polyurethane finish paint for rail transit and preparation method thereof |
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| CN109913110A (en) * | 2019-03-22 | 2019-06-21 | 东莞东萌化工有限公司 | A kind of environment-friendly type aqueous double-component polyurethane coating and preparation method thereof |
| CN110218511A (en) * | 2019-04-29 | 2019-09-10 | 上海立邦长润发涂料有限公司 | A kind of anti-aqueous double-component Brilliant white paint and its preparation process that heat rash appears |
| CN110305575A (en) * | 2019-07-15 | 2019-10-08 | 青岛大学 | A kind of double-component waterborne polyurethane locomotive coating |
| CN111019500A (en) * | 2019-11-12 | 2020-04-17 | 洛阳双瑞防腐工程技术有限公司 | Water-based acrylic polyurethane finish paint for rail transit and preparation method thereof |
| CN112608669A (en) * | 2020-12-18 | 2021-04-06 | 株洲华联高科有限责任公司 | Water-based double-component polyurethane-based colored paint for rail transit vehicles and preparation method thereof |
| CN113045977A (en) * | 2021-03-17 | 2021-06-29 | 山东七维新材料有限公司 | Water-based acrylic polyurethane coating for assembly type building steel structure and preparation method thereof |
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| CN115558404A (en) * | 2022-09-26 | 2023-01-03 | 中远关西涂料（上海）有限公司 | Preparation method of water-based high-gloss polyurethane finish paint suitable for engineering machinery |
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