CN109517493A - A kind of high rigidity compound resin-epoxy powder coating composition, preparation method and applications - Google Patents
A kind of high rigidity compound resin-epoxy powder coating composition, preparation method and applications Download PDFInfo
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- CN109517493A CN109517493A CN201710835307.7A CN201710835307A CN109517493A CN 109517493 A CN109517493 A CN 109517493A CN 201710835307 A CN201710835307 A CN 201710835307A CN 109517493 A CN109517493 A CN 109517493A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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Abstract
The invention discloses a kind of high rigidity compound resin-epoxy powder coating compositions and its preparation method and application, and the coating composition includes following components: polyester-epoxy resin, epoxy resin A, epoxy resin B, polytetrafluoroethylwax wax, auxiliary agent, pigment, hardening filler.The coating composition the preparation method comprises the following steps: polyester-epoxy resin, epoxy resin A, epoxy resin B, polytetrafluoroethylwax wax, auxiliary agent, pigment, hardening filler are uniformly mixed, after successively carrying out melting extrusion, tabletting, cooling, coarse crushing, levigate crushing and screening, the high rigidity powdery paints is obtained.High rigidity powdery paints of the invention is outstanding for the hardness performance of substrate, the adhesive force of high rigidity powdery paints and substrate reaches best, it is good for the adhesive property of substrate, hardness performance is good, the weather resistance of coating is not affected, with good scratch-resistant effect, avoid because coating by external force scrape due to cause coating the bad problem of performance generation.
Description
Technical field
The invention belongs to technical field of paint preparation more particularly to a kind of high rigidity compound resin-epoxy powder coatings
Composition, preparation method and applications.
Background technique
Sports equipment, general industry (include car body interior trim, household electrical appliance etc.), furniture, be easy by external influence and
It causes to scrape, in turn results in the scratch of film coated surface, not only influenced the beauty of appearance member, but also be easy to cause the destruction of coating, in turn
The service performance of appearance member is impacted.
Powdery paints industry prepares high rigidity product, and the method that can especially reach 4H pencil hardness product is generally following
3 kinds of situations:
1, polyurethane system:
Using polyurethane, this system crosslink density is high, it is easy to accomplish the pencil hardness of 4H, but this method exists
Disadvantage at high cost, the cost of polyurethane products are generally 3-4 times or so of conventional polyester-epoxy-resin systems；Furthermore due to
The compatibility of polyurethane system and polyester-epoxy systems or polyester system is bad, and polyurethane body is caused to tie up to production and construction now
The use of field is all more troublesome.
2, acrylic system:
Acrylic system is suitable with polyurethane system in terms of coating hardness, but price is more higher than polyurethane system,
It is the system that price is the most expensive in current powdery paints, and the product is extremely strong to the contamination of products of other systems, needs
The production and use of individual workshop and painting workshop.It is only used in automobile product so this system is general, it is other
Industry rarely application case.
3, conventional polyester-epoxy systems:
This system, which is presently the most, is praised highly, cheap, and is also the most commonly used system of powder industry.But
Be since polyester-epoxy systems crosslink density is low, can not match in excellence or beauty completely currently on the market polyurethane or acrylic system
Product, even if thering is manufacturer to promise to undertake that product can achieve 4H, but this index is typically all to evaluate so that whether coating is scratched,
Rather than whether coating is scratched.Coating cannot be reached and scratch rank to be since resin system is in solidification process the reason of evaluation
It is middle to be migrated to coating surface, cause the hardening filler ratio of coating most surface theoretically less, and this kind of system is leaned on completely at present
Increase filler to enhance hardness, so the hardness of coating surface can not all compare favourably with acrylic system or polyurethane system.
In view of this, having higher hard it is necessary to provide a kind of high rigidity compound resin-epoxy powder coating composition
Degree, to be suitable for the needs of appearance member coating.
Summary of the invention
In order to overcome the drawbacks of the prior art, the object of the present invention is to provide a kind of high rigidity compound resin-epoxy type powder
Last coating composition.
It is a further object to provide a kind of high rigidity compound resin-epoxy powder coating compositions
Preparation method.
A further object of the present invention is to provide a kind of using the high rigidity compound resin-epoxy powder coating combination
The purposes of object.
In order to achieve the above objectives, below the technical solution adopted by the present invention:
A kind of high rigidity compound resin-epoxy powder coating composition comprising the component of following parts by weight:
The acid value of the polyester-epoxy resin is 72~78mgKOH/g, preferably 75mgKOH/g.
The epoxide number equivalent of the epoxy resin A is 750~830g/eq, preferably 780g/eq.
The epoxide number equivalent of the epoxy resin B is 195~220g/eq, preferably 205g/eq.
The purity of the polytetrafluoroethylwax wax is not less than 99%.
The Morse hardness of the hardening filler is 5.0~6.0.
The hardening filler is selected from least one of silica, aluminium oxide, wollastonite, silica flour and Ming Nai powder.
The auxiliary agent includes each component of following parts by weight:
The pigment is at least one of titanium dioxide or carbon black, titanium dioxide and carbon black or other colorants, row industry personnel
It can according to need and selected.
High rigidity compound resin-epoxy powder coating composition of the invention can make coating pencil hardness reach 4H not
The rank being scratched.Relative to polyurethane system and acrylic system, due to entire high rigidity compound resin system crosslink density
Without so high, so resistance to bend(ing) will can obviously be got well, and good with common product compatibility, without using special production and painting
Fill environment；And the product is suitable with conventional polyester-epoxy-resin systems price, well below polyurethane and acrylic system
Price.Since the epoxy resin B content that the present invention uses is 10.0~15.0%, softening point only has 85~95 DEG C, and product is only
To be more than 5%, the glass transition temperature of whole system will be dragged down, lead to the generation of powder clustering phenomena.So height of the invention
Hardness compound resin-epoxy powder coating composition need to keep in transit and in storage limiting temperature be 20 DEG C with
Under.
High rigidity compound resin-epoxy powder coating composition hardness in the present invention can reach 4H coating and not drawn
Wound, compares favourably with acrylic system and polyurethane system hardness, essentially consists in three aspect reasons:
First, higher crosslink density:
To guarantee that the present invention devises following scheme compared with high crosslink density:
1, the polyester resin for the use of acid value being 72~78mgKOH/g, this kind of polyester resin are 50~56mgKOH/g than acid value
Resin, it is higher with epoxy resin cure reaction post-crosslinking density；
2, the epoxy resin B for the use of epoxide equivalent being 195~220g/eq, the epoxy resin of low epoxide equivalent high epoxy value
Could fundamentally guarantee coating has a higher crosslink density, but to avoid using excessively causing coating crosslink density excessively high and
Keep coating brittleness excessive, content controls within 15% as far as possible.
Second, using hardening filler:
Hardening filler generally selects the mixture of silica/alumina, and the Mohs' hardness of such filler is 5.0-6.0,
It is preferred that 5.5 or so.When not using the mixture of silica/alumina, silica or silica flour or bright resistance to also can be selected
Powder, but these three do not have the mixture effect of silica/alumina more preferable.
Third, polytetrafluoroethylwax wax is added:
The existing higher hardness of polytetrafluoroethylwax wax, and have good smoothness, to coating hardening effect and resistance to after addition
Friction effect is extremely helpful.
Another aspect of the present invention provides a kind of high rigidity compound resin-epoxy powder coating composition
Preparation method comprising following steps:
It will match polyester resin, epoxy resin A, epoxy resin B；It is polytetrafluoroethylwax wax, high functional group epoxy resin, different
Cyanate ester dimer, auxiliary agent, pigment, hardening filler after mixing, successively carry out melting extrusion, tabletting, cooling, rough and torn comminution
Finely divided and screening, obtains the high rigidity powdery paints.
Preferably, the temperature of the melting extrusion is 90~100 DEG C.
The third aspect of the invention provide a kind of high rigidity compound resin-epoxy powder coating composition apply with
The method for forming coating comprising following steps:
After appearance member is surface-treated, the high rigidity compound resin-epoxy powder coating composition is sprayed,
It is toasted at 180~210 DEG C, is then cooled down, obtain the coating.
Due to the adoption of the above technical scheme, the present invention has the following advantages and beneficial effects:
High rigidity compound resin-epoxy powder coating composition of the invention is outstanding for the hardness performance of substrate, high
The adhesive force of hardness powder paint compositions and substrate reaches best, good for the adhesive property of substrate, hardness performance is good, coating
Weather resistance be not affected, have good scratch-resistant effect, avoid because coating by external force scrape due to lead to coating
The generation of the bad problem of performance；When being applied to appearance member, can be carried out on the basis of existing outdoor powder-product spraying process, no
Change in-situ spraying technique；Hardness is carried out to high rigidity compound resin-epoxy powder coating composition coating of the invention
Test, the results showed that can achieve pencil hardness 4H (by GB/T 6,379 2006), the hardness performance of coating is good.
Specific embodiment:
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that the present embodiment is served only for
To further explanation of the invention, it should not be understood as limiting the scope of the invention, the person skilled in the art in the field can
To make some nonessential modifications and adjustment to the present invention according to the content of aforementioned present invention.
Raw material information: the relevant information of raw material used in the embodiment of the present invention is listed below.It retouches for convenience
It states, the product name or their corresponding title abbreviations of raw material has been used in embodiment.The molecular weight of resin or polymer is logical
Gel permeation chromatography measurement is crossed to obtain.
(i) Guangzhou Kinte Material Technology Co., Ltd. may be selected in polyester-epoxy resin in the embodiment of the present invention
NH2582, the P5127 of DSM N. V., the satisfactory polyester resin of the acid values such as P5086 of Zhong Fa Canaan Co., Ltd；
(ii) South Asia chemical industry 303L may be selected in the epoxy resin A in the embodiment of the present invention, and the permanent remote E12 in Anhui or triumph are had an area of
E12 etc.；
(iii) NPCN704 of Taiwan South Asia Co., Ltd may be selected in the epoxy resin B in the embodiment of the present invention；
(iv) SST-3D or Nanjing day poem of three leaf company, the U.S. may be selected in the polytetrafluoroethylwax wax in the embodiment of the present invention
The PTFE0101 of new material Science and Technology Ltd..It is the SST-3D of three leaf company, the U.S. used in case of the present invention；
(vii) GLP588 of Ningbo South-sea Chemical Co., Ltd., the industry may be selected in the levelling agent in the embodiment of the present invention
Personnel can choose other producers and model；The 701 of Ningbo South-sea Chemical Co., Ltd. may be selected in brightener, and industry personnels can
To select other producers and model；Styrax systematic naming method is 2- hydroxyl -1,2- diphenylethan, and Ningbo South Sea chemistry may be selected
Co., Ltd, industry personnels can choose other producers and model；Desiccant may be selected to win wound Degussa (Evonik
Degussa aluminium oxide C (AEROSIL Alu C)), industry personnels can choose other producers and model；Hardening filler can
The CP30 of Chongqing City Jin Yi silicon materials development corporation, Ltd. is selected, which is the compound of silica and aluminium oxide；Pigment
For at least one of titanium dioxide or carbon black, titanium dioxide and carbon black or other colorants, row industry personnel can according to need progress
Selection.
Embodiment 1
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 1
Point:
Table 1
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | P5127 | 40.4 |
| Epoxy resin A | E12 | 10.4 |
| Epoxy resin B | NPCN704 | 10 |
| Polytetrafluoroethylwax wax | SST-3D | 1.0 |
| Auxiliary agent | 588+701+ styrax | 2.2 |
| Carbon black | HB2185 | 1.0 |
| Hardening filler | CP30 | 35 |
Firstly, accurately weighing raw material according to 1 recipe ingredient of table, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder by (doing time in advance 5~10 minutes), in 90~100 DEG C of conditions
Lower melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet thick
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, 180 mesh screen mistakes
The screening natural cooling of sieve finally obtains the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170~200 DEG C, when
Between be 10~20min (minute)；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 2
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 2
Point:
Table 2
Firstly, accurately weighing raw material according to 2 recipe ingredient of table, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, under the conditions of 90-100 DEG C by (doing time in advance 5-10 minutes)
Melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet rough and torn
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, the sieving of 180 mesh screens
Screening natural cooling, finally obtain the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Aluminum veneer is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), spray in dust free room described high hard
Compound resin-epoxy powder coating composition to be spent, enters drying tunnel later and is toasted, the temperature of baking is 1980-210 DEG C,
Time is 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 3
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 3
Point:
Table 3
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | P5127 | 45.4 |
| Epoxy resin A | E12 | 7.9 |
| Epoxy resin B | NPCN704 | 12.5 |
| Polytetrafluoroethylwax wax | SST-3D | 1.0 |
| Auxiliary agent | 588+701+ styrax | 2.2 |
| Carbon black | HB2185 | 1.0 |
| Hardening filler | CP30 | 30 |
Firstly, accurately weighing raw material according to 3 recipe ingredient of table, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, under the conditions of 90-100 DEG C by (doing time in advance 5-10 minutes)
Melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet rough and torn
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, the sieving of 180 mesh screens
Screening natural cooling, finally obtain the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170-200 DEG C, the time
For 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 4
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 4
Point:
Table 4
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | P5127 | 45.4 |
| Epoxy resin A | E12 | 7.9 |
| Epoxy resin B | NPCN704 | 12.5 |
| Polytetrafluoroethylene emulsion | SST-3D | 0.5 |
| Auxiliary agent | 588+701+ styrax | 2.0 |
| Carbon black/titanium white | / | 10.0 |
| Hardening filler | CP30 | 21.7 |
Firstly, accurately weighing raw material according to 4 recipe ingredient of table, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, under the conditions of 90-100 DEG C by (doing time in advance 5-10 minutes)
Melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet rough and torn
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, the sieving of 180 mesh screens
Screening natural cooling, finally obtain the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170-200 DEG C, the time
For 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 5
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 5
Point:
Table 5
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | P5127 | 51.4 |
| Epoxy resin A | E12 | 6.4 |
| Epoxy resin B | NPCN704 | 15 |
| Polytetrafluoroethylene emulsion | SST-3D | 0.7 |
| Auxiliary agent | 588+701+ styrax | 2.0 |
| Carbon black/titanium white | HB2185 | 4.5 |
| Hardening filler | CP30 | 20 |
Firstly, accurately weighing raw material according to 5 recipe ingredient of table, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, under the conditions of 90-100 DEG C by (doing time in advance 5-10 minutes)
Melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet rough and torn
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, the sieving of 180 mesh screens
Screening natural cooling, finally obtain the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170-200 DEG C, the time
For 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 6
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 6
Point:
Table 6
Firstly, accurately weighing raw material according to 6 recipe ingredient of table, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder by (doing time in advance 5~10 minutes), in 90~100 DEG C of conditions
Lower melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet thick
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, 180 mesh screen mistakes
The screening natural cooling of sieve finally obtains the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170~200 DEG C, when
Between be 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 7
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 7
Point:
Table 7
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | P5086 | 45.4 |
| Epoxy resin A | 303L | 7.9 |
| Epoxy resin B | NPCN704 | 12.5 |
| Polytetrafluoroethylwax wax | SST-3D | 1.2 |
| Auxiliary agent | 588+701+ styrax | 2.0 |
| Carbon black | HB2185 | 1.0 |
| Hardening filler | CP30 | 30 |
Firstly, accurately weighing raw material according to the recipe ingredient of table 7, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, under the conditions of 90-100 DEG C by (doing time in advance 5-10 minutes)
Melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet rough and torn
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, the sieving of 180 mesh screens
Screening natural cooling, finally obtain the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170-200 DEG C, the time
For 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 8
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 8
Point:
Table 8
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | NH2582 | 45.4 |
| Epoxy resin A | 303L | 7.9 |
| Epoxy resin B | NPCN704 | 12.5 |
| Polytetrafluoroethylene emulsion | SST-3D | 1.0 |
| Auxiliary agent | 588+701+ styrax | 2.0 |
| Carbon black/titanium white | / | 10.0 |
| Hardening filler | CP30 | 21.2 |
Firstly, accurately weighing raw material according to the recipe ingredient of table 8, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, under the conditions of 90-100 DEG C by (doing time in advance 5-10 minutes)
Melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet rough and torn
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, the sieving of 180 mesh screens
Screening natural cooling, finally obtain the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170-200 DEG C, the time
For 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 9
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 9
Point:
Table 9
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | P5127 | 51.4 |
| Epoxy resin A | 303L | 6.4 |
| Epoxy resin B | NPCN704 | 15 |
| Polytetrafluoroethylene emulsion | SST-3D | 1.0 |
| Auxiliary agent | 588+701+ styrax | 2.2 |
| Carbon black/titanium white | HB2185 | 4.0 |
| Hardening filler | CP30 | 20 |
Firstly, accurately weighing raw material according to the recipe ingredient of table 9, high speed rotation is crossed in premixing tank back warp and is uniformly mixed
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, under the conditions of 90-100 DEG C by (doing time in advance 5-10 minutes)
Melting extrusion is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet rough and torn
It is broken, levigate crushing is carried out using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, the sieving of 180 mesh screens
Screening natural cooling, finally obtain the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170-200 DEG C, the time
For 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
Embodiment 10
A kind of high rigidity compound resin-epoxy powder coating composition, the group including following parts by weight shown in table 10
Point:
Table 10
Firstly, accurately weighing raw material according to the recipe ingredient of table 10, it is equal to cross high speed rotation mixing in premixing tank back warp
Uniformly mixed raw material, are then at the uniform velocity put into double screw extruder, in 90~100 DEG C of items by even (doing time in advance 5~10 minutes)
Melting extrusion under part is pressed into tablet after chill roll, after tablet is cooling under natural temperature, is carried out using pulverizer to tablet
Coarse crushing is carried out levigate crushing using pulverizer after obtained material is cooling, is sieved using 180 mesh screens, 180 mesh screens
The screening natural cooling of sieving finally obtains the high rigidity compound resin-epoxy powder coating composition of uniform particle sizes.
Ground is subjected to oil removing (or carrying out other pre-treatments such as silane treatment), carries out spraying the high rigidity in dust free room
Compound resin-epoxy powder coating composition enters drying tunnel later and is toasted, and the temperature of baking is 170~200 DEG C, when
Between be 10~20min；Natural cooling after abundant solidification to be coated, obtains the coating.
Hardness test is carried out to coating, highest can achieve pencil hardness 4H (by GB/T 6,379 2006), illustrate the painting
Layer hardness performance is excellent.
In all of above embodiment, the attainable performance indicator of the coating institute is as shown in the following Table 11:
Table 11
| Pencil hardness | Wear-resisting property | Bending property | Impact property | Adhesive force |
| 4H, no scuffing | 0.0050-0.0065g | 3mm, it is slight to crack | 30kgcm, slight crackle | 100/100 attachment |
Remarks: wear-resisting property test condition is wear resistant instrument weight bearing: 500g/wheel
Comparative example 1
A kind of powdery paints, the component including following parts by weight shown in table 12:
Table 12
| Component | Concrete model | Parts by weight |
| Polyurethane resin | Uralac P1580 | 24.5 |
| Polyester resin | REAFREE 17091 | 5 |
| Carbimide dimer | B1530 | 29.5 |
| Auxiliary agent | 588+701+ styrax | 2.3 |
| Carbon black/titanium white and other colorants | HB2185 | 5.5 |
| Barium sulfate filler | W44 | 33.2 |
This comparative example 1 is the method for the more powdery paints prepares coating 4H pencil hardness that the prior art uses, still
Polyester resin used in this method and carbimide dimer price are too high, and the bending property 3mm cracking of coating is more tight
Weight, 30kgcm, crackle are also more serious.Referring specifically to shown in table 13:
Table 13
| Pencil hardness | Wear-resisting property | Bending property | Impact property | Adhesive force |
| 4H, no scuffing | 0.0050-0.0065g | 3mm is serious to crack | 30kgcm, severe crack | 100/100 attachment |
Comparative example 2
A kind of powdery paints, the component including following parts by weight shown in table 14:
Table 14
| Component | Concrete model | Parts by weight |
| Polyester-epoxy resin | P5127 | 28 |
| Epoxy resin A | E12 | 28 |
| Polytetrafluoroethylene emulsion | SST-3D | 1 |
| Auxiliary agent | 588+701+ styrax | 2 |
| Carbon black | HB2185 | 1.7 |
| Hardening filler | Wollastonite | 39.3 |
In comparative example 2, although joined Polytetrafluoroethylene emulsion and hardening filler, due to not using the ring of high crosslink density
Oxygen resin NPCN704, the crosslink density of coating is inadequate, and coating cannot reach the pencil hardness of 4H, and wear-resisting property also wants far short of what is expected.
It is specific as shown in Table 15:
Table 15
High rigidity compound resin-epoxy powder coating composition of the invention is outstanding for the hardness performance of substrate, high
The adhesive force of hardness powdery paints and substrate reaches best, good for the adhesive property of substrate, hardness performance is good, coating it is weather-proof
Performance is not affected, and has good scratch-resistant effect, and avoiding leads to the performance of coating not because coating is scraped by external force
The generation of good problem；When being applied to appearance member, it can carry out, not change existing on the basis of existing outdoor powder-product spraying process
Field spraying process；Hardness test, knot are carried out to high rigidity compound resin-epoxy powder coating composition coating of the invention
Fruit shows to can achieve pencil hardness 4H (by GB/T 6,379 2006), and the hardness performance of coating is good.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, the embodiment that the present invention is enumerated can not give thoroughly all embodiments
To the greatest extent, all to belong to obvious changes or variations that technical solution of the present invention is extended out still in protection model of the invention
The column enclosed.All documents referred in the present invention are incorporated herein by reference, independent just as a document
It is cited as with reference to such.
Claims (12)
1. a kind of high rigidity compound resin-epoxy powder coating composition, it is characterised in that: the group including following parts by weight
Point:
2. high rigidity compound resin-epoxy powder coating composition according to claim 1, it is characterised in that: described
Polyester-epoxy resin acid value is 72~78mgKOH/g.
3. high rigidity compound resin-epoxy powder coating composition according to claim 1, it is characterised in that: described
The epoxide number equivalent of epoxy resin B is 195~220g/eq.
4. high rigidity compound resin-epoxy powder coating composition according to claim 1 or 3, it is characterised in that: institute
The epoxide number equivalent for stating epoxy resin A is 750~830g/eq.
5. high rigidity compound resin-epoxy powder coating composition according to claim 1, it is characterised in that: described
The Morse hardness of hardening filler is 5.0~6.0.
6. high rigidity compound resin-epoxy powder coating composition according to claim 5, it is characterised in that: described
Hardening filler is selected from least one of silica, aluminium oxide, wollastonite, silica flour and Ming Nai powder.
7. high rigidity compound resin-epoxy powder coating composition according to claim 1, it is characterised in that: described
The purity of polytetrafluoroethylwax wax is not less than 99%.
8. high rigidity compound resin-epoxy powder coating composition according to claim 1, it is characterised in that: described
Auxiliary agent contains the following parts by weight:
0.8~1.2 part of levelling agent；
0.5~1.0 part of brightener；
0.2~0.4 part of styrax.
9. a kind of system of high rigidity compound resin-epoxy powder coating composition according to claim 1-8
Preparation Method, which comprises the following steps:
Polyester-epoxy resin, epoxy resin A, epoxy resin B, polyethylene ethylene wax, auxiliary agent, pigment, hardening filler are mixed equal
After even, after successively carrying out melting extrusion, tabletting, cooling, coarse crushing, levigate crushing and screening, the compound tree of the high rigidity is obtained
Rouge-epoxy powder coating composition.
10. the preparation method of high rigidity compound resin-epoxy powder coating composition according to claim 9, special
Sign is that the temperature of the melting extrusion is 90~100 DEG C.
11. a kind of use of high rigidity compound resin-epoxy powder coating composition according to claim 1-8
On the way, which is characterized in that the high rigidity compound resin-epoxy powder coating composition is applied to appearance member.
12. the purposes of high rigidity compound resin-epoxy powder coating composition according to claim 11, feature exist
In, comprising the following steps:
After appearance member is surface-treated, the high rigidity compound resin-epoxy powder coating composition is sprayed, 180
It is toasted at~200 DEG C, is then cooled down, obtain coating.
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