CN109280466A - A kind of low temperature thermal boundary powdery paints and preparation method thereof - Google Patents
A kind of low temperature thermal boundary powdery paints and preparation method thereof Download PDFInfo
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- CN109280466A CN109280466A CN201811082422.2A CN201811082422A CN109280466A CN 109280466 A CN109280466 A CN 109280466A CN 201811082422 A CN201811082422 A CN 201811082422A CN 109280466 A CN109280466 A CN 109280466A
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- Prior art keywords
- powdery paints
- low temperature
- thermal boundary
- temperature thermal
- agent
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Classifications
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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
- C09D163/04—Epoxynovolacs
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention relates to a kind of low temperature thermal boundary powdery paints and preparation method thereof, which includes novolac epoxy resin, modified phenolic class curing agent, imidazole curing agent, auxiliary agent, pigments and fillers.Powdery paints of the present invention overturns tradition, and solidification temperature is low, curing time is short；Paint film after solidification has excellent blooming behavior and mechanical performance；Powdery paints of the present invention breaks through prior art powdery paints and is only applicable to metal class high temperature resistant ground, and the coating of powdery paints has been extended to wider field of coating, such as MDF, glass plate.
Description
Technical field
The present invention relates to a kind of coating composition, in particular to a kind of powdery paints and preparation method thereof.
Background technique
Powdery paints is the solid powdery synthetic resin coating formed with hard resin and pigment, filler and auxiliary agent etc..
It is different with usual vehicle type coating and water paint, its decentralized medium not instead of solvent and water, air.It has solvent-free
The characteristics of pollution, 100% film forming, low energy consumption.
It has two major classes: thermoplastic powder coating and thermosetting powder coating.
Thermoplastic powder coating is by thermoplastic resin, pigment, filler, plasticizer and stabilizer etc. at being grouped as.Heat
Plastic powder coating includes: polyethylene, polypropylene, polyester, polyvinyl chloride, chlorinated polyether, polyamide-based, cellulose-based, polyester
System.
Thermosetting powder coating is made of thermosetting resin, curing agent, pigment, filler and auxiliary agent etc..Powder thermosetting
Coating includes: epoxy resin, Polyester, acrylic resin.
Resin used in conventional thermosetting powder coating all has polar group, so only to metal such as aluminium sheet, zinc-plated
The adhesive force of the substrates such as plate, aluminum casting is good, to metal outside substrate poor adhesive force, simultaneously because usually thermosetting powder coating
Solidification temperature at 180 DEG C or so, differed according to the thickness of workpiece at 3~5 minutes to 10~40 minutes by curing time.Solidification temperature
Height can not be applied to a series of spraying of thermo-sensitive materials such as MDF, cement plate, glass.Curing time is long, in addition actual production line
The production efficiency of the times such as raising, reduction, the spraying of middle furnace temperature, existing powdery paints are low.
Summary of the invention
The purpose of the present invention is: the temperature-sensitives such as MDF, cement plate, glass can not be applied to by solving powdery paints in the prior art
The spraying of material provides the low temperature thermal boundary powdery paints that a kind of solidification temperature is low, curing time is short.
Realizing the technical solution of the object of the invention is: a kind of low temperature thermal boundary powdery paints is grouped as by following group:
The auxiliary agent include: levelling agent, styrax, silica thixotropic agent, defoaming agent, optical brightener, cured powder, in sand streak agent
It is a variety of；
The pigments and fillers include: phthalocyanine blue, iron oxide red, iron oxide yellow, carbon black, mica powder, blanc fixe, rutile
It is a variety of in titanium dioxide, wollastonite；
The imidazole curing agent is 2-methylimidazole quinoline.
The present invention one preferred formula is:
Solidify in this formula most easy to operate, paint film chalking resistance, mechanical performance are best.
The preparation method of powdery paints of the present invention includes: that each component is pre-mixed by (1)；(2) it is uniformly mixed in broken cylinder；
(3) double screw extruder melting extrusion；(4) air-cooler is cooling；(5) fine grinding；(6) it is packaged.Wherein twin-screw extrusion in step (2)
The melting temperature of machine is arranged at 80~90 DEG C, and melting is considered for following at this temperature: powder of the present invention itself is low temperature
Solidification, such as more than 90 DEG C or more, it is easy to which resin reacts in advance with curing agent in melting, is also easy to produce solidification or coking grain
Son is lower than 80 DEG C, the softening point of epoxy, equipment easy to wear is not achieved, and causes powder dispersion uneven.
The low temperature thermal boundary powdery paints of the present invention novolac epoxy resin bigger using polar group reactivity, in addition
Modified phenolic class curing agent is used cooperatively with imidazole curing agent, and three matches, and reaches best flat by being formulated to adjust
Weigh point, enables inventive formulation such as 120 DEG C, 130 DEG C at relatively low reaction temperature, rapid curing is complete.Spraying
Curing reaction occurs afterwards, has just started phenolic curing agent and has reacted solidification with matrix resin, has reacted matrix phenolic aldehyde ring after a period of time
Oxygen resin has remained unreacted, and imidazole curing agent is further with matrix resin curing reaction to complete at this time.It is raw in reaction
At small molecule object formula in styrax, defoaming agent etc. exclude.
Imidazole curing agent of the present invention has catalyst and curing agent double effects.Catalyst is catalyzed rapid reaction,
And pass through the adjusting catalytic of additional amount；Curing agent promotes fully reacting for the epoxy in consumption system.
Powdery paints of the present invention can be applied to the substrates such as MDF medium density fibre board (MDF), cement plate, glass and be determined by two aspects
It is fixed, it is that can adsorb first, can followed by solidifies.Higher active novolac epoxy resin is selected to make powdery paints of the present invention
It can be adsorbed on substrate through spraying；It is used using the collocation of two kinds of curing agent and novolac epoxy resin and two kinds of curing agent,
So that powder coating solidification speed of the present invention is fast, do not need aforementioned plate high-temperature baking, it can rapid curing.Wherein through inventing
People's research and probe repeatedly, works as novolac epoxy resin: phenolic curing agent: imidazole curing agent mass parts ratio is 5:0.8:0.5
When system formulation be an optimum value, curing reaction temperature and reaction speed are most suitable at this time, and the comprehensive performance of paint film is best.
0.8 part of phenolic curing agent needs 4 parts of epoxy resin, and 2-methylimidazole quinoline a part can be reacted with epoxy resin, another portion
Divide as the catalyst to solidification promotes entire reaction process, it is more reasonable to make entirely to be formulated.
Powdery paints paint film of the present invention shows excellent flow leveling.Universal low-temperature powder coating is according to national standard
JBT3998-1999, levelling class 5 grade or so, and levelling grade of the present invention can achieve 7 grades, 8 grades.This is because common flour
Last coating will guarantee the mechanical performance of paint film, it is common practice to slow melted powder at high temperature, slowly pave substrate then
Sacrifice levelability.And powdery paints reaction speed of the present invention is fast, quickly then can ensure that flow leveling by levelling.
In addition, powdery paints chalking resistance of the present invention can be good.Powder coating solidification process small molecular object does not drain, at
Surface of the paint film after type occurs as soon as white haze, i.e. frosting phenomenon.Epoxy resin itself contains a little magazine (small molecule object), and defoams
Agent, styrax, cured powder fusing point normally all between 90~120 DEG C, this needs both to consider the solidification temperature of itself, simultaneous again
The fusing point for caring for auxiliary agent is verified repeatedly through inventor and works as novolac epoxy resin with research: phenolic curing agent: imidazole curing agent matter
It is best to measure also to bloom effect when portion rate is 5:0.8:0.5.
Present invention twin-screw from the catalytic curing effect for choosing two kinds of curing agent of novolac epoxy resin, and production
The control of the techniques such as temperature design can be good at controlling reaction speed by small molecule exclusion completely, being eventually exhibited as paint film
Also to bloom is had excellent performance.
The present invention has the effect of positive:
1. powdery paints of the present invention overturns traditional gel time, solidification temperature is low, curing time is short, and solidification only needs 120
DEG C * 20s, 130 DEG C of * 10s or so；
2. the paint film after solidifying has excellent blooming behavior and mechanical performance, mechanical performance 50KG, which just recoils, to be passed through, curved
Bent 3mm, levelling grade reach 8 grades；
3. it is suitable for a series of spraying of thermo-sensitive materials such as sensitive MDF (medium density fibre board (MDF)), cement plate, glass, it is attached
Put forth effort to reach 0 grade.
Specific embodiment
One, each component of corrresponding quality is weighed according to the formula of following each embodiments: each component in each Example formulations
Measurement unit is kg.
The powdery paints each component of above-described embodiment 1~9 is prepared as steps described below: (1) being premixed each component
It closes；(2) it is uniformly mixed in broken cylinder；(3) double screw extruder melting extrusion；(4) air-cooler is cooling；(5) SCM flour mill is thin
Mill；(6) it is packaged.Wherein the melting temperature of double screw extruder is arranged at 80~90 DEG C in step (2).Obtained number is P-1, P-
2,,, the powdery paints of P-9.
Then the powder paint of above-mentioned P-1~P-9 tests paint film after solidification on different substrate materials.
Test method explanation:
Impact resistance: using diameter for the formed punch of 16mm ± 0.3mm, carries out impact examination referring to 1732 prescriptive procedure of GB/T
It tests.
Bending resistance: by method as defined in GB/T 6742, the standard test plate (panel) of use carries out test radius of curvature as 3mm.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (6)
1. a kind of low temperature thermal boundary powdery paints, it is characterised in that the composition of the powdery paints is calculated as with mass fraction:
The imidazole curing agent is 2-methylimidazole quinoline.
2. low temperature thermal boundary powdery paints according to claim 1, it is characterised in that: the novolac epoxy resin, phenolic
Curing agent, imidazole curing agent mass parts ratio are 5:0.8:0.5.
3. low temperature thermal boundary powdery paints according to claim 1, it is characterised in that: the modified phenolic class curing agent is big
It is produced to celebrate Qing Lulangrun Science and Technology Ltd., model: V92X.
4. low temperature thermal boundary powdery paints according to claim 2, it is characterised in that: the auxiliary agent includes: levelling agent, rests in peace
It is perfume, silica thixotropic agent, defoaming agent, optical brightener, cured powder, a variety of in sand streak agent；The pigments and fillers include: phthalocyanine blue, oxidation
It is iron oxide red, iron oxide yellow, carbon black, mica powder, blanc fixe, rutile titanium white powder, a variety of in wollastonite.
5. low temperature thermal boundary powdery paints according to claim 4, it is characterised in that the composition of the powdery paints is with quality
Number is calculated as:
6. a kind of preparation method of the low temperature thermal boundary powdery paints as described in Claims 1 to 5 includes: that (1) premixes each component
It closes；(2) it is uniformly mixed in broken cylinder；(3) double screw extruder melting extrusion；(4) air-cooler is cooling；(5) fine grinding；(6) it beats
Packet, wherein the melting temperature of double screw extruder is arranged at 80~90 DEG C in step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811082422.2A CN109280466A (en) | 2018-09-17 | 2018-09-17 | A kind of low temperature thermal boundary powdery paints and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811082422.2A CN109280466A (en) | 2018-09-17 | 2018-09-17 | A kind of low temperature thermal boundary powdery paints and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109280466A true CN109280466A (en) | 2019-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811082422.2A Pending CN109280466A (en) | 2018-09-17 | 2018-09-17 | A kind of low temperature thermal boundary powdery paints and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552787A (en) * | 2020-12-08 | 2021-03-26 | 常熟方塔塑粉有限公司 | Preparation method of low-temperature cured composite resin powder coating |
| CN112662283A (en) * | 2020-12-19 | 2021-04-16 | 江南载福粉末涂料（张家港）有限公司 | High-temperature-resistant vertical grain powder coating for oven |
Citations (4)
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|---|---|---|---|---|
| CN103045051A (en) * | 2013-01-18 | 2013-04-17 | 天津市凯华绝缘材料有限公司 | Low-temperature-toughness steel bar anticorrosive powder paint and preparation method thereof |
| CA2989774A1 (en) * | 2015-06-17 | 2016-12-22 | H.E.F | Powder paint thermosetting binder composition and manufacturing method |
| CN106566376A (en) * | 2016-10-19 | 2017-04-19 | 武汉科技大学 | Low-light-leveling and low-temperature-curing epoxy powder coating used for coating medium-density fiberboard |
| CN107868568A (en) * | 2017-11-14 | 2018-04-03 | 广州擎天材料科技有限公司 | A kind of bicycle special low temperature cured powder paint and preparation method thereof |
-
2018
- 2018-09-17 CN CN201811082422.2A patent/CN109280466A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045051A (en) * | 2013-01-18 | 2013-04-17 | 天津市凯华绝缘材料有限公司 | Low-temperature-toughness steel bar anticorrosive powder paint and preparation method thereof |
| CA2989774A1 (en) * | 2015-06-17 | 2016-12-22 | H.E.F | Powder paint thermosetting binder composition and manufacturing method |
| CN106566376A (en) * | 2016-10-19 | 2017-04-19 | 武汉科技大学 | Low-light-leveling and low-temperature-curing epoxy powder coating used for coating medium-density fiberboard |
| CN107868568A (en) * | 2017-11-14 | 2018-04-03 | 广州擎天材料科技有限公司 | A kind of bicycle special low temperature cured powder paint and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552787A (en) * | 2020-12-08 | 2021-03-26 | 常熟方塔塑粉有限公司 | Preparation method of low-temperature cured composite resin powder coating |
| CN112662283A (en) * | 2020-12-19 | 2021-04-16 | 江南载福粉末涂料（张家港）有限公司 | High-temperature-resistant vertical grain powder coating for oven |
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Application publication date: 20190129 |