JPH01193351A - Aromatic polyester composition - Google Patents

Abstract

PURPOSE:To obtain a resin composition providing molded articles having excellent fluidity, heat resistance and face impact resistance and multi-layer compounded molded articles having high interlaminar strength and high modulus of elasticity, by blending an aromatic polyester capable of forming an anisotropic melt phase with a specific amount of an olefinic copolymer. CONSTITUTION:100 pts.wt. aromatic polyester comprising a structural units shown by formula I- formula III (X is group shown by formula IV, formula V, etc.; Y is group shown by formula VI, etc.,) and capable of forming an anisotropic melt phase is blended with 0.1-60 pts.wt., preferably 0.5-20 pts.wt. olefinic polymer, a copolymer of an alpha-olefin and an alpha, beta-unsaturated glycidyl ester.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention can be melt-molded at 400° C. or lower and has excellent fluidity, heat resistance, and mechanical properties. In addition to providing molded products, multilayer composite molding also provides molded products with small thickness dependence of the modulus of elasticity of the molded product. The present invention relates to an aromatic polyester composition that can be provided.

Conventional technology> In recent years, the demand for higher performance plastics has increased, and many polymers with various new performances have been developed.
Among them, optically anisotropic liquid crystal polymers, which are characterized by parallel alignment of molecular chains, are attracting attention because of their excellent mechanical properties.

Examples of polymers that form an anisotropic melt phase include liquid crystal polymers obtained by copolymerizing p-hydroquine benzoic acid with polyethylene terephthalate (Japanese Patent Application Laid-open No. 72393/1983), p-
-Liquid crystal polymer made by copolymerizing hydroxybenzoic acid and 6-hydroquine-2-naphthoic acid (Japanese Patent Application Laid-open No. 77691/1983) Also, p-hydroxybenzoic acid, 4,4'-dihydroxypiphenyl, terephthalic acid, isophthalic acid Liquid crystal polymers (Japanese Patent Publication No. 57-24407, Japanese Patent Application Laid-open No. 60-25046) are known, which are copolymerized with the following.

<One point while the invention is trying to solve> These liquid crystal polymers are crystalline polymers that do not exhibit liquid crystallinity, such as polyethylene terephthalate and polybutylene terephthalate.
It was found that, compared to tallate, etc., it exhibits superior Izot impact strength due to its orientation during molding, but is on the contrary inferior in terms of surface impacts such as falling balls and falling @ impact.

Furthermore, it is known that these liquid crystal polymers yield injection molded articles with a high elastic modulus when the molded article is thin, but have a low elastic modulus when the molded article is thick. (W, J
, Jackson ll-11, J, Polym.

Sci, Polym, Chem,
Ed,, ↓4, 2043 (1976
)).

The present inventors have found that multilayer composite molding is effective in obtaining a high elastic modulus molded product even when the pre-molded product is thick, but many of these liquid crystal polymers do not require melt adhesion between layers. It was found that the multilayer composite molded product had poor properties and a high modulus of elasticity could not be obtained.

Therefore, the present invention aims to improve the mechanical properties, particularly the surface impact resistance, without impairing the fluidity and heat resistance of the aromatic polyester forming an anisotropic melt phase, and to improve the high elasticity with a large interlayer adhesion force. The objective is to obtain a multilayer composite molded product.

Means for Solving the Problems The inventors of the present invention have made extensive studies to solve the problems, and as a result, have arrived at the present invention.

That is, the present invention uses 0 parts of an olefin polymer for 100 Iau parts of an aromatic polyester which is composed of structural units returned from the following structural formula (11 to
．． An aromatic polyester composition containing 1 to 60 parts by weight.

(0-X-OC-Y-C)...
...(II)+o-z-c+
・・・・・・■C1 (, CI) indicates all of the above selected from -3 and 8, and Y indicates a group of -3 or more selected from The finding of the present invention that copolymers of olefins and glycidyl methacrylate and/or glycidyl acrylate improves the interlayer adhesion of multilayer composite molded products is completely unexpected from conventional knowledge.

The aromatic polyester forming an anisotropic melt phase that can be used in the present invention is preferably one that exhibits optical anisotropy at a temperature of 350° C. or lower.

In the aromatic polyester conveniently used in the present invention, the above 4D
t-structural unit (I) is methylhydroquinone, chlorohydroquinone, phenylhydroquinone, t-butylhydroquino/, hydroquinone, 4.4'-2hydroxybiphenyl, 4.4'-di and hydroxydiphenyl ether, 2.6- The structural unit of the polyester produced from cyhydroxynaphthalene, 2,7-cyhydroquinonaphthalene, n-1 or more dihydroxy/compounds, and 4,4'-diphenylene/acidate is the structural unit. (It) is one or more of the above-selected dihydroquine compounds;
-2-phenoxy)ethane-4,4'-dicarboxylic acid, I,2-bis(2-chlorophenoquine)ethane-4,
4'-dicarboxylic acid, terephthalic acid, isophthalic acid, 2
, 6-naphthalene dicarboxylic acid, 4,4'-diphenyl ether dicarboxylic acid 3, and 1,4-chlorohexanedicarboxylic acid. Also, the structural unit (
2) is p-hydroxybenzoic acid, 6-hydroxy-2-
naphthoe solution, 3-chloro-4-hydroxybenzoic acid, 3
- Shows the structural unit of polyester produced from one or more aromatic hydroxybenzoic acids selected from phenyl-4-hydroxybenzoic acid.

The above structural unit (1)/ ((1)±(ID) Ha20~
The amount is 100 mol%, preferably 70-100 mol%, and if it is less than 20 mol%, the effect of the present invention will be small.

In addition, the above structural unit (1) / ((1) + (ID+
(2) is preferably 20 to 100 mol%.

The aromatic polyester used in the present invention can be produced according to the conventional polyester polycondensation method, and there are no restrictions on the amount of polyester.
Typical manufacturing methods include, for example, the following methods (1) to (4).

(1) A method for producing an afluoride of an aromatic dihydroquine compound, an anhydride of an aromatic hydroxycarboxylic acid, and a deacetic acid condensation reaction from an aromatic dicarboxylic acid such as 4,4'-diphenyldicarboxylic acid.

(2) A method for producing an aromatic dihydroxy compound from an aromatic hydroxycarboxylic acid, an aromatic dicarboxylic acid such as 4,4'-diphenyldicarboxylic acid, and acetic anhydride by deacetic acid polycondensation reaction.

(3) A method for producing by dephenolization polypolymerization and condensation from an aromatic dihydroxy compound and a diphenyl ester of an aromatic dicarboxylic acid such as 4.4'->phenylenecarboxylic acid and a phenyl ester of an aromatic hydroxycarboxylic acid.

(4) W aromatic hydroxycarboxylic acid and H4.4'
- A method in which an aromatic dicarboxylic acid such as diphenyl dicarboxylic acid is reacted with a desired amount of diphenyl carbonate to form a phenyl ester with a carboxyl group, and then an aromatic dihydroxy compound is added and a phenol-decondensation polycondensation reaction is performed.

Typical catalysts used in this polycondensation reaction are Kintaka compounds such as Tetrabutyl titanate, lead acetate, antimony trichloride, magnesium, sodium acetate, potassium 61, and trisodium phosphate. It is particularly effective in dephenolization polycondensation.

Further, the aromatic polyester that can be preferably used in the present invention forms an anisotropic melt phase, but is heated at a shear rate of 1,000 degrees Celsius higher than the temperature at which it starts to show anisotropy (liquid crystal initiation temperature).
The melt viscosity measured under the condition of (1/sec) is lO~15
,000° voids can be preferably used.

It is preferable that the aromatic polyester used in the present invention does not generate any distillate due to polycondensation during melt molding processing, and therefore it is preferable that the condensation reaction does not proceed further upon heating.

As a method for preventing the further condensation reaction from proceeding due to sword heat after a certain degree of incorporation is reached, there is a method in which the terminal group of the polymer is made into one of the ester-forming functional groups. That is, by adding a dicarboxylic acid component or its derivative in slight excess to the dihydroxy compound or its derivative referred to in the present invention, it is possible to stop the chain growth of the polymer due to heating after reaching a certain degree of solubility.

Furthermore, after reaching a certain degree of conversion, it is possible to eliminate the hydroxyl group or its derivative from the molecular chain end by adding a monofunctional compound such as benzoic acid into the electrolyte system, and the resulting DIII heat can be removed. It is possible to suppress the chain growth caused by 4C.

Among the olefin-based polymers that can be used in the present invention, α-olefins include ethylene, propylene, butene-1, etc. , ethylene is preferably used. In addition, the glycidiol ester of an α,β-unsaturated acid has the general formula (wherein R is a hydrogen atom or a lower alkyl group).
Specifically, glycidyl acrylate, glycidyl methacrylate, glycidyl ethacrylate, etc. are used, and glycidyl methacrylate is preferably used.

The copolymerization ratio of glycidyl esters of α,β-unsaturated acids is 1
A range of 50 mol % is suitable. Furthermore, unsaturated monomers that can be co-merged with the above copolymer at 40 mol% or less, such as vinyl ethers, vinyl esters such as vinyl V-acid and propionic vinyl, methyl, ethyl, propyl, etc. Acrylic Hz, methacrylic acid noesters, acrylonitrile, styrene, etc. may be copolymerized.

On the other hand, in the present invention, as an olefin polymer, a copolymer consisting of ethylene and an α-olefin having a3 or more carbon atoms or ethylene, an α-olefin having a carbon number of 3 or more, and a non-conjugated diene (hereinafter referred to as both? collectively referred to as an unmodified ethylene-based 0.01- to mli for the co-electric combination
% of an unsaturated carboxylic acid or a derivative thereof can be used.

α- having 3 or more carbon atoms in unmodified ethylene copolymer
Olefins include propylene, butene-1 pentene-1,
3-methylpe/tene-11octacene-1, etc.
Propylene and butene-■ can be preferably used. In addition, non-conjugated diene is 5-methylidene-2-norbornene, 5-ethylidene-2-norhonene, 5-vinyl-
2-norbornene, 5-propenyl-2-norbornene, 5-isopropenyl-2-norbornene, 5-crotyl-2-norbornene, 5-(2-methyl-2-butenyl)-2-norbornene, 5-. (2-ethyl-2-butenyl)-2-norbornene, 5-methacrylnor M
-Nene, norbornene compounds such as 5-methyl-5-vinylnorbornene, dicyclopentadiene, methyltetrahydroindene, 4.7゜8.9-tetrahydroindene, l,5-cyclooctadiene, l,4- These include xadiene, isoprene, 6-methyl-1,5-hebutadiene, 11-ethyl-1,11-1lysocacyene, and preferably 5-methylidene-2-norbornene, 5-
Etheritene-2-norbornene, synchlopentadiene, 1,4-hexadiene, etc. can be used.

In a modified ethylene-based symbiotic combination consisting of ethylene and an α-olefin with a carbon number of 3 or more, the coelectrochemical combination of ethylene/and an α-olefin with a carbon number of 3 or more is 40/60 to 9'J.
/1 (molar ratio), preferably 70/30 to 9515
(molar ratio).

The amount of copolymerization of α-olefin having 3 or more carbon atoms in the unmodified ethylene-based co-combinant consisting of ethylene, α-olefin having 3 or more carbon atoms, and non-conjugated diene is 5 to 80 mol%.
, preferably 20 to 60 mol%, and the amount of copolymerized non-conjugated diene is 0.1 to 20 mol%, preferably 0.5 to 1
It is O mol%.

Specific examples of unmodified ethylene copolymers include ethylene/
Propylene copolymer N Preferable examples include ethylene/butene-1 copolymer, ethylene/propylene/dicyclopentadiene copolymer, and ethylene/propylene 15-ethelide/-2-norbornene copolymer. Ethylene/propylene copolymers and ethylene/butene-1 coelectropolymers that do not contain any of these have good heat resistance and can be used more preferably.

The unsaturated carboxylic acid for obtaining a modified ethylene copolymer by grafting the unmodified ethylene copolymer is preferably acrylic acid, methacrylic acid, ethacrylic acid, crotonic acid, maleic acid, fumaric acid, or itacone. J1
These include citraconic acid and butenedicarboxylic acid. Examples of derivatives thereof include alkyl esters, glycidyl esters, acid anhydrides, and imides. Among these, glycidyl esters, acid anhydrides, and imides are preferred.

Preferred specific examples of unsaturated carboxylic acids or derivatives thereof include maleic acid, heptamalic acid, glycidyl acrylate, glycidyl methacrylate, glycine ethacrylate,
Itaconic acid diglycidyl ester, citraconic acid diglycidyl ester, butene dicarboxylic acid diglycidyl ester, buty/dicarboxylic acid monoglycidyl ester, butene dicarboxylic acid monoglycidyl ester, maleic anhydride, itaconic anhydride, citraconic anhydride, maleic acid imide, These include itaconic acid imide, ntraconic acid imide, etc., and particularly glycidyl methacrylate, maleic anhydride, itaconic anhydride, and maleic acid imide can be preferably used. Two or more of these unsaturated epoxy monomers may be used in combination.

The graft reaction amount of unsaturated carboxylic acid or its derivative is 0.01 to 10% by weight, preferably 0.05 to 5% by weight.
It is necessary that A lifting platform with a graft reaction amount of unsaturated carboxylic acid or its derivative less than 0.01i% has a small effect on improving mechanical properties, especially surface impact resistance101
If the amount is less than 1%, the heat resistance of the aromatic polyester may be impaired, which is not preferable in any case. The term "graft reaction" as used herein means that an unsaturated carboxylic acid or a derivative thereof is chemically bonded to an unmodified ethylene copolymer.

The modified ethylene co-electropolymer is produced by adding an unsaturated carboxylic acid or a derivative thereof and an organic peroxide in an amount of 0.001 to 0.1% based on the unmodified ethylene copolymer to 150 to 150% of the unmodified ethylene copolymer. It can be easily produced by melt-kneading at 300°C. Devices for melt mixing include screw extruder 41 and Banbury mixer.
etc. can be used.

Specifically, organic peroxides that can be preferably used in this graft reaction include tert-butylcumyl peroxide, di-tert-butyl rubber oxide, dicumyl peroxide, and 2,5-dimethyl-2,5-di(tert-butyl cumyl peroxide).
t-butylperoxy)hexane, 2,5-dimethyl-
2,5-di(tert-butylperoxy)hexyne-
3, α, α'-di(tert-butylperoxy)diisopropylbenzene, and the like.

Note that two or more of the above olefin polymers may be used in combination with the aromatic polyester forming the anisotropic melt phase.

The blending amount of the above copolymer is 0.1 to 60 parts by weight, particularly 0.5 to 20 parts by weight per 100 parts by weight of aromatic polyester]
Part I is preferred. 0.1! The effect of the present invention is small in the case of the JF part, and if it exceeds 60 parts by weight, the advantages of aromatic polyester that forms an anisotropic melt phase such as high elastic modulus, excellent molding fluidity, and heat resistance are lost. Either case is not preferable.

The composition of the present invention exhibits good interlayer melt adhesion when subjected to multilayer composite injection molding, but the two layers forming the adhesive surface may be of the same type 4 or of different types. .

Furthermore, it has good interlayer adhesive strength with other liquid crystal polymers and thermoplastic resins.

Other thermoplastic polymers that can be used in combination with the composition of the present invention in multilayer composite injection molding include, for example, polyethylene terephthalate, polybutylene terephthalate, non-grade polyarylate, polyester polycarbonate, polycarbonate,
Examples include polysulfone, polyethersulfone, polyetherketone, polyetheretherketone, polyetherimide, polyphenylene sulfide, nylon 6, nylon 4,6, nylon 6.6, polyethylene, polypropylene, polystyrene/ABS, etc. The coefficient of linear expansion in the flow direction of the nermotropic polymer is IQ
It is preferred that the -'m coefficient be less than 5 x 10-'ix/z/°C.

Do we need two or more injection units to mold these thermoplastic polymers with liquid crystal polyester? An injection molding machine with a sand-inch injection molding machine (e.g.
(5), 54 ('71)), a two-color injection molding machine (or multi-material injection molding machine) 8, and a mixed-color injection molding machine.

In addition, glass may be added to the aromatic polyester composition of the present invention to the extent that the object of the present invention is not impaired. A jtl
, carbon fibers, reinforcing agents such as asbestos, fillers, nucleating agents, pigments, anti-sodification agents, stabilizers, plasticizers, lubricants, molding agents, flame retardants and other additives, and thermoplastic resins. Desired characteristics can be imparted by attaching the material.

The method for producing the composition of the present invention is preferably, but not limited to, a method in which aromatic polyester, olefin polymer, and other additives as required are melt-kneaded using an extruder.

The aromatic polyester composition obtained according to the present invention can be easily molded by methods such as injection molding and extrusion molding, and the molded products obtained exhibit excellent performance.

Kusho example> The present invention will be explained in further detail below using practical examples.

Incense Example 1 324 parts by weight of p-acetoxybenzoic acid, 137ffi★ parts of chlorohydroquinone diacetate, 162 parts by weight of phenylhydroquinone diacetate, and 4.4'-
300 ni parts of diphenyl dicarbonate was charged into a reaction vessel equipped with a stirring blade and a distillation tube and subjected to descaling. 4,4
'-Diphenyldicarboxylic acid is 3 for Chemistry 1,
Did you overfill by 5%? This will happen.

First, under a nitrogen gas atmosphere at 250 to 330°C without stirring.
After reacting for 5 hours, at 330℃ [stir? Start and start 1
．． The reaction was allowed to proceed for 25 hours. After that, the temperature was raised to 350℃, and the system was gradually pressurized, and the reaction was continued for an additional 1.0 hours in the 5-layer IP to complete the polycondensation, and almost the theoretical amount of vinegar was obtained. After distillation, Resin A having the following theoretical structural formula was obtained.

1 / m / n = 6 / 2 / 2 Also, this polyester was placed on the sample stage of a polarizing microscope and the temperature was raised to confirm the optical anisotropy.The result was 261'C, indicating good optical anisotropy. . Logarithmic viscosity of this IJ ester (pentafluorophenol solution 0.197 dl, 60
°C) is 3.20 and the shear rate at 320 °C is 100
The melt viscosity at 0 liters was 1,700 voids.

Reference Example 2 360 parts by weight of p-acetoxybenzene W a , 1 part by weight of hydroquinone diacetate, 167 parts by weight of t-butylhydroquinone diacetate and 333 parts by weight of 4,4'-diphenyldicarboxylic acid were mixed into a mixture equipped with a stirring blade and a distillation tube. The mixture was charged into a reaction vessel containing 100 ml of water and subjected to acetic acid depolymerization. 4.4'
- Diphenyl dicarboxylic acid has a chemical reaction rate of 3.0
This means that you have overfilled it by %. First, under nitrogen gas atmosphere 2
After reacting at 50 to 330°C for 1.5 hours with -A stirring,
Stirring was started at 330°C and the reaction was continued for an additional 15 hours.

After that, the temperature was raised stepwise to 350°C and 360°C, and then the pressure inside the system was gradually reduced to 0.5 tzHy for 1.
When the reaction was carried out for 25 hours to complete the polycondensation, almost the theoretical amount of acetic acid was distilled out, and a resin B having the following theoretical structural formula was obtained.

1 layer m/n = 6/2/2 In addition, when this polyester was heated on the sample stage of a polarizing microscope and the optical anisotropy was confirmed, the temperature was 260°C, indicating good optical anisotropy. Indicated. The logarithmic viscosity of this polyester was 2.9 g as a result of measurement under the same conditions as Reference Example I, and the shear rate at 320°C was 1000 (1/TJ).
The melt viscosity was 4,7θO voids.

Reference Example 3 (Production of modified ethylene polymer) Ethylene/butene-1 copolymer (copolymerization amount of butene-1 10 mol%)
Maleic anhydride double deficient parts 3 and 2 per 100 M parts
, 0.2 parts by weight of 5-dimethyl-2,5-di(tert-butylperoxy)hexane in a Henschel mixer through which nitrogen was passed, and stirred for 6 minutes to form a homogeneous mixture. This mixture was extruded using a 40 ffφ extruder with a L/D of 28 and equipped with a dalmage-type screw at a screw rotation speed of 8 Orpm and an in-linder temperature of 200°C to produce a modified ethylene copolymer (penta) (a) I got it.

After pulverizing the pellets, acetone was added and unreacted maleic anhydride was extracted using a Soxhlet extractor for 20 hours. After drying, the pellets were dissolved in p-xylene, and the ultraviolet absorption spectrum was measured to determine the amount of maleic anhydride grafted. As a result, it was found that 1.8% by weight of maleic anhydride had undergone the graft reaction.

Reference Examples 4 to 6 In the same manner as in Example 1, maleic anhydride or methacrylic
A glycidyl graft reaction was performed to obtain modified ethylene copolymers (b to d).

The results are shown in Table 1.

Table 1 Reference Example 3 for 100 parts by weight of resin A obtained in Reference Example 1
A portion of the modified ethylene copolymer alOm obtained in step 1 was triblended, melt mixed by single screw extrusion set at 320° C., and then pelletized. The aromatic polyester composition pellets thus obtained were subjected to a rawhide Nestal injection molding machine Promat 40/25 (manufactured by Rawhide Heavy Industries Co., Ltd.) under the conditions of a cylinder temperature of 320°C and a mold temperature of 30°C. A disk with a thickness of 2ff was molded. Dupont type falling ball impact test (ball radius 6n, load =
250 y) was performed. The results are shown in Table 2.

In addition, this polymer has a maximum mold clamping force of 25 tons and a maximum injection amount of 20 tons.
．． 4 cc, maximum injection pressure 1900 kq flcd rawhide heavy machinery industry (dental rawhide - using Nestal two-color injection molding machine, cylinder temperature 280-320℃, nozzle part! 3 x 8 x 70 fl at 320℃) After injection molding the inner layer 1, the mold was reversed and both sides of the inner layer were sandwich-molded with the outer layer 2 of 2.5 x 8 x 60 m+ of the same polymer to obtain a composite injection molded product consisting of three layers with a thickness of 8 ff and having the cross section shown in Figure 1. Ta.

゛ This composite injection molded product consisting of three layers was divided into two equal parts in the length direction, and the shear adhesive strength between the layers was measured using Tenzolon UTM Type I manufactured by Toyo Baldwin Co., Ltd. using the method shown in Figure 2. It was found to have a high adhesive strength of 18.3 kq/d.

Actual Examples 2 to 4 To 100 parts by weight of the resin A obtained in Reference Example 1, all of the modified ethylene copolymer b-dlO obtained in Reference Examples 4 to 6 as an olefin polymer was triblended, and 300 parts by weight of the resin A obtained in Reference Example 1 was triblended.
The mixture was melt-mixed using a single screw extruder set at ℃ and then pelletized.

The obtained pellets were molded under the same conditions as in Example 1, and a falling ball lambda test was performed. The results are shown in Table 2t.

Further, this pellet was composite-molded in the same manner as in Example 1 to obtain a composite injection-molded product consisting of three layers. Furthermore, Example 1
Between the layers in a similar way! ! g Breaking adhesive strength was measured. The results are shown in Table 2.

Zuike @ 5 2 thoughts and 1 yllll tree A A uniaxial tri-blend of 1034 parts of ethylene-glycidyl methacrylate (96/4 mol) copolymer to 100 parts of electric current and set at 320°C. The mixture was melt-mixed using a screw extruder and then pelletized. The obtained pellets were molded under the same conditions as in the actual test, and a falling ball impact test was conducted. The results are shown in Table 2.

Further, this pellet was composite-molded in the same manner as in Example 1 to obtain a composite injection-molded product consisting of three layers. Furthermore, the shear adhesive strength between the eyebrows was measured in the same manner as in Example 1. The results are shown in Table 2e.

Example 6.7 For 100 pages of resin B obtained in Reference Example 2, as the olefin polymer, 1 part of modified ethylene copolymer a obtained in Reference A3 or 1 part of ethylene/-methacrylic acid glycol/ 10jfi parts of ZIL (96/4 mol) copolymer were dissolved in a tri-blend extrusion set at 320° C., mixed with a, and then pelletized. The obtained pellets were subjected to a rawhide Nestal injection molding machine (Promano) 40/25 (manufactured by Rawhide Heavy Machinery Industry @) at a cylinder temperature of 330°C and a mold temperature of 30°C.
A disk with a thickness of 2M was molded under conditions of .degree. C., and the same test as in Example 1 was conducted. The results are shown in Table 2.

Further, this pellet was composite-molded in the same manner as in X-crown Example 1 to obtain a composite injection-molded product consisting of 3jtJ. Furthermore, the shear adhesive strength between the layers was measured in the same manner as in Example 1. The results are shown in Table 2.

Comparative Examples 1 and 2 The resin-filled moldings and B obtained in the reference examples were individually molded and subjected to the same falling ball test as in the actual examples. Further, a three-layer composite injection molded product consisting of each A1g alone was molded, and the shear adhesive strength of the living room was measured in the same manner as in Practical Example 1. The results are shown in Table 2.

Table 2 Effects of the present invention> The aromatic polyester composition of the present invention provides an injection molded article having excellent surface impact resistance, and the molded article obtained by multilayer composite injection molding of the composition of the present invention has a It was found that the adhesion was excellent.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a multilayer composite molded product, and FIG. 2 is a schematic diagram of an apparatus for measuring glabella shear adhesive strength of a multilayer composite molded product. ■...Inner layer, 2...Outer layer, 3...Crosshead,
4...sample, 5...aluminum plate, 0...load cell. Patent applicant Director of Institute of Industrial Technology

Claims (2)

[Claims] (1) 0.1 parts by weight of an olefin polymer per 100 parts by weight of an aromatic polyester that is composed of structural units selected from the following structural formulas (I) to (III) and capable of forming an anisotropic melt phase.
-60 parts by weight of an aromatic polyester composition. ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・(I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・(II) ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・・(III) (However, X in the formula is ▲a mathematical formula, chemical formula, table, etc.▼
, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼, ▲ Mathematical formulas, chemical formulas,
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, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼, ▲ Mathematical formulas, chemical formulas,
There are tables, etc.▼ and ▲There are mathematical formulas, chemical formulas, tables, etc.▼ Indicates one or more groups selected from ▲There are mathematical formulas, chemical formulas, tables, etc.▼, ▲Mathematical formulas, chemical formulas,
There are tables, etc. ▼, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼, ▲ Mathematical formulas, chemical formulas,
There are tables, etc. ▼, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼
Indicates one or more groups selected from , ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ and ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼. Z is selected from ▲There are mathematical formulas, chemical formulas, tables, etc.▼, ▲There are mathematical formulas, chemical formulas, tables, etc.▼, ▲There are mathematical formulas, chemical formulas, tables, etc.▼, ▲There are mathematical formulas, chemical formulas, tables, etc.▼ Indicates one or more groups. ) (2) Olefin polymers are α-olefins and α,β
- The aromatic polyester composition according to claim (1), which is a copolymer consisting of a glycidyl ester of an unsaturated acid. (3) The olefin polymer contains 0.01 to 10% by weight of a copolymer consisting of ethylene and an α-olefin having 3 or more carbon atoms or ethylene, an α-olefin having 3 or more carbon atoms, and a non-conjugated diene. The aromatic polyester composition according to claim (1), which is a modified ethylene polymer obtained by grafting a saturated carboxylic acid or a derivative thereof.