CN110423498B - Flatting agent for HAA system powder coating and application thereof - Google Patents
Flatting agent for HAA system powder coating and application thereof Download PDFInfo
- Publication number
- CN110423498B CN110423498B CN201910838549.0A CN201910838549A CN110423498B CN 110423498 B CN110423498 B CN 110423498B CN 201910838549 A CN201910838549 A CN 201910838549A CN 110423498 B CN110423498 B CN 110423498B
- Authority
- CN
- China
- Prior art keywords
- powder coating
- emulsifier
- haa system
- agent
- haa
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
Abstract
The invention discloses a flatting agent for HAA system powder coating, which comprises the following raw materials: wax powder and/or emulsifier. The invention also discloses an application of the flatting agent for the HAA system powder coating in the HAA system powder coating. The invention also discloses an HAA system extinction powder coating which comprises the following raw materials: polyester resin containing carboxyl, hydroxyalkylamide curing agent, flatting agent and additive, wherein the flatting agent is the flatting agent for the HAA system powder coating. The invention selects proper wax powder or the proper wax powder and the proper emulsifier are matched with each other, thereby having good extinction effect; the flatting agent for the HAA system powder coating can be used for the HAA system flatting powder coating, the HAA system flatting powder coating can be prepared by a one-step extrusion method, the operation process is simple and convenient, and meanwhile, the HAA system flatting powder coating has a lower gloss range and is good in reproducibility and mechanical property.
Description
Technical Field
The invention relates to the technical field of flatting agents and powder coatings, in particular to a flatting agent for HAA system powder coatings and application thereof.
Background
The powder coating is a coating with 100 percent of solid components, has almost zero VOC (volatile organic compounds) which is different from the traditional solvent-based and water-based coatings, has no solvent pollution, is more energy-saving and environment-friendly, and is an environment-friendly coating. Also for this reason, the market share of powder coatings is rapidly increasing today with increasingly stringent VOC emission standards and driven by the trend of "paint to powder".
The gloss of the coating surface is an important indicator for evaluating the performance of powder coatings. It refers to the reflectivity of the coating to light at a certain angle of incidence of the light, typically 60. The higher the reflectance, the higher the gloss value, and conversely the lower the gloss. In general, powder coatings can be classified into high gloss, semi-gloss, low gloss, and dead gloss according to the gloss of the coating, and the specific gloss ranges are roughly as follows:
| categories | Gloss range (incidence angle less than or equal to 60 degree) |
| High-gloss powder coating | ＞80％ |
| Semi-gloss powder coating | 30-80％ |
| Low-gloss powder coating | 10-30％ |
| Dead light powder coating | ＜10％ |
The powder coating can be applied to various kinds of substrates, metallic substrates such as bare steel, phosphated steel, galvanized steel, aluminum material, etc., and non-metallic substrates such as plastic, wood, and Medium Density Fiber (MDF), etc. For the use of powder coatings, high gloss coatings can meet the gloss requirements of most substrates, but the demand for matt or low gloss coatings is also increasing. For some particular applications, it is desirable to use powder coating coatings with low gloss and even "dead light", which means that the powder coatings are required to obtain gloss in the range of 0% to 30% (angle of incidence. ltoreq.60 ℃) after curing of the coating.
HAA system powder coating refers to a powder coating system which takes carboxyl polyester as a main film forming substance and a hydroxyalkylamide compound as a curing agent. After years of research and development, the system has proved to have good comprehensive performance and outdoor weather resistance. The powder coating of the system can easily realize high gloss, but in some coating fields requiring low gloss powder coating, such as aluminum profiles, automobile parts, agricultural machinery, metal fencing, hardware, lamps and lanterns, etc., the HAA system powder coating has difficulty in meeting the low gloss requirement in terms of the current technology.
The matting can be achieved by adding large amounts of inorganic mineral matting additives, such as silica, calcium carbonate and sericite, to the powder coating formulation, and the use of such mineral matting agents in large amounts can reduce the mechanical properties of the coating to some extent, while also causing excessive wear on the production equipment and thus increased wear on the mechanical equipment, which is undesirable.
The addition of certain specific synthetic waxes to the composition of HAA system powder coatings can achieve limited matting with gloss ranging from approximately 40-70%. Exemplary synthetic waxes include: polyethylene wax, polypropylene wax, etc., such as PPW-0951 from Nanjing Tianshi New materials science and technology Co. EMS company's, in addition to polypropylene wax
V68-39 powder coating matting wax can achieve 42% gloss of HAA system powder coatings, although the company has not disclosed any critical technical information (see "Data sheet7.2.14,
v68-39, Highperformancementating waxforpowdercoatings ", which is now incorporated by reference in its entirety).
The most common and effective way to achieve matting of HAA-system powder coatings is currently by dry blending two separately prepared powder coating components together with a hydroxyalkyl amide curing agent. As described in US2004/0143073a1, which is hereby incorporated by reference in its entirety. According to US2004/0143073A1, this two-component dry-mix matting technique refers to the preparation of two powder coatings of different reactivity in advance, namely a first powder coating (A) consisting of a carboxyl polyester of high acid value as the main film-forming substance giving high reactivity and a curing agent hydroxyalkylamide, and a second powder coating (B) consisting of a carboxyl polyester of low acid value as the main film-forming substance combined with a curing agent hydroxyalkylamide as the low-reactive component. When prepared, A, B were mixed in proportion to form a matted HAA powder coating.
Adjustment of the final gloss can be achieved by adjusting the ratio of powder coating a and powder coating B. Furthermore, the control of gloss can also be achieved by adjusting the difference in acid value between the carboxyl polyesters. However, this dry blending method has many drawbacks. Firstly, the gloss and the layout vary greatly between different batches; secondly, extra workload is increased by respectively manufacturing two different powder coatings, so that the production and operation costs are increased; thirdly, the two kinds of powder coating are respectively cured by adopting polyester resins with different activities and the same hydroxyalkyl amide curing agent, and the reaction speeds of the carboxyl polyester with different activities and the curing agent are different, so that the technical defects of extinction caused by the difference of the reaction speeds in the curing process, undesirable bright spots on the surface after curing and the like can be caused.
In view of the many inevitable technical drawbacks of the dry mixing process, it is particularly urgent to find a matting solution that is easy and efficient to handle.
To meet such a demand, it has been proposed to achieve matting of HAA system powder coatings by a one-step extrusion process. The matt powder coatings prepared by this one-step extrusion process have good reproducibility, since the components are sufficiently miscible so that there is little difference in gloss between the different batches of product. Compared with a dry mixing method, the one-step extrusion method can realize the preparation of the low-gloss powder coating only by one-time production and extrusion process, thereby simplifying the production process and saving the cost.
The film-forming materials employed in the prior art one-step extrusion matte solutions typically comprise an amorphous carboxylated polyester resin and at least one carboxylated polyester resin that is incompatible with the amorphous polyester resin used. Such incompatible polyester resins are mainly (semi-) crystalline carboxyl polyester resins.
The (semi) crystalline carboxyl polyester resin generally has a very low melting point and a very low melt viscosity, and is melted first during the solidification process and generates a solvent effect to wrap part or all of the amorphous carboxyl polyester in the melted (semi) crystalline carboxyl polyester resin. After the reaction with the curing agent hydroxyalkyl amide, the substance obtained by the reaction of the (semi-) crystalline carboxyl polyester resin and the curing agent can be partially or completely crystallized and separated out, thereby generating a phase separation effect and leading the surface gloss of the cured coating to be sharply reduced. Therefore, in the HAA system powder coating composition in which matting is achieved by using an amorphous carboxyl polyester resin in combination with a (semi) crystalline carboxyl polyester resin, it is necessary to add such a (semi) crystalline carboxyl polyester resin in a large amount to produce a sufficient phase separation effect during curing to achieve the desired matting. Typically the weight ratio of (semi) crystalline carboxyl polyester resin to amorphous carboxyl polyester resin is 1: 1, or even greater.
The use of amorphous polyester resins in combination with (semi) crystalline polyester resins for the preparation of matt powder coatings is described in patent US6660398 and patent JP2006070082, which are incorporated herein by reference in their entirety. The use of large amounts of (semi) crystalline carboxyl polyester resins results in a decrease in the Tg of the final powder coating, thereby affecting the storage stability of the final powder coating, while the use of large amounts of film-forming materials with lower melt viscosity complicates the extrusion process of the coating. Furthermore, such (semi) crystalline carboxyl polyester resins are also generally expensive, which adds to the cost of the user, which is undesirable.
Another problem faced by low gloss powder coatings is poor mechanical properties of the coating. Especially at gloss values below 40%. It is therefore of great interest to be able to prepare reproducible, low-gloss powder coatings with good mechanical properties by a one-step extrusion process.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a flatting agent for HAA system powder coating and application thereof, and HAA system flatting powder coating. The flatting agent can be used for HAA system flatting powder coating, the HAA system flatting powder coating can be prepared by a one-step extrusion method, the operation process is simple and convenient, and meanwhile, the HAA system flatting powder coating has a low gloss range and is good in reproducibility and mechanical properties.
The invention provides a flatting agent for HAA system powder coating, which comprises the following raw materials: wax powder and/or emulsifier.
Preferably, the wax powder is at least one of vegetable wax, mineral wax, petroleum wax, and synthetic wax.
Preferably, the wax powder is at least one of vegetable wax, mineral wax and synthetic wax.
Preferably, the wax powder is at least one of mineral wax and synthetic wax.
The vegetable wax comprises: beeswax, carnauba wax and the like, and petroleum waxes include: paraffin waxes, etc., and synthetic waxes include: polyethylene waxes, polypropylene waxes, and the like.
Preferably, the wax powder is a mineral wax.
Preferably, the mineral waxes comprise: montan wax.
Preferably, the mineral wax has a melting range of 60 to 100 ℃.
Preferably, the mineral wax has a melting range of 75-80 ℃.
Preferably, the acid number of the mineral wax is in the range of 5-20mg KOH/g.
Preferably, the acid number of the mineral wax is in the range of 10-14mg KOH/g.
Preferably, the mineral wax has a saponification number in the range of 90 to 130mg KOH/g.
Preferably, the mineral wax has a saponification number in the range of 100-120mg KOH/g.
Preferably, the mineral wax has a viscosity of 200-400mPa.s at 120 ℃.
Preferably, the mineral wax has a viscosity of 250-350mPa.s at 120 ℃.
Preferably, the viscosity of the mineral wax at 120 ℃ is 290-310 mPa.s.
Such wax powders are commercially available as, for example, Clariant's montan wax Licowax OP.
Preferably, the emulsifier is at least one of a sorbitol fatty acid ester emulsifier, a phospholipid ester emulsifier, a phosphate ester emulsifier, and a glycolipid emulsifier.
Preferably, the emulsifier is at least one of a sorbitol fatty acid ester emulsifier, a phospholipid ester emulsifier and a phosphate ester emulsifier.
Preferably, the emulsifier is a phosphate ester emulsifier.
The sorbitol fatty acid ester emulsifier comprises: span 20, span 40, span 60, span 80, span 85, tween 20, tween 40, tween 60, tween 80 and the like.
The glycolipid emulsifier comprises: sucrose monofatty acid ester, sucrose difatty acid ester, sucrose trilatty acid ester, sucrose benzoate, etc.
Preferably, the phosphate ester type emulsifier comprises: fatty alcohol ether phosphate, phenol ether phosphate, isotridecyl alcohol phosphate, lauryl phosphate, fatty alcohol ether phosphate potassium salt, phenol ether phosphate, isotridecyl alcohol phosphate potassium salt, lauryl phosphate potassium salt, cetostearyl alcohol phosphate, dodecatetradecyl alcohol phosphate and the like.
The emulsifier is commercially available, such as fatty alcohol ether phosphate MOA-9P, MOA-3P from Nantong Hengrun New Material science and technology Co.
Preferably, when an emulsifier is included in the matting agent, the emulsifier is present in the matting agent in an amount of 5 to 18%.
Preferably, when an emulsifier is included in the matting agent, the emulsifier content of the matting agent is 8 to 11%.
The invention also provides the application of the flatting agent for the HAA system powder coating in the HAA system powder coating.
The invention also provides an HAA system extinction powder coating which comprises the following raw materials: polyester resin containing carboxyl, hydroxyalkylamide curing agent, flatting agent, additive and/or pigment filler, wherein the flatting agent is the flatting agent for the HAA system powder coating.
Preferably, the acid value of the carboxyl group-containing polyester resin is in the range of 10 to 100mg KOH/g.
Preferably, the acid value of the carboxyl group-containing polyester resin is in the range of 20 to 80mg KOH/g.
Preferably, the acid value of the carboxyl group-containing polyester resin is in the range of 25 to 40mg KOH/g.
Preferably, the carboxyl group-containing polyester resin has a glass transition temperature Tg of 40 to 80 ℃.
Preferably, the carboxyl group-containing polyester resin has a glass transition temperature Tg of 45 to 65 ℃.
Preferably, the carboxyl group-containing polyester resin has a glass transition temperature Tg of 50 to 65 ℃.
Preferably, the carboxyl group-containing polyester resin is formed by condensing a dibasic acid and a polyhydric alcohol.
Preferably, the carboxyl group-containing polyester resin is prepared by condensing a dibasic acid and an equivalent amount of a diol.
Preferably, the dibasic acids include: terephthalic acid, isophthalic acid, 1, 4-cyclohexyldicarboxylic acid, adipic acid, maleic acid, succinic acid, or the like.
Preferably, the polyol comprises: ethylene glycol, diethylene glycol, propylene glycol, hexanediol, neopentyl glycol, cyclohexyldimethanol, trimethylolpropane, or the like.
The above carboxyl group-containing polyester resin is commercially available, for example, as SJ5122, SJ5100, etc. of Anhui sword.
Preferably, the hydroxyalkylamide curing agent has the following structural formula:
wherein A is a hydrogen atom, an alkyl group having 1 to 60 carbon atoms, an aryl group or an alkenyl group, R1 is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a hydroxyalkyl group having 1 to 5 carbon atoms, R2 is a hydrogen atom or a methyl group, n' is an integer of 0 to 2, and n is an integer of 1 to 10.
The above alkyl group having 1 to 60 carbon atoms is a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an eicosyl group, a triacontyl group, a forty-alkyl group, a fifty-alkyl group, a sixty-alkyl group or the like.
The above aryl group is phenyl, naphthyl, etc.
The above-mentioned alkenyl group is vinyl, isopropenyl, 1, 3-dimethyl-3-propenyl, 1, 2-dimethyl-2-propenyl, 3-carboxy-2-propenyl, 3-ethoxycarbonyl-2-propenyl, etc.
The above alkyl group having 1 to 5 carbon atoms is a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an isobutyl group, a tert-butyl group, a pentyl group or the like.
The hydroxyalkyl group having 1 to 5 carbon atoms is hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl, 4-hydroxybutyl, 3-hydroxybutyl, 2-hydroxy-2-methylpropyl, 5-hydroxypentyl, 4-hydroxypentyl, 3-hydroxypentyl, 2-hydroxypentyl, or the like.
Preferably, n is an integer from 1 to 2.
Preferably, A is (CH)2) m, wherein m is an integer of 1-10.
Preferably, m is an integer from 2 to 8.
Preferably, m is 4.
Preferably, the hydroxyalkylamide curing agent is at least one of N, N '-tetrakis (. beta. -hydroxyethyl) adipamide and N, N' -tetrakis (. beta. -hydroxypropyl) adipamide.
The above N, N, N ', N' -tetrakis (. beta. -hydroxyethyl) adipamide is commercially available, for example, from Primid XL552 of EMS, T105 of Ningbo south sea chemistry, Vestagon HA320 of Degussa, AHA6552 of Anhui Huaan, etc.
The above-mentioned N, N, N ', N' -tetrakis (. beta. -hydroxypropyl) adipamide is commercially available, for example, Primid QM1260 from EMS.
Preferably, the carboxyl group containing polyester resin is 40-60% of the total weight of the HAA system matting powder coating.
Preferably, the carboxyl group containing polyester resin is 50-60% of the total weight of the HAA system matting powder coating.
Preferably, the matting agent is 5-10% by weight of the total amount of the HAA system matting powder coating.
Preferably, the matting agent is 6 to 7% by weight of the total amount of the HAA system matting powder coating.
Preferably, the weight ratio of the hydroxyalkylamide curing agent to the carboxyl group-containing polyester resin is from 4 to 6: 94-96.
Preferably, the additives include: levelling agents, plasticizers, stabilizers or deaerators.
Stabilizers such as stabilizers against UV degradation, etc.; degasifier such as benzoin.
Pigments such as TiO2Iron oxide red, iron oxide yellow, chromium pigment,Carbon black, phthalocyanine blue, azo, anthraquinone, thioindigo, benzanthrone, triphenyldioxane, quinacridone, etc.; pigments having a resistance to outdoor exposure are preferred.
Preferably, the HAA system matte powder coating is prepared according to a one-step extrusion process.
The above one-step extrusion method is generally: mixing the raw materials uniformly, and then performing hot melting and mixing, tabletting, crushing and sieving to obtain the product, wherein the mesh number of the sieve is 80-200 meshes (Chinese standard sieve); preferably 100-180 mesh, more preferably 140-180 mesh.
The powder coating can be applied by adhering it to a substrate (e.g., a metal substrate) by powder electrostatic gun, friction gun spray, fluidized bed dip coating, hot melt sintering, etc., and then curing by heating or radiation to form a coating film. The coating thickness is selected as desired and can be 50 to 400 microns, preferably 60 to 80 microns.
Through a plurality of tests, the invention discovers that the proper wax powder or the proper wax powder and the proper emulsifier are matched with each other, so that the gloss (60 degrees) of less than 30 percent can be provided; therefore, the technical problem that the two-component dry mixing is needed to obtain the low-gloss powder coating at present is solved, and the HAA system extinction powder coating can be prepared by a one-step extrusion method without dry mixing, which is very significant; and solves the problems that the prior method for obtaining the powder coating with the low gloss range needs to use a large amount of (semi-) crystalline carboxyl polyester resin by a one-step extrusion method, and the powder coating has low Tg, low stability, complex extrusion process, high cost and the like, which is very significant.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Test method
Leveling-visual based on PCI classification method, where 10 is the best and 0 is the worst;
film thickness-measured directly with a magnetic thickness meter (thickness meter, qmix 4500 from the company nix GmbH, Automation dr, germany;
gloss; the reflectivity is measured according to the GB/T1743-89 standard, and the reflectivity is 60 degrees, and is directly measured by adopting Micro-gloss 60 degrees 4442 of Germany BYK company;
impact strength; the method is carried out according to the GB/T1732-88 standard and is carried out by a hammer impact tester, wherein 1Kg50cm positive recoil is marked by 50+, positive recoil is marked by 50, and the like.
Example 1
A matting agent is produced from montan wax, and has an acid value of 5mg KOH/g, a saponification value of 90mg KOH/g, and a viscosity of 200Pa.s at 120 ℃.
Example 2
A delustering agent comprises the following raw materials in parts by weight: wax powder 82 and an emulsifier 18, wherein the wax powder is palm wax and montan wax, and the emulsifier is span 20 and sucrose monofatty acid ester.
Example 3
A delustering agent comprises the following raw materials in parts by weight: wax powder 95 and an emulsifier 5, wherein the wax powder is paraffin wax, polyethylene wax and montan wax, and the emulsifier is tween 80, sucrose benzoate and lauryl phosphate;
the acid value of the montan wax was 20mg KOH/g, the saponification value was 130mg KOH/g, and the viscosity at 120 ℃ was 400 mPa.s.
Example 4
A delustering agent comprises the following raw materials in parts by weight: licowax OP 3200 parts and fatty alcohol ether phosphate MOA-9P 180 parts.
Example 5
A delustering agent comprises the following raw materials in parts by weight: licowax OP 3200 parts and fatty alcohol ether phosphate MOA-3P 180 parts.
Example 6
An HAA system extinction powder coating comprises the following raw materials in parts by weight: 139 parts of carboxyl-containing polyester resin, 5 parts of N, N, N ', N' -tetra (beta-hydroxyethyl) adipamide, 18 parts of a delustering agent, 1088 parts of flatting agent AHA P5, 41003 parts of benzoin AHA, 175 parts of barium sulfate and 3 parts of carbon black, wherein the delustering agent is the delustering agent in the embodiment 1;
the glass transition temperature Tg of the carboxyl group-containing polyester resin was 60 ℃.
Example 7
An HAA system extinction powder coating comprises the following raw materials in parts by weight: 423 parts of carboxyl-containing polyester resin, 27 parts of N, N, N ', N' -tetra (beta-hydroxypropyl) adipamide, 70 parts of a delustering agent, 1088 parts of flatting agent AHA, 5 parts of P5 parts of benzoin AHA 41003 parts of barium sulfate and 3 parts of carbon black, wherein the delustering agent is the delustering agent in the embodiment 3;
the glass transition temperature Tg of the carboxyl group-containing polyester resin was 40 ℃.
Example 8
An HAA system extinction powder coating comprises the following raw materials in parts by weight: polyester resin containing carboxyl SJ 5122300 parts, hydroxyalkyl amide curing agent AHA 655216 parts, flatting agent 34 parts, flatting agent AHA1088P5 parts, benzoin AHA 41003 parts, barium sulfate 175 parts and carbon black 3 parts, wherein the flatting agent is the flatting agent in the embodiment 4.
Example 9
A HAA system matting powder coating composition was prepared as described in example 5 above with the exception of example 8.
Comparative example 1
A HAA system powder coating, without matting agent, was prepared as in example 8.
The suppliers of the raw materials in examples 8-9, comparative example 1 are as follows:
| name (R) | Suppliers of goods |
| Carboxyl group-containing polyester resin SJ5122 | Anhui god sword |
| Hydroxyalkyl amide curing agent AHA6552 | Huaan Anhui |
| Leveling agent AHA1088P | Huaan Anhui |
| Benzoin AHA4100 | Guizhou Huajia |
| Barium sulfate | Guizhou Huajia |
Experimental example 1
The samples of examples 8 to 9 and comparative example 1 were each charged into a twin-screw extruder (model: SLJ-30A, Nicotiana) for testing, melted and homogenized, tabletted, cooled, milled into fine powder, passed through a 180-mesh sieve, electrostatically sprayed onto a degreased cold-rolled steel plate, and cured at 200 ℃ for 15 min. The properties of the coatings were examined and the results are given in the following table:
the results in the table show that the invention can greatly reduce the gloss range of the powder coating, the gloss range is far less than 30%, and when the gloss range is very low, the mechanical property is not affected, and the mechanical property is good; the invention is prepared by a one-step extrusion method, has simple and convenient operation process, can realize lower gloss, and has good reproducibility and mechanical property.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The application of the flatting agent in HAA system powder coating is characterized in that the raw materials of the flatting agent consist of wax powder and an emulsifier;
wherein the wax powder comprises montan wax;
wherein, the content of the emulsifier in the flatting agent is 5-18%;
wherein the emulsifier is at least one of sorbitol fatty acid ester emulsifier, phospholipid emulsifier, phosphate ester emulsifier, and glycolipid emulsifier.
2. A matting agent according to claim 1, characterised in that said phosphate ester type emulsifier comprises: fatty alcohol ether phosphate, phenol ether phosphate, isotridecyl alcohol phosphate, lauryl phosphate, fatty alcohol ether phosphate potassium salt, phenol ether phosphate, isotridecyl alcohol phosphate potassium salt, lauryl phosphate potassium salt, cetostearyl alcohol phosphate or tetradecanol phosphate.
3. A matting agent according to claim 1 or 2, characterised in that the content of emulsifier in the matting agent is 8-11%.
4. A HAA system extinction powder coating is characterized by comprising the following raw materials: carboxyl-containing polyester resin, hydroxyalkylamide curing agents, matting agents, additives, and/or pigments and fillers, wherein the additives comprise: leveling agents, plasticizers, stabilizers or deaerators; a matting agent according to any one of claims 1 to 3.
5. A matted powder coating according to claim 4, wherein said carboxyl group containing polyester resin has an acid number in the range of 10 to 100mg KOH/g; wherein the glass transition temperature Tg of the carboxyl-containing polyester resin is 40-80 ℃.
6. A HAA system matting powder coating according to claim 4 or 5, wherein said carboxyl group-containing polyester resin is obtained by condensation of a dibasic acid and a polyhydric alcohol.
7. A HAA system matted powder coating according to claim 4 or 5, wherein the hydroxyalkylamide curing agent has the formula:
wherein A is a hydrogen atom, an alkyl group having 1 to 60 carbon atoms, an aryl group or an alkenyl group, and R is1Is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a hydroxyalkyl group having 1 to 5 carbon atoms, R2Is hydrogen atom or methyl, n' is an integer of 0 to 2, and n is an integer of 1 to 10.
8. A HAA system matting powder coating according to claim 4 or 5 characterised in that the hydroxyalkylamide curing agent is at least one of N, N, N ', N' -tetrakis (. beta. -hydroxyethyl) adipamide, N, N, N ', N' -tetrakis (. beta. -hydroxypropyl) adipamide.
9. A HAA system matted powder coating according to claim 7, wherein A is (CH)2) m, wherein m is an integer of 1-10.
10. A HAA system matting powder coating according to claim 4 or 5 characterised in that the carboxyl group containing polyester resin is present in an amount of 40 to 60% by weight based on the total weight of the HAA system powder coating; the flatting agent accounts for 5-10% of the total weight of the HAA system powder coating; the weight ratio of the hydroxyalkyl amide curing agent to the carboxyl-containing polyester resin is 4-6: 94-96; the HAA system extinction powder coating is prepared according to a one-step extrusion method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910838549.0A CN110423498B (en) | 2019-09-05 | 2019-09-05 | Flatting agent for HAA system powder coating and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910838549.0A CN110423498B (en) | 2019-09-05 | 2019-09-05 | Flatting agent for HAA system powder coating and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110423498A CN110423498A (en) | 2019-11-08 |
| CN110423498B true CN110423498B (en) | 2021-10-29 |
Family
ID=68418770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910838549.0A Active CN110423498B (en) | 2019-09-05 | 2019-09-05 | Flatting agent for HAA system powder coating and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110423498B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111004565A (en) * | 2019-12-28 | 2020-04-14 | 安徽省华安进出口有限公司 | TMMGU system extinction outdoor weather-resistant powder coating |
| CN111040608A (en) * | 2019-12-28 | 2020-04-21 | 安徽省华安进出口有限公司 | Polyurethane system extinction outdoor weather-resistant powder coating |
| CN111004564A (en) * | 2019-12-28 | 2020-04-14 | 安徽省华安进出口有限公司 | Extinction low-temperature curing outdoor weather-resistant powder coating |
| CN113621263A (en) * | 2021-08-20 | 2021-11-09 | 梧州市泽和高分子材料有限公司 | Extinction auxiliary agent for beta-Hydroxyalkylamide (HAA) powder coating body using carboxyl acrylic resin as main body |
| JP7038250B1 (en) | 2021-11-24 | 2022-03-17 | 日本ペイント・インダストリアルコ－ティングス株式会社 | Gloss Adjusting Powder Coating Composition, Painted Articles with Gloss Adjusting Curing Coating Film, and Method for Forming Gloss Adjusting Curing Coating Film |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429257A (en) * | 2000-05-12 | 2003-07-09 | 科莱恩有限公司 | Use of wax mixtures for coatings |
| CN103694766A (en) * | 2013-11-28 | 2014-04-02 | 六安科瑞达新型材料有限公司 | Flatting agent for polyester-hydroxyalkylamide type powder coating and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001262073A (en) * | 2000-03-01 | 2001-09-26 | Clariant Gmbh | Preparation of pigmented powder coating material |
| DE10216118A1 (en) * | 2002-04-12 | 2004-04-22 | Clariant Gmbh | Use of metallocene waxes in powder coatings |
| PL2635646T3 (en) * | 2010-11-02 | 2015-12-31 | Akzo Nobel Coatings Int Bv | Matte textured powder monocoat coating compositions |
| CN105419586B (en) * | 2015-12-30 | 2018-11-09 | 老虎表面技术新材料（苏州）有限公司 | Thermosetting property anion powder coating of park grade and preparation method thereof |
| CN108178970A (en) * | 2017-12-01 | 2018-06-19 | 成都信达高分子材料有限公司 | A kind of extra-weather-proof β hydroxyalkyl amides curing type powdery paints |
-
2019
- 2019-09-05 CN CN201910838549.0A patent/CN110423498B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429257A (en) * | 2000-05-12 | 2003-07-09 | 科莱恩有限公司 | Use of wax mixtures for coatings |
| CN103694766A (en) * | 2013-11-28 | 2014-04-02 | 六安科瑞达新型材料有限公司 | Flatting agent for polyester-hydroxyalkylamide type powder coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110423498A (en) | 2019-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110423498B (en) | Flatting agent for HAA system powder coating and application thereof | |
| CN101175816B (en) | Thermosetting powder compositions | |
| US20080233300A1 (en) | Thermosetting powders comprising curing agent adducts of polyesters and strong, flexible powder coatings made therefrom | |
| AU761492B2 (en) | Powder coating compositions | |
| CN108570277B (en) | Durable thermosetting powder coating compositions | |
| US20160264816A1 (en) | Polyester Resin for Highly Filled Powder Coating | |
| US20120070630A1 (en) | Powder coating composition comprising a polyester and a beta-hydroxyalkylamide as crosslinker | |
| US20080286481A1 (en) | Thermosetting powder compositions for coatings | |
| CN111040608A (en) | Polyurethane system extinction outdoor weather-resistant powder coating | |
| US9353254B1 (en) | Powder coating flow aid | |
| CN111363456B (en) | HAA system powder coating with improved coating surface pinhole defects | |
| PL173087B1 (en) | Thermally hardenable coating composition in powdered form | |
| CN111040591A (en) | HAA system extinction outdoor weather-resistant powder coating | |
| US20210380818A1 (en) | Pro gel cap style multifunctional composition | |
| CN111040593A (en) | Extinction transparent outdoor weather-resistant powder coating | |
| WO2011110089A1 (en) | Powder coating having anodized look | |
| CN103122206A (en) | Environment-friendly super weather-proof powder paint composition and preparation method | |
| CN111004564A (en) | Extinction low-temperature curing outdoor weather-resistant powder coating | |
| US20060217520A1 (en) | Thermosetting powder compositions for coatings | |
| CN102051108A (en) | High luster and high leveling powder coating | |
| CN110591515A (en) | Outdoor ultralow-temperature curing extinction powder coating | |
| CN114410195A (en) | High-gloss and high-leveling powder coating composition with brilliant color effect and coating thereof | |
| US11008474B2 (en) | Multi-purpose flexibility additive for chemical coating compositions | |
| CN114958160B (en) | Extinction powder coating and preparation method thereof | |
| CN113736348B (en) | GMA system powder coating with smooth moire texture effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |