WO2016085222A1 - 열가소성 수지 조성물 및 이를 적용한 성형품 - Google Patents
열가소성 수지 조성물 및 이를 적용한 성형품 Download PDFInfo
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- WO2016085222A1 WO2016085222A1 PCT/KR2015/012611 KR2015012611W WO2016085222A1 WO 2016085222 A1 WO2016085222 A1 WO 2016085222A1 KR 2015012611 W KR2015012611 W KR 2015012611W WO 2016085222 A1 WO2016085222 A1 WO 2016085222A1
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- XNBZBTZXGQNTNY-UHFFFAOYSA-N CC(C(C)(C)C)C#N Chemical compound CC(C(C)(C)C)C#N XNBZBTZXGQNTNY-UHFFFAOYSA-N 0.000 description 1
- UYOAOYYUSXVILM-UHFFFAOYSA-N CC(C(C)(C)C)c1ccccc1 Chemical compound CC(C(C)(C)C)c1ccccc1 UYOAOYYUSXVILM-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/16—Homopolymers or copolymers of alkyl-substituted styrenes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/18—Homopolymers or copolymers of nitriles
- C08L33/20—Homopolymers or copolymers of acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/08—Copolymers of styrene, e.g. AS or SAN, i.e. acrylonitrile styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/16—Homopolymers or copolymers of alkyl-substituted styrenes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2355/00—Characterised by the use of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08J2323/00 - C08J2353/00
- C08J2355/02—Acrylonitrile-Butadiene-Styrene [ABS] polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/16—Homopolymers or copolymers of alkyl-substituted styrenes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2455/00—Characterised by the use of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08J2423/00 - C08J2453/00
- C08J2455/02—Acrylonitrile-Butadiene-Styrene [ABS] polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S525/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S525/942—Polymer derived from nitrile, conjugated diene and aromatic co-monomers
Definitions
- the present invention relates to a styrene-based thermoplastic resin composition having excellent chemical resistance, and more particularly, to add heat-resistant resin to the graft copolymer resin of vinyl cyanide compound-rubber polymer-aromatic vinyl compound to reinforce heat resistance, (Tg) and the weight average molecular weight (Mw) by adjusting the fluidity and impact resistance balance, and relates to a blow molding resin composition and a molded article molded thereof.
- Styrene-based thermoplastic resin is a resin synthesized to obtain the advantages of the properties of each monomer by styrene as a main raw material or copolymerization with a monomer (monomer).
- styrene resin examples include GPPS (General Purpose Polystyrene) resin which polymerizes styrene alone, EPS (Expendable Polystyrene) resin for foaming, HIPS (High Impact Polystyrene) resin which is a styrene and butadiene rubber copolymer, and SBR (Styrene-Butadiene). Rubber) There is ABS resin in which styrene and acrylonitrile are grafted to butadiene rubber.
- ASA resin polybutadiene
- acrylic impact modifier copolymerized with methyl methacrylate (MMA) and acrylic monomer (Acrylate Monomer) based on the reinforcing agent, transparent ABS resin, acrylic rubber.
- Styrene has advantages in processability, butadiene in impact resistance, and acrylonitrile in rigidity and chemical resistance.
- Styrene-based thermoplastic resin compositions are widely used in various applications, and rubber-reinforced styrene resins, particularly ABS resins, have excellent mechanical properties, molding processability, and are widely used in electrical and electronic parts, office equipment, automobile parts, and the like.
- ABS resins used for injection are ABS copolymers (Acrylonitrile-Butadiene-Styrene, hereinafter referred to as 'emulsion polymerization ABS') polymerized by emulsion polymerization, and styrene-acryl polymerized by bulk polymerization with a weight average molecular weight of 60,000 to 180,000.
- the ronitrile copolymer (Styrene-Acrylonitrile, hereinafter referred to as 'block polymerization SAN') is kneaded, manufactured into pellets by extrusion, and then injected again to be used after processing into a predetermined form.
- the content of the rubbery polymer in the emulsion polymerization ABS is prepared by adjusting in the range of 40 to 60% by weight.
- the emulsion polymerization ABS and the bulk polymerization SAN are appropriately adjusted according to the purpose to manufacture pellets through the extrusion process, and the molten resin is injected into the mold using an injection machine to manufacture the products. It is possible.
- ABS resin used for refrigerator sheet has emulsion polymerization ABS and glass transition temperature in the range of 95 ⁇ 110 °C, weight average molecular weight 80,000 ⁇ 200,000, SAN produced by bulk polymerization, or weight average molecular weight 200,000 ⁇ 2,000,000 as needed
- the SAN produced by the emulsion polymerization is kneaded to produce a pellet through the extrusion process and then molded again by blow molding (Blow Molding) method through the extrusion in the form of a sheet.
- ABS resin for blow molding used to fabricate automotive spoilers requires low melt viscosity and high heat distortion temperature characteristics. Accordingly, in order to use the emulsion polymerization ABS and the alpha methyl styrene-acrylonitrile copolymer ( ⁇ -methylstyrene-Acrylonitrile, AMS heat-resistant SAN) polymerized by emulsion polymerization in the range of 150,000 to 250,000 weight average molecular weight alone or to control melt viscosity. Alpha-methylstyrene-acrylonitrile (AMS heat-resistant SAN) polymerized by mass polymerization in the range of 80,000 to 200,000 by weight average molecular weight may be used in combination.
- AMS heat-resistant SAN alpha methyl styrene-acrylonitrile copolymerized by emulsion polymerization in the range of 150,000 to 250,000 weight average molecular weight alone or to control melt viscosity.
- N-phenylmaleimide N-Phenyl Maleimide (PMI) -based copolymer (PMI heat-resistant SAN) is used in combination to meet the required high heat distortion temperature.
- the alpha-methylstyrene-acrylonitrile copolymer having a weight average molecular weight of 150,000 or more is prepared by emulsion polymerization because it has a high melt viscosity and is very difficult to produce by bulk polymerization.
- the process for producing spoilers for automobiles is made by making a parison through extrusion and then producing molded parts by blow molding method.
- ABS resin for blow molding used to manufacture automobile spoilers it can be manufactured using only the bulk polymerization heat-resistant SAN of 80,000 to 200,000 weight average molecular weight.
- the melt viscosity of the blow molding ABS is low, so that not only the deflection of the parison occurs in the parison production process, but also the thickness unevenness of the molded product is increased when the parison is blown.
- spoiler is mounted on the vehicle due to deterioration of chemical resistance, causing cracking over time in thin areas of the molded product during use, causing spoiler crack defects.
- Blow molding ABS resin for the production of automotive spoiler according to the present invention has an impact strength (1/4 ") 15 kgcm / cm or more, heat deformation temperature (1/4") 100 °C or more, fluidity 0.5 ⁇ 3.0 g / It is to provide a blow molding heat-resistant ABS resin having a elongation retention of 40% or more after 10 min, paint thinner coating.
- the surface is sanded and painted for the purpose of enhancing the beautiful appearance, scratch resistance and weather resistance.
- the surface of ABS resin is eroded by thinner included in the paint during painting, so the physical property is remarkably degraded. It may develop into crazes or cracks and cause defects.
- the initial physical properties of the blow molding ABS resin are designed to be high, the internal residual stress is concentrated in the state of microcrazing during coating if the resin's own chemical resistance (ESCR) decreases. As this progresses, the product develops into cracks, resulting in failure of the product.
- the physical properties that are most sensitive to microcrazing or microcracks at the time of coating are elongations, and as the elongation values after coating decrease more than the initial elongation values, the possibility of cracking due to coating erosion increases.
- the resin for blow molding typically uses a heat-resistant SAN resin raw material having a high molecular weight.
- ESCR environmental stress-cracking resistance
- the use of only heat-resistant SAN resins with a weight average molecular weight of 220,000 or more improves the chemical resistance, while the fluidity decreases excessively, resulting in poor productivity and a slow rate of internal residual stress. Due to the frictional force, the melt resin temperature rises excessively, causing decomposition of the resin. In addition, there is a problem that the impact strength is lowered due to the bondage of the polymer chain.
- the melt viscosity of the blow molding ABS resin is low, so the parison sag occurs in the parison manufacturing process.
- the parison is blown, the thickness non-uniformity of the molded article becomes severe, and when painting the spoiler after molding, the possibility of crack failure increases due to the decrease in chemical resistance.
- the present invention has been made to solve the above problems, in order to improve the heat resistance and chemical resistance of the blow molding thermoplastic resin composition, the emulsion polymerization ABS and the glass transition temperature is 125 °C or more and the weight average molecular weight of 150,000 to 250,000 alpha It provides a resin composition comprising at least 30% by weight or more of the methyl styrene (AMS) -based emulsion polymerization heat-resistant SAN resin.
- AMS methyl styrene
- the glass transition temperature is less than 125 °C, the weight average molecular weight of 80,000 to less than 150,000, including 30% by weight or less alphamethylstyrene-based bulk polymerization heat-resistant SAN resin,
- the N-phenylmaleimide (N-Phenyl Maleimide: PMI) polymer may further include 0 to 10 wt%.
- blow molding thermoplastic resin composition was adjusted in the range of 30 to 75% by weight of the rubbery polymer in order to maintain the impact resistance at an equivalent level or more.
- thermoplastic resin composition for blow molding and a molded article to which the fluidity, impact resistance and heat resistance are balanced at a level equal to or higher but excellent in chemical resistance.
- the present invention relates to a thermoplastic resin composition having excellent chemical resistance, and more particularly, a heat transfer resin is added to a graft copolymer resin of a vinyl cyanide compound-rubber polymer-aromatic vinyl compound to reinforce the heat resistance, but has a glass transition temperature (Tg).
- Tg glass transition temperature
- the present invention relates to a blow molding resin composition and a molded article molded thereof, which maintain balance of fluidity and impact resistance by improving glass transition temperature) and weight-average molecular weight (Mw), and improving chemical resistance.
- thermoplastic resin composition of the present invention will be described in detail.
- the graft copolymer resin of the present invention is a copolymer in which an aromatic vinyl compound and a vinyl cyanide compound are grafted to a rubbery polymer.
- the rubbery polymer is not limited in composition, but hydrogen is added to diene rubbers such as polybutadiene, polystyrene-butadiene, polyacrylonitrile-butadiene, and the diene rubber.
- diene rubbers such as polybutadiene, polystyrene-butadiene, polyacrylonitrile-butadiene, and the diene rubber.
- Saturated rubbers, C1-C8 alkylacrylates, polybutylacrylates, acrylic rubbers such as ethylhexylacrylates, isoprene rubbers, chloroprene rubbers, ethylene-propylene ( Ethylene-Propylene (EPM) rubber and one or more selected from the group consisting of ethylene-propylene-diene monomer (EPDM) rubber may be used, and preferably polybutadiene (polybutadiene) in the diene rubber Apply rubber.
- the content of the rubbery polymer is not limited in the present invention, but is 30 to 75% by weight, preferably 40 to 60% by weight, based on the total weight of the graft copolymer resin. In the case of using such a rubbery polymer, not only the graft ratio is high, but also the impact strength and chemical resistance of the final molded article are excellent.
- the aromatic vinyl compound grafted to the rubbery polymer is not limited in its composition, but styrene, alphamethylstyrene ( ⁇ -methylstyrene), betamethylstyrene ( ⁇ -Methylstyrene), paramethylstyrene (p-Methylstyrene), and ethylstyrene (Ethylstyrene).
- Hydroxy styrene Hydroxystyrene
- vinyl xylene Vinyl xylene
- monochlorostyrene Monochlorostyrene
- dichlorostyrene dichlorostyrene
- dibromostyrene Dibromostyrene
- vinyl naphthalene Vinylnaphthalene
- styrene is applied.
- the content of the aromatic vinyl compound is not limited in the present invention, 30 to 94% by weight based on the total weight of the graft copolymer resin is appropriate, and it is possible to efficiently increase the graft ratio with the rubbery polymer in the above range.
- the vinyl cyanide compound grafted to the rubbery polymer is not limited in composition, but is selected from saturated nitrile series such as acrylonitrile, and unsaturated nitrile series such as methacrylonitrile and ethacrylonitrile. One or more may be used, preferably acrylonitrile is applied.
- the content of the vinyl cyanide compound is not limited in the present invention, 10 to 40% by weight based on the total weight of the graft copolymer resin is appropriate, and it is possible to efficiently increase the graft ratio with the rubbery polymer in the above range.
- acrylonitrile-butadiene-styrene copolymer (acrylonitrile-butadiene-styrene) grafted with acrylonitrile and styrene on butadiene rubbery polymer having excellent physical properties such as impact resistance and heat resistance. Resin) can be used.
- ABS resin used in one embodiment of the present invention is a styrene-acrylonitrile (SAN) is grafted to butadiene rubber as shown in the following formula (1).
- ABS resin is not necessarily limited to acrylonitrile-butadiene-styrene (ABS) resins, and in some cases, vinyl cyanide compound-rubber polymer- It is also possible to extend the analysis to a resin composed of a copolymer of an aromatic vinyl compound.
- the content of the rubbery polymer to satisfy both the fluidity suitable as the blow molding thermoplastic resin, the chemical resistance for the post-molding coating process, and the impact resistance as a finished molded product is 30 to 75% by weight, preferably 40 based on the total weight of the graft copolymer resin. To 60% by weight. In the above range, the fluidity of the resin is not lowered, the impact reinforcing effect is also excellent, and the impact strength and chemical resistance of the finally produced graft copolymer molded article are also excellent.
- thermoplastic resin having excellent impact resistance and processability a rubbery polymer having a large particle size should be used, and a rubbery polymer having a small particle size should be used to obtain a thermoplastic resin having excellent surface gloss.
- the resin used in the present invention is a thermoplastic resin for blow molding, and the average particle diameter of the rubbery polymer may be 0.1 to 1.5 ⁇ m in Z-average for excellent impact resistance, processability and surface gloss.
- the gel content of the rubbery polymer is not particularly limited, but the lower the gel content, the more swelling of the monomers inside the rubbery polymer causes polymerization to increase the apparent particle size, thereby improving the impact strength, while the higher the gel content, the lower the apparent particle size. Excellent surface gloss.
- the gel content is not limited, but when the component is obtained by emulsion polymerization, the gel content is preferably 30 to 98% by weight, and particularly in the above range, a molded article having excellent chemical resistance and impact resistance is provided.
- a thermoplastic resin composition which can be obtained can be obtained.
- a gel content can be calculated
- the graft ratio of ABS used in the present invention is preferably 25 to 55% resin. If the graft rate is less than 25%, there is a lot of rubber latex exposed without grafting, so the rubber particles collide with each other to form cohesive rubber, and the weatherability and transparency are lowered.If the graft rate exceeds 55%, the thermal stability is lowered and the impact efficiency is reduced. There is no more benefit.
- the graft ratio is not limited, but in general, the graft ratio is obtained by applying the values of the weight of the grafted monomer (denoted as W 3 ) and the weight to the core polymer (denoted as W 4 ) to Equation 2 below. Can be derived.
- an emulsion polymerization method As a manufacturing method of the graft ABS resin, an emulsion polymerization method, suspension polymerization method, solution polymerization method, bulk polymerization method, a method using a suspension polymerization and a bulk polymerization together, a method using a emulsion polymerization and a bulk polymerization together, etc. are known. Among these methods, emulsion polymerization and bulk polymerization are common in production.
- ABS resin manufactured by emulsion polymerization has good mechanical properties and gloss, but due to the nature of the emulsion polymerization process, emulsifiers and flocculants, which must be used, are not completely removed in the flocculation and dehydration process and remain in the final product, causing deterioration of physical properties. It is difficult to treat the contaminated water used as the polymerization medium. In addition, since the polymerization and dehydration process must be performed separately after polymerization, it is more economical than the bulk polymerization which is a continuous process.
- ABS resin manufactured by bulk polymerization method has excellent moldability, dimensional stability and impact resistance of moldings, so it is recently applied to various fields such as home appliances, office equipment parts, automobile parts, etc. Therefore, higher impact resistance, gloss and fluidity are required.
- the ABS resin is prepared by the bulk polymerization method, the particle size of the rubbery polymer is larger than that of the ABS resin produced by the emulsion polymerization method. Therefore, the ABS resin produced by the bulk polymerization method may have a high impact resistance, but has a disadvantage of relatively poor gloss.
- the method for preparing the graft ABS resin of the present invention is not particularly limited in emulsion polymerization, bulk polymerization, solution polymerization, and suspension polymerization, but in one embodiment, butadiene-based rubber, acrylonitrile-based monomers, and styrene-based emulsion graft polymerization Then, it may be prepared in a powder form by agglomeration, dehydration and drying, 40 to 60 parts by weight of butadiene-based rubber having an average particle diameter of 0.1 to 1.5 ⁇ m, 0.6 to 2 parts by weight of an emulsifier, 0.2 to 1 parts by weight of a molecular weight regulator, and Emulsion graft polymerization was carried out by continuously or collectively adding a monomer mixture consisting of 10 to 40 parts by weight of acrylonitrile monomers and 30 to 94 parts by weight of styrene monomers to a mixed solution of 0.05 to 0.5 parts by weight of a polymerization initiator. Aggregation
- the copolymer having excellent heat resistance is usually prepared by copolymerizing or terpolymerizing an alphamethylstyrene-based or maleimide-based monomer with a vinylcyan compound such as acrylonitrile and / or an aromatic vinyl compound monomer such as styrene.
- the method of manufacturing the heat resistant ABS resin is a method of manufacturing a heat resistant ABS resin by replacing part or all of the styrene used when preparing the heat resistant copolymer for kneading with alpha methyl styrene having excellent heat resistance (US Patent No. 3,010,936 and No. 3). 4,659,790), a method for producing a heat-resistant ABS resin by containing a maleimide compound (Japanese Patent Laid-Open No. 58-206657, No. 63-162708, No. 63-235350 and US Pat. No. 4,757,109), polycarbonate resin
- Japanese Patent Laid-Open No. 58-206657, No. 63-162708, No. 63-235350 and US Pat. No. 4,757,109 Japanese Patent Laid-Open No. 58-206657, No. 63-162708, No. 63-235350 and US Pat. No. 4,757,109
- the heat resistant copolymer of the present invention is prepared by copolymerizing an aromatic vinyl compound with a polymer monomer having heat resistance in a predetermined temperature range, or is prepared by further copolymerizing a vinyl cyanide compound.
- the heat resistant polymer monomer is selected from the group consisting of alphamethylstyrene, N-phenylmaleimide, N-phenylmaleic acid, and styrene maleic anhydride.
- the heat resistant resin of the present invention is based on a copolymer including alpha methyl styrene ( ⁇ -methylstyrene), and further includes a copolymer including N-phenylmaleimide (N-Phenyl Maleimide).
- the AMS polymer is a copolymer of AMS and acrylonitrile (AN) as shown in Formula 2 below.
- the AMS polymer may be prepared by copolymerizing 50 to 80 parts by weight of AMS monomer and 20 to 50 parts by weight of acrylonitrile (AN) monomer in a predetermined ratio.
- the content of the AMS monomer is less than 50 parts by weight, there may be a problem that the heat resistance is lowered and discolored when heated.
- the amount of the AMS monomer is greater than 80 parts by weight, three or more AMSs are continuously formed in the chain of the heat-resistant resin. There may be a problem that the bonded structure ([AMS]-[AMS]-[AMS]: pyrolysis structure) is rapidly generated and easily decomposed to heat.
- acrylonitrile (AN) when the content of acrylonitrile (AN) is less than 20 parts by weight, there may be a problem that the conversion rate and molecular weight is lowered.
- the solvent When the content of acrylonitrile (AN) exceeds 50 parts by weight, the solvent may contain a large amount of acrylonitrile (AN) in the resin.
- AN acrylonitrile
- the AMS polymer of the present invention may be 30 to 75% by weight, preferably 50 to 75% by weight based on the total resin composition weight.
- the content of the AMS polymer is less than the above range, sufficient heat resistance cannot be obtained.
- the content of the AMS polymer exceeds the above range, not only the fluidity is lowered but also the impact strength and surface gloss decrease due to the relative lack of graft ABS.
- the AMS polymer of the present invention may have a glass transition temperature of 125 ° C. or more, and may be used alone as an AMS polymer having a weight average molecular weight of 150,000 to 250,000 within a range of 30 to 75 wt%, or a glass transition temperature of 125 It is possible to further apply an AMS polymer having a weight average molecular weight of less than 8 ° C and less than 150,000 in the range of 30% by weight or less.
- the PMI polymer may be a copolymer of N- (substituted) maleimide, a vinyl monomer and an unsaturated dicarboxylic acid.
- PMI-based polymers are represented by ternary copolymers of N-phenylmaleimide-styrene-maleic anhydride (PMI-Styrene-Maleic Anhydride) as shown in Chemical Formula 3 below.
- the tertiary copolymer of Chemical Formula 3 is preferably composed of 45 to 55% by weight of phenylmaleimide (PMI), 40 to 50% by weight of styrene and 1 to 10% by weight of maleic hydride, most preferably PMI 50 Wt%, styrene 45 wt% and maleic hydride 5 wt%, but the present invention is not limited thereto.
- PMI phenylmaleimide
- the PMI polymer of the present invention can be selectively applied to the AMS polymer within the range of 0 to 10% by weight, and has a glass transition temperature of 180 to 220 ° C and a weight average molecular weight of 80,000 to 200,000 g / mol. Do. In the above range, there is an advantage of showing excellent heat resistance and impact resistance, and extrusion and flow properties are also good.
- the glass transition temperature is 125 °C, when the glass transition temperature of the heat-resistant resin is more than the reference temperature is excellent in the heat resistance of the resin, but the fluidity is lowered. Therefore, the heat-resisting resin included in the thermoplastic resin for blow molding has an advantage of excellent heat resistance, but there is a disadvantage that the productivity is lowered because the fluidity is reduced.
- the heat resistant resin of the present invention uses a weight average molecular weight of 80,000 or more and 250,000 or less. If it is less than 80,000, there is a problem of lowering chemical resistance and heat resistance, and if it exceeds 250,000, chemical resistance is improved, but fluidity is lowered, so processing is not easy and productivity is lowered.
- the weight average molecular weight of the heat resistant resin When the weight average molecular weight of the heat resistant resin is applied in the range of 150,000 to 250,000, it is possible to produce a relatively high molecular weight resin, thereby improving the chemical resistance and impact resistance of the resin. That is, as a heat resistant resin included in the thermoplastic resin for blow molding, there is an effect that can prevent crazes or cracks due to thinners in a later coating process.
- a relatively low molecular weight resin having a weight average molecular weight of 80,000 or more and less than 150,000 is prepared and mixed in a predetermined content ratio, excellent chemical resistance and impact resistance Maintain levels, but improve fluidity to complement productivity.
- the manufacturing method of the heat-resistant resin is also possible, but among these methods, the emulsion polymerization method (Emulsion Polymerization) and the bulk polymerization method (Bulk Polymerization) are common.
- the emulsion polymerization method Emsion Polymerization
- the bulk polymerization method Bulk Polymerization
- US Patent Nos. 3,010,936, 3,367,995 and 4,774,287 disclose methods for producing copolymers having excellent heat resistance using emulsion polymerization.
- AMS-based resins are widely used by emulsion polymerization and kneading. This method is excellent in economic efficiency and impact resistance, but the reaction temperature is low due to the emulsion polymerization characteristics of AMS, requiring a long reaction time and thermal stability. Due to this lack, there is a problem that a lot of gas is generated during processing and gloss is lowered.
- US Pat. No. 5,414,045 and US Pat. No. 5,569,709 disclose methods for preparing AMS resin by bulk polymerization to improve the problems of emulsion polymerization.
- This method has the advantage of obtaining a high-purity polymer having a high degree of polymerization.
- the viscosity or polymerization rate tends to increase with the progress of the reaction, the molecular weight distribution is wide, and the polymer may be colored by side reactions. .
- thermoplastic resin composition
- ABS As a copolymer in which an aromatic vinyl compound and a vinyl cyanide compound were grafted to a conjugated diene rubber polymer, ABS (SR172, manufacturer: LG Chem) having a content of 60% of the rubber polymer prepared through emulsion polymerization was used.
- AMS heat-resistant resin (PW635, manufacturer: LG Chem) having a glass transition temperature of 130 ° C. prepared by emulsion polymerization and a weight average molecular weight of 170,000 was used.
- AMS heat-resistant resin (98UHM, manufactured by LG Chemical) having a glass transition temperature of 120 ° C. and a weight average molecular weight of 100,000 was used.
- PMI heat resistant resin (MS-NB, manufacturer: Denka) having a glass transition temperature of 201 ° C. and a weight average molecular weight of 150,000 was used.
- the resin (C) was prepared according to the component ratios shown in Table 1 below.
- A, B-1, B-2, and C are the prepared thermoplastic resins.
- Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 A 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 B-1 62 61 40 28 0 B-2 0 10 20 31 62 C 0 One 2 3 0 Total (% by weight) 100 100 100 100 100 100 100 100
- ABS base resin (SR172, manufacturer: LG Chem) was fixed at 38 wt%, except that some of them were (B-1) AMS heat-resistant resin ( PW635, manufacturer: LG Chem) 51% by weight, (B-2) AMS type heat resistant resin (98UHM, manufacturer: LG Chem) 10% by weight, (C) PMI type heat resistant resin (MS-NB, manufacturer: Denka) Was prepared at 1% by weight.
- ABS base resin (SR172, manufacturer: LG Chem) was fixed at 38 wt%, except that some of them were (B-1) AMS heat-resistant resin ( PW635, manufacturer: LG Chem) 40% by weight, (B-2) AMS type heat resistant resin (98UHM, manufacturer: LG Chem) 20% by weight, (C) PMI type heat resistant resin (MS-NB, manufacturer: Denka) Was prepared at 2% by weight.
- ABS base resin (SR172, manufacturer: LG Chem) was fixed at 38 wt%, except that some of them were (B-1) AMS heat-resistant resin ( PW635, manufacturer: LG Chem) 28% by weight, (B-2) AMS type heat resistant resin (98UHM, manufacturer: LG Chem) 31% by weight, (C) PMI type heat resistant resin (MS-NB, manufacturer: Denka) Was prepared at 3% by weight.
- Table 2 below kneads the compositions of Examples 1 to 3 and Comparative Examples 1 and 2 at 240 in a twin-screw extruder at 240, and then produced a test specimen for injection to determine the flow index (g / 10 min).
- the physical properties of the impact strength (kg ⁇ cm / cm), thermal strain temperature (HDT, °C) and elongation retention (%) are shown.
- Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Flow index (g / 10min) 1.3 1.6 1.9 1.9 2.5 Impact strength (kgcm / cm) 23 24 22 16 22 HDT (°C) 106 105 105 103 101 Elongation retention rate (%) 71 87 41 19 30
- the physical property evaluation conditions of this invention are as follows.
- Tables 1 and 2 above show (A) 38% by weight of ABS basic resin, 62% of heat resistant resin (B-1), (B-2) AMS heat resistant resin and / or (C) PMI heat resistant resin It shows the result of having comprised by the predetermined composition ratio.
- An object of the present invention relates to a thermoplastic resin composition and a molded article for blow molding, looking at the conditions to be equipped with a resin composition having suitable properties for this, as follows.
- the flow index should satisfy the range of 0.5 to 3.0 g / 10 min. If the flow index is less than 0.5 g / 10min, the molding process may have difficulty, the physical properties of the resin may be deteriorated due to excessive frictional heat. If the flowability is more than 3.0 g / 10min, the resin tube (Parison) sagging of the blow molding process may occur. The range is most preferred since it occurs.
- the chemical resistance for the painting process should be excellent. If the chemical resistance of the resin is weak, micro crazing occurs due to erosion of the coating during coating, and causes cracks due to residual stress in the resin. Therefore, in the present invention, the elongation retention after 10 minutes after applying thinner to the resin should satisfy 40% or more.
- the heat deflection temperature is preferably in the range of 100 to 120 ° C. and the impact strength of 20 to 35 kg ⁇ cm / cm.
- the present invention is a 25 to 50% by weight ABS resin having a rubber polymer content of 40 to 60% by weight, a glass transition temperature of 125 ° C or more, and a weight average molecular weight of 150,000 or more and 250,000 or less Blow comprising 30 to 75% by weight of AMS-based heat resistant resin, 0 to 30% by weight of AMS-based heat resistant resin having a glass transition temperature of less than 125 ° C, and having a weight average molecular weight of 80,000 to 150,000. It provides a resin composition for molding.
- the AMS heat-resistant resin may be prepared by emulsion polymerization or bulk polymerization.
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Abstract
Description
실시예 1 | 실시예 2 | 실시예 3 | 비교예 1 | 비교예 2 | |
A | 38 | 38 | 38 | 38 | 38 |
B-1 | 62 | 61 | 40 | 28 | 0 |
B-2 | 0 | 10 | 20 | 31 | 62 |
C | 0 | 1 | 2 | 3 | 0 |
합계(중량%) | 100 | 100 | 100 | 100 | 100 |
실시예 1 | 실시예 2 | 실시예 3 | 비교예 1 | 비교예 2 | |
유동지수 (g/10min) | 1.3 | 1.6 | 1.9 | 1.9 | 2.5 |
충격강도(kg·cm/cm) | 23 | 24 | 22 | 16 | 22 |
HDT(℃) | 106 | 105 | 105 | 103 | 101 |
신율 유지율(%) | 71 | 87 | 41 | 19 | 30 |
Claims (12)
- 시안화 비닐화합물-고무질 중합체-방향족 비닐화합물 그라프트 공중합체 수지 25 ∼ 50 중량%; 및유리전이온도(Tg)가 125℃ 이상이며, 중량평균분자량(Mw)이 150,000 내지 250,000인 알파메틸스티렌(AMS: α-methylstyrene)계 내열수지 30 ∼ 75 중량%;를 포함하는 블로우 몰딩을 위한 열가소성 수지 조성물.
- 제1항에 있어서,상기 그라프트 공중합체 수지는 부타디엔 고무질 중합체에 아크릴로니트릴 및 스티렌이 그라프트된 ABS 수지인 것을 특징으로 하는 블로우 몰딩을 위한 열가소성 수지 조성물.
- 제1항에 있어서,상기 그라프트 공중합체 수지는 고무질 중합체의 함량이 40 ∼ 60 중량%인 것을 특징으로 하는 블로우 몰딩을 위한 열가소성 수지 조성물.
- 제1항에 있어서,상기 내열수지는 유화중합으로 제조되는 것을 특징으로 하는 블로우 몰딩을 위한 열가소성 수지 조성물.
- 제1항에 있어서,상기 열가소성 수지 조성물은 유리전이온도가 125℃ 미만이며, 중량평균분자량이 80,000 이상 150,000 미만인 알파메틸스티렌계 내열수지를 0 ∼ 30 중량% 더 포함하는 것을 특징으로 하는 블로우 몰딩을 위한 열가소성 수지 조성물.
- 제5항에 있어서,상기 알파메틸스티렌계 내열수지는 괴상중합으로 제조되는 것을 특징으로 하는 블로우 몰딩을 위한 열가소성 수지 조성물.
- 제1항에 있어서,상기 열가소성 수지 조성물은 N-페닐말레이미드(PMI: Phenyl Maleimide)계 내열수지를 0 ∼ 10 중량%를 더 포함하는 것을 특징으로 하는 블로우 몰딩을 위한 열가소성 수지 조성물.
- 제1항의 열가소성 수지 조성물을 사용하여 블로우 몰딩 공정으로 성형한 성형품.
- 제8항에 있어서,상기 성형품은 ASTM D638-10에 의한 신율 유지율이 40 % 이상인 것을 특징으로 하는 성형품:[단, 상기 신율 유지율(%) = (신너 적용 후 신율/신너 적용 전 신율) X 100]
- 제8항에 있어서,상기 성형품은 ASTM D1238에 의한 유동지수가 0.5 ∼ 3.0 g/10min인 것을 특징으로 하는 성형품:[단, 220℃, 10 kg 하중에서 10분당 압출량(g)을 측정]
- 제8항에 있어서,상기 성형품은 ASTM D256에 의한 충격강도가 20 내지 35 kg·cm/cm인 것을 특징으로 하는 성형품:[단, 노치(notch)가 형성된 1/4"(6.35 mm) 두께의 시편을 적용]
- 제8항에 있어서,상기 성형품은 ASTM D648-07에 의한 열변형 온도가 100 이상 120℃ 이하인 것을 특징으로 하는 성형품:[단, 18.6 kgf/cm2 하중, 120 /hr 조건으로 1/4"(6.35 mm) 두께의 시편을 적용]
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US15/309,719 US10106677B2 (en) | 2014-11-28 | 2015-11-24 | Thermoplastic resin composition and molded product obtained by applying same |
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KR102257967B1 (ko) * | 2017-12-11 | 2021-05-28 | 주식회사 엘지화학 | 내열 수지 조성물 및 이를 이용한 자동차용 스포일러 |
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- 2015-11-24 WO PCT/KR2015/012611 patent/WO2016085222A1/ko active Application Filing
- 2015-11-24 CN CN201580029679.XA patent/CN106459542B/zh active Active
- 2015-11-24 JP JP2016566230A patent/JP6503374B2/ja active Active
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KR20160064864A (ko) | 2016-06-08 |
EP3127962B1 (en) | 2019-07-10 |
US10106677B2 (en) | 2018-10-23 |
CN106459542B (zh) | 2019-02-22 |
WO2016085222A8 (ko) | 2016-09-29 |
EP3127962A1 (en) | 2017-02-08 |
KR101811485B1 (ko) | 2017-12-21 |
US20170260382A1 (en) | 2017-09-14 |
JP2017536423A (ja) | 2017-12-07 |
JP6503374B2 (ja) | 2019-04-17 |
EP3127962A4 (en) | 2017-10-18 |
CN106459542A (zh) | 2017-02-22 |
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