CN111777924A - Epoxy zinc-rich coating for expressway guardrail and preparation method thereof - Google Patents
Epoxy zinc-rich coating for expressway guardrail and preparation method thereof Download PDFInfo
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- CN111777924A CN111777924A CN202010755069.0A CN202010755069A CN111777924A CN 111777924 A CN111777924 A CN 111777924A CN 202010755069 A CN202010755069 A CN 202010755069A CN 111777924 A CN111777924 A CN 111777924A
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- epoxy zinc
- zinc
- epoxy
- rich
- guardrail
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an epoxy zinc-rich coating for a highway guardrail and a preparation method thereof, wherein the epoxy zinc-rich coating for the highway guardrail is mainly prepared from the following raw materials in parts by weight: 25-30 parts of phenolic epoxy resin, 25-30 parts of bisphenol A epoxy resin, 5-10 parts of phenolic curing agent, 1-5 parts of amine curing agent, 15-20 parts of zinc powder, 15-20 parts of filler and 1-3 parts of auxiliary agent. The epoxy zinc-rich powder coating provided by the application does not contain a solvent, the VOC emission is close to zero in the production and coating processes, and no chemical damage is caused to the environment and constructors; the curing time of the epoxy zinc-rich powder coating is 10-30 minutes, so that the time cost is greatly reduced, and the efficiency is improved.
Description
Technical Field
The invention relates to the technical field of chemical coatings, in particular to an epoxy zinc-rich coating for a highway guardrail and a preparation method thereof.
Background
The environment of the highway guardrail is relatively complex. The service life of the highway guardrail can be reduced by the high temperature and the low temperature (the high temperature is 60 ℃ and the low temperature is-20 ℃) in different areas, the corrosion of rainwater with different acid values, the influence of automobile tail gas, the impact of hard objects and the like.
The anticorrosive coating of the highway guardrail needs to meet the technical anticorrosive conditions of GB/T18226-2015 highway traffic engineering steel components. Epoxy zinc-rich paint is mainly adopted for preventing corrosion of the bottom layer of the highway guardrail. However, the epoxy zinc-rich primer has the following defects: the VOC discharge amount is large, the influence on the environment is large, and the harm to constructors is high.
Disclosure of Invention
The invention aims to solve the problems and aims to provide an epoxy zinc-rich coating for a highway guardrail and a preparation method thereof.
In a first aspect, the invention provides an epoxy zinc-rich coating for a highway guardrail, which is mainly prepared from the following raw materials in parts by weight:
according to the technical scheme provided by some embodiments of the application, the epoxy zinc-rich coating for the expressway guardrail is mainly prepared from the following raw materials in parts by weight:
according to certain embodiments of the present disclosure, the bisphenol a epoxy resin is prepared by a two-step process.
According to the technical scheme provided by some embodiments of the present application, the filler is one or more of wollastonite powder, mica powder and barium sulfate.
According to the technical scheme provided by some embodiments of the present application, the auxiliary agent is one or more of graphene, a leveling agent, an accelerator, and a degassing agent.
In a second aspect, the invention provides a preparation method of an epoxy zinc-rich coating for a highway guardrail, which comprises the following steps:
premixing phenolic epoxy resin, bisphenol A epoxy resin, a phenolic curing agent, an amine curing agent, zinc powder, a filler and an auxiliary agent;
melting, mixing and extruding the mixture by a double-screw extruder to obtain a material sheet;
and pulverizing the tablets by a pulverizer to obtain the epoxy zinc-rich coating product for the expressway guardrail.
According to the technical scheme provided by some embodiments of the application, the rotation speed of the twin-screw extruder is controlled at 1300-1400r/min, wherein the temperature of the first zone is 100 ℃, the temperature of the second zone is 105 ℃, and the distance between the two rollers is 0.5-0.7 mm.
According to the technical scheme provided by certain embodiments of the application, the rotating speed of the crusher is controlled at 23000-.
Compared with the prior art, the beneficial effect of this application: the epoxy zinc-rich powder coating provided by the application does not contain a solvent, the VOC emission is close to zero in the production and coating processes, and no chemical damage is caused to the environment and constructors; the curing time of the epoxy zinc-rich powder coating is 10-30 minutes, so that the time cost is greatly reduced, and the efficiency is improved.
Detailed Description
The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1
The embodiment is an epoxy zinc-rich coating for a highway guardrail, which is prepared from the following raw materials:
the adopted zinc powder is flaky zinc powder, and the adopted fillers are wollastonite powder and mica powder; the adopted auxiliary agent is graphene.
The preparation method of the epoxy zinc-rich coating for the expressway guardrail comprises the following steps:
premixing phenolic epoxy resin, bisphenol A epoxy resin, a phenolic curing agent, an amine curing agent, zinc powder, a filler and an auxiliary agent;
melting, mixing and extruding the mixture by a double-screw extruder to obtain a material sheet;
and pulverizing the tablets by a pulverizer to obtain the epoxy zinc-rich coating product for the expressway guardrail.
Preferably, the rotating speed of the double-screw extruder is controlled at 1300r/min, wherein the temperature of the first zone is 100 ℃, the temperature of the second zone is 105 ℃, and the distance between two rollers is 0.5 mm.
Preferably, the rotation speed of the pulverizer is controlled at 23000r/min, the pulverizing time is 8s, and the amount of the tablets put into the pulverizer is 1/3 of the capacity of the pulverizer.
Example 2
The embodiment is an epoxy zinc-rich coating for a highway guardrail, which is prepared from the following raw materials:
the adopted zinc powder is flaky zinc powder, and the adopted fillers are wollastonite powder, mica powder and barium sulfate; the adopted auxiliary agents comprise 2 parts of graphene, a flatting agent, an accelerant and a degassing agent, wherein the amount of the flatting agent, the accelerant and the degassing agent is 1 part.
The preparation method of the epoxy zinc-rich coating for the expressway guardrail comprises the following steps:
premixing phenolic epoxy resin, bisphenol A epoxy resin, a phenolic curing agent, an amine curing agent, zinc powder, a filler and an auxiliary agent;
melting, mixing and extruding the mixture by a double-screw extruder to obtain a material sheet;
and pulverizing the tablets by a pulverizer to obtain the epoxy zinc-rich coating product for the expressway guardrail.
Preferably, the rotating speed of the double-screw extruder is controlled at 1400r/min, wherein the temperature of the first zone is 100 ℃, the temperature of the second zone is 105 ℃, and the distance between two rollers is 0.7 mm.
Preferably, the rotating speed of the pulverizer is controlled at 26000r/min, the pulverizing time is 10s, and the amount of the tablets put into the pulverizer is 2/3 of the capacity of the pulverizer.
Example 3
The embodiment is an epoxy zinc-rich coating for a highway guardrail, which is prepared from the following raw materials:
the adopted zinc powder is flaky zinc powder, and the adopted fillers are wollastonite powder, mica powder and barium sulfate; the adopted auxiliary agents comprise 2 parts of graphene, a flatting agent, an accelerant and a degassing agent, wherein the amount of the flatting agent, the accelerant and the degassing agent is 1 part.
The preparation method of the epoxy zinc-rich coating for the expressway guardrail comprises the following steps:
premixing phenolic epoxy resin, bisphenol A epoxy resin, a phenolic curing agent, an amine curing agent, zinc powder, a filler and an auxiliary agent;
melting, mixing and extruding the mixture by a double-screw extruder to obtain a material sheet;
and pulverizing the tablets by a pulverizer to obtain the epoxy zinc-rich coating product for the expressway guardrail.
Preferably, the rotating speed of the double-screw extruder is controlled to 1350r/min, wherein the temperature of the first zone is 100 ℃, the temperature of the second zone is 105 ℃, and the distance between two rollers is 0.6 mm.
Preferably, the rotating speed of the pulverizer is controlled at 25000r/min, the pulverizing time is 9s, and the amount of the tablets put into the pulverizer is 2/3 of the capacity of the pulverizer.
Performance testing
The epoxy zinc-rich paint for highway guardrails of each example was subjected to performance tests according to GB/T18226-2015 standard, wherein the test items comprise adhesion performance, cathodic disbondment resistance, bending resistance, salt spray resistance and wet heat resistance, and the test results are shown in Table 1.
TABLE 1 Performance test
As can be seen from Table 1, the epoxy zinc-rich coating for the highway guardrail prepared by the embodiments of the application has better performance and meets the technical corrosion prevention condition of steel members in GB/T18226-.
The epoxy zinc-rich powder coating does not contain a solvent, VOC emission is close to zero in the production and coating processes, and chemical damage to the environment and constructors can be avoided. In addition, the curing time of the epoxy zinc-rich paint is 7 days, but the curing time of the epoxy zinc-rich powder coating is 10-30 minutes according to different processes, so that the time cost is greatly reduced, and the efficiency is improved.
In the formula of the epoxy zinc-rich powder coating, the novolac epoxy resin is adopted, and the resin has high compactness and good chemical corrosion resistance; bisphenol A type epoxy resin is adopted, so that the resin has outstanding toughness and reacts with a phenolic curing agent to form a more compact coating, and the permeation of water molecules is effectively blocked; the interaction between partial epoxy groups, ether bonds and hydroxyl groups of the bisphenol A epoxy resin and the novolac epoxy resin and hydroxyl groups which do not participate in the reaction of the phenolic curing agent and the base material improves the adhesive force with the base material; in addition, zinc powder is added to provide cathode protection for the guardrail, so that the corrosion resistance of the coating is improved, and the coating has self-repairability; by adding the amine curing agent, the hydrogen bond and van der Waals force between the powder and the base material are increased, and the adhesive force between the powder and the base material is improved; the coating is sealed by adopting the sealed mica and the wollastonite powder as the filler, so that the water absorption resistance of the coating is increased; by adopting precipitated barium sulfate, the cost is reduced, and the extrusion environment is improved.
Wherein the formula of the reaction of the epoxy resin and the phenolic curing agent is as follows:
the equation for the reaction of epoxy resins with amine curing agents is:
although the embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The epoxy zinc-rich coating for the expressway guardrail is characterized by mainly being prepared from the following raw materials in parts by weight:
2. the epoxy zinc-rich paint for the expressway guardrail as claimed in claim 1, which is mainly prepared from the following raw materials in parts by weight:
3. the epoxy zinc-rich paint for the expressway guardrail of claim 1, wherein the bisphenol A epoxy resin is prepared by a two-step method.
4. The epoxy zinc-rich paint for the expressway guardrail as claimed in claim 1, wherein the filler is one or more of wollastonite powder, mica powder and barium sulfate.
5. The epoxy zinc-rich paint for the highway guardrail as recited in claim 1, wherein the auxiliary agent is one or more of graphene, a leveling agent, an accelerator and a degassing agent.
6. A method for preparing the epoxy zinc-rich paint for the expressway guardrail as claimed in any one of claims 1 to 5, comprising the following steps:
premixing phenolic epoxy resin, bisphenol A epoxy resin, a phenolic curing agent, an amine curing agent, zinc powder, a filler and an auxiliary agent;
melting, mixing and extruding the mixture by a double-screw extruder to obtain a material sheet;
and pulverizing the tablets by a pulverizer to obtain the epoxy zinc-rich coating product for the expressway guardrail.
7. The method for preparing the epoxy zinc-rich paint for the highway guardrail as claimed in claim 6, wherein the rotating speed of the twin-screw extruder is controlled at 1300-1400r/min, wherein the temperature of the first zone is 100 ℃, the temperature of the second zone is 105 ℃, and the distance between the two rollers is 0.5-0.7 mm.
8. The method for preparing the epoxy zinc-rich paint for the highway guardrail as claimed in claim 6, wherein the rotating speed of the crusher is controlled at 23000-26000r/min, the crushing time is 8-10s, and the amount of the tablets put into the crusher is 1/3-2/3 of the capacity of the crusher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010755069.0A CN111777924A (en) | 2020-07-31 | 2020-07-31 | Epoxy zinc-rich coating for expressway guardrail and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010755069.0A CN111777924A (en) | 2020-07-31 | 2020-07-31 | Epoxy zinc-rich coating for expressway guardrail and preparation method thereof |
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| CN111777924A true CN111777924A (en) | 2020-10-16 |
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| CN202010755069.0A Pending CN111777924A (en) | 2020-07-31 | 2020-07-31 | Epoxy zinc-rich coating for expressway guardrail and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112625539A (en) * | 2020-12-01 | 2021-04-09 | 河北汉光重工有限责任公司 | Epoxy zinc-based anticorrosive powder coating for roads and preparation thereof |
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| CN103666203A (en) * | 2013-11-08 | 2014-03-26 | 洛阳双瑞防腐工程技术有限公司 | Low-temperature fast-curing epoxide powder paint and preparation method thereof |
| CN108003689A (en) * | 2017-12-01 | 2018-05-08 | 成都信达高分子材料有限公司 | A kind of epoxy resin zinc-rich double antiseptic powder coating |
| CN108368357A (en) * | 2015-12-17 | 2018-08-03 | Ppg工业俄亥俄公司 | Impact resistance coating composition |
| 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 |
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2020
- 2020-07-31 CN CN202010755069.0A patent/CN111777924A/en active Pending
Patent Citations (5)
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| CN103382353A (en) * | 2013-07-08 | 2013-11-06 | 吴江市物华五金制品有限公司 | Heavy-duty anticorrosion environmental-friendly enhanced powder coating |
| CN103666203A (en) * | 2013-11-08 | 2014-03-26 | 洛阳双瑞防腐工程技术有限公司 | Low-temperature fast-curing epoxide powder paint and preparation method thereof |
| CN108368357A (en) * | 2015-12-17 | 2018-08-03 | Ppg工业俄亥俄公司 | Impact resistance coating composition |
| CN108003689A (en) * | 2017-12-01 | 2018-05-08 | 成都信达高分子材料有限公司 | A kind of epoxy resin zinc-rich double antiseptic powder coating |
| 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112625539A (en) * | 2020-12-01 | 2021-04-09 | 河北汉光重工有限责任公司 | Epoxy zinc-based anticorrosive powder coating for roads and preparation thereof |
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Application publication date: 20201016 |