KR101492032B1 - Heat-Resistant ABS Resin Composition With Excellent Processability and Resistance for Discoloration at High Temperature and Method for Preparing the Same - Google Patents

Abstract

The heat-resistant ABS resin composition according to the present invention comprises (A) 15 to 40% by weight of a rubber-modified graft copolymer obtained by graft-polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer onto a rubbery polymer; (B) 5 to 60% by weight of a vinyl copolymer obtained by polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer; And (C) from 15 to 65% by weight of a terpolymer obtained by polymerizing 40 to 70% by weight of an alpha alkyl styrene, 20 to 40% by weight of a vinyl cyan monomer, and 10 to 30% by weight of styrene. Further, the heat-resistant ABS resin composition does not substantially contain an inorganic filler, an imide copolymer or both.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant ABS resin composition excellent in workability and discoloration resistance at high temperatures and a method for producing the ABS resin composition.

The present invention relates to a heat-resistant ABS resin composition excellent in workability and discoloration resistance at high temperatures and a method for producing the same. More particularly, the present invention relates to a heat-resistant ABS resin composition including an alpha-alkylstyrene-acrylonitrile-styrene terpolymer and excellent in workability and discoloration resistance at high temperatures, and a method for producing the same.

In general, acrylonitrile-butadiene-styrene (ABS) resin is excellent in workability due to styrene, styrene-acrylonitrile-based styrene-butadiene-styrene (ABS) resin is excellent in stiffness and chemical resistance, butadiene is excellent in impact resistance, And is widely used in electric and electronic parts, household appliances, toys, and office equipment.

However, the ABS resin has a limit to be used in applications such as automobile interior materials requiring heat resistance because of low heat resistance. As a method for improving the heat resistance of the ABS resin, a method of replacing a part of components constituting the resin with a heat-resistant copolymer containing a styrene-based monomer having excellent heat resistance, an imide-based monomer or the like, or adding an inorganic filler .

Although the method of adding the inorganic filler has an effect of improving the heat resistance, it has poor compatibility with a polymer resin and dispersibility, and has a problem of deteriorating mechanical properties such as impact strength, flexural strength and tensile strength of an ABS resin.

Although the method using the imide monomer has an excellent effect of improving the heat resistance, the compatibility with the SAN constituting the matrix of the ABS resin is deteriorated and the mechanical properties are deteriorated, and the color of the ABS resin such as the yellowness degree, whiteness degree, And the characteristics are significantly lowered.

On the other hand, the method using the styrene-based monomer having excellent heat resistance has a relatively small heat resistance increase effect as compared with the above-mentioned other methods, but it is widely used commercially because it maintains good balance of physical properties of the ABS resin. Of these,? -Methylstyrene is widely used commercially because of its excellent balance of physical properties with respect to price, and research on a method for producing a heat-resistant copolymer using? -Methylstyrene has been extensively studied.

In the process for producing a copolymer containing? -Methylstyrene, an emulsion polymerization method of a batch process is generally used because of the convenience of the process, but the conversion ratio is low and the unreacted monomer content in the resulting copolymer resin is generally high . These unreacted monomer residues degrade the heat resistance and other physical properties of the heat-resistant ABS, which is the final product, and since? -Methylstyrene is decomposed well at high temperatures, it is difficult to extrude at high temperatures, bad smell during injection molding, And has a problem of degrading color characteristics such as yellow color.

In order to solve the problems of the emulsion polymerization method described above, continuous bulk polymerization may be used as disclosed in U.S. Patent No. 4,874,829, U.S. Patent No. 4,795,780, U.S. Patent No. 4,071,661, U.S. Patent No. 6,593,424, Korean Patent No. 0417066, Korean Patent Publication No. 2006-0097999, and the like, the polyfunctional initiator capable of improving the reactivity may be used for the continuous mass polymerization. However, in the continuous mass polymerization method as described above, there is a problem that the investment cost of the continuous polymerization equipment is very high and the process is difficult.

Further, in the method using the copolymer containing? -Methylstyrene, when the content of? -Methylstyrene is reduced to 65% by weight or less in order to reduce the content of the unreacted monomer, the heat resistance is lowered , Acrylonitrile having a relatively increased content constitutes a continuous chain, causing coloring and generating heat discoloration at a high temperature.

Accordingly, in order to solve the above problems, the present inventors have found that by introducing a styrene monomer at the time of polymerization of a heat-resistant copolymer containing? -Methylstyrene to minimize the residual monomer content, And an ABS resin composition excellent in discoloration resistance.

An object of the present invention is to provide a heat-resistant ABS resin composition excellent in workability and discoloration resistance at high temperatures.

Another object of the present invention is to provide a heat-resistant ABS resin composition excellent in workability and discoloration resistance at high temperatures while maintaining excellent impact resistance, flowability and heat resistance.

It is still another object of the present invention to provide a molded article produced from the heat resistant ABS resin composition.

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

The heat-resistant ABS resin composition according to the present invention comprises (A) 15 to 40% by weight of a rubber-modified graft copolymer obtained by graft-polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer onto a rubbery polymer; (B) 5 to 60% by weight of a vinyl copolymer obtained by polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer; And (C) from 15 to 65% by weight of a terpolymer obtained by polymerizing 40 to 70% by weight of an alpha alkyl styrene, 20 to 40% by weight of a vinyl cyanide monomer and 10 to 30% by weight of styrene.

In one embodiment of the present invention, the heat-resistant ABS resin composition is prepared by mixing an inorganic filler, an imide copolymer or all of them in an amount of more than 0 to 0.0001 parts by weight per 100 parts by weight of a base resin composed of (A) + (B) By weight or less.

In one embodiment of the present invention, the rubber-modified graft copolymer (A) comprises 40 to 80% by weight of the rubbery polymer, 15 to 45% by weight of an aromatic vinyl monomer, 5 to 20% by weight of a vinyl cyanide monomer, And 0 to 40% by weight of a monomer giving heat resistance are graft-polymerized.

In one embodiment of the present invention, the vinyl copolymer (B) comprises 5 to 95% by weight of a low molecular weight vinyl copolymer having a weight average molecular weight of 50,000 g / mol to less than 120,000 g / mol, and a weight average molecular weight of 120,000 g / mol to 200,000 g / mol or less.

In one embodiment of the present invention, the heat-resistant ABS resin composition is one or more additives selected from the group consisting of a flame retardant, a flame retardant auxiliary, a lubricant, a plasticizer, a heat stabilizer, an antistatic agent, an antioxidant, a compatibilizer, .

In one embodiment of the present invention, a pellet-shaped heat-resistant ABS resin composition prepared by extruding the heat-resistant ABS resin composition is introduced into an injection machine having a mold clamping force of 100 tons and a cylinder temperature of 250 DEG C and molded according to ASTM D1925 The yellow index and the difference in yellow index of the pellet-shaped heat-resistant ABS resin composition measured according to ASTM D1925 of the molded article after staying in the extruder for 10 minutes are 3 to 9.

The molded article according to the present invention is produced from the heat-resistant ABS resin composition.

In one embodiment of the present invention, the molded article has a notched Izod impact strength of 11 to 17 kgf · cm / cm measured in accordance with ASTM D256, a temperature of 230 ° C according to ASTM D1238 and a load of 3.8 kg , A melt index of 3 to 18 g / 10 min, and a softening temperature of beetlet measured according to ISO 306 of 103 to 113 ° C.

Hereinafter, the present invention will be described in detail.

The heat-resistant ABS resin composition according to the present invention is excellent in workability and discoloration resistance at high temperatures while maintaining excellent impact resistance, fluidity and heat resistance.

The heat-resistant ABS resin composition according to the present invention comprises (A) 15 to 40% by weight of a rubber-modified graft copolymer obtained by graft-polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer onto a rubbery polymer; (B) 5 to 60% by weight of a vinyl copolymer obtained by polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer; And (C) from 15 to 65% by weight of a terpolymer obtained by polymerizing 40 to 70% by weight of an alpha alkyl styrene, 20 to 40% by weight of a vinyl cyanide monomer and 10 to 30% by weight of styrene.

In one embodiment of the present invention, the heat-resistant ABS resin composition is prepared by mixing an inorganic filler, an imide copolymer or all of them in an amount of more than 0 to 0.0001 parts by weight per 100 parts by weight of a base resin composed of (A) + (B) By weight, preferably not less than 0 and not more than 0.0000001 parts by weight, more preferably not less than 0 and not more than 0.0000000001 parts by weight. This means that the heat-resistant ABS resin composition substantially does not contain the inorganic filler, the imide-based copolymer, or both. As described above, when the inorganic filler is included, miscibility and dispersibility with the polymer resin are deteriorated, and mechanical properties such as impact strength, flexural strength and tensile strength of the ABS resin may be lowered, The compatibility with the SAN constituting the matrix of the ABS resin may be deteriorated and the mechanical properties may be deteriorated and the color characteristics such as the yellowness, whiteness and thermal discoloration of the ABS resin may be significantly deteriorated.

(A) a rubber-modified graft copolymer

The rubber-modified graft copolymer is obtained by graft-polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer onto a rubbery polymer.

Examples of the rubbery polymer include diene rubbers such as polybutadiene, poly (styrene-butadiene) and poly (acrylonitrile-butadiene), saturated diene rubbers obtained by adding hydrogen to the diene rubbers, isoprene rubber, polybutyl acrylate Acrylate, ethylene-propylene-diene monomer rubber (EPDM), and the like, but are not limited thereto. These may be used alone or in combination. Of these, diene rubber is preferably used, and polybutadiene is more preferably used.

In one embodiment of the present invention, the average particle diameter of the rubbery polymer may be 0.10 to 0.40 m, preferably 0.20 to 0.30 m. When the average particle diameter of the rubbery polymer is within the above range, the impact resistance of the heat resistant ABS resin composition can be kept excellent.

In one embodiment of the present invention, the gel content of the rubbery polymer may be 70-90%, preferably 75-85%. When the gel content is within the above range, the appearance, impact resistance and fluidity of the heat-resistant ABS resin composition can be kept excellent.

Examples of the aromatic vinyl-based monomer include styrene,? -Methylstyrene,? -Methylstyrene,? -Methylstyrene, para-t-butylstyrene, ethylstyrene, vinylxylene, monochlorostyrene, dichlorostyrene, dibromostyrene, vinyl Naphthalene, and the like, but the present invention is not limited thereto. These may be used alone or in combination. Of these, styrene is preferably used.

Examples of the vinyl cyanide-based monomer include acrylonitrile, methacrylonitrile, ethacrylonitrile, and the like, but are not limited thereto. These may be used alone or in combination. Of these, acrylonitrile is preferably used.

In one embodiment of the present invention, the monomer that imparts processability and heat resistance to the rubbery polymer may be further graft-polymerized. Examples of the monomer that imparts the processability and heat resistance include acrylic acid, methacrylic acid, maleic anhydride, N- Substituted maleimide, and the like, but the present invention is not limited thereto. These may be used alone or in combination.

In one embodiment of the present invention, the rubber-modified graft copolymer (A) comprises 40 to 80% by weight of the rubbery polymer, 15 to 45% by weight of an aromatic vinyl monomer, 5 to 20% by weight of a vinyl cyanide monomer, And 0 to 40% by weight of a monomer giving heat resistance are graft-polymerized.

The rubbery polymer may preferably be used in an amount of 50 to 70% by weight, more preferably 55 to 65% by weight, and the aromatic vinyl-based monomer may preferably be used in an amount of 20 to 40% by weight, more preferably 25 to 35% , And the vinyl cyanide monomer is preferably used in an amount of 5 to 15% by weight, more preferably 8 to 13% by weight, and the monomer giving the processability and heat resistance is preferably 0 to 30% by weight, more preferably 0 To 20% by weight.

The rubber-modified graft copolymer may be used in an amount of 15 to 40% by weight, preferably 24 to 36% by weight, based on 100% by weight of the base resin composed of (A) + (B) + (C).

In one embodiment of the present invention, the rubber-modified graft copolymer comprises (1) from 40 to 80% by weight of a rubbery polymer, a mixture of an aromatic vinyl monomer, a vinyl cyanide monomer, and a monomer for imparting processability and heat resistance, 10 to 40% by weight of the polymerization initiator is added to the reactor, the molecular weight regulator, the reducing agent, the emulsifier, the polymerization initiator and the ion exchanged water are added thereto, the temperature of the reactor is raised while stirring, (2) mixing the remaining amount of the monomer mixture and the molecular weight regulator with the first graft copolymer, and continuously feeding the polymerization initiator over a period of 2 to 5 hours to obtain a first graft copolymer The second graft copolymer can be produced by a method of producing a second graft copolymer. Specific details of this manufacturing method are described in detail in Korean Patent Laid-Open Publication No. 2003-0056087, which is incorporated by reference herein.

(B) a vinyl-based copolymer

The vinyl-based copolymer is obtained by polymerizing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer.

Examples of the aromatic vinyl-based monomer include styrene,? -Methylstyrene,? -Methylstyrene,? -Methylstyrene, para-t-butylstyrene, ethylstyrene, vinylxylene, monochlorostyrene, dichlorostyrene, dibromostyrene, vinyl Naphthalene, and the like, but the present invention is not limited thereto. These may be used alone or in combination. Of these, styrene is preferably used.

Examples of the vinyl cyanide-based monomer include acrylonitrile, methacrylonitrile, ethacrylonitrile, and the like, but are not limited thereto. These may be used alone or in combination. Of these, acrylonitrile is preferably used.

In one embodiment of the present invention, the vinyl copolymer is obtained by polymerizing 60 to 90% by weight of an aromatic vinyl monomer and 10 to 40% by weight of a vinyl cyan monomer. The aromatic vinyl monomer may preferably be used in an amount of 70 to 80% by weight, more preferably 72 to 76% by weight, and the vinyl cyanide monomer is preferably 20 to 30% by weight, more preferably 24 to 28% Can be used.

In one embodiment of the present invention, the vinyl copolymer (B) comprises 5 to 95% by weight of a low molecular weight vinyl copolymer having a weight average molecular weight of 50,000 g / mol to less than 120,000 g / mol, and a weight average molecular weight of 120,000 g / mol to 200,000 g / mol or less. In this case, the heat-resistant ABS resin composition can have better impact resistance and fluidity.

The low molecular weight vinyl copolymer may have a weight average molecular weight of preferably 60,000 g / mol to 110,000 g / mol, more preferably 80,000 g / mol to 100,000 g / mol, and the weight average of the high molecular weight vinyl copolymer The molecular weight may preferably be 130,000 g / mol to 190,000 g / mol, more preferably 130,000 g / mol to 150,000 g / mol.

The low molecular weight vinyl copolymer may preferably be used in an amount of 20 to 80% by weight, more preferably 30 to 75% by weight, and the high molecular weight vinyl copolymer preferably has 20 to 80% by weight, 70% by weight.

The vinyl copolymer may be used in an amount of 5 to 60% by weight, preferably 10 to 50% by weight, based on 100% by weight of the base resin composed of (A) + (B) + (C).

In one embodiment of the present invention, the vinyl copolymer may be prepared by mixing and reacting an aromatic vinyl monomer, a vinyl cyanide monomer, a molecular weight modifier and a polymerization initiator. The details of this manufacturing method are described in detail in Korean Patent Laid-Open Publication No. 1999-0018855, which is incorporated herein by reference.

(C) a terpolymer

The terpolymer is obtained by polymerizing 40 to 70% by weight of alpha alkyl styrene, 20 to 40% by weight of vinyl cyanide monomer and 10 to 30% by weight of styrene.

Examples of the alpha alkyl styrene include alpha methyl styrene, alpha ethyl styrene, and the like, but are not limited thereto. These may be used alone or in combination. Of these, alpha methyl styrene is preferably used.

Examples of the vinyl cyanide-based monomer include acrylonitrile, methacrylonitrile, ethacrylonitrile, and the like, but are not limited thereto. These may be used alone or in combination. Of these, acrylonitrile is preferably used.

In one embodiment of the present invention, the styrene may be selected from the group consisting of 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 2-ethylstyrene, Styrene, 4-n-propylstyrene, 4-t-butylstyrene, 1-vinylnaphthalene, 2-vinylnaphthalene and the like.

The alpha-alkylstyrene may be used in an amount of 40 to 70 wt%, preferably 45 to 65 wt%, more preferably 50 to 60 wt%, and the vinyl cyanide monomer may be used in an amount of 20 to 40 wt%, preferably 22 to 35 wt% %, More preferably 24 to 30 wt%, and the styrene may be used in an amount of 10 to 30 wt%, preferably 13 to 27 wt%, and more preferably 16 to 23 wt%.

The terpolymer may be used in an amount of 15 to 65% by weight, preferably 25 to 55% by weight, based on 100% by weight of the base resin comprising (A) + (B) + (C).

In one embodiment of the present invention, the weight average molecular weight of the terpolymer is 100,000 g / mol to 200,000 g / mol, preferably 120,000 g / mol to 160,000 g / mol.

In one embodiment of the present invention, the above-mentioned terpolymer can be produced by a production method such as emulsion polymerization, suspension polymerization, bulk polymerization, solution polymerization, etc. As described above, the above- , The content of the unreacted monomer is minimized, thereby minimizing the problem of deterioration in heat resistance, physical properties, moldability and discoloration resistance at high temperatures of the heat resistant ABS resin composition.

In one embodiment of the present invention, the heat-resistant ABS resin composition is one or more additives selected from the group consisting of a flame retardant, a flame retardant auxiliary, a lubricant, a plasticizer, a heat stabilizer, an antistatic agent, an antioxidant, a compatibilizer, . The additive may be used in an amount of 1 to 50 parts by weight, preferably 1 to 30 parts by weight, based on 100 parts by weight of the base resin composed of (A) + (B) + (C).

In one embodiment of the present invention, the heat-resistant ABS resin composition can be produced in the form of pellets or chips by mixing components and additives, followed by melt extrusion in an extruder. The molded article according to the present invention is produced from the heat-resistant ABS resin composition, and there is no particular limitation on the method for producing the molded plastic article using the heat-resistant ABS resin composition. For example, plastic molded articles of the heat-resistant ABS resin composition can be produced by extrusion, injection molding, or cast molding.

In one embodiment of the present invention, a pellet-shaped heat-resistant ABS resin composition prepared by extruding the heat-resistant ABS resin composition is introduced into an injection machine having a mold clamping force of 100 tons and a cylinder temperature of 250 DEG C and molded according to ASTM D1925 The yellow index and the difference in yellow index of the pellet-shaped heat-resistant ABS resin composition measured according to ASTM D1925 of the molded article after staying in the extruder for 10 minutes are 3 to 9.

In one embodiment of the present invention, the molded article produced from the heat-resistant ABS resin composition according to the present invention has a notched Izod impact strength of 11 to 17 kgf · cm / cm measured in accordance with ASTM D256, A melt index of 3 to 18 g / 10 min measured under the conditions of a temperature of 230 캜 and a load of 3.8 kg in accordance with D1238, and a softening temperature of beetlet measured in accordance with ISO 306 of 103 to 113 캜.

The heat-resistant ABS resin composition according to the present invention is excellent in impact resistance, fluidity and heat resistance, as well as in processability at high temperatures and discoloration resistance, and therefore can be suitably applied to various products. For example, the heat-resistant ABS resin composition may be used as a housing for electrical and electronic products such as a TV, an audio device, a mobile phone, a digital camera, a navigation device, a washing machine, a computer, a monitor, an MP3 player, a video player, a CD player, Or a housing of an office automation machine such as a copier, a facsimile machine, a printer, or the like.

The present invention will be further illustrated by the following examples, but the following examples are used for the purpose of illustrating the present invention and are not intended to limit the scope of protection of the present invention.

Example

The components used in the following examples and comparative examples are as follows.

(A) a rubber-modified graft copolymer

G-ABS obtained by graft-polymerizing 31 wt% of styrene and 11 wt% of acrylonitrile was used as 58 wt% of polybutadiene. The average particle diameter of g-ABS is 0.245 μm and the gel content is 80%.

(B) a vinyl-based copolymer

(B1) Low molecular weight vinyl copolymer

A low molecular weight SAN obtained by polymerizing 74 wt% of styrene and 26 wt% of acrylonitrile was used. The weight average molecular weight of the low molecular weight SAN is 90,000 g / mol.

(B2) High molecular weight vinyl copolymer

A high molecular weight SAN obtained by polymerizing 74 wt% of styrene and 26 wt% of acrylonitrile was used. The weight average molecular weight of the high molecular weight SAN is 140,000 g / mol.

(C) a terpolymer

AMS-SAN obtained by polymerizing 54 wt% of alpha methyl styrene, 27 wt% of acrylonitrile, and 19 wt% of styrene was used. The weight average molecular weight of AMS-SAN is 140,000 g / mol.

(D) Heat-resistant vinyl-based copolymer

AMS-AN obtained by polymerizing 70 wt% of alpha methyl styrene and 30 wt% of acrylonitrile was used. The weight average molecular weight of AMS-AN is 133,000 g / mol.

Etc

0.1 parts by weight of Irganox 1076 manufactured by Ciba Corp. as antioxidant, 0.3 parts by weight of magnesium stearate as a lubricant and 0.2 parts by weight of carbon black as a pigment were used.

Example  1-6 and Comparative Example  1-4

The above components and other additives were mixed in the amounts shown in the following Table 1 (the content of each component was in terms of wt%), the mixture was fed at a rate of 60 kg / hr, the rpm of the screw was 250 Extruded at a temperature of 250 DEG C using a twin-screw extruder having a diameter of 45 mm and L / D = 32, and the extrudate was prepared in the form of pellets. The prepared pellets were dried at 100 ° C. for 4 hours or more and then injected at a temperature of 250 ° C. to prepare specimens having a size of 2.2 mm × 10 mm × 6 mm. The properties of the prepared specimens were measured by the following methods.

(1) Impact resistance: The notched Izod impact strength of a 1/4 inch thick specimen was measured in accordance with ASTM D256 (unit: kgf · cm / cm).

(2) Fluidity: Melt index was measured according to ASTM D1238 at a temperature of 230 캜 and a load of 3.8 kg (unit: g / 10 min).

(3) Heat resistance: Vicat softening temperature was measured according to ISO 306 under a load of 5 kg and a heating rate of 50 ° C / hr (unit: ° C).

(4) Workability at high temperature: The pellets were injected into a helical flow mold having a mold clamping force of 110 tons, a thickness of 2 mm and a width of 15 mm, and then injection temperature of 60 DEG C and injection pressure of 750 Kg / The length of the injection material filled in the spiral flow mold was visually judged (⊚: very fine, ◯: Kim, △: short, ×: very short).

(5) Color discoloration resistance at high temperature: A heat resistant ABS resin composition in the form of a pellet produced by extruding a heat resistant ABS resin composition was placed in an injection machine having a mold clamping force of 100 tons and a cylinder temperature of 250 DEG C, YI) was measured according to ASTM D1925 (measured by a color computer measuring instrument manufactured by Suga Instrument, Japan), and the yellow index and the pellet-shaped heat-resistant ABS resin composition were allowed to stand in the extruder for 10 minutes, The difference (? YI) of the yellow index measured according to D1925 was measured. The small difference means that the discoloration resistance at high temperature is excellent.

From Table 1, it can be seen that Example 1-6 has excellent impact resistance, fluidity and heat resistance, but also excellent workability at high temperature and discoloration resistance. In particular, comparing Examples 3 and 1 with Comparative Examples 3 and 4, Examples 3 and 1 used a lower content of a-methylstyrene than Comparative Examples 3 and 4, but compared to Comparative Examples 3 and 4 It is found that the heat resistance is equal to or higher than that of the comparative example.

In addition, in Comparative Example 1-2, since the SAN was not used, the impact resistance and the fluidity were somewhat lowered, and the workability and discoloration resistance at a high temperature were remarkably lowered. Further, in Comparative Example 3-4, the impact resistance, flowability and workability at high temperature were somewhat lowered by using AMS-AN instead of AMS-SAN, and the discoloration resistance at high temperature was remarkably decreased.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

(A) 15 to 40% by weight of a rubber-modified graft copolymer obtained by graft-polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer onto a rubbery polymer;
(B) 5 to 60% by weight of a vinyl copolymer obtained by polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer; And
(C) 15 to 65% by weight of a terpolymer obtained by polymerizing 50 to 60% by weight of an alpha alkyl styrene, 22 to 35% by weight of a vinyl cyanide monomer and 13 to 27% by weight of styrene;
Resistant ABS resin composition.
The positive resist composition according to claim 1, wherein the inorganic filler, the imide copolymer or all of the inorganic filler, the imide copolymer or both of the inorganic filler and the imide copolymer is contained in an amount of more than 0 to 0.0001 part by weight based on 100 parts by weight of the base resin composed of (A) + (B) Resistant ABS resin composition.
The thermoplastic resin composition according to claim 1, wherein the rubber-modified graft copolymer (A) comprises 40 to 80% by weight of a rubbery polymer, 15 to 45% by weight of an aromatic vinyl monomer, 5 to 20% by weight of a vinyl cyanide monomer, Is graft-polymerized with 0 to 40 wt%
The heat-resistant ABS resin composition according to claim 1, wherein the monomer giving the processability and heat resistance is acrylic acid, methacrylic acid, maleic anhydride, N-substituted maleic acid, or a mixture thereof.
The vinyl-based copolymer according to claim 1, wherein the vinyl-based copolymer (B) comprises 5 to 95% by weight of a low molecular weight vinyl copolymer having a weight average molecular weight of 50,000 g / mol or more and less than 120,000 g / mol, And 5 to 95% by weight of a high molecular weight vinyl copolymer having an ethylene content of at least 200,000 g / mol.
The ink composition according to claim 1, further comprising at least one additive selected from the group consisting of a flame retardant, a flame retardant, a lubricant, a plasticizer, a heat stabilizer, an anti-dropping agent, an antioxidant, a compatibilizer, a light stabilizer, Heat resistant ABS resin composition.
The ABS resin composition according to any one of claims 1 to 5, wherein the pellet-shaped heat-resistant ABS resin composition prepared by extruding the heat-resistant ABS resin composition is injected into an injection machine having a mold clamping force of 100 tons and a cylinder temperature of 250 DEG C The yellow index measured in accordance with ASTM D1925 of the molded article and the heat resistant ABS resin composition in the pellet form are retained in the extruder for 10 minutes, and the difference in yellow index of the molded article measured according to ASTM D1925 is 3 to 9 Resistant ABS resin composition.
A molded article produced from the heat-resistant ABS resin composition according to any one of claims 1 to 5.
The molded article according to claim 7, wherein the 1/4 inch thick specimen measured according to ASTM D256 has a notched Izod impact strength of 11 to 17 kgf · cm / cm, a temperature of 230 ° C according to ASTM D1238 and a load of 3.8 kg And a softening point of the beeskelt measured according to ISO 306 is 103 to 113 ° C.