KR20160072716A - Polyester resin composition for laser welding, Molded resin article and Method for laser welding using same - Google Patents
Polyester resin composition for laser welding, Molded resin article and Method for laser welding using same Download PDFInfo
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- KR20160072716A KR20160072716A KR1020140180735A KR20140180735A KR20160072716A KR 20160072716 A KR20160072716 A KR 20160072716A KR 1020140180735 A KR1020140180735 A KR 1020140180735A KR 20140180735 A KR20140180735 A KR 20140180735A KR 20160072716 A KR20160072716 A KR 20160072716A
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/02—Halogenated hydrocarbons
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
- C09J167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C09J167/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl - and the hydroxy groups directly linked to aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/02—Inorganic materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/06—Organic materials
- C09K21/08—Organic materials containing halogen
Abstract
The present invention relates to a polyester resin composition comprising: (a) a polyester resin mixed with polybutylene terephthalate and polyethylene terephthalate; b) brominated flame retardants; c) antimony oxide flame retardant adjuvant; And d) a filler. The polyester resin composition is prepared by using only polyester-based resin without using amorphous polycarbonate-based resin or modified polyester-based resin added for conventional permeability, And has a high level of flame retardancy and heat resistance, so that it is useful as a resin composition for laser welding, and can be particularly useful for forming a transmission-side member in laser welding.
Description
TECHNICAL FIELD The present invention relates to a polyester resin composition for laser wearing, and relates to a laser-wearing polyester resin composition useful as a transmission side member for laser light because of its high transmittance of laser light and excellent flame retardancy and heat resistance.
BACKGROUND ART Polyester resins, for example, polybutylene terephthalate (PBT) resins are used in many applications because of their excellent properties such as heat resistance, chemical resistance, electrical properties, mechanical properties and molding processability. Representative examples include various electric vehicle parts (various control units, various sensors, ignition coils, etc.), connectors mounted on automobiles and electric appliances, switch parts, relay parts, coil parts, transformer parts, and lamp parts have. These parts often have a conductive part, and there is a risk of ignition due to a failure such as abnormal overheating or short-circuit, and improvement of flame retardancy is demanded.
Particularly, in order to improve the flame retardancy of a polyester-based resin such as a PBT-based resin, for example, in Japanese Patent Application Laid-Open No. 2000-256545 (Patent Document 1), a specific aromatic polyester, a brominated epoxy compound, And antimony trioxide in a specific ratio is disclosed as a flame retardant polyester resin composition. Thus, a method of manifesting flame retardancy by combination of a bromine compound and an antimony compound is widely known. Among them, in Japanese Patent Application Laid-Open No. 61-66746 (Patent Document 2), aromatic bromine compounds (brominated 5- to 10-substituted compounds of diphenyl ether, ethylene glycol diphenyl ether , Aromatic polycarbonates, monomers of epoxy compounds, bromides of these polymers, bromides of polystyrene oligomers, brominated cyanuric acid ester compounds, etc.) and It is described that the melt heat stability of the flame-retardant polybutylene terephthalate composition can be improved by using antimony trioxide having an average particle diameter of 1 占 퐉 or more (preferably 2 占 퐉 or more, particularly 5 to 7 占 퐉) as a flame retarding auxiliary agent.
However, these publications do not mention the problem of the laser penetration of the flame retardant polyester resin composition and the problem of laser welding.
Most of the above-mentioned parts (molded products) are produced by joining a plurality of members (or parts), forming components, and then bonding them to other parts. As these bonding methods, Snap-fit, various welding methods (hot plate welding, ultrasonic welding, vibration welding, laser welding, etc.) are used. However, when an adhesive is used, the loss of the process time and the environmental load until the adhesive is cured is a problem, and screwing may cause a troublesome process or cost. Therefore, the welding method is most suitably used in the bonding method as described above. Examples of such welding methods include hot plate welding, ultrasonic welding, vibration welding, and laser welding. However, there is a risk of damage to the product due to heat or vibration.
Therefore, the joining method by laser welding is attracting attention as a welding method of various resin parts because there is no damage of the product due to heat or vibration accompanying welding, and the degree of penetration is very simple and easy.
However, since the polyester resin typified by the PBT resin has a problem that it is difficult to be worn because of low transmittance of the laser light, conventionally, the modified polyester resin or polyester resin and the polycarbonate which is a non- Improvement. However, such a polyester alloy has a disadvantage in that the flame retardancy of the polyester is insufficient, which is not suitable for application in the fields of electric and electronic devices and automobile parts.
A problem to be solved by the present invention is to provide a laser-wearing polyester resin composition exhibiting excellent laser transmittance and excellent flame retardancy and heat resistance.
Another object to be solved by the present invention is to provide a molded article produced using the polyester resin composition.
A further object of the present invention is to provide a laser welding method using the polyester resin composition.
In order to solve the problem according to the present invention,
a) a polyester resin comprising polybutylene terephthalate and polyethylene terephthalate; b) brominated flame retardants; c) Antimony antimony flame retardant adjuvant; And c) a filler.
According to one embodiment, the polybutylene terephthalate and the polyethylene terephthalate may be mixed in a weight ratio of 1: 3 to 3: 1.
According to one embodiment, the polyester resin composition comprises 10 to 60 parts by weight of a brominated flame retardant, based on 100 parts by weight of a) the polyester resin, c) 1 to 20 parts by weight of an antimony oxide flame retardant aid; And d) from 40 to 80 parts by weight of a filler.
According to one embodiment, the brominated flame retardant may be at least one selected from a brominated acrylic resin, a brominated styrene resin, a brominated polycarbonate resin, a brominated epoxy resin, and a brominated bisphenol A type phenoxy resin.
According to one embodiment, the antimony antimony flame retardant adjuvant may be at least one selected from the group consisting of 2 antimony trioxide, antimony trioxide, 2 antimony pentoxide, antimony acid alkali metal salt, antimony acid alkaline earth metal metal salt and ammonium antimonate.
According to one embodiment, the filler is selected from the group consisting of glass fibers, silica fibers, alumina fibers, silica-alumina fibers, aluminum silicate fibers, zirconium oxide fibers, potassium titanate fibers, whiskers such as silicon carbide, alumina, boron nitride, And may be at least one selected.
According to one embodiment, the polyester resin may further include at least one selected from the group consisting of a nucleating agent, a lubricant, a releasing agent, an antistatic agent, a colorant, a plasticizer and a dispersing agent as an additive.
In order to solve the other problems according to the present invention, there is provided a resin molded article produced using the above polyester resin composition.
According to one embodiment, the light transmittance of the resin molded article may be 5% or more.
According to one embodiment, the resin molded article may have a thermal deformation temperature of 160 DEG C or higher under the condition of 18.6 kg / cm < 2 >.
According to one embodiment, when the thickness of the resin molded article is 0.8 mm, the flame retardancy evaluation based on the UL94 standard may be V-0.
In order to solve still another problem according to the present invention, there is provided a laser welding method using the above polyester resin.
The wearable polyester resin for laser according to the present invention is excellent in both laser weldability and flame retardancy at a high level because it has good transparency even when amorphous polycarbonate resin and modified polyester are not used, It is excellent. The resin molded article produced by using the polyester resin composition according to the present invention is excellent in laser penetration and can maintain high flame retardancy even in thin molding. Therefore, the resin composite molded article bonded by laser welding by absorption of laser light Can be effectively obtained.
Hereinafter, the present invention will be described in detail.
The resin molded article produced from the polyester resin composition of the present invention not only provides a polyester resin composition excellent in laser light transmittance so that it can be used as a laser transmitting side component in the production of a molded resin composition by a laser welding process, By not using amorphous resins and modified polyesters which have been conventionally applied for transparency, it is possible to provide a polyester resin for laser wear that is excellent in mechanical properties, flame retardancy and heat resistance.
Specifically, the polyester resin composition according to the present invention comprises: a) a polyester resin comprising polybutylene terephthalate and polyethylene terephthalate; b) brominated flame retardants; c) antimony oxide flame retardant adjuvant; And d) a filler.
The polyester resin may be a polyester resin mixed with polybutylene terephthalate (PBT) and polyethylene terephthalate (PET), and the mixing ratio of the PBT and PET is 1: 3 to 3: 1 (PBT: PET).
The brominated flame retardant can be used without limitation as long as it is used in the industry. Examples of the brominated flame retardant include a brominated (meth) acrylic resin, a styrene bromide resin, a bisphenol polycarbonate bromide, a brominated epoxy resin, a brominated bisphenol A phenoxy At least one kind of brominated compound selected from resins can be used.
Specifically, the brominated compound is preferably at least one compound selected from the group consisting of hexabromocyclododecane, tetrabromocyclooctane, monochloropentabromocyclohexane, decabromodiphenyloxide, octabromodiphenyloxide, decabromodiphenylethane, ethylenebis Bis (tribromophenoxy) ethane, tris (tribromophenyl) cyanurate, tris (tribromophenoxy) triazine, tris (tribromoneoxy) Tetrabromobisphenol-A bis (allyl ether) and derivatives thereof, tetrabromobisphenol-A (TBA), tris (tribromophenyl) cyanurate, brominated epoxy oligomer, TBA-bis 2-hydroxyethyl ether), TBA-bis (2,3-dibromopropyl ether), TBA carbonate oligomer, TBA-epoxy oligomer or polymer Which may be one or more brominated compounds.
In the brominated compound, the ratio (weight ratio) of the bromine atom may be generally 30% by weight or more, for example, 35 to 90% by weight, preferably 55% 85% by weight.
The brominated compound may have a melting point or a softening point of 260 ° C or less.
The proportion of the bromine compound (b) may be, for example, 10 to 60 parts by weight, preferably 20 to 40 parts by weight relative to 100 parts by weight of the polyester resin (a). When the bromine compound is used in the above ratio, it is possible to efficiently realize the high flame retardancy and the excellent properties (mechanical characteristics, electrical characteristics, molding processability) inherent in the polyester resin.
The combination of the bromine compound and the antimony oxide described later can provide both the high flame retardancy and the laser permeability of the resin composition or the resin molded article.
Examples of the antimony oxide flame-retardant auxiliary include alkali metal salts such as antimony trioxide, antimony trioxide, antimony pentoxide, antimony pentoxide, antimony pentoxide and sodium antimonate, alkaline earth metal salts such as magnesium antimonate, and antimonates such as ammonium antimonate And the like.
According to the present invention, antimony trioxide, antimony pentoxide and sodium antimonate may be preferred. Further, the antimony oxide may be surface-treated with a surface treatment agent such as an epoxy compound, a silane compound, an isocyanate compound or a titanate compound.
The average particle diameter of the antimony oxide may be 2 占 퐉 or more, and may be, for example, 2 to 10 占 퐉, preferably 2.5 to 9 占 퐉, more preferably 3 to 8 占 퐉. When the particle diameter of the antimony oxide is larger than 10 mu m, it may be easily broken when mechanical stress is applied, and flame retardancy may be lowered. When the particle diameter is smaller than 2 mu m, the transmittance of the laser light can be lowered, The molding stability of the resin molded product may be impaired by decomposing the polyester-based resin or promoting the reaction between the polyester-based resin and the brominated flame retardant.
In the resin composition of the present invention, the proportion of the antimony oxide may be, for example, 1 to 20 parts by weight, preferably 1 to 10 parts by weight, based on 100 parts by weight of the polyester resin. If the blending amount is less than 1 part by weight, sufficient flame retardancy may not be exhibited. If the blending amount exceeds 20 parts by weight, the inherent mechanical properties and molding processing characteristics of the polyester-based resin may be deteriorated, or laser- Can be reduced.
The filler may be an inorganic fiber such as a fibrous filler such as glass fiber, silica fiber alumina fiber, silica-alumina fiber, aluminum silicate fiber, zirconium oxide fiber and potassium titanate fiber, silicon carbide, alumina, boron nitride, Wollastonite; , Acrylic resin such as aliphatic or aromatic polyamide, aromatic polyester, fluororesin, or polyacrylonitrile, or fiber or carbon fiber formed from rayon or the like; , And the like. According to one embodiment, an inorganic fiber filler may be preferred.
The average fiber diameter of the fibrous filler may be, for example, about 1 to 50 μm, preferably about 3 to 30 μm, and the average fiber length is, for example, 100 μm to 3 mm, To 1 mm.
Particularly, the cross-sectional shape of the glass fiber may be a round shape, an ellipse shape, a deformed ellipse such as eyebrow shape, a semicircle, an arc, a triangle, a rectangle, a trapezoid, and the like.
The filler may, if necessary, be pretreated with a conventional surface treatment agent.
The surface treatment agent may be selected from, for example, an epoxy compound, an isocyanate compound, a silane compound, a titanate compound, a functional compound such as a compound, and the like.
The proportion of the surface treating agent may be, for example, 0 to 10 parts by weight, preferably 0.05 to 5 parts by weight, based on 100 parts by weight of the filler.
In the polyester resin composition according to the present invention, the proportion of the filler may be 40 to 100 parts by weight, preferably 50 to 80 parts by weight, based on 100 parts by weight of the polyester resin.
If the ratio of the filler is excessive, the light transmittance of the laser may be decreased, and the weld strength may be lowered.
The polyester resin according to the present invention may further contain at least one selected from the group consisting of a nucleating agent, a lubricant, a releasing agent, an antistatic agent, a coloring agent, a plasticizer and a dispersing agent as additives in a range not greatly deteriorating the flame retardancy and laser permeability characteristics.
Of these additives, a nucleating agent can be used to suppress the unevenness of the laser light transmittance, and an antioxidant can be used for heat resistance, or a release agent can be used for releasing property and moldability.
As the nucleating agent, an organic nucleating agent such as rosin or an inorganic nucleating agent may be used. Examples of the inorganic nucleating agent include metal oxides such as silica, alumina, zirconium oxide, titanium oxide, iron oxide and zinc oxide, calcium carbonate, magnesium carbonate, Metal carbides such as silicon carbide, silicon nitride, boron nitride, metal nitride such as tantalum nitride, and the like, and may be selected from the group consisting of metal oxides such as calcium carbonate, calcium silicate, aluminum silicate and talc, Can be used in combination.
The nucleating agent may be in the form of a granule or a plate.
The average particle diameter of the nucleating agent may be, for example, about 0.01 to 10 μm, preferably about 0.02 to 5 μm, and the content of the nucleating agent may be, for example, about 100 parts by weight of the polyester resin (a) 0.001 to 5 parts by weight, preferably 0.01 to 3 parts by weight.
The antioxidant may be at least one selected from common antioxidants, for example, hindered phenol antioxidants, hindered amine antioxidants, and hydroquinone antioxidants.
As the hindered phenol-based antioxidant, a screw or tetrakis of an aliphatic polyhydric alcohol such as glycerin tris or pentaerythritol tetrakis may be used alone or in combination with another antioxidant.
The ratio of the antioxidant may be, for example, 0.005 to 3 parts by weight, preferably 0.01 to 1.5 parts by weight, more preferably 0.05 to 0.5 parts by weight based on 100 parts by weight of the polyester resin (a).
Examples of the releasing agent include higher fatty acids such as C10-30 saturated or unsaturated fatty acids such as stearic acid, montanic acid and oleic acid, (poly) alkylene glycols such as ethylene glycol and polyethylene glycol, glycerin, trimethylolpropane, Esters, paraffins, micro waxes, polyolefin waxes, waxes such as polyethylene waxes and polypropylene waxes, and the like can be used.
Specific examples of the esters include glycerin fatty acid esters such as (poly) alkylene glycol fatty acid esters such as ethylene glycol distearate and polyethylene glycol monolaurate, glycerin monostearate, glycerin palmitate and the like, trimethylolpropane Trimethylolpropane fatty acid esters such as monopalmitic acid ester, and pentaerythritol fatty acid esters such as pentaerythritol stearic acid ester, sorbitan fatty acid esters such as sorbitan monostearate, and the like.
The above releasing agents may be used alone or in combination of two or more.
The ratio of the releasing agent may be, for example, 0.005 to 3 parts by weight, preferably 0.01 to 1.5 parts by weight based on 100 parts by weight of the polyester resin (a).
Examples of the colorant include inorganic or organic salt pigments, specifically, inorganic pigments such as cadmium yellow, yellow pigments such as organic pigments such as benzidine yellow; Isochromic pigments such as Chinese charcoal yellow; Inorganic pigments such as red pigments, and organic pigments such as rake red; Blue pigments such as inorganic pigments such as cobalt blue and organic pigments such as phthalocyanine blue; Inorganic pigments such as chrome green, and organic pigments such as phthalocyanine green; Violet dye pigments, and the like. These pigments may be used singly or in combination of two or more.
The content of the colorant in the polyester resin composition according to the present invention may be 0.001 to 5 parts by weight, preferably 0.01 to 2 parts by weight, based on 100 parts by weight of the polyester resin (a).
From the viewpoint of laser weldability, the melting point of the flame-retardant polyester resin produced from the polyester-based resin composition having the above composition is, for example, 190 ° C or higher, preferably 200 to 260 ° C, Lt; 0 > C.
The intrinsic viscosity (IV) of the flame-retardant polyester resin can be selected from the range of, for example, about 0.5 to 1.3 dl / g, preferably 0.6 to 1.2 dl / g, 1.0 dl / g. If the intrinsic viscosity is too low, the mechanical strength may be lowered, and if it is too high, the flowability and moldability may be deteriorated.
The PET and the PBT constituting the polyester resin (a) according to the present invention may be produced by a common method, for example, by ester exchange, direct esterification, or the like. For example, the PBT-based resin can be produced by copolymerizing terephthalic acid or a reactive derivative thereof with 1,4-butanediol and an optionally copolymerizable monomer in the above-mentioned conventional method.
The resin composition of the present invention comprises a polyester resin (a) containing PBT and PET in a predetermined ratio, a brominated flame retardant (b), an antimony based flame retardant adjuvant (c), and (d) By adding the resin composition and, if necessary, other components, and mixing or kneading (melting and kneading) by a conventional method.
As a method for mixing the polyester resin composition, for example, a mixture mixed by a mixing device such as a mixer type mixer, a V type blender and a tumbler type mixer is placed in a Banbury mixer mixer, a kneader, a roll, , A special single-screw extruder, a twin-screw extruder, or a multiaxial three-axis compressor or the like. In addition, an additive such as a flame retardant may be added during the kneading step in a melt kneading apparatus such as an extruder.
For example, (1) mixing each component and preparing a kneaded and extruded pellet by means of a uniaxial or biaxial extruder; (2) preparing pellets having different compositions (master batch), mixing the pellets in a predetermined amount and molding them to obtain a molded article having the above composition; (3) preparing a resin composition by directly dipping one or more of each component into a molding machine.
The resin molded article produced by using the resin composition of the present invention is excellent in flame retardancy and shows V-0 of the flame retardancy evaluation item based on UL94 standard (subject 94 of Andalitez, Labore retreat) at a thickness of 1 mm. The resin molded article has a high flame retardancy even in the case of thin molding so that the thickness of the molded article is 1 mm or less, for example, 0.6 to 1 mm, preferably 0.7 to 0.9 mm, and the flame retardancy evaluation V-0 Can be satisfied.
Further, the flame-retardant resin molded article can be used as a member (transmission side member) having a high laser light transmittance and transmitting laser light in laser welding, and the laser light transmittance of the resin molded article is preferably 5% Can be more than 9%.
Heat distortion temperature (HDT) of the resin molded article is ASTM may be measured by D648 method, the thermal deformation temperature of a resin molded article according to the invention shows a more than 160 ℃ heat distortion temperature under the conditions of 18.6 kg / cm 2, preferably Lt; RTI ID = 0.0 > 180 C. < / RTI &
The tensile strength of the resin molded article can be measured by the ASTM D638 method, and the tensile strength according to the present invention may be 1000 kgf / cm 2 or more.
The resin molded article according to the present invention is used for forming a transmission side member in laser welding. The resin molded article can be used in a laser welding method in which the resins can be brought into contact with a resin capable of absorbing laser light through the transmission of laser light, and it is possible to manufacture a resin molded article using the laser welding method.
The type of the laser beam is not particularly limited, and for example, a laser beam having a wavelength of 600 to 2000 nm, preferably 700 to 1500 nm, and preferably 800 to 1100 nm may be used.
As the laser light source usable for laser welding of the molded product, for example, a gas laser such as a dye laser, an excimer laser, an argon laser, a krypton laser, a helium-neon laser, a solid laser such as a YAG laser, .
The laser scanning speed for preventing welding defects and for increasing the welding strength in the laser welding method is 0 to 150 mm / sec, preferably 1 to 100 mm / sec, preferably 2 to 50 mm / Sec. ≪ / RTI >
As described above, the polyester-based resin composition of the present invention can be produced by using only polyester-based resin without using amorphous polycarbonate-based resin or modified polyester-based resin added for conventional permeability, And a polyester resin having a high flame retardancy and heat resistance can be obtained. The resin molded article can be used for various applications such as electric-electronic parts, offices, and the like in order to have excellent laser light transmittance and high flame retardancy. It can be applied to laser welding of automation (OA) parts, home appliance parts, machine parts, and automobile parts. The polyester resin may be particularly suitable for laser welding methods such as automobile electric parts, motor parts, various sensor parts, connector parts, switch parts, relay parts, coil parts, transformer parts, and lamp parts.
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.
<Examples>
The polyester, the brominated flame retardant, the flame-retardant aid and the oxidizer were blended in the ratios shown in Table 1 below and mixed uniformly in a V blender. The mixture was melt-mixed at a temperature of 260 캜 using a 30 mm? Twin-screw extruder, cooled and cut to prepare polyester resin pellets of Examples 1 to 3.
The prepared pellets were injected from an extruder under a flat profile condition at an injection temperature of 280 ° C to prepare specimens having a thickness of 3.2 mm, a length of 12.7 mm and a dog-bone shape.
<Comparative Example>
Except that a polyester-based resin composition having the ratios shown in the following Table 1 was used.
The components used in Table 1 are as follows.
PBT: polybutylene terephthalide (Tunhe 6082)
PET: Polyethylene terephthalate (SK Chemical, BB8055)
PC: Polycarbonate (Greak Lakes Solutions, BC-58)
PCTG: glycol-modified polycyclohexylenedimethylene terephthalate (SK Chemical, JN100)
Brominated flame retardant (Greak Lakes Solutions, BC-58)
<Experimental Example>
Measurement of tensile strength
The tensile strengths of the specimens prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were measured by the ASTM D638 method.
Measurement of heat distortion temperature
The heat distortion temperature (HDT) of the specimens prepared in Examples 1 to 3 and Comparative Examples 1 to 3 can be measured by the ASTM D648 method and the results measured under the load conditions of 18.6 kg / cm 2 are shown in Table 3 Respectively.
Measurement of light transmittance
The light transmittances of the specimens prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were measured by Hazemeter (Murakami Color Research Laboratory, HM-150).
Flammability evaluation
The flame retardancy of the specimens prepared in Examples 1 to 3 and Comparative Examples 1 to 3 can be evaluated by a flame retardancy evaluation method based on the UL94 standard (subject 94 of Andaraites Labora Retrieved) The flame retardancy can be evaluated by using the criteria shown in the following Table 2 as a method for evaluating the flame retardancy from the time of flushing and dripping after the flushing for 10 seconds. In this case, the time of the flushing is the length of time that the specimen continues to be flame-burned after the distance to the ignition source is kept away, and the flushing by dripping is performed by dripping from the specimen, It is determined by being ignited by water. The results evaluated by the above method are shown in Table 3 below.
The measurement results of the above measurement method are shown in Table 3 below.
(kgf / cm 2 )
(° C, 18.6 kg / cm 2 )
(0.8 mm)
From the above results, it is possible to produce a resin molded article having high permeability while maintaining the tensile strength and the flame retardancy without adding the modified polyester and the amorphous polycarbonate from the polyester resin composition according to the present invention, By using only the ester, it is possible to produce a resin molded article which can effectively maintain the heat resistance and the mechanical properties.
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 thereby. something to do. It is therefore intended that the scope of the invention be defined by the claims appended hereto and their equivalents.
Claims (13)
b) brominated flame retardants;
c) antimony oxide flame retardant adjuvant; And
d) filler
Wherein the polyester resin is a polyester resin.
Wherein the polybutylene terephthalate and the polyethylene terephthalate are mixed in a weight ratio of 1: 3 to 3: 1 of the polybutylene terephthalate and the polyethylene terephthalate.
Based on 100 parts by weight of a) polyester resin,
b) 10 to 60 parts by weight of a brominated flame retardant;
c) 1 to 20 parts by weight of an antimony oxide flame retardant aid; And
d) 40 to 80 parts by weight of a filler.
Wherein the brominated flame retardant is at least one selected from a brominated methacrylic resin, a brominated styrene resin, a brominated bisphenol polycarbonate, a brominated epoxy resin, and a brominated bisphenol A type phenoxy resin.
Wherein the antimony antimony flame retardant auxiliary is at least one selected from the group consisting of antimony trioxide, antimony trioxide, antimony pentoxide, antimony acid alkali metal salt, antimony acid alkaline earth metal salt and ammonium antimonate.
Wherein the filler is at least one selected from the group consisting of glass fiber, silica fiber, alumina fiber, silica-alumina fiber, aluminum silicate fiber, zirconium oxide fiber, potassium titanate fiber, silicon carbide, alumina, boron nitride and wollastonite Wherein the polyester resin composition is a polyester resin composition.
Wherein the resin composition further comprises at least one selected from the group consisting of a nucleating agent, a lubricant, a releasing agent, an antistatic agent, a colorant, a plasticizer and a dispersing agent as an additive.
Wherein the resin molded article has a light transmittance of 5% or more.
Wherein the resin molded article has a thermal deformation temperature of 160 DEG C or higher under the condition of 18.6 kg / cm < 2 >.
And the flame retardancy evaluation based on the UL94 standard satisfies V-0 when the thickness is 0.8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140180735A KR20160072716A (en) | 2014-12-15 | 2014-12-15 | Polyester resin composition for laser welding, Molded resin article and Method for laser welding using same |
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| KR1020140180735A KR20160072716A (en) | 2014-12-15 | 2014-12-15 | Polyester resin composition for laser welding, Molded resin article and Method for laser welding using same |
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| KR20160072716A true KR20160072716A (en) | 2016-06-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200078756A (en) * | 2018-12-21 | 2020-07-02 | 주식회사 삼양사 | White-colored opaque laser weldable thermoplastic composition with excellent thermal dimensional stability |
| WO2023068481A1 (en) * | 2021-10-18 | 2023-04-27 | (주) 엘지화학 | Polyester resin composition, method for producing same, and molded product produced therefrom |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166746A (en) | 1984-09-10 | 1986-04-05 | Polyplastics Co | Flame-retardant polybutylene terephthalate composition |
| JP2000256545A (en) | 1999-01-05 | 2000-09-19 | Teijin Ltd | Flame retardant polyester resin composition, molded product using the same and production of the composition |
-
2014
- 2014-12-15 KR KR1020140180735A patent/KR20160072716A/en not_active Application Discontinuation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166746A (en) | 1984-09-10 | 1986-04-05 | Polyplastics Co | Flame-retardant polybutylene terephthalate composition |
| JP2000256545A (en) | 1999-01-05 | 2000-09-19 | Teijin Ltd | Flame retardant polyester resin composition, molded product using the same and production of the composition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200078756A (en) * | 2018-12-21 | 2020-07-02 | 주식회사 삼양사 | White-colored opaque laser weldable thermoplastic composition with excellent thermal dimensional stability |
| WO2023068481A1 (en) * | 2021-10-18 | 2023-04-27 | (주) 엘지화학 | Polyester resin composition, method for producing same, and molded product produced therefrom |
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