CN114395331A - Preparation method of water-based elastic hand feeling coating - Google Patents
Preparation method of water-based elastic hand feeling coating Download PDFInfo
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- CN114395331A CN114395331A CN202111572409.7A CN202111572409A CN114395331A CN 114395331 A CN114395331 A CN 114395331A CN 202111572409 A CN202111572409 A CN 202111572409A CN 114395331 A CN114395331 A CN 114395331A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000000576 coating method Methods 0.000 title claims abstract description 54
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- 238000002360 preparation method Methods 0.000 title claims abstract description 30
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- 239000003973 paint Substances 0.000 claims abstract description 59
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- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 24
- 229920005989 resin Polymers 0.000 claims description 20
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- 239000002562 thickening agent Substances 0.000 claims description 18
- 239000002270 dispersing agent Substances 0.000 claims description 15
- 239000000080 wetting agent Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
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- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 claims description 6
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- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 claims description 6
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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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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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
- C09D5/002—Priming paints
-
- 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
- C09D7/80—Processes for incorporating ingredients
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a preparation method of a water-based elastic hand feeling coating, wherein the water-based 2KPU double-coating elastic hand feeling coating comprises a primer and a finish. The invention adopts a form of primer and finish paint secondary coating, meets the performance requirements of some high-end electronic products on paint coating through the primer, further improves the performance through the finish paint, and provides specific hand feeling; adopting different proportioning examples to carry out a plurality of performance test experiments respectively to screen out primer finished products which meet requirements and have the best comprehensive performance, and then adopting the same experiment mode to screen out finish finished products which meet the requirements of the best overall comprehensive performance and the hand feeling by taking the screened primer as the spraying basis of the finish; the premix stirring system is adopted, the premix stirring of the primer and the finish can be carried out simultaneously, the production efficiency is greatly improved, and the internal material distribution device and the stirring system can enable the mixture to be distributed uniformly and fully mixed so as to achieve the optimal stirring and mixing effect.
Description
Technical Field
The invention relates to the fields of design and preparation of water-based 2KPU primer and finish, in particular to a preparation method of a water-based elastic handfeel coating.
Background
With the continuous improvement of the requirements on environmental protection, safety and health, the water-based paint is widely popularized, and meanwhile, the water-based paint is more popular with users due to the continuous improvement of the diversity and performance of hand feeling; at present, the types of the common waterborne elastic hand feeling coatings in the market are more, but the coatings with stronger elastic hand feeling can meet the requirements of higher chemical resistance, high temperature and high humidity resistance and the like, so that the development of the waterborne elastic hand feeling coating not only has the characteristics of good adhesion to materials, high performance of chemical resistance, high temperature and high humidity resistance and the like, but also has the waterborne elastic coating with higher hand feeling, so as to meet the requirement of customers on the touch feeling of commodities.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a preparation method of a water-based elastic handfeel paint, which is used for making the elastic handfeel paint into water so as to meet the current social development requirements and environmental protection requirements of products. The development of a two-coat 2KPU waterborne elastic coating is used for meeting the requirements of some high-end electronic products; such as mobile phones, cameras, computers and the like, not only have certain performance requirements on the coating, but also need to provide specific hand feeling. Meanwhile, the production process of customers is met as much as possible. Therefore, the baking condition of the primer is 60-80 ℃/30-60 min, and the baking condition of the hand-feeling finish paint is 60-80 ℃/30-60 min; the product is baked at a temperature of 60-80 ℃/8-12 h for carrying out a physical and chemical test.
The technical scheme is as follows: in order to achieve the aim, the water-based 2KPU double-coating elastic handfeel paint comprises a primer and a finish;
the primer of the water-based 2KPU double-coating elastic hand feeling coating comprises the following components: 40-60 parts of water-based resin, 0.5-2 parts of water-based wetting agent, 0.5-1 part of water-based defoaming agent, 0.5-1 part of water-based leveling agent, 0.5-5 parts of thickening agent, 3-5 parts of matting powder, 15-20 parts of water-based black paste, 0.1-1 part of water-based dispersing agent, 5-10 parts of water-based film-forming assistant and 10-15 parts of deionized water;
the finishing coat of the water-based double-coating 2KPU elastic hand feeling coating comprises the following components: 40-60 parts of water-based resin, 0.5-2 parts of water-based wetting agent, 0.5-1 part of water-based defoaming agent, 0.5-1 part of water-based flatting agent, 0.5-5 parts of thickening agent, 3-5 parts of matting powder, 0.1-1 part of water-based dispersing agent, 5-10 parts of water-based film-forming assistant, 10-15 parts of deionized water and 0.3-1 part of water-based hand feeling assistant.
Further, the primer of the water-based 2KPU double-coating elastic hand feeling coating comprises the following components:
the water-based resin is 1-4 of WD-562, Wanhua water-based PUD crystalol 6140, DSM-2203 and Fuqisen PUD-9035 of DIC; the aqueous wetting agent is tego-4100 and 104E for gas chemistry; the water-based defoaming agent is BYK-093; the water-based leveling agent is BYK-380; the thickening agent is an associated polyurethane thickening agent; the matting powder is hydrophobic gas-phase synthetic silicon dioxide; the aqueous black paste is medium pigment black paste; the aqueous dispersant is BYK-190; the aqueous film-forming additive is 1-3 of diethylene glycol monobutyl ether, DPnB and diethylene glycol monoethyl ether; the deionized water has the conductivity less than 5 muS/cm; the curing agent is XP2487 produced by Coxichu;
the finishing paint of the water-based double-coating 2KPU elastic hand feeling paint comprises the following components:
the water-based resin is Duanle AK011 and scientific wound water-based PUD UH 340/1; the aqueous dispersant is: tego 740W; the aqueous wetting agent is Tego-4100; the water-based defoaming agent is BYK-093; the aqueous leveling and hand feeling auxiliary agent is Dow Corning DC-51; the thickening agent is an associated polyurethane thickening agent; the matting powder is hydrophobic gas-phase synthetic silicon dioxide; the aqueous film-forming additive is 1-3 of diethylene glycol monobutyl ether, DPnB and diethylene glycol monoethyl ether; the deionized water has the conductivity less than 5 muS/cm; the water-based hand feeling auxiliary agent is one or more of DC-51 of Dow Corning, Silok51H of Siloko, 9137W; the curing agent is KESICHUAN XP 2487.
Further, A, B, C, D four kinds of water-based resins are respectively mixed and stirred with other mixing agents through a premix stirring system to respectively obtain a primer premix I, a primer premix II, a primer premix III and a primer premix IV;
the primer premix comprises the following specific mixing steps: 40-60 parts of water-based resin is firstly put into a reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm, and then 1-3 parts of auxiliary agents (defoaming agent, wetting agent and leveling agent), 5-10 parts of cosolvent and 5-10 parts of deionized water are slowly added into another reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm to obtain the primer premix.
Further, the black primer finished product is prepared by the following specific steps: mixing the primer premix I, the primer premix II, the primer premix III and the primer premix IV according to a certain proportion, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix, and obtaining a black primer finished product.
Further, mixing and stirring E, F two kinds of water-based resins with other mixing agents respectively through a premix stirring system to obtain a fabric premix I and a finish paint premix II respectively;
the specific mixing steps of the finish paint premix are as follows: 40-60 parts of waterborne resin is firstly put into a reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm, then 1-2 parts of auxiliary agent (defoaming agent, dispersing agent), 5-10 parts of cosolvent and 5-10 parts of deionized water are uniformly mixed in another reaction cylinder, and then slowly added into the waterborne resin in a low-speed stirring state, and then stirred for 10-15 minutes at 300-500 rpm, so as to obtain the finish premix.
Further, the hand feeling finish paint finished product is prepared by the following specific steps: mixing the fabric premix I and the finish paint premix II according to a proper proportion, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
Further, mixing the primer premix I, the primer premix II, the primer premix III and the primer premix IV according to various proportions to obtain a plurality of primer example control groups, respectively carrying out adhesion test, boiling test, high-temperature and high-humidity test and alkali resistance test on the primer example control groups, and screening a primer finished product with the best comprehensive performance and meeting the requirements according to the comparison result;
the method comprises the steps of mixing the fabric premix I and the finish paint premix II in different proportions to obtain a plurality of finish paint example control groups, coating the plurality of finish paint example control groups on the surfaces of the screened primer finished products meeting requirements respectively, and sequentially carrying out a water boiling test, a castor oil test, an eraser friction resistance test and a 75% ethanol resistance test respectively, wherein the finish paint finished products which have the best comprehensive performance and meet the requirements are screened by combining hand feeling strength through comparison results.
Further, the device comprises a base, wherein the base is supported on the bottom surface through an annular supporting leg; the upper end surface of the base is provided with a plurality of premix mixing drums and a spindle motor, a mixing system is arranged in each premix mixing drum, the spindle motor drives the mixing systems to synchronously rotate through a gear transmission set, and the gear transmission set is positioned on the bottom surface of the base;
the gear transmission set comprises a spindle gear, the spindle gear is driven to rotate by a spindle motor, a plurality of driven gears are arranged around the spindle gear, the driven gears are all meshed with the spindle gear, and each driven gear correspondingly drives one stirring system.
Further, the stirring system comprises a lower rotating beam and an upper rotating beam, the lower rotating beam is centrosymmetrically fixed at the end part of the driven shaft, and the driven shaft rotates along with the driven gear; the lower rotating beam and the upper rotating beam are correspondingly connected at the end parts through a first side rotating shaft and a second side rotating shaft, the lower rotating beam, the upper rotating beam, the first side rotating shaft and the second side rotating shaft form a rectangular frame, and a mounting hole for a material distribution device to pass through is correspondingly formed in the center positions of the lower rotating beam and the upper rotating beam;
the first side rotating shaft and the second side rotating shaft are respectively sleeved with a first threaded roller and a second threaded roller, the first threaded roller and the second threaded roller are internally tangent to the inner cylinder wall of the premix mixing cylinder, and the thread rotating directions of the first threaded roller and the second threaded roller are opposite;
a first flow guide plate group is arranged close to one side of the threaded roller and comprises a first flow distribution plate and a second flow distribution plate; a second flow guide plate group is arranged close to one side of the second threaded roller and comprises a third flow distribution plate and a fourth flow distribution plate;
flow distribution plate one, flow distribution plate two, flow distribution plate three and flow distribution plate four all including two reposition of redundant personnel faces, two contained angle between the reposition of redundant personnel face is the divergent angle, the divergent angle of flow distribution plate one with the divergent angle of flow distribution plate two is kept away from each other, the divergent angle of flow distribution plate three is close to each other with the divergent angle of flow distribution plate four.
Further, the distributing device is fixed relative to the cylinder cover; the distributing device comprises a distributing pipe, the distributing pipe penetrates through the mounting hole, the upper end of the distributing pipe is connected to a joint through a feeding pump, and a plurality of interfaces are arranged on the joint; the distributing pipe is positioned on the bottom surface of the cylinder cover, and the joint is positioned on the upper end surface of the cylinder cover;
the cloth pipe inner chamber is including the multistage cloth region, encircle in wherein arbitrary a plurality of cloth mouths have all evenly been laid to the regional pipe wall of cloth, the regional upper end of cloth is including conical deceleration zone, the regional lower extreme of cloth communicates in the buffer zone of back taper, the buffer zone communicates downwards in accelerating the lane, accelerating the lane communicate downwards in next section the cloth is regional the deceleration zone.
Has the advantages that: according to the preparation method of the water-based elastic hand feeling coating, a primer and finish paint secondary coating mode is adopted, the primer meets the performance requirements of some high-end electronic products on painting, the performance is further improved through the finish paint, and meanwhile, specific hand feeling is provided; adopting different proportioning examples to carry out a plurality of performance test experiments respectively to screen out primer finished products which meet requirements and have the best comprehensive performance, and then adopting the same experiment mode to screen out finish finished products which meet the requirements of the best overall comprehensive performance and the hand feeling by taking the screened primer as the spraying basis of the finish; the premix stirring system is adopted, the premix stirring of the primer and the finish can be carried out simultaneously, the production efficiency is greatly improved, and the internal material distribution device and the stirring system can enable the mixture to be distributed uniformly and fully mixed so as to achieve the optimal stirring and mixing effect.
Drawings
FIG. 1 is a flow chart of a process for preparing and screening a water-based 2KPU double-coating elastic handfeel coating;
FIG. 2 is a flow chart of a primer premix preparation process;
FIG. 3 is a flow chart of a black primer finished product preparation process;
FIG. 4 is a flow chart of a preparation process of a finish premix;
FIG. 5 is a flow chart of a process for preparing a finished hand feeling finish paint;
FIG. 6 is the final test results after one to six coats of primer examples;
FIG. 7 is the final test results after one to seven coats of topcoat examples;
FIG. 8 is an overall view of the premix stirring system;
FIG. 9 is a schematic view of a gear train arrangement;
FIG. 10 is a perspective view showing an internal structure of a premix mixing drum;
FIG. 11 is an exploded view of the internal structure of the premix mixing drum;
FIG. 12 is an overall structural view of a stirring system;
FIG. 13 is an external structural view of a distributing device;
FIG. 14 is a sectional view showing the internal structure of the distribution device;
FIG. 15 is a schematic view of the flow direction of the mixture relative to the mixing system;
FIG. 16 is a diagram showing a distribution of functional regions inside the premix mixing drum.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The preparation method of the water-based elastic hand feeling coating shown in the attached figures 1-16 comprises the steps of coating a water-based 2KPU elastic hand feeling coating with a primer and a finish;
the primer of the water-based 2KPU double-coating elastic hand feeling coating comprises the following components: 40-60 parts of water-based resin, 0.5-2 parts of water-based wetting agent, 0.5-1 part of water-based defoaming agent, 0.5-1 part of water-based leveling agent, 0.5-5 parts of thickening agent, 3-5 parts of matting powder, 15-20 parts of water-based black paste, 0.1-1 part of water-based dispersing agent, 5-10 parts of water-based film-forming assistant and 10-15 parts of deionized water;
wherein: the water-based resin is 1-4 of WD-562, Wanhua water-based PUD crystalol 6140, DSM-2203 and Fuqisen PUD-9035 of DIC; the aqueous wetting agent is tego-4100 and 104E for gas chemistry; the water-based defoaming agent is BYK-093; the water-based leveling agent is BYK-380; the thickener is an associative polyurethane thickener such as, for example, hyamine's rheelate 299; the matting powder is hydrophobic gas-phase synthetic silicon dioxide; the aqueous black paste is medium pigment black paste; the aqueous dispersant is BYK-190; the aqueous film-forming additive is 1-3 of diethylene glycol monobutyl ether, DPnB and diethylene glycol monoethyl ether; the deionized water has the conductivity less than 5 muS/cm; the curing agent is XP2487 produced by Coxichu;
the specific preparation process of the primer comprises the following steps:
a, B, C, D four kinds of water-based resin are respectively mixed and stirred with other mixing agents through a premix stirring system to respectively obtain a primer premix I, a primer premix II, a primer premix III and a primer premix IV;
the primer premix comprises the following specific mixing steps: 40-60 parts of water-based resin is firstly put into a reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm, and then 1-3 parts of auxiliary agents (defoaming agent, wetting agent and leveling agent), 5-10 parts of cosolvent and 5-10 parts of deionized water are slowly added into another reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm to obtain the primer premix.
The preparation method of the black primer finished product comprises the following specific steps: mixing the primer premix I, the primer premix II, the primer premix III and the primer premix IV according to a certain proportion, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix, and obtaining a black primer finished product.
Mixing the primer premix I, the primer premix II, the primer premix III and the primer premix IV according to various proportions to obtain a plurality of primer example control groups, respectively carrying out adhesion test, boiling test, high-temperature high-humidity test and alkali resistance test on the primer example control groups, and screening a primer finished product with the best comprehensive performance and meeting the requirements according to the comparison result;
the primer specifically includes the following primer examples:
primer example one:
mixing a primer premix I, a primer premix II, a primer premix III and a primer premix IV according to a ratio of 7:1:1:1, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), and adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix to obtain a black primer finished product.
Primer example two:
mixing a primer premix I, a primer premix II, a primer premix III and a primer premix IV according to a ratio of 5:2:2:1, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), and adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix to obtain a black primer finished product.
Primer example three:
mixing a primer premix I, a primer premix II, a primer premix III and a primer premix IV according to a ratio of 4:2:2:2, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), and adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix to obtain a black primer finished product.
Primer example four:
mixing a primer premix I, a primer premix II, a primer premix III and a primer premix IV according to a ratio of 3:3:3:1, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), and adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix to obtain a black primer finished product.
Primer example five:
mixing a primer premix I, a primer premix II, a primer premix III and a primer premix IV according to a ratio of 2:3:3:2, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), and adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix to obtain a black primer finished product.
Example six primers:
mixing a primer premix I, a primer premix II, a primer premix III and a primer premix IV according to a ratio of 1:3:3:3, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), and adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix to obtain a black primer finished product.
As shown in the result shown in figure 6, the primer in the fifth embodiment has the advantages of best comprehensive performance, stable adhesion, no surface change caused by boiling at 85 ℃/30min, outstanding high-temperature and high-humidity resistance, alkali resistance meeting the requirement and capability of meeting the requirement of elastic hand feeling on the primer.
The finishing coat of the water-based double-coating 2KPU elastic hand feeling coating comprises the following components: 40-60 parts of water-based resin, 0.5-2 parts of water-based wetting agent, 0.5-1 part of water-based defoaming agent, 0.5-1 part of water-based flatting agent, 0.5-5 parts of thickening agent, 3-5 parts of matting powder, 0.1-1 part of water-based dispersing agent, 5-10 parts of water-based film-forming assistant, 10-15 parts of deionized water and 0.3-1 part of water-based hand feeling assistant.
Wherein: the water-based resin is Duanle AK011 and scientific wound water-based PUD UH 340/1; the aqueous dispersant is: tego 740W; the aqueous wetting agent is Tego-4100; the water-based defoaming agent is BYK-093; the aqueous leveling and hand feeling auxiliary agent is Dow Corning DC-51; the thickener is an associative polyurethane thickener, such as RHE from HaiminesOLATE 299，OMG
0620, etc.; the matting powder is hydrophobic gas-phase synthetic silicon dioxide; the aqueous film-forming additive is 1-3 of diethylene glycol monobutyl ether, DPnB and diethylene glycol monoethyl ether; the deionized water has the conductivity less than 5 muS/cm; the water-based hand feeling auxiliary agent is one or more of DC-51 of Dow Corning, Silok51H of Siloko, 9137W; the curing agent is KESICHUAN XP 2487.
The specific preparation process of the finish paint comprises the following steps:
e, F mixing and stirring the two kinds of waterborne resins with other mixing agents respectively through a premix stirring system to obtain a fabric premix I and a finish paint premix II respectively;
the specific mixing steps of the finish paint premix are as follows: 40-60 parts of waterborne resin is firstly put into a reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm, then 1-2 parts of auxiliary agent (defoaming agent, dispersing agent), 5-10 parts of cosolvent and 5-10 parts of deionized water are uniformly mixed in another reaction cylinder, and then slowly added into the waterborne resin in a low-speed stirring state, and then stirred for 10-15 minutes at 300-500 rpm, so as to obtain the finish premix.
The hand feeling finish paint finished product is prepared by the following specific steps: mixing the fabric premix I and the finish paint premix II according to a proper proportion, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
The method comprises the steps of mixing the fabric premix I and the finish paint premix II in different proportions to obtain a plurality of finish paint example control groups, coating the plurality of finish paint example control groups on the surfaces of the screened primer finished products meeting requirements respectively, and sequentially carrying out a water boiling test, a castor oil test, an eraser friction resistance test and a 75% ethanol resistance test respectively, wherein the finish paint finished products which have the best comprehensive performance and meet the requirements are screened by combining hand feeling strength through comparison results.
The finishing paint comprises the following finishing paint embodiments:
example one topcoat:
mixing premix 1 and premix 2 in a ratio of 100:0, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
Finish example two:
mixing premix 1 and premix 2 in a ratio of 90:10, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
Finish example three:
mixing premix 1 and premix 2 in a ratio of 70:30, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
Example four topcoat:
mixing premix 1 and premix 2 in a ratio of 50:50, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
Finish example five:
mixing premix 1 and premix 2 in a ratio of 30:70, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
Finish example six:
mixing premix 1 and premix 2 in a ratio of 10:90, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
Finish example seven:
mixing premix 1 and premix 2 in a ratio of 0:100, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
As can be seen from the results shown in FIG. 7, the overall performance of example 4 is best: the castor oil resistance, the 75% ethanol resistance and the rubber friction resistance are good, the surface of a paint film has no obvious change, and meanwhile, the elastic hand feeling is more prominent, so that the requirement of the elastic hand feeling finish paint on the elastic hand feeling can be met.
The premix stirring system shown in fig. 8 comprises a base 1, wherein the base 1 is supported on the bottom surface through an annular support leg 3; the upper end surface of the base 1 is provided with a plurality of premix mixing drums 2 and a spindle motor 4, a plurality of mixing systems 6 are arranged in each premix mixing drum 2, the spindle motor 4 drives the plurality of mixing systems 6 to synchronously rotate through a gear transmission set 5, and the gear transmission set 5 is positioned on the bottom surface of the base 1;
the gear transmission set 5 comprises a spindle gear 7, the spindle gear 7 is driven to rotate by the spindle motor 4, a plurality of driven gears 8 are arranged around the spindle gear 7, the driven gears 8 are all meshed with the spindle gear 7, and each driven gear 8 correspondingly drives one stirring system 6;
because the components of the mixture to be put in are different in the preparation of the primer and the finish premix, the feeding step, the stirring rotating speed and the stirring time are consistent, when the primer and the finish premix are put into production, synchronous production can be realized, the gear set is used as a transmission part, the spindle gear is driven by the spindle motor to rotate, and the spindle gear drives the driven gears to rotate, so that the stirring systems are driven by the spindle motor to rotate, the stirring systems can be ensured to be stirred at the same speed and in the same direction, the spindle gear is a large gear, the driven gear is a small gear, the transmission efficiency is higher, as a preferred embodiment, six premix stirring cylinders are arranged, four of the six premix stirring cylinders are used for primer premix mixing, the other two premix cylinders are used for finish premix stirring, and the number of the premix required by a primer finished product and a finish finished product is combined, the premix stirring system completes one-time stirring, just meets the requirements of completing one part of primer and the amount of premix required by the finish paint of the aqueous two-coating 2KPU elastic hand feeling paint, realizes the matched production and greatly improves the production efficiency.
The stirring system 6 comprises a lower rotating beam 11 and an upper rotating beam 12, the lower rotating beam 11 is centrosymmetrically fixed at the end part of a driven shaft 8-1, and the driven shaft 8-1 rotates along with the driven gear 8; the lower rotary beam 11 and the upper rotary beam 12 are correspondingly connected at the end parts through a first side rotary shaft 13 and a second side rotary shaft 14, the lower rotary beam 11, the upper rotary beam 12, the first side rotary shaft 13 and the second side rotary shaft 14 form a rectangular frame, and a mounting hole 19 for a material distribution device to pass through is correspondingly formed in the center positions of the lower rotary beam 11 and the upper rotary beam 12;
the first side rotating shaft 13 and the second side rotating shaft 14 are respectively sleeved with a first threaded roller 15 and a second threaded roller 16, the first threaded roller 15 and the second threaded roller 16 are both internally tangent to the inner cylinder wall of the premix stirring cylinder 2, and the thread turning directions of the first threaded roller 15 and the second threaded roller 16 are opposite;
a first flow guide plate group 17 is arranged close to one side of the first threaded roller 15, and the first flow guide plate group 17 comprises a first flow distribution plate 17-1 and a second flow distribution plate 17-2; a second flow guide plate group 18 is arranged close to one side of the second threaded roller 16, and the second flow guide plate group 18 comprises a third flow distribution plate 18-1 and a fourth flow distribution plate 18-2;
the first flow distribution plate 17-1, the second flow distribution plate 17-2, the third flow distribution plate 18-1 and the fourth flow distribution plate 18-2 comprise two flow distribution surfaces, an included angle between the two flow distribution surfaces is a flow distribution angle, the flow distribution angle of the first flow distribution plate 17-1 is far away from the flow distribution angle of the second flow distribution plate 17-2, and the flow distribution angle of the third flow distribution plate 18-1 is close to the flow distribution angle of the fourth flow distribution plate 18-2;
as shown in fig. 16, by the position distribution of the first threaded roller 15, the second threaded roller 16, the first guide plate group 17 and the second guide plate group 18, the orientation of the diversion angle of the first diversion plate 17-1, the second diversion plate 17-2, the third diversion plate 18-1 and the fourth diversion plate 18-2 is set, and the clockwise turning direction a of the stirring system and the counterclockwise turning direction b of the first threaded roller 15 and the second threaded roller 16 are combined, so that the internal space of the premix stirring barrel is divided into four areas d, e, f and g, wherein d is a middle material distribution area, e is a branch and confluence mixing area, f is an alternating flow mixing inner ring area, and g is an alternating flow mixing outer ring area;
as shown in fig. 15, the mixture flows in the stirring process relative to the flow direction c of the stirring system, and it can be seen that along with the rotation of the stirring system, the mixture flows through the flow dividing and converging, alternately shuttles among the four areas d, e, f and g in an alternately rolling manner, forms a turbulent flow, and the mixture flows in all directions impact and mix with each other and continuously roll, so as to achieve a better stirring and sufficient effect.
The material distribution device is fixed relative to the cylinder cover 2-1; the distributing device comprises a distributing pipe 9, the distributing pipe 9 penetrates through the mounting hole 19, the upper end of the distributing pipe 9 is connected to a joint 10 through a feeding pump, and a plurality of interfaces 10-1 are arranged on the joint 10; the distributing pipe 9 is positioned at the bottom surface of the cylinder cover 2-1, and the joint 10 is positioned at the upper end surface of the cylinder cover 2-1;
the inner chamber of the cloth pipe 9 comprises a plurality of cloth areas 20 surrounding any one of the cloth areas 20, a plurality of cloth openings 21 are uniformly distributed on the pipe wall of the cloth area 20, the upper end of the cloth area 20 comprises a conical deceleration area 22, the lower end of the cloth area 20 is communicated with a buffer area 23 in an inverted cone shape, the buffer area 23 is communicated with an acceleration narrow passage 24 downwards, and the acceleration narrow passage 24 is communicated with the deceleration area 22 of the cloth area 20 downwards.
Adopt the peristaltic formula cloth pipe of multistage formula, great speed has before the mixture gets into the cloth region, because through conical deceleration zone, speed is less when reaching the cloth zone time, guaranteed during the slow resin that adds the low-speed stirring of auxiliary agent compounding, because the auxiliary agent compounding has certain stickness, after slowing down, partly power has been lost, after the buffer zone, pass and accelerate the speed up the lane and obtain short-lived acceleration, simulation intestinal wriggling mixed structure, let the upset of the inside and outside wriggling form of auxiliary agent compounding mix to do, guarantee that the auxiliary agent compounding has sufficient power and follow cloth pipe downstream, avoid causing the uneven cloth of height.
The above is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention described above, and such modifications and adaptations are intended to be within the scope of the invention.
Claims (10)
1. A preparation method of water-based elastic hand feeling paint is characterized by comprising the following steps: the water-based secondary coating 2KPU elastic hand feeling coating comprises a primer and a finish;
the primer of the water-based 2KPU double-coating elastic hand feeling coating comprises the following components: 40-60 parts of water-based resin, 0.5-2 parts of water-based wetting agent, 0.5-1 part of water-based defoaming agent, 0.5-1 part of water-based leveling agent, 0.5-5 parts of thickening agent, 3-5 parts of matting powder, 15-20 parts of water-based black paste, 0.1-1 part of water-based dispersing agent, 5-10 parts of water-based film-forming assistant and 10-15 parts of deionized water;
the finishing coat of the water-based double-coating 2KPU elastic hand feeling coating comprises the following components: 40-60 parts of water-based resin, 0.5-2 parts of water-based wetting agent, 0.5-1 part of water-based defoaming agent, 0.5-1 part of water-based flatting agent, 0.5-5 parts of thickening agent, 3-5 parts of matting powder, 0.1-1 part of water-based dispersing agent, 5-10 parts of water-based film-forming assistant, 10-15 parts of deionized water and 0.3-1 part of water-based hand feeling assistant.
2. The preparation method of the water-based elastic hand feeling coating material as claimed in claim 1, wherein the preparation method comprises the following steps: the primer of the water-based double-coating 2KPU elastic hand feeling coating comprises the following components:
the water-based resin is 1-4 of WD-562, Wanhua water-based PUD crystalol 6140, DSM-2203 and Fuqisen PUD-9035 of DIC; the aqueous wetting agent is tego-4100 and 104E for gas chemistry; the water-based defoaming agent is BYK-093; the water-based leveling agent is BYK-380; the thickening agent is an associated polyurethane thickening agent; the matting powder is hydrophobic gas-phase synthetic silicon dioxide; the aqueous black paste is medium pigment black paste; the aqueous dispersant is BYK-190; the aqueous film-forming additive is 1-3 of diethylene glycol monobutyl ether, DPnB and diethylene glycol monoethyl ether; the deionized water has the conductivity less than 5 muS/cm; the curing agent is XP2487 produced by Coxichu;
the finishing paint of the water-based double-coating 2KPU elastic hand feeling paint comprises the following components:
the water-based resin is Duanle AK011 and scientific wound water-based PUD UH 340/1; the aqueous dispersant is: tego 740W; the aqueous wetting agent is Tego-4100; the water-based defoaming agent is BYK-093; the aqueous leveling and hand feeling auxiliary agent is Dow Corning DC-51; the thickening agent is an associated polyurethane thickening agent; the matting powder is hydrophobic gas-phase synthetic silicon dioxide; the aqueous film-forming additive is 1-3 of diethylene glycol monobutyl ether, DPnB and diethylene glycol monoethyl ether; the deionized water has the conductivity less than 5 muS/cm; the water-based hand feeling auxiliary agent is one or more of DC-51 of Dow Corning, Silok51H of Siloko, 9137W; the curing agent is KESICHUAN XP 2487.
3. The preparation method of the water-based elastic hand feeling coating material as claimed in claim 2, wherein the preparation method comprises the following steps: a, B, C, D four kinds of water-based resin are respectively mixed and stirred with other mixing agents through a premix stirring system to respectively obtain a primer premix I, a primer premix II, a primer premix III and a primer premix IV;
the primer premix comprises the following specific mixing steps: 40-60 parts of water-based resin is firstly put into a reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm, and then 1-3 parts of auxiliary agents (defoaming agent, wetting agent and leveling agent), 5-10 parts of cosolvent and 5-10 parts of deionized water are slowly added into another reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm to obtain the primer premix.
4. The preparation method of the water-based elastic hand feeling coating material according to claim 3, characterized in that: the preparation method of the black primer finished product comprises the following specific steps: mixing the primer premix I, the primer premix II, the primer premix III and the primer premix IV according to a certain proportion, uniformly stirring at a low speed, adding 3-5 parts of matting powder, stirring at a high speed for 30-40min, adding 15-20 parts of water-based black paste, uniformly stirring at a medium speed (about 10-15min), adding a proper rheological additive (0.5-1.5 parts) to adjust the viscosity of the water-based black matrix, and obtaining a black primer finished product.
5. The preparation method of the water-based elastic hand feeling coating material as claimed in claim 2, wherein the preparation method comprises the following steps: e, F mixing and stirring the two kinds of waterborne resins with other mixing agents respectively through a premix stirring system to obtain a fabric premix I and a finish paint premix II respectively;
the specific mixing steps of the finish paint premix are as follows: 40-60 parts of waterborne resin is firstly put into a reaction cylinder and stirred for 10-15 minutes at the rotating speed of 300-500 rpm, then 1-2 parts of auxiliary agent (defoaming agent, dispersing agent), 5-10 parts of cosolvent and 5-10 parts of deionized water are uniformly mixed in another reaction cylinder, and then slowly added into the waterborne resin in a low-speed stirring state, and then stirred for 10-15 minutes at 300-500 rpm, so as to obtain the finish premix.
6. The preparation method of the water-based elastic hand feeling coating material as claimed in claim 5, wherein the preparation method comprises the following steps: the hand feeling finish paint finished product is prepared by the following specific steps: mixing the fabric premix I and the finish paint premix II according to a proper proportion, stirring at a low speed for 10-15 minutes, and then adding 4-6 parts of matting powder in a stirring state; and simultaneously stirring at a high speed of 1000-1500 for 30-40min, stirring at a low speed after the fineness meets the requirement, and respectively adding 1-3 parts of hand feeling auxiliary agent and 0.5-1.5 parts of rheological auxiliary agent to obtain a finished hand feeling finish paint.
7. The preparation method of the water-based elastic hand feeling coating material according to the claims 3-6, characterized in that: mixing the primer premix I, the primer premix II, the primer premix III and the primer premix IV according to various proportions to obtain a plurality of primer example control groups, respectively carrying out adhesion test, boiling test, high-temperature high-humidity test and alkali resistance test on the primer example control groups, and screening a primer finished product with the best comprehensive performance and meeting the requirements according to the comparison result;
the method comprises the steps of mixing the fabric premix I and the finish paint premix II in different proportions to obtain a plurality of finish paint example control groups, coating the plurality of finish paint example control groups on the surfaces of the screened primer finished products meeting requirements respectively, and sequentially carrying out a water boiling test, a castor oil test, an eraser friction resistance test and a 75% ethanol resistance test respectively, wherein the finish paint finished products which have the best comprehensive performance and meet the requirements are screened by combining hand feeling strength through comparison results.
8. The premix stirring system involved in the preparation method of the water-based elastic feel paint according to any one of claims 1 to 7, characterized in that: the device comprises a base (1), wherein the base (1) is supported on the bottom surface through an annular supporting leg (3); the improved premix stirring device is characterized in that a plurality of premix stirring cylinders (2) and a spindle motor (4) are arranged on the upper end face of the base (1), a plurality of stirring systems (6) are arranged in the premix stirring cylinders (2), the spindle motor (4) drives a plurality of stirring systems (6) to synchronously rotate through a gear transmission set (5), and the gear transmission set (5) is located on the bottom face of the base (1).
9. The premix stirring system involved in the preparation method of the water-based elastic hand feeling coating according to claim 8, wherein: the stirring system (6) comprises a lower rotating beam (11) and an upper rotating beam (12), the lower rotating beam (11) is centrosymmetrically fixed at the end part of the driven shaft (8-1), and the driven shaft (8-1) rotates along with the driven gear (8); the lower rotating beam (11) and the upper rotating beam (12) are correspondingly connected at the end parts through a first side rotating shaft (13) and a second side rotating shaft (14), the lower rotating beam (11), the upper rotating beam (12), the first side rotating shaft (13) and the second side rotating shaft (14) form a rectangular frame, and a mounting hole (19) for a material distribution device to pass through is correspondingly formed in the center positions of the lower rotating beam (11) and the upper rotating beam (12);
the first side rotating shaft (13) and the second side rotating shaft (14) are respectively sleeved with a first threaded roller (15) and a second threaded roller (16), the first threaded roller (15) and the second threaded roller (16) are internally tangent to the inner cylinder wall of the premix stirring cylinder (2), and the thread rotating directions of the first threaded roller (15) and the second threaded roller (16) are opposite; a first guide plate group (17) is arranged close to one side of the first threaded roller (15); and a second guide plate group (18) is arranged on one side close to the second threaded roller (16).
10. The premix stirring system involved in the preparation method of the water-based elastic hand feeling coating according to claim 9, characterized in that: the material distribution device is fixed relative to the cylinder cover (2-1); the distributing device comprises a distributing pipe (9), the distributing pipe (9) penetrates through the mounting hole (19), the upper end of the distributing pipe (9) is connected to a joint (10) through a feed pump, and a plurality of connectors (10-1) are arranged on the joint (10); the distributing pipe (9) is positioned at the bottom surface of the cylinder cover (2-1), and the joint (10) is positioned at the upper end surface of the cylinder cover (2-1);
the inner cavity of the material distribution pipe (9) comprises a plurality of material distribution areas (20) which surround any one of the material distribution areas (20) and are uniformly provided with a plurality of material distribution openings (21).
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| WO2024200774A1 (en) * | 2023-03-29 | 2024-10-03 | Qinetiq Limited | Camouflage paint |
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