CN109679452A - A kind of reinforcing bar powdery paints - Google Patents
A kind of reinforcing bar powdery paints Download PDFInfo
- Publication number
- CN109679452A CN109679452A CN201811605919.8A CN201811605919A CN109679452A CN 109679452 A CN109679452 A CN 109679452A CN 201811605919 A CN201811605919 A CN 201811605919A CN 109679452 A CN109679452 A CN 109679452A
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- CN
- China
- Prior art keywords
- epoxy resin
- type epoxy
- bisphenol
- reinforcing bar
- powdery paints
- 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.)
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
-
- 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
-
- 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
- C09D5/08—Anti-corrosive paints
-
- 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
- C08L2205/02—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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a kind of reinforcing bar powdery paints, raw material include bisphenol A type epoxy resin B, bisphenol A type epoxy resin C curing agent, pigment, Cab-O-sil, catalyst, levelling agent, defoaming agent.The invention also provides a kind of preparation methods of reinforcing bar powdery paints.The present invention has corrosion resistance, the fissility of resistance to cathode.
Description
Technical field
The present invention relates to paint fields, are related specifically to a kind of reinforcing bar powdery paints.
Background technique
The armored concrete of long-lived environmental protection plays the role of the total quality of foundation engineering key.It is not carried out in reinforcing bar
In the case where preservative treatment, seawater or underground water can cause to encroach on to reinforcing bar, and thus caused steel bar corrosion and expansion will lead to
Building internal stress increases, and eventually leads to building damage or service life greatly shortens.Due to work caused by steel bar corrosion
The damage of journey structure event of collapsing is also commonplace.Therefore, it is vital for carrying out preservative treatment to reinforcing bar.
Anticorrosion with painting powdery paints is a kind of effective steel bar anti-corrosion processing method on reinforcing bar.Generally using thermal spraying or
Barrier material of the electrostatic spraying powder coating as reinforcing bar.In the actual production process, it is believed that the thicker anti-corrosion of coating
Property it is better, cause reinforcing bar coating layer thickness be higher than international standard, this will lead to the performances such as the resistance to bend(ing) of reinforcing bar, adhesive force decline.
Meanwhile the anti-corrosive properties of reinforcing bar have a double requirements to the crosslink density and flexibility of coating, and the crosslink density of coating and flexibility
It is difficult to reach simultaneously, then toughness reduces crosslink density greatly, and the crosslink density of good toughness is then lower, so, domestic top grade reinforcing bar is anti-
Rotten powdery paints relies on always import in recent years.In order to change the status quo, meet demand prepares corrosion-resistant, the resistance to cathodic disbonding of one kind
Reinforcing bar powdery paints is technical problem urgently to be solved in the prior art.
Summary of the invention
One of the object of the invention is to invent a kind of reinforcing bar powdery paints, resistance to solve reinforcing bar powdery paints in the prior art
The technical problem of the burn into fissility of resistance to cathode difference.
The second object of the present invention is to provide a kind of preparation method of reinforcing bar powdery paints, corrosion-resistant, resistance to obtain having
The reinforcing bar powdery paints of cathodic disbonding performance.
To reach one of above-mentioned purpose, the invention adopts the following technical scheme:
A kind of reinforcing bar powdery paints, raw material include bisphenol A type epoxy resin 65-75%, curing agent 10-20%, pigment
2-5%, filler 5-10%, auxiliary agent 3-5%.
Preferably, filler is Cab-O-sil.
Preferably, auxiliary agent raw material includes levelling agent, defoaming agent, catalyst.
Preferably, curing agent is the hydroxy polymer type phenols curing agent of macromolecular.
Preferably, it joined the hydroxy compounds of small molecule in curing agent.
It is highly preferred that catalyst is methylimidazole.
Preferably, bisphenol A type epoxy resin includes bisphenol A type epoxy resin B and bisphenol A type epoxy resin C, bisphenol-A type
The epoxide equivalent of epoxy resin B is 1500-1800g/eq, and the epoxide equivalent of bisphenol A type epoxy resin C is 750-850g/eq.
It is highly preferred that the softening point of bisphenol A type epoxy resin B is 115-124 DEG C, the softening point of bisphenol A type epoxy resin C
It is 96-107 DEG C.
It is highly preferred that bisphenol A type epoxy resin B: bisphenol A type epoxy resin C=5:1-3:1.
It is highly preferred that bisphenol A type epoxy resin B: bisphenol A type epoxy resin C=4:1.
It is the two of arrival above-mentioned purpose, the invention adopts the following technical scheme:
A kind of preparation method of reinforcing bar powdery paints, comprising the following steps:
Raw material weighing: corresponding raw material is weighed；
It feeds intake: putting the raw materials into mixer；
Premixing: raw material is mixed twice, every time 15 minutes with meter Sai Ke mixer；
Blanking: with truck by mixed raw material blanking to next step；
Melting extrusion: in the environment of 100-120 degree melting mixing and with extruder squeeze out raw material；
Tabletting: the raw material of extrusion is pressed into the sheet with a thickness of 2-4 millimeters with tablet press machine；
It is broken: to be crushed sheet-shaped material with crusher；
It crushes: raising agent is added, is crushed raw material with pulverizer；
Sieve powder packaging: it is screened to obtain the powdery paints that partial size is 30-40 microns with 180 mesh screens, by coating packing at case
The utility model has the advantages that
The present invention select have high epoxide equivalent bisphenol A type epoxy resin B, bisphenol A type epoxy resin B strand compared with
Long, crosslink density is big, and powder coating layer is made to have good corrosion resistance, heat resistance, and tensile strength increases.
The present invention select have low epoxide equivalent bisphenol A type epoxy resin C, bisphenol A type epoxy resin C crosslink density compared with
Small, corrosion resistance, tensile strength are inadequate, but since the strand of bisphenol A type epoxy resin C is shorter, obtained powdery paints tool
There is good levelability, it is good with the adhesive force of ground, so that powdery paints has the good fissility of resistance to cathode.
Bisphenol A type epoxy resin B and bisphenol A type epoxy resin C are used in combination the present invention, obtain with corrosion resistance and
The powdery paints for the fissility of resistance to cathode.When bisphenol A type epoxy resin B or bisphenol A type epoxy resin C is used alone, by institute
The bisphenol A type epoxy resin used cannot meet crosslink density and flexibility simultaneously, and resulting product occurs a degree of
Cracking.Bisphenol A type epoxy resin B and bisphenol A type epoxy resin C hybrid reaction according to a certain percentage is made gained by the present invention
Product meets crosslink density and flexibility simultaneously, obtains indehiscent powdery paints, and there is good corrosion resistance and cathode to shell
From property.
Curing agent of the present invention selects the hydroxy polymer type phenols curing agent of macromolecular.This macromolecular curing agent and bis-phenol
A type epoxy resin has similar structure, has good compatibility with bisphenol A type epoxy resin, has cured coating film
Preferable flexibility.But the reactivity of this curing agent is lower, especially phase after the reaction, after reaction system viscosity increase,
Active reaction end group is difficult to participate in reaction because crimping package.In order to improve the reactivity of macromolecular curing agent, adapt to quick
The hydroxy compounds and catalyst of small molecule, Lai Tigao reaction speed is added in cured requirement.The curing agent that the present invention selects
Molecular structure in introduced part polyfunctionality component and flexible long structure, reactivity is high, can rapid curing, formation
Film has brilliant chemical resistance.
Specific embodiment
In order to make, the purpose of the present invention, technical solution are clearly and completely described and advantage is more clearly understood.It answers
Work as understanding, specific embodiment described herein is a part of the embodiment of the present invention, instead of all the embodiments, Jin Jinyong
To explain the embodiment of the present invention, it is not intended to limit the present invention embodiment, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
For concise and explanation purpose, the principle of embodiment is described by referring mainly to example.In the following description,
Many details are suggested to provide a thorough understanding of embodiments.It will however be evident that.For ordinary skill
Personnel, these embodiments can be not limited to these details in practice.In some instances, public affairs are not described in detail
Perception method and structure, to avoid unnecessarily making these embodiments become difficult to understand.In addition, all embodiments can be mutual
It is used in combination.
The invention discloses a kind of reinforcing bar powdery paints, raw material includes bisphenol A type epoxy resin 65-75%, curing agent
10-20%, pigment 2-5%, filler 5-10%, auxiliary agent 3-5%.Filler is Cab-O-sil；Auxiliary agent raw material includes levelling agent, defoaming
Agent, catalyst.Curing agent is the hydroxy polymer type phenols curing agent of macromolecular.It joined the hydroxyl of small molecule in curing agent
Compound.Catalyst is methylimidazole.Bisphenol A type epoxy resin includes bisphenol A type epoxy resin B and bisphenol type epoxy tree
Rouge C, the epoxide equivalent of bisphenol-A type ring oxygen resin B are 1500-1800g/eq (gram/equivalent), the ring of bisphenol A type epoxy resin C
Oxygen equivalent is 750-850g/eq.The softening point of bisphenol A type epoxy resin B is 115-124 DEG C, and bisphenol A type epoxy resin C's is soft
Changing point is 96-107 DEG C.Bisphenol A type epoxy resin B: bisphenol A type epoxy resin C=5:1-3:1.Raw material of the present invention derives from
Ai Tu nation.
The hydroxyl equivalent of curing agent of the present invention is 300-400, and such curing agent degree of polymerization is high, and molecular weight is big, good toughness, soft
It is higher to change point, conducive to the storage-stable of coating.If phenols curing agent strand is too short, flexibility is inadequate, is easily bent cracking；
If phenols curing agent strand chain is too long, coating is low with the adhesive force of ground, can be easily separated.The present invention selects molecular chain length
Moderate curing agent, combines curing agent and bisphenol A type epoxy resin sufficiently, is met flexibility and adhesive force simultaneously
Powdery paints.
The present invention is to improve the dispersion performance of catalyst, guarantees being mixed for catalyst and base-material, and bisphenol-A is selected in experiment
Type epoxy resin and catalyst are pre-mixed according to 9:1, and catalyst accounts for formula 2% or so.
A kind of preparation method of reinforcing bar powdery paints, comprising the following steps:
Raw material weighing: corresponding raw material is weighed；
It feeds intake: putting the raw materials into mixer；
Premixing: raw material is mixed twice, every time 15 minutes；
Blanking: by mixed raw material blanking to next step；
Melting extrusion: in the environment of 100-120 degree melting mixing and with extruder squeeze out raw material；
Tabletting: the raw material of extrusion is pressed into the sheet with a thickness of 2-4 millimeters；
It is broken: sheet-shaped material is crushed；
It crushes: raising agent is added, is crushed raw material with pulverizer；
Sieve powder packaging: it is screened to obtain the powdery paints that partial size is 30-40 microns with 180 mesh screens, by coating packing at case.
Table 1: influence of the bisphenol A type epoxy resin variety classes to coating performance
| Bisphenol A type epoxy resin type | A | B | C |
| Epoxide equivalent (g/eq) | 2200-3000 | 1500-1800 | 750-850 |
| Softening point (DEG C) | 130-142 | 115-124 | 96-107 |
| It is bent result | Serious cracking | Cracking | Cracking |
It is seen by table 1, when bisphenol A type epoxy resin A class or B class or C class is used alone, gained coating performance can not be simultaneously
Meet flexibility and crosslink density, when being especially single use bisphenol A type epoxy resin A, coating seriously cracks.
Table 2: the influence that bisphenol A type epoxy resin variety classes are arranged in pairs or groups to coating
Table 3: the influence that bisphenol A type epoxy resin variety classes are arranged in pairs or groups to coating
It is seen by table 2, table 3, with bisphenol A type epoxy resin B: the ratio of bisphenol A type epoxy resin C changes, gained coating
Also there is biggish difference in performance, and when the two ratio is within the scope of 5:1-3:1, coating shows preferable corrosion-resistant and shade tolerant
Pole fissility, when the two ratio is 4:1 or so, the performance of coating is splendid.
Table 4: influence of the curing agent of different hydroxyl equivalents to coating performance
| Project | Curing agent A | Curing agent B | Curing agent C | Curing agent D | Curing agent E |
| Hydroxyl equivalent | 178 | 240 | 320 | 410 | 710 |
| It is bent result | Cracking | Cracking | It does not crack | It does not crack | Cracking |
Table 5: influence of the curing agent of different hydroxyl equivalents to coating performance
| Project | Curing agent F | Curing agent G | Curing agent H | Curing agent I | Curing agent J |
| Hydroxyl equivalent | 300 | 330 | 370 | 400 | 450 |
| It is bent result | Slightly crack | It does not crack | It does not crack | Slightly crack | Slight cracking |
It is seen by table 4, table 5, the hydroxyl equivalent of curing agent has a significant impact the performance of coating, when curing agent hydroxyl equivalent position
When 300-400, coating has good performance.
Table 6: the raw material composition of embodiment 1-6
Table 7: the raw material composition of embodiment 7-12
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the range of specific embodiment, to the common skill of the art
For art personnel, as long as long as various change the attached claims limit and determine spirit and scope of the invention in, one
The innovation and creation using present inventive concept are cut in the column of protection.
Claims (11)
1. a kind of reinforcing bar powdery paints, which is characterized in that its raw material includes bisphenol A type epoxy resin 65-75%, curing agent 10-
20%, pigment 2-5%, filler 5-10%, auxiliary agent 3-5%.
2. a kind of reinforcing bar powdery paints according to claim 1, which is characterized in that the filler is Cab-O-sil.
3. a kind of reinforcing bar powdery paints according to claim 1, which is characterized in that the auxiliary agent raw material include levelling agent,
Defoaming agent, catalyst.
4. a kind of reinforcing bar powdery paints according to claim 1, which is characterized in that the curing agent is the hydroxyl of macromolecular
Polymer-type phenols curing agent.
5. a kind of reinforcing bar powdery paints according to claim 1, which is characterized in that joined small molecule in the curing agent
Hydroxy compounds.
6. a kind of reinforcing bar powdery paints according to claim 3, which is characterized in that the catalyst is methylimidazole.
7. a kind of reinforcing bar powdery paints according to claim 1, which is characterized in that the bisphenol A type epoxy resin includes
The epoxide equivalent of bisphenol A type epoxy resin B and bisphenol A type epoxy resin C, the bisphenol A type epoxy resin B are 1500-
The epoxide equivalent of 1800g/eq, the bisphenol A type epoxy resin C are 750-850g/eq.
8. a kind of reinforcing bar powdery paints according to claim 7, which is characterized in that the bisphenol A type epoxy resin B's is soft
Changing point is 115-124 DEG C, and the softening point of the bisphenol A type epoxy resin C is 96-107 DEG C.
9. a kind of reinforcing bar powdery paints according to claim 7, which is characterized in that the bisphenol A type epoxy resin B: double
Phenol A type epoxy resin C=5:1-3:1.
10. a kind of reinforcing bar powdery paints according to claim 9, which is characterized in that the bisphenol A type epoxy resin B: double
Phenol A type epoxy resin C=4:1.
11. a kind of preparation method of reinforcing bar powdery paints, comprising the following steps:
Raw material weighing: corresponding raw material is weighed；
It feeds intake: putting the raw materials into mixer；
Premixing: raw material is mixed twice, every time 15 minutes with meter Sai Ke mixer；
Blanking: with truck by mixed raw material blanking to next step；
Melting extrusion: in the environment of 100-120 degree melting mixing and with extruder squeeze out raw material；
Tabletting: the raw material of extrusion is pressed into the sheet with a thickness of 2-4 millimeters with tablet press machine；
It is broken: to be crushed sheet-shaped material with crusher；
It crushes: raising agent is added, is crushed raw material with pulverizer；
Sieve powder packaging: it is screened to obtain the powdery paints that partial size is 30-40 microns with 180 mesh screens, by coating packing at case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605919.8A CN109679452A (en) | 2018-12-26 | 2018-12-26 | A kind of reinforcing bar powdery paints |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605919.8A CN109679452A (en) | 2018-12-26 | 2018-12-26 | A kind of reinforcing bar powdery paints |
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| CN109679452A true CN109679452A (en) | 2019-04-26 |
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| CN201811605919.8A Pending CN109679452A (en) | 2018-12-26 | 2018-12-26 | A kind of reinforcing bar powdery paints |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111117436A (en) * | 2020-01-07 | 2020-05-08 | 江南载福粉末涂料（张家港）有限公司 | Zinc-rich base powder super-anticorrosion paint |
| CN111117437A (en) * | 2020-01-10 | 2020-05-08 | 安徽真信涂料有限公司 | Anti-corrosion powder coating for drinking water pipeline and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101965A (en) * | 2011-01-06 | 2011-06-22 | 河北欧特涂料有限公司 | Steel bar anticorrosion powder coating and preparation method thereof |
| 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 |
| CN103509431A (en) * | 2013-08-26 | 2014-01-15 | 广州擎天材料科技有限公司 | Pure epoxy heavy anticorrosive powder paint used for coating building steel bars and preparation method thereof |
| CN105925145A (en) * | 2016-07-07 | 2016-09-07 | 天津瑞远粉末涂料有限公司 | High-performance anti-corrosion epoxy powder coating |
| CN106590342A (en) * | 2016-12-14 | 2017-04-26 | 广东雅佳新型节能高分子材料有限公司 | Anti-corrosion powdery coating for reinforced cables |
-
2018
- 2018-12-26 CN CN201811605919.8A patent/CN109679452A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101965A (en) * | 2011-01-06 | 2011-06-22 | 河北欧特涂料有限公司 | Steel bar anticorrosion powder coating and preparation method thereof |
| 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 |
| CN103509431A (en) * | 2013-08-26 | 2014-01-15 | 广州擎天材料科技有限公司 | Pure epoxy heavy anticorrosive powder paint used for coating building steel bars and preparation method thereof |
| CN105925145A (en) * | 2016-07-07 | 2016-09-07 | 天津瑞远粉末涂料有限公司 | High-performance anti-corrosion epoxy powder coating |
| CN106590342A (en) * | 2016-12-14 | 2017-04-26 | 广东雅佳新型节能高分子材料有限公司 | Anti-corrosion powdery coating for reinforced cables |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111117436A (en) * | 2020-01-07 | 2020-05-08 | 江南载福粉末涂料（张家港）有限公司 | Zinc-rich base powder super-anticorrosion paint |
| CN111117437A (en) * | 2020-01-10 | 2020-05-08 | 安徽真信涂料有限公司 | Anti-corrosion powder coating for drinking water pipeline and preparation method thereof |
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Application publication date: 20190426 |