Oxime-based multi-component anti-skinning composition and application thereof

Abstract

The invention belongs to the technical field of coatings, and discloses a multi-component anti-skinning composition based on oxime and an application of the multi-component anti-skinning composition. The compound is composed of oxime compounds, and specifically comprises acetoxime, propionaldehyde oxime, 2-butanone oxime, butyraldehyde oxime, 2-pentanone oxime, 3-pentanone oxime, methyl isopropyl ketoxime, methyl isobutyl ketoxime, pinacol oxime, cyclopentanone oxime, 2-hexanone oxime, 3-hexanone oxime, cyclohexanone oxime, 2, 2, 4, 6-tetramethyl-3-pentanone oxime, 2, 2, 4, 6-tetramethyl-3-pentanone oxime, 2, 2, 4, 6-tetramethyl-3-pentanone oxime, 2, 2, 4, 6-tetramethyl-3- the compound is selected from three or more of 3, 4, 4-tetramethyl-3-pentanone oxime, 4-methyl-2-pentanone oxime, 2-heptanone oxime, 3-heptanone oxime, 4-heptanone oxime, cycloheptanone oxime, 2-nonanone oxime, 5-methyl-2-hexanone oxime, 5-methyl-3-heptanone oxime, 6-methyl-2-heptanone oxime, benzaldoxime and acetophenone oxime. The anti-skinning coating has more excellent anti-skinning performance, and the quality of the oxidation drying type coating can still be stable after long-time storage.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to an oxime-based multi-component anti-skinning composition and its application. Background Technology

[0002] When air-drying oxidative film-forming coatings are stored, the surface of the coating reacts with the air. After the solvent evaporates, oxidative polymerization occurs on the surface of the coating, forming a film, also known as a skinning phenomenon. This film formation is irreversible and must be removed before application. Skinning affects the internal drying balance of the coating, so anti-skinning agents are typically added during the coating production process to effectively prevent skinning during storage.

[0003] The prior art CN201410689246.4 discloses a smooth and efficient anti-skinning coating, in which the main component of the anti-skinning agent is only methyl ethyl ketone oxime. Although methyl ethyl ketone oxime is currently the most widely used anti-skinning compound with excellent anti-skinning effect, its toxicity makes finding a substitute an urgent problem to be solved. Moreover, the anti-skinning agent in this invention has a single component, and compared with anti-skinning agents with more components, its effect is slightly worse and it causes greater environmental pollution. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-component anti-skinning composition based on oxime and its application, which solves the problem that existing single anti-skinning agents have high-boiling-point compounds that are difficult to volatilize and low-boiling-point compounds that are easy to volatilize.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] This invention provides a multi-component anti-skinning composition based on oxime, which consists of three or more oxime compounds.

[0007] Preferably, in the above-mentioned oxime-based multi-component anti-skinning composition, the oxime compounds include acetone oxime, propionaldehyde oxime, 2-butanone oxime, butanaldehyde oxime, 2-pentanone oxime, 3-pentanone oxime, methyl isopropyl ketone oxime, methyl isobutyl ketone oxime, pinacolone oxime, cyclopentanone oxime, 2-hexanone oxime, 3-hexanone oxime, cyclohexanone oxime, 2,2,4, A mixture of three or more of the following in any proportion: 4-tetramethyl-3-pentanone oxime, 4-methyl-2-pentanone oxime, 2-heptanone oxime, 3-heptanone oxime, 4-heptanone oxime, cycloheptanone oxime, 2-nonanone oxime, 5-methyl-2-hexanone oxime, 5-methyl-3-heptanone oxime, 6-methyl-2-heptanone oxime, benzaldehyde oxime, and acetophenone oxime.

[0008] Preferably, in the above-mentioned oxime-based multi-component anti-skinning composition, the purity of the oxime compound is ≥99.5%.

[0009] Preferably, in the above-mentioned oxime-based multi-component anti-skinning composition, the oxime compound comprises three or more of the following in any proportion: acetone oxime, 2-butanone oxime, 2-pentanone oxime, 2-pentanone oxime, methyl isopropyl ketone oxime, methyl isobutyl ketone oxime, 2-hexanone oxime, cyclohexanone oxime, 2-heptanone oxime, and 2-nonanone oxime.

[0010] Preferably, in the above-mentioned oxime-based multi-component anti-skinning composition, the oxime compound comprises three or more of 2-butanone oxime, 2-pentanone oxime, methyl isopropylone oxime, methyl isobutylone oxime, and cyclohexanone oxime in any proportion.

[0011] The present invention also provides the application of an oxime-based multi-component anti-skinning composition in an anti-skinning agent for oxidative drying coatings.

[0012] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention provides a multi-component anti-skinning composition based on oximes. Anti-skinning compositions composed of three or more oximes exhibit superior anti-skinning performance, ensuring stable quality of oxidative drying coatings even after prolonged storage. Compared to single-component anti-skinning compositions, this invention demonstrates superior anti-skinning performance, effectively inhibiting skinning without disrupting the original oxidative drying balance within the coating. It effectively solves the problem of high-boiling-point substances being difficult to volatilize and low-boiling-point substances being easily volatilized in single-component anti-skinning compositions. Detailed Implementation

[0014] This invention provides a multi-component anti-skinning composition based on oxime, which consists of three or more oxime compounds.

[0015] In this invention, the oxime compounds preferably comprise three or more of the following in any proportion: acetone oxime, propionaldehyde oxime, 2-butanone oxime, butanaldehyde oxime, 2-pentanone oxime, 3-pentanone oxime, methyl isopropyl ketone oxime, methyl isobutyl ketone oxime, pinacolone oxime, cyclopentanone oxime, 2-hexanone oxime, 3-hexanone oxime, cyclohexanone oxime, 2,2,4,4-tetramethyl-3-pentanone oxime, 4-methyl-2-pentanone oxime, 2-heptanone oxime, 3-heptanone oxime, 4-heptanone oxime, cycloheptanone oxime, 2-nonanone oxime, 5-methyl-2-hexanone oxime, 5-methyl-3-heptanone oxime, 6-methyl-2-heptanone oxime, benzaldehyde oxime, and acetophenone oxime.

[0016] In this invention, the structure of the oxime compound is shown below:

[0017]

[0018] In this invention, the oxime compound is further preferably a mixture of three or more of the following in any proportion: acetone oxime, 2-butanone oxime, 2-pentanone oxime, 2-pentanone oxime, methyl isopropyl ketone oxime, methyl isobutyl ketone oxime, 2-hexanone oxime, cyclohexanone oxime, 2-heptanone oxime, and 2-nonanone oxime.

[0019] In this invention, the oxime compound more preferably comprises three or more of 2-butanone oxime, 2-pentanone oxime, methyl isopropylone oxime, methyl isobutylone oxime, and cyclohexanone oxime in any proportion.

[0020] In this invention, the purity of the oxime compound is preferably ≥99.5%.

[0021] The present invention also provides the application of an oxime-based multi-component anti-skinning composition in an anti-skinning agent for oxidative drying coatings.

[0022] 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.

[0023] Examples 1-10

[0024] The composition of the oxime-based multi-component anti-scabbing composition is shown in Table 1.

[0025] Table 1. Composition of the oxime-based multi-component anti-scabbing composition

[0026]

[0027] The oxime-based multi-component anti-skinning compositions of Examples 1-10 were used as anti-skinning agents in alkyd resin coatings, and the composition of the alkyd resin coatings is shown in Table 2.

[0028] Table 2 Composition of alkyd resin coatings

[0029] Components mass fraction / % Medium oil content alkyd resin 20 C9 petroleum resin 7 200# solvent oil 7 Activated calcium carbonate (stearic acid modified) 58 Talc powder (800 mesh) 6.7 Polyurethane dispersants 0.4 Organosilicon leveling agent 0.3 Drying agent (cobalt + calcium cycloalkanoate) 0.5 Anti-skinning agent 0.1

[0030] The preparation method of alkyd resin coating includes the following steps: medium-oil alkyd resin, C9 petroleum resin and 50% of 200# solvent oil are mixed in a dispersion tank and stirred at 800 r / min for 10 min; activated calcium carbonate, talc powder and polyurethane dispersant are added in sequence and stirred at low speed for 15 min; the speed is increased to 1500 r / min and stirred for 15 min; silicone leveling agent, anti-skinning agent and the remaining 50% of 200# solvent oil are added and stirred at 600 r / min for 10 min; finally, a drying agent is added and stirred for 5 min until completely uniform.

[0031] Alkyd resin coatings were placed at room temperature for two months and then accelerated to 50°C for four weeks, and the skinning effect of the coatings was observed. A control example without anti-skinning agent was used. The results are shown in Table 3.

[0032] Table 3 Skinning of Alkyd Resin Coatings

[0033]

[0034]

[0035] As shown in Table 3, the oxime-based multi-component anti-skinning composition of this invention exhibits excellent anti-skinning properties, and the coating quality remains stable even after prolonged storage. It overcomes the problem of high-boiling-point substances being difficult to volatilize and low-boiling-point substances being easily volatilized in single-component formulations. The anti-skinning composition of this invention can replace single-component anti-skinning compounds in coatings.

[0036] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multi-component anti-scabbing composition based on oxime, characterized in that, It consists of three or more oxime compounds.

2. The oxime-based multi-component anti-scabbing composition according to claim 1, characterized in that, The oxime compounds comprise three or more of the following in any proportion: acetone oxime, propionaldehyde oxime, 2-butanone oxime, butanaldehyde oxime, 2-pentanone oxime, 3-pentanone oxime, methyl isopropylone oxime, methyl isobutylone oxime, pinacolone oxime, cyclopentanone oxime, 2-hexanone oxime, 3-hexanone oxime, cyclohexanone oxime, 2,2,4,4-tetramethyl-3-pentanone oxime, 4-methyl-2-pentanone oxime, 2-heptanone oxime, 3-heptanone oxime, 4-heptanone oxime, cycloheptanone oxime, 2-nonanone oxime, 5-methyl-2-hexanone oxime, 5-methyl-3-heptanone oxime, 6-methyl-2-heptanone oxime, benzaldehyde oxime, and acetophenone oxime.

3. A multi-component anti-scabbing composition based on oxime according to claim 1 or 2, characterized in that, The purity of the oxime compound is ≥99.5%.

4. The oxime-based multi-component anti-scabbing composition according to claim 2, characterized in that, The oxime compounds comprise three or more of the following in any proportion: acetone oxime, 2-butanone oxime, 2-pentanone oxime, 2-pentanone oxime, methyl isopropylone oxime, methyl isobutylone oxime, 2-hexanone oxime, cyclohexanone oxime, 2-heptanone oxime, and 2-nonanone oxime.

5. The oxime-based multi-component anti-scabbing composition according to claim 4, characterized in that, The oxime compounds comprise three or more of the following in any proportion: 2-butanone oxime, 2-pentanone oxime, methyl isopropylone oxime, methyl isobutylone oxime, and cyclohexanone oxime.

6. The use of the oxime-based multi-component anti-skinning composition according to any one of claims 1 to 5 in an anti-skinning agent for oxidative drying coatings.

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