CN113174170B - Zinc-free primer and preparation method thereof - Google Patents
Zinc-free primer and preparation method thereof Download PDFInfo
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- CN113174170B CN113174170B CN202110385506.9A CN202110385506A CN113174170B CN 113174170 B CN113174170 B CN 113174170B CN 202110385506 A CN202110385506 A CN 202110385506A CN 113174170 B CN113174170 B CN 113174170B
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- 238000002360 preparation method Methods 0.000 title abstract description 13
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims abstract description 85
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 28
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000005011 phenolic resin Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000003822 epoxy resin Substances 0.000 claims abstract description 14
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 12
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000000049 pigment Substances 0.000 claims abstract description 8
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 22
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 20
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052725 zinc Inorganic materials 0.000 claims description 13
- 239000011701 zinc Substances 0.000 claims description 13
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000006229 carbon black Substances 0.000 claims description 7
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 33
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 33
- 150000003839 salts Chemical class 0.000 abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 230000000052 comparative effect Effects 0.000 description 11
- 239000003973 paint Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 230000003993 interaction Effects 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- 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
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
-
- 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
-
- 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
Landscapes
- 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)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The application relates to the field of primers, and particularly discloses a zinc-free primer and a preparation method thereof. The zinc-free primer comprises the following components in percentage by weight (5-6.5): 1, wherein the component A comprises 10-15 parts of polyvinyl butyral, 3-5 parts of alcohol-soluble phenolic resin, 5-8 parts of epoxy resin, 2-5 parts of n-butyl alcohol etherified melamine formaldehyde resin, 8-12 parts of anti-rust pigment, 10-15 parts of anti-rust coating, 6-10 parts of filler, 3-5 parts of auxiliary agent, 8-12 parts of dimethylbenzene and 25-35 parts of saturated monohydric alcohol by weight; the component B comprises 20-30 parts of phosphoric acid and 70-80 parts of alcohol by weight; the preparation method comprises the following steps: and mixing the raw materials of the component A to prepare a component A, mixing the raw materials of the component B to prepare a component B, and uniformly mixing the component A and the component B to obtain the zinc-free primer. The zinc-free primer of the present application is suitable for use on aluminum panels and has superior salt water resistance.
Description
Technical Field
The application relates to the field of primers, in particular to a zinc-free primer and a preparation method thereof.
Background
Primers are commonly used for steel corrosion protection and shop maintenance primers, and generally comprise two types, namely zinc-rich primers and zinc-free primers. The zinc-rich primer is the most commonly used primer, is suitable for workshop primers and can be used for corrosion prevention of steel. The zinc-rich primer has good adhesive force, strong antirust capability, excellent moisture resistance, salt fog resistance, mildew resistance and oxidation resistance, and is one of the most important primers for the corrosion prevention of metals such as steel.
When the zinc-rich primer is used as an anti-corrosion primer, a paint film is generally thin and is easily influenced by an external environment medium. The content of zinc powder is generally higher, between 85 and 95 weight percent, secondary flash rust is easy to generate, the price of the zinc-rich primer is higher, and the use cost is higher. Since the zinc activity of the zinc-rich primer is similar to that of aluminum, the salt water resistance of the zinc-rich primer is poor when the zinc-rich primer is used on an aluminum plate, and therefore the zinc-rich primer is not suitable for being used on the aluminum plate.
With respect to the above-described related art, the inventors consider that: it is desirable to provide a zinc free primer suitable for use on aluminum panels.
Disclosure of Invention
In order to solve the problem that the zinc-rich primer is not suitable for an aluminum plate, the application provides a zinc-free primer and a preparation method thereof.
In a first aspect, the present application provides a zinc-free primer, which adopts the following technical scheme:
a zinc-free primer comprises the following raw materials in percentage by weight (5-6.5): 1, wherein the component A comprises, by weight, 10-15 parts of polyvinyl butyral, 3-5 parts of alcohol-soluble phenolic resin, 5-8 parts of epoxy resin, 2-5 parts of n-butyl alcohol etherified melamine formaldehyde resin, 8-12 parts of anti-rust pigment, 10-15 parts of anti-rust coating, 6-10 parts of filler, 3-5 parts of auxiliary agent, 8-12 parts of xylene and 25-35 parts of saturated monohydric alcohol; the component B comprises 20-30 parts of phosphoric acid and 70-80 parts of alcohol by weight.
By adopting the technical scheme, the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin are added into the zinc-free primer, wherein the alcohol-soluble phenolic resin has better chemical resistance, the cross-linking degree of the n-butyl alcohol etherified melamine formaldehyde resin is larger, the n-butyl alcohol etherified melamine formaldehyde resin can be cross-linked with the alcohol-soluble phenolic resin to form a three-dimensional network structure, the compatibility of all raw materials in the zinc-free primer is improved, and the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin have synergistic effect, so that the zinc-free primer has better salt water resistance when being coated on an aluminum plate.
Preferably, the epoxy equivalent of the epoxy resin is 220-320 g/eq.
By adopting the technical scheme, the interaction between the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin is enhanced by controlling the epoxy equivalent of the epoxy resin, and the compatibility of all raw materials in the zinc-free primer is improved, so that the salt water resistance of the zinc-free primer coated on the aluminum plate is improved.
Preferably, the saturated monohydric alcohol in the component A comprises butanol and ethanol, and the weight ratio of the butanol to the ethanol is 4 (23-26).
By adopting the technical scheme, the isobutanol and the ethanol are compounded, so that the interaction between the alcohol-soluble phenolic resin and the n-butanol etherified melamine formaldehyde resin is further enhanced, and the compatibility of the raw materials in the zinc-free primer is improved, so that the salt water resistance of the zinc-free primer coated on the aluminum plate is improved.
Preferably, the antirust coating comprises zinc yellow and iron oxide red, and the weight ratio of the zinc yellow to the iron oxide red is (2-5): 10.
by adopting the technical scheme, the weight ratio of the zinc yellow to the iron oxide red is controlled, the three-dimensional network structure formed by the mutual crosslinking of the n-butyl alcohol etherified melamine formaldehyde resin and the alcohol-soluble phenol formaldehyde resin is enhanced, the compatibility of all raw materials in the zinc-free primer is improved, and the salt water resistance of the zinc-free primer coated on the aluminum plate is improved.
Preferably, the filler is selected from one or two of white carbon black and bentonite.
By adopting the technical scheme, the compatibility of the white carbon black and the bentonite with the rest raw materials of the zinc-free primer is higher, the interaction between the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin is enhanced, and the compatibility of the raw materials in the zinc-free primer is improved, so that the salt water resistance of the zinc-free primer coated on the aluminum plate is improved.
Preferably, the rust-preventive pigment is selected from one or more of phosphates and dichromates.
By adopting the technical scheme, the phosphate and the dichromate have excellent compatibility with the rest of the raw materials of the zinc-free primer, and have good compatibility with the base material of the aluminum plate, so that the zinc-free primer is suitable for the aluminum plate.
Preferably, the auxiliary agent is selected from one or more of an anti-settling agent, an antioxidant and a defoaming agent.
By adopting the technical scheme, the anti-settling agent and the defoaming agent can improve the compatibility of raw materials in the zinc-free primer, and the antioxidant can improve the antioxidant performance of the zinc-free primer, so that the zinc-free primer is suitable for aluminum plates.
In a second aspect, the present application provides a method for preparing a zinc-free primer, which adopts the following technical scheme:
a preparation method of a zinc-free primer comprises the following preparation steps:
mixing materials: uniformly mixing polyvinyl butyral, alcohol-soluble phenolic resin, epoxy resin, n-butyl alcohol etherified melamine formaldehyde resin, an anti-rust pigment, an anti-rust coating, a filling material, an auxiliary agent, xylene and saturated monohydric alcohol to prepare a component A;
mixing phosphoric acid and alcohol uniformly to obtain component B;
preparing materials: and uniformly mixing the component A and the component B to prepare the zinc-free primer.
By adopting the technical scheme, the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin are compounded, so that the zinc-free primer has excellent salt water resistance when being coated on an aluminum plate, and the preparation method is simple and convenient to operate.
In summary, the present application has the following beneficial effects:
1. because the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin are compounded, the n-butyl alcohol etherified melamine formaldehyde resin and the alcohol-soluble phenolic resin can be mutually crosslinked to form a three-dimensional network structure, so that the zinc-free primer has excellent salt water resistance when being coated on an aluminum plate;
2. the application preferably adopts the epoxy resin with the epoxy equivalent of 220-320g/eq, enhances the interaction between the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin, and improves the compatibility of all raw materials in the zinc-free primer, thereby improving the salt water resistance of the zinc-free primer when being coated on an aluminum plate;
3. according to the method, the alcohol-soluble phenolic resin and the n-butyl alcohol etherified melamine formaldehyde resin are compounded, so that the zinc-free primer has excellent salt water resistance when being coated on an aluminum plate, and the preparation method is simple and convenient to operate.
Detailed Description
The present application is further illustrated by the following examples, wherein the sources of the raw materials used in the present application are shown in Table 1, and the ethanol/ethanol used in the present application is 95 wt% ethanol, which is available from national pharmaceutical products chemical Co.
TABLE 1 sources used in the present application
Examples
Example 1
A non-zinc-free primer is prepared by the following steps:
mixing materials: uniformly mixing 13g of polyvinyl butyral, 4g of alcohol-soluble phenolic resin, 6g of epoxy resin, 3g of n-butyl alcohol etherified melamine formaldehyde resin, 11g of antirust pigment, 13g of antirust paint, 8g of filler, 3g of auxiliary agent, 10g of dimethylbenzene and 29g of saturated monohydric alcohol to prepare a component A,
uniformly mixing 24g of phosphoric acid and 76g of alcohol to obtain a component B;
preparing materials: mixing the following components in percentage by weight of 6: the component A and the component B of the 1 are mixed evenly to prepare the zinc-free primer.
The types of the used epoxy resin are as follows: EP-1307; the raw material is potassium phosphate; the used filling material is calcium carbonate; the rust-proof coating is zinc yellow; the saturated monohydric alcohol is isobutanol; the used auxiliary agent is a mixture of an anti-settling agent, an antioxidant and a defoaming agent, wherein the weight ratio of the anti-settling agent to the antioxidant to the defoaming agent is 1: 0.3: 0.5.
examples 2 to 8
Examples 2 to 8 are based on example 1 and differ from example 1 only in that: the preparation conditions of the zinc-free primer are different, and are shown in table 2.
TABLE 2 preparation conditions of zinc-free primers for examples 1-8
Example 9
Example 9 is based on example 1 and differs from example 1 only in that: equal mass of ethanol was substituted for isobutanol.
Examples 10 to 14
Examples 10 to 14 are based on example 1 and differ from example 1 only in that: the epoxy resins used differ in the epoxy equivalent weight, as shown in Table 3.
TABLE 3 epoxy equivalent of epoxy resins of examples 10 to 14
Examples 15 to 17
Examples 15 to 17 are based on example 14 and differ from example 14 only in that: the saturated monohydric alcohol is a mixture of isobutanol and ethanol, and the weight ratio of isobutanol to ethanol is different, and the specific table is shown in table 4.
TABLE 4 example 15-17 weight ratio of isobutanol and ethanol
Example 18
Example 18 is based on example 17 and differs from example 17 only in that: the antirust paint is iron oxide red.
Examples 19 to 21
Examples 19 to 21 are based on example 17 and differ from example 17 only in that: the antirust paint is a mixture of zinc yellow and iron oxide red, and the weight ratio of the zinc yellow to the iron oxide red is different, and the antirust paint is shown in Table 5.
TABLE 5 examples 19-21 weight ratios of Zinc yellow and iron oxide Red
Example 22
Example 22 is based on example 21 and differs from example 21 only in that: white carbon black with equal mass is used for replacing calcium carbonate.
Example 23
Example 23 is based on example 21 and differs from example 21 only in that: equal mass of bentonite is used to replace calcium carbonate.
Comparative example
Comparative example 1
Comparative example 1 is based on example 2 and differs from example 2 only in that: polyvinyl butyral with equal mass is used to replace alcohol-soluble phenolic resin.
Comparative example 2
Comparative example 2 is based on example 2 and differs from example 2 only in that: polyvinyl butyral with equal mass is used to replace n-butyl alcohol etherified melamine formaldehyde resin.
Comparative example 3
Comparative example 3 is based on example 2 and differs from example 2 only in that: the weight ratio of the component A to the component B in the preparation of the zinc-free primer is 3: 1.
performance test
The zinc-free primers obtained in examples 1 to 23 and comparative examples 1 to 3 were subjected to the following performance tests, and the aluminum plates for the tests were in accordance with the regulations of GB1728-79 and were obtained from Jiangsu national Steel products Co., Ltd.
And (3) testing the salt water resistance: according to the provisions of GB1763-79 method for testing chemical resistance of paint film, a paint film is prepared on an aluminum plate according to GB1727-79 method for preparing general paint film, the salt water resistance of the paint film is tested by using the method A, the time for the aluminum plate to not bubble, rust and fall is recorded, sodium chloride used in the test is purchased from national medicine group chemical reagent company, and the test result is shown in Table 6.
Testing of drying time: the surface drying time and the reagent drying time of the primer applied to the aluminum plate were measured according to the regulations of GB1728-79 method for measuring the drying time of paint films and putty films, and the test results are shown in Table 6.
TABLE 6 test results of examples 1-23 and comparative examples 1-3
Analyzing the data to obtain:
the zinc-free primer prepared by the method is suitable for aluminum plates, has excellent salt water resistance when being applied to the aluminum plates, has short surface drying time and actual drying time, can be quickly put into use after being coated, and as can be seen from the analysis of the examples 1 to 9, the example 1 is the best example among the examples 1 to 9.
Comparing the data of examples 1-9 with comparative examples 1-3, it can be seen that the alcohol-soluble phenol-formaldehyde resin and the n-butyl alcohol etherified melamine formaldehyde resin are added to the zinc-free primer, wherein the alcohol-soluble phenol-formaldehyde resin has excellent chemical resistance, the n-butyl alcohol etherified melamine formaldehyde resin has a large degree of crosslinking, the n-butyl alcohol etherified melamine formaldehyde resin can be crosslinked with the alcohol-soluble phenol-formaldehyde resin to form a three-dimensional network structure, the compatibility of the raw materials in the zinc-free primer is improved, and the alcohol-soluble phenol-formaldehyde resin and the n-butyl alcohol etherified melamine formaldehyde resin act synergistically to enable the zinc-free primer to have excellent salt water resistance when being coated on an aluminum plate.
The data of comparative examples 10 to 14 in the examples show that the interaction between the alcohol-soluble phenol resin and the n-butyl alcohol etherified melamine formaldehyde resin is enhanced by controlling the epoxy equivalent of the epoxy resin, and the compatibility of the raw materials in the zinc-free primer is improved, so that the salt water resistance of the zinc-free primer coated on the aluminum plate is improved. Because the viscosity of the EPU-1080E, EP-4000 type is lower, the compatibility with other raw materials of the zinc-free primer is higher, and the salt water resistance of the zinc-free primer coated on an aluminum plate is better.
Comparing the data of examples 15 to 17 with the data of examples 1 and 9, it can be seen that the interaction between the alcohol-soluble phenol-formaldehyde resin and the n-butanol etherified melamine formaldehyde resin is further enhanced by using the isobutanol and ethanol for compounding, the compatibility of the raw materials in the zinc-free primer is improved, and the salt water resistance of the zinc-free primer coated on the aluminum plate is improved. Wherein when the weight ratio of isobutanol to ethanol is 4: at 25, the zinc-free primer had superior salt water resistance when coated on aluminum panels.
Comparing the data of examples 18 to 21 with the data of example 17, it can be seen that the present application enhances the cross-linking ability of the n-butanol etherified melamine formaldehyde resin and the alcohol soluble phenol resin to form a three-dimensional network structure by controlling the weight ratio of the zinc yellow to the iron oxide red, and improves the compatibility of the raw materials in the zinc-free primer, thereby improving the salt water resistance of the zinc-free primer when applied to the aluminum plate. Wherein when the weight ratio of the zinc yellow to the iron oxide red is 3: when 10, the zinc-free primer has better salt water resistance when being coated on an aluminum plate.
Comparing the data of examples 22-23 with the data of example 21, it can be seen that the compatibility of the white carbon black and bentonite with the rest of the raw materials of the zinc-free primer is high, the interaction between the alcohol-soluble phenol-formaldehyde resin and the n-butyl alcohol etherified melamine formaldehyde resin is enhanced, the compatibility of the raw materials in the zinc-free primer is improved, and the salt water resistance of the zinc-free primer coated on the aluminum plate is improved. Because the white carbon black particles are smaller, the distribution is uniform, and the compatibility with the rest zinc-free primer raw materials is higher, when the white carbon black is used as the filler, the saline water resistance of the zinc-free primer coated on the aluminum plate is better.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (4)
1. The zinc-free primer is characterized by comprising the following raw materials in percentage by weight (5-6.5): 1, wherein the component A comprises 10-15 parts of polyvinyl butyral, 3-5 parts of alcohol-soluble phenolic resin, 5-8 parts of epoxy resin, 2-5 parts of n-butyl alcohol etherified melamine formaldehyde resin, 8-12 parts of anti-rust pigment, 10-15 parts of anti-rust coating, 6-10 parts of filler, 3-5 parts of auxiliary agent, 8-12 parts of dimethylbenzene and 25-35 parts of saturated monohydric alcohol by weight; the component B comprises 20-30 parts of phosphoric acid and 70-80 parts of alcohol by weight;
the epoxy equivalent of the epoxy resin is 220-320 g/eq;
the filling material is selected from one or two of white carbon black and bentonite;
the antirust coating comprises zinc yellow and iron oxide red, wherein the weight ratio of the zinc yellow to the iron oxide red is (2-5): 10;
the antirust pigment is selected from one or more of phosphate and dichromate.
2. The zinc-free primer according to claim 1, wherein: the saturated monohydric alcohol in the component A comprises isobutanol and ethanol, and the weight ratio of the isobutanol to the ethanol is 4 (23-26).
3. The zinc-free primer according to claim 1, wherein: the auxiliary agent is selected from one or more of an anti-settling agent, an antioxidant and a defoaming agent.
4. A method of preparing a zinc free primer according to claims 1-3 comprising the steps of:
mixing materials: uniformly mixing polyvinyl butyral, alcohol-soluble phenolic resin, epoxy resin, n-butyl alcohol etherified melamine formaldehyde resin, an antirust pigment, an antirust coating, a filler, an auxiliary agent, xylene and saturated monohydric alcohol to prepare a component A;
mixing phosphoric acid and alcohol uniformly to obtain component B;
preparing materials: and uniformly mixing the component A and the component B to prepare the zinc-free primer.
Priority Applications (1)
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| CN113174170B true CN113174170B (en) | 2022-06-03 |
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| US4362847A (en) * | 1980-05-22 | 1982-12-07 | Shell Oil Company | Heat-curable thermosetting resin binder compositions comprising a non-acidic resinous compound, a non-acidic polyester cross-linking agent, and a transesterification catalyst |
| CN101928507B (en) * | 2010-08-24 | 2013-12-18 | 中国电力科学研究院 | Low-surface treatment rusty rust inhibiting primer for hot galvanized steel |
| CN102643594A (en) * | 2011-02-22 | 2012-08-22 | 项妙祥 | Durable fresh-maintained preservative primer |
| CN102993859B (en) * | 2012-11-28 | 2016-08-24 | 安徽开林新材料股份有限公司 | A kind of Zinc powder-free shop primer and preparation method thereof |
| CN103013303B (en) * | 2012-12-25 | 2015-07-22 | 广州慧谷工程材料有限公司 | Inner paint of metal beverage food can and preparation method and application thereof |
| CN103305078B (en) * | 2013-06-26 | 2016-04-13 | 中国科学院化学研究所 | A kind of hydrophobic material and the application in the preparation of offset printing plate thereof |
| CN104449201A (en) * | 2014-08-28 | 2015-03-25 | 湖南中汉高分子材料科技有限公司 | Rust-proof coating |
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Denomination of invention: A zinc free primer and its preparation method Effective date of registration: 20220927 Granted publication date: 20220603 Pledgee: Shandong Wendeng Rural Commercial Bank Co.,Ltd. Pledgor: Weihai zhendu Chemical Co.,Ltd. Registration number: Y2022980016569 |
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Denomination of invention: A zinc free primer and its preparation method Granted publication date: 20220603 Pledgee: Weihai Commercial Bank Co.,Ltd. Qiongshan Branch Pledgor: Weihai zhendu Chemical Co.,Ltd. Registration number: Y2024980003183 |