KR20230057941A - Thermoplastic resin composition, method for preparing the same and article prepared therefrom - Google Patents

Abstract

The present invention relates to a thermoplastic resin composition, a manufacturing method thereof, and a molded product manufactured thereby, and more specifically, to a thermoplastic resin composition, a manufacturing method thereof, and a molded product manufactured thereby, wherein the thermoplastic resin comprises: (A) an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer which comprises a polymer seed containing 70-85 wt% of alkyl (meth)acrylate and 15-30 wt% of aromatic vinyl compound, a rubber core surrounding the polymer seed and containing 78-90 wt% of alkyl acrylate and 10-22 wt% of aromatic vinyl compound, and a graft shell surrounding the rubber core and containing 65-80 wt% of aromatic vinyl compound, 14-25 wt% of vinyl cyan compound and 3-15 wt% of alkyl acrylate; and (B) a non-graft copolymer containing alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound. The thermoplastic resin composition has a thickness and a refractive index of each layer of the (A) graft copolymer properly adjusted. According to the present invention, the present invention provides a thermoplastic resin composition with excellent transparency, glossy properties, weather resistance, and impact resistance, and a manufacturing method thereof, and a molded product manufactured thereby.

Description

Thermoplastic resin composition, manufacturing method thereof, and molded article manufactured therefrom

The present invention relates to a thermoplastic resin composition, a method for preparing the same, and a molded product manufactured therefrom, and more particularly, to a graft copolymer having a structure of a polymer seed, a rubber core surrounding the seed, and a graft shell surrounding the core. A thermoplastic resin composition with excellent transparency, gloss, heat resistance, weather resistance and impact resistance by adjusting the composition and composition ratio of each layer and the morphology of the rubber core, and further adjusting the refractive index difference with the matrix polymer, a method for preparing the same, and a method for preparing the same It's about molding.

Acrylate-styrene-acrylonitrile graft copolymer (hereinafter referred to as 'ASA resin') does not contain unstable double bonds in the polymer and has excellent weatherability, so it is used in electrical and electronic parts and building materials (eg, vinyl siding, etc.) ), extrusion profiles, and automobile parts, etc. Recently, in the field of outdoor products, market demand for high value-added products having properties such as uncoated, transparent, high chroma, and special colors is continuously increasing.

In order to realize transparency in the graft copolymer including the rubber core, the refractive index of the rubber core, the refractive index of the graft shell, and the refractive index of the matrix resin should be close to each other. Furthermore, in the resin composition including the graft copolymer and the matrix resin, the difference between the refractive index of the rubber core and the matrix resin should be small so that light is not refracted or reflected at the interface of the graft copolymer, so that the resin composition is transparent.

ASA resin composed of a butyl acrylate rubber core and a styrene-acrylonitrile copolymer shell has a refractive index of 1.46 for butyl acrylate rubber and a refractive index of 1.56 to 1.58 for styrene-acrylonitrile copolymer. The difference is large, making the resin opaque. In addition, when a styrene-acrylonitrile copolymer (hereinafter referred to as 'SAN resin') is used as a matrix resin in the ASA resin, the refractive index of the SAN resin is 1.56 to 1.58, so there is a difference in refractive index between the core of the ASA resin and the SAN resin. The cursor resin composition is opaque.

Therefore, it is necessary to develop a resin composition with excellent gloss, heat resistance, weather resistance and mechanical properties while realizing transparency by bringing the difference between the refractive index of each of the seed, core, and shell constituting the ASA resin and the refractive index of the matrix resin into close proximity. .

Korean Patent Publication No. 2006-0118156

In order to solve the problems of the prior art as described above, an object of the present invention is to provide a thermoplastic resin composition excellent in all of transparency, glossiness, heat resistance, weather resistance and impact resistance, a manufacturing method thereof, and a molded article manufactured therefrom.

The above and other objects of the present invention can all be achieved by the present invention described below.

In order to achieve the above object, the present invention provides (A) a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, covering the polymer seed and containing 78% by weight of an alkyl acrylate to 90% by weight and 10 to 22% by weight of an aromatic vinyl compound, and 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyanide compound and 3 to 15 alkyl acrylates surrounding the rubber core An alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer comprising a graft shell comprising a weight percent; and (B) a non-grafted copolymer comprising an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound, wherein the (A) graft copolymer is represented by Equation 1 and It provides a thermoplastic resin composition characterized in that it simultaneously satisfies 2.

[Equation 1]

200 ≤ 2*r2 ≤ 300

[Equation 2]

25 ≤ r2 -r1 ≤ 45

(In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.)

In the (A) graft copolymer, the difference between the refractive index of the rubber core and the refractive index of the graft shell (μ _D ²⁵ ) may be 0.08 to 0.09.

Preferably, the difference between the refractive index of the polymer seed of the (A) graft copolymer and the refractive index (μ _D ²⁵ ) of the (B) non-grafted copolymer may be 0.007 or less.

The (A) graft copolymer may preferably include 5 to 35% by weight of the polymer seed, 25 to 55% by weight of the rubber core, and 25 to 55% by weight of the graft shell, based on 100% by weight of the total.

The (B) non-grafted copolymer preferably contains 60 to 90% by weight of an alkyl (meth)acrylate, 3 to 33% by weight of an aromatic vinyl compound, 0.1 to 20% by weight of a vinyl cyan compound, and 0.1 to 20% by weight of an imide compound. % may be included.

In the (B) non-grafted copolymer, the imide-based compound is preferably N-phenylmaleimide, maleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-butylmaleimide, N - It may be at least one selected from the group consisting of isobutyl maleimide, N-cyclohexyl maleimide, and N-benzyl maleimide.

The thermoplastic resin composition may preferably include (A) 10 to 90% by weight of the graft copolymer and (B) 10 to 90% by weight of the non-grafted copolymer.

The thermoplastic resin composition may preferably include (C) an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer having an average rubber core diameter of 50 to 150 nm.

The thermoplastic resin composition is preferably separated into an insoluble sol and a soluble gel by stirring and centrifugation after adding acetone, and the refractive index of the sol and the refractive index of the gel (μ _D ²⁵ ) The difference of may be 0.005 or less.

The thermoplastic resin composition may preferably have a haze of 5% or less as measured by an injection specimen having a thickness of 3 mm according to ASTM D1003.

The thermoplastic resin composition may preferably have a glossiness of 115 or more as measured by an injection specimen having a thickness of 3 mm at 45° according to ASTM D2457.

The thermoplastic resin composition may preferably have an Izod impact strength of 11 kgf·cm/cm or more measured at room temperature using a specimen having a thickness of 1/4" according to ASTM D256.

In addition, the present invention (A) a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, surrounding the polymer seed and 78 to 90% by weight of an alkyl acrylate and an aromatic vinyl compound A rubber core comprising 10 to 22% by weight of a vinyl compound, and 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate surrounding the rubber core an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer including a graft shell; And (B) a non-grafted copolymer comprising an alkyl (meth) acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound; including kneading and extruding under conditions of 180 to 300 ° C. and 80 to 400 rpm. The (A) graft copolymer provides a method for producing a thermoplastic resin composition, characterized in that it simultaneously satisfies Equations 1 and 2 below.

[Equation 1]

200 ≤ 2*r2 ≤ 300

[Equation 2]

25 ≤ r2 -r1 ≤ 45

(In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.)

The kneading and extruding may preferably include (C) an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer having an average rubber core diameter of 50 to 150 nm.

In addition, the present invention provides a molded article comprising the thermoplastic resin composition.

According to the present invention, there is an effect of providing a thermoplastic resin composition excellent in transparency, glossiness, heat resistance, weather resistance and impact resistance, a manufacturing method thereof, and a molded product manufactured therefrom.

In addition, the thermoplastic resin composition of the present invention is applied to automobile interior materials, automobile exterior materials, building materials, home appliances or medical parts requiring high transparency, glossiness, heat resistance and weather resistance, and has the advantage of imparting excellent impact resistance with a beautiful appearance. there is.

Hereinafter, the thermoplastic resin composition of the present disclosure, a manufacturing method thereof, and a molded article manufactured therefrom will be described in detail.

In order to improve the transparency, gloss, heat resistance, weather resistance and impact resistance of the thermoplastic resin composition including the ASA resin and the matrix resin, the present inventors adjusted the composition and composition ratio of the seed, core and shell constituting the ASA resin within a predetermined range. In addition, when the difference in refractive index with the matrix resin is narrowed, the effect of significantly improving transparency, gloss, heat resistance and heat resistance while having excellent impact resistance was confirmed, and based on this, the present invention was completed by further research.

The thermoplastic resin composition of the present invention includes (A) a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, and 78 to 90% by weight of an alkyl acrylate surrounding the polymer seed. and 10 to 22% by weight of an aromatic vinyl compound, and 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate surrounding the rubber core. An alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer comprising a graft shell made of; and (B) a non-grafted copolymer comprising an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound, wherein the (A) graft copolymer is represented by Equation 1 and 2 are simultaneously satisfied, and in this case, transparency, glossiness, heat resistance, weather resistance, and impact resistance are all excellent.

[Equation 1]

200 ≤ 2*r2 ≤ 300

[Equation 2]

25 ≤ r2 -r1 ≤ 45

(In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the polymer seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.)

Hereinafter, the thermoplastic resin composition of the present invention will be described in detail for each component.

(A) Alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer

The (A) graft copolymer is, for example, a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, surrounding the polymer seed and 78 to 90% by weight of an alkyl acrylate % and an aromatic vinyl compound 10 to 22% by weight, and the rubber core is wrapped around an aromatic vinyl compound 65 to 80% by weight, a vinyl cyan compound 14 to 25% by weight and an alkyl acrylate 3 to 15% by weight (B) Compatibility with non-grafted copolymer This has great advantages.

seed

The polymer seed of the (A) graft copolymer is, for example, 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, preferably 70 to 82% by weight of an alkyl (meth)acrylate and an aromatic It may be polymerized by including 18 to 30% by weight of a vinyl compound, more preferably 70 to 80% by weight of an alkyl (meth)acrylate and 20 to 30% by weight of an aromatic vinyl compound. In this case, the difference in refractive index with that of the (B) non-grafted copolymer is reduced, thereby providing excellent transparency, glossiness, and weather resistance.

The (A) polymer seed of the graft copolymer may have an average particle diameter of, for example, 120 to 220 nm, preferably 150 to 190 nm, and within this range, the thermoplastic resin composition finally prepared has excellent impact resistance, fluidity and transparency can be granted.

In the present description, the average particle diameter of the polymer seed, rubber core, and graft shell of the graft copolymer is measured by a measurement method commonly used in the art, including electron microscopy using SEM, TEM, etc. It is not limited, and for example, it can be measured using dynamic light scattering by sampling at the time when polymer seed preparation, rubber core preparation, and graft shell preparation are completed, respectively, and in detail, a particle meter (product name: Nicomp 380, manufacturer: PSS) is used to measure intensity values in Gaussian mode. At this time, as a specific measurement example, the sample is prepared by diluting 0.1 g of latex (TSC 35 ~ 50 wt%) 1,000 to 5,000 times with deionized water or distilled water, that is, appropriately diluted so as not to deviate greatly from the intensity setpoint of 300 kHz, put in a glass tube, and measure. The method is auto-dilution and measured with a flow cell, the measurement mode is dynamic light scattering method / Intensity 300KHz / Intensity-weight Gaussian Analysis, and the setting value is measured at a temperature of 23 ° C and a measurement wavelength of 632.8 nm can do.

The difference between the refractive index of the polymer seed of the (A) graft copolymer and the refractive index (μ _D ²⁵ ) of the (B) non-grafted copolymer is, for example, 0.007 or less, preferably 0.005 or less, and more preferably 0.003 or less. Within this range, there is an advantage in that the impact resistance is excellent while transparency and gloss are implemented.

rubber core

The rubber core of the (A) graft copolymer encloses the polymer seed, for example, and contains 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, preferably 80 to 90% by weight of an alkyl acrylate and an aromatic It can be polymerized by including 10 to 20% by weight of a vinyl compound, more preferably 82 to 88% by weight of an alkyl acrylate and 12 to 18% by weight of an aromatic vinyl compound. It has excellent gloss and weather resistance.

The rubber core may have, for example, an average particle diameter of 200 to 300 nm, preferably 220 to 280 nm, and more preferably 230 to 260 nm, and has excellent impact resistance and excellent physical property balance within this range.

graft shell

The graft shell of the (A) graft copolymer encloses the rubber core and contains, for example, 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate, preferably 67 to 77% by weight of an aromatic vinyl compound, 14 to 22% by weight of a vinyl cyan compound, and 5 to 12% by weight of an alkyl acrylate, more preferably 70 to 75% by weight of an aromatic vinyl compound and 17 to 22% by weight of a vinyl cyan compound , and 5 to 10% by weight of an alkyl acrylate. In this case, as the alkyl acrylate is introduced into the graft shell, (B) it has excellent compatibility with the non-grafted copolymer, excellent balance of physical properties, and excellent transparency, glossiness, and weather resistance.

The difference between the refractive index of the rubber core of the (A) graft copolymer and the refractive index of the graft shell (μ _D ²⁵ ) may be, for example, 0.08 to 0.09, preferably 0.081 to 0.089, more preferably 0.082 to 0.088 Within this range, transparency, gloss, weather resistance and impact resistance are all excellent.

In the present disclosure, aromatic vinyl compounds include, for example, styrene, α-methyl styrene, ο-methyl styrene, ρ-methyl styrene, m-methyl styrene, ethyl styrene, isobutyl styrene, t-butyl styrene, ο-brovo styrene, ρ - may be at least one selected from the group consisting of bromo styrene, m-bromo styrene, ο-chloro styrene, ρ-chloro styrene, m-chloro styrene, vinyltoluene, vinylxylene, fluorostyrene, and vinylnaphthalene; Preferably it may be styrene.

In the present description, the vinyl cyan compound may be, for example, at least one selected from the group consisting of acrylonitrile, methacrylonitrile, ethylacrylonitrile, and isopropylacrylonitrile, and is preferably acrylonitrile.

Alkyl (meth)acrylates herein may be defined to include both alkyl acrylates and alkyl methacrylates.

In the present description, the alkyl acrylate may be, for example, an alkyl acrylate having 1 to 15 carbon atoms in an alkyl group, preferably methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylbutyl acrylate, may be at least one selected from the group consisting of octyl acrylate, 2-ethylhexyl acrylate, hexyl acrylate, heptyl acrylate, n-pentyl acrylate and lauryl acrylate, more preferably an alkyl group having 1 to 4 carbon atoms It may be an alkyl acrylate containing, more preferably n-butyl acrylate, 2-ethylhexyl acrylate, or a mixture thereof.

In the present description, the alkyl methacrylate may be, for example, an alkyl methacrylate having 1 to 15 carbon atoms in an alkyl group, preferably methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylbutyl methacrylate rate, 2-ethylhexyl methacrylate, and may be at least one selected from the group consisting of lauryl methacrylate, more preferably an alkyl methacrylate containing an alkyl group having 1 to 4 carbon atoms, and more preferably may be methyl methacrylate.

(A) graft copolymer

The (A) graft copolymer is, for example, the following Equations 1 and 2 are satisfied at the same time, and in this case, (B) the thickness of the core of the graft copolymer (A) having a large refractive index difference with the non-graft copolymer is reduced, so that the effect of excellent impact resistance and excellent transparency and glossiness is obtained there is.

[Equation 1]

200 ≤ 2*r2 ≤ 300

[Equation 2]

25 ≤ r2 -r1 ≤ 45

In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the polymer seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.

Equation 1 may be preferably 220 ≤ 2*r2 ≤ 280, more preferably 230 ≤ 2*r2 ≤ 260, and excellent impact resistance is effective within this range.

Equation 2 may be preferably 30 ≤ r2-r1 ≤ 40, more preferably 32 ≤ r2-r1 ≤ 37, and excellent transparency is obtained within this range.

The r1 may also be a value obtained by dividing the average particle diameter of the seed by half, and r2 may also be a value obtained by dividing the average particle diameter of the seed-containing core by half.

The r2-r1 denotes the thickness of the rubber core, and as the thickness of the rubber core becomes thinner, light transmits easily, thereby improving transparency.

In the present description, the refractive index of each of the polymer seed, rubber core and graft shell of the graft copolymer and (B) the refractive index of the non-grafted copolymer can be calculated by Equation 3 below.

[Equation 3]

RI = Σ Wti * RIi

Wti = weight fraction (%) of each component in the copolymer

RIi = refractive index of the polymer of each component of the copolymer

In the present description, the refractive index of each component of the copolymer, that is, the polymer of the monomer, may use a value generally known in the art to which the present invention pertains, and for example, methyl methacrylate is 1.49, butyl acrylate is 1.46, and styrene is 1.592. , acrylonitrile may be 1.52.

The (A) graft copolymer may have, for example, a gel content of 70 to 98% by weight, preferably 80 to 95% by weight, more preferably 82 to 92% by weight, and within this range, impact resistance, etc. It has excellent mechanical properties.

The (A) graft copolymer may have, for example, a swelling index of 2.5 to 10, preferably 3 to 6, and more preferably 3.5 to 5, and within this range, it has excellent mechanical properties such as impact resistance and weather resistance. It has an excellent effect.

The (A) graft copolymer may have, for example, a graft rate of 30% or more, preferably 35 to 70%, more preferably 35 to 60%, and within this range, while having excellent mechanical properties such as impact resistance, It has excellent weather resistance.

The gel content, swelling index and graft rate of the present substrate were measured by adding 30 g of acetone to 0.5 g of the graft copolymer powder, stirring at 210 rpm for 12 hours at room temperature (SKC-6075, Lab companion), and centrifuging (Supra R30) , Hanil Science Co., Ltd.) after centrifugation at 0 ℃ at 18,000 rpm for 3 hours to collect only the insoluble matter that was not dissolved in acetone, and then dried by forced circulation at 85 ℃ for 12 hours (OF-12GW, Lab companion Co.) By measuring the weight, it can be obtained by calculating with Equations 4, 5 and 6 below.

[Equation 4]

Gel content (% by weight) = [weight of insoluble content (gel) (g) / sample weight (g)] * 100

[Equation 5]

Swelling index = weight of insoluble matter after centrifugation before drying (g) / weight of insoluble matter after centrifugation and drying (g)

[Equation 6]

Graft rate (%) = [weight of grafted monomer (g) / rubbery weight (g)] * 100

The weight (g) of the grafted monomer in Equation 6 is the weight obtained by subtracting the weight (g) of rubber from the weight (g) of the insoluble material (gel) after dissolving the graft copolymer in acetone and centrifuging, and rubber The weight (g) is the weight (g) of the theoretically added rubbery component in the graft copolymer powder.

The graft copolymer (A) may include, for example, 5 to 35% by weight, preferably 10 to 30% by weight, more preferably 15 to 25% by weight of the polymer seed, based on 100% by weight of the total, Within this range, there is an effect of excellent impact resistance and physical property balance. When the content of the polymer seed is less than the above range, transparency decreases, and when the content exceeds the above range, impact resistance decreases.

The (A) graft copolymer may include, for example, 25 to 55% by weight of the rubber core, preferably 30 to 50% by weight, and more preferably 35 to 45% by weight, based on 100% by weight of the total, Within this range, there is an effect of excellent impact resistance and physical property balance. If the content of the rubber core is less than the above range, the rubber content is reduced, and the impact reinforcing effect as a graft copolymer may be reduced. Compatibility with the raft copolymer is remarkably lowered, and thus, a desired refractive index may not be obtained with a decrease in the impact modifier effect.

The (A) graft copolymer may include, for example, 25 to 55% by weight, preferably 30 to 50% by weight, more preferably 35 to 45% by weight of the graft shell, based on 100% by weight of the total, , There is an effect of excellent impact resistance and physical property balance within this range. When the content of the graft shell is less than the above range, the graft efficiency is reduced and the rubber is agglomerated, thereby reducing the compatibility with the non-grafted copolymer and reducing the impact reinforcing effect, and when the content of the graft shell is excessive, the relative There is a problem that the impact efficiency is lowered due to the decrease in the rubber content.

The core of the rubber component may be, for example, an acrylic rubber polymerized by including an alkyl acrylate, an aromatic vinyl compound, and a crosslinking agent, and when the crosslinking agent is included, the gel content can be controlled and impact resistance is excellent.

The polymer seed, rubber core, or both may be divinylbenzene, 1,3-butanediol diacrylate, 1,3-butanediol dimethacrylate, 1,4-butanediol diacrylate, 1,4-butanediol diacrylate, 1,4-butanediol diacrylate, and the like. Butanediol Dimethacrylate, Aryl Acrylate, Aryl Methacrylate, Trimethylolpropane Triacrylate, Tetraethylene Glycol Diacrylate, Ethylene Glycol Dimethacrylate, Diethylene Glycol Dimethacrylate, Triethylene Glycol Dimethacrylate rate, neopentyl glycol dimethacrylate, triallyl isocyanurate, triarylamine, diallylamine, and at least one selected from the group consisting of a compound represented by Formula 1 below.

[Formula 1]

(In Formula 1, A is independently a substituent having a vinyl group or a (meth)acrylate group, A' is a hydrogen group, a substituent having a vinyl group, an alkyl group having 1 to 30 carbon atoms, an allylalkyl group having 5 to 24 carbon atoms, An arylamine group having 5 to 24 carbon atoms or an allyl group having 6 to 30 carbon atoms, R is independently a divalent ethyl group or propyl group, n is 0 to 15, preferably 0 to 5, more preferably 0 to It is an integer of 4.)

For example, the crosslinking agent is used in an amount of 0.001 to 3 parts by weight, preferably 0.05 to 3 parts by weight, based on 100 parts by weight of the total monomers used in the preparation of each of the polymer seed, rubber core and graft shell of the (A) graft copolymer. 1 part by weight can be used.

In the present description, the content of the monomer in the polymer may mean the weight % of the monomer added during the preparation of the polymer or the weight % of the unit in the polymer in terms of monomer.

The (A) method for preparing the graft copolymer includes, for example, i) preparing a polymer seed by including 70 to 85 wt% of an alkyl (meth)acrylate and 15 to 30 wt% of an aromatic vinyl compound; ii) preparing a rubber core comprising 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound in the presence of the polymer seed; and iii) preparing a graft copolymer by graft polymerization including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate in the presence of the rubber core. In this case, transparency, gloss, weather resistance and impact resistance are excellent.

The method for preparing the (A) graft copolymer is preferably i) a polymer seed including 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, an electrolyte, a crosslinking agent, an initiator and an emulsifier Preparing; ii) preparing a rubber core including 78 to 90% by weight of an alkyl acrylate, 10 to 22% by weight of an aromatic vinyl compound, a crosslinking agent, an initiator and an emulsifier in the presence of the polymer seed; and iii) graft polymerization including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, 3 to 15% by weight of an alkyl acrylate, a crosslinking agent, an initiator and an emulsifier in the presence of the rubber core. A step of preparing a copolymer may be included, and in this case, transparency, gloss, weather resistance and impact resistance are excellent.

In steps i), ii) and iii), the emulsifier is not particularly limited as long as it is an emulsifier commonly used in the technical field to which the present invention pertains, and for example, an alkyl sulfosuccinate metal salt having 12 to 18 carbon atoms or a derivative thereof , C 12 to C 20 alkyl sulfuric acid esters or derivatives thereof, C 12 to C 20 alkyl sulfonic acid metal salts or derivatives thereof, fatty acid soaps, and rosin acid soaps.

The C12-C18 alkyl sulfosuccinate metal salt or its derivative is preferably dicyclohexyl sulfosuccinate, dihexyl sulfosuccinate, di-2-ethylhexyl sulfosuccinate sodium salt, di-2 - It may be at least one selected from the group consisting of ethyl hexyl sulfosuccinate potassium salt, dioctyl sulfosuccinate sodium salt, and dioctyl sulfosuccinate potassium salt.

The alkyl sulfuric ester having 12 to 20 carbon atoms or a derivative thereof, the metal salt of an alkyl sulfonic acid having 12 to 20 carbon atoms or a derivative thereof, preferably contains sodium lauryl sulfate, sodium dodecyl sulfate, sodium dodecyl benzene sulfate, sodium octadecyl sulfate, It may be at least one selected from the group consisting of sodium oleic sulfate, potassium dodecyl sulfate, and potassium octadecyl sulfate.

The fatty acid soap may be preferably one or more selected from the group consisting of oleic acid, stearic acid, lauric acid, and sodium or potassium salts of mixed fatty acids.

The rosin acid soap may preferably be an abietic acid salt.

For example, the emulsifier is 0.01 to 5 parts by weight, preferably 0.1 to 4 parts by weight, based on 100 parts by weight of the total monomers used in the preparation of each of the polymer seed, rubber core and graft shell of the (A) graft copolymer. parts, more preferably 1 to 3 parts by weight.

In the steps i), ii) and iii), the initiator is not particularly limited, but a radical initiator may be preferably used.

The radical initiator may be, for example, at least one selected from the group consisting of inorganic peroxides, organic peroxides, peroxyketal peroxides, peroxycarbonate peroxides, and azo compounds.

The inorganic peroxide may be preferably one or more selected from the group consisting of sodium persulfate, potassium persulfate, ammonium persulfate, potassium persulfate, and hydrogen peroxide.

The organic peroxides include t-butyl peroxide, cumene hydroperoxide, p-mentane hydroperoxide, di-t-butyl peroxide, dicumyl peroxide, t-butylcumyl peroxide, 2,5-dimethyl-2, 5di(t-butyl peroxy)-hexane, di-t-amyl peroxide, 1,1-di(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di( t-butylperoxy)-cyclohexane, 1,1-di(t-amylperoxy)-cyclohexane, ethyl 3,3-di(t-amylperoxy)-butyrate, diisopropylbenzene mono-hydroper oxide, t-amyl hydroperoxide, t-butyl hydroperoxide, t-butyl peroxyneodecanoate, t-butyl peroxypivalate, di-(3,3,5-trimethylhexanoyl)-peroxide , t-butyl peroxy-2-ethylhexanoate, t-butyl peroxy-3,3,5-trimethylhexanoyl, t-amyl peroxy neodecanoate, t-amyl peroxy pivalate, t- Amyl peroxy-2-ethylhexanoate, t-butyl peroxyacetate, t-butyl peroxybenzoate, t-amyl peroxy 2-ethylhexyl carbonate, t-butyl peroxy 2-ethylhexyl carbonate, t- Butyl peroxy isopropyl monocarbonate, t-butyl peroxy maleic acid, cumyl peroxyneodecanoate, 1,1,3,3,-tetramethylbutyl peroxy neodecanoate, 1,1,3,3 ,-tetramethylbutyl peroxy 2-ethylhexanoate, di-2-2ethylhexyl peroxydicarbonate, 3-hydroxy-1,1-dimethylbutylperoxyneodecanoate, acetyl peroxide, isobutyl per oxide, octanoyl peroxide, dibenzoyl peroxide, dilauroyl peroxide, 3,5,5-trimethylhexanol peroxide, and t-butyl peroxy isobutyrate. .

The peroxyketal peroxide is preferably 1,1-di(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di(t-butylperoxy)cyclohexane, 1, The group consisting of 1-di(t-amylperoxy)cyclohexane, ethyl-3,3-di(t-butylperoxy)butylate, and ethyl-3,3-di(t-amylperoxy)butylate It may be one or more selected from.

The peroxycarbonate peroxide is preferably dicumylperoxide, di(t-butylperoxy)-m/p-diisopropylbenzene, 2,5-dimethyl-2,5-(t-butylperoxy) ) dialkyl peroxides such as hexane, t-butylcumyl peroxide, 2,5-methyl-2,5-(t-butylperoxy)hexyne-3, t-butyl peroxy 2-ethylhexyl monocarbonate, and It may be at least one selected from the group consisting of t-butyl peroxybenzoate.

The azo compound is preferably one selected from the group consisting of azobisisobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarbonitrile, and azobisisobutyrate (butyrate)methyl. may be ideal

In at least one of the steps i), ii) and iii), an activator may be used to accelerate the peroxide initiation reaction together with the polymerization initiator.

The activator is not particularly limited if it is an activator commonly used in the art to which the present invention pertains.

The activator may be added in an amount of 0.01 to 3 parts by weight, preferably 0.01 to 1 part by weight, based on 100 parts by weight of the graft copolymer, and a high degree of polymerization can be achieved within this range.

Steps i), ii) and iii) may use, for example, an oxidation-reduction system catalyst in order to further accelerate the initiation reaction together with the initiator.

The oxidation-reduction catalyst may be, for example, at least one selected from the group consisting of sodium pyrophosphate, dextrose, ferrous sulfide, sodium sulfite, sodium formaldehyde sulfoxylate and sodium ethylenediamine tetraacetate, preferably may be a mixture of sodium pyrophosphate, dextrose and ferrous sulfide, but is not limited thereto.

In step i), the electrolyte is, for example, KCl, NaCl, KHCO ₃ , NaHCO ₃ , K _{2 CO 3 , Na 2 CO 3} , KHSO _{3 ,} NaHSO ₄ , Na ₂ S ₂ O ₇ , K ₃ P ₂ O ₇ , K At least one selected from the group consisting of ₃ PO ₄ , Na ₃ PO ₄ , and Na ₂ HPO ₄ may be used, but is not limited thereto.

Step iii) may include, for example, a molecular weight modifier.

The molecular weight modifier may be, for example, 0.01 to 2 parts by weight, preferably 0.05 to 2 parts by weight, more preferably 0.05 to 1 part by weight, based on 100 parts by weight of the total graft copolymer, within this range the desired molecular weight A polymer having a can be easily prepared.

Examples of the molecular weight modifier include α-methylstyrene dimer, t-dodecyl mercaptan, n-dodecyl mercaptan, octyl mercaptan, carbon tetrachloride, methylene chloride, methylene bromide, tetraethyl thiuram disulfide, and dipentamethylene thioate. At least one selected from the group consisting of uram disulfide and diisopropylxantogen disulfide may be used, but is not limited thereto.

In this description, 100 parts by weight of the graft copolymer means 100 parts by weight of the total weight of the finally obtained graft copolymer, or monomers used in the polymer seed, rubber core, and graft shell are conveniently used because almost all of the introduced monomers participate in polymerization It may mean based on 100 parts by weight of the total weight of all or the total weight of the monomers added during the preparation of the polymer seed and rubber core and the monomers added during the manufacture of the graft shell.

The (A) graft copolymer may be prepared by, for example, emulsion polymerization, and in this case, excellent chemical resistance, weather resistance, fluidity, tensile strength and impact strength are obtained.

The emulsion polymerization is not particularly limited when the emulsion polymerization method is commonly performed in the art.

The polymerization temperature during the emulsion polymerization is not particularly limited, but may be carried out at, for example, 50 to 85°C, preferably 60 to 80°C.

The (A) latex of the graft copolymer may be in powder form through conventional processes such as coagulation, washing, and drying, and specifically, coagulation at a temperature of 60 to 100 ° C. by adding a metal salt or acid, It may be prepared in powder form through aging, dehydration, washing and drying processes, but is not limited thereto.

The (A) graft copolymer is, for example, 10 to 90% by weight, preferably 30 to 70% by weight, more preferably 30 to 70% by weight, for example, based on the total weight of (A) graft copolymer and (B) non-grafted copolymer It is preferably 40 to 60% by weight, and within this range, heat resistance, transparency, gloss and impact resistance are all excellent.

(B) a non-graft copolymer comprising an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyan compound and an imide compound

The (B) non-grafted copolymer includes, for example, 60 to 90% by weight of an alkyl (meth)acrylate, 3 to 33% by weight of an aromatic vinyl compound, 0.1 to 20% by weight of a vinyl cyan compound, and 0.1 to 20% by weight of an imide compound. Within this range, compatibility with the (A) graft copolymer is excellent, and heat resistance, weather resistance, transparency, gloss and impact resistance are all excellent.

The (B) non-grafted copolymer preferably contains 65 to 85% by weight of an alkyl (meth)acrylate, 8 to 28% by weight of an aromatic vinyl compound, 0.1 to 15% by weight of a vinyl cyan compound, and 0.5 to 15% by weight of an imide compound. Within this range, compatibility with the (A) graft copolymer is excellent, and heat resistance, weather resistance, transparency, gloss and impact resistance are all excellent.

The (B) non-grafted copolymer more preferably contains 70 to 80% by weight of an alkyl (meth)acrylate, 13 to 23% by weight of an aromatic vinyl compound, 0.1 to 10% by weight of a vinyl cyan compound, and 1 to 11% by weight of an imide compound. %, and within this range, compatibility with the (A) graft copolymer is excellent, and heat resistance, weather resistance, transparency, glossiness, and impact resistance are all excellent.

In the present description, 'non-grafted' means not grafted, and more specifically means not grafted under rubber.

The imide-based compound of the present description is, for example, N-phenylmaleimide, maleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-butylmaleimide, N-isobutylmaleimide, N It is at least one selected from the group consisting of -cyclohexylmaleimide and N-benzylmaleimide, preferably N-phenylmaleimide, and in this case, it has an advantage of excellent heat resistance.

The types of the alkyl (meth)acrylate, aromatic vinyl compound and vinyl cyan compound included in the (B) non-grafted copolymer are the alkyl (meth)acrylate and aromatic vinyl contained in the (A) graft copolymer of the present description It may be within the same category as the type of compound and vinyl cyan compound.

The (B) non-grafted copolymer may have a weight average molecular weight of, for example, 50,000 to 150,000 g/mol, preferably 70,000 to 130,000 g/mol, and more preferably 90,000 g/mol to 120,000 g/mol. There is an effect of excellent impact resistance and moldability within this range.

In the present description, the weight average molecular weight can be measured using GPC (Gel Permeation Chromatography, waters breeze) unless otherwise defined, and as a specific example, GPC (Gel Permeation Chromatography, waters breeze) using THF (tetrahydrofuran) as an eluent. ), it can be measured as a relative value for a standard PS (standard polystyrene) sample. At this time, as a specific measurement example, solvent: THF, column temperature: 40 ℃, flow rate: 0.3ml / min, sample concentration: 20mg / ml, injection amount: 5μl, column model: 1xPLgel 10㎛ MiniMix-B (250x4.6mm) + 1xPLgel 10㎛ MiniMix-B (250x4.6mm) + 1xPLgel 10㎛ MiniMix-B Guard (50x4.6mm), equipment name: Agilent 1200 series system, Refractive index detector: Agilent G1362 RID, RI temperature: 35℃, data processing: Agilent ChemStation S/W, test method (Mn, Mw and PDI): can be measured under OECD TG 118 conditions.

The (B) non-grafted copolymer may have, for example, a glass transition temperature of 110 ° C. or higher, preferably 115 ° C. or higher, more preferably 115 to 130 ° C., measured according to ASTM D3418, in which case the heat resistance It has an improving effect.

In the present substrate, the glass transition temperature may be measured at a heating rate of 10° C./min. using TA Instruments Q100 Differential Scanning Calorimetry (DSC) according to ASTM D3418.

The (B) non-grafted copolymer has, for example, a flow index of 8 g/10 min or more, preferably 10 g/10 min or more, more preferably 10 to 20 It may be g/10min, and within this range, there is an effect of excellent workability.

The (B) non-grafted copolymer may have, for example, a refractive index of 1.5 to 1.525, preferably 1.51 to 1.52, measured at room temperature using an Abbe refractometer according to ASTM D542, and within this range (A ) The difference in refractive index with the seed of the graft copolymer is reduced, resulting in excellent transparency and gloss.

The (B) non-grafted copolymer includes, for example, 60 to 90% by weight of an alkyl (meth)acrylate, 3 to 33% by weight of an aromatic vinyl compound, 0.1 to 20% by weight of a vinyl cyan compound, and 0.1 to 20% by weight of an imide compound. It may be prepared by polymerizing a polymerization solution in which 15 to 40 parts by weight of a reaction solvent and 0.01 to 1 part by weight of an initiator are mixed with 100 parts by weight of a monomer mixture containing.

The reaction solvent may be, for example, at least one selected from the group consisting of ethylbenzene, toluene, methylethylketone, and xylene, and preferably toluene, in which case the viscosity is easily controlled and the polymerization conversion rate is reduced. has a deterrent effect.

The reaction solvent may be, for example, 25 to 40 parts by weight, preferably 30 to 40 parts by weight, based on 100 parts by weight of the monomer mixture, and within this range, the effect of reducing excessive increase in viscosity or decrease in conversion rate and molecular weight is there is.

The initiator used in the preparation of the (B) non-grafted copolymer is, for example, t-butylperoxy-2-ethylhexanoate, benzoyl peroxide, t-butyl Peroxyisobutyrate (t-butylperoxyisobutyrate), 1,1-bis (t-butylperoxy) cyclohexane (1,1-bis (tbutylperoxy) cyclohexane), 2,2-bis (4,4-di-t- Butylperoxycyclohexane)propane (2,2-bis(4,4-di-t-butylperoxy cyclohexane)propane, t-hexyl peroxy isopropyl monocarbonate, t-butyl peroxy Laurate (tbutylperoxylaurate), t-butyl peroxy isopropylmonocarbonate, t-butyl peroxy 2-ethylhexylmonocarbonate, t-hexyl peroxybenzoate (thexylperoxybenzoate), t-butyl peroxyacetate, 2,2-bis(t-butyl peroxy)butane, t-butyl peroxy Benzoate (tbutyl peroxybenzoate), dicumylperoxide, 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane (2,5-dimethyl-2,5-bis (t-butyl peroxy)hexane), t-butyl cumyl peroxide, di-t-butyl peroxide and di-t-amyl peroxide It may be at least one selected from the group consisting of, preferably t-butylperoxy-2-ethylhexanoate (tert-Butylperoxy-2-ethylhexanoate), and in this case, the polymerization reaction is facilitated to improve impact resistance and It has the effect of improving weatherability.

The initiator may be, for example, 0.01 to 1 part by weight, 0.01 to 0.5 parts by weight, preferably 0.01 to 0.4 parts by weight, based on 100 parts by weight of the monomer mixture, and within this range, the polymerization reaction is facilitated to improve mechanical properties and heat resistance. It has the effect of keeping it excellent.

In the polymerization in the step of preparing the (B) non-grafted copolymer, for example, the polymerization solution is continuously introduced into a continuous reactor at a rate of 7 to 20 kg/hr, preferably 10 to 15 kg/hr, at a temperature of 130 to 130 kg/hr. It can be carried out at 160 ° C, preferably 140 to 150 ° C, and in this case, there is an effect of improving mechanical properties and heat resistance by improving the particle stability of the copolymer to make the particle internal structure uniform compared to the case of batch injection.

In the present description, "continuous polymerization" refers to a process in which a material participating in polymerization is continuously supplied into a reactor, a product produced by polymerization is continuously discharged, and unreacted monomers are recovered and reused using a volatilization process. .

The (B) non-grafted copolymer may be prepared by, for example, solution polymerization, bulk polymerization, emulsion polymerization or suspension polymerization, preferably bulk polymerization. The solution polymerization, block polymerization, emulsion polymerization, and suspension polymerization are not particularly limited when each of the polymerization, block polymerization, emulsion polymerization, or suspension polymerization commonly performed in the art to which the present invention pertains.

The (B) non-grafted copolymer is, for example, 10 to 90% by weight, preferably 30 to 70% by weight, more preferably 30 to 70% by weight, based on the total weight of (A) graft copolymer and (B) non-grafted copolymer It is 40 to 60% by weight, and within this range, there are advantages in that heat resistance, transparency, gloss and impact resistance are all excellent.

In the present description, a polymer comprising a certain compound means a polymer polymerized including the compound, and a unit in the polymer is derived from the compound.

(C) an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer having an average rubber core diameter of 50 to 150 nm

The thermoplastic resin composition may include, for example, (C) an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer having an average particle diameter of 50 to 150 nm of the rubber core, and in this case, (B) non-grafted It has excellent compatibility with the copolymer and has the advantage of further improving transparency and glossiness.

The (C) graft copolymer may have, for example, an average particle diameter of 50 to 150 nm, preferably 70 to 130 nm, and more preferably 80 to 110 nm, and has excellent physical property balance and impact resistance within this range. It has an excellent effect.

The (C) graft copolymer is, for example, a rubber core comprising 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, and 65 to 80% by weight of an aromatic vinyl compound surrounding the rubber core, It may be a graft copolymer including a graft shell comprising 14 to 25% by weight of a vinyl cyan compound and 3 to 15% by weight of an alkyl acrylate, in which case (B) compatibility with the non-grafted copolymer is It is excellent and has the advantage of further improving transparency and glossiness.

The (C) graft copolymer is preferably a rubber core comprising 80 to 90% by weight of an alkyl acrylate and 10 to 20% by weight of an aromatic vinyl compound, and 67 to 77% by weight of an aromatic vinyl compound surrounding the rubber core , may include a graft shell comprising 14 to 22% by weight of a vinyl cyan compound and 5 to 12% by weight of an alkyl acrylate, in which case (B) has excellent compatibility with the non-grafted copolymer, transparency and gloss There is an advantage that the degree is further improved.

The (C) graft copolymer is more preferably a rubber core comprising 82 to 88% by weight of an alkyl acrylate and 12 to 18% by weight of an aromatic vinyl compound, and 70 to 75% by weight of an aromatic vinyl compound surrounding the rubber core %, may include a graft shell comprising 17 to 22% by weight of a vinyl cyan compound and 5 to 10% by weight of an alkyl acrylate, and in this case, (B) has excellent compatibility with the non-grafted copolymer, transparency and There is an advantage that the glossiness is further improved.

The (C) graft copolymer comprises, for example, 30 to 60% by weight of a rubber core and 40 to 70% by weight of a graft shell, preferably 35 to 65% by weight of a rubber core and 45 to 55% by weight of a graft shell, more preferably Preferably, 40 to 50% by weight of the rubber core and 50 to 60% by weight of the graft shell may be used, and within this range, there is an advantage in that the mechanical properties are excellent.

The types of the alkyl acrylate, aromatic vinyl compound, and vinyl cyan compound included in the (C) graft copolymer are the alkyl acrylate, aromatic vinyl compound, and vinyl cyan compound included in the graft copolymer (A) of the present description. It may be within the same category as the type.

The (C) method for preparing the graft copolymer includes, for example, i) preparing a rubber core by including 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound; and ii) preparing a graft copolymer by graft polymerization including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate in the presence of the rubber core. It may contain, and in this case, there is an effect of excellent transparency and gloss.

The (C) method for preparing the graft copolymer preferably includes i) preparing a rubber core including 78 to 90% by weight of an alkyl acrylate, 10 to 22% by weight of an aromatic vinyl compound, a crosslinking agent, an initiator and an emulsifier; and iii) graft polymerization including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, 3 to 15% by weight of an alkyl acrylate, a crosslinking agent, an initiator and an emulsifier in the presence of the rubber core. It may include a step of preparing a copolymer, and in this case, there is an effect of excellent transparency and gloss.

The types of crosslinking agent, initiator, and emulsifier used in steps i) and/or ii) may be within the same range as the types of crosslinking agent, initiator, and emulsifier used in the emulsion polymerization step of (A) graft copolymer of the present description. there is.

The total sum of the weights of the (A) graft copolymer and (C) graft copolymer is (A) graft copolymer, (B) non-grafted copolymer and (C) graft copolymer total 100% by weight For example, 10 to 90% by weight, preferably 30 to 70% by weight, more preferably 40 to 60% by weight based on, and within this range, transparency, glossiness and impact resistance are all excellent. .

The weight ratio (A:C) of the graft copolymer (A) and the graft copolymer (C) is, for example, 5:5 to 7:3, preferably 5.5:4.5 to 6.5:3.5, more preferably 5.7 : 4.3 to 6.2 : 3.8, and within this range, transparency, gloss and impact resistance are more excellent.

thermoplastic resin composition

The thermoplastic resin composition is preferably separated into an insoluble sol and a soluble gel by stirring and centrifugation after adding acetone, and the refractive index of the sol and the refractive index of the gel (μ _D ²⁵ ) The difference of may be 0.005 or less, more preferably 0.004 or less, still more preferably 0.003 or less, and even more preferably 0.0001 to 0.003, and within this range, there is an effect of excellent transparency and gloss.

Specifically, the difference in refractive index between the sol and the gel of the thermoplastic resin composition in the present substrate was measured by adding 0.5 g of the thermoplastic resin composition pellet to 30 g of acetone and then stirring at 210 rpm for 12 hours at room temperature (SKC-6075, Lab companion). , It is centrifuged for 3 hours at 0 ° C. and 18,000 rpm with a centrifuge (Supra R30, Hanil Scientific Co.) to separate gel, an insoluble material that is not dissolved in acetone, and sol, a soluble material. After drying at 85 ° C. for 12 hours in a forced circulation method (OF-12GW, Lab companion), the refractive index of each gel and sol is measured according to ASTM D542.

In the present description, the refractive index is specifically measured at room temperature using an Abbe refractometer according to ASTM D542.

The present invention has an effect of providing a resin composition having better transparency and gloss by controlling the difference between the refractive index of the sol and the refractive index of the gel within the above range.

The thermoplastic resin composition preferably has a haze of 5% or less, more preferably 4% or less, still more preferably 3.7% or less, even more preferably, as measured by an injection specimen having a thickness of 3 mm in accordance with ASTM D1003 It is 0.1 to 3.7%, and within this range, all of the physical property balance has an excellent effect.

The thermoplastic resin composition preferably has a haze of 2.5% or less, more preferably 2% or less, still more preferably 1.7% or less, even more preferably, as measured by an extruded specimen having a thickness of 0.15 mm in accordance with ASTM D1003 It is 0.1 to 1.7%, and within this range, all of the physical property balance has an excellent effect.

In this description, the haze is specifically measured according to ASTM D1003 for each of the injection specimen having a thickness of 3 mm and the extrusion specimen having a thickness of 0.15 mm using a haze meter (MURAKAMI, model name: HM-150), and the haze value is small. The better the transparency.

The thermoplastic resin composition preferably has a gloss of 115 or more, more preferably 125 or more, still more preferably 125 to 145, even more preferably, measured at 45 ° with an injection specimen having a thickness of 3 mm according to ASTM D2457 Is 130 to 140, and within this range, there is an effect of excellent physical property balance.

The thermoplastic resin composition preferably has a gloss of 110 or more, more preferably 115 or more, still more preferably 115 to 135, even more preferably, measured at 60 ° with an extruded specimen having a thickness of 0.15 mm according to ASTM D2457 is 118 to 130, and within this range, all of the physical property balances have excellent effects.

The thermoplastic resin composition preferably has an Izod impact strength of 11 kgf cm/cm measured at room temperature with a specimen having a thickness of 1/4" according to ASTM D256 or more, more preferably 12.5 kgf·cm/cm ² or more, and more preferably 12.5 to 15 kgf·cm/cm, and within this range, all of the physical property balances have excellent effects.

The thermoplastic resin composition may preferably have a heat deflection temperature of 92 ° C or higher, more preferably 92 to 100 ° C or higher, and still more preferably 93 to 97 ° C, measured under a load of 18.5 kgf according to ASTM D648. There is an effect of excellent balance of physical properties and heat resistance within.

The thermoplastic resin composition preferably has a Vicat softening temperature (Vicat) measured in accordance with ASTM D1525 under a heating rate of 50 °C/h and a load of 50 N of 100 °C or higher, more preferably 100 to 110 °C, More preferably, it may be 100 to 105 ° C., and within this range, there is an effect of excellent physical property balance and heat resistance.

The thermoplastic resin composition is preferably an accelerated weather resistance tester (Weather-o-meter, ATLAS, Ci4000, xenon arc lamp, Quartz (inner) / S.Boro (outer) filter, irradiance 0.55 W / m ² at 340 nm) After being left for 3,000 hours under SAE J1960 conditions using a color difference meter, the degree of discoloration is measured and the weatherability (ΔE) calculated by Equation 7 below is 2.7 or less, more preferably 2.5 or less, and still more preferably 2.4 or less. , More preferably, it may be 0.1 to 2.4, and within this range, all of the physical property balances have excellent effects.

[Equation 7]

The β is the arithmetic average value of L, a, and b values obtained by measuring the specimens before and after the accelerated weathering test using the CIE LAB color coordinate system, and the closer the ΔE value is to 0, the better the weatherability.

The thermoplastic resin composition may include, for example, at least one selected from the group consisting of a lubricant, an antioxidant, and an ultraviolet absorber.

The lubricant may be, for example, at least one selected from the group consisting of ethylene bis steramide, polyethylene oxide wax, magnesium stearate, calcium steramide, and stearic acid, and in this case, heat resistance and fluidity are improved. .

The lubricant may be 0.01 to 3 parts by weight, preferably 0.05 to 2 parts by weight, based on 100 parts by weight of the total of (A) the graft copolymer and (B) the non-grafted copolymer.

The antioxidant may include, for example, a phenol-based antioxidant, a phosphorus-based antioxidant, or a mixture thereof, and may preferably be a phenol-based antioxidant. In this case, oxidation by heat is prevented during the extrusion process, and mechanical properties and heat resistance are improved. This has an excellent effect.

The antioxidant may be, for example, 0.01 to 3 parts by weight, preferably 0.05 to 2 parts by weight, based on the total 100 parts by weight of (A) the graft copolymer and (B) the non-grafted copolymer, and within this range, the physical properties It has an effect of improving heat resistance while being excellent in balance.

The UV absorber may be, for example, at least one selected from the group consisting of a triazine-based UV absorber, a benzophenone-based UV absorber, a benzotriazole-based UV absorber, a benzoate-based UV absorber, and a cyanoacrylate-based UV absorber, but is limited thereto It is not.

The UV absorber may be, for example, 0.01 to 3 parts by weight, preferably 0.05 to 2 parts by weight, based on 100 parts by weight of the total of (A) the graft copolymer and (B) the non-grafted copolymer, and has excellent physical property balance. There is an effect of improving light fastness.

The thermoplastic resin composition is, for example, a fluorescent whitening agent, an antistatic agent, a chain extender, a release agent, a pigment, a dye, an antibacterial agent, a processing aid, a metal deactivator, a smoke suppressant, an inorganic filler, a glass fiber, a friction agent, and a wear resistance group consisting of It may further include one or more additives selected from.

The additive is, for example, 0.01 to 5 parts by weight, preferably 0.1 to 3 parts by weight, more preferably 0.1 to 1 part by weight, based on 100 parts by weight of the total of (A) graft copolymer and (B) non-grafted copolymer. In this case, the improvement in physical properties is excellent and the manufacturing cost is low, so there is an effect of excellent economic feasibility.

Hereinafter, a method for preparing the thermoplastic resin composition of the present invention and a molded article containing the composition will be described. In describing the manufacturing method of the thermoplastic resin composition of the present invention and the molded article containing the composition, all the contents of the thermoplastic resin composition described above are included.

Manufacturing method of thermoplastic resin composition

A method for producing the thermoplastic resin composition of the present disclosure includes (A) a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound; A rubber core comprising 90% by weight and 10 to 22% by weight of an aromatic vinyl compound, and 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate surrounding the rubber core An alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer comprising a graft shell comprising %; And (B) a non-grafted copolymer comprising an alkyl (meth) acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound; including kneading and extruding under conditions of 180 to 300 ° C. and 80 to 400 rpm. However, the (A) graft copolymer is characterized in that it simultaneously satisfies the following Equations 1 and 2, and in this case, it has excellent heat resistance, transparency, gloss and impact resistance.

[Equation 1]

200 ≤ 2*r2 ≤ 300

[Equation 2]

25 ≤ r2-r1 ≤ 45

(In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.)

The kneading and extruding step may include, for example, (C) an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer having an average particle diameter of 50 to 150 nm in the rubber core, and preferably (C) average A rubber core having a particle size of 50 to 150 nm and containing 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, and 65 to 80% by weight of an aromatic vinyl compound and 14 to 80% by weight of a vinyl cyanide compound wrapped around the rubber core It may include an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer including a graft shell comprising 25% by weight and 3 to 15% by weight of an alkyl acrylate, and in this case, transparency, gloss and It has the effect of significantly improving weatherability.

The kneading and extrusion may be performed, for example, through a single-screw extruder, a twin-screw extruder, or a Banbury mixer, and in this case, the composition is uniformly dispersed, resulting in excellent compatibility.

The kneading and extruding may be carried out, for example, at a barrel temperature of 180 to 300 ° C, preferably 190 to 280 ° C, more preferably 200 to 260 ° C, and in this case, melt kneading at an appropriate and sufficient throughput per unit time This may be possible, and there is an effect of not causing problems such as thermal decomposition of the resin component.

The kneading and extruding may be performed, for example, under the condition that the number of rotations of the screw is 80 to 400 rpm, preferably 100 to 300 rpm, and more preferably 150 to 250 rpm. It has an excellent effect.

The thermoplastic resin composition obtained through the extrusion may be made into pellets using, for example, a pelletizer.

Furthermore, the resin composition may be manufactured into molded articles in various industrial fields through molding processes such as a blow process and an injection process.

molding

The molded article of the present substrate may include, for example, the thermoplastic resin composition of the present substrate, and has excellent heat resistance, weather resistance, transparency, gloss and impact resistance, so that it can be applied with high quality to fields requiring transparency.

The molded product may be, for example, an injection molded product, a film or a sheet, and in this case, the thermoplastic resin composition of the present substrate has the advantage of being able to provide a higher quality than the quality of heat resistance, weather resistance, impact resistance, transparency and gloss required by the market. .

The molded article may be, for example, an automobile interior material, an automobile exterior material, a building material, a home appliance, or a medical part. There is an advantage.

The manufacturing method of the molded article is preferably (A) a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, and wrapping the polymer seed with 78 to 90% by weight of an alkyl acrylate A rubber core comprising 10 to 22% by weight and an aromatic vinyl compound, and 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate surrounding the rubber core An alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer comprising a graft shell comprising; And (B) a non-grafted copolymer comprising an alkyl (meth) acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound; making pellets; and injecting or extruding the prepared pellets using an extruder or an extruder, wherein the (A) graft copolymer simultaneously satisfies Equations 1 and 2 below, and in this case, transparency and gloss It is excellent in heat resistance, heat resistance, weather resistance and impact resistance, so it can be applied with high quality to areas requiring transparency.

[Equation 1]

200 ≤ 2*r2 ≤ 300

[Equation 2]

25 ≤ r2-r1 ≤ 45

(In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.)

Hereinafter, preferred embodiments are presented to aid understanding of the present invention, but the following examples are merely illustrative of the present invention, and various changes and modifications are possible within the scope and spirit of the present invention. It is obvious to those skilled in the art, It goes without saying that these variations and modifications fall within the scope of the appended claims.

[Example]

Materials used in Examples and Comparative Examples are as follows.

* (A) Graft Copolymer: Prepared in Examples 1 to 10 and Comparative Examples 1 to 11 below

* (B-1) PMI-T-SAN copolymer (Phenyl maleimide-Transparency-Styrene-Acrylonitrile copolymer): 75% by weight of methyl methacrylate, 18% by weight of styrene, 1% by weight of acrylonitrile, and N-phenylmaley A non-grafted copolymer comprising 6% by weight of mead (weight average molecular weight: 100,000 g/mol, Tg: 120° C.)

* (B-2) SAMMA copolymer: non-grafted copolymer comprising 71% by weight of methyl methacrylate, 22% by weight of styrene and 7% by weight of acrylonitrile

* (C) Graft Copolymer: A rubber core comprising 85% by weight of butyl acrylate and 15% by weight of styrene and having an average particle diameter of 90 mm, and 72% by weight of styrene, 20% by weight of acrylonitrile and Graft copolymer comprising a graft shell consisting of 8% by weight of butyl acrylate (45% by weight rubber core and 55% by weight graft shell)

* Lubricant: SUNLUBE EBS (Seonpione)

* Antioxidants: Songnox 1076 (Songwon) and Irgafos 168 (BASF)

* UV absorber: Tinuvin 770 (BASF Company), Tinuvin P (BASF Company)

Example 1

As a polymer seed, methyl methacrylate (hereinafter referred to as 'MMA') and styrene (hereinafter referred to as 'SM') were included in a weight ratio of 72/28, and butyl acrylate (hereinafter referred to as 'BA') was used as a rubber core. ) and SM in a weight ratio of 85/15, and (A) acrylate- A styrene-acrylonitrile graft copolymer was prepared. In this case, (A) the graft copolymer was composed of 20% by weight of the polymer seed, 40% by weight of the rubber core, and 40% by weight of the graft shell.

50 parts by weight of the prepared (A) graft copolymer and 50 parts by weight of the non-grafted copolymer (B) were mixed with 1 part by weight of a lubricant, 1 part by weight of an antioxidant, and 0.6 part by weight of a UV absorber and kneaded at 220 ° C. and 200 rpm and extruded to produce pellets. The prepared pellets were injected at a molding temperature of 220 ° C to produce an injection specimen for measuring physical properties, and also extruded with a single-screw film extruder under the conditions of 220 ° C and 200 rpm with the prepared pellets to produce an extruded specimen for measuring physical properties.

Examples 2 to 8

In Example 1, the (A) graft copolymer was polymerized with the components and contents listed in Tables 1 and 2, and the same procedure as in Example 1 was performed except for changing .

Example 9

Example 7, except that 50 parts by weight of (A) graft copolymer prepared in Example 7 was changed to 30 parts by weight of (A) graft copolymer and (C) 20 parts by weight of graft copolymer. It was carried out in the same way as in 7.

Example 10

Example 7, except that 50 parts by weight of (A) graft copolymer prepared in Example 7 was changed to 35 parts by weight of (A) graft copolymer and 15 parts by weight of (C) graft copolymer. It was carried out in the same way as in 7.

Comparative Examples 1 to 10

In Example 1, (A) ASA graft copolymer, the same as in Example 1 except for changing to (A) ASA graft copolymer polymerized with the components and contents shown in Tables 3 to 4 below. conducted.

Comparative Example 11

Example 5 was carried out in the same manner as in Example 5, except that (B-1) PMI-T-SAN copolymer was changed to (B-2) SAMMA copolymer.

Comparative Example 12

A transparent acrylonitrile-butadiene-styrene resin (LG Chemical Co., TR557) was injected to prepare an injection specimen for measuring physical properties.

[Test Example]

The properties of the pellets and specimens prepared in Examples 1 to 10 and Comparative Examples 1 to 12 were measured by the following method, and the results are shown in Tables 1 to 4 below.

* The refractive index of the seed, the rubber core, and the graft shell of the graft copolymer and the refractive index of the non-grafted copolymer: calculated by Equation 3 below.

[Equation 3]

RI = Σ Wti * RIi

Wti = weight fraction (%) of each component in the copolymer

RIi = refractive index of the polymer of each component of the copolymer

* Average particle diameter (nm) of polymer seed, rubber core, and graft shell: Sampled at the time when polymer seed preparation, rubber core preparation, and graft shell preparation were completed, respectively, and measured using dynamic light scattering. In detail, it was measured as an intensity value in Gaussian mode using a particle meter (product name: Nicomp 380, manufacturer: PSS). At this time, as a specific measurement example, 0.1 g of latex having a total solid content of 35 to 50% by weight is prepared by diluting 1,000 to 5,000 times with distilled water as a sample, and the measurement method is auto-dilution and measured by a flow cell, and the measurement mode is dynamic light scattering. Method (Dynamic light scattering) method / Intensity 300KHz / Intensity-weight Gaussian Analysis was used, and the setting value was measured at a temperature of 23 ° C. and a measurement wavelength of 632.8 nm.

For reference, r1 was measured by dividing the average particle diameter of the seed by half, and r2 was measured by dividing the average particle diameter of the seed-containing core by half.

* Izod impact strength (IMP; kgf cm/cm): Measured at room temperature with an injection specimen having a thickness of 1/4" according to ASTM D256.

* Haze (%): Haze was measured according to ASTM D1003 for each of the 3 mm thick injection specimen and the 0.15 mm thick extruded specimen. The lower the haze, the better the transparency.

* Gloss of injection specimen: Gloss was measured at 45° with an injection specimen having a thickness of 3 mm in accordance with ASTM D2457.

* Gloss of the extruded specimen: measured at 60 ° with an extruded specimen having a thickness of 0.15 mm in accordance with ASTM D2457.

* Difference in refractive index between sol and gel in thermoplastic resin composition: After adding 30 g of acetone to 0.5 g of thermoplastic resin composition pellets, stirring at 210 rpm for 12 hours at room temperature (SKC-6075, Lab companion Co.) Then, it was centrifuged for 3 hours at 0 ° C. and 18,000 rpm using a centrifuge (Supra R30, Hanil Scientific Co.) to separate a gel, which is an insoluble material that is not dissolved in acetone, and a sol, which is a soluble material. After drying them at 85℃ for 12 hours in a forced circulation method (OF-12GW, Lab companion company), each refractive index is measured at room temperature using an Abbe refractometer in accordance with ASTM D542, and the difference between them is calculated did

* Heat deflection temperature (HDT, ℃): measured under a load of 18.5 kgf according to ASTM D648.

* Vicat softening point temperature (Vicat, °C): Measured under a heating rate of 50 °C/h and a load of 50 N in accordance with ASTM D1525.

* Weatherability (ΔE ): Accelerated weatherability tester (Weather-o-meter, ATLAS, Ci4000, xenon arc lamp, Quartz (inner)/S.Boro (outer) filter, irradiance 0.55 W/m ² at 340 nm) After leaving it for 3,000 hours under SAE J1960 conditions using a color difference meter, the degree of discoloration was measured and ΔE was calculated by Equation 7 below. The following ΔE is the arithmetic average value of L, a, and b values measured using the CIE LAB color coordinate system for specimens before and after the accelerated weathering test, and the closer the ΔE value is to 0, the better the weatherability.

[Equation 7]

In Equation 7, L', a', and b' are L, a, and b values respectively measured by the CIE LAB color coordinate system after leaving the specimen for 3,000 hours under SAE J1960 conditions, and L ₀ , a ₀ , b ₀ is the L, a, and b values respectively measured in the CIE LAB color coordinate system before leaving.

division Example 1 Example 2 Example 3 Example 4 (A)
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sifter seed MMA/SM
(weight%) 72/28 72/28 72/28 72/28 core BA/SM
(weight%) 85/15 85/15 85/15 85/15 shell SM/AN/BA
(weight%) 76/16/8 71/18/11 71/24/5 68/22/10 2*r2 (nm) 240 240 240 240 r2-r1 (nm) 35 35 35 35 the refractive index of the core and
Difference from the refractive index of the shell 0.089 0.083 0.087 0.082 Thermoplastic resin composition (A) Graft
Copolymer (% by weight) 50 50 50 50 (B-1) PMI-T-SAN
Copolymer (% by weight) 50 50 50 50 (C) Graft
Copolymer (% by weight) - - - - (A) of the graft copolymer
Seed's refractive index and
(B) of the non-grafted copolymer
Difference from refractive index 0.004 0.004 0.004 0.004 injection specimen Haze (%) 4.7 4.3 4.4 4.6 impact strength
(kgf cm/cm) 12 13 11 13 Glossiness 126 122 128 123 HDT (℃) 93.3 92.1 94 92.5 Vicat(℃) 101.3 100.5 102.4 100.8 Weather resistance (ΔE) 2.6 2.3 2.5 2.4 extrusion specimen Haze (%) 2.3 2.2 2.4 2.2 Glossiness 120 115 121 117 In the thermoplastic resin composition
Difference in refractive index between sol and gel 0.0038 0.0023 0.0033 0.0028

division Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 (A)
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sifter seed MMA/SM
(weight%) 72/28 76/24 78/22 82/18 78/22 78/22 core BA/SM
(weight%) 85/15 87/13 85/15 85/15 85/15 85/15 shell SM/AN/BA
(weight%) 72/20/8 72/20/8 72/20/8 72/20/8 72/20/8 72/20/8 2*r2 (nm) 240 240 240 240 240 240 r2-r1 (nm) 35 35 35 35 35 35 The difference between the refractive index of the core and the refractive index of the shell 0.086 0.088 0.086 0.086 0.086 0.086 Thermoplastic resin composition (A) Graft
Copolymer (% by weight) 50 50 50 50 30 35 (B-1) PMI-T-SAN
Copolymer (% by weight) 50 50 50 50 50 50 (C) Graft
Copolymer (% by weight) - - - - 20 15 (A) of the graft copolymer
Seed's refractive index and
(B) of the non-grafted copolymer
Difference from refractive index 0.004 0.000 0.002 0.006 0.002 0.002 injection specimen Haze (%) 4 3.8 3.6 3.8 2.5 2.7 impact strength
(kgf cm/cm) 12 14 13 13 13 12 Glossiness 125 129 130 132 131 133 HDT (℃) 93.1 92.9 93.2 93 93 93.1 Vicat(℃) 101.2 100.9 101.1 101.5 100.9 101.1 Weather resistance (ΔE) 2.3 2.6 2.4 2.4 2.1 2.2 extrusion specimen Haze (%) 2.1 2 1.7 1.6 1.4 1.5 Glossiness 118 119 119 122 120 121 In the thermoplastic resin composition
Difference in refractive index between sol and gel 0.0019 0.0027 0.0029 0.0031 0.0026 0.0028

division Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 (A)
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sifter seed MMA/SM
(weight%) 92/8 68/32 72/28 72/28 72/28 72/28 core BA/SM
(weight%) 85/15 85/15 95/5 70/30 85/15 85/15 shell SM/AN/BA
(weight%) 72/20/8 72/20/8 72/20/8 72/20/8 72/8/20 75/25/0 2*r2 (nm) 240 240 240 240 240 240 r2-r1 (nm) 35 35 35 35 35 35 The difference between the refractive index of the core and the refractive index of the shell 0.086 0.086 0.099 0.066 0.079 0.093 Thermoplastic resin composition (A) Graft
Copolymer (% by weight) 50 50 50 50 50 50 (B-1) PMI-T-SAN
Copolymer (% by weight) 50 50 50 50 50 50 (C) Graft
Copolymer (% by weight) (A) of the graft copolymer
Seed's refractive index and
(B) of the non-grafted copolymer
Difference from refractive index 0.016 0.008 0.004 0.004 0.004 0.004 injection specimen Haze (%) 40.5 17.2 55.3 30.7 46.2 20.9 impact strength
(kgf cm/cm) 6 8 15 4 5 11 Glossiness 90 93 85 87 79 94 HDT (℃) 93.5 93.1 92.5 93.6 90.9 95.1 Vicat(℃) 102 101.1 100.7 102.1 100.1 103.4 Weather resistance (ΔE) 2.5 2.3 2.4 2.1 2.7 2.6 extrusion specimen Haze (%) 5.3 4.1 6.6 4.3 5.5 4.5 Glossiness 89 90 85 83 70 88 In the thermoplastic resin composition
Difference in refractive index between sol and gel 0.0070 0.0087 0.0131 0.0082 0.0129 0.0136

division Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Comparative Example 11 Comparative Example 12 (A)
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sifter seed MMA/SM
(weight%) 72/28 72/28 0/100 100/0 72/28 - core BA/SM
(weight%) 85/15 85/15 100/0 81/19 85/15 - shell SM/AN/BA (% by weight) 72/20/8 72/20/8 75/25/0 100 (MMA) 72/20/8 - 2*r2 (nm) 360 160 230 240 240 - r2-r1 (nm) 52 23 40 35 35 - The difference between the refractive index of the core and the refractive index of the shell 0.086 0.086 0.112 0.005 0.086 - Thermoplastic resin composition (A) Graft
Copolymer (% by weight) 50 50 50 50 50 - (B-1) PMI-T-SAN
Copolymer (% by weight) 50 50 50 50 - - (B-2) SAMMA copolymer (% by weight) - - - - 50 - (C) Graft
Copolymer (% by weight) - - - - - - (A) the refractive index of the seed of the graft copolymer and
(B) of the non-grafted copolymer
Difference from refractive index 0.004 0.004 0.076 0.024 0.004 - injection specimen Haze (%) 23.5 2.1 71.4 45.1 4.2 2 impact strength
(kgf cm/cm) 15 3 16 5 13 17 Glossiness 92 133 82 90 129 150 HDT (℃) 92.7 93.4 94.8 95.3 80.5 81 Vicat(℃) 101.2 101.8 103 103.5 92.3 89 Weather resistance (ΔE) 2.9 2.3 2.8 2.3 2.5 8.8 extrusion specimen Haze (%) 5.1 1.3 5.4 4.1 2.1 - glossiness 87 119 85 86 125 - In the thermoplastic resin composition
Difference in refractive index between sol and gel 0.0037 0.0013 0.0100 0.0245 0.0018 -

As shown in Tables 1 to 4, the thermoplastic resin compositions (Examples 1 to 10) according to the present invention have a heat deflection temperature and a Vicat softening point temperature equal to or higher than those of Comparative Examples 1 to 12, and impact strength, haze, gloss It was confirmed that both the coating and weather resistance were excellent. Here, Examples 9 and 10 including (A) the graft copolymer and (C) the graft copolymer were superior in haze and glossiness.

On the other hand, (A) Comparative Examples 1 and 2, in which the composition ratio of the polymer seed of the graft copolymer was outside the range of the present invention, the difference in refractive index between the sol and the gel in the thermoplastic resin composition increased, resulting in haze and gloss in both the extruded and extruded specimens. and impact strength was lowered.

In addition, (A) Comparative Examples 3 and 4, in which the configuration of the rubber core of the graft copolymer is out of the scope of the present invention, (A) the difference in refractive index between the rubber core and the shell of the graft copolymer is outside the range of 0.8 to 0.9 and is a thermoplastic resin In the composition, the difference in refractive index between the sol and the gel increased, so that the haze and glossiness of both the injected and extruded specimens decreased, and in particular, Comparative Example 4 had very low impact strength.

In addition, in Comparative Examples 5 and 6, in which the configuration of the graft shell of (A) the graft copolymer is outside the scope of the present invention, the difference in refractive index between the rubber core and the shell of (A) the graft copolymer is outside the range of 0.8 to 0.9, and the thermoplastic In the resin composition, the difference in refractive index between the sol and the gel was large, so both the injected specimen and the extruded specimen had poor haze and gloss, and Comparative Example 5 had low impact strength.

In addition, (A) Comparative Example 7 in which 2*r2 and r2-r1 of the rubber core of the graft copolymer exceeded the scope of the present invention was poor in haze, gloss and weather resistance, and (A) of the graft copolymer Comparative Example 8 in which 2*r2 and r2-r1 of the rubber core were less than the range of the present invention had very poor impact strength.

In addition, in Comparative Example 9, which contained only styrene in the seed and only butyl acrylate in the rubber core, as in the prior art, (A) the difference between the refractive index of the rubber core and the refractive index of the shell of the graft copolymer is outside the range of 0.8 to 0.9 The difference in refractive index between (A) the polymer seed of the graft copolymer and (B) the non-grafted copolymer and the difference in refractive index between the sol and the gel in the thermoplastic resin composition increased, resulting in lower haze, gloss and weather resistance.

In addition, Comparative Example 10 including only methyl methacrylate in each of the seed and the shell is outside the range of 0.8 to 0.9 between the refractive index of the rubber core and the refractive index of the shell of (A) the graft copolymer and (A) the graft copolymer The difference in refractive index between the polymer seed and (B) the non-grafted copolymer increased, and haze, gloss, and impact strength all decreased.

In Comparative Example 11 in which the (B-1) PMI-T-SAN copolymer was changed to the (B-2) SAMMA copolymer, the heat deflection temperature and Vicat softening point were lowered, resulting in lower heat resistance.

In addition, Comparative Example 12, which was tested with a transparent acrylonitrile-butadiene-styrene resin, had very poor weather resistance.

In conclusion, according to the present invention, (A) the composition and composition ratio of the polymer seed, core, and shell constituting the alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer are adjusted within a predetermined range, and further, the core When narrowing the difference between the refractive index of the cell and the refractive index of the cell, and (A) the refractive index of the polymer seed of the graft copolymer and (B) the refractive index of the non-grafted copolymer, transparency, gloss, It was confirmed that the effect of excellent heat resistance and weather resistance was confirmed.

Claims (15)

(A) a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, covering the polymer seed and containing 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound; Including a rubber core comprising a weight %, and a graft shell surrounding the rubber core and containing 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer; and
(B) a non-grafted copolymer comprising an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound;
The (A) graft copolymer is characterized in that it simultaneously satisfies the following Equations 1 and 2
Thermoplastic resin composition.
[Equation 1]
200 ≤ 2*r2 ≤ 300
[Equation 2]
25 ≤ r2 -r1 ≤ 45
(In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.)
According to claim 1,
The (A) graft copolymer is characterized in that the difference between the refractive index of the rubber core and the refractive index of the graft shell (μ _D ²⁵ ) is 0.08 to 0.09
Thermoplastic resin composition.
According to claim 1,
The refractive index of the polymer seed of the (A) graft copolymer is characterized in that the difference from the refractive index (μ _D ²⁵ ) of the (B) non-grafted copolymer is 0.007 or less
Thermoplastic resin composition.
According to claim 1,
The (A) graft copolymer comprises 5 to 35% by weight of a polymer seed, 25 to 55% by weight of a rubber core and 25 to 55% by weight of a graft shell, based on a total of 100% by weight thereof
Thermoplastic resin composition.
According to claim 1,
The (B) non-grafted copolymer includes 60 to 90% by weight of an alkyl (meth)acrylate, 3 to 33% by weight of an aromatic vinyl compound, 0.1 to 20% by weight of a vinyl cyan compound, and 0.1 to 20% by weight of an imide compound. characterized in that made by
Thermoplastic resin composition.
According to claim 1,
In the (B) non-grafted copolymer, the imide-based compound is N-phenylmaleimide, maleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-butylmaleimide, N-isobutyl Characterized in that at least one selected from the group consisting of maleimide, N-cyclohexylmaleimide, and N-benzylmaleimide
Thermoplastic resin composition.
According to claim 1,
The thermoplastic resin composition is characterized in that it comprises (A) 10 to 90% by weight of the graft copolymer and (B) 10 to 90% by weight of the non-grafted copolymer
Thermoplastic resin composition.
According to claim 1,
The thermoplastic resin composition (C) characterized in that it comprises an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer having an average particle diameter of 50 to 150 nm of the rubber core
Thermoplastic resin composition.
According to claim 1,
The thermoplastic resin composition was separated into insoluble sol and soluble gel by stirring and centrifugation after adding acetone, and the difference between the refractive index of the sol and the refractive index of the gel (μ _D ²⁵ ) was measured. characterized in that less than 0.005
Thermoplastic resin composition.
According to claim 1,
Characterized in that the thermoplastic resin composition has a haze of 5% or less as measured by an injection specimen having a thickness of 3 mm in accordance with ASTM D1003
Thermoplastic resin composition.
According to claim 1,
Characterized in that the thermoplastic resin composition has a glossiness of 115 or more as measured by an injection specimen having a thickness of 3 mm at 45 ° in accordance with ASTM D2457
Thermoplastic resin composition.
According to claim 1,
Characterized in that the thermoplastic resin composition has an Izod impact strength of 11 kgf cm / cm or more measured at room temperature with a specimen having a thickness of 1/4 "in accordance with ASTM D256
Thermoplastic resin composition.
(A) a polymer seed comprising 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, covering the polymer seed and containing 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound; Including a rubber core comprising a weight %, and a graft shell surrounding the rubber core and containing 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyan compound, and 3 to 15% by weight of an alkyl acrylate an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer; And (B) a non-grafted copolymer comprising an alkyl (meth) acrylate, an aromatic vinyl compound, a vinyl cyan compound, and an imide-based compound; including kneading and extruding under conditions of 180 to 300 ° C. and 80 to 400 rpm. Including steps,
The (A) graft copolymer is characterized in that it simultaneously satisfies the following Equations 1 and 2
A method for producing a thermoplastic resin composition.
[Equation 1]
200 ≤ 2*r2 ≤ 300
[Equation 2]
25 ≤ r2 -r1 ≤ 45
(In Equations 1 and 2, r1 is the average radius (nm) from the center of the graft copolymer to the seed, and r2 is the average radius (nm) from the center of the graft copolymer to the core.)
According to claim 13
The kneading and extruding step comprises (C) an alkyl acrylate-aromatic vinyl compound-vinyl cyan compound graft copolymer having an average particle diameter of 50 to 150 nm of the rubber core.
A method for producing a thermoplastic resin composition.
Characterized in that it comprises the thermoplastic resin composition of any one of claims 1 to 12
molding.