KR20170071286A - Rapid drying paint composition for reparing crack using methyl methacrylate resin - Google Patents
Rapid drying paint composition for reparing crack using methyl methacrylate resin Download PDFInfo
- Publication number
- KR20170071286A KR20170071286A KR1020150179465A KR20150179465A KR20170071286A KR 20170071286 A KR20170071286 A KR 20170071286A KR 1020150179465 A KR1020150179465 A KR 1020150179465A KR 20150179465 A KR20150179465 A KR 20150179465A KR 20170071286 A KR20170071286 A KR 20170071286A
- Authority
- KR
- South Korea
- Prior art keywords
- weight
- methyl methacrylate
- methacrylate resin
- crack
- monomer
- Prior art date
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Classifications
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
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- C09D7/1216—
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/10—Homopolymers or copolymers of methacrylic acid esters
Abstract
The present invention relates to a cement admixture which is excellent in adhesion to concrete and asphalt and has excellent curing properties even at a low temperature and a room temperature by including a main portion and a curing agent portion including a methyl methacrylate resin, a methyl methacrylate monomer, an n-butyl acrylate monomer, To a crack repair material composition having excellent elongation and crack resistance.
Description
The present invention relates to a quick drying type crack repair material coating composition using a methyl methacrylate resin.
Existing crack repair materials are using crack repair materials using various resins such as epoxy, urethane, sealant and acrylic. Specifically, the epoxy-based crack repair material is excellent in strength and adherence to paint but has a problem of slow drying, particularly slowing down at low temperature, insufficient elongation, high risk of re-cracking, and poor weatherability. Urethane crack repair materials are excellent in flexibility but have low efficiency due to slow drying and topping work. In addition, the sealant-type crack repair material has a problem that the drying is slow and the plasticizer is eluted and affects the top surface, and the acrylic crack repair material has a problem that the drying is quick but the flexibility is poor.
Korean Patent Laid-Open Publication No. 2005-0069491 discloses an epoxy grout composition including an epoxy resin, a reactive diluent, a curing agent, and the like, but has a problem of insufficient elongation and slow drying.
Therefore, there is still a need for a crack repair composition that can provide excellent dryness, crack resistance, and waterproofness, and is excellent in adhesion to concrete and aspart.
The present invention includes a main portion and a hardener portion including a methyl methacrylate resin, a methyl methacrylate monomer, an n-butyl acrylate monomer, and calcium carbonate, and is excellent in adhesion to concrete and asphalt, It is an object of the present invention to provide a crack repair material composition which exhibits hardenability and has an elongation and is excellent in crack resistance.
The crack repair material coating composition of the present invention comprises a main portion and a hardener portion, wherein the main portion comprises 10 to 30% by weight of a methyl methacrylate resin, 3 to 15% by weight of a methyl methacrylate monomer, 3 to 15% by weight of butyl acrylate monomer, and 50 to 70% by weight of calcium carbonate.
INDUSTRIAL APPLICABILITY The coating composition for a crack repairing material of the present invention has excellent adhesion with concrete and asphalt, exhibits excellent curability even at low temperature and room temperature, has excellent elongation and crack resistance, and can be suitably used as a repair material for cracks.
Hereinafter, the present invention will be described in more detail.
The crack repair material coating composition of the present invention comprises a main portion and a hardener portion, wherein the main portion comprises 10 to 30% by weight of a methyl methacrylate resin, 3 to 15% by weight of a methyl methacrylate monomer, 3 to 15% by weight of butyl acrylate monomer, and 50 to 70% by weight of calcium carbonate.
The methyl methacrylate resin contained in the composition of the present invention may be contained in an amount of 10 to 30% by weight based on 100% by weight of the total amount of the main component. If the amount is less than 10% by weight, the coated film may break off. If the amount is more than 30% by weight, the viscosity is too high, and cracking is difficult.
The methyl methacrylate resin contained in the composition of the present invention may be, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n- (Meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate, glycidyl Based on 100% by weight of a methyl methacrylate-based resin, 55 to 65% by weight of methyl methacrylate, 20 to 40% by weight of n-butyl acrylate, 5 to 15% by weight of glycidyl methacrylate, % ≪ / RTI >
The methyl methacrylate resin of the present invention is not particularly limited, but it may have a glass transition temperature of 20 to 40 캜. If the temperature is higher than 40 ° C, cracking may occur. If the temperature is lower than 20 ° C, it may become too soft or tacky and degrade the resistance to abrasion. The methyl methacrylate resin may preferably be a methyl methacrylate polymer having a weight average molecular weight of 30,000 to 75,000, and may be, for example, 40,000 to 60,000. When the molecular weight of the methyl methacrylate resin is less than 30,000, the adhesion is decreased. When the molecular weight is more than 75,000, the viscosity is too high, which makes it difficult to form a paint. The methyl methacrylate resin used in the present invention is not particularly limited, but has a viscosity of Z2 + to Z6 +, a solid content of 50 to 70% by weight, and an acid value of more than 0 and 5 mg KOH / g or less. If the acid value is more than 5 mg KOH / g, the reactivity becomes poor and the drying delay is undesirable.
However, when the methyl methacrylate resin alone is used, it is difficult to control the film strength, the elongation and the viscosity. Therefore, the present invention is based on the finding that when a hard methacrylate monomer and a soft n-butyl acrylate monomer are used, The viscosity is easily controlled.
The methyl methacrylate monomer may be contained in an amount of 3 to 15% by weight based on 100% by weight of the total amount of the main component. When the content of the methyl methacrylate monomer exceeds 15% by weight, the film strength is high but cracks are generated. When the content of the methyl methacrylate monomer is less than 3% by weight, the strength is insufficient and the coating film is pressed.
The n-butyl acrylate monomer contained in the composition of the present invention may be contained in an amount of 3 to 15% by weight based on 100% by weight of the total amount of the main component. When the content of the n-butyl acrylate monomer is more than 15% by weight, cracks are excellent but the strength is low and durability is poor, and the film is pressed and contaminated by tacky, and when it is less than 3% there is a problem.
The calcium carbonate contained in the composition of the present invention acts as a filler and imparts the strength and abrasion resistance of the coating film to smooth sanding after the hardening of the coating film and smooth topography. The calcium carbonate may be contained in an amount of 50 to 70% by weight based on 100% by weight of the total amount of the main component. If it is less than 50% by weight, there is a problem that the abrasive property is insufficient, and when it exceeds 70% by weight, there is a problem that the resin component is insufficient and breaks easily.
The curing agent part included in the composition of the present invention may include a curing agent selected from the group consisting of benzoyl peroxide (BPO), di-tert-butyl peroxide and a combination thereof, The curing agent part is mixed with the main part to achieve quick curing, and the curing catalyst content can be controlled even at a low temperature to design fast curing. In the reaction between the methyl methacrylate resin and the curing agent, especially BPO is decomposed at 80 to 120 ° C to form radicals and cure reaction occurs. Since the BPO reaction is fast at high temperature and slow at low temperature, BPO blending ratio can be controlled.
The curing agent part is contained in an amount of 0.5 to 3% by weight based on 100% by weight of the total amount of the main component. If it is less than 0.5% by weight, there is a problem of uncured. If it is more than 3% by weight, there is a problem in workability because of a short pot life.
Although not particularly limited, the subject portion included in the composition of the present invention may further include at least one additive selected from the group consisting of a pigment, a thickener, a dispersant, a defoaming agent, a curing catalyst, and a polymerization stabilizer.
The pigments are mixed in order to make them have similar color to the substrate or to help the color formation of the top coat. Any conventional pigments can be used without limitation. The dispersing agent can be used for facilitating the pigment dispersibility and for preventing the aggregation and precipitation between the pigments, and any conventional dispersing agent can be used without limitation. Antifoaming agents are used to inhibit or break the formation of bubbles during material mixing or painting. Polymerization stabilizers are added in order to suppress the chemical reaction during storage and to give the stability of the coating, and to increase the pot life during the operation.
The thickener enhances the viscosity of the composition and imparts thixotropy so that it does not completely fill the cracks, but a certain amount is filled to reduce the amount of the coating, and the cracks of the coating are formed smoothly, facilitating the repair of cracks. As the thickening agent, an organic clay thickener, a silica-based thickener, a wax-based thickener, a urea-based thickener, and a combination thereof may be used without particular limitation.
The curing catalyst is used so that the curing agent can react at room temperature. As the curing catalyst, dimethyl aniline (DMA), bisomer para-toluidine may be used.
Although not particularly limited, the content of the additive may be 0.01 to 10% by weight based on 100% by weight of the total amount of the main component.
Hereinafter, the present invention will be described more specifically by way of examples. However, these examples are provided only for the understanding of the present invention, and the scope of the present invention is not limited to these examples in any sense.
[Example]
20 wt% of a methyl methacrylate resin (Tg 30 DEG C), 5 wt% of a methyl methacrylate monomer, 13.5 wt% of n-butyl acrylate, 0.1 wt% of a dispersing agent, 0.05 wt% of a polymerization stabilizer, 60 wt% (BPO) containing 2% by weight based on 100% by weight of the total of the main portion and the main portion mixed with 1% by weight of a thickener and 0.35% by weight of a curing catalyst.
[Comparative Example 1]
20 weight% of methyl methacrylate resin, 17.5 weight% of methyl methacrylate monomer, 1 weight% of n-butyl acrylate, 0.1 weight% of dispersant, 0.05 weight% of polymerization stabilizer, 60 weight% of calcium carbonate, 1 weight% A curing agent containing 0.35% by weight of a curing catalyst and 2% by weight of a curing agent (BPO) based on 100% by weight of the total amount of the main component.
[Comparative Example 2]
20 wt% of methyl methacrylate resin, 1 wt% of methyl methacrylate monomer, 17.5 wt% of n-butyl acrylate, 0.1 wt% of dispersant, 0.05 wt% of polymerization stabilizer, 60 wt% of calcium carbonate and 0.35 wt% And a curing agent (BPO) of 2 wt% based on 100 wt% of the total amount of the main portion.
[Comparative Example 3]
Crack repair material was prepared in the same manner as in Example 1 except that a methyl methacrylate resin having a molecular weight of 40,000 to 55,000, a Tg of 30 占 폚, a solid content of 60% by weight and an acid value of 7 mg KOH / g was used in Example 1 Respectively.
[Comparative Example 4]
Crack repair material was prepared in the same manner as in Example 1, except that a methyl methacrylate resin having a molecular weight of 40,000 to 55,000, a Tg of 30 占 폚, a solid content of 80% by weight and an acid value of 3 mg KOH / g was used in Example 1 Respectively.
[Comparative Example 5]
Except that a methyl methacrylate resin having a molecular weight of 40,000 to 55,000, a Tg of 10 占 폚, a solid content of 60% by weight and an acid value of 3 mg KOH / g in Example 1 was used as a curing agent .
Methyl methacrylate resin 1: molecular weight 40,000 to 55,000, Tg: 30 占 폚, solid content 60% by weight, acid value 3 mg KOH / g
Methyl methacrylate resin 2: molecular weight 40,000 to 55,000, Tg: 30 占 폚, solid content 60% by weight, acid value 7 mg KOH / g
Methyl methacrylate resin 3: molecular weight 40,000 to 55,000, Tg: 30 占 폚, solid content 80% by weight, acid value 3 mg KOH / g
Methyl methacrylate resin 4: molecular weight 40,000 to 55,000, Tg: 10 占 폚, solid content 60% by weight, acid value 3 mg KOH / g)
Dispersant (BYK-163 manufactured by BYK)
The polymerization stabilizer (2,6-Di-tert-butyl-4-methylphenol)
Calcium carbonate (manufactured by Omiya Co.)
Thickening agents (Hydrophilic Fumed Silica, viscosity: 30 ~ 50 (g / l ), SiO 2 content of ≥99.8)
Curing catalyst (N, N-bis- (2-hydroxyethyl) -para-toluidine, MW: 207)
Benzoyl peroxide
The properties of the crack repair materials prepared in the above Examples and Comparative Examples were measured as shown in Table 2 below.
1) Curing time
After mixing the base and the curing agent at a certain ratio, a coating film is formed so that the coating thickness is 1 mm. Curing drying refers to a state in which the coat is stretched or wrinkled and there is no abnormality when the arm is vertically placed on the coated film surface and is twisted at an angle of 90 ° while being strongly pressed with the thumb.
2) Thixo
The temperature of the paint is adjusted to 25 ° C and measured using a Brookfield viscometer. The specimens are measured at a speed of 5 rpm and a viscosity of 50 rpm, and the value obtained by dividing the viscosity at 5 rpm by the viscosity at 50 rpm is called the Thixo Index.
3) Elongation
After mixing the base and the curing agent at a certain ratio, the specimen is made to form a film thickness of 1 to 3 mm. The test specimens are cut using KS M 3006 first type test specimen and pulled until the specimens are cut at a constant force using a UTM instrument. Elongation is the percentage of the length of the specimen divided by the length of the previous specimen.
4) Adhesion
The mixture of the base and the hardener is mixed at a certain ratio and then the concrete or the asphalt is coated so that the film thickness is 1 to 3 mm. The specimens are dried in a standard condition (temperature 20 ± 2 ° C, humidity 65 ± 5%) for 24 hours and confirmed with a Dolly test instrument.
5) Workability
Mix the base and the hardener in a certain ratio and check the workability by plugging them using a putty knife.
As shown in Table 2, when the methyl methacrylate monomer content is high as in Comparative Example 1, the elongation after curing is low and cracks may occur. On the contrary, when the content of n-butyl acrylate monomer is high The elongation is high, but there is less tacky on the film, which can cause film fouling problems.
On the other hand, Example 1, which is a repair material for cracks according to the present invention, has an appropriate elongation and adhesive strength, and a thixotropic property is increased due to application of a thickening agent, and thus a smooth film is formed between cracks to improve workability.
Claims (4)
The subject part is based on a total of 100% by weight
10 to 30% by weight of a methyl methacrylate resin,
3 to 15% by weight of methyl methacrylate monomer,
3 to 15% by weight of n-butyl acrylate monomer, and
And 50 to 70% by weight of calcium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150179465A KR101805992B1 (en) | 2015-12-15 | 2015-12-15 | Rapid drying paint composition for reparing crack using methyl methacrylate resin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150179465A KR101805992B1 (en) | 2015-12-15 | 2015-12-15 | Rapid drying paint composition for reparing crack using methyl methacrylate resin |
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| Publication Number | Publication Date |
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| KR20170071286A true KR20170071286A (en) | 2017-06-23 |
| KR101805992B1 KR101805992B1 (en) | 2017-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220125844A (en) * | 2021-03-04 | 2022-09-15 | 주식회사 정석케미칼 | Room temperature curing maintenance reinforcing composition for asphalt and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102465240B1 (en) * | 2021-11-04 | 2022-11-09 | 주식회사 은진공업 | Two-component room temperature curing type paint composition for road marking with excellent wear resistance and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101477750B1 (en) * | 2014-07-23 | 2015-01-06 | 주식회사 태웅산업 | Paint composition for painting lane of the road with two liquid type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220125844A (en) * | 2021-03-04 | 2022-09-15 | 주식회사 정석케미칼 | Room temperature curing maintenance reinforcing composition for asphalt and construction method thereof |
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| KR101805992B1 (en) | 2017-12-07 |
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