CN102153940A - Energy-saving highly-decorative powder paint and preparation method thereof - Google Patents
Energy-saving highly-decorative powder paint and preparation method thereof Download PDFInfo
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- CN102153940A CN102153940A CN201110067145XA CN201110067145A CN102153940A CN 102153940 A CN102153940 A CN 102153940A CN 201110067145X A CN201110067145X A CN 201110067145XA CN 201110067145 A CN201110067145 A CN 201110067145A CN 102153940 A CN102153940 A CN 102153940A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to an energy-saving highly-decorative powder paint and a preparation method thereof. A self-researched energy-saving polyester resin is adopted, and combined with imported resin and various screened assistants with special effects to obtain the novel energy-saving powder. The invention solves the problems of poor leveling property, low luster and the like in the low-temperature cured product in the existing market, and enhances the decoration property on the premise of ensuring energy saving. The powder paint has the advantages of favorable energy-saving effect, high mechanical properties and high decoration property. Compared with the powder made from imported polyester, the invention has better comprehensive properties, and overcomes the defects of high yellowing tendency, poor mechanical properties and poor decoration property in the low-temperature powder paint in China. Nowadays, as energy saving and emission reduction are becoming increasingly important, the appearance of the energy-saving highly-decorative powder paint fills up the blank in the domestic market, and has great potential of market development and application.
Description
Technical field
The invention belongs to paint field, particularly a kind of energy-saving high-decoration powder coating and preparation method thereof.
Background technology
In the scatterer industry; powder coating has special status with its excellent performance performance; have decoration, protection and improve many-sided function such as heat dissipation capacity, all must be aim around " reasonably cost is met customer need and terminal applies " all about the design and the exploitation of powder.Along with Economic development, the raising of human civilization degree, people's environmental protection and awareness of saving energy are strengthened day by day.Initiator as scatterer proprietary powder coatings theory, and scatterer powder trend leader, Xiang is contained and is being born prior mission, how to develop and meet proprietary powder coatings more energy-conservation or that enhance productivity, to guarantee the Sustainable development of scatterer industry, become one of problem of research of the same trade.
The scatterer powder coating usually requires to have high gloss, high saturation, the effect of high-decoration, it is good to have a levelling, film bright, the surface is fine and smooth, the characteristics that spray efficiency is high.At present, according to its environment for use and effect requirements, the scatterer powder coating is mainly based on epoxy polyester mixed type, and 180 ℃/15～20min of its condition of cure general requirement because have only abundant curing, just can reach the requirement of scatterer painting effect.At present, have following several main drawback with this type of powder: the first, solidification value is higher.Higher solidification value need consume more multipotency source, and this point is mathematical, but after reaching certain temperature, if need to improve the curing oven temperature again, then needs is paid the more energy.The second, curing efficiency is low.The powder coating of scatterer market use at present needs could fully solidify long set time usually, generally reaches 15～20 minutes, and productivity is comparatively low.Certainly, curing speed and solidification value have relativity, and be when solidification value is high, fast when curing speed can hang down than solidification value.The 3rd, decorate properties is relatively poor.Energy-conservation powder in the market, though some can solidify under the condition at 160 ℃/15 minutes, decorative effect is very poor, the energy-conservation curing performance of powder that general decorative effect is good is bad.
To sum up, low-temperature curing has been to have certain ripening degree product in the powder coating industry, but because it does not have ornamental preferably: the exterior flow adjustment, gloss is low, the surface is fineless and smooth, saturation ratio is poor, thereby fails to widely apply in the decorative product field.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of energy-saving high-decoration powder coating and preparation method thereof is provided, the coating of manufacturing has solved problems such as the levelling of low-temperature curing product is poor, and gloss is low, has improved decorate properties when assurance is energy-conservation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of energy-saving high-decoration powder coating, its raw material constitutes component and parts by weight are respectively:
And the raw material of described energy-conservation vibrin constitutes component, weight percent and preparation method thereof and is respectively:
Terminal carboxyl polyester resin: 90%-94%
TriMethylolPropane(TMP): 0.5%-0.8%
Three-functionality-degree aromatic acid: 0.8%-1.2%
Carboxyl saturated polyester: 4%-8%;
Above-mentioned reactant once added carries out conventional direct esterification method in the reactor and produce, resulting can 102 ℃ of vibrin softening temperatures, 52 ℃ of second-order transition temperatures, acid number 50.8mgKOH/g, viscosity 65-70, gel time 300 seconds.
And, the oxirane value 0.119-0.128 of described Resins, epoxy D, softening temperature 92, organochlorine equivalent/gram 0.00065.
And described quaternary ammonium promotor is the Bian Ji ammonia chloride.
And described auxiliary agent is made up of 30%-40% flow agent, 25%-32% wetting enhancer, 12%-15% st-yrax, 22%-29% flow improver additive, and this auxiliary agent carries out pre-dispersed in mixing tank in advance before feeding intake.
And it is the mixture of polyamide wax with modified polyethylene wax that auxiliary agent is repaired on described surface, its part by weight 7: 3.
And, described filler selective precipitation barium sulfate and ultra-fine barium sulfate.
A kind of preparation method of energy-saving high-decoration powder coating, step is:
(1) premix: filler and quaternary ammonium promotor are repaired auxiliary agent at mixing speed 800rpm with the surface, temperature was mixed 1 minute down for 20 ℃, mix under identical parameters with energy-conservation vibrin, titanium dioxide, Resins, epoxy D, auxiliary agent, premix operation mixing time should be not less than 3 minutes again;
(2) extrude: three sections temperature of forcing machine should be controlled to be a district: 50-60 ℃, two districts: 90-95 ℃, three districts: 100-105 ℃, the forcing machine drop temperature is controlled in 130 ℃, strict in process of production control extruder temperature must not be higher than the design temperature upper limit, the extruder screw rotating speed is 45Hz, rate of feeding 35-42Hz;
(3) micro mist: the secondary mill of micro mist operation rotating speed 30-35Hz, rate of feeding 35-45Hz changes sieve and uses 180 eye mesh screens.The powder temperature is lower than 30 ℃, and powder fluidity is not less than 160.
Advantage of the present invention and positively effect are:
1, this powder coating adopts the energy-conservation vibrin of independent research, in conjunction with the import resin with through the novel energy-conserving powder that is developed into of multiple special efficacy auxiliary agent of screening, problems such as the levelling that has improved low-temperature curing product in the market is poor, and gloss is low are guaranteeing to have improved decorate properties in energy-conservation.
2, added promotor in this powder coating to quicken film-forming and to pass through the energy-conservation curing of film forming base-material, by adopting all multi-methods such as choose reasonable such as active higher vibrin and some molecular resin amount distribution, improve the effective active of whole system, thereby reduce the curing initiation temperature of whole formula system; In addition, add suitable special auxiliary agent, regulate whole diagram of system surface tension and reach optimum range, strengthen wetting effect,,, select every kind of raw material meticulously, establish prescription in the hope of reaching prescription optimization data again through the repetition test demonstration.Finally obtained fully to solidify and to have good the filming of high levelling high gloss mechanical property at 150 ℃/20 minutes or 180 ℃/8 minutes.
3, this powder coating good energy-conserving effect, mechanical property and decorate properties height are compared with the powder that the import polyester is made, and over-all properties is more excellent, has improved the shortcoming of the easy xanthochromia of domestic low-temperature powder coating, bad mechanical property, decorate properties difference.In today of more and more paying attention to energy-saving and emission-reduction, the domestic market blank has been filled up in the appearance of energy-saving high-decoration powder coating, will have great market development and application potential.
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of energy-saving high-decoration powder coating, it constitutes component and parts by weight are respectively:
Narrate the physicals of each material below respectively:
1, energy-conservation vibrin:
Raw material constitutes (weight percent):
Terminal carboxyl polyester resin: 90%-94%
TriMethylolPropane(TMP): 0.5%-0.8%
Three-functionality-degree aromatic acid: 0.8%-1.2%
Carboxyl saturated polyester: 4%-8%.
This energy-conservation vibrin is on conventional polyester synthetic prescription basis, the polyvalent alcohol and the polyprotonic acid that add a spot of three-functionality-degree, and in building-up process, introduced the very little hemicrystalline polyester of the polymerization degree to the polyester grafting, 102 ℃ of softening temperatures have finally been obtained, 52 ℃ of second-order transition temperatures, acid number 50.8mgKOH/g, viscosity 65-70, the gel time low-temperature energy-saving vibrin about 300 seconds.
The preparation method is as follows
The production of energy-conservation vibrin mainly is to produce by the direct esterification method of routine, and this kind method can once add the total overall reaction thing esterifying polycondensation that heats up in the reactor under stirring and logical rare gas element.
Wherein, in the present embodiment, the second-order transition temperature of hemicrystalline polyester is 30 ℃, the general 30-40mgKOH/g of acid number, and limiting viscosity is at 0.2-0.4, the polymkeric substance of number-average molecular weight 2000-3000.The amorphous polyester of the general equimolecular quantity of the melt viscosity of semicrystalline polyester under given molecular weight is low, this means that its introducing meeting obviously reduces the softening temperature and the melt viscosity of polyester.Because the hemicrystalline polyester is the oligopolymer that has carboxyl functional group, control under the condition of reaction ratio and temperature of reaction that it can carry out condensation reaction with the hydroxyl of branching well, not only increase the functionality of polyester, and reduced the softening temperature of polyester to a certain extent.
The present invention is by adjusting the add-on and the kind of polyvalent alcohol and polyprotonic acid, and introduce hemicrystalline oligopolymer polyester to a certain extent and carry out grafting, finally obtain having the polyester of certain degree of branching and reactive behavior, and obtained acid number and low softening point that the approximate molecular weight polyester does not have.
2, Resins, epoxy D:
Adopt homemade epoxy D, its oxirane value: 0.119-0.128; Softening temperature 92, organochlorine equivalent/gram 0.00065.
3, quaternary ammonium promotor:
It is lower that this product is finished the resin system solidification value, and scorch time is longer, thus need can low temperature under initiation reaction begin, and can provide enough initiation energy to begin reaction to carry out, can effectively strengthen the curing catalyst of system physical strength simultaneously.Finally be defined as quaternary ammonium promotor through screening, such curing catalyst is represented as the Bian Ji ammonia chloride, this type of solidifying agent be a little that temperature of reaction is low, reaction process is difficult for taking place xanthochromia, solidify the back with resin crosslinks has excellent mechanical property than other promotor.Shortcoming is that cost is slightly high, and dosage is higher than imidazoles promotor.Simultaneously, use semicrystalline polyester that curing catalyst is carried out pre-treatment, use 70% semi-crystalline resins and 30% promotor extruding to make sheet stock, utilize the integral level flowability of the low melting viscosity raising system of crystalline resins, and 150 ℃ softening temperature puts effect also for the slowly-releasing that plays of curing catalyst, and the use of this curing catalyst is the main mode that improves this product decoration property.
4, auxiliary agent:
Be made up of 30%-40% flow agent (as polyacrylic ester), 25%-32% wetting enhancer (butyl acrylate or methyl acrylate), 12%-15% st-yrax, 22%-29% flow improver additive (PE modified Poly Propylene Wax), this auxiliary agent carries out pre-dispersed in mixing tank in advance before feeding intake.
5, auxiliary agent is repaired on the surface:
Main component is the mixture (part by weight 7: 3) of polyamide wax with modified polyethylene wax, main effect is to repair the surface imperfection that is caused by the many body system reaction in coating melting and solidification process, can not cross the low coating machine degradation that causes because of molecular weight simultaneously.For better this analog assistant of solution and powder coating intermiscibility are poor, coating surface is caused the factor of delustring.The preparation method carries out surperficial coupling processing 65 ℃ of temperature to mixture with aluminate coupling agent, improves the polarity of its wettability and material surface.
6, titanium white: commercially available prod.
7, filler: selective precipitation barium sulfate and ultra-fine barium sulfate.
Preparation method of the present invention is:
(1) premix: with filler such as barium sulfate with repair auxiliary agent at mixing speed 800rpm through surface-treated special promotor and surface, temperature was mixed 1 minute down for 20 ℃, mix under identical parameters with other components such as resin, titanium dioxide, pigment, premix operation mixing time should be not less than 3 minutes again.
(2) extrude: three sections temperature of forcing machine should be controlled to be a district: 50-60 ℃, and two districts: 90-95 ℃, three districts: 100-105 ℃, the forcing machine drop temperature is controlled in 130 ℃, and strict in process of production control extruder temperature must not be higher than the design temperature upper limit.The extruder screw rotating speed is 45Hz, rate of feeding 35-42Hz.
(3) micro mist: the secondary mill of micro mist operation rotating speed 30-35Hz, rate of feeding 35-45Hz changes sieve and uses 180 eye mesh screens.Avoid the powder temperature too high in the micro mist process as far as possible, need refrigeration equipment preferably, powder need guarantee that temperature is lower than 30 ℃.Improve powder fluidity, its test rating should be not less than 160 as far as possible.Because this product overall viscosity is lower, the production whole process is avoided and other powder joints as far as possible, guarantees that the finished product are not contaminated.
Every fundamental property detection data and result by the resulting powder of above technology are as follows.
The performance test results of the energy-conservation powder of scatterer in the white system of table 8
From above experimental result, we can obtain to draw a conclusion:
1, formed the filming of this system can be compared the purpose that has reached the saving energy consumption at 150 ℃/20 minutes and 180 ℃/8 minutes film-formings with common radiator powder in the market;
2, this powder can be useful under the uniform temp faster, the characteristics more fully of curing speed equally.Improved the production coating efficiency to a certain extent;
3, this formulation cured is formed films, and flow leveling is good, the glossiness height, and the full exquisiteness of appearance of film, and good mechanical property have reached the scatterer requirement, keep the purpose of good decorate properties;
4, this prescription is for the general low-temperature curing powder on the market, and it is good to have performance, and price is low, is difficult for advantages such as xanthochromia, and the very big market competitiveness is arranged.
Claims (8)
1. energy-saving high-decoration powder coating is characterized in that: its raw material constitutes component and parts by weight are respectively:
2. energy-saving high-decoration powder coating according to claim 1 is characterized in that: the raw material of described energy-conservation vibrin constitutes component, weight percent and preparation method thereof and is respectively:
Terminal carboxyl polyester resin: 90%-94%
TriMethylolPropane(TMP): 0.5%-0.8%
Three-functionality-degree aromatic acid: 0.8%-1.2%
Carboxyl saturated polyester: 4%-8%;
Above-mentioned reactant once added carries out conventional direct esterification method in the reactor and produce, resulting can 102 ℃ of vibrin softening temperatures, 52 ℃ of second-order transition temperatures, acid number 50.8mgKOH/g, viscosity 65-70, gel time 300 seconds.
3. energy-saving high-decoration powder coating according to claim 1 is characterized in that: the oxirane value 0.119-0.128 of described Resins, epoxy D, softening temperature 92, organochlorine equivalent/gram 0.00065.
4. energy-saving high-decoration powder coating according to claim 1 is characterized in that: described quaternary ammonium promotor is the Bian Ji ammonia chloride.
5. energy-saving high-decoration powder coating according to claim 1, it is characterized in that: described auxiliary agent is made up of 30%-40% flow agent, 25%-32% wetting enhancer, 12%-15% st-yrax, 22%-29% flow improver additive, and this auxiliary agent carries out pre-dispersed in mixing tank in advance before feeding intake.
6. energy-saving high-decoration powder coating according to claim 1 is characterized in that: it is the mixture of polyamide wax with modified polyethylene wax that auxiliary agent is repaired on described surface, its part by weight 7: 3.
7. energy-saving high-decoration powder coating according to claim 1 is characterized in that: described filler selective precipitation barium sulfate and ultra-fine barium sulfate.
8. the preparation method of an energy-saving high-decoration powder coating as claimed in claim 1, it is characterized in that: step is:
(1) premix: filler and quaternary ammonium promotor are repaired auxiliary agent at mixing speed 800rpm with the surface, temperature was mixed 1 minute down for 20 ℃, mix under identical parameters with energy-conservation vibrin, titanium dioxide, Resins, epoxy D, auxiliary agent, premix operation mixing time should be not less than 3 minutes again;
(2) extrude: three sections temperature of forcing machine should be controlled to be a district: 50-60 ℃, two districts: 90-95 ℃, three districts: 100-105 ℃, the forcing machine drop temperature is controlled in 130 ℃, strict in process of production control extruder temperature must not be higher than the design temperature upper limit, the extruder screw rotating speed is 45Hz, rate of feeding 35-42Hz;
(3) micro mist: the secondary mill of micro mist operation rotating speed 30-35Hz, rate of feeding 35-45Hz changes sieve and uses 180 eye mesh screens.The powder temperature is lower than 30 ℃, and powder fluidity is not less than 160.
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| CN201110067145XA CN102153940A (en) | 2011-03-21 | 2011-03-21 | Energy-saving highly-decorative powder paint and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103333588A (en) * | 2013-06-18 | 2013-10-02 | 江苏华光粉末有限公司 | Low temperature curing powder coating and preparation method thereof |
| CN103483992A (en) * | 2013-09-03 | 2014-01-01 | 蚌埠市英路光电有限公司 | High-decorative-property alloy powder paint |
| CN103509437A (en) * | 2013-09-04 | 2014-01-15 | 安徽东方金河精密机械制造有限公司 | Indoor decorative metal powder paint |
| CN103525250A (en) * | 2013-10-12 | 2014-01-22 | 成都桑瑞斯粉末涂料有限公司 | Powdery paint special for density boards and preparation method thereof |
| CN103773126A (en) * | 2014-01-15 | 2014-05-07 | 芜湖市宝艺游乐科技设备有限公司 | Radiating paint with good peeling resistance |
| CN104530927A (en) * | 2014-12-29 | 2015-04-22 | 浙江明泉工业涂装有限公司 | Highlight type high-efficiency foam inhibition powder coating and preparation method thereof |
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| CN1613935A (en) * | 2004-09-29 | 2005-05-11 | 广州擎天实业有限公司 | Subluminous weather-resistant coating powder and preparation thereof |
| CN1613933A (en) * | 2004-09-10 | 2005-05-11 | 王凤明 | Special electrostatic powder and production thereof |
| CN101942266A (en) * | 2010-09-27 | 2011-01-12 | 天津翔盛粉末涂料有限公司 | Far infrared functional powder coating special for radiator |
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| CN1613933A (en) * | 2004-09-10 | 2005-05-11 | 王凤明 | Special electrostatic powder and production thereof |
| CN1613935A (en) * | 2004-09-29 | 2005-05-11 | 广州擎天实业有限公司 | Subluminous weather-resistant coating powder and preparation thereof |
| CN101942266A (en) * | 2010-09-27 | 2011-01-12 | 天津翔盛粉末涂料有限公司 | Far infrared functional powder coating special for radiator |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103333588A (en) * | 2013-06-18 | 2013-10-02 | 江苏华光粉末有限公司 | Low temperature curing powder coating and preparation method thereof |
| CN103333588B (en) * | 2013-06-18 | 2016-06-08 | 江苏华光粉末有限公司 | A kind of low temperature curing type powder coating and its preparation method |
| CN103483992A (en) * | 2013-09-03 | 2014-01-01 | 蚌埠市英路光电有限公司 | High-decorative-property alloy powder paint |
| CN103483992B (en) * | 2013-09-03 | 2016-06-15 | 蚌埠市英路光电有限公司 | A kind of high decoration type alloy powder coating |
| CN103509437A (en) * | 2013-09-04 | 2014-01-15 | 安徽东方金河精密机械制造有限公司 | Indoor decorative metal powder paint |
| CN103525250A (en) * | 2013-10-12 | 2014-01-22 | 成都桑瑞斯粉末涂料有限公司 | Powdery paint special for density boards and preparation method thereof |
| CN103773126A (en) * | 2014-01-15 | 2014-05-07 | 芜湖市宝艺游乐科技设备有限公司 | Radiating paint with good peeling resistance |
| CN104530927A (en) * | 2014-12-29 | 2015-04-22 | 浙江明泉工业涂装有限公司 | Highlight type high-efficiency foam inhibition powder coating and preparation method thereof |
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Application publication date: 20110817 |