Anti-skinning agent composition and application thereof
By using a combination of 2-pentanone oxime and methyl isobutylone oxime as an anti-skinning agent, the toxicity problem of 2-butanone oxime is solved, providing a low-toxicity, environmentally friendly anti-skinning solution that maintains the drying balance of the coating and is suitable for oxidative polymerization coatings.
Patent Information
- Application Number
- CN202511241370.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2025-11-11
AI Technical Summary
The existing anti-skinning agent 2-butanone oxime is toxic, which limits its widespread use, and it is difficult to find a substitute with low toxicity and good anti-skinning performance using current technology.
An anti-skinning agent composition consisting of 2-pentanone oxime and methyl isobutylone oxime is used as a substitute for 2-butanone oxime in oxidative polymerization coatings. The 2-pentanone oxime content is ≤98% by mass, the methyl isobutylone oxime content is ≥2% by mass, and the purity is ≥99.5%, in order to prevent the coating from skinning and maintain drying balance.
It achieves a low-toxicity, environmentally friendly anti-skinning effect, preventing paint from skinning without disrupting the drying balance, and replacing 2-butanone oxime as a green and environmentally friendly anti-skinning agent.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to the field of coating technology, and in particular to an anti-skinning agent composition and its application. Background Technology
[0002] Paints, such as alcohol-based and acid-based paints, are prone to reacting with air during storage, undergoing oxidative polymerization and forming a skin on the paint surface—a phenomenon known as paint skinning. This should be avoided in actual use, as it disrupts the paint's internal drying balance and results in paint waste. If some skin remains in the paint, it can also lead to an uneven surface after subsequent painting. Adding an anti-skinning composition can effectively prevent this phenomenon.
[0003] Currently, 2-Butanone oxime is the most widely used and most effective anti-skinning compound, possessing a series of advantages such as low odor, small dosage, wide applicability, prevention of skinning and discoloration in coatings after application, and no impact on the coating itself. However, its application is limited due to the inherent toxicity of 2-Butanone oxime.
[0004] Therefore, the research and development of ketoxime anti-scabbing compositions with low toxicity and good anti-scabbing properties is of great significance. Summary of the Invention
[0005] The purpose of this invention is to provide an anti-skinning agent composition and its application, addressing the shortcomings of existing technologies.
[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:
[0007] The present invention provides an anti-skinning agent composition comprising 2-pentanone oxime and methyl isobutylone oxime.
[0008] Preferably, in the anti-skinning agent composition, the mass content of 2-pentanone oxime is ≤98%, and the mass content of methyl isobutylone oxime is ≥2%.
[0009] Preferably, in the anti-skinning agent composition, the mass content of 2-pentanone oxime is 85-97.8%, and the mass content of methyl isobutylone oxime is 2.2-15%.
[0010] Preferably, the purity of 2-pentanone oxime is ≥99.5%, and the purity of methyl isobutylone oxime is ≥99.5%.
[0011] The present invention also provides the application of the aforementioned anti-skinning agent composition in coatings.
[0012] Preferably, the coating is an oxidative polymerization type coating.
[0013] Preferably, the anti-skinning agent composition is the main active ingredient of the coating anti-skinning agent.
[0014] The beneficial effects of this invention include:
[0015] The anti-skinning agent composition of the present invention is an anti-skinning agent composition composed of two alkyl oximes. The anti-skinning agent composition prepared by mixing 2-pentanone oxime and methyl isobutylone oxime can replace 2-butanone oxime as an anti-skinning agent, and does not affect the drying balance inside the coating. It is less toxic than 2-butanone oxime, can effectively prevent coating from skinning, and will not disrupt the original drying balance inside the paint. It is environmentally friendly and is a good green and environmentally friendly anti-skinning substance to replace 2-butanone oxime. Detailed Implementation
[0016] The present invention provides an anti-skinning agent composition comprising 2-pentanone oxime and methyl isobutylone oxime.
[0017] In the anti-skinning agent composition of the present invention, the mass content of 2-pentanone oxime is preferably ≤98%, more preferably 85-97.8%, and even more preferably 94-97.5%, and the mass content of methyl isobutylone oxime is preferably ≥2%, more preferably 2.2-15%, and even more preferably 2.5-6%.
[0018] In this invention, the structural formula of 2-pentanone oxime is:
[0019]
[0020] The structural formula of methyl isobutyl ketone oxime is:
[0021]
[0022] In this invention, the purity of 2-pentanone oxime is preferably ≥99.5%, more preferably ≥99.7%, and even more preferably ≥99.8%, and the purity of methyl isobutylone oxime is preferably ≥99.5%, more preferably ≥99.7%, and even more preferably ≥99.8%.
[0023] The present invention also provides the application of the aforementioned anti-skinning agent composition in coatings.
[0024] In this invention, the coating is preferably an oxidative polymerization type coating.
[0025] In this invention, the anti-skinning agent composition is preferably the main active ingredient of a coating anti-skinning agent.
[0026] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.
[0027] In the examples, the purity of 2-pentanone oxime was 99.7%, and the purity of methyl isobutylone oxime was 99.7%; the capped metal paint can container adopted the metal paint can container in GB 6753.3-86 Test Method for Storage Stability of Coatings, with a volume of 0.4L.
[0028] Example 1
[0029] 97.5% by mass of 2-pentanone oxime and 2.5% by mass of methyl isobutylone oxime were stirred at 800 r / min for 10 min to obtain a uniformly mixed anti-skinning agent composition.
[0030] Eight groups of coatings containing anti-skinning agents were obtained by adding different molar amounts of 2-butanone oxime and different molar amounts of anti-skinning agent compositions to the medium-oil alkyd resin SYNOLAC S53W60. According to GB3186-82 "Sampling of Coating Products", 500g of each of the eight groups of coatings containing anti-skinning agents and those without were taken. The molar amounts of 2-butanone oxime and 2-pentanone oxime and methyl isobutylone oxime in the anti-skinning agent compositions are shown in Table 1. The coatings with added 2-butanone oxime, the coatings with added anti-skinning agent compositions, and the coatings without added anti-skinning agents were respectively placed into three standard capped metal paint cans, with the paint samples placed 15mm below the top of the can. After sealing, the cans were placed in a constant temperature drying oven and stored under accelerated conditions at 50±2℃ for 30 days. After 30 days, the containers were opened to check for skin formation, and the results are shown in Table 1.
[0031] Table 1. Skinning status of coatings with different types and amounts of anti-skinning agents added.
[0032]
[0033] Example 2
[0034] 97% by mass of 2-pentanone oxime and 3% by mass of methyl isobutylone oxime were stirred at 800 r / min for 10 min to obtain a uniformly mixed anti-skinning agent composition.
[0035] Eight groups of coatings containing anti-skinning agents were obtained by adding different molar amounts of 2-butanone oxime and different molar amounts of anti-skinning agent compositions to the medium-oil alkyd resin SYNOLAC S53W60. According to GB3186-82 "Sampling of Coating Products", 500g of each of the eight groups of coatings containing anti-skinning agents and alkyd resin coatings without anti-skinning agents were taken. The molar amounts of 2-butanone oxime and 2-pentanone oxime and methyl isobutylone oxime in the anti-skinning agent compositions are shown in Table 2. The coatings with added 2-butanone oxime, the coatings with added anti-skinning agent compositions, and the coatings without added anti-skinning agents were respectively placed into three standard capped metal paint cans, with the paint samples placed 15mm below the top of the can. After tightening the caps, the cans were placed in a constant temperature drying oven and stored under accelerated conditions at 50±2℃ for 30 days. After 30 days, the containers were opened to check for skin formation, and the results are shown in Table 2.
[0036] Table 2. Skinning status of coatings with different types and amounts of anti-skinning agents added.
[0037]
[0038] Example 3
[0039] 96% by mass of 2-pentanone oxime and 4% by mass of methyl isobutylone oxime were stirred at 800 r / min for 10 min to obtain a uniformly mixed anti-skinning agent composition.
[0040] Eight groups of coatings containing anti-skinning agents were obtained by adding different molar amounts of 2-butanone oxime and different molar amounts of anti-skinning agent compositions to the medium-oil alkyd resin SYNOLAC S53W60. According to GB3186-82 "Sampling of Coating Products", 500g of each of the eight groups of coatings containing anti-skinning agents and those without were taken. The molar amounts of 2-butanone oxime and 2-pentanone oxime and methyl isobutylone oxime in the anti-skinning agent compositions are shown in Table 3. The coatings with added 2-butanone oxime, the coatings with added anti-skinning agent compositions, and the coatings without added anti-skinning agents were respectively placed into three standard capped metal paint cans, with the paint samples placed 15mm below the top of the can. After sealing, the cans were placed in a constant temperature drying oven and stored under accelerated conditions at 50±2℃ for 30 days. After 30 days, the containers were opened to check for skin formation, and the results are shown in Table 3.
[0041] Table 3. Skinning status of coatings with different types and amounts of anti-skinning agents added.
[0042]
[0043] Example 4
[0044] 94% by mass of 2-pentanone oxime and 6% by mass of methyl isobutylone oxime were stirred at 800 r / min for 10 min to obtain a uniformly mixed anti-skinning agent composition.
[0045] Eight groups of coatings containing anti-skinning agents were obtained by adding different molar amounts of 2-butanone oxime and different molar amounts of anti-skinning agent compositions to the medium-oil alkyd resin SYNOLAC S53W60. According to GB3186-82 "Sampling of Coating Products", 500g of each of the eight groups of coatings containing anti-skinning agents and alkyd resin coatings without anti-skinning agents were taken. The molar amounts of 2-butanone oxime and 2-pentanone oxime and methyl isobutylone oxime in the anti-skinning agent compositions are shown in Table 4. The coatings with added 2-butanone oxime, the coatings with added anti-skinning agent compositions, and the coatings without added anti-skinning agents were respectively placed into three standard capped metal paint cans, with the paint samples placed 15mm from the top of the can. After tightening the caps, the cans were placed in a constant temperature drying oven and stored under accelerated conditions at 50±2℃ for 30 days. After 30 days, the containers were opened to check for skin formation, and the results are shown in Table 4.
[0046] Table 4. Skinning status of coatings with different types and amounts of anti-skinning agents added.
[0047]
[0048] The above examples and Tables 1-4 demonstrate that the anti-skinning agent composition of the present invention possesses anti-skinning properties as excellent as 2-butanone oxime, and its toxicity is lower than that of 2-butanone oxime, which aligns with the concept of green development. The anti-skinning agent composition of the present invention can replace 2-butanone oxime in coatings.
[0049] 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. An anti-skinning agent composition, characterized in that, The anti-skinning agent composition comprises 2-pentanone oxime and methyl isobutylone oxime.
2. The anti-skinning agent composition according to claim 1, characterized in that, In the anti-skinning agent composition, the mass content of 2-pentanone oxime is ≤98%, and the mass content of methyl isobutylone oxime is ≥2%.
3. The anti-skinning agent composition according to claim 1 or 2, characterized in that, In the anti-skinning agent composition, the mass content of 2-pentanone oxime is 85-97.8%, and the mass content of methyl isobutylone oxime is 2.2-15%.
4. The anti-skinning agent composition according to claim 3, characterized in that, The purity of 2-pentanone oxime is ≥99.5%, and the purity of methyl isobutylone oxime is ≥99.5%.
5. The use of the anti-skinning agent composition according to any one of claims 1 to 4 in coatings.
6. The application according to claim 5, characterized in that, The coating is an oxidative polymerization type coating.
7. The application according to claim 5 or 6, characterized in that, The anti-skinning agent composition is the main active ingredient in anti-skinning agents for coatings.