A coating for landing ship decks and its preparation method

Abstract

This invention relates to the field of coating composition technology, specifically disclosing a coating for landing ship decks and its preparation method. After curing at room temperature on large landing ships, the coating exhibits corrosion resistance, impact resistance, high adhesion strength, and excellent shear and crush resistance, enabling it to transport large vehicles, infantry armored vehicles, and tanks without impact or crush damage. The coating also demonstrates good corrosion resistance in marine environments.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating compositions, and more particularly to a coating for landing ship decks and a preparation method thereof. BACKGROUND

[0002] At present, the deck coatings for domestic landing ships often refer to the design ideas of the deck coatings for civilian cargo ships and epoxy floor coatings. The coatings have certain wear resistance and corrosion resistance, and generally use epoxy resin filled with a large amount of glass flake, silicon powder, etc. as the A component, and modified aliphatic amine such as Ancamine 2280 of Air Chemical, aliphatic amine containing benzene ring such as Ancamine 2422 of Air Chemical to achieve high hardness and high wear resistance. This kind of scheme combines the design ideas of floor coatings and can meet the rolling of vehicles with ordinary rubber tires on ordinary cargo ships, but cannot cope with the repeated rolling of special vehicles such as tanks and armored vehicles. The coating is brittle and easy to break during the rolling process of heavy tracked equipment. The broken part is accelerated to corrode by chloride in seawater or sea breeze. The warship staying at the seaside is also easy to powder under the influence of light, so solving the anti-shearing rolling and anti-coating powder of the deck coating for domestic landing ships has become an important technical difficulty.

[0003] Therefore, how to develop a coating composition for landing ship decks at room temperature is a technical problem that those skilled in the art need to solve. SUMMARY

[0004] Therefore, the present application provides a coating for landing ship decks and a preparation method thereof.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A coating for landing ship decks comprises A component and B component. In terms of total material weight, wherein,

[0007] The A component comprises: butadiene styrene rubber modified phenolic resin solution 20-25%, carbon fiber filler 5-10%, wear-resistant filler 10-15%, bulk type filler 5-10%, macromolecular epoxy resin 10-15%, phenolic epoxy resin 15-20%, amino resin 1-2%, solvent 5-10%, thixotropic agent 0.2-1%, and defoaming agent 0.2-1%;

[0008] The B component comprises: modified alicyclic amine or aromatic amine curing agent 8-10%, and nonyl phenol 3-5%.

[0009] Further, the solution of styrene butadiene rubber modified phenolic resin is prepared by melting brominated phenolic resin and styrene butadiene rubber in a mass ratio of 2:1-4:1 at 160-180°C in a reaction kettle, then adding 0.5% of the amount of zinc oxide to the phenolic resin, stirring, and reacting at 160-180°C for 40-60 min to obtain styrene butadiene rubber modified phenolic resin, and then pouring into a xylene solvent to prepare a 50% mass solid content styrene butadiene rubber modified phenolic resin solution.

[0010] Further, the brominated phenolic resin is a brominated phenolic resin for rubber vulcanization, such as SP1055, SP1056 of Saint-Lucot, 201 octyl vulcanizing resin of Shijiazhuang Junlong Chemical Product Sales Co., Ltd., and brominated phenolic resin of Shandong Qingdao Funo EFN-SZ22, which has the function of unsaturated double bonds in the vulcanized rubber at high temperature; the styrene butadiene rubber has a styrene content of more than 40% and a Shore hardness of ≥70, such as 659, 701, 684 of Taiwan Yingquan Chemical, LG501, LG502, LG411 of LG Chemical.

[0011] Further, the carbon fiber is selected from T300 of Japan Toray Chemical.

[0012] Further, the wear-resistant filler is selected from a mixture of spherical silicon oxide or zirconium dioxide and graphite in a mass ratio of 3:1-5:1; the spherical silicon oxide is selected from Wincat DP-0110, DP-0111, DP-0112 or DP-0115; the zirconium dioxide is selected from fused zirconium dioxide, which is sold by Zhengzhou Juepai Chemical Product Co., Ltd. and Zhengzhou Chengao Chemical Co., Ltd.

[0013] Further, the body filler is selected from one or a combination of several of talc powder, wollastonite powder, and precipitated barium sulfate.

[0014] Further, the macromolecular epoxy resin is selected from linear epoxy solutions such as 50% xylene solution of NSPN-301*75, NSPN-134*80, NSPN-901*75, and NSPN-905 resin of Nanya Epoxy Resin; the phenolic epoxy resin is selected from those with a functionality of 2.3-3, such as EPALLOY 8240E, 8240, and 8250 of CVC in the United States and NPPN 631 of Nanya; the amino resin is selected from CYMEL 325, 385, and 327 with higher activity; and the solvent is selected from xylene combined with solvents that have the ability to dissolve epoxy, such as butyl acetate, and the mass ratio of xylene to butyl acetate is 3:1-9:1, with xylene being dominant, which is conducive to the compatibility of the styrene butadiene rubber modified phenolic resin solution.

[0015] Furthermore, the thixotropic agent is selected from one or a combination of two of fumed silica and polyamide wax powder. The fumed silica is selected from Degussa's A200, R972, Wacker's N20, R202, etc., and the polyamide wax is selected from Arkema's Crayvallac Super, Crayvallac Ultra. The defoamer is selected from Evonik's Tego Airex940, Tego Airex920, Tego Airex990, Tego Airex991, Tego Airex900, Tego Airex978, Tego Foamex N, etc., which are silicone or fluorosilicone defoamers combined with alkynol Surfynol 118. Surfynol 118 is used in combination with silicone additives at a mass ratio of 1:1 to 3:1.

[0016] Furthermore, the modified alicyclic amine or aromatic amine curing agent is selected from modified amines such as Amicure 101, Amicure PACM, Ancamine 1618, and Ancamine 2280. This series of alicyclic amines has the characteristics of high strength and high reactivity, and can effectively avoid the phenomenon of ammonia bloom during use; the nonylphenol is selected from commercially available products, such as those sold by Shandong Feihong New Materials Co., Ltd. and Yunsheng Chemical (Shandong) Co., Ltd.

[0017] Another object of the present invention is to provide a method for preparing the above-mentioned coating for landing ship decks, comprising the following steps:

[0018] (1) Mix the styrene-butadiene rubber modified phenolic resin solution, carbon fiber filler, wear-resistant filler, extender filler, macromolecular epoxy resin, phenolic epoxy resin, amino resin, solvent, thixotropic agent, and defoamer in proportion, and then shear at high speed at 65-75℃ for 40 minutes to obtain component A.

[0019] (2) Mix the modified cycloaliphatic amine or aromatic amine curing agent and nonylphenol in proportion to obtain component B;

[0020] (3) Mix component A and component B to obtain the coating for landing ship deck.

[0021] Specifically, the coating composition is as follows:

[0022] Component A of the coating (epoxy component)

[0023] A. Styrene-butadiene rubber modified phenolic resin solution 20-25%,

[0024] B. Carbon fiber filler 5-10%

[0025] C. Wear-resistant filler 10-15%

[0026] D. 5-10% of bulk fillers

[0027] E. 10-15% macromolecular epoxy resin

[0028] F. Phenolic epoxy resin 15-20%

[0029] G. Amino resin 1-2%,

[0030] H. Solvent 5-10%

[0031] I. Thixotropic agent 0.2-1%,

[0032] J. Defoamer 0.2-1%,

[0033] Component B of the coating

[0034] K. 8-10% modified alicyclic amine or aromatic amine curing agent

[0035] L. nonylphenol 3-5%

[0036] Preparation process of component A: First, brominated phenolic resin and styrene-butadiene rubber are melted in a reaction vessel at 160-180℃ in a ratio of 2:1-4:1. Then, 0.5% zinc oxide (based on the amount of phenolic resin) is added and stirred. The reaction is carried out at 160-180℃ for 40-60 minutes. Then, the solution is poured into xylene solvent to prepare a 50% (by mass) styrene-butadiene rubber modified phenolic resin solution A. During the preparation of the coating, components A, B, C, D, E, F, G, H, I, and J are added to a shearing cylinder and the temperature is maintained at 65-75℃ for 40 minutes to obtain component A.

[0037] Preparation process of component B: Mix K and I in the correct proportions and stir well to obtain component B.

[0038] Mix the prepared components A and B, and brush or roll them onto a substrate with an anchor pattern depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers, and test the performance after curing at room temperature for 7 days.

[0039] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg at 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard and ASTM B117 neutral salt spray test for 3000h, corrosion diffusion ≤3mm; QUV testing according to ASTM G154 and evaluation according to ISO 4628-6; after 1000h QUV testing, the coating chalking level was 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h and the adhesion was still 4A-5A according to Method A in ASTM D3359.

[0040] It should be noted that developing deck coatings with high wear resistance, high adhesion, and high shear strength requires combining the characteristics of phenolic resin, epoxy resin, and rubber. Phenolic resin has high adhesion and high strength, but its drawback is high brittleness; although rubber generally has high toughness, good wear resistance, and anti-powdering properties, it has no adhesion to metal substrates; macromolecular epoxy resin has high adhesion, good wetting and encapsulating effects on fillers, and good toughness; phenolic epoxy resin has multiple functional groups that can improve crosslinking density, but phenolic epoxy resins with an epoxy functionality exceeding 3 are prone to defects such as pinholes and shrinkage cavities in the coating appearance.

[0041] Specifically, in this invention, both the amino resin and the macromolecular epoxy resin contain secondary hydroxyl groups. The activation of the wax powder and the branching of the macromolecular epoxy resin by the amino resin are achieved through shearing at 65-75°C. The functionality of the macromolecular epoxy resin is approximately 1.9; therefore, the combination of the macromolecular epoxy resin and the amino resin can achieve a modification effect. The phenolic epoxy resin improves the crosslinking density. The styrene-butadiene rubber-modified phenolic resin solution exhibits high toughness and high adhesion. Furthermore, the phenolic resin and epoxy resin do not react when coexisting at room temperature. After the addition of the curing agent modified amine, the hydroxymethyl groups of the phenolic resin react with the modified amine. The formation of Mannich bases catalyzes the reaction of phenolic hydroxyl groups in phenolic resin with epoxy resin at room temperature. Rubber can alleviate stress during repeated rolling processes by heavy machinery. Compared to PVC rubber flooring used in airports, styrene-butadiene rubber has a higher Shore hardness and will not experience coating damage. The residual double bonds and unreacted phenolic hydroxyl groups after the reaction of styrene-butadiene rubber with phenolic resin can prevent the epoxy resin from undergoing severe performance degradation due to sun exposure. Furthermore, the wear-resistant filler uses a combination of high-hardness filler and lubricating filler, and the appropriate addition of extender filler can alleviate the mutual wear between high-hardness fillers.

[0042] Modified alicyclic amines or aromatic amines are used in the curing agent to achieve a reasonable Shore hardness. Nonylphenol, as a monofunctional phenol, can react slowly with epoxy resin, which can alleviate the phenomenon of a sharp increase in crosslinking density, a sharp increase in internal stress, and appearance defects in the coating during the curing process.

[0043] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0044] This invention discloses a coating for landing ship decks. After being applied to large landing ships and cured at room temperature, the coating exhibits properties such as corrosion resistance, impact resistance, high adhesion strength, and excellent resistance to shearing and crushing. It can realize the transportation function of large vehicles, infantry armored vehicles, and tanks without causing impact damage or crushing damage. The coating also has good corrosion resistance in marine environments. Detailed Implementation

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1:

[0047] A coating for landing ship decks, comprising the following components:

[0048]

[0049] After mixing components A and B of the coating, apply it by roller or squeegee onto a substrate with an anchor texture depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers and cure at room temperature for 7 days before testing performance.

[0050] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg at 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard; neutral salt spray test at ASTM B117 3000h, corrosion ≤3mm; QUV test according to ASTM G154 and QUV 1000h evaluation according to ISO 4628-6, coating chalking level 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h, and adhesion was still 5A according to ASTM D3359 Method A.

[0051] Example 2

[0052] A coating for landing ship decks, comprising the following components:

[0053]

[0054] After mixing components A and B of the coating, apply it by roller or squeegee onto a substrate with an anchor texture depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers and cure at room temperature for 7 days before testing performance.

[0055] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg after 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard; 3000h neutral salt spray test according to ASTM B117, corrosion ≤3mm; QUV test according to ASTM G154 and QUV evaluation according to ISO 4628-6; after 1000h, the coating chalking level was 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h and the adhesion was still 5A according to Method A in ASTM D3359.

[0056] Example 3

[0057] A coating for landing ship decks, comprising the following components:

[0058]

[0059] After mixing components A and B of the coating, apply it by roller or squeegee onto a substrate with an anchor texture depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers and cure at room temperature for 7 days before testing performance.

[0060] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg after 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard; 3000h neutral salt spray test according to ASTM B117, corrosion ≤3mm; QUV test according to ASTM G154 and QUV evaluation according to ISO 4628-6; after 1000h, the coating chalking level was 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h and the adhesion was still 5A according to Method A in ASTM D3359.

[0061] Example 4

[0062] A coating for landing ship decks, comprising the following components:

[0063]

[0064] After mixing components A and B of the coating, apply it by roller or squeegee onto a substrate with an anchor texture depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers and cure at room temperature for 7 days before testing performance.

[0065] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg after 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard; 3000h neutral salt spray test according to ASTM B117, corrosion ≤3mm; QUV test according to ASTM G154 and QUV evaluation according to ISO 4628-6; after 1000h, the coating chalking level was 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h and the adhesion was still 5A according to Method A in ASTM D3359.

[0066] Example 5

[0067] A coating for landing ship decks, comprising the following components:

[0068]

[0069]

[0070] After mixing components A and B of the coating, apply it by roller or squeegee onto a substrate with an anchor texture depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers and cure at room temperature for 7 days before testing performance.

[0071] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg after 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard; 3000h neutral salt spray test according to ASTM B117, corrosion ≤3mm; QUV test according to ASTM G154 and QUV evaluation according to ISO 4628-6; after 1000h, the coating chalking level was 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h and the adhesion was still 5A according to Method A in ASTM D3359.

[0072] Example 6

[0073] A coating for landing ship decks, comprising the following components:

[0074]

[0075]

[0076] After mixing components A and B of the coating, apply it by roller or squeegee onto a substrate with an anchor texture depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers and cure at room temperature for 7 days before testing performance.

[0077] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg after 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard; 3000h neutral salt spray test according to ASTM B117, corrosion ≤3mm; QUV test according to ASTM G154 and QUV evaluation according to ISO 4628-6; after 1000h, the coating chalking level was 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h and the adhesion was still 5A according to Method A in ASTM D3359.

[0078] Example 7

[0079] A coating for landing ship decks, comprising the following components:

[0080]

[0081]

[0082] After mixing components A and B, apply the mixture by roller or trowel onto a substrate with an anchor texture depth of 38-76 micrometers after sandblasting. Control the dry film thickness to 800-1500 micrometers and cure at room temperature for 7 days before testing performance.

[0083] The coating performance was tested according to ASTM G8 standard: cathodic disbondment test at 40℃ / -1.5V / 30d, corrosion radius ≤6mm; shear strength on steel ≥20MPa according to ASTM D1002; compressive strength ≥50MPa and elongation at break ≥0.5% according to ASTM D695; Shore hardness ≥80; Taber abrasion ≤200mg after 1000 revolutions using an H10 abrasive wheel according to ASTM D4060; corrosion resistance was tested according to C5-M standard; 3000h neutral salt spray test according to ASTM B117, corrosion ≤3mm; QUV test according to ASTM G154 and QUV evaluation according to ISO 4628-6; after 1000h, the coating chalking level was 0-0.5; after QUV testing, the sample was placed in the laboratory at 23±2℃ / 24h and the adhesion was still 5A according to Method A in ASTM D3359.

[0084] Based on the above analysis, it can be seen that the coating of the present invention, after being applied to a large landing ship and cured at room temperature, has properties such as corrosion resistance, impact resistance, high adhesion strength, and excellent resistance to shearing and crushing. It can realize the transportation function of large vehicles, infantry armored vehicles, and tanks, and will not cause impact damage or crushing damage. The coating has good corrosion resistance in marine environments.

[0085] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coating for the decks of amphibious vessels, characterized in that, Comprise: A component and B component; In The total weight of the material is 100%, wherein the A component comprises: 20-25% of styrene-butadiene rubber modified phenolic resin solution, 5-10% of carbon fiber filler, 10-15% of wear-resistant filler, 5-10% of body quality filler, 10-15% of macromolecular epoxy resin, 15-20% of phenolic epoxy resin, 1-2% of amino resin, 5-10% of solvent, 0.2-1% of thixotropic agent, and 0.2-1% of defoaming agent; The B component comprises: 8-10% of modified alicyclic amine or aromatic amine curing agent and 3-5% of nonyl phenol; The styrene-butadiene rubber modified phenolic resin solution is obtained by melting brominated phenolic resin and styrene-butadiene rubber in a mass ratio of 2:1-4:1 in a reaction kettle at 160-180°C, then adding 0.5% of zinc oxide based on the amount of phenolic resin, stirring, and reacting at 160-180°C for 40-60 min to obtain styrene-butadiene rubber modified phenolic resin, and then pouring into dimethylbenzene solvent to prepare a 50% mass solid content styrene-butadiene rubber modified phenolic resin solution; The brominated phenolic resin is a phenolic resin used for rubber vulcanization, and the styrene content in the styrene-butadiene rubber is more than 40% and the Shore hardness is ≥70.

2. A coating for landing craft decks according to claim 1, characterised in that, The carbon fiber is selected from Japan Toray Chemical T300.

3. A coating for landing craft decks according to claim 1, characterised in that, The wear-resistant filler is selected from a mixture of spherical silicon dioxide or zirconium dioxide and graphite in a mass ratio of 3:1-5:

1.

4. A coating for landing craft decks according to claim 1, characterised in that, The body quality filler is selected from one or a combination of several of talc powder, wollastonite powder, and precipitated barium sulfate.

5. A coating for landing craft decks according to claim 1, characterised in that, The macromolecular epoxy resin is selected from a linear epoxy solution; the functionality of the phenolic epoxy resin is 2.3-3; the amino resin is selected from CYMEL 325, 385, and 327; and the solvent is selected from dimethylbenzene combined with solvents having the ability to dissolve epoxy.

6. A coating for landing craft decks according to claim 1, characterised in that, The thixotropic agent is selected from one or a combination of two of fumed silica and polyamide wax powder; and the defoaming agent is selected from a combination of a siliceous or fluorosilicon additive and an alkyne alcohol Surfynol 118.

7. A coating for a landing craft deck according to claim 6, characterised in that, The defoaming agent is used in combination with a siliceous additive in a mass ratio of 1:1-3:

1.

8. A method of preparing a coating for use on the deck of a landing craft as claimed in claim 1 characterised in that, The method comprises the following steps: (1) mixing the styrene-butadiene rubber modified phenolic resin solution, carbon fiber filler, wear-resistant filler, body quality filler, macromolecular epoxy resin, phenolic epoxy resin, amino resin, solvent, thixotropic agent, and defoaming agent in proportion, and then shearing at a high speed for 40 min at 65-75°C to obtain the A component; (2) stirring the modified alicyclic amine or aromatic amine curing agent and nonyl phenol in proportion to obtain the B component; (3) mixing the A component and the B component to obtain the paint for the landing ship deck.

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