JP2663585B2 - Liquid crystal polymer composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a liquid crystal polymer composition having excellent heat resistance, fluidity and rigidity.

<Prior art> In recent years, there has been an increasing demand for higher performance plastics, and a large number of polymers having various new properties have been developed and marketed. Among others, the polymers are characterized by a parallel arrangement of molecular chains. Attention has been paid to optically anisotropic liquid crystal polymers for their excellent mechanical properties.

Examples of the polymer forming the anisotropic molten phase include a liquid crystal polymer obtained by copolymerizing p-hydroxybenzoic acid with polyethylene terephthalate (JP-A-49-72393), p-hydroxybenzoic acid and 6-hydroxy-2-naphthoe A liquid crystal polymer obtained by copolymerizing an acid (Japanese Patent Laid-Open No. 54-77691) and a liquid crystal polymer obtained by copolymerizing p-hydroxybenzoic acid with 4,4'-dihydroxybiphenyl, terephthalic acid and isophthalic acid (Japanese Patent Publication No. 57-24407) No. 1).

As a liquid crystal polyester resin composition, a composition comprising a liquid crystal polyester containing a naphthalene moiety and a liquid crystal polyester derived from 1,2-bis (phenoxy) ethane-4,4'-dicarboxylic acid is known. (JP-A-57-40550).

On the other hand, thermoplastic resins other than liquid crystal polymers are generally inferior in fluidity and rigidity to liquid crystal polymers.

In order to improve this, it has been proposed to add a liquid crystal polymer to a thermoplastic resin to form a composition (Japanese Patent Laid-Open No. 56-11 / 1981).
No. 5357, JP-A-57-51739, etc.).

<Problems to be Solved by the Invention> However, Japanese Patent Application Laid-Open Nos.
No. 4-77691, the liquid crystal polymer described in JP-B-57-24407 and the completely aromatic polyester used in the composition described in JP-A-57-51739 have a heat distortion temperature of 190 ° C. The heat resistance is insufficient and the heat distortion temperature is 190 ° C or higher and the heat resistance is good, but the liquid crystal starting temperature is too high and molding cannot be performed unless the temperature is 400 ° C or higher, and the melt viscosity is high. It does not have a balance between heat resistance, moldability, and fluidity, and further improvement in rigidity has been required. Further, it has been pointed out that the surface of the molded product is peeled off by friction.

The composition comprising two kinds of liquid crystal polyesters having a specific structure known in JP-A-57-40550 has insufficient rigidity, and when blended with a thermoplastic resin, the composition with the thermoplastic resin has Due to poor affinity, the effect of improving the properties of the thermoplastic resin was also insufficient.

Further, the liquid crystal polymers known in JP-A-56-115357 and JP-A-57-51739 have a problem that compatibility with a thermoplastic resin is low and strength is largely reduced.

An object of the present invention is to solve the above problems and to obtain a liquid crystal polymer composition having excellent heat resistance, fluidity, rigidity, mechanical properties, and peel resistance.

<Means for Solving the Problems> The present inventors have made intensive studies to solve the above problems, and as a result, have reached the present invention.

That is, the present invention comprises the following structural unit (I) or [(I) + (II) + (III)] and has a heat distortion temperature of 1
A liquid crystal polymer composition in which two or more liquid crystal polymers at 90 to 280 ° C. are blended, and at least one polymer is [(I) ′ +
(II) ′ + (III) ′ + (IV) ′]. OYR (II) (However, X in the formula is And Y is —CH ₂ CH ₂ — represents one or more groups selected from Where R is O or NH and Y is Otherwise, it is O. Further, the carbonyl groups of the structural unit (III) have a para- and / or meta-position with each other. The structural units (II) and (III) are substantially equimolar. ) OX'-R ... (III) ' (Where X 'is X ′ represents one or more groups selected from —CH ₂ CH ₂ — R is O or NH, and X ′ is Otherwise, it is O. The carbonyl groups of the structural unit (IV) 'have a para- and / or meta-position with each other, and 50 mol% or more of the carbonyl groups are in the para-position. The structural unit [(II) ′ + (III) ′] and the structural unit (IV) ′ are substantially equimolar. And 99 to 1% by weight of the above liquid crystal polymer composition and 1 to 99% by weight of another thermoplastic resin.

The copolymerization amount of the structural units (I), (II) and (III) is arbitrary, but the following copolymerization amount is preferred from the viewpoint of fluidity. That is, the structural unit (I) is represented by [(I) + (I
I)] is preferably 30 to 100 mol%, particularly 50 to 100 mol%.
Preferably it is 100 mol%. In particular, when the structural unit (I) is 90 to 100 mol% of [(I) + (II)], 10 to 50 mol% of X is It is preferred that The structural unit (III) is substantially equimolar to the structural unit (II).

The copolymerization amount of the structural units (I) ', (II)', (III) 'and (IV)' is arbitrary, but is preferably the following copolymerization amount from the viewpoint of fluidity. That is, the structural unit (I) ′ is represented by [(I) ′ + (II) ′ + (III) ′]
It is preferably from 90 to 90 mol%, particularly preferably from 60 to 80 mol%. Further, the structural unit (II) ′ /
(III) 'molar ratio of preferably from 4.5 / 1 to 1/9, wherein the structural unit (III)' in -X'- is -CH ₂ CH ₂ - is otherwise 7.5 / 2.5 to 4/6 in particular preferable.

Among them, the copolymerization ratio of the structural unit (I) ′ is 72 to 78 mol% of [(I) ′ + (II) ′ + (III) ′],
When the copolymerization ratio of (II) ′ is [(I) ′ + (II) ′ + (II
5) to 15 mol% of (I) '] and 10 to 20 mol% of ((I)' + (II) '+ (III)']
In more than 70 mole% of -X'- is -CH ₂ CH ₂ - and most preferably. The structural unit (IV) 'is substantially equimolar to the structural unit [(II)' + (III) '].

The heat distortion temperature of the liquid crystal polymer in the present invention is 190 to 280 ° C., preferably 190 to 260 ° C. from the balance between heat resistance and fluidity.
° C, particularly preferably 190-220 ° C. Here, the heat distortion temperature is 18.6k for a 1/8 "thick test piece based on ASTM D648 standard.
This is a value measured at a stress of g / cm ² .

The liquid crystal onset temperature of the liquid crystal polymer in the present invention is not particularly limited, but is preferably from 250 to 320 ° C, particularly preferably from 260 to 280 ° C, from the balance between heat resistance and fluidity.

The melt viscosity of the liquid crystal polymer in the present invention is not particularly limited, but is preferably 10,000 poise or less, particularly preferably 5,000 poise or less, and most preferably 3,000 poise or less from the viewpoint of moldability and fluidity.

The melt viscosity is a value measured by a Koka type flow tester under the condition of (liquid crystal onset temperature + 40 ° C.) and a shear rate of 1,000 (1 / second).

The method for producing the liquid crystal polymer comprising the structural unit is not particularly limited, and can be produced according to a known polymer polycondensation method.

For example, in the structural unit (II) or (III) ′,
Otherwise the following (1) ~ (4), - - -Y- or -X'- is -CH ₂ CH ₂ Y- or -X'- is -CH ₂ CH ₂ - in the case of (5) A production method is preferably mentioned.

(1) p-acetoxybenzoic acid, 6-acetoxy-2-
Deacetic acid polycondensation reaction from acylated aromatic oxycarboxylic acid such as naphthoic acid, diacylated aromatic dihydroxy compound such as 4,4'-diacetoxybiphenyl, paraacetoxybenzene and aromatic dicarboxylic acid such as terephthalic acid How to make.

(2) p-hydroxybenzoic acid, 6-hydroxy-2-
After reacting acetic anhydride with an aromatic oxycarboxylic acid such as naphthoic acid, an aromatic dihydroxy compound such as 4,4'-dihydroxybiphenyl, and hydroquinone, and an aromatic zirconic acid such as terephthalic acid to acylate a phenolic hydroxyl group , A production method by a deacetic acid polycondensation reaction.

(3) 6-hydroxy-2-p-hydroxybenzoic acid
A method of producing from a phenyl ester such as naphthoic acid, an aromatic dihydroxy compound such as 4,4'-dihydroxybiphenyl or hydroquinone and a diphenyl ester of an aromatic dicarboxylic acid such as terephthalic acid by a phenol-elimination polycondensation reaction.

(4) p-hydroxybenzoic acid, 6-hydroxy-2-
A desired amount of diphenyl carbonate is reacted with an aromatic dicarboxylic acid such as naphthoic acid and terephthalic acid to form a diphenyl ester, and then an aromatic dihydroxy compound such as 4,4'-dihydroxybiphenyl and hydroquinone is added, followed by dephenol polycondensation. A method of producing by reaction.

(5) A method of producing by the method of (1) or (2) in the presence of polyethylene terephthalate.

The use of the method (2) is more preferable because a liquid crystal polymer having a high degree of polymerization can be obtained.

Typical catalysts used in the polycondensation reaction include metal compounds such as stannous acetate, tetrabutyl titanate, potassium acetate, antimony trioxide, magnesium, sodium acetate, and zinc acetate. It is effective for

Some liquid crystal polymers composed of the above structural units can measure the logarithmic viscosity in pentafluorophenol, in which case the value measured at 60 ° C. at a concentration of 0.1 g / dl is used.
0.5 dl / g or more is preferable, and 1.0 to 15.0 dl / g is particularly preferable.

When the polycondensation of the liquid crystal polymer comprising the structural unit, in addition to the above components, 4,4'-diphenylcarboxylic acid, 3,3'-diphenyldicarboxylic acid, 3,4'-diphenylcarboxylic acid, 2 , 2'-diphenyldicarboxylic acid, 1,2
-Bis (phenoxy) ethane-4,4'-dicarboxylic acid,
Aromatic dicarboxylic acids such as 1,2-bis (2-chlorophenoxy) ethane-4,4'-dicarboxylic acid; alicyclic dicarboxylic acids such as hexahydroterephthalic acid; aromatic dihydroxy compounds such as resorcin; m-oxy Aromatic oxycarboxylic acids such as benzoic acid, and p-aminobenzoic acid and the like can be further copolymerized in a small proportion that does not impair the object of the present invention.

Further, the liquid crystal polymer composition comprising the above two or more liquid crystal polymers has good compatibility with the following thermoplastic resin, and can improve the properties of the thermoplastic resin.

Thermoplastic resin is not particularly limited, polyamide, polyoxymethylene, polycarbonate, polyarylene oxide, polyalkylene terephthalate, polyarylene sulfide, polysulfone, polyethersulfone,
Amorphous polyarylate, polyetheretherketone and the like are used.

Preferred specific examples of the thermoplastic resin include the following.

Examples of the polyamide include nylon 6, nylon 46, nylon 66, nylon 610, nylon 11, nylon 12, and the like, and copolymers thereof.

Polyoxymethylene includes polyoxymethylene homopolymers and copolymers in which the main chain is largely composed of oxymethylene chains.

Polycarbonates are based on hydrocarbon derivatives containing bis (4-hydroxyphenyl), bis (3,5-dialkyl-4-hydroxyphenyl) or bis (3,5-dihalo-4-hydroxyphenyl) substitution Polycarbonates are preferred, especially polycarbonates based on 2,2-bis (4-hydroxyphenyl) propane (bisphenol A).

Examples of polyarylene oxide include poly (2,6-dimethyl-1,4-phenylene) ether, 2,6-dimethylphenol / 2,4,6-trimethylphenol copolymer, 2,6-
And dimethylphenol / 2,3,6-triethylphenol copolymer.

Styrene-based resins such as polystyrene and high-impact styrene can be added to polyarylene oxide.

Examples of the polyalkylene terephthalate include polyethylene terephthalate and polybutylene terephthalate.

Examples of polyarylene sulfide include polyphenylene sulfide.

Structural formula as polysulfone And the like.

Structural formula as polyether sulfone And the like.

The amorphous polyarylate has the structural formula And the like.

As polyetheretherketone, the structural formula, And the like.

Among them, polyalkylene terephthalate and polyarylene sulfide are particularly preferably used.

The compounding ratio of the thermoplastic resin is 1 to 99% by weight based on 99 to 1% by weight of two or more liquid crystal polymer compositions, and the preferable compounding ratio is 95 to 5% by weight / 5 to 95% by weight, more preferably. 90/10% by weight / 10 to 90% by weight. The compounding ratio of the liquid crystal polymer composition and the thermoplastic resin is 99-1% by weight / 1-99% by weight
Within this range, the effect of improving heat resistance, fluidity and rigidity is increased.

Further, the liquid crystal polymer composition of the present invention further has heat resistance,
Reinforcing agents can be added to improve mechanical properties. Specific examples of the reinforcing material include fibrous, granular, and a mixture of both.

Glass fiber, shirasu glass fiber, alumina fiber, silicon carbide fiber, ceramic fiber,
Examples include inorganic fibers such as asbestos fibers, stone fibers, metal fibers (for example, stainless steel fibers), and carbon fibers. Examples of the granular reinforcing material include silicates such as walasteinite, sericite, kaolin, mica, clay, bentonite, asbestos, talc, and alumina silicate, and metal oxides such as alumina, silicon oxide, magnesium oxide, zirconium oxide, and titanium oxide. Carbonates such as calcium carbonate, magnesium carbonate, dolomite,
Examples thereof include sulfates such as calcium sulfate and barium sulfate, glass beads, boron nitride, silicon carbide, and Saroyan, and these may be hollow (for example, hollow glass fibers, glass microballoons, shirasu balloons, carbon balloons, and the like). ). If necessary, the above-mentioned reinforcing material may be used after being pre-treated with a coupling agent such as a silane-based or titanium-based coupling agent.

The liquid crystal polymer composition of the present invention may contain an antioxidant and a heat stabilizer (for example, hindered phenol, hydroquinone, phosphites and their substitutes), and an ultraviolet absorber to the extent that the object of the present invention is not impaired. Agents such as resorcinol, salicylate, benzotriazole,
Benzophenone, etc.), lubricants and release agents (montanic acid and its salts, esters, half esters thereof, stearin alcohol, stearamide, polyethylene wax, etc.), dyes (for example, nitrosine, etc.) and pigments (for example, cadmium sulfide, phthalocyanine, carbon black) ), And other additives such as a colorant, a flame retardant, a plasticizer, and an antistatic agent, and other thermoplastic resins.

The liquid crystal polymer composition of the present invention is preferably prepared by melt-kneading, and a known method can be used for melt-kneading.

For example, the composition can be melt-kneaded at a temperature of 200 to 400 ° C. using a Banbury mixer, a rubber roll machine, a kneader, a single-screw or twin-screw extruder, or the like to obtain a composition.

<Example> Hereinafter, the present invention will be described in detail with reference to examples.

Reference Example 1 466 parts by weight of p-hydroxybenzoic acid, 84 parts by weight of 4,4'-dihydroxybiphenyl, 480 parts by weight of acetic anhydride, 75 parts by weight of terephthalic acid and 130 parts by weight of polyethylene terephthalate having an intrinsic viscosity of about 0.6 dl / g The reaction vessel was equipped with a stirring blade and a distillation tube, and was subjected to deacetic acid polymerization under the following conditions.

First, under nitrogen atmosphere at 100-250 ° C for 5 hours,
After reacting at ~ 300 ° C for 1.5 hours, 0.3mm at 300 ° C for 1 hour
The pressure was reduced to Hg, and the reaction was further performed for 3.75 hours to complete the polycondensation. As a result, almost the theoretical amount of acetic acid was distilled out, and a resin having the following theoretical structural formula was obtained.

1 / m / n / o = 75/10/15/25 Also, as a result of placing this polyester on a sample stage of a polarizing microscope and raising the temperature to confirm the optical anisotropy, the liquid crystal onset temperature was 272 ° C. And showed good optical anisotropy.
The logarithmic viscosity of the polyester (measured in pentafluorophenol at a concentration of 0.1 g / dl at 60 ° C.) was 2.11 dl / g, and the melt viscosity at 312 ° C. and a shear rate of 1,000 / sec was 2,900 poise. The heat distortion temperature was 208 ° C. (the measuring method will be described later).

Reference Example 2 519 parts by weight of p-acetoxybenzoic acid, 184 parts by weight of 4,4'-diacetoxybiphenyl, 85 parts by weight of t-butyl hydroquinone diacetate, hydroquinone diacetate 1
9.4 parts by weight and 186 parts by weight of terephthalic acid were charged into a reaction vessel equipped with a stirring blade and a distillation
After reacting at ~ 340 ° C for 3.0 hours, the temperature is raised to 350 ° C, then 1.5mm
The system was decompressed to Hg, and further heated for 1.0 hour to carry out a polycondensation reaction to obtain a resin having the following theoretical structural formula.

1 / m / n / o / p = 72/17 / 8.5 / 2.5 / 28 This polyester was placed on a sample stage of a polarizing microscope, and the temperature was raised to confirm the optical anisotropy. Was 307 ° C., showing good optical anisotropy.
The logarithmic viscosity of this polyester (measured under the same conditions as in Reference Example 1) was 4.3 dl / g, and the melt viscosity at 347 ° C. and a shear rate of 1,000 / sec was 4,300 poise. The heat distortion temperature is 2
The temperature was 51 ° C (the measuring method is described later).

Reference Example 3 541 parts by weight of p-acetoxybenzoic acid, 184 parts by weight of 4,4'-diacetoxybiphenyl, 62 parts by weight of hydroquinone diacetate, 124 parts by weight of terephthalic acid, and 42 parts by weight of isophthalic acid were stirred with a stirring blade and a distillation tube. After the reaction was carried out at 250 to 360 ° C. for 3 hours under a nitrogen gas atmosphere, the pressure was reduced to 1 mmHg, and the mixture was further heated for 1 hour to complete the polycondensation, thereby obtaining a resin having the following theoretical structural formula. Obtained.

1 / m / n / o / p = 75/17/8 / 18.75 / 6.25 This polyester was placed on a sample stage of a polarizing microscope, and the temperature was raised to confirm the optical anisotropy. ° C and showed good optical anisotropy. The logarithmic viscosity of this polyester (measured under the same conditions as in Reference Example 1) is
The melt viscosity at 345 ° C. and a shear rate of 1,000 / sec was 3,500 poise. The heat distortion temperature was 264 ° C. (the measuring method will be described later).

Reference Example 4 690 parts by weight of 6-acetoxy-2-naphthoic acid, 166 parts by weight of terephthalic acid and p-acetoxyacetanilide 1
95 parts by weight and 0.2 parts by weight of sodium acetate were charged into a reaction vessel equipped with a stirring blade and a distilling tube, and then charged under a nitrogen gas atmosphere.
After reacting at 0-280 ° C for 1.5 hours, the temperature is raised to 320 ° C, then 0.3m
The pressure inside the system was reduced to mHg, and the system was further heated for 0.5 hour to carry out a polycondensation reaction, and a polymer melt was taken out and cooled. The structural formula of the polymer is as shown below.

1 / m / n = 75/25/25 This polymer was placed on a sample stage of a polarizing microscope, heated, and observed for optical anisotropy.
253 ° C., showing good optical anisotropy. The logarithmic viscosity of this polymer (measured under the same conditions as in Reference Example 1) is 4.82 dl / g
The melt viscosity at 300 ° C and a shear rate of 1,000 / sec is 9,800.
Poise. The heat distortion temperature was 207 ° C. (the measuring method will be described later).

Reference Example 5 72.58 parts by weight of p-acetoxybenzoic acid and 51.61 parts by weight of polyethylene terephthalate having an intrinsic viscosity of about 0.6 dl / g were charged into a reaction vessel equipped with a stirring blade and a distilling tube, and then charged under a nitrogen gas atmosphere at 200 to 250 parts by weight. After reacting at 250 ° C for 5 hours and at 250-280 ° C for 2 hours, the pressure was reduced to 0.6 mmHg at 280 ° C for 1 hour.
After reacting for an hour, almost the theoretical amount of acetic acid was distilled off, and a resin having the following theoretical structural formula was obtained.

1 / m / n = 60/40/40 Also, as a result of placing this polyester on a sample stage of a polarizing microscope and raising the temperature to confirm the optical anisotropy, the liquid crystal onset temperature was 240 ° C. High optical anisotropy.
The logarithmic viscosity of the polyester (measured under the same conditions as in Reference Example 1) was 0.71 dl / g, and the melt viscosity at 280 ° C. and a shear rate of 1,000 / sec was 810 poise. The heat distortion temperature is 6
The temperature was 4 ° C (the measurement method is described later).

Reference Example 6 In place of 72.58 parts by weight of p-acetoxybenzoic acid in Reference Example 5, 96.77 parts by weight and polyethylene terephthalate 51.61 were used.
Instead of 25 parts by weight, 25.81 parts by weight was charged and polymerization was carried out at 200 to 320 ° C. in the same manner as in Example 5 to obtain a resin having the following theoretical structural formula.

1 / m / n / = 80/20/20 The liquid crystal onset temperature of this liquid crystal polyester was 290 ° C., and the melt viscosity at 300 ° C. and a shear rate of 1,000 / sec was 1,500 poise. The heat distortion temperature was 148 ° C. (the measuring method will be described later).

Examples 1 to 7 After the liquid crystal polymer (A) of Reference Examples 1 to 4 and the liquid crystal polymer (B) of Reference Example 4 were dry-blended at a predetermined ratio, 300 to 3
The mixture was melt-kneaded and pelletized with a 30 mmφ twin screw extruder set at 50 ° C.

Sumitomo Nestal injection molding machine
40/25 (manufactured by Sumitomo Heavy Industries, Ltd.), 1/8 "x 1/2" x 5 "test piece and 1/8" thickness at a cylinder temperature of 300-350 ° C and a mold temperature of 90 ° C ASTM No. 1 dumbbell was molded. Tensile strength of a 1/8 ″ thick test piece was measured under the conditions of ASTM D638 using Tensilon UTM-100 manufactured by Toyo Baldwin Co., Ltd.

The thermal deformation temperature was measured using a thermal deformation temperature measuring device manufactured by Toyo Seiki Co., Ltd. (18.6 kg /
cm ²⁾ was measured.

 The results are shown in Table 1.

Comparative Examples 1 to 8 The liquid crystal polymer (A) of Reference Examples 1 to 3 and 5 to 6 and the liquid crystal polymer (B) of Reference Example 4 were injection molded in the same manner as in Examples 1 to 7, and evaluated. The results are shown in Table 1.

As can be seen from Table 1, the liquid crystal polymer compositions of the present invention of Examples 1 to 7 have higher tensile strengths than the liquid crystal polymers of Comparative Examples 1 to 8 and show a value higher than a mere arithmetic average. Excellent.

Examples 8 to 18 After the liquid crystal polymer (A) of Reference Example 1, the liquid crystal polymer (B) of Reference Example 4, and the thermoplastic resin (C) shown in Table 2 were dry-blended at a predetermined ratio, the temperature was set at 300 to 370 ° C. 30mmφ
Was melt-kneaded and pelletized.

Sumitomo Nestal injection molding machine
40/25 (manufactured by Sumitomo Heavy Industries, Ltd.), ASTM with a cylinder temperature of 300 to 370 ° C and a mold temperature of 90 to 180 ° C, 1/8 ″ thickness
No.1 dumbbell was molded. Then, the tensile strength was measured with an ASTM No. 1 dumbbell based on the ASTM D638 standard. Further, the test piece having a thickness of 1/8 ″ was rubbed by hand several times, and the presence or absence of surface peeling was visually determined. The results are shown in Table 2.

Comparative Examples 9 to 16 The liquid crystal polymers (A) of Reference Examples 1 and 4 to 6 and the thermoplastic resin (C) shown in Table 3 were injection molded and evaluated in the same manner as in Examples 8 to 18. The results are shown in Table 2.

As can be seen from Table 2, the liquid crystal polymer compositions of the present invention of Examples 8 to 18 have higher tensile strength than Comparative Examples 9 to 16 and have excellent mechanical properties. In addition, there was no peeling of the surface of the molded product as compared with Comparative Examples 9 to 16, and the peeling resistance was excellent.

<Effect of the Invention> According to the present invention, a liquid crystal polymer composition having excellent heat resistance, fluidity, rigidity, mechanical properties, and peeling resistance can be obtained by blending two or more liquid crystal polymers.

Furthermore, by blending the above liquid crystal polymer composition with a thermoplastic resin, mechanical properties such as tensile strength of the thermoplastic resin are improved, and a liquid crystal polymer composition having excellent peel resistance is obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location C09K 19/38 C09K 19/38

Claims (2)

(57) [Claims] The present invention comprises the following structural unit (I) or [(I) + (II) + (III)] and has a heat distortion temperature of 1
A liquid crystal polymer composition in which two or more liquid crystal polymers at 90 to 280 ° C. are blended, and at least one polymer is [(I) ′ +
(II) ′ + (III) ′ + (IV) ′]. OYR (II) (However, X in the formula is And Y is —CH ₂ CH ₂ — represents one or more groups selected from Where R is O or NH and Y is Otherwise, it is O. Further, the carbonyl groups of the structural unit (III) have a para- and / or meta-position with each other. The structural units (II) and (III) are substantially equimolar. ) OX'-R ... (III) ' (Where X 'is X ′ represents one or more groups selected from —CH ₂ CH ₂ — R is O or NH, and X ′ is Otherwise, it is O. The carbonyl groups of the structural unit (IV) 'have a para- and / or meta-position with each other, and 50 mol% or more of the carbonyl groups are in the para-position. The structural unit [(II) + (III) '] and the structural unit (IV)' are substantially equimolar. ) 2. The liquid crystal polymer composition according to claim 1, wherein
A liquid crystal polymer composition comprising 1% by weight and 1 to 99% by weight of another thermoplastic resin.