KR20110014818A - Composition for manufacturing decotile surface layer - Google Patents

Abstract

PURPOSE: A composition for manufacturing a decotile surface layer is provided to ensure the same or excellent properties such as profitability, durability, weatherability, abrasion resistance and transparency as polyvinyl chloride. CONSTITUTION: A composition for manufacturing a decotile surface layer includes 100.0 parts by weight of styrene butadiene copolymers, 15-35 parts by weight of styrene acrylate-based copolymers, 20-50 parts by weight polystyrene-based modified elastomers, 0.1-1 parts by weight antioxidants, 0.2-2 parts by weight UV stabilizers and 0.1-1 parts by weight of processing lubricants.

Description

Composition for preparing decotile surface layer {COMPOSITION FOR MANUFACTURING DECOTILE SURFACE LAYER}

The present invention relates to an environment-friendly, economical, processability, weather resistance, wear resistance and transparency for the composition for producing a decotile surface layer, more specifically 100 parts by weight of styrene butadiene copolymer, 15 to 35 parts by weight of styrene acrylate copolymer, 20 to 50 parts by weight of polystyrene-based modified elastomer, 0.1 to 1 parts by weight of antioxidant, 0.2 to 2 parts by weight of UV stabilizer and 0.1 to 1 parts by weight of processing lubricant.

The present invention relates to an environment-friendly, economical, processability, weather resistance, wear resistance and transparency for the composition for producing a decotile surface layer.

Conventionally, polyvinyl chloride is mainly used as a material for the surface layer of the decotile. Recently, the use of environment-friendly materials is mandatory in developed countries, and the use of polyvinyl chloride that emits harmful substances is prohibited or strictly used. It is limited.

In order to solve this problem, DuPont has developed an inomer resin to replace polyvinyl chloride, but when the resin forms a decotile surface layer, a calendering method is not applicable, and an extrusion tee-die (T -die) There was a problem of being limited by the process because it can be implemented only by the process.

In addition, the ionomer resin has a problem of low adhesion with the printing layer formed on the lower surface layer due to low adhesive strength with other types of synthetic resins, and has a high heat shrinkage rate and low dimensional stability, thereby forming a surface layer with the ionomer resin. If there was a problem that the defect rate is very high.

In addition, since the price of the inomer resin is considerably higher than that of polyvinyl chloride, when the surface layer of the decotile is formed of the inomer resin, the price of the decotile is improved, thereby lowering economic efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a composition for preparing a decotile surface layer that can be applied to both a calendering method and an extruded tee-die method while exhibiting properties similar to or better than those of polyvinyl chloride, such as economy, durability, weather resistance, abrasion resistance, and transparency.

It is another object of the present invention to provide a composition for preparing a decotile surface layer that does not release endocrine disrupting substances at high temperatures such as polyvinyl chloride.

An object of the present invention is 100 parts by weight of styrene butadiene copolymer, 15 to 35 parts by weight of styrene acrylate copolymer, 20 to 50 parts by weight of polystyrene-based modified elastomer, 0.1 to 1 parts by weight of antioxidant, 0.2 to 2 parts by weight of UV stabilizer And it is achieved by providing a composition for producing a decorative surface layer comprising a 0.1 to 1 part by weight of the processing lubricant.

According to a preferred feature of the invention, the styrene acrylate copolymer is a styrene ethylene acrylate copolymer, styrene butyl acrylate copolymer, styrene methyl methacrylate copolymer, acrylic styrene acrylate copolymer and acrylic butadiene styrene At least one selected from the group consisting of copolymers is to be included.

According to a more preferred feature of the invention, the polystyrene-based modified elastomer is a styrene butene styrene block copolymer, styrene isoprene copolymer, hydrogenated styrene butadiene elastomer, styrene ethylene crystallin block copolymer, styrene butylene crystal block copolymer, And at least one selected from the group consisting of crystalline ethylene crystalline crystalline block copolymers and crystalline butylene crystalline crystalline block copolymers.

According to a further preferred feature of the present invention, the processing lubricant is one selected from the group consisting of zinc stearate, oleamide, erucamide, ethylene bis stearamide, stearamide and behenamide.

The composition for preparing the decotile surface layer according to the present invention has an excellent effect of showing economical properties, durability, weather resistance, abrasion resistance, and transparency similar or better than polyvinyl chloride.

In addition, it can be applied to both the calendering method and the extrusion tee-die method, and the adhesive layer and the adhesive force is excellent, it shows an excellent effect that can be adhered to the printing layer by the thermocompression bonding method of the hot melt compression method.

In addition, it does not emit carcinogens, endocrine disruptors, etc., and shows an excellent eco-friendly effect.

In the following, preferred embodiments of the present invention and the physical properties of each component will be described in detail, which is intended to explain in detail enough to be able to easily carry out the invention by one of ordinary skill in the art, This does not mean that the technical spirit and scope of the present invention is limited.

The composition for preparing a decotile surface layer according to the present invention is 100 parts by weight of styrene butadiene copolymer, 15 to 35 parts by weight of styrene acrylate copolymer, 20 to 50 parts by weight of polystyrene-based modified elastomer, 0.1 to 1 part by weight of antioxidant, UV stabilizer It comprises 0.2 to 2 parts by weight and 0.1 to 1 part by weight of the processing lubricant.

The styrene butadiene copolymer described above contains 100 parts by weight, and the melt index (ASTM D1238, 200 ° C./5 kg, g / 10 min) is in the range of 5 to 10 suitable for the calendering method or the extrusion tee-die method, and the flexural modulus (ASTM D790). , Mpa) is in the range of 1400 to 1500. If the flexural modulus is less than 1300, the restoring force against external stress is decreased, and if the flexural modulus is less than 1800, the degree of curing is excessively increased, and when the surface layer of the tecotile is formed, the seating property and the adhesion are reduced.

The softening point (ASTM D1525, ℃) of the styrene butadiene copolymer shows a range of 80 to 100 ℃, the embossed decotile in the case of embossed deco tile because the retention of the heat of the tecotile is lowered below 80 ℃ When the sharpness of the film is lowered and exceeds 100 DEG C, a high processing temperature is required when manufacturing the tecotile surface layer, and thus a lot of load is generated on the processing equipment.

The elongation (ASTM D 638,%) of the styrene butadiene copolymer is in the range of 20 to 180%. When the elongation exceeds 200%, shrinkage and expansion with respect to heat are easily generated, which lowers the dimensional stability of the tecotile surface layer. It causes.

The light transmittance of the styrene butadiene copolymer is preferably 85 or more without any inconvenience when visually confirming the printing content of the printed layer. The light transmittance of the styrene butadiene copolymer used in the present invention is 90, indicating that the printed layer of the decotile You can see clearly.

The above-described styrene acrylate copolymer contains 15 to 35 parts by weight, styrene ethylene acrylate copolymer, styrene butyl acrylate copolymer, styrene methyl methacrylate copolymer, acrylic styrene acrylate copolymer and acrylic butadiene styrene It comprises one or more selected from the group consisting of a copolymer, such a styrene acrylate-based copolymer serves to improve the durability, weather resistance, wear resistance and scratch resistance of the decotile surface layer.

The styrene acrylate copolymer has an elongation of 10% or less, a tensile strength of 500 kgf / cm ^2, and a flexural strength of 900 kgf / cm ² .

In addition, the resin flow rate (ASTM D1003) is 1.0 or less, which is a very low level, and is the most suitable level for producing a decotile surface layer.

When the content of the styrene acrylate-based copolymer is less than 15 parts by weight, the flexibility of the surface layer is improved, but the wear resistance and scratch resistance is lowered, and when contained in excess of 35 parts by weight, the flexural modulus increases excessively and the decotile The flexibility of the resin is lowered, the transparency is lowered, and the rolling property is lowered.

The polystyrene-based modified elastomer is contained 20 to 50 parts by weight, styrene butene styrene block copolymer, styrene isoprene copolymer, hydrogenated styrene butadiene elastomer, styrene ethylene crystallin block copolymer, styrene butylene crystal block copolymer, It comprises at least one selected from the group consisting of crystalline ethylene crystalline crystalline block copolymers and crystalline butylene crystalline crystalline block copolymers, which are contained in a composition for producing a decotile surface layer, which imparts impact resistance, flexibility and flexural strength. While playing a role, it is excellent in compatibility with the styrene butadiene copolymer and the styrene acrylate copolymer, and does not impair the transparency of the surface layer.

When the polystyrene-based modified elastomer is contained in less than 20 parts by weight, the impact resistance, flexibility and flexural strength of the surface layer is lowered. When the polystyrene-based modified elastomer is contained in an amount exceeding 50 parts by weight, the transparency and thermal stability of the surface layer are reduced, and the polystyrene-based modified elastomer is Because of its high price, the economy is lowered.

The above-mentioned antioxidants contain 0.1 to 1 parts by weight, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-trimethyl-2, 4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tetrakis- [methylene-3- (3'5'-di-tert-butyl-4-hydroxy Phenyl) propinate], bis [3,3'-bis- (4'-hydroxy-3'-tertiary-butylphenyl) butylic acid] glycol ester, 1,3,5-tris (3 ', 5 '-Di-tertiary-butyl-4'-hydroxybenzyl) -SEC-triazine-2,4,6-trione, 3,5-di-tertiary-butyl-4-hydroxyhydrocinnamate octa Decyl, tris (2,4-di-tert-butylphenyl) phosphate, cyclo neopentanetetrayl bis (2,4-di-tert-butylphenyl) phosphate and 1,2-bis (3,5-di Tertiary-butyl-4-hydroxyhydrocinnamoyl) hydrazine, wherein the antioxidant comprises a decotile surface layer Serves to prevent aging.

The above-mentioned ultraviolet stabilizer contains 0.2 to 2 parts by weight, benzophenone series, phenyl silicate series, bis (2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 2- (3 ', 5 '-Di-tertiary-butyl-2'-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-di-tertiary-phenyl-2-hydroxyphenyl) benzotriazole, 2- (2'-hydroxy-5-methylphenyl) benzotriazole, 2- (3'-tertiary-butyl-2'-hydroxy-5'-methylphenyl) -5-chlorobenzotriazole and hinderedamine ultraviolet light It comprises one or more selected from the group consisting of stabilizers, such UV stabilizers serve to prevent discoloration by improving the light resistance of the surface surface of the decor tile.

The above-mentioned processing lubricant contains 0.1 to 1 parts by weight, and comprises one selected from the group consisting of zinc stearate, oleamide, erucamide, ethylene bis stearamide, stearamide and behenamide. The adhesion of the tecotile surface layer is reduced.

Since the processing lubricant lowers the coefficient of friction between the cylinder of the extruder and the composition of the screw and the decotile surface layer manufacturing process, it induces a smooth extrusion process and prevents the residue from remaining in the cylinder or the screw, thereby lowering the defective rate.

The processing aid composition described above may be utilized as a processing aid in the calender process.

The composition for preparing a decotile surface layer made of the above-described components is first kneaded using a kneader or a mixer, and the first kneaded composition is put into an extruder and extruded while being melt mixed. The extrusion conditions are as follows.

Hopper temperature: room temperature

Cylinder temperature: 160 to 190 ℃

Die temperature: 180 to 210 ° C

Single screw type extruder: L / D = 36/1 or more

Twin screw type extruder: L / D = 26/1 or more

The composition extruded under the aforementioned extrusion conditions is subjected to a water cooling process, cut and pelletized, and dried and stored in pellet form after undergoing oil and water separation.

Hereinafter, the production method and physical property test results of the composition for preparing a decotile surface layer according to the present invention will be described with reference to Examples.

≪ Example 1 >

100 parts by weight of styrene butadiene copolymer, 20 parts by weight of styrene ethylene acrylate copolymer, 40 parts by weight of hydrogenated styrene butadiene elastomer, tetrakis- [methylene-3- (3 ', 5'-di-tertiary-butyl-4) -Hydroxyphenyl) propinate] melt-extruded by mixing 0.2 parts by weight, 0.5 parts by weight of bis- (2,2,6,6, -tetramethyl-4-piperidine sebacate) and 0.5 parts by weight of stearamide, Cool to prepare a decotile surface layer.

<Example 2>

100 parts by weight of styrene butadiene copolymer, 20 parts by weight of styrene methylmethacrylate copolymer, 35 parts by weight of styrene butene styrene block copolymer, tetrakis- [methylene-3- (3'5'-di-tertiary-butyl- 4-hydroxyphenyl) propinate] 0.2 parts by weight, 0.5 parts by weight of a hindered amine UV stabilizer, and 0.5 parts by weight of stearamide were mixed, melt-extruded, and cooled to prepare a decotile surface layer.

Melt index, melting point, softening point, tensile strength, elongation rate and flexural modulus of the tecotile surface layer prepared through Examples 1 and 2 described above are shown in Table 1 below.

TABLE 1

As shown in Table 1 above, the tecotile surface layer prepared with the composition for preparing the tecotile surface layer according to the present invention has excellent melt index, melting point, softening point, tensile strength, elongation rate, and flexural modulus so as to replace polyvinyl chloride. It can be seen that.

In addition, it is excellent in adhesive strength with the printing layer, and does not emit carcinogens or endocrine disrupting substances and the like and is environmentally friendly.

Claims (4)

100 parts by weight of styrene butadiene copolymer, 15 to 35 parts by weight of styrene acrylate copolymer, 20 to 50 parts by weight of polystyrene-based modified elastomer, 0.1 to 1 part by weight of antioxidant, 0.2 to 2 parts by weight of UV stabilizer and 0.1 to about processing lubricant A composition for producing a decotile surface layer, comprising 1 part by weight. The method according to claim 1, The styrene acrylate copolymer is one selected from the group consisting of styrene ethylene acrylate copolymer, styrene butyl acrylate copolymer, styrene methyl methacrylate copolymer, acrylic styrene acrylate copolymer and acrylic butadiene styrene copolymer The composition for manufacturing a decotile surface layer, comprising the above. The method according to claim 1, The polystyrene-based modified elastomer is styrene butene styrene block copolymer, styrene isoprene copolymer, hydrogenated styrene butadiene elastomer, styrene ethylene crystalline crystalline block copolymer, styrene butylene crystalline crystalline block copolymer, crystalline ethylene crystalline crystalline block copolymer And at least one selected from the group consisting of crystalline butylene crystalline crystalline block copolymers. The method according to claim 1, The processing agent is a composition for producing a decotile surface layer, characterized in that consisting of one selected from the group consisting of zinc stearate, oleamide, erucamide, ethylenebis stearamide, stearamide and behenamide.