KR102124749B1 - Thermosetting acrylic resin for reduction of smell - Google Patents

Abstract

The present invention relates to a thermosetting acrylic resin composition for odor reduction. Particularly, the present invention relates to a thermosetting acrylic resin composition for odor reduction, wherein the composition comprises, based on 100 parts by weight of acrylic resin, 80 parts by weight of calcium carbonate, 2 parts by weight of an anti-settling agent, 0.1 parts by weight of amine, 10 parts by weight of carbon fiber, 1 part by weight of propylene oxide, 15 parts by weight of aromatic copolyester, and 10 parts by weight of polypropylene, and thus can reduce the odor of the acrylic resin.

Description

Odor reduction type thermosetting acrylic resin composition {THERMOSETTING ACRYLIC RESIN FOR REDUCTION OF SMELL}

The present invention relates to a odor (odor) reduction type thermosetting acrylic resin composition.

Specifically, based on 100 parts by weight of acrylic resin, 80 parts by weight of calcium carbonate, 2 parts by weight of anti-settling agent, 0.1 parts by weight of amine, 10 parts by weight of carbon fiber, 1 part by weight of propylene oxide, 15 parts by weight of aromatic copolyester, poly The present invention relates to a odor-reducing thermosetting acrylic resin composition that can reduce the odor of an acrylic resin by containing 10 parts by weight of propylene.

In general, roads are classified into pavement roads and unpaved roads. Pavement roads are roads that are hardly processed by covering stones or sand on the roadside for the purpose of walking or driving and covering them with cement or asphalt. A road means a road that is not.

In the case of pavement, it was often paved with cement or asphalt to maintain its strength, but recently, development has been made using various compositions for the purpose of securing the elasticity of the road and securing water permeability.

On the other hand, in the case of the paint used for the construction of the pavement, it causes a chemical odor.

These odors are odors generated by heating by the heat applied during construction, in addition to the inherent odors of resin, and these odors cause unpleasant sensations of pedestrians as well as pedestrians walking around.

Research to reduce odor has been continued.

As a related technology, Patent Publication No. 10-1169757 describes a thermosetting polymer resin and an ultra-thin layer pavement construction method using the same.

The above technique relates to an ultra-thin layer pavement construction method using a thermosetting polymer resin having early strength development, high strength, high adhesion, and excellent elongation characteristics, and is used as a high pressure washing or high pressure air gun to form a healthy ground surface on a concrete road. A surface cleanup step of removing foreign matter, paint and contaminants; A primer application step of applying a primer using a spray or a roller to the surface of the background surface organized in the rearranging step to cure in a dry state; As a condensation polymer produced by the reaction of polyol, 35 to 70% by weight of polymer resin composed of allophthalic unsaturated polyester, and 5 to 40% by weight of flexible resin composed of isophthalic unsaturated polyester prepared by condensation of polyol and isophthalic acid , 15 to 21% by weight of vinyl toluene, 0.2 to 1% by weight of a co-catalyst consisting of cobalt naphthenate and dimethyl aniline, and a particle size of 30 to 40㎛ 5 to 26% by weight of a filler containing one or more mixtures of silica or silica fume series of 0.1 to 1000 nm, carbon nanofibers having a particle size of 10 to 200 nm, carbon nanotubes, or fibers consisting of mixtures of 0.05 to 0.05 A thermosetting polymer resin application step of applying a thermosetting polymer resin composed of 3% by weight to a thickness of 1.5 to 3.0 mm using a spray gun or a roller; A mixed silica spraying step of spraying the mixed silica having a particle size of 0.05 to 1 mm to a thickness of 3 to 5 mm after applying the thermosetting polymer resin; Curing the thermosetting polymer resin after the mixed silica spraying step, curing at 30 to 50 minutes at room temperature (20°C), and at 60 to 90 minutes at low temperature (below 10°C); After the curing step, a construction completion step of inhaling and cleaning the remaining silica by using an air gun or a vacuum suction device for silica sand not adhered to the background surface by the thermosetting polymer resin; consists of a thermosetting polymer resin having excellent mechanical properties. It prevents deterioration of the cement concrete surface or asphalt concrete due to the construction, and also has an excellent effect in micro-crack reinforcement, and has a low breakage rate after construction. Even if this occurs, all processes are performed through a spray method to provide a thermosetting polymer resin that can obtain a very excellent effect in maintenance and an ultra-thin layer pavement method using the same.

Registered Patent Publication No. 10-1169757 (announced on July 30, 2012)

The object of the present invention, based on 100 parts by weight of acrylic resin, 80 parts by weight of calcium carbonate, 2 parts by weight of anti-settling agent, 0.1 parts by weight of amine, 10 parts by weight of carbon fiber, 1 part by weight of propylene oxide, 15 parts by weight of aromatic copolyester , By providing 10 parts by weight of polypropylene, it is to provide a malodor reduction type thermosetting acrylic resin composition that can reduce the malodor of the acrylic resin.

The odor-reducing thermosetting acrylic resin composition according to the present invention according to the present invention was devised to achieve the above object,

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Based on 100 parts by weight of acrylic resin, 75 to 80 parts by weight of calcium carbonate, 1 to 2 parts by weight of anti-settling agent, 0.05 to 0.1 parts by weight of amine, 5 to 10 parts by weight of carbon fiber, 0.5 to 1 parts by weight of propylene oxide, aromatic copoly It contains 10 to 15 parts by weight of ester and 8 to 10 parts by weight of polypropylene,

In particular, based on 100 parts by weight of acrylic resin, 80 parts by weight of calcium carbonate, 2 parts by weight of anti-settling agent, 0.1 parts by weight of amine, 10 parts by weight of carbon fiber, 1 part by weight of propylene oxide, 15 parts by weight of aromatic copolyester, 10 parts of polypropylene It characterized in that it contains parts by weight.

In addition, the polypropylene is prepared in a liquid phase, it is characterized in that it is prepared by mixing the raw material for producing polypropylene and water-soluble charcoal powder and applying heat.

In addition, the water-soluble charcoal powder is characterized in that 1 to 3 parts by weight based on 100 parts by weight of the raw material for the production of polypropylene.

In addition, the odor reduction type thermosetting acrylic resin composition,

The acrylic resin was first stirred for 15-20 minutes through a stirrer,

Next, the anti-settling agent is introduced to stir so that the anti-settling agent can be uniformly stirred on the acrylic resin.

It is characterized in that calcium carbonate, carbon fiber, propylene oxide, aromatic copolyester, and polypropylene are added and stirred one by one.

According to the malodor reduction type thermosetting acrylic resin composition according to the present invention,

Based on 100 parts by weight of acrylic resin, 80 parts by weight of calcium carbonate, 2 parts by weight of anti-settling agent, 0.1 parts by weight of amine, 10 parts by weight of carbon fiber, 1 part by weight of propylene oxide, 15 parts by weight of aromatic copolyester, 10 parts by weight of polypropylene By including, it is possible to reduce the odor of the acrylic resin.

Therefore, it is possible to reduce the discomfort of the worker or surrounding pedestrians and residents.

The terms or words used in the present specification and claims should not be construed as being limited to ordinary or lexical meanings, and the inventor can appropriately define the concept of terms in order to describe his or her invention in the best way. Based on the principles, it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

Therefore, the examples shown in the embodiments and the drawings described herein are only the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, and thus various equivalents can be substituted at the time of application. It should be understood that there may be water and variations.

Hereinafter, prior to the description with reference to the drawings, not necessary for revealing the gist of the present invention, that is, a well-known configuration that can be added by those skilled in the art will not be shown or not specifically described Well, reveal the notes.

The present invention relates to a malodor reduction type thermosetting acrylic resin composition.

According to one embodiment, the malodor reduction type thermosetting acrylic resin composition of the present invention is based on 100 parts by weight of acrylic resin, 75 to 80 parts by weight of calcium carbonate, 1 to 2 parts by weight of anti-settling agent, 0.05 to 0.1 parts by weight of amine, It contains 5 to 10 parts by weight of carbon fiber, 0.5 to 1 part by weight of propylene oxide, 10 to 15 parts by weight of aromatic copolyester, and 8 to 10 parts by weight of polypropylene as a composition.

In addition, preferably, the composition of the odor-reducing thermosetting acrylic resin composition of the present invention, based on 100 parts by weight of acrylic resin, 80 parts by weight of calcium carbonate, 2 parts by weight of anti-settling agent, 0.1 parts by weight of amine, 10 parts by weight of carbon fiber, propylene It may include 1 part by weight of oxide, 15 parts by weight of aromatic copolyester, 10 parts by weight of polypropylene.

Acrylic resin is a synthetic resin containing MMA monomer (Methyl methacrylate monomer) as a main raw material, and is also called PMMA (Poly methyl methacrylate) resin. These acrylic resins are excellent in weather resistance, scratch resistance, and colorability, and are widely used as parts materials for automobiles, optical products, electrical and electronic equipment, and are commonly used as tacrylic resins.

When such an acrylic resin is used for thermal decomposition, it can be easily recovered as a monomer with a yield of almost 100%, and its value is recognized in the environment as a polymer. It has excellent physical properties such as durability, heat resistance, chemical resistance, abrasion resistance, and UV safety, and has excellent weather resistance, which is weather- and weather-resistant properties such as sunlight, so it suppresses corrosion caused by changes in the external environment such as weather and climate changes, and at the same time as a package. It is used to improve adhesion strength and toughness by infiltrating and integrating, and to improve coloration by pigments.

Since the acrylic resin has a wide temperature range for construction from -30 to 25°C, and the curing time can be used after about 1 hour after construction, the odor-reducing thermally-setting acrylic resin according to the present invention is used as a coating material for road pavement. When used, the curing time is short enough to allow the use of a toho relatively, compared to epoxy or urethane, which is a conventional coating material.

However, the acrylic resin has a pungent odor that may give pleasure or may be accompanied by dizziness. This causes inconvenience to workers or pedestrians during painting, and the road is heated in the summer even after construction, causing odor and causing complaints. It also becomes.

Since the acrylic resin is composed of 70% volatile matter and 30% nonvolatile matter, the solid content is 30%. The molecular weight of the conventional PMMA resin is 7,000 to 10,000, and has a viscosity of 100 CPS to 300 CPS. This is to improve the uniformity and dispersion degree as a solvent and to improve the sprayability when spraying onto the road. However, due to the high volatile content, evaporation of volatile organic compounds (VOCs) is easy and the odor is not only severe, but in some cases, photochemical reactions are generated, resulting in photochemical oxidizing substances such as ozone, causing headaches and dizziness.

In the present invention, the acrylic resin has a solid content of 40-50% by weight, so that the content ratio of nonvolatile matter to volatile matter is 6:4 to 5:5, so that the content of volatile matter relative to conventional acrylic resin is relatively low.

According to the direct sensory method, the odor labeling method displays the odor level from 0 to 5, the odor threshold is the minimum level of odor, 1 degree, the normal level that is not perceived as odor is 2 degrees, and the intensity of the odor can be felt. 3~5 degrees. The PMMA resin used in the present invention has a odor intensity lower than 3 due to a low volatile content, thereby significantly reducing the rejection reaction against odor.

In general, viscosity tends to increase with increasing molecular weight at the same concentration. Since the conventional acrylic resin has a molecular weight of 7000 to 10,000, if the concentration, that is, the solid content is increased to 40-50% by weight, the viscosity becomes too high, which is difficult to use as a solvent.

To overcome this problem, the acrylic resin used in the present invention is an acrylic polyol obtained through polymerization reaction of MMA monomer (Bethyl methacrylate monomer) and BMA monomer (Acryl polyol), and the molecular weight is adjusted to 800 to 1,200. By doing so, it is possible to maintain the viscosity of 100 CPS to 300 CPS in spite of reducing the volatile component and increasing the solid content to reduce odor.

Therefore, compared to a conventional acrylic resin, the solid content is high, so that the odor is reduced, while the viscosity is maintained without a significant change, so that the composition does not suffer from a decrease in uniformity, dispersion, or dispersion during spraying.

Calcium carbonate (CaCO ₃ ) is an ultra-fine powder made by crushing limestone, and is stable and stable at room temperature. It is used as a neutralizing agent for cement, raw materials for calcium oxide, raw materials for calcium oxide, and iron and building materials. When used as a road pavement, it improves the mechanical properties of the pavement formed after the pavement is applied and cured to increase the durability and strength of the pavement, thereby preventing aging and functioning to keep the road markings for a long time.

The anti-settling agent prevents precipitation and sedimentation of high specific gravity pigments, silica sand, thermoplastic rubber, etc., to make the composition uniform and to impart viscosity. Polyethylene-based powders, polyethylene-based waxes, and higher fatty acid amides are commonly used.

Such anti-settling agent, when the composition according to the present invention is mixed, so that the insoluble component contained in each composition remains to prevent sedimentation during mixing, thereby preventing the mixing of the composition from being uniform do.

The amine is used as a curing agent or curing accelerator, and aromatic amines, aliphatic amines, and aromatic tertiary amines are commonly used. These amines serve to help heat-cure the malodor-reducing thermosetting acrylic resin composition according to the present invention.

Carbon fiber is a fiber made by heating and carbonizing an organic fiber in an inert gas. In general, a hexagonal ring of carbon is formed in succession to form a layered lattice. It has a metallic luster and has a black or gray color.

Cellulose, acrylic fiber, vinylon, pitch, rayon, etc. are used as the carbon fiber, and the molecular arrangement and crystal change occur depending on the raw material or the treatment temperature. In the present invention, the carbon fiber is selected from the group consisting of polyacrylonitrile (PAN) fibers, pitch fibers, rayon fibers, and cellulose fibers, and is not limited thereto.

These carbon fibers have excellent impact resistance, are resistant to chemicals, and have high resistance to pests. It is lighter than aluminum because the molecules such as oxygen, hydrogen, and nitrogen escape during the heating process, and the weight is reduced. On the other hand, it has superior elasticity and strength compared to iron.

Propylene oxide (Propylene oxide, Propylenoxyd) is a cyclic ether mixed with water, and is also used as a sterilizing agent in food processing, and serves to reduce the curing shrinkage rate when the acrylic resin according to the present invention is thermoset.

Copolyester means a fiber made of eco-friendly materials, unlike polyester. These copolyesters make use of aromatic copolyesters, and serve to reduce the odor (smell) of the composition.

Polypropylene is a thermoplastic resin, which is conventionally described as PP or polypropylene. The polypropylene is used to improve the strength of the heat-cured article using the acrylic resin according to the present invention.

These polypropylenes can be obtained in liquid form using conventional molding techniques and mixed with the rest of the compositions of the present invention.

However, since polypropylene has a predetermined odor, the odor is expressed in the surrounding environment or when performing processing, molding, painting, etc., so as to remove the odor, raw materials and water-soluble charcoal are used. To be obtained by firing with heat.

Preferably, water-soluble charcoal is prepared by coating water-soluble charcoal between two raw materials (plastic resin, etc.) as a powder, and a polypropylene in a liquid form mixed with water-soluble charcoal is prepared by firing.

At this time, the two raw materials are prepared in a ratio of 1:1, and the amount of 1 to 3 parts by weight of water-soluble charcoal as a powder based on 100 parts by weight of these raw materials is applied between the two raw materials. At this time, the meaning of coating employs the technique of ordinary powder application.

The water-soluble charcoal serves to remove the odor of polypropylene.

At this time, when the water-soluble charcoal was contained in an amount of less than 1 part by weight, there was no effect on odor removal, and when it exceeded 3 parts by weight, a color change due to the addition of charcoal occurred too severely.

According to one embodiment, among the raw materials in the solid state, while applying heat by using a mold having a predetermined shape on one surface of the raw material located on the lower side, a groove to receive water-soluble charcoal powder can be formed on the upper surface of the raw material. have. That is, the groove is formed to correspond to the shape of the mold. At this time, heat may be applied to a mold or a hot press.

The shape of the mold may include a body portion having a predetermined shape such as a circular shape or a square shape, and a wing portion having a straight or curved shape in all directions and a radially curved shape.

At this time, the expression four directions does not mean four directions, but refers to a plurality of directions. For example, the shape of a spider can be expected.

Using a mold having such a shape, a groove according to the shape is formed in the mold on the upper surface of the solid raw material located on the lower side, and the water-soluble charcoal powder is accommodated in the groove to put the solid raw material on the upper side and heat-fired. To obtain polypropylene.

The odor-reducing thermosetting acrylic resin composition according to the present invention made of such a composition is mixed by stirring each composition through a stirring step → an inspection step → a packaging step, and after performing the quality inspection of the obtained acrylic resin, through packaging It can be released as a product.

In the stirring step, the acrylic resin is first introduced to perform stirring, and then the remaining compositions are sequentially mixed one by one.

At this time, the first agitation using an acrylic resin is carried out using a conventional stirrer for about 15 to 20 minutes. The reason for first stirring the acrylic resin is that the acrylic resin serves as a solvent and a binder.

However, the composition to be added next to the acrylic resin may be an anti-settling agent. This is to allow the composition to be stirred after being stirred to be uniformly agitated, so that the anti-settling agent is mixed with the acrylic resin to be uniformly dispersed.

After the composition, depending on the properties of each composition, it may take a long time to stir, or may preferentially input a composition that must be performed precisely by lowering the speed of agitation, but this is only based on the know-how and knowledge of a person skilled in the art. , It is not particularly limited. That is, the time required for each agitation may also be based on the expertise or know-how of a skilled person. This is also true of anti-settling agents.

In the inspection step, inspection items such as color, viscosity, and drying time of the final mixture are finally checked. If the standard indicator set value is not satisfied, it is classified as a defective product and discarded.

In the packaging stage, 5kg, 10kg, 15kg, 20kg, 30kg, etc. are packaged in subdivisions, and the standard name is a non-slip packaging material, manufacturer name or its abbreviation, date of manufacture or lot number, mass or volume, usage and use The amount of time, amount of product used (mixing ratio), etc. is marked on the outer surface of the packaging or container, and precautions for distribution and storage, and the country of origin are also indicated.

Experimental Example 1. Odor (odor) removal evaluation

The odor removal was evaluated using the odor-reducing type heat-setting acrylic resin according to the present invention described above. The odor test assumes that the present invention is used as a paint on the road as an embodiment, and measures the odor generated during work by applying and heating the asphalt road specimen to a thickness of 3 mm, respectively.

Odor measurement was performed using an OMX-SR (Ecomac) measuring instrument.

Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6 Sample 7 Sample 8 Sample 9 Copolyester
8
9
10
11
12
13
14
15
16

Samples used for evaluation are shown in [Table 1] above. That is, the content of the copolyester in the composition of the present invention is changed in parts by weight.

At this time, when the copolyester is included in 7 parts by weight or less, there is no difference or significant difference from the control group that does not include the copolyester, and thus will be omitted from the description.

Test values for each sample are shown in [Table 2].

division Odor test ^ab Upon application Upon heating Control 212 437 Sample 1 187 334 Sample 2 165 319 Sample 3 62 205 Sample 4 62 211 Sample 5 63 210 Sample 6 61 209 Sample 7 58 200 Sample 8 55 187 Sample 9 54 174

^a : Odor intensity 0 to 999 (0: no odor, 999: most odor)

^b : average value of 3 measurements

As shown in Table 2, Sample 1 and Sample 2 were different from the control group, but no significant odor removal was performed. However, when the copolyester is contained in 10 parts by weight or more, it was confirmed that the odor was significantly removed compared to the control group, which means that the reference content of the copolyester is preferably 10 parts by weight or more compared to the acrylic resin, such It is judged that the starting point is a minimum value that expresses an odor removal effect when mixed with other compositions.

In addition, when the content of copolyester was increased from 10 parts by weight or more, it was confirmed that the effect of gradually removing the odor was significant, and the samples showing relatively large changes were Samples 7 and 8. Among these, in the case of Sample 8, since the effect on removing odor was expressed significantly, it is expected to be most preferable for use.

In addition, it was confirmed that the inclusion of more than 11 parts by weight of copolyester, the effect of removing odor was better than that of containing 10 parts by weight, but in this case, the strength was reduced or the curing was prevented by interfering with the expression of properties of other compositions. The problem of increasing the time for was found.

Increasing the content of other compositions in order to solve this problem will lead to an increase in cost, as well as an increase in the content of the composition, the effect of odor removal by the copolyester will be lowered.

The deterioration of the effect of the copolyester compared to the composition can be sufficiently predicted based on the results of Sample 1, Sample 2 and Sample 3.

It is obvious that the above description using the drawings is only the main points of the present invention, and that the present invention is not limited to the configuration of the drawings, as various designs are possible within the technical scope.

Claims (6)

In the malodor reduction type thermosetting acrylic resin composition with improved malodor reduction rate,
Based on 100 parts by weight of acrylic resin, 75 to 80 parts by weight of calcium carbonate, 1 to 2 parts by weight of anti-settling agent, 0.05 to 0.1 parts by weight of amine, 5 to 10 parts by weight of carbon fiber, 0.5 to 1 parts by weight of propylene oxide, aromatic copoly Characterized in that it contains 10 to 15 parts by weight of ester and 8 to 10 parts by weight of polypropylene, odor-reducing thermosetting acrylic resin composition.
delete The method according to claim 1,
The odor reduction type thermosetting acrylic resin composition,
Based on 100 parts by weight of acrylic resin, 80 parts by weight of calcium carbonate, 2 parts by weight of anti-settling agent, 0.1 parts by weight of amine, 10 parts by weight of carbon fiber, 1 part by weight of propylene oxide, 15 parts by weight of aromatic copolyester, 10 parts by weight of polypropylene It characterized in that it contains, the odor-reducing type thermosetting acrylic resin composition.
The method according to claim 3,
The polypropylene is prepared as a liquid,
A odor-reducing thermosetting acrylic resin composition, characterized by being prepared by mixing a raw material for producing polypropylene with water-soluble charcoal powder and applying heat.
The method according to claim 4,
The water-soluble charcoal powder,
Characterized in that 1 to 3 parts by weight based on 100 parts by weight of the raw material for manufacturing the polypropylene, malodor reduction type thermosetting acrylic resin composition.
The method according to claim 3,
The odor reduction type thermosetting acrylic resin composition,
The acrylic resin was first stirred for 15-20 minutes through a stirrer,
Next, the anti-settling agent is introduced to stir so that the anti-settling agent can be uniformly stirred on the acrylic resin.
Characterized in that the calcium carbonate, carbon fiber, propylene oxide, aromatic copolyester and polypropylene are added and stirred one by one, thereby reducing odor-reducing thermosetting acrylic resin composition.