KR101967434B1 - Method of preparing flooring composition - Google Patents

Abstract

The present invention relates to a method for producing a flooring composition comprising a polyolefin resin, an alpha-olefin-based copolymer modified with maleic anhydride, and a styrene block copolymer modified with maleic anhydride, The present invention relates to a method for manufacturing a flooring composition capable of adjusting noise by ball repulsion characteristics and improving adhesion and drawing lines without a primer treatment process while satisfying required properties such as impact resistance, impact absorbability, dimensional stability and low temperature impact resistance.

Description

METHOD OF PREPARING FLOORING COMPOSITION [0001]

The present invention relates to a method for producing a flooring composition. More particularly, the present invention relates to a method for producing a flooring composition which can be used for a sporting arena or a living sports facility and a grass protection mat.

Conventionally, clay, concrete, urethane, etc. have been used for indoor and outdoor flooring materials. However, recently, synthetic flooring materials have been increasingly used together with artificial turf.

Such plastic flooring materials are inexpensive, and polypropylene having excellent chemical resistance and mechanical performance is widely used. However, when polypropylene is used as a sole substrate, it is stiff, slippery, has a dimensional change, and tends to be cracked due to Brittleness at a low temperature. In order to reduce such defects, polyethylene (PE) and thermoplastic elastomer (TPE) are mixed with polypropylene to ensure flexibility and impact resistance at low temperatures.

However, since the surface of the conventional plastic flooring material is non-polar, it does not adhere well to the acrylic-based white coating material used when the line is drawn. Therefore, in order to draw a line on the surface of the flooring material, primer treatment has to be preceded.

Meanwhile, Korean Patent Laid-Open Publication No. 10-2007-0084308 (Aug. 24, 2007) is a propylene-based resin composition suitably used for various purposes and an invention related to its use. This is from 1 to 90% by weight of isotactic polypropylene. 1 to 80% by weight of a styrene-based elastomer, 0 to 70% by weight of an ethylene alpha-olefin copolymer having a density of 0.85 to 0.91 g / cm ³ , and the like. The thermoplastic resin composition A floor material is disclosed. It is also disclosed that an additive such as a lubricant and an antioxidant can be blended to the extent that the object of the invention is not impaired. However, unlike the present invention, a composition for a floor material capable of drawing a line without an additional primer process due to improved adhesion to the surface of a bottom material, comprising a composition comprising an alpha-olefin-based copolymer modified with maleic anhydride and a styrenic block copolymer There is no disclosure at all.

Korean Patent Registration No. 10-1113256 (Nov. 4, 2011) is an invention relating to an elastic flooring material having a slip prevention function. Wherein the thermoplastic elastomer is an SBS block copolymer, an olefin block copolymer, or a polyolefin elastomer, wherein the thermoplastic elastomer comprises 10 to 100 parts by weight of unvulcanized EPDM rubber and 20 to 100 parts by weight of a polyolefin per 100 parts by weight of the thermoplastic elastomer Based on the total weight of the composition. However, no disclosure has been made on a composition comprising an alpha-olefin-based copolymer modified with maleic anhydride and a styrenic block copolymer as a plastic flooring composition capable of improving the adhesion of the surface of the bottom layer and drawing lines without a separate primer process none.

Korean Patent Publication No. 10-2007-0084308 (2007.8.24) Korean Patent Registration No. 10-1113256 (November 4, 2011)

An object of the present invention is to provide a flooring material having improved physical properties such as friction characteristics, impact absorbability, dimensional stability, low temperature flexibility and low noise characteristics to be coated as a floor material, And to provide a method for producing the composition.

(A) 100 parts by weight of a polypropylene resin, 5 to 30 parts by weight of an alpha-olefin copolymer modified with maleic anhydride to 100 parts by weight of the polypropylene resin and 1 to 25 parts by weight of a styrene block copolymer modified with maleic anhydride Preparing a pellet comprising a part by weight; (b) 20 parts by weight of a polypropylene resin and 70 parts by weight to 100 parts by weight of a functional additive to 20 parts by weight of the polypropylene resin; And (C) preparing a composition for flooring comprising 100 parts by weight of the pellets and 5 to 30 parts by weight of the masterbatch per 100 parts by weight of the pellets.

2. The flooring composition according to 1 above, wherein the polypropylene resin comprises at least one selected from the group consisting of homopolypropylene, a polypropylene random copolymer, a polypropylene block copolymer, and an alloy of polypropylene and polyethylene Gt;

3. In the first place, the flexural modulus of the polypropylene resin 1000kg / cm ² or more 20000kg / cm ² or less, a method for the manufacture of flooring compositions.

4. The method for producing a composition for flooring according to 1 above, wherein the α-olefin-based copolymer modified with maleic anhydride has a glass transition temperature of 0 ° C. or less and a crystallinity of 35% or less.

5. In the first place, the alpha modified with the maleic anhydride-olefin-based copolymer has a density of a density of 0.82 g / cm ³ To 0.95 g / cm < ³ >.

6. The process for producing a flooring composition according to 1 above, wherein the styrenic block copolymer has a weight average molecular weight of 140,000 to 280,000.

7. The method of claim 1, wherein the pellet further comprises an ultraviolet stabilizer, wherein the functional additive is at least one selected from the group consisting of a dimension stabilizer, a noise control agent, and a thermal oxidation inhibitor.

8. The method for producing a composition for flooring according to 7 above, wherein the dimension stabilizer is contained in an amount of 10 to 40 parts by weight based on 100 parts by weight of polypropylene in the composition for flooring.

9. The method for producing a flooring composition according to 7 above, wherein the noise control agent is contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of polypropylene in the composition for flooring.

10. The method for producing a composition for flooring according to 7 above, wherein the UV stabilizer is contained in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of polypropylene in the composition for flooring.

11. The method for producing a composition for flooring according to 7 above, wherein the thermal oxidation inhibitor is contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of polypropylene in the composition for flooring.

The flooring composition prepared according to the present invention has a lower surface contact angle than conventional flooring materials and has a high surface energy, so that it can be coated without any additional primer treatment since the adhesive strength is improved, so that a flooring material capable of simplifying the process and reducing the cost can be manufactured .

Further, the flooring composition produced by the present invention can produce a flooring which can satisfy soundness properties such as friction characteristics, impact absorbability, dimensional stability and low temperature impact resistance which should be inherently possessed as a flooring.

FIG. 1A is a photograph showing the contact angle of distillation water of a flooring prepared according to Example 4 of the present invention. FIG.
FIG. 1B is a photograph showing the contact angle of the flooring prepared according to Comparative Example 1 of the present invention to distilled water. FIG.
2A is a photograph showing the contact force test result of the floor material manufactured according to the first embodiment of the present invention.
2B is a photograph showing a contact force test result of the flooring prepared according to Comparative Example 1 of the present invention.
2C is a photograph showing the contact force test result of the flooring prepared according to Comparative Example 4 of the present invention.

Hereinafter, the present invention will be described in detail. The following examples illustrate the present invention but are not to be construed as limiting the scope of the appended claims. The scope of the present invention should not be construed as limiting the scope of the present invention, It will be apparent to those skilled in the art that various changes and modifications are possible and that such variations and modifications fall within the scope of the appended claims.

(A) 100 parts by weight of a polypropylene resin, 5 to 30 parts by weight of an alpha-olefin copolymer modified with maleic anhydride to 100 parts by weight of the polypropylene resin, and 5 to 30 parts by weight of a styrene block Making a pellet comprising 1 to 25 parts by weight of a copolymer; (b) 20 parts by weight of a polypropylene resin and 70 parts by weight to 100 parts by weight of a functional additive to 20 parts by weight of the polypropylene resin; And (C) melt-mixing 100 parts by weight of the pellets and 5 to 30 parts by weight of the masterbatch to prepare a composition for a flooring.

First, 100 parts by weight of a polypropylene resin, 5 to 30 parts by weight of an alpha-olefin copolymer modified with maleic anhydride to 100 parts by weight of the polypropylene resin, and 1 to 25 parts by weight of a styrene block copolymer modified with maleic anhydride (A) < / RTI >

In one embodiment of the present invention, the polypropylene resin is used as a base resin for a composition for flooring.

As the polypropylene resin, a polypropylene resin commonly used in the art can be used without limitation, and examples thereof include homo polypropylene, polypropylene random copolymer and polypropylene block copolymer A polypropylene block copolymer and at least one selected from the group consisting of polypropylene and polyethylene alloys.

The flexural modulus of the polypropylene resin according to an embodiment of the present invention is preferably 1000 kg / cm ² to 20000 kg / cm ² ≪ / RTI > In the above range, the bottom material can exhibit better resistance to bending strength. When the flexural modulus of the polypropylene resin is 20000 kg / cm < ² > If it exceeds 1000 kg / cm ² , there may be a problem in dimensional stability of the flooring material.

One embodiment of the present invention includes the alpha-olefin-based copolymer modified with maleic anhydride to improve the impact resistance and flexibility at low temperatures of the polypropylene and improve the surface adhesion of the flooring.

When the content of the alpha-olefin-based copolymer modified with maleic anhydride is 5 to 30 parts by weight based on 100 parts by weight of the polypropylene resin, excellent adhesiveness, impact resistance at low temperatures, flexibility, workability and mechanical strength can be expected . If the content of the alpha-olefin-based copolymer modified with maleic anhydride is less than 5 parts by weight based on 100 parts by weight of the polypropylene resin, it is difficult to expect an effect of improving impact resistance, flexibility and adhesion at low temperatures. It is difficult to expect workability and mechanical strength as a bottom material.

In one embodiment of the present invention, the α-olefin-based copolymer modified with maleic anhydride may have a glass transition temperature of 0 ° C. or less and a crystallinity of 30% or less. When the glass transition temperature is 0 DEG C or less and the crystallinity is 30% or less, the effect of improving the impact resistance and flexibility at low temperature of the bottom material is excellent. If the glass transition temperature is higher than 0 ° C, it is difficult to expect a complementary effect of impact resistance at low temperatures. If the crystallinity exceeds 30%, it may be difficult to expect a complementary effect of flexibility.

Also, the impact resistance at low temperature is not particularly limited so long as the glass transition temperature is not higher than 0 占 폚, since the α-olefin-based copolymer maintains a rubbery state even at a low temperature, thereby anticipating the impact resistance. When the degree of crystallization is 30% or less, flexibility can be expected to be complemented by 70% or more of the amorphous portion. Therefore, the lower limit of the crystallinity is not particularly limited. For example, the glass transition temperature may be -50 ° C or higher, and the crystallinity may be 0% or higher, but is not limited thereto.

In an embodiment of the present invention, the alpha-olefin copolymer may be any polypropylene resin conventionally used in the art, including but not limited to ethylene-octene copolymer (Ethylene-Octene Copolymer) or ethylene- (Ethylene-Butene Copolymer).

The density of the alpha-olefin copolymer according to one embodiment of the present invention is 0.82 g / cm < ³ > To 0.95 g / cm < ³ >. In this range, the impact resistance effect at low temperature can be more excellently expressed. If the density of the alpha-olefin copolymer is less than 0.82 g / cm ³ , the mechanical strength may be lowered, and if the density of the alpha-olefin copolymer is more than 0.95 g / cm ³ , the impact resistance effect may be reduced.

The alpha-olefin copolymer modified with maleic anhydride can be produced by, for example, grafting maleic anhydride to an alpha-olefin copolymer using an organic peroxide as a catalyst at a reaction temperature of 180 ° C to 200 ° C by a free radical polymerization method, But is not limited thereto.

When the alpha-olefin copolymer modified with maleic anhydride is blended with the polypropylene resin, the polar group of maleic anhydride improves the non-polar surface of the polypropylene alone to improve the adhesion.

In one embodiment of the present invention, the inclusion of a styrenic block copolymer modified with maleic anhydride leads to improved properties such as friction characteristics, impact absorbability, dimensional stability, low temperature flexibility, UV and ozone resistance, high temperature and low temperature durability Adhesiveness of the flooring can be improved while maintaining physical properties such as water resistance and water resistance. It is considered that the physical properties of the bottom material are improved due to the rubber component which is a part of the styrene block copolymer. When the styrene block copolymer is modified with maleic anhydride, compatibility with the polypropylene resin is increased, .

The styrenic block copolymer according to an embodiment of the present invention may be a styrenic block copolymer commonly used in the art without limitation, and examples thereof include styrene-butadiene-styrene (SBS), styrene-ethylene Butadiene-styrene (SEBS), styrene-ethylene-propylene-styrene (SEPS) and styrene-isoprene-styrene (SIS).

The content of the maleic anhydride modified styrenic block copolymer according to an embodiment of the present invention may be 1 to 25 parts by weight based on 100 parts by weight of the polypropylene resin. In this case, the adhesion can be improved while maintaining physical properties such as friction characteristics, impact absorption properties, dimensional stability, low temperature flexibility, UV and ozone resistance, high temperature and low temperature durability (resistance to cracking at high temperature and low temperature) . If the content of the styrene block copolymer modified with maleic anhydride is less than 1 part by weight based on 100 parts by weight of the polypropylene resin, it is difficult to expect an improvement in the adhesion. If the content exceeds 25 parts by weight, workability and mechanical strength have.

The content of the maleic anhydride modified styrenic block copolymer according to an embodiment of the present invention may be 1 to 25 parts by weight based on 100 parts by weight of the polypropylene resin. In this case, the adhesion can be improved while maintaining physical properties such as friction characteristics, impact absorption properties, dimensional stability, low temperature flexibility, UV and ozone resistance, high temperature and low temperature durability (resistance to cracking at high temperature and low temperature) . When the content of the styrene block copolymer modified with maleic anhydride is less than 1 part by weight based on 100 parts by weight of the polypropylene resin, it is difficult to expect an improvement in the adhesive strength. If the content exceeds 25 parts by weight, workability and mechanical strength as a bottom material are hardly expected.

In one embodiment of the present invention, the method of modifying the maleic anhydride of the styrenic block copolymer may be carried out in the same manner as the method of modifying the alpha olefin. However, the addition amount of maleic anhydride may be 3% by weight or less.

When the styrene block copolymer modified with maleic anhydride is blended with a polypropylene resin, the polar group of maleic anhydride improves the nonpolar surface of the polypropylene alone to improve the adhesion.

The pellets may be prepared by heating the components at 190 to 230 DEG C in a mixing agitator, melt mixing, and then cooling to room temperature.

The pellet may further contain 0.5 to 5 parts by weight of an ultraviolet stabilizer based on 50 parts by weight of the polypropylene resin.

The ultraviolet stabilizer prevents degradation such as deterioration of mechanical properties and discoloration due to ultraviolet rays when the flooring is used outdoors, thereby giving excellent durability.

The ultraviolet stabilizer according to one embodiment of the present invention can be used without limitation as ultraviolet stabilizers commonly used in the art, for example, phenol, 2- (2H-benzotriazol-2-yl) Benzotriazol-2-yl) -4-methyl, phenol, 2- (5-chloro-2H-benzotriazol- 2-yl) -6- (1,1-dimethylethyl) -4-methyl, phenol, 2- (4,6-diphenyl- 2-yl) -5-hexyloxy (Phenol, 2- (4-, 6-Diphenyl-1,3,5-triazin- 2-hydroxy-4-n-octoxybenzophenone, and hindered amine. The term " hindered amine "

When the content of the ultraviolet stabilizer is 0.5 to 5 parts by weight based on 100 parts by weight of the polypropylene, the ultraviolet stabilizer has an excellent effect of preventing deterioration by ultraviolet rays. If the content of the ultraviolet stabilizer is less than 0.5 parts by weight based on 100 parts by weight of the polypropylene resin, it is difficult to expect an effect of preventing deterioration by ultraviolet rays. If the content exceeds 5 parts by weight, the additional effect is insufficient.

Next, a master batch containing 70 parts by weight to 100 parts by weight of the functional additive is prepared for 20 parts by weight of the polypropylene resin (b) and 20 parts by weight of the polypropylene resin (b).

The masterbatch can be prepared by masterbatching the above components by heating in a mixing agitator at 190 占 폚 to 230 占 폚, melt mixing, and then cooling to room temperature.

The functional additive may be at least one selected from the group consisting of a dimension stabilizer, a noise control agent, and a thermal oxidation inhibitor.

The dimensional stabilizer can prevent the deformation of the flooring due to the large thermal expansion rate of the polypropylene. The size stabilizer according to one embodiment of the present invention may be any size stabilizer commonly used in the art, and examples thereof include organic clay such as montmorillonite, bentonite, mica, vermiculite, Clay) may be used.

The content of the dimension stabilizer according to one embodiment of the present invention may be 10 to 40 parts by weight based on 100 parts by weight of polypropylene in the composition for flooring. When the dimensional stabilizer is included in the composition for flooring in an amount of 10 to 40 parts by weight based on 100 parts by weight of the polypropylene, the dimensional stability effect may be excellent. If the content of the dimension stabilizer is less than 10 parts by weight based on 100 parts by weight of the polypropylene resin in the composition for flooring, it is difficult to expect a dimensional stability effect. If the content of the dimension stabilizer exceeds 40 parts by weight, workability and mechanical strength as a flooring agent may be difficult to expect.

The noise control agent according to an embodiment of the present invention can be used as a noise control agent which is commonly used in the art without limitation, for example, aluminum silicate prototype A hollow body may be used.

The noise control agent may be included in an amount of 1 to 10 parts by weight based on 100 parts by weight of polypropylene in the composition for flooring. When the noise control agent is included in the composition for flooring in an amount of 1 to 10 parts by weight based on 100 parts by weight of the polypropylene, the noise control effect may be excellent. If the content of the noise control agent is less than 1 part by weight with respect to 100 parts by weight of polypropylene in the composition for flooring, no noise control effect can be expected. If it exceeds 10 parts by weight, workability and mechanical strength as a flooring material may be difficult to expect.

The thermal oxidation inhibitor can prevent thermal oxidation of the resin due to high temperature during injection molding. The thermal antioxidant according to an embodiment of the present invention can be used without limitation as a thermal antioxidant conventionally used in the art, for example, tetrakis methylene (3,5-di-tert-butyl- Phenyl) propionate methane, octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2,2'- Phenol), and 2,6-di-tert-butyl-4-methylphenol.

The thermal oxidation inhibitor may be contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the polypropylene resin in the composition for flooring. When the thermal antioxidant is included in the composition for flooring in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the polypropylene resin, the thermal oxidation inhibitor may have an excellent effect of preventing thermal oxidation. If the content of the thermal oxidation inhibitor is less than 0.1 part by weight based on 100 parts by weight of the polypropylene resin in the composition for flooring, it is difficult to expect a thermal oxidation prevention effect. If the amount is more than 5 parts by weight, the additional effect may be insufficient but the manufacturing cost may be increased.

Next, a composition for flooring comprising 100 parts by weight of the pellets and 100 parts by weight of the pellets is prepared, which comprises 5 to 30 parts by weight of the masterbatch.

The composition for flooring may be prepared by melt mixing 5 to 30 parts by weight of masterbatch in an extruder at 190 to 230 캜 with respect to 100 parts by weight of pellets and 100 parts by weight of the pellets. If the master batch is less than 5 parts by weight based on 100 parts by weight of the pellets, the effect of including the functional additive is insignificant. If the master batch is more than 30 parts by weight, the strength of the produced flooring may be weak.

The flooring composition can be produced by molding the composition for flooring according to an embodiment of the present invention by a method known in the art. For example, flooring can be manufactured by injection molding.

The flooring produced by one embodiment of the present invention can be used as flooring for various applications. For example, it can be used as indoor flooring, outdoor flooring and sports flooring, grass protection mat, and the like, preferably as a flooring for sports games.

Example  One

The components and the contents according to the following Table 1 were used to prepare a composition for flooring.

Specifically, 100 g of polypropylene, 7 g of a maleic anhydride modified alpha-olefin copolymer, 3 g of a maleic anhydride modified styrenic block copolymer and 3 g of an ultraviolet stabilizer were mixed and melt mixed at 210 DEG C and cooled to 25 DEG C to prepare pellets Respectively.

10 g of a polypropylene resin, 7 g of a dimension stabilizer, 5 g of a noise control agent, and 0.5 g of a thermal oxidation inhibitor were put into a mixing agitator, melt mixed at 210 캜 and cooled to 25 캜 to prepare a master batch.

100 g of the resulting pellets and 15 g of the master batch were melted and mixed at 210 DEG C to prepare a composition for flooring.

The flooring composition was prepared by injection molding.

Example  2 to 7 and Comparative Example  1 to 4

A flooring composition and a flooring material were prepared in the same manner as in Example 1, except that the composition according to Table 1 was changed.

Pellets Master batch Polypropylene resin (g) The alpha-olefin copolymer (g) The styrenic block copolymer (g) UV stabilizer (g) Polypropylene resin (g) Dimension stabilizer (g) Noise regulator (g) Thermal antioxidant (g) Maleic anhydride modification Unmodified Maleic anhydride modification Unmodified Example 1 100 7 - 3 - One 20 60 10 One Example 2 100 10 - 5 - One 20 80 10 18 Example 3 100 13 - 5 - One 20 120 20 5 Example 4 100 17 - 10 - One 20 400 30 4 Example 5 100 10 - 15 - 4 20 200 40 8 Example 6 100 25 - 20 - 4 20 80 40 4 Example 7 100 15 - 24 - 4 20 60 40 4 Comparative Example 1 100 - - - - - 20 - - - Comparative Example 2 100 - - - - 0.3 20 - - - Comparative Example 3 100 - - - - 0.5 20 - - - Comparative Example 4 100 - 7 - 3 One 20 60 10 One - Polypropylene: Polypropylene Block copolymer JM36 (Lotte Chemical) Flexural modulus 13000kgf / cm ²
MFI (Melt Flow Index) 2.5 g / 10 min. (190 占 폚, 5 kg load) Maleic anhydride grafted POE, CMG5805 (Jiangsu, China) MFI
- Unmodified alpha-olefin copolymer: Ethylene-octene copolymer, LUCENE (LG Chemical) MFI 3.6 g / 10 min (190 ° C and 21.6 kg load)
- Maleic anhydride modified styrenic block copolymer: FG1901 (Kraton Polymer, USA) MFI 22 g / 10 min (230 ° C and 5 kg load) Styrene-ethylene-butylene-
- MFI of 22g / 10min (200 ° C and 5kg load), MFI of styrene-ethylene-butylene-styrene, MD6945 (Kraton Polymer, USA)
- Dimension stabilizer: Wollastonite
- UV stabilizer: 2-hydroxy-4-N-octoxybenzophenone
- Noise control agent: Hollowed spherical silica
- Thermal antioxidant: 2,6-di-tert-butyl-4-methylphenol

Experimental Example

Test pieces were prepared from the flooring prepared in the above Examples and Comparative Examples. The adhesion performance of the prepared flooring was evaluated by the following method for each test piece. The contact angle measurement results and the adhesive force test results are shown in Table 3, Figs. 1A to 1C, and Figs. 2A to 2C.

One. Contact angle  Measure

1) Preparation of Test Specimens: For the measurement of the contact angle, specimens of comparative examples of 20 mm x 70 mm x 1 mm and experimental examples were prepared through injection molding.

2) Test method: The contact angle was measured by Sessile drop method using Rame-Hart goniometer. The contact angle was measured using distilled water. The contact angle of 10 specimens was measured and the mean value was calculated.

2. Adhesion test ASTM  D3359-17 (Standard Test Methods for Rating Adhesion by Tape Test)

1) Preparation of test piece: In order to evaluate the adhesion performance of the flooring, acrylic paint used in the stadium was painted on the injection-molded sheet in the composition of the comparative example and the example, The test piece was left standing for 24 hours.

2) Test method

The adhesion performance of the flooring material was evaluated by the following ASTM D3359-17 test method.

a) Using a gold-plated knife and a gold-plated knife (0.5 mm reference) on the painted surface of the specimen prepared in 1), the blade angle is between 15 ° and 30 °, The grids were formed by grinding them in six rows (1 mm spacing up to 50 μm / 2 mm spacing up to 125 μm).

b) The paint adhesion test tape (3M # 610) was closely adhered to the surface of the test piece on which the lattice was formed, and then the tape was pulled out at a proper speed while keeping it at 180 °.

c) The state of the surface of the coated test piece from which the tape was peeled off was judged visually by referring to the following Table 2, and the result was recorded.

Of the coating film Degree of peeling ASTM  Rating One

0% 5B 2

Less than 5% 4B 3

5 to 15% 3B 4

15 to 35% 2B 5

35 to 65% 1B 6

Greater than 65% 0B

Contact angle (°) Adhesion Example 1 59.1 4B Example 2 48 4B Example 3 54 4B Example 4 37.1 4B Example 5 32 5B Example 6 34 4B Example 7 28 5B Comparative Example 1 115 0B Comparative Example 2 108 1B Comparative Example 3 110 1B Comparative Example 4 88.6 1B

As shown in Table 3, Examples 1 to 7 including an alpha-olefin-based copolymer modified with maleic anhydride and a styrene block copolymer modified with maleic anhydride had better adhesion performance than Comparative Examples 1 to 4, And the contact angle with distilled water was small.

FIGS. 1A and 1B are photographs showing contact angle measurement results with distilled water for the test pieces of Example 4 and Comparative Example 1, respectively. 1A and 1B, it was confirmed that the contact angle with the distilled water of Example 4 was significantly smaller than the contact angle with the distilled water of Comparative Example 1.

Figs. 2A to 2C are photographs showing the contact force measurement results of the test pieces of Example 1, Comparative Example 1 and Comparative Example 4, respectively. Referring to FIGS. 2A to 2C, it can be confirmed that the adhesive strength of Example 1 is superior to that of Comparative Examples 1 and 4.

In particular, comparing Example 1 of FIG. 2A with Comparative Example 4 of FIG. 2C, it was found that the alpha-olefin and styrene block copolymer modified with maleic anhydride more than the alpha-olefin and styrene block copolymer not modified with maleic anhydride It was confirmed that the contact angle with the distilled water was further reduced, and the adhesiveness was further improved.

Thus, flooring made from a composition for flooring containing an alpha-olefin-based copolymer modified with maleic anhydride and a styrenic block copolymer modified with maleic anhydride was able to draw lines of the stadium without a primer treatment process.

Claims (11)

(a) 100 parts by weight of a polypropylene resin having a flexural modulus of 13,000 to 20,000 kgf / cm ² , 5 to 30 parts by weight of an alpha-olefin copolymer modified with maleic anhydride having a crystallinity of 30% or less with respect to 100 parts by weight of the polypropylene resin And 1 to 25 parts by weight of a styrenic block copolymer modified with maleic anhydride;
(b) 20 parts by weight of a polypropylene resin having a flexural modulus of 13,000 to 20,000 kgf / cm ² and 70 to 100 parts by weight of a functional additive to 20 parts by weight of the polypropylene resin; And
(C) preparing a composition for a sports arena flooring comprising 100 parts by weight of the pellets and 5 to 30 parts by weight of the master batch for 100 parts by weight of the pellets.
The sports arena flooring composition according to claim 1, wherein the polypropylene resin comprises at least one selected from the group consisting of homopolypropylene, a polypropylene random copolymer, a polypropylene block copolymer and an alloy of polypropylene and polyethylene ≪ / RTI >
delete The method according to claim 1, wherein the α-olefin-based copolymer modified with maleic anhydride has a glass transition temperature of 0 ° C or lower.
The method according to claim 1, wherein the maleic anhydride modified alpha-olefin copolymer has a density of 0.82 g / cm ³ To 0.95 g / cm < ³ >.

The method according to claim 1, wherein the styrenic block copolymer has a weight average molecular weight of 140,000 to 280,000.

The method according to claim 1, wherein the pellet further comprises an ultraviolet stabilizer, wherein the functional additive is at least one selected from the group consisting of a dimensional stabilizer, a noise control agent, and a thermal oxidation inhibitor.
The method according to claim 7, wherein the dimension stabilizer is contained in an amount of 10 to 40 parts by weight based on 100 parts by weight of polypropylene in the composition for a sports arena flooring.
[Claim 7] The method according to claim 7, wherein the noise control agent is included in 1 to 10 parts by weight with respect to 100 parts by weight of polypropylene in the composition for a sports arena flooring.
The method according to claim 7, wherein the ultraviolet light stabilizer is contained in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of polypropylene in the composition for the sports arena flooring.
The method according to claim 7, wherein the thermal oxidation inhibitor is included in the composition for the sports arena floor material in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the polypropylene.

Images