JP4952064B2 - Liquid crystalline resin composition and molded product comprising the same - Google Patents

Description

  The present invention relates to a liquid crystalline resin composition having high reflectance and whiteness and excellent thin-wall fluidity, and a molded article comprising the same.

  In recent years, light sources used in lighting, displays, and identification devices are changing from incandescent bulbs to LEDs (light emitting diodes), organic EL, etc., and these are used in IT equipment such as mobile phone backlights and LED reflectors. Yes. These IT devices are becoming smaller, thinner, and more complex in line with the trend toward lighter, shorter, and higher performance.

  For such LED applications, there is a high demand for whiteness, and so-called aromatic nylon such as nylon 46, 6T, and 9T has been used (for example, see Patent Document 1). In addition, a decrease in whiteness due to thermal discoloration has been a problem due to poor filling at a thin portion of the product and an increase in ambient temperature accompanying an increase in LED light emission luminance.

As a method of overcoming such a problem, a method of using a liquid crystalline resin as a base polymer has been proposed. For example, a method of adding titanium oxide to a liquid crystalline polyester resin (for example, Patent Document 2 and Patent Document 3). However, there is a problem that the whiteness is insufficient and the characteristics as a reflector cannot be obtained satisfactorily.
JP 2004-75994 A Japanese Patent Laid-Open No. 62-179780 JP 2004-277539 A

  The present invention has been achieved as a result of studying the solution of the problems in the prior art described above as an issue.

  Accordingly, an object of the present invention relates to a liquid crystalline resin composition having high reflectivity and whiteness and excellent thin-wall fluidity, and a molded product comprising the same.

  As a result of intensive studies to solve the above problems, the present inventors have found that by adding a specific type and range of filler to the liquid crystalline resin, it is possible to maintain thin-wall fluidity while improving whiteness, The present invention has been completed.

That is, the present invention
1. (A) Liquid crystalline resin obtained by blending 30 to 400 parts by weight of titanium oxide and (C) ultramarine and / or 0.001 to 1.0 parts by weight of cobalt oxide with respect to 100 parts by weight of liquid crystalline resin. A liquid crystal having a heat resistance deterioration (ΔYI) of 1.0 or less when a test piece obtained by injection-molding the liquid crystalline resin composition is heated at 150 ° C. for 2 hours. Resin composition ,
2 . (A), (B) and the total 100 parts by weight, (D) 1 Symbol mounting liquid resin composition by blending a fibrous filler 1-50 parts by weight of (C),
3 . (D) The liquid crystalline resin composition according to 2, wherein the fibrous filler is glass fiber and / or acicular aluminum borate whisker,
4 . 1 to 3, a molded article formed by molding the liquid crystalline resin composition according to any one of
5 . Minimum thickness of the molded article is 0.05 to 2.0 mm 4 wherein the molded article, and
6 . The molded article according to claim 4 or 5, wherein the molded article is a component around a light source of LED or organic EL .

  According to the present invention, as will be described below, a liquid crystalline resin molded product having excellent whiteness and thin wall fluidity can be obtained, so that the effect on ultra-small LED products is great.

  Examples of the liquid crystalline resin (A) used in the present invention include liquid crystalline polyesters and liquid crystalline polyester amides that form an anisotropic molten phase, and specific examples thereof include aromatic oxycarbonyl units and aromatic dioxy units. , A liquid crystalline polyester forming an anisotropic melt phase comprising a structural unit selected from an aromatic dicarbonyl unit, an ethylenedioxy unit, and the like, and the structural unit and an aromatic iminocarbonyl unit, an aromatic diimino unit, an aromatic Examples thereof include liquid crystalline polyesteramides that form an anisotropic molten phase composed of structural units selected from iminooxy units and the like.

  Examples of the liquid crystalline polyester forming the anisotropic melt phase are preferably liquid crystalline polyesters comprising the following structural units (I), (II) and (IV), (I), (II), (III ) And (IV) structural units, and (I), (III) and (IV) structural units.

(However, R1 in the formula is

  One or more groups selected from R2

One or more groups selected from In the formula, X represents a hydrogen atom or a chlorine atom, and the sum of the structural units (II) and (III) and the structural unit (IV) are substantially equimolar. )
The structural unit (I) is a structural unit of a polyester formed from p-hydroxybenzoic acid, and the structural unit (II) is 4,4′-dihydroxybiphenyl, 3,3 ′, 5,5′-tetramethyl. -4,4'-dihydroxybiphenyl, hydroquinone, t-butylhydroquinone, phenylhydroquinone, methylhydroquinone, 2,6-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 2,2-bis (4-hydroxyphenyl) propane and 4 , 4′-dihydroxydiphenyl ether selected from one or more aromatic dihydroxy compounds, the structural unit (III) is a structural unit generated from ethylene glycol, the structural unit (IV) is terephthalic acid, Isophthalic acid, 4,4′-diphenyldicarboxylic acid, 2,6 -Naphthalenedicarboxylic acid, 4,4'-diphenyl ether dicarboxylic acid, 1,2-bis (phenoxy) ethane-4,4'-dicarboxylic acid and 1,2-bis (2-chlorophenoxy) ethane-4,4'- Each of the structural units generated from one or more aromatic dicarboxylic acids selected from dicarboxylic acids is shown. Of these, R1 is

And R2 is

Are particularly preferred.

  Examples of liquid crystalline polyesteramides include 6-hydroxy-2-naphthoic acid, liquid crystalline polyesteramide formed from p-aminophenol and terephthalic acid, p-hydroxybenzoic acid, 4,4′-dihydroxybiphenyl and terephthalic acid. Examples thereof include liquid crystalline polyesteramides (Japanese Patent Laid-Open No. 64-33123) produced from acids, p-aminobenzoic acid and polyethylene terephthalate.

  The liquid crystalline polyester that can be preferably used in the present invention is a copolymer comprising the above structural units (I), (II) and (IV), or comprising (I), (II), (III) and (IV). It is a copolymer, and the copolymerization amount of the structural units (I), (II), (III) and (IV) is arbitrary. However, the following copolymerization amount is preferable from the viewpoint of fluidity.

  That is, when the structural unit (III) is included, the total of the structural units (I) and (II) is the structural units (I) and (II) from the viewpoint of heat resistance, flame retardancy and mechanical properties. 60-95 mol% is preferable with respect to the sum total of (III) and 75-93 mol% is more preferable. Further, the structural unit (III) is preferably 40 to 5 mol%, more preferably 25 to 7 mol%, based on the total of the structural units (I), (II) and (III). The molar ratio [(I) / (II)] of the structural unit (I) to the structural unit (II) is preferably 75/25 to 95/5 from the viewpoint of the balance between heat resistance and fluidity. Preferably it is 78 / 22-93 / 7. The structural unit (IV) is substantially equimolar to the sum of the structural units (II) and (III).

  On the other hand, when the structural unit (III) is not included, the structural unit (I) is preferably 40 to 90 mol% based on the total of the structural units (I) and (II) from the viewpoint of fluidity. 60 to 88 mol% is particularly preferable. The structural unit (IV) is substantially equimolar with the structural unit (II).

  In the above, “substantially equimolar” means that the unit constituting the polymer main chain excluding the terminal is equimolar of the dioxy unit and the dicarbonyl unit, but the unit constituting the terminal is not necessarily equimolar. Means not limited.

  In addition, when polycondensating the liquid crystalline polyester that can be preferably used in the present invention, in addition to the components constituting the structural units (I) to (IV), 3,3′-diphenyldicarboxylic acid, 2,2 ′ Aromatic dicarboxylic acids such as diphenyldicarboxylic acid, aliphatic dicarboxylic acids such as adipic acid, azelaic acid, sebacic acid and dodecanedioic acid, alicyclic dicarboxylic acids such as hexahydroterephthalic acid, chlorohydroquinone, methylhydroquinone, 4, Aromatic diols such as 4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfide, 4,4′-dihydroxybenzophenone, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,4 -Cyclohexanediol, 1,4-cyclohexane dimethyl In addition, an aliphatic group such as a diol, an alicyclic diol, an aromatic hydroxycarboxylic acid such as an m-hydroxybenzoic acid and a 2,6-hydroxynaphthoic acid, and the like are further added in a small proportion within a range that does not impair the object of the present invention. It can be polymerized. Further, examples of the liquid crystalline polyester amide preferably include those obtained by copolymerizing p-aminophenol and / or p-aminobenzoic acid with the above preferred liquid crystalline polyester.

  The method for producing the liquid crystalline resin in the present invention is not particularly limited, and can be produced according to a known polyester polycondensation method.

For example, in the production of the above-mentioned liquid crystalline polyester that is preferably used, when the structural unit (III) is not included, the production methods of the following (1) and (2) include the structural unit (III): ) Is preferably mentioned.
(1) Deacetic acid polycondensation reaction from diacylated products of aromatic dihydroxy compounds such as p-acetoxybenzoic acid and 4,4′-diacetoxybiphenyl, 4,4′-diacetoxybenzene, and aromatic dicarboxylic acids such as terephthalic acid A method for producing a liquid crystalline polyester.
(2) Acetic anhydride is reacted with aromatic dihydroxy compounds such as p-hydroxybenzoic acid and 4,4'-dihydroxybiphenyl and hydroquinone, and aromatic dicarboxylic acids such as terephthalic acid and isophthalic acid to acylate phenolic hydroxyl groups. And then producing a liquid crystalline polyester by a deacetic acid polycondensation reaction.
(3) In the presence of a bis (β-hydroxyethyl) ester of an aromatic dicarboxylic acid such as a polyester polymer such as polyethylene terephthalate, an oligomer, or bis (β-hydroxyethyl) terephthalate, by the method of (1) or (2) A method for producing a liquid crystalline polyester.

  Although these polycondensation reactions proceed even without a catalyst, it is sometimes preferable to add a metal compound such as stannous acetate, tetrabutyl titanate, potassium acetate and sodium acetate, antimony trioxide, and metal magnesium.

  Some (A) liquid crystalline resins in the present invention are capable of measuring logarithmic viscosity in pentafluorophenol. In that case, the value measured at 60 ° C. at a concentration of 0.1 g / dl is 0. 5 dl / g or more is preferable, and when the structural unit (III) is included, 1.0 to 3.0 dl / g is preferable, and when the structural unit (III) is not included, 2.0 to 10.0 dl / g is preferable. Is preferred.

  In addition, the melt viscosity of the (A) liquid crystalline resin in the present invention is preferably 1 to 2,000 Pa · s, and more preferably 2 to 1,000 Pa · s.

  In addition, said melt viscosity is the value measured with the Koka flow tester on condition of melting | fusing speed | rate (Tm) +10 degreeC of liquid crystalline resin, and the conditions of a shear rate of 1,000 / sec.

  Here, the melting point (Tm) refers to the endothermic peak temperature Tm1 observed when the polymer is measured by differential calorimetry at room temperature from 20 ° C./min, and then the temperature is increased to Tm1 + 20 ° C. This is the endothermic peak temperature observed when the temperature is kept at the same temperature for 5 minutes, then cooled to room temperature under a temperature drop condition of 20 ° C./min, and then measured again under a temperature rise condition of 20 ° C./min.

  As the (B) titanium oxide used in the present invention, a rutile type, anatase type, rutile and anatase type mixture can be used. From the viewpoint of heat resistance and thermal deterioration, it is preferable to use a rutile type. On the other hand, to increase the whiteness near the near ultraviolet side (380 to 420 nm), it is preferable to use an anatase type. If it judges comprehensively at present, it is preferable to use a rutile type.

The weight average particle diameter of (B) titanium oxide used in the present invention is 0.05 to 0.50 μm, preferably 0.1 to 0.4 μm, more preferably 0.2 to 0.35 μm.
As the particle size is larger, the whiteness is lowered.

  The (B) titanium oxide of the present invention is used in an amount of 40 to 400 parts by weight, preferably 50 to 300 parts by weight, more preferably 50 to 200 parts by weight, based on 100 parts by weight of the (A) liquid crystalline resin. (B) When there is too little titanium oxide, whiteness will fall, and when too much, thin-wall fluidity | liquidity will fall and it is unpreferable.

  As the (C) blue colorant used in the present invention, known colorants (inorganic pigments, organic pigments, dyes) can be used, and examples thereof include ultramarine blue, cobalt oxide, phthalocyanine blue, and anthraquinone blue. . Of these, ultramarine and cobalt oxide are preferred.

  The (B) blue colorant of the present invention is used in an amount of 0.001 to 1.0 part by weight, preferably 0.01 to 0.5 part by weight, and more preferably 0 to 100 parts by weight of the (A) liquid crystalline resin. 0.01 to 0.1 parts by weight are used. (B) When there is too little blue coloring, yellowness will raise, and when too much, whiteness will fall and it is unpreferable.

  The liquid crystalline resin composition of the present invention can be improved in reflectance and mechanical properties by further containing (D) an inorganic filler. Here, (D) inorganic filler refers to a fibrous filler (for example, glass fiber, milled glass fiber, carbon fiber, alumina fiber, silicon carbide fiber, ceramic fiber, asbestos fiber, gypsum fiber, whisker (for example, hoe). Aluminum whisker, potassium titanate whisker, gypsum whisker, etc.), metal fiber (eg, inorganic fiber such as stainless steel, magnesium fiber, copper fiber, etc.), scaly filler (eg, mica, talc, kaolin, glass flakes, straw) And a particulate filler (eg, spherical silica, calcium carbonate, glass bead calcium polyphosphate), and the like. Of these, fibrous fillers such as glass fiber, milled glass fiber and aluminum borate whisker are preferably used, more preferably milled glass fiber and aluminum borate whisker are used, and still more preferably aluminum borate whisker is used. It is done.

  The above (D) inorganic filler is usually 50 parts by weight or less with respect to a total of 100 parts by weight of (A), (B) and (C) from the viewpoint of molding processability and mechanical properties of the liquid crystalline resin composition. It is preferably used at 30 parts by weight or less, more preferably 20 parts by weight or less. Although there is no restriction | limiting in particular about a minimum, It is preferable to use 1 weight part or more.

The liquid crystalline resin molded product of the present invention is a range that does not impair the purpose of the liquid crystalline resin composition.
Antioxidants and heat stabilizers (such as hindered phenols, hydroquinones, phosphites and their substitutes), ultraviolet absorbers (such as resorcinol, salicylate, benzotriazole, benzophenone), release agents (such as montanic acid and its Salt, its ester, its half ester, stearyl alcohol, stearamide and polyethylene wax), plasticizer, flame retardant, flame retardant aid, antistatic agent and other usual additives and other thermoplastic resins (fluorine resin, etc.) Can be added to impart predetermined characteristics. In this case, since it is not preferable to easily inhibit the whiteness, attention should be paid to the type and the amount added.

  The liquid crystalline resin composition of the present invention is preferably produced by melt kneading, and a known method can be used for melt kneading. For example, a Banbury mixer, a rubber roll machine, a kneader, a single screw or twin screw extruder can be used. Among these, since the liquid crystalline resin composition of the present invention needs to improve the dispersion of (B) titanium oxide and (C) blue colorant, it is preferable to use an extruder. Is more preferable, and it is particularly preferable to use a twin-screw extruder having an intermediate addition port. In the melt-kneading method, (A) liquid crystalline resin is supplied from a raw material supply port to a twin-screw extruder, (A) the liquid crystalline resin is melted, and (A) liquid crystalline resin in the molten state is supplied from an intermediate addition port ( It is preferable to supply B) titanium oxide and (C) blue colorant. Furthermore, (D) the inorganic filler is a liquid crystalline resin composition comprising (A), (B) and (C) once in order to improve the dispersibility of (B) titanium oxide and (C) blue colorant. After pelletizing, it is preferable to supply this to a twin-screw extruder from a raw material share port, and to supply (D) inorganic filler from an intermediate addition port.

  The liquid crystalline resin composition of the present invention thus obtained has excellent thin-wall fluidity and does not impair mechanical properties, so it can be molded into various molded products by molding methods such as injection molding, extrusion molding, sheet molding, and blow molding. However, it is preferable to perform injection molding taking advantage of the excellent thin-wall fluidity.

  In addition, the liquid crystalline resin composition of the present invention can obtain a molded product having a thin-walled part by taking advantage of its excellent thin-wall fluidity and mechanical properties, and its substantial minimum thickness is 0.05 to 2.0 mm. The molded article having a thickness of preferably 0.1 to 1.0 mm, more preferably 0.2 to 0.8 mm can be preferably used.

  The liquid crystalline resin molded product of the present invention is not limited to applications such as electricity, electronics, automobiles, machinery, and miscellaneous goods, and can be used around components using LEDs (light emitting diodes) and organic EL.

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

[Reference Example 1]
870 parts by weight of p-hydroxybenzoic acid, 327 parts by weight of 4,4′-dihydroxybiphenyl, 89 parts by weight of hydroquinone, 292 parts by weight of terephthalic acid, 157 parts by weight of isophthalic acid and 1367 parts by weight of acetic anhydride (1. 03 equivalents) was charged into a reaction vessel equipped with a stirring blade and a distillation tube, and reacted for 2 hours while raising the temperature from room temperature to 145 ° C. with stirring in a nitrogen gas atmosphere, from 145 ° C. to 320 ° C. in 4 hours. The temperature rose. Thereafter, the polymerization temperature was reduced to 133 Pa at 320 ° C. for 1.0 hour, and the mixture was further stirred for about 1.5 hours to carry out polycondensation. The p-oxybenzoate unit is 70 molar equivalents relative to the sum of the p-oxybenzoate unit, 4,4′-dioxybiphenyl unit and 1,4-dioxybenzene unit, and 4,4′-dioxybiphenyl unit is 4 Melting point 314 ° C., melting point of 70 molar equivalents relative to the total of 4,4′-dioxybiphenyl units and 1,4-dioxybenzene units, 65 molar equivalents of terephthalate units relative to the total of terephthalate units and isophthalate units A liquid crystalline polyester (A1) having a viscosity of 25 Pa · s (324 ° C., orifice 0.5 mm diameter × 10 mm, shear rate 1,000 / sec) was obtained.

[Reference Example 2]
994 parts by weight of p-hydroxybenzoic acid, 168 parts by weight of 4,4′-dihydroxybiphenyl, 150 parts by weight of terephthalic acid, 173 parts by weight of polyethylene terephthalate having an intrinsic viscosity of about 0.6 dl / g, and 1011 parts by weight of acetic anhydride were stirred. Charged to a reaction vessel equipped with a blade and a distilling tube, stirred for 3 hours while raising the temperature from room temperature to 150 ° C. with stirring in a nitrogen gas atmosphere, heated from 150 ° C. to 250 ° C. in 2 hours, After raising the temperature to 335 ° C. over 1.5 hours, the pressure was reduced to 6.5 × 10 −3 Pa at 335 ° C. over 1.5 hours, and stirring was continued for about 0.25 hours to perform polycondensation. Melting point 328 ° C., melt viscosity 18 Pa · s (338 ° C., orifice 0) consisting of 80 molar equivalents of aromatic oxycarbonyl units, 10 molar equivalents of aromatic dioxy units, 10 molar equivalents of ethylene dioxy units, and 20 molar equivalents of aromatic dicarboxylic acid units A liquid crystalline polyester (A2) having a diameter of 0.5 mm × 10 mm and a shear rate of 1,000 / second was obtained.

[Reference Example 3]
According to Japanese Patent Laid-Open No. 54-77691, 921 parts by weight of p-acetoxybenzoic acid and 435 parts by weight of 6-acetoxy-naphthoic acid were charged into a reaction vessel equipped with a stirring blade and a distillation tube, and polycondensation was performed. Melting point 283 ° C. melt viscosity 30 Pa · s (293 ° C., orifice 0.5 mm diameter × 10 mm, consisting of 57 molar equivalents of structural units produced from p-acetoxybenzoic acid and 22 molar equivalents of structural units produced from 6-acetoxy-naphthoic acid, A liquid crystalline polyester (A3) having a shear rate of 1,000 / second was obtained.

[Examples 1-5, Comparative Examples 1-6]
Using a twin-screw extruder (TEX-44 manufactured by Nippon Steel Works) having an intermediate addition port with a diameter of 44 mm, in which the cylinder set temperature is the melting point of the liquid crystalline resin + 10 ° C. and the screw rotation speed is set to 250 rpm, Reference Examples 1 to (B) Titanium oxide and (C) Blue colorant were added from the raw material supply port in the proportions shown in Table 1 to 100 parts by weight of (A) liquid crystalline resin obtained in 3 to obtain a molten state, and if necessary (D) The fibrous filler was supplied from the intermediate addition port, and melt-kneaded at a discharge rate of 30 kg / hour to obtain pellets. The following properties were evaluated using this pellet. The results are shown in Table 1.

As (B) titanium oxide, (C) blue colorant and (D) fibrous filler, the following were used.
B: Titanium oxide (rutile type)
C1: Ultramarine C2: Cobalt (II) oxide
D1: Aluminum borate whisker (Shikoku Kasei Kogyo Co., Ltd. YS3A average fiber diameter 0.8 μm)
D2: Glass fiber (ECS790DE average fiber diameter 6 μm manufactured by Nippon Electric Glass Co., Ltd.)

[Characteristic measurement method]
(1) Reflectance Using a SE-30D molding machine manufactured by Sumitomo Heavy Industries, Ltd., injection molding was performed at a melting temperature of the liquid crystalline resin + 20 ° C. molding temperature and a mold temperature of 90 ° C., and the width was 40 mm and the length was 40 mm. A square plate specimen having a thickness of 1 mm was prepared. From the square plate specimen, the reflectance at 500 nm and 900 nm was measured using an ultraviolet near-infrared spectrophotometer (UV-3150 manufactured by Shimadzu Corporation) and an integrating sphere detector. In general, the shorter the wavelength, the harder it is to reflect. Therefore, the judgment criteria differ depending on the wavelength. At a wavelength of 500 nm, the reflectance is 70% or more “good” (◯), and the others are “poor”. ”(×), and those having a reflectance of 90% or more at a wavelength of 900 nm were defined as“ good ”(◯) and those having a reflectance of less than“% ”as“ poor ”(×).

(2) Color tone / whiteness (WI): The above-mentioned square plate test piece was measured using an SM color computer (manufactured by Suga Test Instruments Co., Ltd .: MODEL SM-5). A whiteness of 80 or more was evaluated as “good” (◯), and a whiteness of less than “low” (×).
Yellowness (YI): Measured by the same method as whiteness, those having a yellowness of 3.0 or less were evaluated as “good” (◯), and those higher than that were determined as “inferior” (×).
Heat-resistant deterioration (ΔYI): Square plate specimens were heat-treated at 150 ° C. for 2 hours, and the difference in yellowness before and after the heat treatment was defined as ΔYI. A case where ΔYI was 1.0 or less was evaluated as “good” (◯), and a case where it was higher than “Y” was evaluated as “poor” (×).

(3) Thin wall fluidity / flow length: using an SE-30D molding machine manufactured by Sumitomo Heavy Industries, Ltd., an injection speed of 300 mm / second, an injection pressure of 40 MPa, a molding temperature of the melting point of the liquid crystalline resin + 20 ° C., and a mold temperature of 90 Continuous molding (injection time / cooling time = 1.0 / 10.0 seconds, screw rotation speed 100 rpm, back pressure 1 MPa, suckback 10 mm) was performed under the conditions of ° C., and a rod-shaped test piece (width 12.7 mm, thickness 0. 5 mm, side gate 0.5 mm × 5.0 mm) was molded, and the length of the molded product was measured as the flow length. The longer the flow length, the better the thin wall fluidity. The flow length of 50 mm or more was “good” (◯), and the flow length was “poor” (×).

(4) Mechanical properties and tensile strength: Measured according to ASTM D638. Those having a tensile strength of 100 MPa or more were evaluated as “excellent” (◎), those having a tensile strength of 35 or more as “good” (◯), and those having a tensile strength lower than that as “inferior” (×).

  These results are shown in Table 1.

  From the above results, it can be seen that the liquid crystalline resin composition of the present invention is a composition having high reflectance and whiteness and excellent thin-wall fluidity as compared with the resin composition of the comparative example.

  Since the liquid crystalline resin composition of the present invention and a molded product comprising the same are high in reflectance and whiteness and excellent in thin-wall fluidity, it is suitably used for components around light sources such as LEDs (light emitting diodes) and organic ELs. be able to.

Claims (6)

(A) Liquid crystalline resin obtained by blending 30 to 400 parts by weight of titanium oxide and (C) ultramarine and / or 0.001 to 1.0 parts by weight of cobalt oxide with respect to 100 parts by weight of liquid crystalline resin. A liquid crystal having a heat resistance deterioration (ΔYI) of 1.0 or less when a test piece obtained by injection-molding the liquid crystalline resin composition is heated at 150 ° C. for 2 hours. Resin composition . The liquid crystalline resin composition according to claim 1, wherein 1 to 50 parts by weight of (D) fibrous filler is blended with 100 parts by weight of the total of (A), (B) and (C). The liquid crystalline resin composition according to claim 2, wherein (D) the fibrous filler is glass fiber and / or acicular aluminum borate whisker. The molded article formed by shape | molding the liquid crystalline resin composition in any one of Claims 1-3. The molded product according to claim 4, wherein the minimum thickness of the molded product is 0.05 to 2.0 mm. The molded article according to claim 4 or 5, wherein the molded article is a component around a light source of LED or organic EL.