KR20200088647A - A paint composition using oyster shell - Google Patents

Abstract

The present invention relates to a paint composition comprising water, oyster shell particles, a binder, a pigment, and an additive. More specifically, the present invention relates to a paint composition which can address environmental problems by recycling oyster shells being discarded and can improve spreadability, coatability, shielding ability, handwriting uniformity, heat resistance, and the like. The present invention may provide a paint composition which can address environmental problems through recycling oyster shells being discarded by comprising water, oyster shell particles, a binder, a pigment, and an additive. In addition, the present invention may provide a paint composition which can improve spreadability, coatability, shielding ability, handwriting uniformity, heat resistance, and the like, by using an acrylic polymer as a binder.

Description

Paint composition using oyster shell {A paint composition using oyster shell}

The present invention is water; Oyster shell particles; bookbinder; It relates to a coating composition comprising a pigment and additives, and more specifically, it is possible to solve the environmental problems by recycling the oyster shells that are discarded and can improve the coating properties, coating properties, concealability, handwriting uniformity, heat resistance, etc. It is about.

When the coating film prepared from the coating is exposed to ultraviolet rays or heat for a long time, the polymer chains constituting the coating film are crushed, and the properties of the coating film are deteriorated.

On the other hand, as regulations on the environment have been strengthened, regulations on the release of volatile organic compounds have become strict in the fields of paints, coatings, and adhesives.

Therefore, even if it is exposed to ultraviolet rays or heat for a long time, the properties of the coating film are maintained and the demand for a water-soluble coating material with a low content of volatile organic compounds is rapidly increasing.

However, the water-soluble paint has a disadvantage in that the drying speed is slower than that of the solvent-type paint, so it takes a long time to construct, and the water resistance and abrasion resistance are lowered, which is a fatal disadvantage in terms of reliability.

Meanwhile, a large amount of oyster shells (oyster shells) is generated each year around the southern coast, and some of them are recycled for fertilizer and oyster farming, but most of them are discarded.

The oyster shell is mainly composed of calcium carbonate, and has excellent heat insulation performance and mechanical properties, so it can be used as a paint, building material, industrial material, etc.

In this regard, Korean Patent Publication No. 10-2000-0050019 discloses a paint containing shellfish shells and pigments.

However, the above technique cannot be stably used for a long period of time as a coating material due to lack of coating properties, hiding properties, and heat resistance.

Korean Patent Publication No. 10-2000-0050019

The present invention has been made to solve the above problems, water; Oyster shell particles; bookbinder; It is an object of the present invention to provide a coating composition capable of solving environmental problems by recycling waste oyster shells by including pigments and additives.

In addition, an object of the present invention is to provide a coating composition capable of improving coating properties, coating properties, hiding properties, handwriting uniformity, heat resistance, and the like by using an acrylic polymer as a binder.

In order to achieve the above object, the present invention is water; Oyster shell particles; bookbinder; Provided is a coating composition comprising a pigment and an additive.

In one embodiment of the present invention, the particle size of the oyster shell particles is characterized in that 10 ~ 500㎛m.

In one embodiment of the present invention, the additive is characterized in that it comprises a dispersing agent, a stabilizer, a preservative, a film-forming agent, an antifoaming agent, a film-forming agent and a thickener.

In one embodiment of the present invention, the coating composition is water 10 to 30% by weight, oyster shell particles 25 to 70% by weight, binder 20 to 50% by weight, pigment 1 to 10% by weight, dispersant 0.1 to 1% by weight, stable Characterized in that it contains 0.1 to 1% by weight of the agent, 0.1 to 1% by weight of a preservative, 0.5 to 2% by weight of a film forming agent, 0.1 to 1.5% by weight of an antifoaming agent, 0.1 to 1.5% by weight of a coating agent, and 0.5 to 2% by weight of a thickener .

The present invention also provides a product comprising the coating composition, wherein the product is a coating material, a coating agent, or an adhesive.

The present invention is water; Oyster shell particles; bookbinder; By including the pigment and additives, it is possible to provide a coating composition capable of solving environmental problems by recycling waste oyster shells.

In addition, the present invention can provide a coating composition capable of improving coating properties, coating properties, hiding properties, handwriting uniformity, heat resistance, and the like by using an acrylic polymer as a binder.

In addition, the coating composition of the present invention can be used to prepare a paint, coating agent or adhesive.

Hereinafter, the present invention will be described in detail based on examples. The terms, examples, and the like used in the present invention are merely exemplified in order to explain the present invention in more detail and help a person skilled in the art understand, and the scope of the present invention should not be interpreted as being limited thereto.

Technical terms and scientific terms used in the present invention, unless otherwise defined, refer to meanings commonly understood by those skilled in the art to which this invention belongs.

The present invention is water; Oyster shell particles; bookbinder; It relates to a coating composition comprising a pigment and additives.

The additive may include a dispersing agent, a stabilizer, a preservative, a film forming agent, an antifoaming agent, a coating agent and a thickener.

In addition, the coating composition is 10 to 30% by weight of water, 25 to 70% by weight of oyster shell particles, 20 to 50% by weight of binder, 1 to 10% by weight of pigment, 0.1 to 1% by weight of dispersant, 0.1 to 1% by weight of preservative, preservative It may include 0.1 to 1% by weight, film forming agent 0.5 to 2% by weight, antifoaming agent 0.1 to 1.5% by weight, coating film preparation 0.1 to 1.5% by weight and thickener 0.5 to 2% by weight.

The water is for adjusting the concentration of the composition, the content of water is preferably 10 to 30% by weight. When the content of water is less than 10% by weight, a uniform composition cannot be formed, and workability is lowered, and when the content exceeds 30% by weight, coating properties and hiding properties may be reduced.

The oyster shell particles are prepared by pre-treating the oyster shells and then grinding them.

At this time, the pretreatment is used to remove various impurities attached to the surface of the oyster shell.

To this end, the oyster shell is introduced into the microbial reaction device and then treated with microorganisms to remove impurities, sterilization and heat treatment at 250 to 450°C, or the solution containing microorganisms is sprayed to the oyster shell through the sprayer to remove impurities. Can. Alternatively, all of the above pretreatment methods may be used.

The pre-treated oyster shell is obtained, washed with water, dried, and then pulverized to prepare oyster shell particles.

At this time, the particle size of the oyster shell particles is preferably 10 ~ 500㎛ m, if the particle diameter of less than 10㎛ workability is reduced, when the particle diameter exceeds 500㎛ coating and heat resistance is lowered.

The content of oyster shell particles is preferably 25 to 70% by weight. When the content of the oyster shell particles is less than 25% by weight, coatability and coating properties are deteriorated, and if the content exceeds 70% by weight, workability may be deteriorated.

The binder is intended to improve the bonding strength of the composition, and one or more selected from acrylic polymers and latex polymers may be used.

The acrylic polymer is not particularly limited as long as it has a polymer having an acrylic group in the molecule, and may be produced by polymerizing an acrylic monomer or copolymerizing an acrylic monomer with another monomer.

In addition, it may be used as an acrylic polymer itself, or may be used in the form of an acrylic polymer emulsion.

The acrylic polymer is methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-amyl acrylate, isoamyl acrylate, n-hexyl acrylate, 2 -Ethylhexyl acrylate, hydroxymethylacrylate, 2-hydroxyethylacrylate, hydroxypropylacrylate, laurylacrylate, methylmethacrylate, ethylmethacrylate, propylmethacrylate, isopropylmethacryl Rate, n-butyl methacrylate, isobutyl methacrylate, n-amyl methacrylate, isoamyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, hydroxymethyl methacrylate, It can be prepared by polymerizing hydroxypropyl methacrylate, lauryl methacrylate, acrylic acid, methacrylic acid or mixtures thereof.

The acrylic polymer may include functional groups such as hydroxyl groups and carboxyl groups, and such functional groups may increase the bonding strength of the components constituting the composition to increase the coating properties and heat resistance of the paint.

The latex-based polymer is natural rubber (NR), butadiene rubber (BR), styrene-butadiene rubber (SBR), polychloroprene rubber (CR), acrylonitrile-butadiene rubber (NBR), isoprene rubber (IR), styrene- One or more may be used from acrylonitrile rubber (SAN), acrylonitrile-butadiene-styrene rubber (ABS), ethylene-propylene rubber (EPR) and ethylene-propylene-diene rubber (EPDM).

The latex-based polymer may include functional groups such as hydroxyl groups and carboxyl groups, and these functional groups may improve the bonding strength of components constituting the composition, thereby improving the elasticity, impact resistance, and heat resistance of the paint.

The content of the binder is preferably 20 to 50% by weight. When the content of the binder is less than 20% by weight, coating properties are deteriorated, and when the content exceeds 50% by weight, heat resistance may be deteriorated.

As the binder, an acrylic polymer and a latex polymer can be used at the same time, and the weight ratio of the acrylic polymer and the latex polymer is preferably 60 to 80:20 to 40.

The pigment is used to improve hiding power and water resistance, and silica, alumina, zeolite, barium sulfate, talc, calcium carbonate, carbon black, titanium dioxide, and the like can be used without limitation.

The content of the pigment is preferably 1 to 10% by weight, when the content is less than 1% by weight, the hiding power is reduced, and when the content exceeds 10% by weight, heat resistance may be reduced.

The dispersant is used to improve the dispersion properties of the composition, fatty acid esters of sorbitan, fatty acid esters of polyoxyethylene sorbitan, and the like can be used.

As the fatty acid ester of sorbitan, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, and the like can be used, and as a specific example, there is span 80.

The fatty acid ester of polyoxyethylene sorbitan can be used without limitation, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, and the like. have.

The content of the dispersant is preferably 0.1 to 1% by weight, and if the content is less than 0.1% by weight, dispersibility is lowered, and when the content exceeds 1% by weight, heat resistance may be lowered.

As the dispersant, fatty acid esters of sorbitan and fatty acid esters of polyoxyethylene sorbitan can be used at the same time, and the weight ratio of fatty acid esters of sorbitan and fatty acid esters of polyoxyethylene sorbitan is preferably 60 to 80:20 to 40. Do.

The stabilizer is used to improve weatherability, heat resistance, heat insulation and durability, and phenol antioxidants, alkylated monophenols, alkylthiomethylphenols, hydroquinones, alkylated hydroquinones, hydroxybenzyls, triazines, etc. can be used without limitation. have.

The content of the stabilizer is preferably 0.1 to 1% by weight, and when the content is less than 0.1% by weight, weather resistance, heat resistance and durability are lowered, and when it exceeds 1% by weight, mechanical properties and processability are rather lowered.

The preservative is to impart anti-corrosion and antibacterial properties of the paint, benzoic acid; Sorbic acid; Sodium sulfite; Sodium benzoate; Isothiazolone; Barium metaborate; Tin compounds such as bistributyl tin oxide and dibutyl tin laurate; Halogen compounds such as benzyl bromoacetate and pentachlorophenyl laurate; Phenolic compounds such as dichlorophenol, trichlorophenol, tetrachlorophenol, phenylphenol, chlorocresol and chloroxyrenol; Benzimidazole-based compounds; Triazoline-based compounds; Triazine-based compounds and the like can be used.

The content of the preservative is preferably 0.1 to 1% by weight, and if the content is less than 0.1% by weight, the antimicrobial property decreases, and when it exceeds 1% by weight, the coating property decreases rather.

The film-forming agent may improve the compactness, wettability and adhesion of the coating film, and 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, diethylene glycol monobutyl ether, ethylene glycol monoether, etc. may be used. Can.

The content of the film-forming aid is preferably 0.5 to 2% by weight, and when the content is less than 0.5% by weight, the coating property decreases, and when it exceeds 2% by weight, the heat resistance decreases.

The anti-foaming agent prevents air bubbles from being produced, and mineral oil, turpentine oil, higher fatty acid, higher alcohol, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol dioleate, polyethylene glycol monolininooleate , Polyethylene glycol monostearate, polyoxypropylene oleate butyl ether, and polyoxypropylene stearate butyl ether, and the like.

The content of the anti-foaming agent is preferably 0.1 to 1.5% by weight, and when the content is less than 0.1% by weight, it is impossible to form a uniform coating film due to air bubbles, and when it exceeds 1.5% by weight, heat resistance is deteriorated.

The coating film may be an acrylic polymer, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, or the like.

The content of the coating aid is preferably 0.1 to 1.5% by weight, and when the content is less than 0.1% by weight, it is difficult to form the film early, so drying is delayed and the film is not formed densely, and when it exceeds 1.5% by weight, heat resistance is lowered. .

The thickener serves to increase the viscosity, and hydroxymethylcellulose, hydroxyethylcellulose, hydroxymethylethylcellulose, carboxymethylcellulose, carboxyethylcellulose, cellulose ether, polysaccharide, and the like can be used.

The content of the thickener is preferably 0.5 to 2% by weight, and when the content is less than 0.5% by weight, a uniform coating film cannot be formed, and when it exceeds 2% by weight, heat resistance is lowered.

In addition, the coating composition may further include a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer.

A number of carboxyl groups included in the copolymer may be combined with a binder and oyster shell particles to improve coating properties and mechanical properties.

The acrylate group-containing silane coupling agent includes 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, and 3-methacryloxypropyltri Ethoxysilane, 3-acryloxypropyltrimethoxysilane, methacryloxymethyltriethoxysilane, and methacryloxymethyltrimethoxysilane.

The acrylic acid monomer is acrylic acid, methacrylic acid, methyl acrylic acid, ethyl acrylic acid, butyl acrylic acid, 2-ethyl hexyl acrylic acid, decyl acrylic acid, methyl methacrylic acid, ethyl methacrylic acid, butyl methacrylic acid, 2-ethyl hexyl methacrylic acid , Decyl methacrylic acid, and the like.

The weight ratio of the acrylate group-containing silane coupling agent and the acrylic acid monomer is preferably 10 to 30:70 to 90, and when the weight ratio is less than 10:90, the bonding strength of the composition decreases, and when it exceeds 30:70, mechanical properties decrease. do.

The content of the acrylate group-containing silane coupling agent and the copolymer of the acrylic acid monomer is preferably 1 to 10% by weight, and when the content of the copolymer is less than 1% by weight, the effect of addition is negligible and exceeds 10% by weight. When the heat resistance is lowered.

In addition, the coating composition may further include a copolymer of an unsaturated monomer containing a carboxyl group and an unsaturated monomer containing an epoxy group.

The unsaturated monomer containing a carboxyl group includes a vinyl aromatic monomer containing a carboxyl group; Acrylate-based monomers containing a carboxyl group; Vinyl cyanide-based monomers containing a carboxyl group; Vinyl halide-based monomers including a carboxyl group may be used.

The unsaturated monomer containing the epoxy group is a vinyl aromatic monomer containing an epoxy group; Acrylate-based monomers containing an epoxy group; Vinyl cyanide-based monomers containing an epoxy group; Vinyl halide-based monomers containing an epoxy group and the like can be used.

The weight ratio of the unsaturated monomer containing the carboxyl group and the unsaturated monomer containing the epoxy group is preferably 70 to 90:10 to 30.

The content of the copolymer of the unsaturated monomer containing the carboxyl group and the unsaturated monomer containing the epoxy group is preferably 1 to 10% by weight, when the content of the copolymer is less than 1% by weight, the effect of addition is minimal, 10% by weight If it exceeds, the heat resistance decreases.

In addition, the oyster shell particles may be surface treated with a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer, and the content of the copolymer is preferably 1 to 10 parts by weight based on 100 parts by weight of the oyster shell particles.

In addition, the oyster shell particles may be surface treated with a copolymer of an unsaturated monomer containing a carboxyl group and an unsaturated monomer containing an epoxy group, and the content of the copolymer is preferably 1 to 10 parts by weight based on 100 parts by weight of the oyster shell particles.

In addition, the present invention relates to a paint, coating agent or adhesive comprising the coating composition.

The coating composition may be used to prepare a paint, coating agent or adhesive.

The present invention will be described in detail through the following examples. The following examples are only exemplified for the practice of the present invention, and the contents of the present invention are not limited by the following examples.

(Example 1)

21% by weight of water, 45% by weight of oyster shell particles having a particle diameter of 90㎛, 25% by weight of polymethyl methacrylate, 5% by weight of calcium carbonate, 0.5% by weight of sorbitan monooleate, 0.3% by weight of hydroquinone, 0.2% by weight of dichlorophenol %, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate 1% by weight, polyethylene glycol dilaurate 0.5% by weight, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate 0.5 A coating composition was prepared by mixing weight percent and 1 weight percent of hydroxymethylcellulose.

(Example 2)

A coating composition was prepared in the same manner as in Example 1, except that the content of polymethyl methacrylate was changed.

26% by weight of water, 50% by weight of oyster shell particles having a particle diameter of 90 µm, 15% by weight of polymethyl methacrylate, 5% by weight of calcium carbonate, 0.5% by weight of sorbitan monooleate, 0.3% by weight of hydroquinone, 0.2% by weight of dichlorophenol %, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate 1% by weight, polyethylene glycol dilaurate 0.5% by weight, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate 0.5 A coating composition was prepared by mixing weight percent and 1 weight percent of hydroxymethylcellulose.

(Example 3)

A coating composition was prepared in the same manner as in Example 1, except that the content of polymethyl methacrylate was changed.

11% by weight of water, 25% by weight of oyster shell particles having a particle diameter of 90 µm, 55% by weight of polymethyl methacrylate, 5% by weight of calcium carbonate, 0.5% by weight of sorbitan monooleate, 0.3% by weight of hydroquinone, 0.2% by weight of dichlorophenol %, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate 1% by weight, polyethylene glycol dilaurate 0.5% by weight, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate 0.5 A coating composition was prepared by mixing weight percent and 1 weight percent of hydroxymethylcellulose.

(Example 4)

A coating composition was prepared in the same manner as in Example 1, except that 3% by weight of a copolymer of 3-methacryloxypropyltrimethoxysilane and acrylic acid was added.

3% by weight of a copolymer of 3-methacryloxypropyl trimethoxysilane and acrylic acid, 21% by weight of water, 42% by weight of oyster shell particles having a particle diameter of 90 µm, 25% by weight of polymethyl methacrylate, 5% by weight of calcium carbonate, Sorbitan monooleate 0.5% by weight, hydroquinone 0.3% by weight, dichlorophenol 0.2% by weight, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate 1% by weight, polyethylene glycol dilaurate 0.5% by weight , 2,2,4-trimethyl-1,3-pentanediol diisobutyrate 0.5% by weight and hydroxymethyl cellulose 1% by weight to prepare a coating composition.

(Example 5)

A coating composition was prepared in the same manner as in Example 1, except that 3% by weight of a copolymer of glycidyl methacrylate and acrylic acid was added.

3% by weight of a copolymer of glycidyl methacrylate and acrylic acid, 21% by weight of water, 42% by weight of oyster shell particles having a particle diameter of 90 µm, 25% by weight of polymethyl methacrylate, 5% by weight of calcium carbonate, sorbitan monool Rate 0.5% by weight, 0.3% by weight of hydroquinone, 0.2% by weight of dichlorophenol, 1% by weight of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 0.5% by weight of polyethylene glycol dilaurate, 2,2 ,4-trimethyl-1,3-pentanediol diisobutyrate 0.5% by weight and hydroxymethyl cellulose 1% by weight to prepare a coating composition.

(Example 6)

A coating composition was prepared in the same manner as in Example 1, except that 18% by weight of polymethyl methacrylate and 7% by weight of styrene-acrylonitrile rubber (SAN) were used instead of 25% by weight of polymethyl methacrylate.

(Comparative Example 1)

A coating composition was prepared in the same manner as in Example 1, except that polymethyl methacrylate was not used.

(Coating power and hiding power)

The coating power and hiding power were measured by performing the process of coating the coating composition prepared in Examples and Comparative Examples on a glass substrate, which was marked as excellent, excellent, normal, and poor.

(Heat resistance)

After coating the coating composition prepared in the above Examples and Comparative Examples on a glass substrate, the formed coating film was dipped in an 80°C hot water heater for 1 hour to check the appearance and adhesion, and was marked as excellent, excellent, normal, or poor.

division Example Comparative example One 2 3 4 5 6 One Coating power eminence Great usually eminence eminence eminence Bad Hiding power Great usually Great eminence eminence eminence Bad Heat resistance Great usually usually eminence eminence Great Bad

As can be seen from Table 1, Examples 1 to 6 according to the present invention are excellent in coating power, hiding power and heat resistance of the coating composition, and in particular, Examples 1, 4 to 6 showed the best characteristics.

On the other hand, in the case of Comparative Example 1, the coating power, hiding power, and heat resistance were lower than those of the Example.

Claims (5)

water; Oyster shell particles; bookbinder; Paint composition comprising a pigment and additives.
According to claim 1,
The coating composition, characterized in that the particle size of the oyster shell particles is 10 ~ 500㎛.
According to claim 2,
The additive is a coating composition, characterized in that it comprises a dispersing agent, a stabilizer, a preservative, a film-forming agent, an antifoaming agent, a film-forming agent and a thickener.
According to claim 3,
The coating composition is 10 to 30% by weight of water, 25 to 70% by weight of oyster shell particles, 20 to 50% by weight of binder, 1 to 10% by weight of pigment, 0.1 to 1% by weight of dispersant, 0.1 to 1% by weight of preservative, 0.1 of preservative ~1% by weight, a coating composition characterized in that it comprises 0.5 to 2% by weight of the film forming agent, 0.1 to 1.5% by weight of the antifoaming agent, 0.1 to 1.5% by weight of the coating agent and 0.5 to 2% by weight of the thickener.
In the product comprising the coating composition of claim 1,
The product is a product characterized in that the coating, coating or adhesive.