CN113913068A

CN113913068A - Water-based wood paint capable of removing formaldehyde

Info

Publication number: CN113913068A
Application number: CN202111129058.2A
Authority: CN
Inventors: 刘维均; 郑启伦; 赵松林; 何志才; 武承林; 郑恩方; 张艳岭; 郑凌峰
Original assignee: Zhejiang Huangyan Minghui Paint Factory; Taizhou University
Current assignee: Zhejiang Huangyan Minghui Paint Factory; Taizhou University
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-01-11

Abstract

The invention discloses a formaldehyde-removing water-based wood paint coating which is prepared from the following raw materials in parts by weight: 25-65 parts of acrylic acid solution, 5-15 parts of deionized water, 2-3 parts of emulsifier, 0.5-1.5 parts of flame retardant, 15-20 parts of titanium white slurry, 20-40 parts of plant essence, 5-10 parts of inorganic pigment, 1-3 parts of brightener, 5-15 parts of ethylene glycol, 2-5 parts of pH regulator and 5-15 parts of thickener, wherein the acrylic acid solution comprises the raw materials of acrylic acid, methyl acrylate, butyl acrylate and ethylene glycol. The invention has the beneficial effects that: the acrylic acid solution is added and is formed by mixing acrylic acid, methyl acrylate and butyl acrylate, meanwhile, in order to enable the raw materials to be mixed more completely when the solution is prepared by mixing, ethylene glycol is added to serve as an auxiliary agent, and the emulsifier and the acrylic acid solution are mixed to obtain the acrylic acid emulsion, so that the acrylic acid emulsion is used as a base solution, the acrylic acid emulsion can be mixed more quickly when other materials are added, and formaldehyde can be removed from the whole coating.

Description

Water-based wood paint capable of removing formaldehyde

Technical Field

The invention relates to a wood lacquer coating, in particular to a water-based wood lacquer coating capable of removing formaldehyde, belonging to the technical field of coatings.

Background

With the continuous prevalence of decoration at present, different people can select different decoration styles, but in recent years, the decoration styles of woodware are gradually popular, and the woodware is more attractive and durable in use, so that the corresponding paint can be used for spraying the surface of the woodware.

In order to enable some existing woodware paint to have a good using effect, a lot of chemical components are added into the woodware paint, the chemical components can slowly release some formaldehyde gas after contacting with air, and the woodware can cause no small harm to a human body after being used for a long time.

Disclosure of Invention

The invention aims to solve the problems and provide the water-based wood lacquer coating capable of removing formaldehyde.

The invention realizes the aim through the following technical scheme, and the formaldehyde-removing water-based wood paint coating is prepared from the following raw materials in parts by weight: 25-65 parts of acrylic acid solution, 5-15 parts of deionized water, 2-3 parts of emulsifier, 0.5-1.5 parts of flame retardant, 15-20 parts of titanium white slurry, 20-40 parts of plant essence, 5-10 parts of inorganic pigment, 1-3 parts of brightener, 5-15 parts of glycol, 2-5 parts of pH regulator, 5-15 parts of thickener and 3-5 parts of initiator.

Preferably, the composition raw materials of the acrylic acid solution are prepared from the following components in percentage by mass:

30-45% of acrylic acid, 15-20% of methyl acrylate, 15-20% of butyl acrylate and 20-30% of ethylene glycol;

the acrylic acid, the methyl acrylate, the butyl acrylate and the ethylene glycol are prepared according to the total mass ratio, and the whole solution is kept in alkalescence.

Preferably, the plant essence comprises the extraction materials of aloe, chlorophytum comosum, hevea brasiliensis, prunus maritima and spatholobus;

the method comprises the steps of selecting materials, cleaning, crushing, grinding and filtering, wherein the solution obtained after filtering is the plant essence.

A preparation method of a formaldehyde-removing water-based wood paint coating comprises the following steps of:

the first step is as follows: firstly, adding an acrylic acid solution and an emulsifier together, adding a prepared initiator, stirring for 20-40min, filtering and discharging by using gauze to obtain an acrylic emulsion, standing, keeping the temperature between 40 ℃ and 60 ℃, and preserving the heat for 2-3 h;

the second step is that: mixing the acrylic emulsion which is well stood with deionized water, and adding the deionized water while stirring until the acrylic emulsion is diluted and dissolved to obtain acrylic diluent;

the third step: adding plant essence, titanium white slurry, a flame retardant and a brightener into the acrylic acid diluent in sequence, stirring while adding, and obtaining a mixed solution after all the liquid medicines are mixed;

the fourth step: respectively adding a thickening agent and an inorganic pigment into the mixed solution, then adding a pH regulator into the mixed solution, adjusting the solution to be alkalescent, and then stirring at a stirring speed of 20-30r/min for 15-20h to finally obtain the water-based paint.

The utility model provides a can remove material preparation facilities of waterborne wood lacquer coating of formaldehyde, includes:

the packaging device comprises a containing barrel, wherein a packaging cover is arranged at the top end of the containing barrel, and a rotating hole is formed in the middle of the bottom end of the containing barrel;

the grinding and stirring assembly is arranged inside the containing barrel and comprises a rotating motor, the output end of the rotating motor is fixedly connected with a transmission rod, the top of the transmission rod penetrates through the rotating hole and is sleeved with a first gear, the outer walls of two sides of the first gear are meshed with second gears, the outer walls of two second gears are meshed with third gears, stirring rods are arranged at the top ends of the first gear and the two third gears, and a plurality of grinding blades are arranged on the outer walls of three stirring rods;

the filter assembly is arranged under the containing barrel and comprises a bearing frame, a filter plate is connected to the middle of the bearing frame in an inserting mode, and a material receiving box is arranged at the bottom end of the bearing frame.

Preferably, hold the inner wall of barrel head portion, and be located the top of first gear, second gear and third gear and be provided with the partition baffle, three interlude hole has been seted up on the top of partition baffle, and is three the bottom of puddler rotates with three interlude hole respectively and alternates and connects, and is three the outer wall of puddler, and the top that is located three interlude hole all is provided with sealed the pad.

Preferably, a plurality of first holes that leak have been seted up to the avris of separating the baffle top, a plurality of second holes that leak have been seted up to the avris that holds the bottom end inner wall of bucket, it is a plurality of the bottom in first hole that leaks all is provided with the guiding tube, and is a plurality of the bottom in guiding tube runs through a plurality of second holes that leak respectively to extend to the bottom that holds the bucket.

Preferably, the top of encapsulation lid is provided with the water injection pipe, the outer wall cover that holds the bucket middle part is equipped with solid fixed ring, two bracing pieces of solid fixed ring's bottom fixedly connected with, two the equal fixedly connected with mounting panel in bottom of bracing piece, two the mounting panel all is through the top fixed connection of mounting screw and carriage.

Preferably, the inner wall of the front and back both sides of the bearing frame is provided with two containing grooves, two moving openings are arranged on both sides of the bearing frame, the moving openings are communicated with the two sides of the two containing grooves, the four corners of the bottom of the bearing frame are fixedly connected with supporting legs, a discharging pipe is arranged at the bottom of the material receiving box, and the pipe wall of the discharging pipe is provided with a control switch.

Preferably, a plurality of filtration pores of crossing have been seted up on the top of filter, the filter slides to alternate to be connected in two hold the groove and two remove the mouth, the top and the bottom of filter both sides all are provided with the barrier plate.

The invention has the beneficial effects that: 1. this coating has increased acrylic acid solution, is formed by acrylic acid, methyl acrylate and butyl acrylate mixture, and simultaneously in order to make each raw materials mix more completely when solution mixing preparation, add ethylene glycol as the auxiliary agent, utilize emulsifier and acrylic acid solution to mix simultaneously and obtain acrylic acid emulsion, regard acrylic acid emulsion as base solution again like this, can mix more fast when carrying out the interpolation of other materials, and make whole coating can get rid of formaldehyde.

2. This coating has added plant essence, draws some plant essences that can absorb formaldehyde, forms plant essence after a series of operations, adds this liquid back in the preparation of coating for the efficiency that whole coating removed formaldehyde has further been promoted again.

3. This coating, when carrying out the grinding and the filtration of plant essence preparation, adopted an integration equipment, earlier smash the grinding through utilizing three sets of grinding blade to remove the blade and the rhizome of formaldehyde plant in holding the bucket, then carry out the fine screen through the filter with the thick liquid after grinding, add meticulous plant essence like this to the coating prescription in the back, can not make the coating have coarse granule to avoid influencing the use of coating.

4. This coating, the addition through titanium dioxide thick liquid, fire retardant and brightener makes the functional of whole coating richer, overcomes the wooden furniture and easily fires the characteristic through the fire retardant, utilizes the brightener to make the wooden furniture glossiness higher when using coating simultaneously, adds inorganic pigment simultaneously, has richened the color attribute of coating, when using coating spraying on wooden furniture, the wooden furniture can be gorgeous and beautiful more.

Drawings

FIG. 1 is a flow chart of the addition and configuration of various raw materials according to the present invention;

FIG. 2 is a process of refining the plant essence of the present invention;

FIG. 3 is a schematic view of the polishing filter apparatus of FIG. 2 according to the present invention;

FIG. 4 is a sectional view of the tub of FIG. 3 and a connection view of the inner structure thereof according to the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 4 according to the present invention;

FIG. 6 is an enlarged view of the structure at B in FIG. 4 according to the present invention;

FIG. 7 is a schematic view of the filter assembly of the present invention;

fig. 8 is a schematic structural diagram of the carrying frame of the present invention.

In the figure: 1. a containing barrel; 101. rotating the hole; 102. a package cover; 103. a water injection pipe; 104. a separation baffle; 105. a gasket; 106. a first water leakage hole; 107. a second water leakage hole; 108. a guide tube; 2. rotating the motor; 201. a transmission rod; 202. a first gear; 203. a second gear; 204. a third gear; 205. a stirring rod; 206. grinding the blade; 3. a fixing ring; 301. a support bar; 302. mounting a plate; 4. a bearing frame; 401. a containing groove; 402. moving the port; 403. supporting legs; 404. a material receiving box; 405. discharging the material pipe; 5. a filter plate; 501. a filtration pore; 502. a barrier plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, a formaldehyde-removing aqueous wood paint is prepared from the following raw materials in parts by weight: 25-65 parts of acrylic acid solution, 5-15 parts of deionized water, 2-3 parts of emulsifier, 0.5-1.5 parts of flame retardant, 15-20 parts of titanium white slurry, 20-40 parts of plant essence, 5-10 parts of inorganic pigment, 1-3 parts of brightener, 5-15 parts of glycol, 2-5 parts of pH regulator, 5-15 parts of thickener and 3-5 parts of initiator.

An initiator such as ammonium persulfate or potassium persulfate is added to polymerize small molecules to produce a high molecular weight emulsion.

The acrylic acid solution is prepared from the following raw materials in percentage by mass:

the acrylic acid, the methyl acrylate, the butyl acrylate and the ethylene glycol are prepared according to the total mass ratio, the whole solution is kept in alkalescence, and the pH value of the solution can be adjusted by using a pH regulator in the preparation process of the acrylic acid solution;

the ethylene glycol is colorless and odorless liquid with sweet taste, has low toxicity to animals, can be mutually dissolved with water and acetone, but has low solubility in ethers and can be used as a solvent and an antifreezing agent in the preparation of the coating, so that the components can be fused more thoroughly when the preparation of the acrylic acid solution is carried out, and the whole process is realized.

The plant essence solution is prepared from Aloe, herba Chlorophyti Henryi, hevea brasiliensis, Rich coconut and radix Calophylli Membranacei;

the plants such as aloe, chlorophytum comosum, hevea brasiliensis, prunus maritima and berberis alba can effectively absorb and decompose formaldehyde gas, so that the essence extracted by the plants can increase the formaldehyde removing effect of the coating, and the whole essence is mainly the grinding liquid capable of removing the leaves and the rhizomes of the plants.

the first step is as follows: firstly, adding an acrylic acid solution and an emulsifier together to prepare a pre-emulsion, adding a prepared initiator, stirring for 20-40min, filtering and discharging by using gauze to obtain an acrylic emulsion, standing, keeping the temperature between 40 ℃ and 60 ℃, and preserving the heat for 2-3 h;

the preparation process of the initiator comprises the following steps: 1 kg of ammonium persulfate was dissolved in 60 kg of deionized water to obtain 61 kg of an ammonium persulfate solution for polymerization.

The preparation process of the pre-emulsion comprises the following steps: adding 180 kg of deionized water into an emulsifying kettle, and adding 4 kg of AEO-9, 5 kg of COPS-1 and 3 kg of CO-436 under dispersing and stirring;

after dispersing and stirring for 5 minutes, 200 kg of butyl acrylate, 30 kg of CN303, 152 kg of isooctyl acrylate, 100 kg of methyl methacrylate, 15 kg of acrylic acid and 0.6 kg of NDM are added in turn, and the pre-emulsion of 688.6 kg is prepared after high-speed stirring and dispersing for 50 minutes.

Mixing process of pre-emulsion and initiator: adding 247 kg of deionized water into the reaction kettle, heating to 80 ℃, adding 34 kg of the pre-emulsion prepared in the step and 16 kg of the prepared ammonium persulfate solution, and reacting for 30 minutes;

then 654.6 kg of pre-emulsion is dripped, 45 kg of prepared ammonium persulfate (initiator) is synchronously dripped, the dripping time is 4.0 hours, and the pre-emulsion and the initiator are simultaneously dripped.

Note that: and (3) continuously reacting the pre-emulsion and an initiator for 20 minutes after dripping, heating to 85 ℃, carrying out heat preservation reaction for 90 minutes, cooling to below 50 ℃, adding 1 kg of Kelaien NIPACIDE CI15-HS and 1.4 kg of OT-75, stirring for 30 minutes, vacuumizing, filtering by gauze and discharging to obtain the high-peel-strength acrylic pressure-sensitive emulsion.

The acrylic acid emulsion is prepared by fully fusing the acrylic acid solution and the emulsifier during continuous stirring, the viscosity of the acrylic acid solution is improved, meanwhile, in the stirring process, heating can be performed for improving the fusing efficiency, and after the acrylic acid emulsion is successfully prepared, heat preservation and storage are needed so as to keep the stability of the acrylic acid emulsion.

the acrylic emulsion must be slowly stirred during the dilution process, so that the dilution rate is increased while avoiding decomposition of the acrylic emulsion into an acrylic acid solution.

the plant essence is extracted from some plants capable of absorbing formaldehyde, so that the formaldehyde can be effectively and quickly absorbed and decomposed by utilizing the absorption effect of the plants;

the titanium white slurry can neutralize and buffer the green color in the plant essence, so that the whole prepared solution is more diluted, the subsequent solution is convenient for color matching, the titanium white slurry can play a role in protecting the stability of a medium, the mechanical strength and the adhesive force of a paint film can be enhanced, cracks are prevented, ultraviolet rays and moisture are prevented from permeating, the service life of the paint film is prolonged, the main component in the titanium white slurry is titanium dioxide, the nanoscale titanium dioxide has the effect of removing formaldehyde, and the titanium white slurry has some effects;

the flame retardant is an important additive because the wood lacquer coating is used, the additive flame retardant is added into the polymer by a mechanical mixing method to enable the polymer to have flame retardance, the additive flame retardant is an inorganic flame retardant, the main components of the inorganic flame retardant are flame retardant systems such as antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon system and the like, and the inorganic flame retardant is used for avoiding chemical conflict with the original coating;

the brightener mainly has the function of removing oil stains, oxidized and unoxidized surface impurities remained on the surface of the woodware through an active surface, and keeping the cleanness, glossiness and color fastness of the exterior of an object.

The thickening agent is also called gelatinizing agent, is a substance capable of increasing the viscosity of latex and liquid, is also called paste when being used for food, utilizes the thickening agent to improve the viscosity of the whole coating, and enables the coating to keep a uniform and stable suspension state or an emulsion state or form gel, so that the coating can be more easily attached to the surface of a woodware when being used;

the inorganic pigment is added, so that the color of the whole coating is richer, the color matching of the coating can be carried out according to different customer requirements, and finally the pH value of the whole coating is adjusted by utilizing the pH regulator, so that the whole coating is alkaline.

the packaging device comprises a containing barrel 1, wherein a packaging cover 102 is arranged at the top end of the containing barrel 1, and a rotating hole 101 is formed in the middle of the bottom end of the containing barrel 1;

the grinding and stirring assembly is arranged inside the containing barrel 1 and comprises a rotating motor 2, the output end of the rotating motor 2 is fixedly connected with a transmission rod 201, the top of the transmission rod 201 penetrates through the rotating hole 101 and is sleeved with a first gear 202, the outer walls of the two sides of the first gear 202 are meshed with second gears 203, the outer walls of the two second gears 203 are meshed with third gears 204, stirring rods 205 are arranged at the top ends of the first gear 202 and the two third gears 204, and a plurality of grinding blades 206 are arranged on the outer walls of the three stirring rods 205;

the filter assembly, the filter assembly setting is under holding bucket 1, and the filter assembly includes bearing frame 4, and the middle part interlude of bearing frame 4 is connected with filter 5, and the bottom of bearing frame 4 is provided with material receiving box 404.

As a technical optimization scheme of the invention, a separation baffle 104 is arranged on the inner wall of the bottom of the containing barrel 1 and above the first gear 202, the second gear 203 and the third gear 204, three through holes are formed in the top end of the separation baffle 104, the bottoms of the three stirring rods 205 are respectively in rotating and penetrating connection with the three through holes, and the outer walls of the three stirring rods 205 and the top ends of the three through holes are respectively provided with a sealing gasket 105;

the avris on separating baffle 104 top has seted up a plurality of first holes 106 that leak, and the avris that holds 1 bottom inner wall of bucket has seted up a plurality of second holes 107 that leak, and the bottom in a plurality of first holes 106 that leak all is provided with guide tube 108, and the bottom of a plurality of guide tubes 108 runs through a plurality of second holes 107 that leak respectively to extend to the bottom that holds bucket 1.

As a technical optimization scheme of the invention, the top end of the packaging cover 102 is provided with the water injection pipe 103, the outer wall of the middle part of the containing barrel 1 is sleeved with the fixing ring 3, the bottom end of the fixing ring 3 is fixedly connected with two supporting rods 301, the bottom ends of the two supporting rods 301 are both fixedly connected with the mounting plates 302, and the two mounting plates 302 are both fixedly connected with the top end of the bearing frame 4 through mounting screws.

As a technical optimization scheme of the invention, two containing grooves 401 are formed in the inner walls of the front side and the back side of a bearing frame 4, two moving ports 402 are formed in the two sides of the bearing frame 4, the two moving ports 402 are communicated with the two sides of the two containing grooves 401, four corners of the bottom end of the bearing frame 4 are fixedly connected with supporting legs 403, a discharging pipe 405 is arranged at the bottom of a material receiving box 404, and a control switch is arranged on the pipe wall of the discharging pipe 405;

a plurality of filtration pores 501 have been seted up on the top of filter 5, and filter 5 slides and alternates to be connected in two hold groove 401 and two move mouthful 402, and the top and the bottom of filter 5 both sides all are provided with barrier plate 502.

When the plant essence is extracted, refer to fig. 3 to 8;

the first operation is performed by first opening the packing lid 102 and then putting the easily crushed aloe, chlorophytum comosum, hevea brasiliensis, branchlet and spatholobus stem or leaves into the tub 1.

Implementing the second step of operation, starting the rotating motor 2, wherein the output end of the rotating motor 2 drives the first gear 202 to rotate through the transmission rod 201, the first gear 202 drives the two second gears 203 to rotate under the meshing transmission, and the two second gears 203 drive the two third gears 204 to rotate under the meshing transmission again;

the first gear 202 and the two third gears 204 drive the three stirring rods 205 to rotate, the stirring rods 205 drive the grinding blades 206 on the rod arms to rotate, and the grinding blades 206 stir and crush the plant broken leaves and roots in the containing barrel 1.

Implement the third step operation, slowly and intermittently inject a small amount of water into holding bucket 1 through water injection pipe 103, hold the plant essence of output in the bucket mixing drum behind the water injection in the bucket 1, form the coarse liquid of plant essence, then the coarse liquid rethread first hole 106 and the second hole 107 that leaks of plant essence to filter 5 top of below is flowing to along guide tube 108.

Implement the fourth step operation, hold the barrier plate 502 of one side, along the slow reciprocal pulling of horizontal direction, filter 5 follows barrier plate 502 and carries out synchronous reciprocating motion, through rocking the coarse liquid of plant essence who leaks down like this moment, more meticulous plant essence exposes to material receiving box 404 in through filtration pore 501, then opening the switch of blowing pipe 405, takes out the plant essence who filters.

After the plant essence is extracted, the plant essence can be added into the wood lacquer coating according to the preparation steps for mixing.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The formaldehyde-removing water-based wood paint is characterized by being prepared from the following raw materials in parts by weight: 25-65 parts of acrylic acid solution, 5-15 parts of deionized water, 2-3 parts of emulsifier, 0.5-1.5 parts of flame retardant, 15-20 parts of titanium white slurry, 20-40 parts of plant essence, 5-10 parts of inorganic pigment, 1-3 parts of brightener, 5-15 parts of glycol, 2-5 parts of pH regulator, 5-15 parts of thickener and 3-5 parts of initiator.

2. The formaldehyde-removable waterborne wood paint coating according to claim 1, wherein: the acrylic acid solution is prepared from the following raw materials in percentage by mass:

3. The formaldehyde-removable waterborne wood paint coating according to claim 1, wherein: the plant essence solution is prepared from Aloe, herba Chloranthi Serrati, hevea brasiliensis, Rich coconut and radix Calophylli;

4. A preparation method of a formaldehyde-removing water-based wood paint coating is characterized by comprising the following steps: the wood paint coating comprises the following raw materials in an adding and preparing manner:

5. The utility model provides a can remove material preparation facilities of waterborne wood lacquer coating of formaldehyde which characterized in that: the method comprises the following steps:

the device comprises a containing barrel (1), wherein a packaging cover (102) is arranged at the top end of the containing barrel (1), and a rotating hole (101) is formed in the middle of the bottom end of the containing barrel (1);

the grinding and stirring component is arranged inside the containing barrel (1), the grinding and stirring component comprises a rotating motor (2), the output end of the rotating motor (2) is fixedly connected with a transmission rod (201), the top of the transmission rod (201) penetrates through a rotating hole (101) and is sleeved with a first gear (202), the outer walls of two sides of the first gear (202) are meshed with second gears (203), the outer walls of two second gears (203) are meshed with third gears (204), stirring rods (205) are arranged at the top ends of the first gear (202) and the two third gears (204), and a plurality of grinding blades (206) are arranged on the outer walls of three stirring rods (205);

the filter assembly, the filter assembly sets up under holding bucket (1), the filter assembly includes bearing frame (4), the middle part interlude of bearing frame (4) is connected with filter (5), the bottom of bearing frame (4) is provided with material receiving box (404).

6. The material preparation device of the formaldehyde-removing waterborne wood paint coating of claim 5, wherein: the inner wall of holding bucket (1) bottom, and the top that is located first gear (202), second gear (203) and third gear (204) is provided with separates baffle (104), separate the top of baffle (104) and seted up three interlude hole, it is three the bottom of puddler (205) rotates with three interlude hole respectively and alternates and connects, and three the outer wall of puddler (205), and the top that is located three interlude hole all is provided with sealed pad (105).

7. The device for preparing the material of the formaldehyde-removing waterborne wood paint coating according to claim 6, is characterized in that: separate the avris on baffle (104) top and seted up a plurality of first holes (106) that leak, the avris that holds bucket (1) bottom inner wall has seted up a plurality of second holes (107) that leak, and is a plurality of the bottom in first holes (106) that leak all is provided with guide tube (108), and is a plurality of the bottom of guide tube (108) runs through a plurality of second holes (107) that leak respectively to extend to the bottom that holds bucket (1).

8. The material preparation device of the formaldehyde-removing waterborne wood paint coating of claim 5, wherein: the top of encapsulation lid (102) is provided with water injection pipe (103), the outer wall cover that holds bucket (1) middle part is equipped with solid fixed ring (3), two bracing pieces (301) of the bottom fixedly connected with of solid fixed ring (3), two the equal fixedly connected with mounting panel (302) in bottom of bracing piece (301), two mounting panel (302) all through the top fixed connection of mounting screw and carriage (4).

9. The material preparation device of the formaldehyde-removing waterborne wood paint coating of claim 5, wherein: two holding grooves (401) have been seted up to the front of carriage (4) and the inner wall of back both sides, two removal mouth (402), two have been seted up to the both sides of carriage (4) it all link up each other with the both sides that two hold groove (401) to move mouth (402), the equal fixedly connected with supporting leg (403) in four corners of carriage (4) bottom, the bottom of material receiving box (404) is provided with discharging tube (405), the pipe wall of discharging tube (405) is provided with control switch.

10. The material preparation device of the formaldehyde-removing waterborne wood paint coating of claim 5, wherein: a plurality of filtration pores (501) have been seted up on the top of filter (5), filter (5) slip interlude is connected in two hold groove (401) and two move mouthful (402), the top and the bottom of filter (5) both sides all are provided with barrier plate (502).