CN105176335A - Anti-caking powder coating - Google Patents
Anti-caking powder coating Download PDFInfo
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- CN105176335A CN105176335A CN201510718919.9A CN201510718919A CN105176335A CN 105176335 A CN105176335 A CN 105176335A CN 201510718919 A CN201510718919 A CN 201510718919A CN 105176335 A CN105176335 A CN 105176335A
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- powder coating
- agglomeration resistance
- vibrin
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Abstract
The invention discloses an anti-caking powder coating. The anti-caking powder coating is prepared from, by weight, 30% to 40% of polyester resin, 30% to 40% of curing agents, 0.8% to 1.2% of flatting agents, 0.8% to 25% of pigment, 0% to 30% of inorganic fillers, 0% to 5% of assistants and 0% to 1% of gas-phase aluminum oxide. The mass ratio of the polyester resin to the curing agents is 1:1. Compared with the prior art, the anti-caking powder coating has the advantages that the polyester resin with the high glass transition temperature is prepared, the other raw materials with low influences on the glass transition temperature are used in cooperation, and the prepared powder coating has the high glass transition temperature, so that the powder coating can not be caked in the production process and the storage process, the quality of a film formed after spraying can not be influenced after the coating is stored for a long time, and the problem that the quality of the powder coating is influenced by use of the powder coating in summer and caking during long-distance transporting is solved.
Description
Technical field
The invention belongs to paint field, be specifically related to a kind of agglomeration resistance powder coating, under the environment of high temperature, high humidity, well can ensure that powder does not lump, not affect spraying and the performance of powder coating.
Background technology
Powder coating is the new coating that a kind of new development is got up, it is with its excellent chemical resistant properties, snappiness, stronger sticking power, physical strength, and a series of high-performance such as excellent ornamental, low public hazards, at building materials, household electrical appliance, oil and natural gas pipeline, instrument, medical machinery, be widely used in the fields such as electronic product, and kind and kind are also gradually improved.
But powder coating also inevitably exists some incomplete problems, such as powder coating is produced in summer and is easily produced caking phenomenon in storage process, and cause when spraying, powder blocks up rifle, powder utilization step-down, and the drawback such as particle or shrinkage cavity appears in film coated surface.
As everyone knows, the caking phenomenon of powder and the second-order transition temperature of powder have direct relation, and so-called second-order transition temperature refers to that amorphous polymer is the transition temperature of elastomeric state from glassy transition.When second-order transition temperature is polymkeric substance use, the leading indicator of thermotolerance, is the important factor affecting polymer physics performance.
So the problem that solution powder coating easily lumps, the most important thing is the second-order transition temperature improving powder coating.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of agglomeration resistance powder coating, the vibrin of the high glass transition temperature prepared by utilization, optimizing and solidifying agent proportioning, obtaining a kind of powder coating of agglomeration resistance.
The powder coating of a kind of agglomeration resistance provided by the invention, comprises following weight percent raw material:
Vibrin 30-40%
Solidifying agent 30-40%
Flow agent 0.8-1.2%
Pigment 0.8-25%
Mineral filler 0-30%
Auxiliary agent 0-5%
Gaseous oxidation aluminium 0-1%;
The mass ratio of described vibrin and solidifying agent is 1:1.
Described solidifying agent is epoxy resin.
Described flow agent is the GLP588 of Ningbo South-sea Chemical Co., Ltd..
Described pigment is titanium dioxide, carbon black, ultramarine any one or multiple pigment combinations.
Described mineral filler is barium sulfate.
Described vibrin is end carboxyl saturated polyester resin.
Described vibrin, comprises the raw material of following weight part:
Described esterifying catalyst is Mono-n-butyltin.
The preparation method of described vibrin, comprises the following steps:
(1) 1000-2000 weight part neopentyl glycol, 100-300 weight part ethylene glycol are dropped in reactor, be heated to 110-130 DEG C of fusing, stirring and evenly mixing;
(2) 1500-3000 weight part terephthalic acid and 3-8 part esterifying catalyst is added again; Be heated to 230-250 DEG C and maintain reaction, limpid to reactant, sampling, test sample acid number is 13.2mgKOH/g;
(3) be cooled to 170-200 DEG C, then drop into 200-700 part trimellitic acid 1,2-anhydride and 200-800 part m-phthalic acid, be warming up to 220-230 DEG C of maintenance, limpid to reactant, sampling detecting acid number is 84.4mgKOH/g;
(4) vacuumize 1.5-3.5h, sampling, recording acid number is 68.5mgKOH/g, and viscosity is 5600mpa.s, and second-order transition temperature is 64 DEG C, obtains vibrin, is end carboxyl saturated polyester resin.
Compared with prior art, the present invention is by preparing the vibrin had compared with high glass transition temperature, and the starting material coordinating other lower on second-order transition temperature impact, the powder coating prepared is adopted to have very high second-order transition temperature, powder coating is made to there will not be caking phenomenon in production and storage process, and the normal time deposit after do not affect the film quality problem after spraying yet, solve powder coating in summer use and caking of transporting for long-distance affects the quality difficult problem of powder coating.
Embodiment
Below in conjunction with specific examples, the present invention is described further.
Each material of the formula in embodiment is all in mass fraction.
Embodiment 1
A powder coating for agglomeration resistance, comprises following weight percent raw material:
Described vibrin, comprises the raw material of following weight part:
Described esterifying catalyst is Mono-n-butyltin.
The preparation method of described vibrin SJ3588, comprises the following steps:
(1) 1200 weight part neopentyl glycol, 200 weight part ethylene glycol are dropped in reactor, be heated to 120 DEG C of fusings, stirring and evenly mixing;
(2) 2400 weight part terephthalic acids and 5 parts of esterifying catalysts are added again; Be heated to 240 DEG C and maintain reaction, limpid to reactant, sampling, test sample acid number is 13.2mgKOH/g;
(3) be cooled to 180 DEG C, then drop into 400 parts of trimellitic acid 1,2-anhydrides and 300 parts of m-phthalic acids, be warming up to 230 DEG C of maintenances, limpid to reactant, sampling detecting acid number is 84.4mgKOH/g;
(4) vacuumize 2.4h, sampling, recording acid number is 68.5mgKOH/g, and viscosity is 5600mpa.s, and second-order transition temperature is 64 DEG C, obtains vibrin, is end carboxyl saturated polyester resin.
Embodiment 2
A powder coating for agglomeration resistance, comprises following weight percent raw material:
Described vibrin, comprises the raw material of following weight part:
Described esterifying catalyst is Mono-n-butyltin.
The preparation method of described vibrin SJ3588, comprises the following steps:
(1) 1800 weight part neopentyl glycol, 300 weight part ethylene glycol are dropped in reactor, be heated to 130 DEG C of fusings, stirring and evenly mixing;
(2) 2800 weight part terephthalic acids and 7 parts of esterifying catalyst Mono-n-butyltins are added again; Be heated to 240 DEG C and maintain reaction, limpid to reactant, sampling, test sample acid number is 13.2mgKOH/g;
(3) be cooled to 175 DEG C, then drop into 600 parts of trimellitic acid 1,2-anhydrides and 780 parts of m-phthalic acids, be warming up to 220-230 DEG C of maintenance, limpid to reactant, sampling detecting acid number is 84.4mgKOH/g;
(4) vacuumize 3.5h, sampling, recording acid number is 68.5mgKOH/g, and viscosity is 5600mpa.s, and second-order transition temperature is 64 DEG C, obtains vibrin, is end carboxyl saturated polyester resin.
The preparation method of the powder coating of described agglomeration resistance is:
The vibrin of formula ratio, solidifying agent, flow agent, pigment, mineral filler and auxiliary agent are fully mixed in mixing machine, jointly extruded by forcing machine, cool, pulverize, control particle diameter 20-40 μm, add the gaseous oxidation aluminium of formula ratio, grind, sieve, pack, obtain the powder coating of agglomeration resistance.
The powder paint curing process of described agglomeration resistance is as follows:
Workpiece pre-treatment → spraying → hot baking-curing (180-200 DEG C are toasted 10-15 minutes) → Workpiece inspection warehouse-in.
In order to understand the agglomeration resistance effect of foregoing invention example further, by the raw material of embodiment 1-2 proportioning abundant pre-mixing in mixing tank → jointly extrude → compressing tablet → pulverize → add gaseous oxidation aluminium → grind → sieve → packaging final prod by forcing machine, obtained powder coating, 2 months are stored under the same conditions with indoor, the outdoor powder of routine, contrast the following index, sees the following form 1.
Can be found out by the analysis of above table 1, the second-order transition temperature of the powder coating that example 1-2 is made is obviously high a lot of than indoor, the outdoor powder of routine, so store 2 months under identical environment after, more or less all there is caking phenomenon in conventional powders, and example 1-2 does not all have caking phenomenon; After spraying, the film coated surface of example 1-2 does not have particle and shrinkage cavity phenomenon yet, and more particle not only appears in conventional powders, and film coated surface shrinkage cavity simultaneously clearly; Because caking phenomenon appears in indoor, the outdoor powder of routine, when causing spraying, powder utilization is not fine, and the powder of example 1-2 does not have caking phenomenon, and powder is all loose condition (of surface), therefore powder utilization is all very outstanding.In sum, the present invention embodies outstanding agglomeration resistance effect, substantially increases the powder coating quality when summer stores.
Claims (8)
1. a powder coating for agglomeration resistance, is characterized in that, the powder coating of described agglomeration resistance comprises following weight percent raw material:
Vibrin 30-40%
Solidifying agent 30-40%
Flow agent 0.8-1.2%
Pigment 0.8-25%
Mineral filler 0-30%
Auxiliary agent 0-5%
Gaseous oxidation aluminium 0-1%;
The mass ratio of described vibrin and solidifying agent is 1:1.
2. the powder coating of agglomeration resistance according to claim 1, is characterized in that, described vibrin is end carboxyl saturated polyester resin.
3. the powder coating of agglomeration resistance according to claim 1, is characterized in that, described solidifying agent is epoxy resin.
4. the powder coating of agglomeration resistance according to claim 1 and 2, is characterized in that, described vibrin, comprises the raw material of following weight part:
Described esterifying catalyst is Mono-n-butyltin.
5. the powder coating of agglomeration resistance according to claim 1 and 2, is characterized in that, the preparation method of described vibrin, comprises the following steps:
(1) 1000-2000 weight part neopentyl glycol, 100-300 weight part ethylene glycol are dropped in reactor, be heated to 110-130 DEG C of fusing, stirring and evenly mixing;
(2) 1500-3000 weight part terephthalic acid and 3-8 part esterifying catalyst is added again; Be heated to 230-250 DEG C and maintain reaction, limpid to reactant, sampling, test sample acid number is 13.2mgKOH/g;
(3) be cooled to 170-200 DEG C, then drop into 200-700 part trimellitic acid 1,2-anhydride and 200-800 part m-phthalic acid, be warming up to 220-230 DEG C of maintenance, limpid to reactant, sampling detecting acid number is 84.4mgKOH/g;
(4) vacuumize 1.5-3.5h, sampling, recording acid number is 68.5mgKOH/g, and viscosity is 5600mpa.s, and second-order transition temperature is 64 DEG C, obtains vibrin, is end carboxyl saturated polyester resin.
6. the powder coating of agglomeration resistance according to claim 1, is characterized in that described flow agent is the GLP588 of Ningbo South-sea Chemical Co., Ltd..
7. the powder coating of agglomeration resistance according to claim 1, it is characterized in that described pigment be titanium dioxide, carbon black, ultramarine any one.
8. the powder coating of agglomeration resistance according to claim 1, is characterized in that described mineral filler is barium sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718919.9A CN105176335A (en) | 2015-10-30 | 2015-10-30 | Anti-caking powder coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718919.9A CN105176335A (en) | 2015-10-30 | 2015-10-30 | Anti-caking powder coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106381021A (en) * | 2016-08-30 | 2017-02-08 | 安徽美佳新材料股份有限公司 | Anti-caking powdery paint and preparation method thereof |
| CN113930133A (en) * | 2021-11-18 | 2022-01-14 | 山东东宏管业股份有限公司 | Heavy-duty anticorrosion fusion-bonding epoxy powder coating special for roll coating of large-diameter steel pipe and preparation method thereof |
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| CN1962717A (en) * | 2006-11-14 | 2007-05-16 | 广州擎天实业有限公司 | Preparation method of polyester resin for mixing type powdery coating |
| CN103342949A (en) * | 2013-07-15 | 2013-10-09 | 天津翔盛粉末涂料有限公司 | Special powder coating for radiator |
| CN103642014A (en) * | 2013-12-11 | 2014-03-19 | 浙江天松新材料股份有限公司 | Polyester resin for epoxy-cured powder coating with high glossiness and high leveling property and preparation method thereof |
| CN104341982A (en) * | 2014-10-31 | 2015-02-11 | 安徽神剑新材料股份有限公司 | Powder coating |
| CN104356370A (en) * | 2014-10-24 | 2015-02-18 | 广州擎天材料科技有限公司 | Terminal polyester resin for high filler filling quantity mixed type powder coating and preparation method of terminal polyester resin |
| CN104449268A (en) * | 2014-11-18 | 2015-03-25 | 广州擎天材料科技有限公司 | Special low-temperature cured body powder coating for aluminum wheel of automobile and preparation method thereof |
-
2015
- 2015-10-30 CN CN201510718919.9A patent/CN105176335A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962717A (en) * | 2006-11-14 | 2007-05-16 | 广州擎天实业有限公司 | Preparation method of polyester resin for mixing type powdery coating |
| CN103342949A (en) * | 2013-07-15 | 2013-10-09 | 天津翔盛粉末涂料有限公司 | Special powder coating for radiator |
| CN103642014A (en) * | 2013-12-11 | 2014-03-19 | 浙江天松新材料股份有限公司 | Polyester resin for epoxy-cured powder coating with high glossiness and high leveling property and preparation method thereof |
| CN104356370A (en) * | 2014-10-24 | 2015-02-18 | 广州擎天材料科技有限公司 | Terminal polyester resin for high filler filling quantity mixed type powder coating and preparation method of terminal polyester resin |
| CN104341982A (en) * | 2014-10-31 | 2015-02-11 | 安徽神剑新材料股份有限公司 | Powder coating |
| CN104449268A (en) * | 2014-11-18 | 2015-03-25 | 广州擎天材料科技有限公司 | Special low-temperature cured body powder coating for aluminum wheel of automobile and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106381021A (en) * | 2016-08-30 | 2017-02-08 | 安徽美佳新材料股份有限公司 | Anti-caking powdery paint and preparation method thereof |
| CN113930133A (en) * | 2021-11-18 | 2022-01-14 | 山东东宏管业股份有限公司 | Heavy-duty anticorrosion fusion-bonding epoxy powder coating special for roll coating of large-diameter steel pipe and preparation method thereof |
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Application publication date: 20151223 |
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