CN109608999A - A kind of solvent-free environmental protection coating material and preparation method thereof - Google Patents
A kind of solvent-free environmental protection coating material and preparation method thereof Download PDFInfo
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- CN109608999A CN109608999A CN201811565834.1A CN201811565834A CN109608999A CN 109608999 A CN109608999 A CN 109608999A CN 201811565834 A CN201811565834 A CN 201811565834A CN 109608999 A CN109608999 A CN 109608999A
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K2201/011—Nanostructured additives
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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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Abstract
The invention belongs to technical field of coatings, specifically disclose a kind of solvent-free environmental protection coating material and preparation method thereof, including the following raw material, the raw material by percentage to the quality: polyester resin 50-60%, hydroxyalkyl amide 2-10%, auxiliary material 15-25%, pigments and fillers 10-15%, nanometer calcium carbonate 3-5%, hollow glass micropearl 3-5%, curing inhibitors 0.02-0.1%, lubricant 0.1-0.5%, levelling agent 0.5-2%, styrax 0.5-1%, ultraviolet absorber 0.5-1%；The auxiliary material includes bloom barium sulfate, blanc fixe and calcium carbonate；The pigments and fillers include titanium dioxide and mica powder.The present invention selects polyester resin for primary raw material, with safe and non-toxic hydroxyalkyl amide (HAA) for curing agent, and it is added to nanometer calcium carbonate, hollow glass micropearl, curing inhibitors and lubricant, solve the problems, such as that pin-hole phenomena easily occurs in HAA system coating, the comprehensive performance for improving coating improves dispersibility, levelability and weatherability.
Description
Technical field
The invention belongs to powder coating technology field, a kind of solvent-free environmental protection coating material and preparation method thereof is specifically disclosed.
Background technique
Powdery paints is to be transferred on coated article with powdered, with solid powder paint existing for fine powder through drying
Roasting melting solidifies to the coating of film forming.Powdery paints is a kind of novel environment-friendly decorative coating of solvent-free addition, with molten
Dosage form coating is compared, and powdered powdery paints has very big advantage in storage, transport.
Currently, the curing agent of domestic polyester type powder paint is mainly with triglycidyl isocyanurate (TGIC)
Main, although TGIC is that paint machine performance made of curing agent and weather resistance are all fine, its most fatal disadvantage is high poison
Property, environmental disruption and genetoxic, to the irritating effect of human skin, in the actual production process, worker often goes out to lose face
The situations such as eyeball is red and swollen, nostril is bled, skin blistering is festered.
In recent years, people start to be that curing agent substitutes TGIC curing agent with hydroxyalkyl amide (HAA), and HAA is safe and non-toxic, but
It is using HAA as powdery paints disadvantage prepared by curing agent is that will affect coating due to thering is hydrone to release in solidification process
Compactness, pin hole and blistering then may cause for thick coating, lead to the more difficult reality of HAA powdery paints of high levelling, thick film
It is existing.
Summary of the invention
The purpose of the present invention is providing a kind of solvent-free environmental protection coating material and preparation method thereof, solves using HAA as curing agent
Since solidification process is discharged when polyester type powder paint is applied, coating can lead to the problem of pin hole and blistering.
In order to achieve the above object, base case of the invention are as follows: a kind of solvent-free environmental protection coating material, including the following raw material,
The raw material is by percentage to the quality: polyester resin 50-60%, hydroxyalkyl amide 2-10%, auxiliary material 15-25%, pigments and fillers 10-
15%, nanometer calcium carbonate 3-5%, hollow glass micropearl 3-5%, curing inhibitors 0.02-0.1%, lubricant 0.1-0.5%,
Levelling agent 0.5-2%, styrax 0.5-1%, ultraviolet absorber 0.5-1%；The auxiliary material includes bloom barium sulfate, precipitated sulfur
Sour barium and calcium carbonate；The pigments and fillers include titanium dioxide and mica powder.
The principle and beneficial effect of this base case are:
1, the present invention selects polyester resin for primary raw material, with safe and non-toxic hydroxyalkyl amide (HAA) for curing agent, and
It is added to nanometer calcium carbonate, hollow glass micropearl, curing inhibitors and lubricant, has slowed down the curing rate of coating, is moisture
The evolution of son sets apart, and solves the problems, such as that pin hole and foaming phenomena easily occurs in HAA system coating, improves the synthesis of coating
Performance improves dispersibility, levelability and weatherability, and at low cost, applied widely, is suitable for large-scale promotion and application.
2, nanometer calcium carbonate and polyester resin have high compatibility, can improve the dispersibility of coating, and make powder
Coating high mechanical strength, glossiness made from coating are good, and nanometer calcium carbonate can reduce distributing for HAA system small molecular,
It is appropriate to improve thick coating pin hole, but levelability can be reduced；And hollow glass micropearl is a kind of hollow glass ball that size is small
Body has the characteristics that light, compression strength is high, good chemical stability, high dispersive and good fluidity, its addition improve
Nanometer calcium carbonate can reduce the problem of levelability of coating, while also mitigate product weight, and substitution and the more productions of saving are used
Resin reduces cost, strengthens the surface hardness and flexibility of coating, improves wearability, improves the resistance to acid and alkali of coating
Energy and weatherability.
3, curing inhibitors can reduce the curing activity of HAA curing agent and polyester resin, slow down the curing rate of coating, make
Coating retention time in low melt viscosity is longer, sets apart for the evolution of hydrone, thick coating is avoided pin hole occur
The phenomenon that with blistering；Lubricant improves thick coating pin hole by increasing lubricity, the angle of mobility of molten system, reduces
Melt viscosity when system solidifies extends curing time, escapes inside film convenient for small-molecule substances such as hydrones.
Further, the curing inhibitors are quaternary amine Huo quaternary alkylphosphonium salt series compound.Quaternary amine Huo quaternary alkylphosphonium salt seriation
Object is closed at present mainly as epoxy-resin systems and the curing accelerator of TGIC powder systems, but applicant sends out by test of many times
Existing, in HAA system, these substances cannot not only promote to solidify, and have certain inhibition to the curing reaction of polyester and HAA instead
Effect, can reduce solidification rate, reach the phenomenon that curing time is appropriately extended and solves coating pin hole and blistering.
Further, the titanium dioxide is rutile type titanium white.Applicant is by test of many times discovery, anatase thpe white powder
It is bigger than the reactivity of rutile type titanium white, curing reaction speed can be accelerated, be unfavorable for the evolution of hydrone；And rutile-type
The water resistance and weatherability of titanium dioxide are more preferable, therefore more preferable using the effect of rutile type titanium white.
Further, the lubricant is the group of one or more of stearic acid, stearmide, ethylene bis stearamide
It closes.
Applicant has found by test of many times, using stearic acid, stearmide, ethylene bis stearamide as lubricant, energy
The lubricity and mobility for increasing molten system facilitate the evolution of hydrone, improve thick coating pin hole, and above-mentioned three kinds of substances
Using effect it is best.
The invention also discloses a kind of preparation methods of solvent-free environmental protection coating material, comprising the following steps:
(1) dry: first all raw materials to be dried before mixing, drying temperature is controlled at 60-70 DEG C；
(2) it mixes: according to powder coating formulation ratio, load weighted raw material being subjected to mixing dispersion, wherein mixed process
Including premixing and secondary mixing:
1., premixing: first polyester resin, auxiliary material, pigments and fillers and hollow glass micropearl are pre-mixed to obtain pre-mixed material；
2., secondary mixing: by remaining raw material be added pre-mixed material in, carry out secondary mixing, the object mixed
Material；
(3) melting extrusion: the material mixed in step (2) being sent into extruder and is kneaded, and is carried out melting to material and is cut
It cuts；
(4) cooling tabletting: the fusant that will be squeezed out in extruder is squeezed into laminar material through tablet press machine, then cools down
To room temperature；
(5) crush: the laminar material elder generation coarse crushing in step (4) is ground again it is finely divided, finally by classification sieving,
Coating finished product is obtained after detection processing.
The utility model has the advantages that first, in step (1), first all raw materials is dried before mixing, reduce raw material
Humidity reduces a possibility that moisture is brought into finished product in raw material, avoids excess moisture in the coating of HAA system, guarantees coating
Quality；Second, in step (2), the mixing of material is divided into premixing and secondary mixing, mainly due to hollow glass micropearl matter
It measures very light, it is easy to suspend, needing to be stirred for a long time to be sufficiently uniformly mixed into coating, but incorporation time mistake
The long materials such as curing agent, nanometer calcium carbonate, auxiliary agent that will lead to again are meticulously pulverized, are easy to produce reunion.It therefore, first will be hollow
Glass microballoon is added in the biggish polyester resin of particle and auxiliary material, after being pre-mixed, then with remaining raw material carry out two
Secondary mixing can enable hollow glass micropearl to be more sufficiently uniformly distributed in coating, and avoid other raw materials meticulously pulverized.
Further, in step (1), the time of premixing is 3-5 minutes, and secondary incorporation time is 6-8 minutes.By application
The discovery of people's long term test, material incorporation time are lower than above range, and material crushing effect is bad and mixing is uneven, as a result can lead
Performance powder coating made of causing is bad, influences its using effect；When material incorporation time is higher than above range, although material energy
Mixing sufficiently, but be stirred for a long time will lead to material partial size it is too small, and material own temperature can be higher, and material exists
Melting phenomenon is easy to happen in mixing machine.
Further, in step (2), the feeding section temperature control of extruder is controlled in 80-90 DEG C, melt zone temperature in 100-
110 DEG C, mixing section temperature control 110-120 DEG C, discharging section temperature control at 100-110 DEG C.
It should be noted that the temperature of control extruder, the especially powdery paints of HAA system in the preparation process of powdery paints
It uses higher extrusion temperature preferably to guarantee adequately to mix, prevents the intrusion of moisture, guarantee powder quality and coating quality.Through
The discovery of applicant's long term test is crossed, within the above range, material extrusion shearing is abundant for the temperature of each section control of extruder, can make each
Component is uniformly mixed, and can't be played the performance of curing agent, auxiliary agent and be impacted, powdery paints coating performance obtained is steady
It is fixed.
Further, in step (2), the driving screw revolving speed of extruder is 40-50r/min, and feeding revolving speed is 30-40r/min.
It is found by applicant's long term test, by the driving screw revolving speed of extruder and the control of feeding revolving speed in above range, and feeding turns
Speed is lower than driving screw revolving speed, avoids in mixing section there are excessive material, guarantees that material can by abundant melting mixing and equably
Dispersion, keeps the melting effect of extruder more preferable, powdery paints particle diameter distribution obtained is uniform, powder utilization and good leveling property.
Further, in step (5), the granularity of the powdery paints finished product is 35-45 μm.When the granularity of powdery paints finished product
At 35-45 μm, powder utilization and levelability are preferable for control.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the extruder used in the embodiment of the present invention.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description includes: rack 1, motor 2, reduction gearbox 3, outer cylinder 4, driving screw 401, feeding section
5, temperature sensor 501, circulating water set 502, water pump 503, controller 504, melt zone 6, mixing section 7, discharging section 8, every
Hot plate 9, through-hole 901, material storing box 10.
Embodiment 1:
A kind of solvent-free environmental protection coating material, including the following raw material, raw material by percentage to the quality: polyester resin 56%, hydroxyl alkane
Base amide 4%, bloom barium sulfate 10%, blanc fixe 4%, calcium carbonate 3%, rutile type titanium white 10%, mica powder
3%, nanometer calcium carbonate 4%, hollow glass micropearl 4%, curing inhibitors 0.05%, lubricant 0.3%, levelling agent 0.65%,
Styrax 0.5%, ultraviolet absorber 0.5%.Wherein, curing inhibitors are quaternary amine Huo quaternary alkylphosphonium salt series compound, specifically
Using triphenyl ethyl phosphonium bromide phosphine, levelling agent is ethylene bis stearamide.
A kind of preparation method of above-mentioned solvent-free environmental protection coating material, comprising the following steps:
(1) dry: first all raw materials to be dried before mixing, drying temperature is controlled at 65 DEG C；
(2) mix: according to powder coating formulation ratio, load weighted raw material is put into high-speed mixer carry out mixing and
Dispersion, wherein mixed process includes premixing and secondary mixing:
1., premixing: first polyester resin, auxiliary material, pigments and fillers and hollow glass micropearl are pre-mixed 4 minutes and are pre-mixed
Material；
2., secondary mixing: remaining raw material is added in pre-mixed material, carries out secondary mixing, the time is 6 minutes, is obtained
To the material mixed；
(3) melting extrusion: the material mixed in step (2) being sent into extruder and is kneaded, the feeding Duan Wen of extruder
Degree control is controlled in 115 DEG C, discharging section temperature 102 in 85 DEG C, the control of melt zone temperature in 106 DEG C, the control of mixing section temperature
DEG C, driving screw revolving speed is 45r/min, and feeding revolving speed is 30r/min, carries out adequately melting shearing to material；
(4) cooling tabletting: the fusant that will be squeezed out in extruder is squeezed into laminar material through tablet press machine, then through wind
Cold conveyer belt is cooled to room temperature；
(5) crush: the laminar material elder generation coarse crushing in step (4) is ground again it is finely divided, finally by classification sieving,
Coating finished product is obtained after detection processing.
As shown in Figure 1, extruder used in the present embodiment includes rack 1, motor 2, reduction gearbox 3, outer cylinder 4, feeding section
5, melt zone 6, mixing section 7 and discharging section 8, motor 2, reduction gearbox 3 and outer cylinder 4 are installed in rack 1, motor 2 and reduction gearbox 3
It is connected；Feeding section 5, melt zone 6, mixing section 7, discharging section 8 are sequentially connected and connect, wherein melt zone 6 and mixing section 7 are positioned at outer
In cylinder 4；Feeding section 5 is located above the left end of outer cylinder 4, and its lower end is connected with outer cylinder 4, and the upper end of feeding section 5 is communicated with
Material storing box 10；Discharging section 8 is located at the bottom righthand side of outer cylinder 4, and the upper end is connected with outer cylinder 4.
By separating perpendicular to the thermal insulation board 9 of 4 axial direction of outer cylinder between melt zone 6 and mixing section 7, the two is reduced
Between heat transmitting, avoid 6 temperature of melt zone excessively high；Thermal insulation board 9 is equipped with through-hole 901, and the material after the preheating of melt zone 6 is logical
Through-hole 901 is crossed to enter in mixing section 7；The axial centre of outer cylinder 4 is equipped with driving screw 401, the left end of driving screw 401 and reduction gearbox 3
It is connected, the right end of driving screw 401 passes through through-hole 901 and is located in mixing section 7, and the screw rod of melt zone 6 and mixing section 7 is installed in
On driving screw 401, the spiro rod length for being shorter in length than mixing section 7 of the screw rod of melt zone 6, so that material is in mixing section 7
Time is longer, can sufficiently melting mixing and dispersion.
It is equipped with temperature sensor 501 in feeding section 5, specifically uses PT100 type temperature sensor；The outside of feeding section 5 is set
There is circulating water set 502, specifically, the lower end of coolant jacket is equipped with water inlet, the upper end of coolant jacket is equipped with water outlet；Recirculated water
Coolant jacket 502 is connected with water pump 503, and temperature sensor 501 is connected with controller 504, and controller 504 is for controlling water pump 503
Starting and closing.When the temperature of feeding section 5 is more than set temperature, temperature sensor 501 is by signal propagation controller
504, controller 504 controls water pump 503 and starts, and supplies water to circulating water set 502, cools down to feeding section 5, avoid material
Part melting phenomenon occurs in feeding section 5, reduces charging rate.
When running extruder, each section of temperature is set according to the requirement in step (3) first, starts motor 2, adjustment
The revolving speed of good driving screw 401 and the feeding revolving speed of feeding section 5；The material mixed is located in material storing box 10, is fed the feeding of section 5
Dispersion mixing is preheated and melted in melt zone 6, and then entering progress in mixing section 7 by through-hole 901, adequately melting is mixed
It closes and disperses, so that the organic materials such as resin equably wrap up the inorganic material such as auxiliary material, pigments and fillers, improve extruder
Melting efficiency and melting effect；It is finally extruded into tablet press machine from discharging section 8 and carries out cooling tabletting.
Embodiment 2:
A kind of solvent-free environmental protection coating material, including the following raw material, raw material by percentage to the quality: polyester resin 52%, hydroxyl alkane
Base amide 2%, bloom barium sulfate 12%, blanc fixe 5%, calcium carbonate 3%, anatase thpe white powder 12%, mica powder 3%,
Nanometer calcium carbonate 5%, hollow glass micropearl 4%, curing inhibitors 0.03%, lubricant 0.1%, levelling agent 0.6%, styrax
0.67%, ultraviolet absorber 0.6%.Wherein, curing inhibitors are quaternary amine Huo quaternary alkylphosphonium salt series compound, specifically use ten
Six alkyl trimethyl ammonium bromides, lubricant are stearic acid.
A kind of preparation method of above-mentioned solvent-free environmental protection coating material, comprising the following steps:
(1) dry: first all raw materials to be dried before mixing, drying temperature is controlled at 60 DEG C；
(2) mix: according to powder coating formulation ratio, load weighted raw material is put into high-speed mixer carry out mixing and
Dispersion, wherein mixed process includes premixing and secondary mixing:
1., premixing: first polyester resin, auxiliary material, pigments and fillers and hollow glass micropearl are pre-mixed 3 minutes and are pre-mixed
Material；
2., secondary mixing: remaining raw material is added in pre-mixed material, carries out secondary mixing, the time is 7 minutes, is obtained
To the material mixed；
(3) melting extrusion: the material mixed in step (2) being sent into extruder and is kneaded, the feeding Duan Wen of extruder
Degree control is controlled in 110 DEG C, discharging section temperature 100 in 80 DEG C, the control of melt zone temperature in 100 DEG C, the control of mixing section temperature
DEG C, driving screw revolving speed is 40r/min, and feeding revolving speed is 30r/min, carries out adequately melting shearing to material；
(4) cooling tabletting: the fusant that will be squeezed out in extruder is squeezed into laminar material through tablet press machine, then through wind
Cold conveyer belt is cooled to room temperature；
(5) crush: the laminar material elder generation coarse crushing in step (4) is ground again it is finely divided, finally by classification sieving,
Coating finished product is obtained after detection processing.
Embodiment 3:
A kind of solvent-free environmental protection coating material, including the following raw material, raw material by percentage to the quality: polyester resin 58%, hydroxyl alkane
Base amide 8%, bloom barium sulfate 8%, blanc fixe 4%, calcium carbonate 3%, rutile type titanium white 7%, mica powder 3%,
Nanometer calcium carbonate 3%, hollow glass micropearl 3%, curing inhibitors 0.1%, lubricant 0.4%, levelling agent 1.5%, styrax
0.5%, ultraviolet absorber 0.5%.Wherein, curing inhibitors are quaternary amine Huo quaternary alkylphosphonium salt series compound, specifically use benzyl
Base trimethyl ammonia chloride phosphorus, lubricant are stearmide.
A kind of preparation method of above-mentioned solvent-free environmental protection coating material, comprising the following steps:
(1) dry: first all raw materials to be dried before mixing, drying temperature is controlled at 70 DEG C；
(2) mix: according to powder coating formulation ratio, load weighted raw material is put into high-speed mixer carry out mixing and
Dispersion, wherein mixed process includes premixing and secondary mixing:
1., premixing: first polyester resin, auxiliary material, pigments and fillers and hollow glass micropearl are pre-mixed 4 minutes and are pre-mixed
Material；
2., secondary mixing: remaining raw material is added in pre-mixed material, carries out secondary mixing, the time is 8 minutes, is obtained
To the material mixed；
(3) melting extrusion: the material mixed in step (2) being sent into extruder and is kneaded, the feeding Duan Wen of extruder
Degree control is controlled in 120 DEG C, discharging section temperature 110 in 90 DEG C, the control of melt zone temperature in 110 DEG C, the control of mixing section temperature
DEG C, driving screw revolving speed is 50r/min, and feeding revolving speed is 40r/min, carries out adequately melting shearing to material；
(4) cooling tabletting: the fusant that will be squeezed out in extruder is squeezed into laminar material through tablet press machine, then through wind
Cold conveyer belt is cooled to room temperature；
(5) crush: the laminar material elder generation coarse crushing in step (4) is ground again it is finely divided, finally by classification sieving,
Coating finished product is obtained after detection processing.
Comparative example 1:
Comparative example 1 the difference from embodiment 1 is that: it is micro- that nanometer calcium carbonate, hollow glass are added without in this comparative example raw material
Pearl, curing inhibitors and lubricant.
Comparative example 2:
Comparative example 2 the difference from embodiment 1 is that: it is micro- that nanometer calcium carbonate, hollow glass are added without in this comparative example raw material
Pearl and lubricant.
Comparative example 3:
Comparative example 3 the difference from embodiment 1 is that: it is micro- that nanometer calcium carbonate, hollow glass are added without in this comparative example raw material
Pearl and curing inhibitors.
Comparative example 4:
Comparative example 4 the difference from embodiment 1 is that: be added without nanometer calcium carbonate in this comparative example raw material and hollow glass be micro-
Pearl.
Comparative example 5:
Comparative example 5 the difference from embodiment 1 is that: be added without hollow glass micropearl in this comparative example raw material.
Comparative example 6:
Comparative example 6 the difference from embodiment 1 is that: in the preparation step (2) of this comparative example, all raw materials only pass through once
Mixed processing forms material.
According to the performance test methods in national standard and relevant regulations about powdery paints, to embodiment 1-3, comparative example 1-6
In the properties of the powdery paints that is prepared and the coating formed by above-mentioned powdery paints carry out characterization test, result is such as
Shown in table 1:
Table 1
Illustrate:
1, weather resistance is test are as follows: is used artificially roughening, is accelerated in weather-proof test-run a machine in ultraviolet light, referring to GB/
The sampling of the normal space T1865-2009,4h irradiation, 4h condensation, 20min spray (circulation 5 times) carry out weather-proof survey to coating performance
Examination.
Conclusion:
1, according to the data of embodiment 1-3 in table 1 it is found that the coating leveling of the powdery paints of the present patent application is good, light
Ze Dugao, after weatherability is tested, coating has no phenomena such as discoloration or spot corrosion occurs, and illustrates that durability of coating is excellent；And it applies
Layer hardness height, adhesive force good (1 grade of adhesive force <), impact resistant strength are high, do not occur phenomena such as pin hole, blistering, illustrate this hair
The bright solvent-free environmental protection coating material prepared can satisfy the demand in practical application.
2, embodiment 1 is compared with the data of comparative example 1, coating leveling, curing time, the gloss of comparative example 1
Degree, impact resistant strength, adhesive force, hardness and weather resistance decline, and pin hole occurs in coating, it follows that nanometer calcium carbonate,
The addition of hollow glass micropearl, curing inhibitors and lubricant has effectively effect to the properties of powdery paints.
3, embodiment 1 is compared with the data of comparative example 2, coating leveling, curing time, light in comparative example 2
Damp degree, impact resistant strength, adhesive force, hardness and weather resistance decline；But comparative example 1 is compared with comparative example 2, in comparative example 2
Coating curing time increase, appearance of coat is flat and smooth, does not occur pin hole, it follows that curing inhibitors can reduce HAA
The curing activity of curing agent and polyester resin slows down the curing rate of coating, when keeping coating in low melt viscosity
Between it is longer, set apart for the evolution of hydrone, thick coating avoided the phenomenon that pin hole and blistering occur.
4, embodiment 1 is compared with the data of comparative example 3, coating leveling, curing time, light in comparative example 3
Damp degree, impact resistant strength, adhesive force, hardness and weather resistance decline；But comparative example 3 is compared with comparative example 1, in comparative example 3
Coating curing time increase, appearance of coat is flat and smooth, do not occur pin hole, it follows that lubricant by increase melting
The lubricity of system, the angle of mobility improve thick coating pin hole, the melt viscosity when system of reduction solidify, extend when solidifying
Between, it is escaped inside film convenient for small-molecule substances such as hydrones.
5, embodiment 1 is compared with the data of comparative example 4, coating leveling, glossiness, resistance to punching in comparative example 4
Hit intensity, adhesive force, hardness and weather resistance decline, it follows that the addition of nanometer calcium carbonate and hollow glass micropearl, changes
Dispersibility, levelability and the weatherability of kind coating, improve the mechanical strength and glossiness of coating.
6, embodiment 1 is compared with the data of comparative example 5, coating leveling, glossiness, resistance to punching in comparative example 5
Hit intensity, adhesive force, hardness and weather resistance decline, it follows that the addition of hollow glass micropearl improves the levelling of coating
Property, the surface hardness and flexibility of coating are strengthened, wearability is improved, improves the acid-proof alkaline and weatherability of coating.
Solves the problems, such as the reduction of nanometer calcium carbonate bring levelability.
7, embodiment 1 and the data of comparative example 6 are compared, orange peel occurs for the coating in comparative example 6 and granular sensation is existing
As, and the performances such as levelability, adhesive force and hardness have decline, illustrate without premixing and secondary mixed material preparation and
At powdery paints in, hollow glass micropearl fails fully evenly dispersed in coating, and effect fails effectively to play.
Claims (9)
1. a kind of solvent-free environmental protection coating material, it is characterised in that: including the following raw material, the raw material by percentage to the quality: polyester
Resin 50-60%, hydroxyalkyl amide 2-10%, auxiliary material 15-25%, pigments and fillers 10-15%, nanometer calcium carbonate 3-5%, hollow glass
Glass microballon 3-5%, curing inhibitors 0.02-0.1%, lubricant 0.1-0.5%, levelling agent 0.5-2%, styrax 0.5-1%,
Ultraviolet absorber 0.5-1%；The auxiliary material includes bloom barium sulfate, blanc fixe and calcium carbonate；The pigments and fillers include
Titanium dioxide and mica powder.
2. a kind of solvent-free environmental protection coating material according to claim 1, it is characterised in that: the curing inhibitors are quaternary amine
Huo quaternary alkylphosphonium salt series compound.
3. a kind of solvent-free environmental protection coating material according to claim 1, it is characterised in that: the levelling agent is stearic acid, firmly
The combination of one or more of acyl amine, ethylene bis stearamide.
4. a kind of solvent-free environmental protection coating material according to claim 3, it is characterised in that: the titanium dioxide is rutile type titanium
One of white powder and anatase thpe white powder or combination.
5. a kind of preparation method of solvent-free environmental protection coating material, it is characterised in that: the following steps are included:
(1) dry: first all raw materials to be dried before mixing, drying temperature is controlled at 60-70 DEG C；
(2) it mixes: according to powder coating formulation ratio, load weighted raw material being subjected to mixing dispersion, wherein mixed process includes
Premixing and secondary mixing:
1., premixing: first polyester resin, auxiliary material and hollow glass micropearl are pre-mixed to obtain pre-mixed material；
2., secondary mixing: by remaining raw material be added pre-mixed material in, carry out secondary mixing, the material mixed；
(3) melting extrusion: the material mixed in step (2) is sent into extruder and is kneaded, melting shearing is carried out to material；
(4) cooling tabletting: the fusant that will be squeezed out in extruder is squeezed into laminar material through tablet press machine, is subsequently cooled to often
Temperature；
(5) crush: the laminar material elder generation coarse crushing in step (4) is ground again it is finely divided, finally by classification sieving, detection
Coating finished product is obtained after processing.
6. a kind of preparation method of solvent-free environmental protection coating material according to claim 5, it is characterised in that: in step (1), in advance
The mixed time is 3-5 minutes, and secondary incorporation time is 6-8 minutes.
7. a kind of preparation method of solvent-free environmental protection coating material according to claim 6, it is characterised in that: in step (2), squeeze
The feeding section temperature control of machine is controlled in 100-110 DEG C, mixing section temperature in 110- in 80-90 DEG C, the control of melt zone temperature out
120 DEG C, discharging section temperature control at 100-110 DEG C.
8. a kind of preparation method of solvent-free environmental protection coating material according to claim 7, it is characterised in that: in step (2), squeeze
The driving screw revolving speed of machine is 40-50r/min out, and feeding revolving speed is 30-40r/min.
9. a kind of preparation method of solvent-free environmental protection coating material according to claim 8, it is characterised in that: in step (5), institute
The granularity for stating powdery paints finished product is 35-45 μm.
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| CN201811565834.1A CN109608999A (en) | 2018-12-20 | 2018-12-20 | A kind of solvent-free environmental protection coating material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811565834.1A CN109608999A (en) | 2018-12-20 | 2018-12-20 | A kind of solvent-free environmental protection coating material and preparation method thereof |
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| CN109608999A true CN109608999A (en) | 2019-04-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112295489A (en) * | 2020-10-23 | 2021-02-02 | 殷震花 | Pre-material mixing process system for dispersing water-based paint |
| CN112646319A (en) * | 2020-12-22 | 2021-04-13 | 孟运杰 | Filling agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985538A (en) * | 2010-10-27 | 2011-03-16 | 中国电器科学研究院 | Environment-friendly low-temperature curing pure polyester powder paint and preparation method thereof |
| CN103160193A (en) * | 2013-02-22 | 2013-06-19 | 安徽华辉塑业科技有限公司 | Zero diopter type polyester powder coating and preparation method thereof |
| CN103897313A (en) * | 2012-12-27 | 2014-07-02 | 陶氏环球技术有限责任公司 | A crosslinkable composition and method of producing the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985538A (en) * | 2010-10-27 | 2011-03-16 | 中国电器科学研究院 | Environment-friendly low-temperature curing pure polyester powder paint and preparation method thereof |
| CN103897313A (en) * | 2012-12-27 | 2014-07-02 | 陶氏环球技术有限责任公司 | A crosslinkable composition and method of producing the same |
| CN103160193A (en) * | 2013-02-22 | 2013-06-19 | 安徽华辉塑业科技有限公司 | Zero diopter type polyester powder coating and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112295489A (en) * | 2020-10-23 | 2021-02-02 | 殷震花 | Pre-material mixing process system for dispersing water-based paint |
| CN112646319A (en) * | 2020-12-22 | 2021-04-13 | 孟运杰 | Filling agent |
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