CN103409044B - A kind of powder coating with high pencil hardness - Google Patents
A kind of powder coating with high pencil hardness Download PDFInfo
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- CN103409044B CN103409044B CN201310285361.0A CN201310285361A CN103409044B CN 103409044 B CN103409044 B CN 103409044B CN 201310285361 A CN201310285361 A CN 201310285361A CN 103409044 B CN103409044 B CN 103409044B
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Abstract
The invention discloses a kind of powder coating with high pencil hardness, is the proportioning of each component counted by weight: hydroxyl value is 200-350mg? 150 ~ 200 parts, the vibrin of KOH/g, does is hydroxyl value 30-50mg? 300 ~ 350 parts, the vibrin of KOH/g, Hardening material 60 ~ 100 parts, 200 ~ 250 parts, solidifying agent, filler 200 ~ 250 parts, pigment 0.5 ~ 1 part, flow agent 8 ~ 12 parts, air release agent 2-6 part.The present invention uses high-hydroxyl-value polyester resin as filmogen, increases cross-linking density, and adopt the PTFE wax that Hardening material substitution is traditional, improve the pencil hardness of coating, after measured, hardness can reach 5H – 9H simultaneously.The powder coating that the present invention obtains can be widely used in as high-grade public arenas such as subway station, high ferro station, terminals; Also can be used for engineering machinery forklift, grab trolley, spade etc.
Description
Technical field
The present invention relates to a kind of powder coating, be specifically related to a kind of powder coating with high pencil hardness.
Background technology
Thermosetting powder coating(s) is all be made up of filmogen, solidifying agent, flow agent, pigment, filler, auxiliary agent, surperficial style agent and other improvement in performance agent etc.All components are normally placed in high-speed mixer for dry mixing by preparation together, then, compressing tablet mixing by suitable forcing machine heat fusing, pulverize and sieve.The powder coating made like this can make it stick on ground by powder static electricity rifle, the spraying of friction rifle or fluidized bed dipping, and normally metallic surface, then heating or radiation curing form film.
Generally, the coating formed by above step has good decorative plate provide protection, can meet the requirement of multiple application.But in the Application Areas that some are special; as the health metope of below the 1.8m of the high-grade public arenas such as subway station terminal; because protective coating inevitably will suffer object or person to be shock, the friction of factor; all the surface in coating is left cut or wound; cause the decline of decoration and protected effect; therefore manage to improve existing powder coating, the hardness improving coating is very important.
Improve the hardness of coating, current usual method in coating, adds mineral filler or wax as Hardening agent.Diamond, silicon carbide and porcelain powder is added as anti-wear agent as US Patent No. 2002137872 discloses; US20030055168 discloses and adds the resistance to marring that a kind of triamino formyl triazine improves coating; US6761764 openly uses polyethylene wax or oxidized polyethlene wax from different montanin waxs as Hardening agent; US2006078748 discloses and uses the nano-silicon particle be dispersed in aminoresin as scratch resistant additive.Chinese patent CN101942262 discloses and adds the surface hardness that one or more fluorocarbon resins, one or more glass microballons, ceramic microsphere and main component are the particular fillers raising coatings of nephelinite; CN102585672 discloses by adding the filler such as Polytetrafluoroethylene emulsion and wollastonite, adds the hardness of coating.But these effects improving the hardness of coating are quite limited, still can not meet the particular requirement in some fields of high rigidity.
Therefore a kind of powder coating with high rigidity is provided to be the technology that industry is thirsted for always.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of powder coating with high pencil hardness, the service requirements of the occasions such as subway station, high ferro station, terminal can be met.
For achieving the above object, the present invention takes following technical scheme:
A kind of powder coating with high pencil hardness, the proportioning of each component is counted by weight: hydroxyl value is 150 ~ 200 parts, the vibrin of 200-350mgKOH/g, hydroxyl value is 300 ~ 350 parts, the vibrin of 30-50mgKOH/g, Hardening material 60 ~ 100 parts, 200 ~ 250 parts, solidifying agent, filler 200 ~ 250 parts, pigment 0.5 ~ 1 part, flow agent 8 ~ 12 parts, air release agent 2-6 part.
Filmogen is the basis forming coating, decides the fundamental characteristics of coating.Feature of the present invention is in filmogen, use high-hydroxyl-value polyester resin (200-350mgKOH/g), increases its cross-linking density, improves the pencil hardness of coating.On the other hand, suitable Hardening material is adopted to improve the pencil hardness of coating further in the present invention.
As preferably, the proportioning of each component is counted by weight: hydroxyl value is 150 ~ 200 parts, the vibrin of 300-350mgKOH/g, hydroxyl value is 320 ~ 350 parts, the vibrin of 40mgKOH/g, Hardening material 80 parts, 220 ~ 230 parts, solidifying agent, filler 200 ~ 250 parts, pigment 0.5-1 part, flow agent 10 parts, air release agent 3 parts.
Traditional powder coating adopts PTFE wax powder as Hardening agent usually, and Hardening material preferably described in the present invention is one or more in boron nitride, silicon carbide, bismuth oxide, and this several material has higher hardness, can significantly improve the pencil hardness of coating.
The selection of solidifying agent will be determined according to the structure of resin, and the active group in solidifying agent and the active group in resin carry out crosslinking reaction, generates cross-linked network structure.
As a kind of optimal way, described solidifying agent is triglycidyl isocyanurate (TGIC).
As another kind of optimal way, described solidifying agent is the one in blocked isocyanate, hydroxyl phthalein amine hardener.Preferred consolidation agent of the present invention is blocked isocyanate (B-1530).
As preferably, described filler is titanium dioxide, adds the mechanical property that a certain amount of filler can increase coating in powder coating, and titanium dioxide also constitutes the background color of coating simultaneously.
Described pigment is that iron is green, one or more in iron oxide red, phthalocyanine green, phthalocyanine blue, carbon black.To regulate and control the color of coating further.
Described flow agent, as a kind of auxiliary agent, can impel coating in drying and forming-film process, form smooth, smooth, a uniform film.The preferred flow agent of the present invention is the PV88 of imported from America.
Described air release agent, as a kind of auxiliary agent, can make film have the sufficiently long time to allow air escape out from film when constant expansion.Air release agent of the present invention is st-yrax.
Through measuring, after described coating is used for product surface, hardness can reach 5H – 9H.This powder coating can be widely used in various special occasions, as: the following health metope of the high-grade public arena 1.8m such as subway station, high ferro station, terminal or Bao Zhu, engineering machinery forklift, grab trolley, spade etc.
Embodiment
For a better understanding of the present invention, set forth the solution of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Wherein test item adopts following examination criteria:
Hardness: standard GB/T/T6739-2006;
Glossiness: standard GB/T/T9754-2007;
Shock strength: standard GB/T/T1732-1993.
Embodiment 1:
Consisting of (by weight) of powder coating: hydroxyl value is the high-hydroxyl-value polyester resin 150 parts of 200mgKOH/g, hydroxyl value is 350 parts, the vibrin of 40mgKOH/g, 225 parts, triglycidyl isocyanurate (TGIC) solidifying agent, PV88 flow agent 8 parts, titanium dioxide 230 parts, iron oxide red 0.5 part, carbon black 0.01 part, Hardening material oxidation bismuth 80 parts; Air release agent st-yrax 4 parts.
Use twin screw extruder mixing extrusion, extrusion temperature is one section of 90-100 DEG C, two sections of 100-110 DEG C, three sections of 110-120 DEG C, compression ratio 15/1, extrudes compressing tablet, with ACM pulverizing mill abrasive dust, granularity 180 order, size-grade distribution: >32 micron account for 30-50%.Aluminium or iron material spray, solidification value 220 DEG C 10 minutes.Mensuration correlated performance is as follows: frontal impact (50Kg) >50, gloss 15%, pencil hardness 5H.
Embodiment 2:
The high hydroxy polyester resin of consisting of (by weight) of powder coating: hydroxyl value 300mgKOH/g 200 parts, the hydroxy polyester resin of hydroxyl value 40mgKOH/g 350 parts, 225 parts, blocked isocyanate (B-1530) solidifying agent, PV88 flow agent 10 parts, titanium dioxide 230 parts, dark green 0.5 part of phthalein, carbon black 0.01 part, Hardening material oxidation bismuth 80 parts; Air release agent st-yrax 3 parts.
Use twin screw extruder mixing extrusion, extrusion temperature is one section of 90-100 DEG C, two sections of 100-110 DEG C, three sections of 110-120 DEG C, compression ratio 15/1, extrudes compressing tablet, with ACM pulverizing mill abrasive dust, granularity 180 order, size-grade distribution: >32 micron account for 30-50%.Aluminium or iron material spray, solidification value 220 DEG C 10 minutes.Mensuration correlated performance is as follows: frontal impact (50Kg) >50, gloss 12%, pencil hardness 6H.
Embodiment 3:
The high hydroxy polyester resin of consisting of (by weight) of powder coating: hydroxyl value 320mgKOH/g 150 parts, the hydroxy polyester resin of hydroxyl value 40mgKOH/g 350 parts, 200 parts, blocked isocyanate (B-1530) solidifying agent, PV88 flow agent 10 parts, titanium dioxide 230 parts, dark green 0.5 part of phthalein, carbon black 0.01 part, Hardening material boron nitride 80 parts; Air release agent st-yrax 3 parts.
Use twin screw extruder mixing extrusion, extrusion temperature is one section of 90-100 DEG C, two sections of 100-110 DEG C, three sections of 110-120 DEG C, compression ratio 15/1, extrudes compressing tablet, with ACM pulverizing mill abrasive dust, granularity 180 order, size-grade distribution: >32 micron account for 30-50%.Aluminium or iron material spray, solidification value 220 DEG C 10 minutes.Mensuration correlated performance is as follows: frontal impact (50Kg) >50, gloss 8%, pencil hardness 8H.
Embodiment 4:
The high hydroxy polyester resin of consisting of (by weight) of powder coating: hydroxyl value 350mgKOH/g 200 parts, the hydroxy polyester resin of hydroxyl value 40mgKOH/g 320 parts, 225 parts, blocked isocyanate (B-1530) solidifying agent, PV88 flow agent 10 parts, titanium dioxide 230 parts, dark green 0.5 part of phthalein, carbon black 0.01 part, Hardening material boron nitride 80 parts; Air release agent st-yrax 3 parts.
Use twin screw extruder mixing extrusion, extrusion temperature is one section of 90-100 DEG C, two sections of 100-110 DEG C, three sections of 110-120 DEG C, compression ratio 15/1, extrudes compressing tablet, with ACM pulverizing mill abrasive dust, granularity 180 order, size-grade distribution: >32 micron account for 30-50%.Aluminium or iron material spray, solidification value 220 DEG C 10 minutes.Mensuration correlated performance is as follows: frontal impact (50Kg) >50, gloss 5%, pencil hardness 9H.
Claims (5)
1. one kind has the powder coating of high pencil hardness, it is characterized in that, the proportioning of each component is counted by weight: hydroxyl value is 150 ~ 200 parts, the vibrin of 200-350mgKOH/g, hydroxyl value is 300 ~ 350 parts, the vibrin of 30-50mgKOH/g, Hardening material 60 ~ 100 parts, 200 ~ 250 parts, solidifying agent, filler 200 ~ 250 parts, pigment 0.5 ~ 1 part, flow agent 8 ~ 12 parts, air release agent 2-6 part;
Described Hardening material is one or more in boron nitride, silicon carbide, bismuth oxide;
Described solidifying agent is blocked isocyanate.
2. the powder coating with high pencil hardness according to claim 1, it is characterized in that, the proportioning of each component is counted by weight: hydroxyl value is 150 ~ 200 parts, the vibrin of 300-350mgKOH/g, hydroxyl value is 320 ~ 350 parts, the vibrin of 40mgKOH/g, Hardening material 80 parts, 220 ~ 230 parts, solidifying agent, filler 200 ~ 250 parts, pigment 0.5-1 part, flow agent 10 parts, air release agent 3 parts.
3. the powder coating with high pencil hardness according to claim 1, is characterized in that, described filler is titanium dioxide.
4. the powder coating with high pencil hardness according to claim 1, is characterized in that, described pigment is that iron is green, one or more in iron oxide red, phthalocyanine green, phthalocyanine blue, carbon black.
5. the powder coating with high pencil hardness according to claim 1, is characterized in that, described air release agent is st-yrax.
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| CN112391109A (en) * | 2019-08-15 | 2021-02-23 | 德汇新材料科技南通有限公司 | Ultrahigh-hardness powder coating and preparation method thereof |
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| CN104356916A (en) * | 2014-11-21 | 2015-02-18 | 广东华江粉末科技有限公司 | High-gloss polyurethane heat transfer printing powder paint for aluminium profile and preparation method thereof |
| CN106519928B (en) * | 2016-11-29 | 2018-11-06 | 安徽神剑新材料股份有限公司 | One kind can repair powdery paints, preparation method and applications |
| CN109161309A (en) * | 2018-08-24 | 2019-01-08 | 六安科瑞达新型材料有限公司 | A kind of open air scratch-resistant powdery paints |
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| CN116694218A (en) * | 2023-07-12 | 2023-09-05 | 遵义春华新材料科技有限公司 | Matte powder coating for perfume display rack and preparation method and application thereof |
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| TW242644B (en) * | 1992-10-30 | 1995-03-11 | Ppg Industries Inc | |
| US20020137872A1 (en) * | 2000-12-08 | 2002-09-26 | Schneider John R. | Coating compositions providing improved mar and scratch resistance and methods of using the same |
| US6699942B2 (en) * | 2001-09-14 | 2004-03-02 | Ppg Industries Ohio, Inc. | Powder coating compositions demonstrating improved mar resistance |
| CN101333411A (en) * | 2008-07-30 | 2008-12-31 | 惠阳千叶松实业有限公司 | High-hardness high-light double-component polyurethane black light top coat top coat and method for preparing same |
| JPWO2010047195A1 (en) * | 2008-10-24 | 2012-03-22 | 関西ペイント株式会社 | Coating composition and coating film forming method |
| CN101942262B (en) * | 2010-08-30 | 2013-04-03 | 杜邦华佳化工有限公司 | Powder paint with high surface harness and decoration |
| CN102363709B (en) * | 2011-07-01 | 2014-06-25 | 深圳市美丽华油墨涂料有限公司 | Polyurethane paint with elastic hand feeling used for painting and application thereof |
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| CN112391109A (en) * | 2019-08-15 | 2021-02-23 | 德汇新材料科技南通有限公司 | Ultrahigh-hardness powder coating and preparation method thereof |
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Inventor after: Chen Guofei Inventor after: Fang Shengzhong Inventor after: Liu Jiangtao Inventor after: Wang Kun Inventor after: Zhou Yu Inventor before: Chen Guofei Inventor before: Fang Shengzhong Inventor before: Liu Jiangtao |
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