Paint additive composition having excellent contamination removal property and contamination removal persistence, and paint composition comprising same

Abstract

The present invention relates to a paint additive composition having excellent contamination removal property and contamination removal persistence, and a paint composition comprising same.

Description

Paint additive composition having excellent contamination removal properties and contamination removal persistence, and paint composition comprising the same

[0001] The present invention relates to a paint additive composition having excellent contamination removal properties and contamination removal durability, and a paint composition comprising the same.

[0002]

[0003] Paints perform a variety of functions, including protection (moisture-proofing, rust-proofing), beautification (gloss, color), and special functions (fireproofing, antibacterial, insulation). Depending on the intended use, paints with various ingredients are applied to ensure the required properties. For example, epoxy paints are used as insulating and rust-proofing paints due to their excellent insulation, heat resistance, chemical resistance, and adhesion. Urethane paints, with their excellent impact resistance, chemical resistance, and flexibility, are used for concrete flooring and soft or rigid foams.

[0004] In addition to the basic paint properties required as mentioned above, paints applied to external products such as automotive paints, wheel paints, and building exterior paints are continuously exposed to contamination, and therefore require contamination resistance in various environments and conditions and the ability to easily remove contamination when it occurs.

[0005] In this way, various technologies are being developed to improve the contamination removal properties of the coating surface. For example, U.S. Patent Publication No. 2006-0185555 discloses a contamination removal paint composition containing fluoroalkylsilane, alkylsilicate, etc., but the process is difficult due to the need for heat treatment at around 100°C and the use of strong acids. On the other hand, International Patent Publication No. 2005-118163 discloses an antifouling paint composition containing polysiloxane, organosilicate, inorganic filler, etc., but since contamination removal properties are only realized through photoinitiation, the problem is that special equipment must be installed. In addition, U.S. Patent No. 11597794 discloses a paint composition having self-cleaning properties including acrylic polyol, free or blocked isocyanate, etc., but has a problem that yellowing may occur.

[0006] Accordingly, there is a need for development of a paint that can be applied to various paints and has excellent contamination removal properties and contamination removal durability.

[0007]

[0008] The present invention provides a paint additive composition having excellent contamination removal properties and contamination removal sustainability, and a paint composition comprising the same.

[0009]

[0010] The present invention provides a paint additive composition comprising a silicone-modified acrylic copolymer and an alkoxy silane, wherein the silicone-modified acrylic copolymer comprises a (meth)acrylate monomer containing silicone, an alkoxy silane-modified (meth)acrylate monomer, and a hydroxy (meth)acrylate monomer.

[0011] In addition, the present invention provides a paint composition comprising the paint additive composition.

[0012]

[0013] The present invention provides a paint additive composition having excellent stain removal properties and stain removal persistence, and a paint composition comprising the same. The paint additive composition of the present invention provides excellent stain removal properties, stain removal persistence, and transparency by using a silicone-modified acrylic copolymer comprising a (meth)acrylate monomer containing silicone, an alkoxy silane-modified (meth)acrylate monomer, and a hydroxy (meth)acrylate monomer, and an alkoxy silane, and is applicable to various paints.

[0014]

[0015] Figure 1 illustrates the criteria for evaluating contamination removal ability using a fountain pen.

[0016]

[0017] The present invention will be described in detail below. However, it is not limited to the following description, and each component may be modified or selectively mixed as needed. Therefore, it should be understood that all modifications, equivalents, and alternatives included within the spirit and technical scope of the present invention are included.

[0018] Functional values ​​such as "acid value" and "hydroxyl value" used herein are measured by conventional methods known in the art, and can be measured, for example, by titration. "Glass transition temperature" is measured by conventional methods known in the art, and can be measured, for example, by differential scanning calorimetry (DSC). "Weight average molecular weight" is measured by conventional methods known in the art, and can be measured, for example, by gel permeation chromatography (GPC).

[0019]

[0020] <Paint additive composition>

[0021] A paint additive composition according to the present invention comprises a silicone-modified acrylic copolymer and an alkoxy silane.

[0022]

[0023] silicone-modified acrylic copolymer

[0024] The silicone-modified acrylic copolymer of the present invention may include a (meth)acrylate monomer containing silicone, an alkoxy silane-modified (meth)acrylate monomer, and a hydroxy (meth)acrylate monomer.

[0025] The (meth)acrylate monomer containing the above silicone can be represented by the following chemical formula 1.

[0026] [Chemical Formula 1]

[0027]

[0028] In the above chemical formula 1,

[0029] R1 is H or CH3,

[0030] R2 is a single bond or an aliphatic, alicyclic or aromatic alkylene group having 1 to 10 carbon atoms,

[0031] R3 is an alkyl group having 1 to 10 carbon atoms,

[0032] n is an integer between 3 and 150.

[0033] For example, in the above chemical formula 1, R1 is CH3, R2 is an aliphatic, alicyclic or aromatic alkylene group having 2 to 6 carbon atoms, R3 is an alkyl group having 2 to 6 carbon atoms, and n can be an integer of 5 to 35.

[0034] The content of the (meth)acrylate monomer including the silicone may be 10 to 60 wt%, for example, 15 to 40 wt%, based on the total weight of the monomer. If the content of the (meth)acrylate monomer including the silicone is less than the above-mentioned range, contamination removal may not be easy, and if it exceeds the above-mentioned range, miscibility may be reduced and craters may occur.

[0035] The above alkoxy silane modified (meth)acrylate monomer serves to increase the curing density.

[0036] The above alkoxy silane modified (meth)acrylate monomer can be represented by the following chemical formula 2.

[0037] [Chemical Formula 2]

[0038]

[0039] In the above chemical formula 2,

[0040] R4 is H or CH3,

[0041] R5 is a single bond or an aliphatic, alicyclic or aromatic alkylene group having 1 to 7 carbon atoms,

[0042] R6, R7 and R8 are each independently an alkyl group having 1 to 5 carbon atoms.

[0043] For example, in the above chemical formula 2, R4 is CH3, R5 is an aliphatic alkylene group having 2 to 3 carbon atoms, and R6, R7 and R8 can each independently be an alkyl group having 1 to 2 carbon atoms.

[0044] The content of the alkoxy silane-modified (meth)acrylate monomer may be 20 to 80 wt%, for example, 40 to 60 wt%, based on the total weight of the monomer. If the content of the alkoxy silane-modified (meth)acrylate monomer is less than the above-mentioned range, the contamination removal ability or the contamination removal sustainability may be reduced, and if it exceeds the above-mentioned range, the contamination removal ability and storage ability may be reduced.

[0045] The above hydroxy (meth)acrylate monomer can be represented by the following chemical formula 3.

[0046] [Chemical Formula 3]

[0047]

[0048] In the above chemical formula 3,

[0049] R9 is H or CH3,

[0050] R10 is an aliphatic or alicyclic alkylene group having 1 to 5 carbon atoms.

[0051] For example, in the above chemical formula 3, R9 may be CH3, and R10 may be an aliphatic alkylene group having 1 to 3 carbon atoms.

[0052] The content of the above hydroxy (meth)acrylate monomer may be 3 to 20 wt%, for example 5 to 15 wt%, based on the total weight of the monomer. If the content of the above hydroxy (meth)acrylate monomer exceeds the above-mentioned range, the contamination removability may be reduced.

[0053] The silicone-modified acrylic copolymer of the present invention may further comprise a radically polymerizable monomer. The radically polymerizable monomer may be an aliphatic, alicyclic, or aromatic hydrocarbon, or a mixture thereof. For example, the aliphatic hydrocarbon may be at least one selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, and butyl (meth)acrylate. For example, the alicyclic hydrocarbon may be at least one selected from the group consisting of cyclohexyl (meth)acrylate and tetrahydrofurfuryl (meth)acrylate. For example, the aromatic hydrocarbon may be at least one selected from the group consisting of styrene, methylstyrene, dimethylstyrene, fluorostyrene, ethoxystyrene, methoxystyrene, phenylene vinyl ketone, vinyl t-butyl benzoate, t-butyl styrene, and benzyl (meth)acrylate.

[0054] The content of the radically polymerizable monomer may be greater than 0 wt% and less than or equal to 67 wt%, for example, 5 to 50 wt%, or in another example, 5 to 15 wt%, based on the total weight of the monomer.

[0055] The content of the silicone-modified acrylic copolymer may be 30 to 70 wt%, for example, 40 to 60 wt%, based on the total solid weight of the paint additive composition. If the content of the silicone-modified acrylic copolymer is less than the above-mentioned range, the contamination removal ability and contamination removal sustainability may be reduced, and if it exceeds the above-mentioned range, the contamination removal ability may be reduced.

[0056]

[0057] alkoxy silane

[0058] The alkoxy silane of the present invention is a component for improving curing density.

[0059] For example, the alkoxy silane may be at least one selected from the group consisting of tetraethoxysilane (TEOS), phenyltrimethoxysilane (PTMS), methyltrimethoxysilane (MTMS), methyltriethoxysilane (MTES), dimethyldimethoxysilane (DMDMS), and dimethyldiethoxysilane (DMDES).

[0060] The content of the alkoxy silane may be 30 to 70 wt%, for example, 40 to 60 wt%, based on the total solid weight of the paint additive composition. If the content of the alkoxy silane is less than the above-mentioned range, the contamination removal ability may be reduced, and if it exceeds the above-mentioned range, the contamination removal ability and contamination removal sustainability may be reduced.

[0061]

[0062] catalyst

[0063] The paint additive composition of the present invention may optionally further include a catalyst depending on the curing conditions.

[0064] The above catalyst is a component for improving the curing speed, and may be, for example, at least one selected from the group consisting of dibutyltin dilaurate, triethyl amine, diethylenetriamine, bismuth carboxylate, and zirconium chelate.

[0065] The content of the catalyst may be 0.01 to 5 wt%, for example 0.1 to 1 wt%, based on the total solid weight of the paint additive composition.

[0066]

[0067] <Paint composition>

[0068] A paint composition according to the present invention comprises a paint and the aforementioned paint additive composition. The paint additive composition can be applied to various paints, and a paint composition applying the paint additive composition can realize excellent transparency as well as excellent contamination removal properties and contamination removal durability.

[0069] For example, the paint may be manufactured by a curing reaction between the subject and the hardener. As another example, the paint may be manufactured by drying and curing the subject.

[0070] The above-mentioned subject matter may include resins commonly used in the paint field, such as acrylic resins, polyester resins, and alkyd resins. The content of the above-mentioned subject matter may be appropriately added within a content range known in the relevant technical field.

[0071] The above curing agent may include a curing agent commonly used in the paint field, and may include, for example, a melamine resin, a polyvalent acid amine resin, an isocyanate resin, etc. The content of the curing agent may be appropriately added within a content range known in the relevant technical field.

[0072] The above paint may further contain additives and solvents commonly used in the relevant technical field.

[0073] Non-limiting examples of the above additives include dispersants, emulsifiers, anti-foaming agents, preservatives, softeners, film-forming agents, antifreeze agents, thickeners, preservatives, leveling agents, etc. The content of the above additives may be appropriately added within a content range known in the relevant technical field.

[0074] The above solvent may include solvents commonly used in the paint industry. The content of the solvent may be appropriately added within a content range known in the relevant technical field.

[0075] Based on the total weight of the paint composition, the content of the paint may be 80 to 99 wt%, for example 90 to 99 wt%, and the content of the paint additive composition may be 1 to 20 wt%, for example 1 to 10 wt%. If the content of the paint additive composition is less than the above-mentioned range, the contamination removal ability and contamination removal sustainability may be reduced, and if it exceeds the above-mentioned range, the transparency and appearance may be reduced.

[0076]

[0077] The present invention will be described in more detail through the following examples. However, the following examples are intended only to aid understanding of the present invention and are not intended to limit the scope of the present invention in any way.

[0078]

[0079] [Synthesis Example 1-6: Synthesis of Silicone-Modified Acrylic Copolymer]

[0080] According to Table 1 below, the raw materials of Part 1 were added under a nitrogen atmosphere to a four-necked flask equipped with a thermometer and a cooler, and the temperature was raised to the reflux temperature. Upon completion of the temperature rise, the raw materials of Part 2 and Part 3 were uniformly added dropwise over 4 hours, respectively, and maintained for 1 hour. Then, the raw materials of Part 4 were added dropwise over 10 minutes and maintained for 2 hours to synthesize a silicone-modified acrylic copolymer.

[0081] In addition, the nonvolatile content (NV) and hydroxyl value (OH value) of the silicone-modified acrylic copolymer manufactured in each synthetic example were measured and shown in Table 1 below.

[0082]

[0083]

[0084] n-BuOH: n-Butanol

[0085] Monomer 1: single end type / Methacrylate-modified silicone fluids (174ASX)

[0086] Monomer 2: 3-Trimethoxysilylpropyl 2-methylprop-2-enoate (KBM-503)

[0087] Monomer 3: 2-Hydroxyethyl 2-methylprop-2-enoate(2-HEMA)

[0088] Monomer 4: Styrene monomer(SM)

[0089] TBPO: tert-butyl peroxide

[0090]

[0091] [Manufacturing Example: Manufacturing of Paint Additive Composition]

[0092] Manufacturing Examples 1-1 to 1-8

[0093] According to Table 2 below, the raw materials were placed in a beaker, stirred thoroughly at a speed of 300 rpm, filled with nitrogen, and packaged to prepare a paint additive composition.

[0094]

[0095]

[0096] TEOS: Tetraethoxysilane

[0097] DBTDL: Dibutyltin dilaurate

[0098]

[0099] Manufacturing Examples 2-1 to 2-8

[0100] According to Table 3 below, the raw materials were placed in a flask and thoroughly stirred at a speed of 300 rpm. Then, the temperature was raised to 140°C, and nitrogen was added in excess to recover the solvent. This process was carried out for 2 hours, and the composition was packaged so as to be filled with nitrogen to prepare a paint additive composition.

[0101]

[0102]

[0103] PTMS: Phenyltrimethoxysilane

[0104]

[0105] Manufacturing Examples 3-1 to 3-8

[0106] According to Table 4 below, the raw materials were placed in a beaker, completely stirred at a speed of 300 rpm, filled with nitrogen, and packaged to prepare a paint additive composition.

[0107]

[0108]

[0109] MTMS: Methyltrimethoxysilane

[0110]

[0111] [Paint manufacturing example]

[0112] Paint manufacturing example 1

[0113] According to Table 5 below, the subject matter and hardener were quantitatively added to a beaker, stirred at 1,000 rpm, and after confirming complete mixing, the additives were added and further stirred. Finally, the solvent was added, stirred, and packaged to manufacture a paint.

[0114]

[0115]

[0116] Resin 1: Acrylic Resin (OHV 90 mgKOH / g, Tg 40 ℃, Mw 4,000 Da, NV 70 wt%)

[0117] Resin 2: Acrylic Resin (OHV 90 mgKOH / g, Tg 25 ℃, Mw 8,500 Da, NV 70 wt%)

[0118] Resin 3: Polyester resin (OHV 200 mgKOH / g, AV 15 mgKOH / g, Tg 20 ℃, Mw 1,200 Da, NV 75 wt%)

[0119] Cymel303 LF: Allex

[0120] Cymel1168: Allex (Highly Alkylated Melamine(Me / isoBu = 1 / 1))

[0121] SETALUX® 91756 VS-60: Alex

[0122] TINUVIN® 1130: BASF

[0123] BYK-358N: BYK Company

[0124] NACURE 5528: King

[0125]

[0126] Paint manufacturing example 2

[0127] According to Table 6 below, the subject and curing agent 1 were quantitatively added to a beaker, stirred at 1,000 rpm, and after confirming complete mixing, the additive was added, followed by additional stirring. Finally, the solvent was added, stirred, and packaged to manufacture PTA. In addition, the curing agent 2 was quantitatively added to a beaker, stirred at 1,000 rpm, and after confirming complete mixing, the solvent was added, stirred, and packaged under nitrogen to manufacture PTB.

[0128]

[0129]

[0130] Resin 4: Polyester resin (OHV 200 mgKOH / g, Tg 5 ℃, Mw 3,000 Da, NV 70 wt%)

[0131] Resin 5: Polyester resin (OHV 100 mgKOH / g, Tg -5 ℃, Mw 5,000 Da, NV 65 wt%)

[0132] Cymel 1156: Allex

[0133] SETAL® 82166 SS-64: Allex

[0134] TINUVIN® 1130: BASF

[0135] BYK-358N: BYK Company

[0136] BYK-354: BYK Company

[0137] Nacure 2107: King company

[0138] DISPERBYK-161: BYK Company

[0139] Desmodur® N3300: Covestro

[0140] Duranate 50M-HDI: Asahi KASEI

[0141] DOWANOL PMA: Dow Chemical Company

[0142]

[0143] Paint manufacturing example 3

[0144] After mixing the raw materials according to Table 7 below, they were uniformly pre-mixed in a mixer for 5 minutes, and the pre-mixed composition was melt-mixed using an extruder (ZSK 25, Werner&Pfeiderer) at 100°C. The melt-mixed resultant was cooled on a cooling roller, then crushed using a hammer mill and filtered to produce a powder coating.

[0145]

[0146]

[0147] Resin 6: Acrylic Resin (Epoxy EEW 550 g / eq, Tg 70 ℃, Mw 7,000 Da, NV 99.8 wt%)

[0148] Resin 7: Acrylic Resin (Epoxy EEW 700 g / eq, Tg 50 ℃, Mw 9,000 Da, NV 99.8 wt%)

[0149] DDDA: Dodecanedioic acid (CATHAY BIOTECH)

[0150] BENZOIN: MIWON Company

[0151] TINUVIN®144: BASF

[0152] TINUVIN®928: BASF

[0153] Resin 8: Acrylic Resin (Tg -60℃, Mw 12,000 Da, NV 99.8 wt%)

[0154]

[0155] Paint manufacturing example 4

[0156] According to Table 8 below, the subject matter was quantitatively added to a beaker, stirred at 1,000 rpm, and after confirming complete mixing, pigments were added, stirred at 2,000 rpm, and after confirming complete mixing, additives and solvents were added, stirred, and packaged to manufacture a paint.

[0157]

[0158]

[0159] Resin 9: Alkyd Resin (OHV 90 mgKOH / g, Mw 100,000 Da, NV 55 wt%)

[0160] Resin 10: Alkyd Resin (OHV 70 mgKOH / g, Mw 80,000 Da, NV 55 wt%)

[0161] Omyacarb® 10-CN: OMYA

[0162] NR960 TITANIUM: NANJING TUTANIUM DIOXIDE CHEMICAL CO., LTD.

[0163] CLAYTONE 40: BYK Company

[0164] DISPERBYK-161: BYK Company

[0165] BYK-325: BYK Company

[0166] BYK-065: BYK Company

[0167] MD-6000N: Jinyang Chemical Co., Ltd.

[0168]

[0169] Paint manufacturing example 5

[0170] According to Table 9 below, the subject matter was quantitatively added to a beaker, stirred at 1,000 rpm, and after confirming complete mixing, pigments were added, stirred at 2,000 rpm, and after confirming complete mixing, additives and solvents were added, stirred, and packaged to manufacture a paint.

[0171]

[0172]

[0173] Resin 11: Acrylic Resin (Tg 60 ℃, Mw 65,000 Da, NV 60 wt%)

[0174] NR960 TITANIUM: NANJING TUTANIUM DIOXIDE CHEMICAL CO., LTD.

[0175] BYK-7411 ES: BYK

[0176] DISPERBYK-161: BYK Company

[0177] NEO-T: Aekyung Chemical Co., Ltd.

[0178] BYK-323: BYK Company

[0179]

[0180] [Experimental Example: Preparation of Paint Composition and Coating Film]

[0181] Experimental examples 1-1 to 1-10

[0182] A paint composition was prepared by quantitatively purchasing the paint and paint additive compositions according to Table 10 below and stirring until completely mixed. The well-mixed paint composition was applied to an untreated aluminum specimen using an air spray gun, and the painted specimen was cured at 140°C for 20 minutes to prepare a coating film.

[0183]

[0184]

[0185]

[0186] Experimental examples 2-1 to 2-10

[0187] According to Table 11 below, the PTA and paint additive composition of Table 6 were quantitatively purchased, stirred until completely mixed, and then mixed with PTB of Table 6 at a ratio of 100:20 until completely mixed to prepare a paint composition. The well-mixed paint composition was applied to an untreated aluminum specimen using an air spray gun, and the painted specimen was cured at 140°C for 20 minutes to prepare a coating film.

[0188]

[0189]

[0190]

[0191] Experimental examples 3-1 to 3-10

[0192] According to Table 12 below, the paint and paint additive compositions were quantitatively charged into a mixer, uniformly pre-mixed for 5 minutes, the mixture was kneaded using an extruder at 100°C, cooled on a cooling roller, and then ground and filtered using a hammer mill to prepare a powder paint composition. The well-mixed paint composition was electrostatically coated onto a non-chromate-treated aluminum specimen, and the coated specimen was cured at 175°C for 15 minutes to prepare a coating film.

[0193]

[0194]

[0195]

[0196] Experimental examples 4-1 to 4-10

[0197] According to Table 13 below, the paint and paint additive compositions were quantitatively purchased and stirred until completely mixed to prepare a paint composition. The well-mixed paint composition was applied to an untreated aluminum specimen using an air spray gun, and the painted specimen was dried at room temperature for one day to prepare a coating film.

[0198]

[0199]

[0200]

[0201] Experimental examples 5-1 to 5-10

[0202] According to Table 14 below, the paint and paint additive compositions were quantitatively purchased and stirred until completely mixed to prepare a paint composition. The well-mixed paint composition was applied to an untreated aluminum specimen using an air spray gun, and the painted specimen was dried at room temperature for one day to prepare a coating film.

[0203]

[0204]

[0205]

[0206] [Physical property evaluation]

[0207] The properties of the coatings manufactured according to each experimental example were measured using the following method, and the results are shown in Tables 15 to 19 below.

[0208]

[0209] 1. Appearance

[0210] The smoothness, craters, and oil content of the coating for each experimental example were visually inspected, and the appearance was evaluated with 5 points (Excellent) for the best case and 0 points (Poor) for the worst case.

[0211]

[0212] 2. Transparency

[0213] The cured film for each experimental example was visually inspected, and transparency was evaluated by giving 5 points (transparent) for the best transparency and 0 points (completely opaque) for the worst transparency.

[0214]

[0215] 3. Contamination removal (oil-based pen)

[0216] After applying an oil-based pen to the film according to each experimental example, the degree to which it could be erased when rubbed with a cloth was visually confirmed, and evaluated from 0 (poor) to 5 (Excellent) using the criteria shown in Figure 1 below.

[0217]

[0218] 4. Contamination removal sustainability

[0219] After applying an oil-based pen to the film according to each experimental example, the number of weeks until the contamination removal ability was equivalent to the initial value was checked under external exposure conditions for 1, 2, 3, 4, and 5 weeks, and the evaluation was made based on the following criteria.

[0220] [metewand]

[0221] 5: Equivalent to initial and contamination removal until week 5

[0222] 4: Equivalent to initial and contamination removal until the 4th week

[0223] 3: Equivalent to initial and contamination removal until the 3rd week

[0224] 2: Equivalent to initial and contamination removal until the 2nd week

[0225] 1: Equivalent to initial and contamination removal until week 1

[0226] 0: No initial contamination removal ability is maintained at all

[0227]

[0228]

[0229]

[0230]

[0231]

[0232]

[0233]

[0234] As shown in Tables 15 to 19 above, the coating films of Experimental Examples 1-1 to 1-9, 2-1 to 2-9, 3-1 to 3-9, 4-1 to 4-9, and 5-1 to 5-9 formed with the paint compositions using the paint additive compositions according to the present invention (Preparation Examples 1-1 to 1-7, 2-1 to 2-7, 3-1 to 3-7) exhibited excellent physical properties across all measured items.

[0235] On the other hand, the coating films of Experimental Examples 1-10, 2-10, 3-10, 4-10, and 5-10 using the paint additive compositions (Preparation Examples 1-8, 2-8, and 3-8) including a silicone-modified acrylic copolymer (Synthesis Example 6) outside the scope of the present invention exhibited inferior physical properties compared to the coating films of Experimental Examples 1-1 to 1-9, 2-1 to 2-9, 3-1 to 3-9, 4-1 to 4-9, and 5-1 to 5-9.

[0236]

[0237] The present invention provides a paint additive composition having excellent contamination removal properties and contamination removal sustainability, and a paint composition comprising the same.

Claims

1. A paint additive composition comprising a silicone-modified acrylic copolymer and an alkoxy silane, The above silicone-modified acrylic copolymer is a paint additive composition having excellent contamination removal properties and contamination removal durability, comprising a (meth)acrylate monomer containing silicone, an alkoxy silane-modified (meth)acrylate monomer, and a hydroxy (meth)acrylate monomer.

2. In paragraph 1, A paint additive composition having excellent contamination removal properties and contamination removal sustainability, wherein the silicone-modified acrylic copolymer comprises, based on the total weight of monomers, 10 to 60 wt% of the (meth)acrylate monomer containing the silicone, 20 to 80 wt% of the alkoxy silane-modified (meth)acrylate monomer, and 3 to 20 wt% of the hydroxy (meth)acrylate monomer.

3. In paragraph 1, The silicone-modified acrylic copolymer is a paint additive composition having excellent contamination removal properties and contamination removal sustainability, which further comprises a radically polymerizable monomer in an amount of more than 0% by weight and less than or equal to 67% by weight based on the total weight of monomers.

4. In paragraph 1, A paint additive composition having excellent contamination removal properties and contamination removal sustainability, comprising 30 to 70 wt% of the silicone-modified acrylic copolymer and 30 to 70 wt% of the alkoxy silane based on the total solid content weight of the paint additive composition.

5. In paragraph 1, The (meth)acrylate monomer containing the above silicone is represented by the following chemical formula 1, The above alkoxy silane modified (meth)acrylate monomer is represented by the following chemical formula 2, The above hydroxy (meth)acrylate monomer is a paint additive composition having excellent contamination removal properties and contamination removal durability represented by the following chemical formula 3: [Chemical Formula 1] In the above chemical formula 1, R1 is H or CH3, R2 is a single bond or an aliphatic, alicyclic or aromatic alkylene group having 1 to 10 carbon atoms, R3 is an alkyl group having 1 to 10 carbon atoms, n is an integer from 3 to 150, [Chemical Formula 2] In the above chemical formula 2, R4 is H or CH3, R5 is a single bond or an aliphatic, alicyclic or aromatic alkylene group having 1 to 7 carbon atoms, R6, R7 and R8 are each independently an alkyl group having 1 to 5 carbon atoms, [Chemical Formula 3] In the above chemical formula 3, R9 is H or CH3, R10 is an aliphatic or alicyclic alkylene group having 1 to 5 carbon atoms.

6. In paragraph 1, A paint additive composition having excellent contamination removal properties and contamination removal sustainability, wherein the alkoxy silane is at least one selected from the group consisting of tetraethoxysilane (TEOS), phenyltrimethoxysilane (PTMS), methyltrimethoxysilane (MTMS), methyltriethoxysilane (MTES), dimethyldimethoxysilane (DMDMS), and dimethyldiethoxysilane (DMDES).

7. A paint composition comprising a paint and paint additive composition, The above paint additive composition is a paint additive composition having excellent contamination removal properties and contamination removal sustainability according to any one of claims 1 to 6, A paint composition comprising 80 to 99 wt% of the paint and 1 to 20 wt% of the paint additive composition, based on the total weight of the paint composition.

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