KR20150076607A - Polyphenylenesulfide Resins Composition - Google Patents

Polyphenylenesulfide Resins Composition Download PDF

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Publication number
KR20150076607A
KR20150076607A KR1020130165013A KR20130165013A KR20150076607A KR 20150076607 A KR20150076607 A KR 20150076607A KR 1020130165013 A KR1020130165013 A KR 1020130165013A KR 20130165013 A KR20130165013 A KR 20130165013A KR 20150076607 A KR20150076607 A KR 20150076607A
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South Korea
Prior art keywords
weight
polyphenylene sulfide
parts
glycidyl methacrylate
strength
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KR1020130165013A
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Korean (ko)
Inventor
이건준
박은하
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코오롱플라스틱 주식회사
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Priority to KR1020130165013A priority Critical patent/KR20150076607A/en
Publication of KR20150076607A publication Critical patent/KR20150076607A/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
    • C08G75/02—Polythioethers
    • C08G75/0204—Polyarylenethioethers
    • C08G75/0209—Polyarylenethioethers derived from monomers containing one aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0869—Acids or derivatives thereof
    • C08L23/0884—Epoxide containing esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
    • C08L81/02—Polythioethers; Polythioether-ethers

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention relates to a polyphenylenesulfide resin composition, comprising: polyphenylenesulfide resin; 40-60 parts by weight of glass fiber; and 8-16 parts by weight of glycidyl methacrylate ethylene copolymer resin grafted with polymethyl methacrylate, with respect to 100 parts by weight of the polyphenylenesulfide resin. Accordingly, the composition exhibits superior impact resistance and thermal resistance.

Description

TECHNICAL FIELD The present invention relates to a polyphenylene sulfide resin composition,

TECHNICAL FIELD [0001] The present invention relates to a polyphenylene sulfide resin composition used as a component material for electric, electronic, automobile and industrial materials.

BACKGROUND ART As materials used in various industrial parts such as electrical parts, electric parts, automobile parts, electric parts, connectors, fittings, bobbins, optical pick-up parts and gears that require precision injection, However, in order to lighten the product and improve the moldability, the conversion to plastic is increasing.

Accordingly, polyphenylene sulfide resin (PPS resin) is used so as to satisfy the heat resistance and dimensional stability required for the materials used in various industrial parts as described above. PPS resins are excellent in heat resistance, excellent in dimensional stability as compared with other thermoplastic resins, exhibit chemical and flame retardant properties, and thus can be used as materials used in various industrial fields as described above.

Because of the characteristics of components in various industrial fields as described above, it is necessary to maintain the physical property retention in an environment of high temperature and pressure conditions, and therefore, initial impact resistance, rigidity and impact characteristics are required as the materials of such components.

However, when a polyphenylene sulfide resin is used alone as a material for a component, inherent heat resistance, chemical resistance, and flame retardancy are maintained, but the physical properties can not be satisfied

Accordingly, attempts have been made to improve the physical properties of polyphenylene sulfide resin by adding various additives such as an impact reinforcing agent to the polyphenylene sulfide resin.

Korean Unexamined Patent Publication No. 10-2005-0102228 has attempted to improve the impact and heat resistance of polyphenylene sulfide through a polyether sulfone resin and an organosilane system. However, in the present invention, the impact strength and the tensile strength are not simultaneously improved Respectively.

According to Japanese Patent No. 3473186, glycidyl ester of? -Olefin and?,? - unsaturated acid was added to polyphenylene sulfide to impart the characteristics of the thin film and increase toughness, but the stiffness could not be maintained.

According to Japanese Patent No. 3239491, an attempt has been made to react an olefin-based copolymer containing a carboxyl group or a carboxylic acid derivative group with polyphenylene sulfide and an epoxy compound in advance to increase the impact resistance and toughness through a modified elastomer. It is difficult to reproduce the physical property retention rate according to the heat resistance water evaluation in the invention.

According to Japanese Patent Laid-Open No. 59-164360, attempts have been made to develop a resin composition having improved compatibility and impact resistance by adding a novolac type epoxy resin, but it is difficult to reproduce the heat resistance characteristics.

An object of the present invention is to provide a polyphenylene sulfide resin composition having excellent adhesive strength while maintaining heat resistance, dimensional stability, electrical properties, and chemical resistance, which are inherent properties of polyphenylene sulfide resin.

Accordingly, the present invention provides, as a first preferred embodiment, a polyphenylene sulfide resin; Based on 100 parts by weight of the polyphenylene sulfide resin, 40 to 60 parts by weight of glass fiber; And 8 to 16 parts by weight of a glycidyl methacrylate ethylene copolymer resin having polymethyl methacrylate grafted thereon.

The polyphenylene sulfide resin according to the embodiment may be a linear type and have a flow index of 300 to 500 g / min.

The glycidyl methacrylate ethylene copolymer resin according to the embodiment may contain 10-20 wt% of glycidyl methacrylate and 80-90 wt% of ethylene.

The glycidyl methacrylate ethylene copolymer resin in which the polymethylmethacrylate grafted according to the above embodiment is grafted with 5 to 15% by weight of polymethylmethacrylate.

The polyphenylene sulfide resin composition according to this embodiment has an impact strength of 12.0 to 16.0 kgfcm / cm measured according to ASTM D256, a tensile strength of 1250 to 1,350 kgf / cm 2 measured according to ASTM D638, The weld strength measured according to D638 may be 600 to 700 kgf / cm 2 .

The polyphenylene sulfide resin composition according to this embodiment may have a percentage change in impact strength, a rate of change in tensile strength, and a rate of change in weld strength, which are respectively 10% or less, as measured by the following hot water evaluation.

Evaluation of Heat Water: Impact strength, tensile strength and weld strength were measured after 2,000 hours at 80 ° C and 100% humidity in a thermo-hygrostat.

The polyphenylene sulfide resin composition according to the present invention can exhibit impact resistance and high heat resistance at the same time. Accordingly, the polyphenylene sulfide resin composition exhibits properties applicable to a molded article through which hot water or high-pressure water passes.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a polyphenylene sulfide resin; Based on 100 parts by weight of the polyphenylene sulfide resin, 40 to 60 parts by weight of glass fiber; And 8 to 16 parts by weight of a glycidyl methacrylate ethylene copolymer resin having polymethyl methacrylate grafted thereon.

[Polyphenylene sulfide resin (PPS resin)]

In the present invention, it can be produced by polycondensation using 1.4-dichlorobenzene and sodium sulfide as monomers. The polyphenylene sulfide resin has high heat resistance, low moisture absorption rate, and can exhibit flame retardancy.

The polyphenylene sulfide resin may be a linear type. When the polyphenylene sulfide resin is linear, the filler, that is, the glycidyl methacrylate ethylene copolymer resin in which glass fibers and polymethylmethacrylate are grafted, and the polyphenylene sulfide resin in the cross- And excellent extrudability can be expected.

In addition, the polyphenylene sulfide resin may have a flow index of 300 to 500 g / min, wherein the flow index may be measured according to ASTM D-1238.

If the flow index is less than 300 g / 10 min, the viscosity may be too high to form, and if the flow index is more than 500 g / 10 min, flowability may be high. Here, "burr" refers to a phenomenon in which the resin is injected into the outside of the molded product during injection molding.

[Fiberglass]

The glass fiber according to the present invention may be included as a fiber-based filler in order to allow the polyphenylene sulfide resin composition to simultaneously exhibit impact resistance and rigidity.

When the content of the glass fiber is less than 40 parts by weight, the tensile strength of the glass fiber is lowered. When the glass fiber content is more than 60 parts by weight, the strength of the glass fiber is lowered . Preferably, the content of the glass fiber may be 45 to 55 parts by weight based on 100 parts by weight of the polyphenylene sulfide resin,

The glass fiber may have a chop shape having a length of 3 to 6 mm and a cross-sectional diameter of 10 to 13 탆.

The glass fiber may have its surface treated with a silane coupling agent. The silane coupling agent is a γ-glycidoxy alkyl silane represented by the following formula (1): A γ-methacryloxy alkyl silane represented by the following formula (2); And γ-amino alkyl silanes represented by the following general formula (3). The glass fibers may be surface-treated with the above-mentioned silane coupling agent, The polar element due to hydrogen bonding can expand the interface of the glass fiber.

Formula 1

Figure pat00001

Here, R is an alkyl group, and n is 0 or a natural number of 2 to 3.

(2)

Figure pat00002

Here, R 1 is an alkyl group, and n is 0 or a natural number of 2 to 3.

(3)

Figure pat00003

Here, R 1 is an alkyl group, and n is 0 or a natural number of 2 to 3.

[Glycidyl methacrylate ethylene copolymer resin having polymethyl methacrylate grafted]

In the present invention, the glycidyl methacrylate ethylene copolymer resin in which polymethyl methacrylate is grafted may be used as a shock resistance strengthening agent.

The content of the glycidyl methacrylate ethylene copolymer resin in which polymethylmethacrylate is grafted may be 8 to 16 parts by weight based on 100 parts by weight of the polyphenylene sulfide resin. The polymethylmethacrylate- If the content of the glycidyl methacrylate ethylene copolymer resin is less than 8 parts by weight, the impact resistance may be deteriorated. If the amount is more than 16 parts by weight, surface defects may occur during the evaluation of the heat resistance water, and the physical property retention rate may be lowered.

On the other hand, the glycidyl methacrylate ethylene copolymer resin may contain 80 to 90 wt% of ethylene and 10 to 20 wt% of glycidyl methacrylate. If the content of ethylene is less than 80 wt% or the content of glycidyl methacrylate is more than 20 wt%, the impact strength required in the present invention may be deteriorated. If the ethylene content is more than 90 wt% or glycidyl methacrylate If the content of acrylate is less than 10 wt%, compatibility with the polyphenylene resin may not be good when extruded.

In addition, since the polymethyl methacrylate is grafted to the glycidyl methacrylate ethylene copolymer resin, it is possible to impart impact resistance and heat resistance at the same time, thereby preventing occurrence of pyrolysis, gas problem, mechanical property deterioration, and the like .

At this time, the content of grafted polymethylmethacrylate relative to the total content of the polymethylmethacrylate-grafted glycidyl methacrylate ethylene copolymer resin may be 5 to 15% by weight, and the grafted poly If the content of methyl methacrylate is less than 5% by weight, physical properties may be deteriorated by thermal decomposition upon impact, and when it exceeds 15% by weight, impact resistance may be deteriorated.

On the other hand, the glycidyl methacrylate ethylene copolymer resin in which polymethylmethacrylate is grafted may be represented by the following formula (4).

Formula 4

Figure pat00004

Here, X is an integer of 10 to 30, Y is an integer of 30 to 60, and Z is an integer of 30 to 50.

The polyphenylene sulfide resin composition according to the present invention can be prepared by melt-kneading polyphenylene sulfide resin, glass fiber and glycidyl methacrylate ethylene copolymer resin using the above-described twin-screw extruder.

In addition, the polyphenylene sulfide resin composition according to the present invention can be produced by using glass fiber, which is a fiber-based filler optimized in surface characteristics and shape, and glycidyl methacrylate ethylene copolymer resin, which is used as an impact- It is possible to exhibit high heat resistance and high impact properties capable of improving the resistance value of the hot water resistance.

Such a polyphenylene sulfide resin composition can be applied to a molded product through which hot water or high-pressure water passes. More specifically, the polyphenylene sulfide resin composition includes not only automobile parts, electric and electronic parts but also electric parts, connectors, , Optical pickup parts gears, water outlets, valve parts, and the like.

The polyphenylene sulfide resin composition according to the present invention has an impact strength of 12.0 to 16.0 kgfcm / cm measured according to ASTM D256, a tensile strength measured according to ASTM D638 of 1,250 to 1,350 kgf / cm 2 , ASTM D638 May have a weld strength of 600 to 700 kgf / cm < 2 >

The polyphenylene sulfide resin composition may have an impact strength change rate, a change rate of tensile strength, and a change rate of the weld strength, which are respectively 10% or less as measured by the following hot water evaluation.

Evaluation of Heat Water: Impact strength, tensile strength and weld strength were measured after 2,000 hours at 80 ° C and 100% humidity in a thermo-hygrostat.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments.

Examples 1 to 4 5

A PPS resin was charged into a primary raw material inlet using a twin-screw extruder heated to 280 DEG C, glycidyl methacrylate ethylene copolymer resin in which polymethylmethacrylate was grafted as a secondary raw material inlet was charged, And 50 parts by weight of glass fiber was injected into the side inlet to prepare a PPS resin composition through a heat melting kneading step. At this time, the content of each component is as shown in Table 1.

The PPS resin composition was dried at 120 ° C. for 5 hours by using a dehumidifying dryer, and a test specimen for ASTM standard evaluation was prepared using a screw extruder heated to 270 ° C. to 300 ° C.

Comparative Example  1 and Comparative Example 2

A PPS resin composition was prepared in the same manner as in Example 1, except that the glass fiber content was changed as shown in Table 1.

Comparative Example  3 and Comparative Example 4

A specimen of the PPS resin composition was prepared in the same manner as in Example 1, except that the content of the glycidyl methacrylate ethylene copolymer resin in which polymethylmethacrylate was grafted was changed as shown in Table 1.

Comparative Example  5 and Comparative Example 6

A specimen of a PPS resin composition was prepared in the same manner as in Example 1, except that glycidyl methacrylate ethylene copolymer resin was used instead of glycidyl methacrylate ethylene copolymer resin in which polymethylmethacrylate was grafted .

The impact strength, tensile strength and weld strength of the test pieces of the PPS resin composition prepared in Examples and Comparative Examples were measured in the following manner. Further, the rate of decrease of the physical properties of impact strength, tensile strength and weld strength after the evaluation of the heat resistance water was measured, and the results are shown in Table 2.

(1) Impact Strength (Notched Izod Impact Strength)

The impact strength was measured according to ASTM-D-256.

(2) Tensile Strength

Tensile strength was measured according to ASTM-D-638.

(3) Weld Strength

The weld strength was measured according to ASTM-D-638.

(4) Hot-water test

The impact strength, tensile strength and weld strength were measured after 2,000 hours at 80 ° C and 100% humidity in a thermo-hygrostat.

content
(Unit: parts by weight) PPS resin Glass fiber Polymethyl methacrylate grafted glycidyl methacrylate ethylene copolymer resin Glycidyl methacrylate ethylene copolymer resin Example 1 100 50 11 0 Example 2 100 40 8 0 Example 3 100 60 8 0 Example 4 100 40 16 0 Example 5 100 60 16 0 Comparative Example 1 100 30 11 0 Comparative Example 2 100 70 11 0 Comparative Example 3 100 50 6 0 Comparative Example 4 100 50 18 0 Comparative Example 5 100 50 0 8 Comparative Example 6 100 50 0 16

Impact strength
(kgfcm / cm) The tensile strength
(kgf / cm 2 ) Weld strength
(kgf / cm 2 ) Decrease rate of physical properties after evaluation of heat water (%) Remarks Impact strength The tensile strength Weld strength Example 1 14.0 1,340 680 5.0 5.0 6.0 Example 2 12.0 1,310 630 6.2 6.0 6.2 Example 3 12.5 1,350 660 7.2 7.5 6.8 Example 4 16.0 1,250 600 8.0 7.8 8.5 Example 5 15.5 1,290 625 9.0 8.7 9.5 Comparative Example 1 8.8 1,150 500 6.2 5.5 5.5 Comparative Example 2 11.0 1,310 580 12.0 11.5 13.5 Surface defect Comparative Example 3 8.0 1,420 680 7.0 6.5 7.5 Comparative Example 4 13.0 850 480 14.0 13.5 14.5 Decomposition upon extrusion Comparative Example 5 10.5 1,300 650 6.0 6.0 6.5 Comparative Example 6 14.5 1,180 580 7.2 7.0 7.2

As a result of measurement of physical properties, as shown in Table 2,

When the amount of the glass fiber is less than the proper amount, the impact strength, tensile strength and weld strength are lowered (Comparative Example 1), and when the glass fiber is more than the proper amount, the property lowering rate is higher after the evaluation of the heat resistance water (Comparative Example 2).

In addition, when the amount of the glycidyl methacrylate ethylene copolymer resin in which polymethyl methacrylate was grafted was less than the proper amount, impact strength and tensile strength were lowered (Comparative Example 3), and polymethyl methacrylate grafted When the amount of the glycidyl methacrylate ethylene copolymer resin exceeds the proper amount, the rate of decrease in physical properties after the evaluation of the heat resistant water is large (Comparative Example 4).

When glycidyl methacrylate ethylene copolymer resin is used instead of glycidyl methacrylate ethylene copolymer resin in which polymethylmethacrylate is grafted, at least one physical property such as impact strength, tensile strength and weld strength (Comparative Example 5 and Comparative Example 6)

On the other hand, a polyphenylene sulfide resin composition containing an appropriate amount of glycidyl methacrylate ethylene copolymer resin in which polyphenylene sulfide resin, glass fiber and polymethylmethacrylate are grafted has excellent impact strength, tensile strength, It is expected that not only the strength is excellent but also the property lowering rate after the evaluation of the heat resistant water is small and it is applicable to a molded product through which hot water or high pressure water passes.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, those skilled in the art will appreciate that such specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereto will be. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (6)

Polyphenylene sulfide resin;
With respect to 100 parts by weight of the polyphenylene sulfide resin,
40 to 60 parts by weight of glass fiber; And
And 8 to 16 parts by weight of a glycidyl methacrylate ethylene copolymer resin having polymethyl methacrylate grafted therein. The method according to claim 1,
Wherein the polyphenylene sulfide resin is a linear type and has a flow index of 300 to 500 g / min. The method according to claim 1,
Wherein the glycidyl methacrylate ethylene copolymer resin comprises 10-20% by weight of glycidyl methacrylate and 80-90% by weight of ethylene. The method according to claim 1,
Wherein the polymethyl methacrylate grafted glycidyl methacrylate ethylene copolymer resin has a polymethyl methacrylate grafted in an amount of 5 to 15% by weight. The method according to claim 1,
A tensile strength measured in accordance with ASTM D638 of 12.0 to 16.0 kgfcm / cm, a tensile strength measured in accordance with ASTM D638 of 1,250 to 1,350 kgf / cm 2 , a weld strength measured in accordance with ASTM D638 of 600 to 700 kgf / cm < 2 & gt ;. The method according to claim 1,
, The rate of change in impact strength, the rate of change in tensile strength, and the rate of change in weld strength of the polyphenylene sulfide resin composition measured by the following hot water evaluation are 10% or less, respectively.
Evaluation of Heat Water: Impact strength, tensile strength and weld strength were measured after 2,000 hours at 80 ° C and 100% humidity in a thermo-hygrostat.
KR1020130165013A 2013-12-27 2013-12-27 Polyphenylenesulfide Resins Composition KR20150076607A (en)

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