KR102029743B1 - Aqueous composition for coating a surface and a seat cover for automobile applied the same - Google Patents
Aqueous composition for coating a surface and a seat cover for automobile applied the same Download PDFInfo
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- KR102029743B1 KR102029743B1 KR1020150047429A KR20150047429A KR102029743B1 KR 102029743 B1 KR102029743 B1 KR 102029743B1 KR 1020150047429 A KR1020150047429 A KR 1020150047429A KR 20150047429 A KR20150047429 A KR 20150047429A KR 102029743 B1 KR102029743 B1 KR 102029743B1
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- surface coating
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- coating composition
- isocyanate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
-
- C08J7/047—
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/69—Particle size larger than 1000 nm
Abstract
The present invention includes a subject comprising a carboxyl group-containing first compound having an isocyanate group at the terminal and a carboxyl group-containing second compound having an isocyanate group at the terminal; And a carbodiimide-based curing agent, wherein the first compound provides a composition for surface coating and a vehicle seat to which the first compound has a weight average molecular weight greater than that of the second compound.
Description
The present invention relates to a surface coating composition and an automobile seat to which the same is applied.
In general, vinyl chloride resin (PVC) is a low-cost, heat-resistant, and can take various forms in ductility and rigidity, so that it can be used as a raw material for flooring, medical equipment, wire insulators, interior sheets, signs, or indoor and outdoor decorative sheets. For example, vinyl chloride resin can be used as a raw material for automobile seats.
However, at present, automobiles are emerging as second residential spaces, and since automobile seats occupy the largest portion in the vehicle, consumers' interest in automobile seats that can maintain a high level in the automobile space is increasing. While basic physical properties such as high abrasion resistance and pollution resistance are improved to preserve a clean environment in a vehicle, there is an increasing need for research on automobile seats having improved additional properties such as excellent touch.
In addition, in forming the surface coating layer of the automobile seat, when the organic solvent is used, there is a problem caused by the generation of volatile organic compounds (VOCs) due to the use of the organic solvent.
The present invention provides a subject comprising a carboxyl group-containing first compound having an isocyanate group at the terminal and a carboxyl group-containing second compound having an isocyanate group at the terminal to reduce the occurrence of organic compounds (VOCs); And a carbodiimide-based curing agent, wherein the first compound has a weight average molecular weight greater than that of the second compound.
However, the technical problem to be achieved by the present invention is not limited to the above-mentioned problem, another task that is not mentioned will be clearly understood by those skilled in the art from the following description.
The present invention includes a subject comprising a carboxyl group-containing first compound having an isocyanate group at the terminal and a carboxyl group-containing second compound having an isocyanate group at the terminal; And a carbodiimide-based curing agent, wherein the first compound provides a surface coating composition, characterized in that the weight average molecular weight is larger than the second compound.
The weight average molecular weight of the first compound may be 50,000 to 60,000, and the weight average molecular weight of the second compound may be 30,000 to 40,000.
The first compound may have a higher modulus than the second compound.
The first compound may have a higher viscosity at 25 ° C. than the second compound.
The first compound may have a bimodal particle size distribution including particles having different average particle diameters.
The first compound may be a first prepolymer formed by reacting a polyol compound, a carboxyl group-containing polyol compound, and an isocyanate compound having at least two isocyanate groups at its terminals.
The second compound may be a second prepolymer formed by reacting a polyol compound, a carboxyl group-containing polyol compound, and an isocyanate compound having at least two isocyanate groups at its terminals.
The weight ratio of the first compound and the second compound may be 7: 3 to 4: 1.
The subject may be water dispersed with addition of water.
Based on 100 parts by weight of the total composition for the surface coating, the main body may include 30 parts by weight to 80 parts by weight and 1 to 10 parts by weight of the carbodiimide-based curing agent.
The surface coating composition may form a polymer chain by a three-dimensional crosslinking reaction.
It may further comprise a matting agent having a particle size of 1㎛ to 5㎛.
It may further comprise an additive selected from the group consisting of wetting agents, dispersants, waxes, slip agents, antifoams, anti-soling agents, modifiers, thickeners and combinations thereof.
In one embodiment of the invention, the surface coating layer formed of the surface coating composition; And it provides a car seat comprising a base layer formed under the surface coating layer.
The surface coating layer may be formed by coating the surface coating composition to 1㎛ to 20㎛ dried.
In the surface coating composition according to the present invention, since two or more water-dispersed polyurethane prepolymers having different weight average molecular weights are used as the subject, it is possible to reduce the generation of volatile organic compounds (VOCs) due to the use of organic solvents.
The automotive seat to which the surface coating composition is applied has excellent basic physical properties such as abrasion resistance, stain resistance and light resistance, and also has additional physical properties such as soft touch, low slip index and non-adhesiveness due to low Squeak Index.
1 is a cross-sectional view schematically showing a car seat according to an embodiment of the present invention.
The present inventors have studied the composition for automobile seat surface coating, the subject comprising a carboxyl group-containing first compound having an isocyanate group at the terminal and a carboxyl group-containing second compound having an isocyanate group at the terminal; Carbodiimide-based curing agent, wherein the first compound has a weight average molecular weight greater than the second compound by applying a composition for a surface coating to a car seat, it is confirmed that the physical properties can be improved and the present invention Was completed.
Hereinafter, the present invention will be described in detail.
Surface Coating Composition
The present invention includes a subject comprising a carboxyl group-containing first compound having an isocyanate group at the terminal and a carboxyl group-containing second compound having an isocyanate group at the terminal; It comprises a carbodiimide-based curing agent, the first compound provides a composition for surface coating, characterized in that the weight average molecular weight is larger than the second compound.
First, the surface coating composition includes a carboxyl group-containing first compound having an isocyanate group at the terminal and a carboxyl group-containing second compound having an isocyanate group at the terminal. In this case, the first compound is characterized in that the weight average molecular weight is greater than the second compound, the first compound is characterized in that the viscosity is higher at modulus and 25 ℃ than the second compound.
Specifically, the first compound and the second compound is characterized by having an isocyanate group at the terminal while containing a carboxyl group in the main chain.
More specifically, the weight average molecular weight of the first compound is 50,000 to 60,000, the number average molecular weight is preferably 25,000 to 40,000, but is not limited thereto. At this time, the weight average molecular weight and the number average molecular weight of the first compound have the advantage of excellent wear resistance by maintaining the above range.
In addition, while the weight average molecular weight of the second compound is 30,000 to 40,000, the number average molecular weight is preferably 15,000 to 25,000, but is not limited thereto. In this case, the weight average molecular weight and the number average molecular weight of the second compound are maintained in the above range, there is an advantage to give an emotionally soft feeling according to the low Squeak index.
The first compound may have a higher modulus than the second compound. In this case, the modulus of the first compound is 600Mpa to 700Mpa, the modulus of the second compound is 400 Mpa to 500Mpa, there is an advantage that gives a soft feeling.
In addition, the first compound may have a higher viscosity at 25 ° C. than the second compound. In this case, both the first compound and the second compound may maintain a viscosity of 100 cps to 1,000 cps at 25 ° C., and when the first compound maintains a viscosity of 400 cps to 600 cps at 25 ° C., the second compound may be 100 cps at 25 ° C. To a viscosity of 300 cps.
Specifically, the first compound may have a bimodal particle size distribution including particles having different average particle diameters. The dual particle size distribution refers to a distribution of a state divided into first particles having a relatively small average particle diameter and second particles having a relatively large average particle diameter. As such, since the subject has a dual particle size distribution, the first particles can be positioned between the second particles, thereby achieving a high packing density, and more easily abrasion and fouling resistance effects. Can be implemented.
In this case, the average particle diameter of the first particles having a relatively small average particle diameter is 4 to 10 nm, and the average particle diameter of the second particles having a relatively large average particle diameter is 10 to 20 nm.
The first compound may be a first prepolymer formed by reacting a polyol compound, a carboxyl group-containing polyol compound, and an isocyanate compound having at least two isocyanate groups at its terminals. Due to such a first compound, the automotive seat to which the surface coating composition is applied has excellent additional physical properties such as soft touch.
In this case, the first prepolymer may be formed by reacting 2 equivalents of a polyol compound, 1 equivalent of a carboxyl group-containing polyol compound, and 4 equivalents of an isocyanate compound having at least two isocyanate groups at its terminals.
Specifically, the polyol compound may be a polyester-based polyol, a lactone-based polyol, a polycarbonate-based polyol or a polyether-based polyol, and is most preferably a polycarbonate-based polyol in terms of wear resistance.
The carboxyl group-containing compound may be represented by Formula 1 below:
[Formula 1]
Isocyanate compounds having at least two isocyanate groups at the terminals include toluene diisocyanate, diphenylmethane diisocyanate, modified diphenylmethane diisocyanate, naphthalene diisocyanate, phenylene diisocyanate, hexamethylene diisocyanate, lysine isocyanate, cyclohexane diisocyanate. Isocyanate, isophorone diisocyanate, methylenediphenyl isocyanate, xylene diisocyanate, tetramethylxylene diisocyanate, norbornene diisocyanate, triphenylmethane triisocyanate, polyphenyl polymethylene polyisocyanate, polyisocyanate including carbodiimide groups, allo Polyisocyanate containing a panate group, polyisocyanate containing an isocyanurate group and combinations thereof These may be one or more compounds.
The prepolymer formed by the reaction is called a polyurethane prepolymer and is an anionic prepolymer by a carboxyl group, and water can be easily added and dispersed.
Specifically, the second compound may have a single particle size distribution including particles having substantially the same average particle diameter. In this case, the average particle diameter of the particles having substantially the same average particle diameter is 10 to 20 nm.
In addition, the second compound may be a second prepolymer formed by reacting a polyol compound, a carboxyl group-containing polyol compound, and an isocyanate compound having at least two isocyanate groups at the terminal, similarly to the first compound. As described above, the second compound has a weight average molecular weight lower than that of the first compound, and is characterized by a low viscosity at modulus and 25 ° C.
The weight ratio of the first compound and the second compound is preferably 7: 3 to 4: 1, but is not limited thereto. In this case, when the weight ratio of the first compound and the second compound is less than 7: 3, there is a problem that the wear resistance is insufficient, and when the ratio of the first compound and the second compound exceeds 4: 1, soft touch There is a problem of this deterioration.
In addition, the subject may be dispersed by adding water. Here, water is for forming a urethane aqueous dispersion, and it is preferable to use ultrapure water which is secondary distilled water. By adding water as described above and water dispersion, it is possible to implement a water dispersion polyurethane prepolymer. The water-dispersed polyurethane prepolymer refers to a state in which the polyurethane prepolymer is dispersed in water without being dissolved in an organic solvent. Since water is used as a solvent, it can be safely stored without toxic problems caused by volatile organic solvents. In this case, the prepolymer means a polymer having a relatively low degree of polymerization in which the polymerization reaction is stopped at an intermediate stage in order to facilitate molding.
It is preferable to include 30 parts by weight to 80 parts by weight of the main composition, based on 100 parts by weight of the total surface coating composition, but is not limited thereto. At this time, if the main body is less than 30 parts by weight, there is a problem that the properties are not properly exhibited as the original water-dispersible polyurethane prepolymer, and if the main body exceeds 80 parts by weight, there is a problem that the characteristics due to the remaining components are not properly exhibited.
Next, the surface coating composition includes a carbodiimide-based as a curing agent, the carbodiimide-based curing agent may form a polymer chain by a three-dimensional crosslinking reaction with the subject.
The carbodiimide-based curing agent is for reacting with a carboxyl group in the first compound or the second compound. At this time, the carbodiimide-based curing agent does not react with the hydroxyl group. In the case of the aridine-based curing agent generates a toxic substance, in the case of the melamine curing agent, the melamine curing agents react with each other to lower the reactivity and formaldehyde may come out. In addition, in the case of isocyanate curing agent, there is a problem that the service life is short, and therefore, the reactor is blocked in order to use as a one-part type. However, the blocking requires a lot of heat and high temperature, and thus the efficiency is inferior in the process. .
In the present invention, a carbodiimide-based curing agent is used, and the carbodiimide-based curing agent has a long useful life and does not generate toxic substances, and is effective in terms of workability and environmental aspects.
It is preferable to use the carbodiimide-based curing agent to improve the reactivity by increasing the functionality (functionality). Thereby, a crosslinking density can be made higher than the case of using another kind of hardening | curing agent.
The three-dimensional crosslink means a complete chemical bond such as a covalent bond or an ionic bond between a molecule and the molecule, and the polymer chain may include molecules of a network structure by the three-dimensional crosslinking.
It is preferable to include 1 part by weight to 10 parts by weight of the carbodiimide-based curing agent based on 100 parts by weight of the total surface coating composition, but is not limited thereto. At this time, when each curing agent is less than 1 part by weight, there is a problem that the curing is not made properly, when each curing agent exceeds 10 parts by weight, there is a problem that the unreacted remaining curing agent remains in the composition to cause phase separation.
In addition, the surface coating composition may further include a matting agent having a particle size of 1㎛ to 5㎛. The quencher is a molecule that acts on the luminescent excited molecule to remove the excitation energy and remove the luminescence, by using the particle size of the above range, it is possible to improve the slip properties according to the Squeak Index. In this case, the particle size refers to the average value of each of the long axis diameter and short axis diameter.
Specifically, 0.1 to 10 parts by weight of the matting agent may be included based on 100 parts by weight of the total surface coating composition.
In addition, the surface coating composition may further include an additive selected from the group consisting of a wetting agent, a dispersing agent, a wax, a slipping agent, an antifoaming agent, an anti-soling agent, a modifier, a thickener and a combination thereof.
Specifically, additives selected from the group consisting of wetting agents, dispersants, waxes, slip agents, antifoaming agents, anti-soling agents, modifiers, thickeners, and combinations thereof, based on 100 parts by weight of the total surface coating composition. It may include 0.1 to 20 parts by weight.
Car seat
In addition, the present invention is a surface coating layer formed of the surface coating composition; It provides a car seat comprising a base layer formed on the lower surface coating layer.
1 is a schematic view showing a car seat according to an embodiment of the present invention. Referring to FIG. 1, the
The
The
The
A primer layer (not shown) may be further included between the
Therefore, the surface coating composition according to the present invention used a water-dispersed polyurethane prepolymer as a subject, it is possible to reduce the generation of volatile organic compounds (VOCs) due to the use of organic solvents. The automotive seat to which the surface coating composition is applied has excellent basic physical properties such as abrasion resistance, stain resistance and light resistance, and also has additional physical properties such as soft touch, low slip index and non-adhesiveness due to low Squeak Index.
Hereinafter, preferred examples are provided to aid in understanding the present invention. However, the following examples are merely provided to more easily understand the present invention, and the contents of the present invention are not limited by the following examples.
[ Example ]
Example One
30 parts by weight of the first prepolymer (Bayer UH XP 2648) (weight average molecular weight (Mw) = 55,000) and 10 parts by weight of the second prepolymer (Alberdink U-6150) (weight average molecular weight (Mw) = 35,000), Distributed topics; Carbodiimide-based curing agent (Nisshibo) 4 parts by weight; 3 parts by weight of silica (particle size: 3 μm) as a matting agent; 0.05 part by weight of humectant; 0.05 part by weight as a dispersant; 5 parts by weight of wax; 5 parts by weight of slip agent; 5 parts by weight of anti-soling agent; 0.1 weight part of a thickener was added, and it heated at 120 degreeC, and formed the composition for surface coating.
After applying a urethane-based adhesive resin on top of the artificial leather containing a polyvinyl chloride resin to a thickness of about 5 ~ 10㎛ and dried to form a surface coating layer, an automobile seat was manufactured.
Comparative example One
An automobile seat was manufactured in the same manner as in Example 1, except that the second prepolymer was not used.
Comparative example 2
An automobile seat was manufactured in the same manner as in Example 1, except that an isocyanate-based curing agent (IMPRAFIX® 2794) was used instead of a carbodiimide-based curing agent (Nisshibo).
Comparative example 3
The automobile seat manufactured by A company which is commercially available was purchased.
Experimental Example 1: organic compound ( VOCs Outbreak evaluation
Car seats according to Example 1 and Comparative Examples 1 and 2 were placed in a 3L bag and left at room temperature for 30 minutes after heating at 65 ° C. for 2 hours, and evaluated for the occurrence and extent of the resulting compounds (VOCs).
As shown in Table 1, the composition for surface coating according to Example 1 and Comparative Examples 1 and 2 used a water-dispersible polyurethane prepolymer as a subject, volatile organic compounds (VOCs) due to the use of organic solvents, in particular toluene It was confirmed that the generation can be greatly reduced.
Experimental Example 2: property evaluation
1. Wear resistance evaluation
Automobile seats according to Example 1 and Comparative Examples 1 and 2 were evaluated for wear resistance using a rotary wear tester.
2. Pollution resistance evaluation
Car seats according to Example 1 and Comparative Examples 1 and 2 were mounted on a universal wear tester, and a piece of Cotton Soil Test Cloth was placed on the top of the car seat, and a constant load of 5N was applied thereto. Circulation rate was performed 25 times per minute. The car seat was contaminated with 500 cycles. The contaminated car seat was taken out and divided into grades with the naked eye compared to a standard on a gray scale.
3. Light resistance evaluation
Car seats according to Example 1 and Comparative Examples 1 and 2 were evaluated for light resistance using a BYK gardner micro tri-gloss meter photometer.
4. Soft degree evaluation
The car seats according to Example 1 and Comparative Examples 1 and 2 were directly touched by internal experts by hand to evaluate the relative softness (marked as excellent ○, normal △, insufficient ×).
5. Squeak ( Squeak Index evaluation
Each of the car seats according to Example 1 and Comparative Examples 1 and 2 is fixed on the tread plate, the other is placed in contact with the lower fabric, and then a weight of weight is placed thereon. Then, the horizontally connected string connected to the weight using a pulley is connected to a vertical universal testing machine, and the force deviation in pulling the weight at a constant speed using the universal testing machine (△ F) and average force (Fa) were measured, and the Squeak Index was calculated with ΔF / Fa.
6. Tackiness evaluation
Each of the car seats according to Example 1 and Comparative Examples 1 and 2 was piled up and down, and both fabrics were pressed with a weight of 3N on the other upper side pressing the glass, and left at 80 ° C for 12 hours, and then at 30 ° C at 30 ° C. It was left for minutes to evaluate the non-adhesiveness (marked as good ○, normal △, poor ×).
As shown in Table 2, the car seat to which the composition for surface coating according to Example 1 is applied has the same basic physical properties as the car seat to which the composition for surface coating according to Comparative Examples 1 to 2 is applied, such as abrasion resistance, stain resistance and light resistance. While maintaining, it was confirmed that the additional physical properties such as soft touch, slip properties and non-adhesiveness due to the low Squeak index are particularly excellent.
The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.
Claims (15)
Including a carbodiimide-based curing agent,
The first compound has a weight average molecular weight greater than that of the second compound,
The weight average molecular weight of the first compound is 50,000 to 60,000, the weight average molecular weight of the second compound is 30,000 to 40,000,
The first compound has a bimodal particle size distribution including particles having different average particle diameters,
The weight ratio of the first compound and the second compound is 7: 3 to 4: 1
Surface coating composition.
The first compound is characterized in that the modulus is higher than the second compound
Surface coating composition.
The first compound is characterized in that the viscosity is higher at 25 ℃ than the second compound
Surface coating composition.
The first compound is a first prepolymer formed by reacting a polyol compound, a carboxyl group-containing polyol compound, and an isocyanate compound having at least two isocyanate groups at its terminals.
Surface coating composition.
The second compound is a second prepolymer formed by reacting a polyol compound, a carboxyl group-containing polyol compound, and an isocyanate compound having at least two isocyanate groups at its terminals.
Surface coating composition.
The subject is that water is added and dispersed
Surface coating composition.
Based on 100 parts by weight of the total composition for the surface coating, containing 30 parts by weight to 80 parts by weight of the main body and 1 part by weight to 10 parts by weight of the carbodiimide-based curing agent
Surface coating composition.
The surface coating composition is to form a polymer chain by a three-dimensional crosslinking reaction
Surface coating composition.
Further comprising a matting agent having a particle size of 1 ㎛ to 5 ㎛
Surface coating composition.
Further comprising an additive selected from the group consisting of humectants, dispersants, waxes, slip agents, antifoams, anti-soling agents, modifiers, thickeners and combinations thereof
Surface coating composition.
Comprising a base layer formed on the surface coating layer
Car seat.
The surface coating layer is formed by applying the surface coating composition for 1㎛ to 20㎛ and dried
Car seat.
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| KR1020150047429A KR102029743B1 (en) | 2015-04-03 | 2015-04-03 | Aqueous composition for coating a surface and a seat cover for automobile applied the same |
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| JP2013087228A (en) | 2011-10-19 | 2013-05-13 | Dainichiseika Color & Chem Mfg Co Ltd | Ultraviolet/near-infrared ray shielding aqueous coating material, heat-shielding treatment glass on which coating film formed of the coating material is formed, and method for subjecting window glass to heat-shielding treatment using the coating material |
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| KR20070072282A (en) * | 2005-12-31 | 2007-07-04 | 주식회사 케이씨씨 | A paint composition for repairing a vehicle |
| EP2113527B1 (en) * | 2008-04-28 | 2014-05-21 | Bayer Intellectual Property GmbH | Reformable film with radiation-hardenable coating and form body made of same |
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| JP2013087228A (en) | 2011-10-19 | 2013-05-13 | Dainichiseika Color & Chem Mfg Co Ltd | Ultraviolet/near-infrared ray shielding aqueous coating material, heat-shielding treatment glass on which coating film formed of the coating material is formed, and method for subjecting window glass to heat-shielding treatment using the coating material |
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