KR102160470B1 - Thermoplastic resin composition, method for preparing the resin composition and molding product comprising the resin composition - Google Patents

Abstract

The present invention relates to a thermoplastic resin composition, a method for producing the same, and a molded article including the same, and more particularly, an aromatic vinyl compound and a vinyl cyan compound are grafted onto a styrene resin, a silicone-polycarbonate, an ultrahigh molecular weight siloxane compound, and a polyolefin. It relates to a thermoplastic resin composition comprising a graft resin, a method for producing the same, and a molded article including the same.
According to the present invention, a thermoplastic resin that generates less friction noise by maintaining a low coefficient of dynamic friction while maintaining a low coefficient of mechanical properties such as impact strength and thermal deformation temperature of the resin against time lapse or external environmental changes, excellent workability There is an effect of providing a composition.

Description

Thermoplastic resin composition, manufacturing method thereof, and molded article containing the same {THERMOPLASTIC RESIN COMPOSITION, METHOD FOR PREPARING THE RESIN COMPOSITION AND MOLDING PRODUCT COMPRISING THE RESIN COMPOSITION}

The present invention relates to a thermoplastic resin composition, a method of manufacturing the same, and a molded article including the same, and more particularly, excellent mechanical properties such as impact strength, heat resistance such as heat deflection temperature, and processability while maintaining a low dynamic coefficient of friction. Thus, there is an effect of providing an excellent quality thermoplastic resin composition that generates less fricative noise.

ABS (acrylonitrile-butadiene-styrene) resins are used in various fields such as electricity, electronics, and automobiles because of their excellent mechanical properties and balance of properties. ABS resins are often used by assembling after molding each part, and when each part is assembled and vibrated or contracted while contracting or expanding, an unpleasant friction sound occurs. With the recent advancement of products, there is an increasing demand for products with excellent emotional quality with less unpleasant odor or noise.

In particular, as the demand for materials that generate less noise during friction in terms of materials is increasing, especially for automobile companies, material manufacturers are also attempting to develop materials that generate less friction noise.

For example, in the case of Japanese TPC, a resin with reduced friction noise is produced by grafting a SAN resin to EPDM resin and then hydrogenating a polymer to remove the double bond of diene with ABS resin to produce a resin with reduced frictional noise, but the thermal deformation characteristics of the EPDM resin This is low and there is a disadvantage in that the thermal deformation properties of the final ABS resin composition are deteriorated.

As another example, a method of compounding with ABS resin by reacting maleic acid-modified SAN resin of Japan UMG and perfluorodecanethiol is known, but perfluorodecanethiol is expensive, and the impact strength of the final resin composition There was a low drawback.

Japanese Patent Application Publication No. 2012-046669

In order to solve the problems of the prior art as described above, the present invention is to provide a thermoplastic resin composition having excellent processability while maintaining the inherent mechanical properties of an ABS-based resin, and continuously maintaining a low dynamic coefficient of friction to generate less frictional noise. The purpose.

Another object of the present invention is to provide a method for producing a thermoplastic resin composition having the above properties and a molded thermoplastic resin article prepared from the resin composition.

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

In order to achieve the above object, the present invention is a styrene-based resin 50 to 98.5% by weight; 1 to 49.5% by weight of silicone-polycarbonate; 0 to 10% by weight of an ultra-high molecular weight siloxane compound; And 0.5 to 5% by weight of a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted on a polyolefin.

In addition, the present invention is a styrenic resin 50 to 98.5% by weight; 1 to 49.5% by weight of silicone-polycarbonate; 0 to 10% by weight of an ultra-high molecular weight siloxane compound; And 0.5 to 5% by weight of a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted on a polyolefin.

In addition, the present invention provides a thermoplastic resin molded article, characterized in that produced by injecting the thermoplastic resin composition.

According to the present invention, while having excellent mechanical properties such as excellent impact strength and heat resistance properties such as thermal deformation temperature inherent in ABS-based resin, mechanical properties and heat resistance are less deteriorated against time lapse or external environmental changes, and excellent processability and continuous By maintaining a low coefficient of friction, there is an effect of providing a thermoplastic resin composition that generates less frictional noise.

Specifically, the thermoplastic resin molded article manufactured by injecting the thermoplastic resin composition of the present invention has excellent surface impact strength of 16.5J or higher and a heat deflection temperature of 106°C or higher, and has excellent processability with a flow index of 10 to 20g/10min. Low friction coefficient has the effect of generating less frictional noise.

Hereinafter, the thermoplastic resin composition of the present disclosure and a method of manufacturing the same will be described in detail.

The thermoplastic resin composition of the present invention comprises 50 to 98.5% by weight of a styrenic resin; 1 to 49.5% by weight of silicone-polycarbonate; 0 to 10% by weight of an ultra-high molecular weight siloxane compound; And 0.5 to 5% by weight of a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted on a polyolefin.

In another example, the thermoplastic resin composition of the present invention comprises 65 to 95% by weight of a styrene resin, 1 to 30% by weight of a silicone-polycarbonate, 1 to 8% by weight of an ultrahigh molecular weight siloxane compound, and an aromatic vinyl compound and a vinyl cyanide compound in the polyolefin. It may contain 0.5 to 3% by weight of the grafted graft resin, and within this range, mechanical strength such as impact resistance and heat resistance are excellent, but workability is excellent, and friction noise is generated less.

In another example, the thermoplastic resin composition of the present invention comprises 80 to 90% by weight of a styrene-based resin, 2.5 to 10% by weight of a silicone-polycarbonate, 3 to 7.5% by weight of an ultra-high molecular weight siloxane compound, and an aromatic vinyl compound and a vinyl cyan compound in a polyolefin. It may contain 1 to 2.5% by weight of the grafted graft resin, and has excellent mechanical strength and heat resistance such as impact resistance within the above range, but has excellent physical property balance and workability, and produces less frictional noise during processing and use. It works.

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

Styrenic resin

In the present invention, the styrenic resin is not particularly limited if it is a styrenic resin which is usually meant in this field, and preferably a) a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer, b) an aromatic vinyl compound-maleimide It is specified that it may be one or more selected from the group consisting of a copolymer and c) an aromatic vinyl compound-vinyl cyan compound copolymer, and a polymer derived from the copolymer may also be possible.

The term "polymer derived" in the present description means that other monomers or polymers not originally included in the copolymer are copolymerized together, or copolymerized as a derivative of the monomer.

In the present description, a derivative is a compound in which a hydrogen atom or an atomic group of the original compound is substituted with another atom or an atomic group, and, for example, refers to a compound substituted with a halogen or alkyl group.

When the styrene-based resin includes a) a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer, there is an effect of excellent impact resistance and heat resistance of the final resin composition.

In the present invention, unless otherwise specified, the vinyl cyan compound may be one or more selected from the group consisting of acrylonitrile, methacrylonitrile, ethacrylonitrile, and derivatives thereof, but is not limited thereto.

In the present invention, the rubber polymer may be at least one of a butadiene polymer, a butadiene-styrene copolymer, a butadiene-acrylonitrile copolymer, an ethylene-propylene copolymer, or a polymer derived therefrom, but is not limited thereto unless otherwise specified. Is specified.

In the present invention, unless otherwise specified, the aromatic vinyl compound copolymer may be at least one selected from the group consisting of styrene, α-methylstyrene, p-methylstyrene, vinyltoluene, and derivatives thereof. It should be noted that it is not necessarily limited thereto.

In a preferred example, a) a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer may include an acrylonitrile-butadiene-styrene resin, an acrylonitrile-butadiene-alphamethylstyrene resin, or both, and in this case, mechanical It has an excellent balance of physical properties and properties and has excellent processability.

The styrenic resin of the present invention may include b) an aromatic vinyl compound-maleimide copolymer, and in this case, the heat resistance of the resin composition is further improved.

In the present invention, unless otherwise specified, the maleimide is at least one selected from the group consisting of N-phenylmaleimide, N-methyl maleimide, N-ethyl maleimide, N-butyl maleimide and N-cyclohexyl maleimide. I can.

In addition, the b) aromatic vinyl compound-maleimide copolymer may be an aromatic vinyl compound-maleimide-maleic anhydride terpolymer further comprising maleic anhydride.

As a preferred example, b) the aromatic vinyl compound-maleimide copolymer may be a styrene-phenylmaleimide resin, and in this case, there is an advantage of excellent mechanical properties such as heat resistance of the resin composition.

The styrenic resin of the present invention may include c) an aromatic vinyl compound-vinyl cyan compound copolymer, and in this case, there is an advantage of excellent processability of the final resin composition, excellent mechanical properties such as heat resistance, and excellent physical property balance. .

In a preferred example, c) the aromatic vinyl compound-vinyl cyan compound copolymer may be one selected from a styrene-vinyl cyan compound copolymer or an alphamethylstyrene-aromatic compound copolymer, and more preferably a mixture thereof.

As described above, when c) an aromatic vinyl compound-vinyl cyan compound copolymer is used by mixing a styrene-vinyl cyan compound copolymer and an alpha methyl styrene-vinyl cyan compound copolymer, the final resin composition has excellent heat resistance and impact resistance. There is an advantage of excellent physical property balance.

In addition, when a styrene-vinyl cyan compound copolymer and an alpha methyl styrene-vinyl cyan compound copolymer are mixed and used, the weight ratio is 1:0.5 to 1:3, 1:0.5 to 1:2, 1:1 to 1:2 Alternatively, it may be preferably 1:1 to 1:1.5, but is not limited thereto. However, within the above range, the resin composition has excellent mechanical properties such as impact resistance, as well as excellent heat resistance, and has an excellent balance of properties.

As a specific example, the styrenic resin of the present invention is a) a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer 10 to 50% by weight, b) an aromatic vinyl compound-maleimide copolymer 10 to 50% by weight and c) aromatic vinyl It contains 20 to 60% by weight of the compound-vinyl cyan compound copolymer, and in this case, there is an advantage of excellent mechanical properties such as heat resistance and impact resistance, and excellent balance of physical properties.

In another specific example, the styrene resin is a) a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer 20 to 40% by weight, b) an aromatic vinyl compound-maleimide copolymer 15 to 35% by weight and c) aromatic vinyl It contains 20 to 50% by weight of the compound-vinyl cyan compound copolymer, and in this case, there is an effect of having excellent physical properties such as heat resistance and impact resistance while having excellent physical property balance.

In another example, the styrenic resin is a) a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer 23 to 35% by weight, b) an aromatic vinyl compound-maleimide copolymer 23 to 30% by weight and c) aromatic vinyl Comprising 25 to 50% by weight of the compound-vinyl cyan compound copolymer, in this case, there is an advantage of excellent physical properties such as heat resistance and impact resistance.

Silicone-polycarbonate ( Si -PC)

The silicone-polycarbonate may be used as an example containing a silicone compound in the polycarbonate structure, 1 to 50% by weight, 1 to 30% by weight, 1 to 20% by weight, or 5 to 15% by weight, within this range While maintaining the inherent mechanical properties of polycarbonate, it has excellent low-temperature impact strength and surface impact strength, and has excellent chemical resistance by lowering the stress of the resin.

In the present invention, the silicone-polycarbonate is not particularly limited, and a silicone compound and a polycarbonate are kneaded and used through a method known in the art, or a commercially available material may be used.

For example, silicone-polycarbonate is prepared by kneading and extruding a silicone polymer prepared by polymerizing a polycarbonate prepared by reacting a diphenol compound with a phosgene compound, a halogen acid ester compound, a carbonate ester compound, or a combination thereof. It may have been.

The diphenol compounds are, for example, 4,4'-dihydroxydifetyl, 2,2-bis-(4-hydroxyphenyl)-propane, 2,4-bis-(4-hydroxyphenyl)-2 -Methylbutane, 1,1-bis-(4-hydroxyphenyl)-cyclohexane, 2,2-bis-(3-chloro-4-hydroxyphenyl)-propane, 2,2-bis-(3, 5-dichloro-4-hydroxyphenyl)-propane, and the like, preferably bisphenol-A, 2,2-bis-(4-hydroxyphenyl)-propane may be one or more selected from the group consisting of, but limited thereto. It is not possible.

The silicone monomer is, for example, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcycloheptasiloxane, dodecamethylcyclohexasiloxane, trimethyltriphenylcycloxtrisiloxane, tetramethyltetraphenylcyclotetrasiloxane and octaphenyl It may be one or more selected from the group consisting of cyclotetrasiloxane, but is not limited thereto.

In addition, commercially available silicon-polycarbonate, for example, SABIC's EXL 1414T (5% Si), Idemitsu's RC1760 (7% Si), Samyang's SYC ST6-3022PJ (9% Si), and LG Chem's Lupoy 8000-05 ( 7% Si) or the like can be used.

The weight average molecular weight of the silicone-polycarbonate may be preferably 20,000 to 40,000 g/mol or 25,000 to 35,000 g/mol, as measured by gel permeation chromatography using polycarbonate as a standard sample, Within this range, there is an advantage of excellent processability and moldability of the thermoplastic resin composition and excellent mechanical properties.

In the present description, the weight average molecular weight can be measured by gel permeation chromatography.

Ultra high molecular weight Siloxane compound

In the present invention, the ultra-high molecular weight siloxane compound may be a siloxane compound containing 40 to 60% by weight or 45 to 55% by weight of siloxane, and within this range, the final thermoplastic resin composition has excellent mechanical properties and chemical resistance. It has an excellent advantage.

The siloxane compound may be one or more selected from the group consisting of polydimethylsiloxane, polydiphenylsiloxane, polymethylphenylsiloxane, polymethylhydrogensiloxane, methacrylic-modified polysiloxane, phenol-modified polysiloxane, but is not limited thereto. do.

The ultra-high molecular weight siloxane compound may have a weight average molecular weight, for example, 1 million to 5 million g/mol or 1.5 million to 3 million g/mol, and is excellent in processability and moldability of the resin composition within this range. There is an effect of excellent physical property balance.

In addition, the ultra-high molecular weight siloxane compound may be used that contains 40 to 60% by weight of siloxane and 40 to 60% by weight of a carrier resin, and in this case, the compatibility of the resin composition is improved, so that it has excellent processability and excellent mechanical properties. have.

In another example, the ultra-high molecular weight siloxane compound may be used that contains 45 to 55% by weight of siloxane and 45 to 55% by weight of a carrier resin, and in this case, the compatibility and processability of the resin composition are excellent, thereby improving productivity. have.

The carrier resin may be, for example, one or more selected from a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer or an aromatic vinyl compound-vinyl cyan compound copolymer, and in this case, there is an advantage of excellent compatibility and processability of the resin composition. . In a more specific example, the carrier resin may be at least one selected from acrylonitrile-butadiene rubber-styrene copolymer or styrene-acrylonitrile copolymer, and in this case, there is an advantage of more excellent processability and moldability.

In the present invention, the ultra-high molecular weight siloxane compound is 0 to 10% by weight, more than 0 to 10% by weight, 1 to 8% by weight or 3 to the total weight of the styrene-based resin, silicone-polycarbonate, ultra-high molecular weight siloxane compound, and graft resin. It may be desirable to be included in 7.5% by weight, and within this range, there is an advantage of excellent compatibility and processability while having high mechanical properties of the final resin composition.

Polyolefin-aromatic vinyl compound-vinyl cyan compound Graft Suzy

The thermoplastic resin composition of the present invention includes a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted onto a polyolefin, which has an effect of reducing frictional noise by continuously maintaining a low coefficient of dynamic friction.

The graft resin may include, for example, 40 to 60% by weight of a polyolefin, 20 to 50% by weight of an aromatic vinyl compound, and 5 to 30% by weight of a vinyl cyanide compound, and in this case, the coefficient of dynamic friction is low and the friction sound is reduced. There is.

As another example, the graft resin may contain 43 to 57% by weight of a polyolefin, 25 to 45% by weight of an aromatic vinyl compound, and 5 to 25% by weight of a vinyl cyanide compound, and there is an advantage in that frictional noise is reduced within this range. .

In another example, the graft resin may contain 45 to 55% by weight of a polyolefin, 30 to 40% by weight of an aromatic vinyl compound, and 8 to 20% by weight of a vinyl cyanide compound, and within this range, the coefficient of dynamic friction is low. And there is an effect of reducing the fricative sound when used.

The polyolefin may be at least one selected from polyethylene and polypropylene, and preferably includes polyethylene.

As a specific example, the graft resin may be a resin in which styrene and acrylonitrile are grafted onto polyethylene.

In addition, the graft resin is preferably included in 0.5 to 5% by weight, 0.5 to 3% by weight, or 1 to 2.5% by weight based on the total weight of the styrene-based resin, silicone-polycarbonate, ultra-high molecular weight siloxane compound, and graft resin. In this range, the mechanical properties of the final resin composition are not deteriorated, and frictional noise is reduced.

The thermoplastic resin composition of the present invention may optionally contain one or more additives such as a lubricant, an antioxidant, and a heat stabilizer, if necessary.

As an example, the thermoplastic resin composition of the present invention is a styrene-based resin; Silicone polycarbonate; Ultra high molecular weight siloxane compounds; And a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted onto a polyolefin. It may contain 0.01 to 1 part by weight of a lubricant and 0.01 to 1 part by weight of an antioxidant based on a total of 100 parts by weight, and in this case, the processability and moldability of the resin composition are excellent, and the mechanical properties of the resin composition against changes in time or external environment There is little deterioration of the effect.

The thermoplastic resin composition of the present invention comprises 50 to 98.5% by weight of a styrenic resin; 1 to 49.5% by weight of silicone polycarbonate; 0 to 10% by weight of an ultra-high molecular weight siloxane compound; And 0.5 to 5% by weight of a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted onto a polyolefin, and then extruding the mixture.

As described above, the thermoplastic resin composition may further include one or more additives such as a lubricant, an antioxidant, and a heat stabilizer during kneading.

The kneading and extrusion may be performed under conditions of 150 to 250 rpm and 230 to 270° C., for example, and there is an advantage of excellent processability and moldability within a range.

In addition, it may be preferable that the ultra-high molecular weight siloxane compound introduced in the manufacture of the thermoplastic resin composition is a siloxane compound master batch comprising 40 to 60% by weight of siloxane and 40 to 60% by weight of a carrier resin. There is an advantage of easy kneading due to improved compatibility, and ultimately, there is an effect of improving productivity.

The carrier resin may be, for example, at least one selected from a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer or an aromatic vinyl compound-vinyl cyan compound copolymer, and by using this, compatibility between the compositions may be further improved.

Furthermore, a thermoplastic resin molded article may be manufactured by injecting the thermoplastic resin composition of the present invention, and the injection may be performed under conditions of 240 to 260°C and 60 to 80 bar, for example.

The molded article has a surface impact strength of 16.5J or more, 18J or more, or 18 to 19.5J, for example, and a heat deformation temperature of 106°C or more or 160 to 111°C, which has excellent impact resistance and heat resistance.

In addition, the molded product has a flow index of 10 to 20 g/10min or 10 to 15g/10min, which has excellent processability and moldability, excellent chemical resistance, and low friction noise during processing and use. have.

Hereinafter, a preferred embodiment is presented to aid the understanding of the present invention, but the following examples are only illustrative of the present invention, and it is obvious to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention, It is natural that such modifications and modifications fall within the appended claims.

[Example]

Example 1 to Example 5

Using the components and contents in Table 1 below, kneading and extruding in a twin-screw extruder (250°C, 200rpm) to prepare a thermoplastic resin composition in the form of a pellet, and then injection (250°C, 70bar) to prepare a specimen for measuring physical properties I did.

Comparative example 1 to Comparative example 3

It was carried out in the same manner as in Example 1, except that the components and contents of Table 1 were used.

Materials used in the above Examples and Comparative Examples are as follows.

1) Styrene resin

-ABS resin with a rubber content of 60% by weight (DP270, manufactured by LG Chem)

-ST-PMI-MAH resin containing styrene (ST), N-phenylmaleimide (PMI) and maleic anhydride (MAH) (MSNB, manufactured by Denka, Japan, Tg: 202°C)

-AMS-AN resin containing 75% by weight of alpha methyl styrene (AMS) and 25% by weight of acrylonitrile (AN) (98UHM, manufactured by LG Chem, Tg: 122°C)

-SAN resin containing 69% by weight of styrene (ST) and 31% by weight of acrylonitrile (AN) (97HC, manufactured by LG Chem)

2) Silicon-polycarbonate (Si-PC)

-Si-PC resin with 7% by weight of silicon (Lupoy 8000-05, manufactured by LG Chem)

-Si-PC resin with 9% by weight of silicon content (SYC ST6-022PJ, manufactured by Samyang)

3) Ultra high molecular weight siloxane masterbatch (Si M/B)

-Siloxane masterbatch in which 50% by weight of siloxane compound is dispersed in ABS resin (MB50-007, manufactured by Dow Corning)

-A siloxane masterbatch in which 50% by weight of a siloxane compound is dispersed in a SAN resin (MB50-008, manufactured by Dow Corning)

4) Polyethylene graft resin (PE-g-SAN)

A resin in which 50% by weight of a SAN resin (70% by weight of ST, 30% by weight of AN) is grafted to 50% by weight of LDPE (low density polyethylene) (A1401, manufactured by NOF, Japan)

5) additive

-Use EBA (N'N-ethylene bis-stearamide) or polydimethylsiloxane (PDMA, kinematic viscosity 10,000 cSt, manufactured by Dow Corning) as a lubricant

-Use Songnox1076 (manufactured by Songwon Industries) or PEP-24 (manufactured by ADEKA) as an antioxidant

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Styrenic
Suzy ABS resin 23 23 23 21 21 24 23 21 AMS-AN resin 25 25 25 22 22 30 25 25 ST-PMI-MAH resin 22 22 22 22 22 22 22 22 SAN resin 18 18 20 18 18 20 20 16 Si-PC Si 7wt% 5 - - - 10 - 5 5 Si 9wt% 5 5 10 - - - - Ultra high molecular weight Si-M/B MB50-007 5 5 3 5 - 6 5 5 MB50-008 - - - - 5 - - - PE-g-SAN 2 2 2 2 2 - - 6 slush EBA 0.5 0.5 0.5 0.5 0.5 0.5 0.5 - PDMS - - - - - - - 0.5 Antioxidant Songnox1076 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 PEP-24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2

[Test Example]

The properties of the specimens prepared in the Examples and Comparative Examples were measured by the following method, and the results are shown in Table 2 below.

Izod Impact strength (1/8", kgfcm /cm)

According to ASTM D256, a notch was made in a specimen having a thickness of 3.2 mm and measured.

Surface impact strength (J)

According to ASTM D5628, a specimen having a diameter of 100 mm and a thickness of 3 mm was used to measure the total breakdown energy.

Flow index (g/ 10min )

According to ASTM D1238, it was measured under conditions of 240°C and a load of 10 kg.

Heat deflection temperature (℃)

It was measured using a specimen having a thickness of 6.4 mm according to ASTN D648.

Dynamic coefficient of friction

According to ASTM D1984, the average dynamic coefficient of friction was measured by pulling a specimen having a width of 63.5 mm × 63.5 mm at a speed of 150 mm/min.

Fricative grade

Ziegler instrument's stick-slip tester SSP-04 was used to measure the PRN (risk priority number) grade, and the PRN grade was evaluated based on the following criteria.

PRN: 1~3 (no friction sound), 4~5 (friction sound occurs intermittently), 6~10 (friction sound occurs)

Surface contamination evaluation (flow mark)

Whether or not black flow marks were generated on the surface of the prepared specimen was visually judged. If no flow trace occurred, it was marked as good, and if it occurred, it was marked as bad.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Izod impact strength 14.9 15.3 16.1 18.5 14.5 16.8 15.7 12.5 Surface impact strength 18.2 18.5 19.3 17.4 16.7 7.9 16.4 17.3 Flow index 13.1 12.8 11.2 11.0 11.5 14.4 9.5 16.8 Heat deflection temperature 106.9 107.3 108.9 110.4 110.6 106.0 111.3 104.3 Dynamic coefficient of friction 0.0765 0.0762 0.1022 0.0674 0.0685 0.0790 0.0935 0.0645 Fricative grade 40N, 1mm/sec One 2 2 3 2 5 8 One 40N, 4mm/sec One One One One One 2 3 One Surface contamination
(flow mark) Good Good Good Good Good Good Good Poor

As shown in Table 2, the thermoplastic resin compositions of Examples 1 to 5 according to the present invention have surface impact while maintaining the same level of physical properties as Comparative Examples 1 to 3 not according to the present invention in Izod impact strength and heat deflection temperature. It was confirmed that the strength was improved.

In addition, it was confirmed that Examples 1 to 5 and Comparative Example 3 of the present invention including a graft resin (PE-g-SAN) in which a SAN resin was grafted on polyethylene was low in the fricative grade and the coefficient of dynamic friction.

However, in the case of Comparative Example 3 in which an excessive amount of PE-g-SAN graft resin was used, the impact strength was lower than that of Examples 1 to 5 according to the present invention, the thermal deformation temperature was lower, and black streaks occurred on the surface of the molded article. Through this, it was confirmed that the moldability of the thermoplastic resin composition was deteriorated when an excessive amount of the PE-g-SAN graft resin was used.

Claims (19)

80 to 90% by weight of a styrene resin; 2.5 to 10% by weight of silicone-polycarbonate; 5 to 7.5% by weight of an ultra-high molecular weight siloxane compound; And 0.5 to 5% by weight of a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted to a polyolefin;
The styrenic resin is a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer 20 to 40% by weight, an aromatic vinyl compound-maleimide copolymer 15 to 35% by weight, and an aromatic vinyl compound-vinyl cyan compound copolymer 20 to 50% by weight Contains %,
The aromatic vinyl compound-vinyl cyan compound copolymer comprises a styrene-vinyl cyan compound copolymer and an alphamethylstyrene-vinyl cyan compound copolymer in a weight ratio of 1:1.2 to 1:1.4,
The ultra-high molecular weight siloxane compound is characterized in that the weight average molecular weight is 1.5 million to 3 million g/mol
Thermoplastic resin composition. delete delete delete delete The method of claim 1,
The silicone-polycarbonate is characterized in that it contains 1 to 50% by weight of a silicone compound
Thermoplastic resin composition. delete The method of claim 1,
The ultra-high molecular weight siloxane compound is a siloxane compound containing 40 to 60% by weight of siloxane.
Thermoplastic resin composition. The method of claim 8,
The ultra-high molecular weight siloxane compound is characterized in that it comprises 40 to 60% by weight of the siloxane and 40 to 60% by weight of the carrier resin.
Thermoplastic resin composition. The method of claim 9,
The carrier resin is characterized in that at least one selected from a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer or an aromatic vinyl compound-vinyl cyan compound copolymer
Thermoplastic resin composition. The method of claim 1,
The graft resin comprises 40 to 60% by weight of a polyolefin, 20 to 50% by weight of an aromatic vinyl compound, and 5 to 30% by weight of a vinyl cyan compound.
Thermoplastic resin composition. The method of claim 11,
The polyolefin is characterized in that at least one selected from polyethylene and polypropylene
Thermoplastic resin composition. The method of claim 1,
The thermoplastic resin composition is a styrenic resin; Silicone-polycarbonate; Ultra high molecular weight siloxane compounds; And a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted onto a polyolefin. Characterized in that it comprises 100 parts by weight, 0.01 to 1 part by weight of a lubricant and 0.01 to 1 part by weight of an antioxidant
Thermoplastic resin composition. 80 to 90% by weight of a styrene resin; 2.5 to 10% by weight of silicone-polycarbonate; 5 to 7.5% by weight of an ultra-high molecular weight siloxane compound; And 0.5 to 5% by weight of a graft resin in which an aromatic vinyl compound and a vinyl cyan compound are grafted on a polyolefin; and kneading and extruding,
The styrene-based resin is a vinyl cyan compound-rubber polymer-aromatic vinyl compound copolymer 20 to 40% by weight, an aromatic vinyl compound-maleimide copolymer 15 to 35% by weight, and an aromatic vinyl compound-vinyl cyan compound copolymer 20 to 50% by weight Contains %,
The aromatic vinyl compound-vinyl cyan compound copolymer comprises a styrene-vinyl cyan compound copolymer and an alphamethylstyrene-vinyl cyan compound copolymer in a weight ratio of 1:1.2 to 1:1.4,
The ultra-high molecular weight siloxane compound is characterized in that the weight average molecular weight is 1.5 million to 3 million g/mol
Method for producing a thermoplastic resin composition. The method of claim 14,
The ultra-high molecular weight siloxane compound is characterized in that it is a siloxane compound master batch comprising 40 to 60% by weight of siloxane and 40 to 60% by weight of a carrier resin.
Method for producing a thermoplastic resin composition. It characterized in that it is produced by injection of the thermoplastic resin composition according to any one of claims 1, 6 and 8 to 13
Thermoplastic molded products. The method of claim 16,
The molded article is characterized in that the surface impact strength is 16.5J or more
Thermoplastic molded products. The method of claim 16,
The molded article is characterized in that the heat deformation temperature is 106 ℃ or more
Thermoplastic molded products. The method of claim 16,
The molded article is characterized in that the flow index is 10 to 20/10min.
Thermoplastic molded products.