Anti-fog coating composition

Abstract

The present invention relates to an anti-fog coating composition comprising a hydrophilic polymer A and an anionic surfactant B, the molecular structure of which comprises a hydrocarbon, a sulfonic acid group, and a hydroxyl group. The present invention further relates to an article comprising a substrate and the anti-fog coating composition.

Description

[Technical field]

[0001] It concerns the chemistry of the anti-fog coating composition. [Background technology]

[0002] One of the properties of polymers is that they are transparent or clear, which has led to their use in a variety of applications, such as packaging for items that need to be visible (especially food packaging), agricultural applications (such as greenhouses that use transparent plastics as coverings to control temperature and allow light through), and public health applications (such as transparent surgical masks). However, when using such transparent materials, a problem is that the material surface can become cloudy, reducing the transparency of the material. For this reason, much research has been done to find ways to prevent the clouding of the material surface.

[0003] For example, International Application US2009 / 065703 discloses an anti-fog coating composition comprising a hydrophilic polymer, an anionic surfactant in an amount ranging from 0.5 to 25% by weight based on 100% by weight of the polymer, inorganic oxide particles in an amount ranging from 0 to 60% by weight based on 100% by weight of the polymer, and an aqueous solvent.

[0004] European Patent No. 0600053B1 discloses a polymeric composition that is insoluble in water even upon incubation and exhibits anti-fogging properties, comprising (a) a water-soluble polyvinyl alcohol polymer having an average molecular weight of 20,000 to 200,000 and a water-soluble polyvinylpyrrolidone polymer having an average molecular weight of 30,000 to 400,000, and (b) a crosslinking agent comprising melamine, a mineral acid, or a strong organic acid in an amount of up to 50% by weight based on the weight of the non-volatile components of the composition.

[0005] However, the aforementioned patents do not disclose anti-fog coating compositions such as those of the present invention. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Application No. US2009 / 065703 Brochure [Patent Document 2] European Patent No. 0600053B1 Summary of the Invention

[0007] The present invention relates to an anti-fog coating composition comprising a hydrophilic polymer A and an anionic surfactant B, the molecular structure of which contains a hydrocarbon, a sulfonic acid group, and a hydroxyl group.

[0008] The present invention also relates to an article comprising a substrate and said antifog coating composition.

[0009] The anti-fog coating composition of the present invention has good anti-fog properties, so it is suitable for use on various substrates (such as substrates containing polypropylene, polyethylene terephthalate, or polystyrene as components), and does not make the coated substrate hazy or cloudy, and does not produce an oily film on the substrate surface.Furthermore, the anti-fog coating composition has a long shelf life. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Unless otherwise specified, the term "surfactant" refers to a molecule that contains both a hydrophilic (polar) portion and a hydrophobic (non-polar) portion in the same molecule, which provides the anti-fog coating composition with a low surface tension.

[0011] The term "fog / fogging" refers to water droplets on the surface of a material or substrate that impair visibility through said material or substrate, e.g., reduce visual clarity and decrease light transmittance.

[0012] The phrase "in a range of" includes the starting and ending values, as well as any values ​​between the starting and ending values.

[0013] The present invention discloses an anti-fog coating composition comprising a hydrophilic polymer A and an anionic surfactant B, the molecular structure of which comprises a hydrocarbon, a sulfonic acid group, and a hydroxyl group.

[0014] In one embodiment of the invention, the molecular structure of anionic surfactant B contains 1 to 3 sulfonic acid groups, preferably 1 to 2 sulfonic acid groups, and most preferably 1 sulfonic acid group.

[0015] In one embodiment of the invention, the molecular structure of the anionic surfactant B contains 1 to 3 hydroxyl groups, preferably 1 to 2 hydroxyl groups, most preferably 1 hydroxyl group.

[0016] In one embodiment of the present invention, the sulfonic acid group in the molecular structure of the anionic surfactant B is in the form of a sulfonate salt, which is selected from alkali metal salts (sodium salt, potassium salt, or mixtures thereof), alkaline earth metal salts (magnesium salt), ammonium salts, tertiary amino salts, etc., preferably alkali metal salts, most preferably sodium salt, potassium salt, or mixtures thereof.

[0017] In one embodiment of the invention, the hydrocarbons in the molecular structure of anionic surfactant B contain in the range of 3 to 20, preferably 5 to 20, more preferably 12 to 18, and most preferably 14 to 16 carbon atoms.

[0018] In one embodiment of the invention, the hydrocarbons in the molecular structure of the anionic surfactant B are selected from the group consisting of alkanes, alkenes, alkynes, cycloalkanes, cycloalkenes, aromatic hydrocarbons, and mixtures thereof, preferably alkanes, more preferably linear alkanes.

[0019] In a preferred embodiment of the present invention, the hydrocarbon in the molecular structure of anionic surfactant B is a linear alkane containing in the range of 14 to 16 carbon atoms.

[0020] In one embodiment of the present invention, the anionic surfactant B desirably has a structure as shown in structural formula (I): (chemical 1) R-CH(OH)(CH2) m -(SO3 - X + ) n (I) During the ceremony, R is an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, or mixtures thereof containing in the range of 1 to 19 carbon atoms, preferably 1 to 17, more preferably 8 to 15, and most preferably 11 to 13 carbon atoms; m is 0 to 3, preferably 2 to 3, more preferably 2; n is 1 to 3, preferably 1; X is an alkali metal, an alkaline earth metal, an ammonium group, or a tertiary amine group, preferably an alkali metal, more preferably sodium, potassium, or a mixture thereof, most preferably sodium; Preferably, R is an alkyl containing in the range of 8 to 15, more preferably 11 to 13 carbon atoms, m is 2 to 3, preferably m is 2, n is 1, and X is an alkali metal, preferably sodium or potassium, more preferably sodium.

[0021] More preferably, R is an alkyl containing in the range of 8 to 15, more preferably 11 to 13 carbon atoms, linear; m is 2 to 3, preferably m is 2, n is 1; and X is an alkali metal, preferably sodium or potassium, more preferably sodium.

[0022] In a preferred embodiment of the present invention, the anionic surfactant B is a sodium hydroxyalkanesulfonate, more preferably a hydroxy(C 14 ~C 16 ) sodium alkanesulfonate, most preferably 3-hydroxy(C 14 ~C 16) Sodium alkane-1-sulfonate.

[0023] In one embodiment of the invention, the hydrophilic polymer A is selected from the group consisting of modified cellulose, polyvinylpyrrolidone, polyacrylamide, and polyvinyl alcohol, preferably modified cellulose, more preferably hydroxyalkylmethylcellulose, where alkyl contains in the range of 1 to 5 carbon atoms, and most preferably hydroxypropylmethylcellulose.

[0024] The antifog coating composition of the present invention further comprises an anionic surfactant C, which is preferably an alkene sulfonate anionic surfactant, more preferably an α-olefin sulfonate anionic surfactant.

[0025] In one embodiment of the invention, the anionic surfactant C contains in the range of 3 to 20, preferably 5 to 20, more preferably 12 to 18, and most preferably 14 to 16 carbon atoms.

[0026] In one embodiment of the invention, the carbon of the anionic surfactant C is linear.

[0027] In one embodiment of the present invention, the sulfonic acid group of the alkene sulfonate anionic surfactant or the α-olefin sulfonate anionic surfactant is in the form of a sulfonate salt, the salt being selected from alkali metal salts (sodium salt, potassium salt, or mixtures thereof), alkaline earth metal salts (magnesium salt), ammonium salts, tertiary amine salts, etc., preferably alkali metal salts, most preferably sodium salt, potassium salt, or mixtures thereof.

[0028] In a preferred embodiment of the present invention, the anionic surfactant C is 14 ~C 16 ) sodium alkene sulfonate, more preferably (C 14 ~C 16 ) sodium α-olefin sulfonate, most preferably (C14 ~C 16 ) Sodium alk-2-ene-1-sulfonate.

[0029] The antifog coating composition of the present invention further comprises a solvent, preferably water, more preferably water free of ions and / or impurities.

[0030] In one embodiment of the present invention, the anti-fog coating composition comprises a hydrophilic polymer A, an anionic surfactant B, an anionic surfactant C, and a solvent, where the molecular structure of the anionic surfactant B comprises a hydrocarbon, a sulfonic acid group, and a hydroxyl group, the anionic surfactant C is an alkene sulfonate anionic surfactant, preferably an α-olefin sulfonate anionic surfactant, and the solvent is preferably water.

[0031] In one embodiment of the present invention, the antifog coating composition comprises a hydroxyalkyl methylcellulose, where the alkyl contains in the range of 1 to 5 carbon atoms, and a hydroxy(C 14 ~C 16 ) sodium alkanesulfonate, and (C 14 ~C 16 ) sodium alkene sulfonate (preferably (C 14 ~C 16 ) sodium α-olefin sulfonate) and a solvent, preferably water.

[0032] In one embodiment of the present invention, the antifog coating composition comprises hydroxypropyl methylcellulose and 3-hydroxy(C 14 ~C 16 ) sodium alkane-1-sulfonate, and (C 14 ~C 16 ) sodium alk-2-ene-1-sulfonate and water.

[0033] In one embodiment of the present invention, the weight ratio of all anionic surfactants to hydrophilic polymer A is in the range of 1 to 4.5:1, preferably 1.5 to 3.7:1, more preferably 1.5 to 2.4:1, and most preferably 1.8 to 2.4:1.

[0034] In a preferred embodiment of the present invention, the mass ratio of the anionic surfactant B and the anionic surfactant C to the hydrophilic polymer A is in the range of 1 to 4.5:1, preferably 1.5 to 3.7:1, more preferably 1.5 to 2.4:1, and most preferably 1.8 to 2.4:1.

[0035] In a more preferred embodiment of the present invention, hydroxy (C 14 ~C 16 ) sodium alkanesulfonate and (C 14 ~C 16 The mass ratio of sodium α-olefin sulfonate to hydroxypropyl methylcellulose is in the range of 1 to 4.5:1, preferably 1.5 to 3.7:1, more preferably 1.5 to 2.4:1, and most preferably 1.8 to 2.4:1.

[0036] In a further preferred embodiment of the present invention, 3-hydroxy (C 14 ~C 16 ) Sodium alkane-1-sulfonate and (C 14 ~C 16 The mass ratio of sodium alk-2-ene-1-sulfonate to hydroxypropyl methylcellulose is in the range of 1 to 4.5:1, preferably 1.5 to 3.7:1, more preferably 1.5 to 2.4:1, and most preferably 1.8 to 2.4:1.

[0037] In one embodiment of the present invention, the mass ratio of anionic surfactant B to anionic surfactant C is in the range of 5-50:50-95, preferably 10-40:60-90, more preferably 10-30:70-90, and most preferably 15-25:75-85.

[0038] In one embodiment of the present invention, hydroxy (C 14~C 16 ) sodium alkanesulfonate and (C 14 ~C 16 ) The mass ratio to sodium α-olefin sulfonate is in the range of 5-50:50-95, preferably 10-40:60-90, more preferably 10-30:70-90, and most preferably 15-25:75-85.

[0039] In one embodiment of the present invention, 3-hydroxy (C 14 ~C 16 ) Sodium alkane-1-sulfonate and (C 14 ~C 16 ) The mass ratio of sodium alk-2-ene-1-sulfonate is in the range of 5-50:50-95, preferably 10-40:60-90, more preferably 10-30:70-90, and most preferably 15-25:75-85.

[0040] In one embodiment of the present invention, the mass ratio of the anionic surfactant B to the hydrophilic polymer A is in the range of 0.1-1.0:1, preferably 0.2-0.8:1, more preferably 0.3-0.6:1, and most preferably 0.4-0.5:1.

[0041] In one embodiment of the present invention, hydroxy (C 14 ~C 16 The mass ratio of sodium alkanesulfonate to hydroxypropylmethylcellulose is in the range of 0.1 to 1.0:1, preferably 0.2 to 0.8:1, more preferably 0.3 to 0.6:1, and most preferably 0.4 to 0.5:1.

[0042] In one embodiment of the present invention, 3-hydroxy (C 14 ~C 16 The mass ratio of sodium alkane-1-sulfonate to hydroxypropyl methylcellulose is in the range of 0.1 to 1.0:1, preferably 0.2 to 0.8:1, more preferably 0.3 to 0.6:1, and most preferably 0.4 to 0.5:1.

[0043] In one embodiment of the present invention, the pH of the antifog coating composition ranges from 5 to 10, preferably from 6 to 9.5, and most preferably from 6 to 7.5.

[0044] In one embodiment of the present invention, the anti-fog coating composition is prepared by using a conventional method for preparing an anti-fog coating composition, but is not limited to such a method. For example, the anti-fog coating composition of the present invention is prepared by mixing a predetermined amount of hydrophilic polymer A, anionic surfactant B, anionic surfactant C, and a solvent, and thoroughly stirring the mixture until a uniform solution is obtained.

[0045] The present invention includes those that incorporate at least one of the embodiments of the invention as described above to obtain a good anti-fog coating composition, for example, an anti-fog coating composition that has good anti-fog properties, a long shelf life, and can be applied to a variety of substrates.

[0046] The present invention further discloses an article comprising a substrate and the aforementioned antifog coating composition.

[0047] In one preferred embodiment of the present invention, the article comprises the aforementioned antifog coating composition coated on a substrate.

[0048] In some embodiments of the invention, the article is intended for applications where good transparency, optical properties, or vision properties are required.

[0049] In certain embodiments of the invention, the substrate is a polyolefin (which is polypropylene and polyethylene), polystyrene, polyethylene terephthalate, polyethylene glycol naphthalene dicarboxylate, polybutylene terephthalate, polycarbonate, polyvinyl chloride, polyacrylate, polymethacrylate (which is polymethyl methacrylate), or mixtures thereof.

[0050] In certain embodiments of the invention, the substrate is selected from the group consisting of polypropylene, polyethylene terephthalate, polystyrene, polyethylene, polyvinyl chloride, polyacrylate, and mixtures thereof, preferably polypropylene, polyethylene terephthalate, or polystyrene.

[0051] In certain preferred embodiments of the invention, the article is, for example, a film, a sheet, a block, a mask component, a protective eyewear component, a packaging or grocery packaging component, a barrier component, a helmet visor, an advertising box, a displaying shop window, a vehicle window, a windshield, or a greenhouse component.

[0052] In certain preferred embodiments of the invention, the articles and / or substrates are made by processes such as thermoforming, extrusion, blown film extrusion, blow molding, injection molding, injection blow molding, cast film, calendering, and the like.

[0053] The present invention further comprises: Producing a substrate; preparing the antifog coating composition; coating the anti-fog coating composition on a substrate; Also disclosed are methods of making the articles, including:

[0054] In one embodiment of the present invention, the process of preparing the substrate includes a step of subjecting the substrate surface to a corona treatment to increase the polarity of the substrate surface, thereby improving the adhesion between the substrate and the antifog coating composition used as the coating.

[0055] In some embodiments of the present invention, the coating process is selected from wire rod coating, roll coating, curtain coating, rotogravure coating, spray coating, dip coating, casting, brushing, printing, air knife coating, and other similar coating methods.

[0056] The present invention will be described in detail in the following examples. These examples are presented for the purpose of describing the manner in which the present invention should be carried out and the effects of use, and are not intended to limit the scope of the present invention in this respect, unless otherwise specified in the claims. Any variations or modifications that may be made to the present invention are intended to be within the scope of the present invention. EXAMPLES

[0057] [Substances used] Hydroxy (C 14 ~C 16 ) Sodium alkanesulfonate (C 14 ~C 16 ) Sodium α-olefin sulfonate Polyglyceryl-10-oleate Sodium Lauryl Sulfate C 14 ~C 17 Sodium secondary alkyl sulfonate Sodium Dodecylbenzene Sulfonate Sodium Lauryl Ether Sulfate Hydroxypropyl methylcellulose

[0058] [Examples and Comparative Examples of Anti-Fog Coating Compositions] Anti-fog coating composition examples and comparative examples (Examples 1-8 and Comparative Examples 1-6) are prepared by mixing the components in the ratios shown in Tables 1 and 2 and stirring at 70° C. until a homogenous solution is obtained.

[0059] [Examples and Comparative Examples of Sheets Coated with Anti-Fog Coating Composition] 1. Preparation of Examples of Polypropylene (PP) Sheets Coated with Anti-Fog Coating Compositions and Comparative PP Sheets (PP Sheets 1-8 and Comparative PP Sheets 1-6) Step 1: Corona treat one side of a 0.35 mm thick polypropylene sheet to a surface tension of 40 dynes (surface tension is tested using a dyne test pen). Step 2: Mix the anti-fog coating composition prepared above with ion- and impurity-free water such that the ratio of the anti-fog coating composition to the ion- and impurity-free water is 1:4. Step 3: The surface-treated polypropylene sheet obtained in step 1 is coated with the anti-fog coating composition obtained in step 2 using wire bar coater No. 2 so that the wet thickness of the anti-fog coating composition film is 12 μm (microns). Step 4: The polypropylene sheet coated with the anti-fog composition obtained in step 3 is heated at a temperature of 75 to 80° C. for 15 minutes.

[0060] 2. Production of Examples of Polyethylene Terephthalate (PET) Sheets Coated with Anti-Fog Coating Compositions and Comparative PET Sheet Examples (PET Sheets 1-8 and Comparative PET Sheets 1-6) Step 1: Produce a polyethylene terephthalate sheet with a thickness of 0.37 mm. Step 2: Mix the anti-fog coating composition prepared above with ion- and impurity-free water such that the ratio of anti-fog coating composition to ion- and impurity-free water is 1:4. Step 3: The polyethylene terephthalate sheet obtained in step 1 is coated with the anti-fog coating composition obtained in step 2 using wire bar coater No. 2 so that the wet thickness of the anti-fog coating composition film is 12 μm. Step 4: The polyethylene terephthalate sheet coated with the anti-fog composition obtained in step 3 is heated at a temperature of 60 to 65° C. for 15 minutes.

[0061] [Test method] 1.High temperature anti-fogging test 1.1 Add 50 mL of water to a 250 mL beaker with a diameter of 68 mm and a height of 90 mm, and cover the beaker with a sheet of the example so that the side coated with the anti-fog coating composition faces downwards. 1.2 Place the beaker in a water bath adjusted to 60 ± 1 °C. The water in the water bath and the water in the beaker should be at the same level. 1.3 Observe the changes on the sheet surface and record the time when the water droplets begin to cover the entire test surface.

[0062] 2. Low temperature anti-fogging test 2.1 Add 200 mL of water to a 250 mL beaker with a diameter of 68 mm and a height of 90 mm, and cover the beaker with the sheet of the example so that the side coated with the anti-fog coating composition faces downwards. 2.2 Place the beaker in a temperature controlled chamber at 2±1°C. 2.3 Observe the changes in the sheet surface and record the time when the water droplets begin to cover the entire test surface.

[0063] 3. pH test: using METTLER TOLEDO Seven Compact pH meter

[0064] 4. Haze Test: Using Data Color Spectro 700 Spectrophotometer

[0065] 5. Shelf Life Test 5.1 Place 500 g of the coating composition into a 500 mL cylindrical container and close the lid. 5.2 Store the container from step 5.1 at room temperature. 5.3 Observe the coating composition for changes (color, haze / clarity, precipitation / separation, viscosity, pH, etc.) and record the time when changes occur.

[0066] From Tables 1 and 2, it was found that the anti-fog coating compositions of the present invention (Examples 1 to 8) could be stored for more than 6 months without deterioration or separation. On the other hand, in Comparative Example 5, which contained a surfactant that was a mixture of polyglyceryl-10-oleate and sodium lauryl ether sulfate, separation was observed after only 2 weeks of storage, which is because polyglyceryl-10-oleate is poorly soluble in water and separated during storage.

[0067] From Tables 3 and 4, it was found that the haze values ​​of PP sheets 1 to 8 and PET sheets 1 to 8 were similar to those of PP sheets and PET sheets not coated with an anti-fog coating composition (the haze values ​​of PP sheets and PET sheets not coated with an anti-fog coating composition were 6.2 and 2.3, respectively), that is, the coating composition of the present invention did not fog the PP sheets and PET sheets that are the substrates. On the other hand, the haze values ​​of Comparative PP Sheets 2 to 6 and Comparative PET Sheets 2 to 6 were higher than those of PP sheets and PET sheets not coated with an anti-fog coating composition, that is, the surfactant sodium dodecylbenzenesulfonate (Comparative PP Sheets 2 and 3, Comparative PET Sheets 2 and 3), C 14 ~C 17 Anti-fog coating compositions containing a surfactant that is sodium secondary alkylsulfonate (Comparative PP Sheet 4, Comparative PET Sheet 4), a surfactant that is a mixture of polyglyceryl-10-oleate and sodium lauryl ether sulfate (Comparative PP Sheet 5, Comparative PET Sheet 5), and a surfactant that is sodium lauryl ether sulfate (Comparative PP Sheet 6, Comparative PET Sheet 6) fog the substrates, PP sheets and PET sheets. Furthermore, abnormalities were observed on the surfaces of Comparative PP Sheets 4-5 and Comparative PET Sheets 4-5, i.e., dirt and oil were observed.

[0068] From the test results, it was further confirmed that the coating composition of the present invention (PP sheets 1 to 8) had a higher surface area than the surfactant sodium lauryl sulfate (Comparative PP sheet 1), the surfactant sodium dodecylbenzenesulfonate (Comparative PP sheets 2 and 3), and the surfactant C 14 ~C 17 It was found that the anti-fog effect was better than that of the anti-fog coating composition containing a surfactant that was sodium secondary alkylsulfonate (Comparative PP Sheet 4), a surfactant that was a mixture of polyglyceryl-10-oleate and sodium lauryl ether sulfate (Comparative PP Sheet 5), and a surfactant that was sodium lauryl ether sulfate (Comparative PP Sheet 6).

[0069] The coating composition of the present invention (PP sheets 1 to 8 and PET sheets 1 to 8) exhibits the following properties: C 14 ~C 17 It has a better anti-fog effect than anti-fog coating compositions containing a surfactant that is sodium secondary alkyl sulfonate (Comparative PP Sheet 4 and Comparative PET Sheet 4), a surfactant that is a mixture of polyglyceryl-10-oleate and sodium lauryl ether sulfate (Comparative PP Sheet 5 and Comparative PET Sheet 5), and a surfactant that is sodium lauryl ether sulfate (Comparative PP Sheet 6 and Comparative PET Sheet 6).

[0070] The coating compositions of the present invention (PET sheets 1 to 8) were applied to a substrate of polyethylene terephthalate under low temperature conditions using a surfactant of sodium dodecylbenzenesulfonate (Comparative PET sheets 2 and 3), C 14 ~C 17 It has a better anti-fog effect than anti-fog coating compositions containing a surfactant that is sodium secondary alkyl sulfonate (Comparative PET Sheet 4), a surfactant that is a mixture of polyglyceryl-10-oleate and sodium lauryl ether sulfate (Comparative PET Sheet 5), and a surfactant that is sodium lauryl ether sulfate (Comparative PET Sheet 6).

[0071] Overall, it was found that the coating composition of the present invention has good anti-fog effect on both polypropylene and polyethylene terephthalate substrates under high and low temperature conditions, because the coating composition of the present invention contains hydroxyl groups, which increases the hydrophilicity of the substrate surface and reduces the surface tension of the water droplets that adhere to it, thereby dispersing the water and keeping the sheet transparent, instead of collecting water droplets and fogging the substrate surface.

[0072] [Table 1]

[0073] [Table 2]

[0074] [Table 3]

[0075] [Table 4] [Best embodiment of the present invention]

[0076] The best mode for carrying out the invention is as set forth in the Detailed Description of the Invention.

Claims

1. An anti-fog coating composition comprising a hydrophilic polymer A and an anionic surfactant B, wherein the molecular structure of the anionic surfactant B comprises a hydrocarbon, a sulfonic acid group, and a hydroxyl group.

2. 2. The anti-fog coating composition according to claim 1, wherein the sulfonic acid group in the molecular structure of the anionic surfactant B is in the form of a sulfonate salt, and the salt is selected from alkali metal salts, alkaline earth metal salts, ammonium salts, and tertiary amine salts, preferably alkali metal salts, most preferably sodium salts, potassium salts, or mixtures thereof.

3. 2. The anti-fog coating composition according to claim 1, wherein the hydrocarbon in the molecular structure of the anionic surfactant B contains 3 to 20 carbon atoms, preferably 5 to 20 carbon atoms, more preferably 12 to 18 carbon atoms, and most preferably 14 to 16 carbon atoms.

4. 2. The anti-fog coating composition according to claim 1, wherein the hydrocarbon in the molecular structure of the anionic surfactant B is selected from the group consisting of alkanes, alkenes, alkynes, cycloalkanes, cycloalkenes, aromatic hydrocarbons, and mixtures thereof, preferably alkanes, more preferably linear alkanes.

5. 2. The anti-fog coating composition according to claim 1, wherein the hydrocarbon in the molecular structure of the anionic surfactant B is preferably a linear alkane containing 14 to 16 carbon atoms.

6. The anti-fog coating composition of claim 1, wherein the anionic surfactant B is preferably sodium hydroxyalkanesulfonate, more preferably hydroxy(C １４ ~C １６ ) sodium alkanesulfonate, most preferably 3-hydroxy(C １４ ~C １６ ) an anti-fog coating composition characterized in that the compound is sodium alkane-1-sulfonate.

7. 2. The anti-fog coating composition according to claim 1, wherein the hydrophilic polymer A is selected from the group consisting of modified cellulose, polyvinylpyrrolidone, polyacrylamide, and polyvinyl alcohol, preferably modified cellulose, more preferably hydroxyalkylmethylcellulose, wherein alkyl contains 1 to 5 carbon atoms, and most preferably hydroxypropylmethylcellulose.

8. An anti-fog coating composition according to claim 1, further comprising an anionic surfactant C, wherein the anionic surfactant C is preferably an alkene sulfonate anionic surfactant, preferably an α-olefin sulfonate anionic surfactant.

9. 9. The anti-fog coating composition according to claim 8, wherein the anionic surfactant C contains 3 to 20, preferably 5 to 20, more preferably 12 to 18, and most preferably 14 to 16 carbon atoms.

10. 9. The anti-fog coating composition according to claim 8, wherein the anionic surfactant C is preferably (C １４ ~C １６ ) sodium alkene sulfonate, more preferably (C １４ ~C １６ ) sodium α-olefin sulfonate, most preferably (C １４ ~C １６ ) an anti-fog coating composition comprising sodium alk-2-ene-1-sulfonate.

11. An anti-fog coating composition as described in claim 1, characterized in that the anti-fog coating composition further comprises a solvent, preferably water, more preferably water free from ions and / or impurities.

12. An anti-fog coating composition according to claim 1 or 8, characterized in that the mass ratio of all anionic surfactants to hydrophilic polymer A is in the range of 1 to 4.5:1, preferably 1.5 to 3.7:1, more preferably 1.5 to 2.4:1, and most preferably 1.8 to 2.4:

1.

13. An anti-fog coating composition according to claim 8, characterized in that the mass ratio of anionic surfactant B to anionic surfactant C is in the range of 5-50:50-95, preferably 10-40:60-90, more preferably 10-30:70-90, and most preferably 15-25:75-85.

14. An anti-fog coating composition according to any one of claims 1, 8 or 11, characterized in that the pH is in the range of 5 to 10, preferably 6 to 9.5, and most preferably 6 to 7.

5.

15. 12. An article comprising a substrate and the antifog coating composition of claim 1, 8 or 11.

16. An article comprising a substrate and the anti-fog coating composition of claim 1, 8 or 11 coated on said substrate.

17. 17. The article of claim 16, wherein the substrate is selected from the group consisting of polypropylene, polyethylene terephthalate, polystyrene, polyethylene, polyvinyl chloride, polyacrylate, and mixtures thereof, preferably polypropylene, polyethylene terephthalate, or polystyrene.

18. 17. The article of claim 16, wherein the article is a film, a sheet, a block, a mask component, a safety eyewear component, a packaging or grocery packaging component, a barrier component, a helmet visor, an advertising box, a shop window, a vehicle window, a windshield, or a greenhouse component.

19. 1. A method of manufacturing an article, comprising: The manufacturing method comprises: manufacturing a substrate; Preparing an antifog coating composition according to any one of claims 1, 8 or 11; coating the antifog coating composition of any one of claims 1, 8 or 11 onto the substrate; A method for manufacturing an article, comprising:

20. 20. The method of claim 19, wherein the coating step is selected from wire rod coating, roll coating, curtain coating, rotogravure coating, spray coating, dip coating, casting, brushing, printing, and air knife coating.