KR100758201B1 - Solvent borne alkyd paint composition for interior decorative coating - Google Patents

Abstract

The present invention relates to an alkyd oil-based paint composition for use in buildings indoors, and more specifically, to minimize the amount of volatile organic compounds harmful to the human body and the atmospheric environment that the coating film is released during drying after a certain time after painting. It is an object of the present invention to provide an oil-based coating composition capable of delaying the surface drying of the coating film. More specifically, the alkyd oil-based paint of the present invention is characterized by using a rosin-modified ester resin having a weight average molecular weight of 500 to 5,000 as measured by gel permeation chromatography as a surface drying retardant. Surface drying time is delayed at the time of initial coating by adding 1 to 20 parts by weight of the volatile organic compound, but after a certain period of time, the amount of volatile organic compounds in the coating is minimized. It relates to a paint composition.

Indoor, oil paint, alkyd, volatile organic compound, environment friendly

Description

Solvent borne alkyd paint composition for interior decorative coating

The present invention relates to an alkyd oil-based paint composition for use indoors, and more specifically, to minimize the amount of volatile organic compounds harmful to the human body and the atmospheric environment that the coating film is released during drying after a certain time after painting. It relates to a coating composition that can delay the surface drying time of the coating film.

Volatile Organic Compounds are toxic and carcinogenic to the substance itself, such as benzene and 1,3-butadiene, affecting people and the ecosystem, and form aldehydes such as odor, headache, and atopic dermatitis. Cause of the syndrome. As a result, new regulations on indoor air quality management have been established in the world, and domestic regulations on indoor air quality management, such as multi-use facilities, have been applied in Korea, and the total value of total volatile organic compounds in coatings is measured after drying for a certain time. If exceeded, regulations such as penalties and prohibition of use are being tightened.

As a result, the world needs a low-pollution environmentally-friendly paint by replacing volatile organic compounds that are harmful to humans all over the world.The development of environmentally-friendly paints has made it possible to develop water-based paints, powders, and solidification of paints. Development has been progressed through solidification) and low pollution of components.

However, in the case of water-based paints in building paints, physical properties such as smoothness, flowability, anti-foaming properties, water resistance, alkali resistance, etc. are inferior to solvent-type paints, and powdering is difficult to apply to building paints. Although the amount of volatile organic compounds in the paint composition decreases, the overall paint properties decrease due to the decrease in molecular weight.

Japanese Patent Application Laid-Open No. 52-3601 adds a plasticizer to phthalic esters for the purpose of preventing coating cracks caused by coating expansion and contraction due to changes in gloss or turbulence for lacquer car repair paints. There is a problem that affects the ecosystem as an endocrine disruptor.

Attempts to use vinyl or acrylic polymer plasticizers in paints have been proposed in WO 01/83619, Japanese Patent Application Laid-Open No. 2000-178456, and Japanese Patent Application Laid-Open No. 2005-75992, which are compatible with binders applied to alkyd paints in the present invention. There was a disadvantage of poor paintability and causing paint and coating defects.

Similarly, Japanese Patent Application Laid-Open No. 9-176557 uses a polyester plasticizer containing 50 mol% or more of a polyhydric alcohol component in order to obtain a composition having excellent workability without compromising hardness and contamination resistance by mixing it with an acrylic polyol for paint. Although presenting a lot of polyhydric alcohol component has a disadvantage of incompatibility with the binder applied to the alkyd paint in the present invention.

Accordingly, the present inventors have conducted studies to solve the above problems, and as a result, the volatile organic compounds released from the coating film after drying of the general oil paint are mainly due to the air permeability of the solvent remaining inside the coating film due to the surface drying of the initial paint. They found that they were rapidly released for long periods of time, and they continued research to delay surface drying in the early stages of drying. The solution to this problem was to add a low molecular weight rosin modified ester resin with a weight average molecular weight of 500 to 5000. The present invention was found to be complete.

The present invention uses the alkyd oil-based resin as a binder and in the production of a coating composition composed of pigments, solvents and additives, using a rosin modified ester resin having good compatibility with the binder as a surface drying retardant, It is an object of the present invention to provide an oil-based coating composition characterized in that the amount of total volatile organic compound released is significantly reduced when the total amount of volatile organic compound released is measured after drying for a certain period of time after coating.

The present invention for achieving the above object, in the production of a coating composition consisting of a pigment, a solvent, an additive and the like alkyd-based oil resin, by delaying the surface drying time of the initial coating film volatile organic compounds It is characterized by using a surface drying retardant effect that significantly reduces the emission amount of the total volatile organic compounds after the coating film is dried for a certain time, and the surface drying retardant is compatible with the alkyd-based oil resin as a binder It relates to an oil-based paint composition characterized by using this good rosin modified ester resin.

That is, the present invention relates to an alkyd-based oil paint composition using an alkyd-based oil resin, a pigment, a solvent, and a surface drying retardant, and further, if necessary, additives such as a dispersant, a drying agent, an antifoaming agent, a leveling agent, a plasticizer, and a crosslinking agent. Can be used. As the surface drying retardant, a rosin-modified ester resin having a weight average molecular weight of 500 to 5000 is used at 1 to 20% by weight based on the total composition.

The content of each component of the oil paint composition of the present invention is

Alkyd type oil based resin 30 to 70% by weight, pigment 20 to 50% by weight, surface drying retardant 1 to 20% by weight, solvent 1 to 20% by weight, if necessary, dispersant 0.1 to 1% by weight, desiccant 1 to 10% by weight, antifoaming agent 0.1 to 1% by weight, leveling agent 1 to 10% by weight may be used in addition.

That is, the present invention is 30 to 70% by weight alkyd-based oil resin, 0.1 to 1% by weight dispersant, 20 to 50% by weight pigment, 1 to 10% by weight desiccant, 0.1 to 1% by weight defoamer, 1 to 10% by weight leveling agent , 1 to 20% by weight of the surface drying retardant, 1 to 20% by weight of the solvent is preferably used, but is not limited thereto.

Hereinafter, the components used in the oil paint composition of the present invention will be described in more detail.

The oily resin used as a binder (binder) in the coating composition of the present invention is an alkyd-based resin dissolved or dispersed in an organic solvent, the main component of which is obtained by polybasic acid and polyhydric alcohol modified with fatty acid or oil, Or a general alkyd compound in which the content of whey, which is an oil content, is in the range of 30% to 70%, and rosin, styrene, phenol, epoxy, isocyanate compound, ethylenically unsaturated monomer compound capable of radical polymerization, silicone compound, and nitrocellulose as necessary. It is characterized by using it by modifying it. If the resin used as the binder is less than 30% of the whey is less oxidative drying, the water resistance, rust resistance, such as water-resistant coating film properties, and more than 70% has a disadvantage that the color change of the paint easily occurs.

The content of the oil resin in the oil paint composition of the present invention is preferably used 30 to 70% by weight, when using less than 30% by weight is difficult to form a coating film when applying the paint, there is a problem that the adhesion is poor, When it exceeds 70% by weight, there is a problem in that the paintability is poor, which is not preferable.

In the present invention, the pigment may be used as a white pigment and / or extender pigments having a concealing effect, but is not limited thereto. Preferably a white pigment is used, the content is preferably used 20 to 50% by weight in the oil paint composition. When the amount is less than 20% by weight, the hiding power of the coating is low, and when it exceeds 50% by weight, the wettability and the adhesion are poor.

In the present invention, the solvent is aromatic and aliphatic hydrocarbons such as toluene, xylene, methyl ethyl ketone, methyl propyl ketone, methyl butyl ketone, ethyl propyl ketone, methyl isobutyl ketone, ketones such as methyl amyl ketone, and Ester solvents such as methyl acetate, ethyl acetate, normal propyl acetate, isopropyl acetate, isopropyl acetate, butyl acetate, methyl cellosolve acetate, cellosolve acetate, butyl cellosolve acetate, and carbitol acetate, normal propanol, isopropanol And any one or more selected from alcohol solvents such as normal butanol, isobutanol and tert-butanol, ether compounds and glycols, and deodorizing kerosene. The solvent is preferably used in the range of 1 to 20% by weight. In case of using less than 1% by weight, the smoothness of the coating after coating is lowered, and when used in excess of 20% by weight, surface drying is faster, resulting in inferior defoaming property during drying of the coating.

On the other hand, in the present invention, as a surface drying retardant that can minimize the total volatile organic compounds after drying the coating film, it is characterized by using a rosin modified ester resin plasticizer having a weight average molecular weight of 500 ~ 5,000 measured by gel permeation chromatography. .

It is preferable to use the surface drying retardant having a good compatibility with the binder used in the paint to be applied, it is prepared by a polyester reaction mainly composed of rosin, polybasic acid and polyhydric alcohol, fatty acid, oil, phenol as necessary It can be modified with an ethylenic unsaturated monomer compound, a silicone compound, etc. which can be epoxy, radical polymerization.

Rosin of the main component may be one or more selected from the group consisting of gum rosin, tologin, petroleum hydrocarbon resin, but is not limited thereto.

The polybasic acid may be one or more selected from the group consisting of terephthalic acid, isophthalic acid, dimethyl isophthalic acid, phthalic anhydride, methyl tetrahydrophthalic anhydride and maleic anhydride t-butyl isophthalic acid, but is not limited thereto.

The polybasic acid is used 1 part by weight to 50 parts by weight with respect to 100 parts by weight of rosin, when the amount is less than 1 part by weight, the amount of rosin or polyhydric alcohol is relatively increased and the hardness of the resin and glass transition temperature is lowered, the hardness of the coating film A problem occurs that is lowered. On the contrary, when the amount of the polybasic acid exceeds 50 parts by weight, the hardness of the resin and the glass transition temperature are increased to improve the hardness of the coating film. On the contrary, the reactivity of the synthetic resin is poor and the resin is hardened so that the mechanical properties may be reduced.

The polyhydric alcohol is preferably a trivalent or higher polyhydric alcohol, trimethylol ethane, trimethylol propane, glycerin, pentaerythritol and One or a mixture of two or more selected from the group consisting of polyols (tone polyols) which are caprolactone polymerization derivatives may be used.

The polyhydric alcohol is used 10 parts by weight to 100 parts by weight with respect to 100 parts by weight of rosin, when the amount is less than 10 parts by weight of the resin is reactivity of the fast mechanical properties such as leveling of paint, if used in excess of 100 parts by weight Leveling and synthesis stability is improved, but the crosslinking density of the self is lowered, which causes problems such as contamination resistance, chemical resistance, etc. of the coating film coated with the same.

If the molecular weight of the rosin-modified ester resin used as the surface drying retardant in the present invention is less than 500, there is a disadvantage in that the coating properties are lowered, and if the molecular weight exceeds 5,000, the surface drying becomes faster when the paint is dried. There is this.

The compatibility of the binder and the surface drying retardant applied to the oil paint composition of the present invention is selected by the observation of the transparency of the solution and whether the tee generation, the tee formation and viscosity stability during storage, the loss of gloss of the coating film, etc. do. The compatibility between the binder and the surface drying retardant depends on the composition, molecular weight, and the like, but the rosin-modified ester resin having a weight average molecular weight of 500 to 5,000 used as the surface drying retardant in the present invention has excellent compatibility with general alkyd resins. Do.

In the present invention, the surface drying retardant is preferably used in an amount of 1 to 20% by weight based on the total amount of the oil paint composition. When the content is less than 1 part by weight, the surface drying retardation does not delay the total volatile organic content after the coating film is dried. If the amount of the compound cannot be reduced and exceeds 20 parts by weight, it is not preferable because the surface may be left tacky and the coating may be softened to inhibit the coating properties.

In the present invention, the additive may be used by selecting one or more of a dispersant, a desiccant, an antifoaming agent, and a leveling agent. In addition, a plasticizer, a crosslinking agent, etc. may be used as necessary. In this case, the additive may be used without limitation as long as it is conventionally used in oil paint.

Of said additive dispersing agent is an unsaturated polycarboxylic acid and polyamine amide, polycarboxylic acid and of an alkyl ammonium salt-based, can use the alkylol ammonium salt type such as the unsaturated fatty acid, and preferably a poly carboxylic acid and polyamine amide-based dispersant For example, NUOSPERSE 657 manufactured by Elementis Specialty may be used, but is not limited thereto. The dispersant is preferably used in an amount of 0.1 to 1% by weight, and when used in an amount of less than 0.1% by weight, it causes reagglomeration of the pigment. not.

Among the additives, a desiccant may use a metal compound, a fatty acid compound, and the like, and preferably, a metal compound may be used. For example, the mixed drier / MD 1000 of Jinyang Chemical Co., Ltd. may be used, but is not limited thereto. It is preferable to use the content of 1 to 10% by weight, it is difficult to control the drying speed when used less than 1% by weight, and when the content exceeds 10% by weight it may cause discoloration without affecting the drying speed.

Among the additives, the antifoaming agent uses a polysiloxane-based, non-silicone-based polymer, and the like, and preferably, a polysiloxane-based antifoaming agent may be used. For example, BYK-066N, manufactured by BYK Co., Ltd., is not limited thereto. It is preferable to use the content of 0.1 to 1% by weight, the defoaming property is lowered when used in less than 0.1% by weight, there is a disadvantage that the coating film properties when used in excess of 1% by weight.

Among the additives, the leveling agent may be polysiloxane-based, polyacrylate-based, polymethacrylate-based, and the like. Preferably, polysiloxane-based may be used. For example, BYK-320 manufactured by BEI-KEI may be used, but is not limited thereto. . It is preferable to use the content of 1 to 10% by weight, and the use of less than 1% by weight does not affect the smoothness, and when it is used more than 10% by weight, the cratering occurs due to the difference in surface tension with the paint. can do.

The oil paint composition proposed in the present invention is used for the interior coating of buildings, mainly alkyd-based oil-based enamel paint used for the top coat when painting wood or steel or the top coat when coating concrete or concrete, and the volatile organics released after drying. It is characterized by minimizing the amount of compound. In addition, the paint in the present invention can be applied to other interior appliances, furnishings and the like, such as furniture made of wood and steel.

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.

Example 1

Alkyd type oil-based resin used in the coating composition is 50% by weight of solid content, 50% whey, 55% by weight of KC's CRL14539 using toluene as solvent, and polyamine amide of unsaturated polycarboxylic acid as dispersant (elementism 1% by weight of Specialty's NUOSPERSE 657), 25% by weight of rutile titanium dioxide (R-706 from Dupont) as white pigment, 1% by weight of metal compound (Mixed Drier / MD 1000 from Jinyang Chemical) as desiccant, polysiloxane as antifoaming agent (WBY-066N of Biwakei Co., Ltd.) 1 wt%, polyether modified polymethylalkylsiloxane (BYK-320 of Biwakei Co., Ltd.) 5 wt% as a leveling agent, and compatible with CRL14539, an oil-based resin used as a binder as a surface drying retardant Maleic-modified rosin esters (KC's CRF79004, monomer composition weight ratio rosin / maleic anhydride / 95% glycerin = 58.84% / 20.58% / 20.58%, weight average molecular weight 3,000, acid value 20) 10 wt%, deodorant kerosene 2 wt% as solvent After mixing to prepare an oil paint composition, the coating film properties and the amount of volatile organic compound released to evaluate the results are shown in Table 1 below.

Comparative Example 1

Except for the use of the maleic modified rosin ester resin prepared by weight-average molecular weight 300, acid value 190 by stopping the polyester reaction at a high temperature in the CRF79004 formulation of KC as a plasticizer used as the surface drying retardant in Example 1 After applying the same to prepare an oil paint composition, the coating film properties and the amount of volatile organic compounds released are shown in Table 1 below.

Comparative Example 2

In the same manner as in Example 1, but was used as a plasticizer used as a surface drying retardant by extending the polyester reaction at a high temperature in the CRF79004 formulation of KC Co., Ltd. by applying a maleic modified rosin ester resin prepared with a weight average molecular weight of 7000, acid number 9 After the oil paint composition was prepared, the coating film properties and the amount of volatile organic compound released were evaluated and shown in Table 1 below.

Comparative Example 3

The same procedure as in Example 1 was carried out using 40% by weight of oil-based resin, maleic acid modified rosin ester (CSC's CRF79004, weight fraction of the monomer composition gum rosin / maleic anhydride / 95% glycerin = 58.84% / 20.58 % / 20.58%, weight average molecular weight 3,000, acid value 20) was prepared in the same manner as in Example 1, except that 25% by weight, the coating film properties and the amount of volatile organic compounds released are shown in Table 1 below.

[Comparative Example 4]

Except for using a surface drying retardant, 65% by weight of the oil-based resin was prepared in the same manner as in Example 1, and the coating film properties and volatile organic compound emission amount is shown in Table 1 below.

Experimental Example

Using the coating composition prepared in Example 1 and Comparative Examples 1 to 4, the coating film properties and the amount of volatile organic compound released were shown in Table 1 below.

※ Property test

The physical properties of the dried coating film were evaluated as follows.

Total Volatile Organic Compound Emission

The emission test method was dried for 1 day at room temperature and left in the chamber for 3 days, followed by KS M ISO 16000-6 Volatile organic compounds in the room and the chamber air).

<Dry Test of Coating Film>

The drying test evaluated the time taken for the touch and curing drying after coating the coating composition.

-Tack Drying: Adhesive but no paint on finger

-Curing drying: When the arm is perpendicular to the coating surface and twisted at 90 degrees while pressing with your thumb, the coating film does not stretch or wrinkle, and there is no other abnormality.

<Gloss Test of Coating Film>

In the gloss test, 60-degree gloss after 3 days of coating the coating composition was measured with a gloss meter.

TABLE 1

As shown in the table, the coating film formed by using the alkyd-based oil-based paint composition for building interior of Example 1 according to the present invention using the coating composition of Comparative Example 4 did not use a surface drying retardant due to the surface drying retardant It can be seen that the emission amount of the volatile organic compound is significantly reduced than in the case, and when the surface drying retardant is used in excess of 20% by weight as in Comparative Example 3, the emission amount is almost absent but the coating film drying property is poor.

In addition, Comparative Example 1 in which the weight average molecular weight of the rosin-modified ester resin used as the surface drying retardant is 300 and Comparative Example 2 in which the weight average molecular weight is 7000 are shown in Example 1 with the amount of total volatile organic compounds (TVOC) released. It was found to be somewhat higher than that, and accordingly, it was found that it is preferable to use the surface drying retardant in the range of 500 to 5000 weight average molecular weight.

As described above, the coating film formed using the alkyd-based oil-based paint composition for building interior according to the present invention has the effect of significantly reducing the amount of volatile organic compounds released than the conventional coating composition due to the surface drying retardant.

Therefore, it is expected that if the surface drying retardant is properly used in the interior paints of oil-based buildings, the emission of volatile organic compounds harmful to the human body can be minimized.

Claims (5)

Alkyd oil-based resin is used as a binder and consists of pigments, solvents and additives In the oil paint composition, An alkyd-based oil-based coating composition comprising a rosin-modified ester resin having a weight average molecular weight of 500 to 5,000 as a surface drying retardant, in an amount of 1 to 20% by weight based on the total weight of the coating composition. The method of claim 1, The oil paint composition is an alkyd-based oil paint composition, characterized in that 30 to 70% by weight of the alkyd-based oil resin, 20 to 50% by weight pigment, 1 to 20% by weight surface drying retardant, 1 to 20% by weight solvent . The method of claim 2, The oily paint composition is an alkyd-based oil paint composition, characterized in that the addition of 0.1 to 1% by weight, 1 to 10% by weight of the desiccant, 0.1 to 1% by weight of the defoaming agent, 1 to 10% by weight of the leveling agent. The method according to any one of claims 1 to 3, The surface drying retardant is compatible with alkyd-based oily resin, which is a binder, and is an alkyd-based oil-based coating composition, which is prepared by a polyester reaction mainly containing rosin, polybasic acid and polyhydric alcohol. The method according to any one of claims 1 to 3, The alkyd-based oil is an alkyd-based resin obtained by dissolving or dispersing an organic solvent in a polybasic acid and a polyhydric alcohol whose main components are fatty acids or oils, and having an whey content of 30 to 70%. System type oil paint composition.