JP3400102B2 - Wholly aromatic polyester resin composition coated with montanate - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermotropic liquid crystal polymer particle mixture which does not contaminate a dryer during heating and drying and can stably carry out plasticization. The present invention relates to a molding method using the same. In order to stabilize the plasticization of a thermotropic liquid crystal polymer, Japanese Patent Application Laid-Open No. 5-125258 discloses a method in which a thermotropic liquid crystal polyester particle is dried for 30 minutes by a heating dryer at 120 ° C. It has been proposed to add a mixture of stearic acid and calcium stearate, and then supply the mixture to an injection molding machine for molding. Calcium stearate is said to exhibit a more effective plasticizing and stabilizing effect when combined with stearic acid than when used alone. Since the thermotropic liquid crystal polymer has a high melting point and is therefore susceptible to moisture during molding due to the high molding temperature, drying must be carried out for a long time, especially when using a stored thermotropic liquid crystal polyester, usually several hours. Need to be dried. However, the mixture of stearic acid and calcium stearate contains a large amount of volatile components when heated and dried for a long time, for example, 4 hours or more, due to the contained stearic acid, and there is a concern that the heated dryer may be contaminated. In addition, there is a concern that the stabilizing effect is reduced due to the volatilization of stearic acid. Further, since calcium stearate has an excessively high melting point, the powder does not melt at the heating and drying temperature even when mixed with thermotropic liquid crystal polymer particles and dried by heating. Therefore, after drying, it appears that the stearic acid coexisting is adhered in a film or a layer due to melting, but when observed finely, the powder of calcium stearate is substantially in a state of simply adhering to the resin particles. I understand. Therefore, the plasticizing stabilizing effect is not always as great as expected. [0003] In view of the circumstances as described above [0008] The present invention is long, without contaminating the dryer <br/> when heat drying for example 4 hours or more, An object of the present invention is to provide a thermotropic liquid crystal polymer particle having an excellent plasticizing stability effect and a molding method using the same. [0004] A first aspect of the present invention is a wholly aromatic compound.
Group polyester 100 parts by weight and inorganic filler 10 to 90 weight
100 parts by weight of resin pellets obtained by melt-kneading
4 hours at 150 ° C and melting point below 150 ° C
High-grade fat with a volatile content of 4% by weight or less when heated
Mixture of metal salt of fatty acid or metal salt of higher fatty acid with higher fatty acid
Aromatic polymer coated with 0.001 to 5 parts by weight of the compound
An object of the present invention is to provide an ester resin composition . A second aspect of the present invention is that 100 parts by weight of wholly aromatic polyester and inorganic filler
10 to 90 parts by weight of a resin pellet obtained by melt-kneading
100 parts by weight of the surface is melted at 150 ° C.
Volatile content when heated at 0 ° C for 4 hours is 4% by weight or less
Is higher fatty acid metal salt or higher fatty acid metal salt and higher
0.001 to 5 parts by weight of mixture with fatty acid
The present invention provides a wholly aromatic polyester resin composition coated in a shape . Further, a third aspect of the present invention is a wholly aromatic polycarbonate.
100 parts by weight of ester and 10 to 90 parts by weight of inorganic filler
Table of 100 parts by weight of resin pellets obtained by melt-kneading
Surface, melting point 150 ℃ or less containing calcium montanate,
In addition, the volatile matter when heated at 150 ° C. for 4 hours is 4
Higher fatty acid metal salt or higher fatty acid gold in an amount of not more than
In a mixture of 0.001 to 5 parts by weight of a mixture of
It is intended to provide a coated wholly aromatic polyester resin composition . The fourth aspect of the present invention is a wholly aromatic polyester 1
00 parts by weight and 10 to 90 parts by weight of inorganic filler are melt-kneaded
Surface of the resin pellet 100 obtained by
A melting point of 150 ° C. or less containing calcium phosphate, and 150
The volatile matter when heated at 4 ℃ for 4 hours is less than 4% by weight
A higher fatty acid metal salt or a higher fatty acid metal salt and a higher fat
0.001 to 5 parts by weight of mixture with fatty acid
The present invention provides a wholly aromatic polyester resin composition coated on a substrate . Hereinafter, the present invention will be described in more detail. The higher fatty acid metal salt or a mixture of the higher fatty acid metal salt and the higher fatty acid used in the present invention has a volatile content of 4% by weight or less, preferably 3% by weight when heated at 150 ° C. for 4 hours.
It is as follows. In the measurement of volatile matter, the higher fatty acid metal salt or the mixture of higher fatty acid metal salt and higher fatty acid 10
Grams are placed on a plate and heated in an air oven under the above conditions to determine the change in weight before and after. Volatile content is 4% by weight
If it is larger, the plasticizing stabilizing effect is reduced, and at the same time, the dryer may be contaminated during drying before molding, which is not preferable. The metal constituting the higher fatty acid metal salt is as follows:
Preference is given to metals of groups IA, IB or IIA, IIB in the periodic table, especially alkaline earth metals, specifically calcium. The higher fatty acid metal salt may be used in combination with a higher fatty acid. The higher fatty acid may be an acid constituting the metal salt of the higher fatty acid or another higher fatty acid. The blending amount of the higher fatty acid is 1 or less with respect to 1 of the higher fatty acid metal salt by weight. When a mixture of higher fatty acids is used, a mixture of a higher fatty acid metal salt and a higher fatty acid may be used as a mixture.
It is necessary that the volatile matter when heated at 4 ° C. for 4 hours is 4% by weight or less. Further, the melting points of the higher fatty acid metal salt and the higher fatty acid are preferably equal to or lower than the heating and drying temperature. If the melting point is lower than the heating and drying temperature, it melts during heating and drying to form a film and adheres effectively to the surface of the resin particles. This further increases the plasticizing stabilizing effect. As the higher fatty acid metal salt, calcium montanate is particularly preferred. Calcium montanate is produced from inorganic wax containing a large amount of esters and free acids obtained by distilling or solvent-extracting natural asphalt lignite. Although calcium montanate has a relatively low melting point of 123 ° C. as compared with calcium stearate, it has less volatile components when heated at 150 ° C. for 4 hours, so that a film or layer made of calcium montanate is effectively used. Is preferable since it is formed and adheres to the resin. As the higher fatty acid to be added to calcium montanate, montanic acid is preferable for the same reason. Since the volatile matter and the melting point of calcium montanate and montanic acid can be changed depending on the degree of purification, one that satisfies the above conditions is appropriately selected. [0008] The thermotropic liquid crystal polymer in the present invention is a polymer which exhibits optical anisotropy when melted and has thermoplasticity. As described above, a polymer that exhibits optical anisotropy at the time of melting exhibits a property that the polymer molecular chains take a regular parallel arrangement in a molten state. The properties of the optically anisotropic molten phase can be confirmed by a usual polarization inspection method using a crossed polarizer. As the liquid crystal polymer, for example, liquid crystalline polyester, liquid crystalline polycarbonate,
Liquid crystalline polyesterimides and the like, specifically, (whole) aromatic polyesters, polyesteramides, polyamideimides, polyestercarbonates, polyazomethines and the like can be mentioned. A thermotropic liquid crystal polymer generally has an elongated and flat molecular structure, and has high rigidity along a long chain of the molecule. In the thermotropic liquid crystal polymer used in the present invention, a part of one polymer chain is composed of a polymer segment forming an anisotropic molten phase, and the remaining portion is a polymer segment not forming an anisotropic molten phase. Also included are polymers composed of Further, a composite of a plurality of thermotropic liquid crystal polymers is also included. Representative examples of the monomers constituting the thermotropic liquid crystal polymer include (A) at least one kind of aromatic dicarboxylic acid, (B) at least one kind of aromatic hydroxycarboxylic acid type compound, and (C) aromatic diol type compound. (D) (D ₁ ) aromatic dithiol, (D ₂ ) aromatic thiophenol, (D ₃ ) at least one aromatic thiol carboxylic acid compound, (E) aromatic hydroxylamine, aromatic And aromatic compounds such as at least one of aromatic diamine compounds. These may be used alone, but many are (A) and (C);
(A) and (D); (A), (B) and (C); (A),
(B) and (E); or a combination such as (A), (B) and (C) and (E). The aromatic dicarboxylic acid compound (A) includes terephthalic acid, 4,4'-diphenyldicarboxylic acid, 4,4'-triphenyldicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and 1,4- Naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, diphenyl ether-4,4'-dicarboxylic acid, diphenoxyethane-
4,4'-dicarboxylic acid, diphenoxybutane-4,4'-
Dicarboxylic acid, diphenylethane-4,4'-dicarboxylic acid, isophthalic acid, diphenylether-3,3'-dicarboxylic acid, diphenoxyethane-3,3'-dicarboxylic acid, diphenylethane-3,3'-dicarboxylic acid, 1,6
Aromatic dicarboxylic acids such as naphthalenedicarboxylic acid, or chloroterephthalic acid, dichloroterephthalic acid, bromoterephthalic acid, methylterephthalic acid, dimethylterephthalic acid, ethylterephthalic acid, methoxyterephthalic acid,
Alkyl, alkoxy or halogen substituents of the above aromatic dicarboxylic acids represented by ethoxy terephthalic acid and the like. (B) The aromatic hydroxycarboxylic acid compounds include aromatic hydroxycarboxylic acids such as 4-hydroxybenzoic acid, 3-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid and 6-hydroxy-1-naphthoic acid. Carboxylic acid, or 3-methyl-4-hydroxybenzoic acid, 3,
5-dimethyl-4-hydroxybenzoic acid, 2,6-dimethyl-4-hydroxybenzoic acid, 3-methoxy-4-hydroxybenzoic acid, 3,5-dimethoxy-4-hydroxybenzoic acid, 6-hydroxy-5 Methyl-2-naphthoic acid, 6-hydroxy-5-methoxy-2-naphthoic acid, 2-chloro-4-hydroxybenzoic acid, 3-chloro-4-hydroxybenzoic acid, 2,3-dichloro-4-hydroxybenzoic acid Acid, 3,5-dichloro-4-hydroxybenzoic acid, 2,5-dichloro-4-hydroxybenzoic acid, 3-bromo-4-hydroxybenzoic acid, 6-hydroxy-5-chloro-2-naphthoic acid, 6 -Hydroxy-
7-chloro-2-naphthoic acid, 6-hydroxy-5,7
And alkyl-, alkoxy-, or halogen-substituted aromatic hydroxycarboxylic acids such as -dichloro-2-naphthoic acid. (C) As the aromatic diol, 4,4'-
Dihydroxydiphenyl, 3,3′-dihydroxydiphenyl, 4,4′-dihydroxytriphenyl, hydroquinone, resorcinol, 2,6-naphthalenediol,
4'-dihydroxydiphenyl ether, bis (4-hydroxyphenoxy) ethane, 3,3'-dihydroxydiphenyl ether, 1,6-naphthalenediol, 2,2-
Bis (4-hydroxyphenyl) propane, aromatic diol such as bis (4-hydroxyphenyl) methane, or chlorohydroquinone, methylhydroquinone, tert-
Butylhydroquinone, phenylhydroquinone, methoxyhydroquinone, phenoxyhydroquinone, 4-
Alkyl, alkoxy or halogen-substituted aromatic diols such as chlororesorcin and 4-methylresorcin. Examples of (D ₁ ) aromatic dithiol include benzene-1,4-dithiol, benzene-1,3-dithiol, 2,6-naphthalene-dithiol, and 2,7-naphthalene-dithiol. (D ₂ ) Examples of the aromatic thiophenol include 4-mercaptophenol, 3-mercaptophenol, and 6-mercaptophenol. (D ₃ ) Examples of the aromatic thiolcarboxylic acid include 4-mercaptobenzoic acid, 3-mercaptobenzoic acid, 6-mercapto-2-naphthoic acid, and 7-mercapto-2-naphthoic acid. (E) As aromatic hydroxylamine and aromatic diamine compounds, 4-aminophenol, N
-Methyl-4-aminophenol, 1,4-phenylenediamine, N-methyl-1,4-phenylenediamine,
N, N'-dimethyl-1,4-phenylenediamine, 3-
Aminophenol, 3-methyl-4-aminopheno
2-chloro-4-aminophenol, 4-amino-
1-naphthol, 4-amino-4′-hydroxydiphenyl, 4-amino-4′-hydroxydiphenyl ether, 4-amino-4′-hydroxydiphenylmethane,
4-amino-4'-hydroxydiphenyl sulfide,
4,4'-diaminophenyl sulfide (thiodianiline), 4,4'-diaminodiphenyl sulfone, 2,5-
Diaminotoluene, 4,4'-ethylenedianiline, 4,
4'-diaminodiphenoxyethane, 4,4'-diaminodiphenylmethane (methylenedianiline), 4,4'-diaminodiphenylether (oxydianiline) and the like. The thermotropic liquid crystal polymer used in the present invention can be produced from the above monomers by various ester forming methods such as a melt acidilysis method and a slurry polymerization method. Among the thermotropic liquid crystal polymers obtained from these monomers, a wholly aromatic polyester which is a (co) polymer containing a monomer unit represented by the general formula 1 is preferable. ## STR1 ## A particularly preferred wholly aromatic polyester of the present invention is a polyester represented by the formula (2) having a repeating unit derived from three compounds of p-hydroxybenzoic acid, phthalic acid and biphenol, or p-hydroxybenzoic acid, phthalic acid and biphenol.
A polyester represented by Chemical Formula 3 having a repeating unit derived from two kinds of compounds, hydroxybenzoic acid and hydroxynaphthoic acid. Embedded image Embedded image The thermotropic liquid crystal polymer particles in the present invention mean those having any shape and dimensions that can be supplied to a molding machine. Usually, the material is supplied to a molding machine such as an extrusion molding machine or an injection molding machine in a granulated particle shape (pellet) having a fixed size. Particles granulated by a suitable granulator are preferred. Usually the particle size is 1-10m
The particles are in the range of m, but smaller powders can be used depending on the type of molding machine. The thermotropic liquid crystal polymer particles may be a thermotropic liquid crystal polymer alone, but preferably use an inorganic or organic filler. Usually, the amount of the inorganic or organic filler is 90 parts by weight or less, preferably 10 to 80 parts by weight, more preferably 20 to 60 parts by weight, per 100 parts by weight of the thermotropic liquid crystal polymer. The method for producing thermotropic liquid crystal polymer particles in which an inorganic or organic filler is blended is not particularly limited. However, a powdery or pelletized polymer and an inorganic or organic filler (often in a powdery form) are put into a usual extruder. And can be easily manufactured. Of the inorganic or organic fillers, inorganic fillers are particularly important, and are often used to improve the processability of the thermotropic liquid crystal polymer and the properties of molded articles. As the inorganic filler, conventionally known molybdenum disulfide, talc, mica, clay, sericite, calcium carbonate, calcium silicate, silica, alumina, aluminum hydroxide, calcium hydroxide, graphite, amorphous carbon, potassium titanate ,
Glass fibers, carbon fibers, various whiskers, and the like are included. In the present invention, various additives can be added to the polymer in addition to the inorganic or organic filler in order to improve the physical properties in practical use. It is preferred that the polymer particles obtained by previously blending the agent into the polymer are subjected to mixing. Examples of such additives include conventionally known stabilizers, antioxidants, ultraviolet absorbers, pigments, dyes, and modifiers. It is to be noted that, within the scope of the present invention, thermotropic liquid crystal polymer may contain other thermoplastic resins such as polyolefin, polyvinyl chloride, polyvinylidene chloride, polyamide resin, polyphenylene sulfide resin, polysulfone resin, etc. May use thermotropic liquid crystal polymer particles blended with an elastomer such as natural rubber or synthetic rubber. These resins are not essential components in the present invention, but the types and amounts thereof can be appropriately selected according to the purpose. The amount of the higher fatty acid metal salt or a mixture of the higher fatty acid metal salt and the higher fatty acid (hereinafter abbreviated as “higher fatty acid metal salt or the like”) used in the present invention is based on 100 parts by weight of thermotropic liquid crystal polymer particles. 0.001 to
5 parts by weight. If the amount is less than 0.001 part by weight, a sufficient effect cannot be obtained. When the amount exceeds 5 parts by weight, the mechanical strength of the obtained molded article decreases, and the hue of the molded article deteriorates when exposed to high temperatures. When a metal salt of a higher fatty acid and a higher fatty acid are used in combination, the metal salt of a higher fatty acid obtained as a partially neutralized product of the higher fatty acid is used as long as the ratio between the metal salt of the higher fatty acid and the higher fatty acid is appropriate. And higher fatty acids. The higher fatty acid metal salt, the mixture of the higher fatty acid metal salt and the higher fatty acid, and the mixture of the higher fatty acid metal salt and the higher fatty acid as a partially neutralized product of the higher fatty acid are all powdered products that are commercially available. It can be used as appropriate. Granules or nodules are suitably ground and mixed. The method for mixing the thermotropic liquid crystal polymer particle mixture in the present invention is not particularly limited, and the powdery higher fatty acid metal salt or the like and the thermotropic liquid crystal polymer particles are mixed using an arbitrary stirrer such as a tumbler mixer or a Henschel mixer. Can be performed in any manner.
The temperature conditions for mixing are not particularly limited, and may be such that frictional heat during mixing is used. Usually, it is sufficient to stir and mix at a temperature at which the higher fatty acid metal salt or the like does not melt. Since the thermotropic liquid crystal polymer has extremely high heat resistance, it does not substantially soften in the above mixing. The mixing time is not particularly limited, and may be any time long enough to form a uniform mixture of the polymer particles and the higher fatty acid metal salt. When the thermotropic liquid crystal polymer contains an excess amount of water due to storage or the like, it is necessary to perform drying to remove water before molding such as injection molding. The same applies to the pellet-shaped polymer, as well as the powdered thermotropic liquid-crystal polymer. When a filler is blended in the polymer particles, it is particularly necessary to dry the filler when the filler is hygroscopic. Therefore, before forming, thermotropic liquid crystal polymer particles to which the higher fatty acid metal salt or the like is attached are dried by heating in a temperature range of 110 to 150 ° C., and then supplied to a forming machine to be formed. If the drying temperature exceeds 150 ° C., the resin deteriorates, while if it is lower than 110 ° C., the drying is insufficient, and neither is preferable. The time required for drying must be long enough for the stored resin etc.
Therefore, the time is set to 4 hours or more. Usually, it is carried out for 4 to 10 hours. Whether or not drying is sufficient can be confirmed by inspecting the molded product for blister generation. After drying, it may be supplied to a molding machine immediately, or may be used after being stored in an appropriate storage tank for a certain period. Needless to say, the storage tank in this case is made to have a sealed structure or a means capable of preventing intrusion of moisture by means such as sealing with dry air or an inert gas such as nitrogen. The resin particles of the present invention are preferable because they do not contaminate the dryer even when the heating and drying are performed as described above. In the step of transporting the liquid crystal polymer particles to an extruder of a molding machine and plasticizing, there is a problem that the plasticization is difficult to stabilize. In order to solve this, the thermotropic liquid crystal polymer particle mixture is not a mere mixture of liquid crystal polymer particles and powders such as higher fatty acid metal salts,
It is desirable that the higher fatty acid metal salt or the like covers the surface of the polymer particles in a layer or film form. By adopting such a form, the higher fatty acid metal salt or the like can effectively exhibit a plasticizing stabilizing effect. In the present invention, as described above, the higher fatty acid metal salt or the like is melted during the heating and drying to coat the surface of the polymer particles in a layer or film. Since the above-mentioned problem at the time of molding the liquid crystal polymer is a phenomenon at the interface between the polymer and the barrel (cylinder) or screw surface, if the supplied polymer particles are coated with a higher fatty acid metal salt or the like. ,
When the surface of the polymer particles is melted, these metal salts act to improve the interfacial state and solve the problem. On the other hand, when a higher fatty acid metal salt or the like is blended inside the polymer particles, only the portion existing near the surface of the particles is effectively used, and in order to exhibit a sufficient effect, However, much higher amounts are required as a whole than when polymer particles are coated.
For this reason, problems such as a decrease in strength of the polymer and a decrease in heat resistance sometimes occur. In addition, higher fatty acid metal salts, etc.,
When melt-kneaded with a thermotropic liquid crystal polymer having a high melting point, thermal stability is not always good. Therefore, it is preferable that the polymer particles in which a filler, other additives, and the like are blended are coated with a higher fatty acid metal salt or the like before molding. As described above, other additives can be used together with the higher fatty acid metal salt and the like,
If they are mixed in an excessively large amount, the effects of the present invention due to higher fatty acid metal salts or the like may be reduced or diminished due to the coexistence of these. Therefore, it is preferable to suppress the coexistence amount of other additives to the minimum necessary. The thermotropic liquid crystal polymer particle mixture of the present invention is subjected to molding such as extrusion molding and injection molding by a conventionally known method. As the molding equipment and molding conditions, those known for thermotropic liquid crystal polymer can be adopted. In any of the molding methods, the effects of the present invention are best exhibited by using an extrusion molding machine, an injection molding machine, or the like that utilizes a plasticizing step using a screw.
An example of such an injection molding machine is a so-called in-line screw injection molding machine. Any molding machine may be used as long as it is a molding machine that utilizes a plasticizing step using a screw. For example, a granulating machine such as a pelletizer may be used. EXAMPLES The present invention will be described below in detail with reference to examples. <Examples 1 to 3> Terephthalic acid, 4-hydroxybenzoic acid and 4,4'- as thermotropic liquid crystal polymers
60% by weight of terpolymer (melting point 420 ° C. by DSC) composed of 1: 2: 1 by weight of dihydroxybiphenyl
And a mixture of pellets (particle diameter: 2 to 3 mm) previously prepared by mixing and kneading 40% by weight of ground glass fiber with calcium montanate powder in a ratio shown in Table 1 using a Henschel mixer to obtain a polymer particle mixture. I got Next, the mixture of the calcium montanate and the polymer particles obtained above is put into a shelf-type heating and drying machine adjusted to 120 ° C. for heating and drying, and the mixture is left under heating at 120 ° C. for 4 hours to be heated. Drying was performed. After the drying was completed, the inside of the dryer was visually observed, and no contamination with calcium montanate was observed at any point. Observation of the resulting dried particle mixture by visual observation shows that the mixed calcium montanate is slightly present in the form of a powder before blending, and most of the mixed calcium montanate is almost uniformly formed into a film or layer on the particle surface. Had adhered. The above-mentioned polymer particle mixture was supplied to a hopper of an injection molding machine equipped with a screw-type extruder, and injection-molded into a mold through a gate according to a conventional method. The above-mentioned injection molding was performed continuously 20 times, and the rate of change of the filling time into the cylinder of the injection molding machine was determined by the following equation. Table 1 shows the results. Filling time fluctuation rate (%) = (standard deviation of filling time / average filling time) × 100 Further, although the obtained molded article was exposed to a high temperature of 250 ° C. for 3 hours, no blister was observed. Comparative Example 1 A 1: 1 mixture (weight ratio) of stearic acid and calcium stearate was mixed with the thermotropic liquid crystal polymer used in the example in the same manner as in the example 1 to obtain a polymer particle mixture. . This was similarly placed in a shelf-type heating dryer and dried. Table 1 shows the blending amounts of calcium stearate and the like, the melting points, and the volatile components obtained by heating and drying at 150 ° C. for 4 hours. Injection molding was performed using the dried polymer particle mixture in the same manner as in the examples, and the rate of change in the filling time into the cylinder of the injection molding machine was determined. Table 1 shows the results. As can be seen from the table, since the 1: 1 mixture of stearic acid and calcium stearate has a large volatile content, after drying for 4 hours, the inside of the dryer was visually observed, and contamination with stearic acid was recognized on the inner wall. Was. Further, when observed closely, calcium stearate was attached in powder form. Furthermore, the variation rate of the filling time into the cylinder of the injection molding machine was high. Comparative Example 2 Calcium stearate was mixed with the thermotropic liquid crystal polymer used in the example in the same manner as in the example to obtain a polymer particle mixture. Table 1 shows the results of heating and drying in the same manner as described above. Observation after drying revealed that calcium stearate was attached in powder form, and that the rate of change in the filling time into the cylinder of the injection molding machine was high. Comparative Example 3 A montanic acid ester wax was mixed with the thermotropic liquid crystal polymer used in the example in the same manner as in the example to obtain a polymer particle mixture. Table 1 shows the results of drying by heating in the same manner as described above.
After drying, the inside of the dryer was visually observed, and contamination with ester wax was recognized on the inner wall of the dryer because of a large amount of volatile components. In addition, the fluctuation rate of the filling time into the cylinder of the injection molding machine was high. [Table 1] The thermotropic liquid crystal polymer particle mixture of the present invention has the following advantages: (1) little volatilization even after sufficient drying, so that the dryer is not contaminated; and (2) higher fatty acid metal Since the salt or the like covers the surface of the polymer particles almost uniformly in a layer or film, the plasticizing effect is excellent.

Claims (1)

(57) and Patent Claims 1. A resin Bae <br/>Re' DOO 100 parts by weight obtained by melt-kneading a wholly aromatic polyester to 100 parts by weight of an inorganic filler of 10 to 90 parts by weight , Calcium montanate (melting point 1
When heat treated at 50 ° C or lower and 150 ° C for 4 hours
Of less than 4% by weight)
The mixture is heated for 4 hours or more in the temperature range of 110 ° C to 150 ° C.
The calcined montanic acid obtained by heat drying
A wholly aromatic polyester resin composition whose surface is coated in the form of a layer or a film with a chromium.