KR20190062897A - High heat resistant polyarylate resin composition having enhanced flowability - Google Patents

Abstract

Disclosed is a high heat resistant polyarylate resin composition having enhanced flowing ability, which has excellent flowing ability while preventing the deterioration of heat resistance and mechanical properties by using a polycarbonate resin and a phosphoric acid ester compound for improving flowing ability and using a phosphorus-based thermal stabilizer in combination to prevent the deterioration of heat resistance. The present invention provides a polyarylate resin composition comprising, based on total 100 parts by weight of a resin comprising 50 to 90 parts by weight of polyarylate and 10 to 50 parts by weight of polycarbonate, 0.1 to 10 parts by weight of the phosphoric acid ester compound, and 0.1 to 10 parts by weight of the phosphorus-based thermal stabilizer.

Description

TECHNICAL FIELD The present invention relates to a high heat resistant polyarylate resin composition having enhanced flowability,

The present invention relates to a polyarylate resin composition, and more particularly, to a high heat resistant polyarylate resin composition having improved fluidity.

The polyarylate resin is excellent in impact resistance and mechanical properties and exhibits high transparency, and is therefore widely used as a housing for an electric or electronic product or an automobile part.

However, because of the high melt viscosity of the polyarylate resin, the moldability is poor due to the lack of fluidity. Accordingly, techniques have been developed to improve fluidity while minimizing deterioration of mechanical properties and heat resistance of polyarylate resins.

Japanese Patent Application Laid-Open No. 2011-074095 discloses a resin composition having improved fluidity including polyarylate, polycarbonate and cycloolefin resin. However, recently, sufficient fluidity required for the miniaturization trend of products has not been secured, There is not proposed a solution for solving the decrease in heat resistance.

Japanese Patent Application Laid-Open No. 2011-074163 discloses a resin composition having improved fluidity including polyarylate, polycarbonate and polyamide. However, recently, sufficient fluidity required for a trend toward downsizing of a product has not been secured, But it does not provide a solution to the problem.

DISCLOSURE OF THE INVENTION The present invention provides a highly heat resistant polyarylate resin composition having improved flowability and excellent fluidity while preventing deterioration of heat resistance and mechanical properties of a polyarylate resin.

In order to solve the above problems, the present invention provides a resin composition comprising 0.1 to 10 parts by weight of a phosphoric acid ester compound and 0.1 to 10 parts by weight of a phosphorus-containing thermal stabilizer, based on 100 parts by weight of a resin comprising 50 to 90 parts by weight of a polyarylate and 10 to 50 parts by weight of a polycarbonate Wherein the polyarylate resin composition is a polyarylate resin composition.

The polyarylate resin has a heat distortion temperature of 170 DEG C or higher measured at a load of 18.6 kgf according to ASTM D648.

Also, the polycarbonate has a weight average molecular weight of 10,000 to 200,000.

The phosphoric acid ester compound is at least one selected from the group consisting of 1,3 phenylene bis (diphenyl phosphate), bisphenol A bis (diphenyl phosphate) and resorcinol bis (dimethyl phenyl phosphate). Lt; / RTI >

Also, the phosphorus thermal stabilizer has a residual value of 90% by weight or more when measured by a thermal method in the following manner.

[Measurement method of thermal property]

The residue is measured using a thermogravimetric analyzer (TGA) when heat is applied at 800 ° C.

Also, the phosphorus thermal stabilizer may include at least two selected from the group consisting of pyrophosphate, pentaerythritol ester, and diphosphoric acid.

The polyarylate resin composition had a flow index (330 캜, 2.16 kgf) of 25 g / 10 min or more, a tensile strength (50 mm / min) of 700 kgf / cm ² or more, a flexural strength ) Of not less than 950 kgf / cm ² , a flexural strength elastic modulus (10 mm / min) of not less than 23,000 kgf / cm ² , and a heat distortion temperature (18.6 kgf) of not less than 140 ° C .

[How to measure]

The melt index (MI) of the specimen made of the polyarylate resin composition was measured for 10 minutes using a weight of 2.16 kg at a measurement temperature of 330 캜 according to ASTM D1238, and the tensile strength at 50 mm / min under ASTM D638 The strength was measured and the flexural strength and flexural strength modulus were measured under 10 mm / min according to ASTM D790 and the heat distortion temperature (HDT) was measured at 18.6 kgf according to ASTM D648.

According to the present invention, a polycarbonate resin and a phosphoric acid ester compound are added to improve fluidity, and phosphorus-based thermal stabilizers are used together to prevent deterioration in heat resistance, thereby improving fluidity with excellent fluidity while preventing degradation of heat resistance and mechanical properties. A heat resistant polyarylate resin composition can be provided.

Hereinafter, preferred embodiments of the present invention will be described in detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Throughout the specification, when an element is referred to as "including " an element, it means that it can include other elements, not excluding other elements, unless specifically stated otherwise.

The inventors of the present invention have conducted intensive studies to solve the problem that the heat resistance of the polyarylate resin is lowered when the polycarbonate and the phosphate ester are melt-kneaded to improve the fluidity of the conventional polyarylate. As a result, The present inventors have found that when a phosphorus thermal stabilizer containing a specific component together with an ester compound and having excellent thermal properties is contained, the balance of physical properties is significantly improved as compared with conventional polyarylate resins.

Accordingly, the present invention relates to a resin composition comprising 0.1 to 10 parts by weight of a phosphoric acid ester compound and 0.1 to 10 parts by weight of a phosphorus-based thermal stabilizer, based on 100 parts by weight of a resin comprising 50 to 90 parts by weight of a polyarylate and 10 to 50 parts by weight of a polycarbonate, Related resin compositions are disclosed.

Hereinafter, each component of the polyarylate resin composition according to the present invention will be described in more detail.

(A) Polyarylate

The polyarylate used in the present invention is an aromatic polyester resin composed of an aromatic dicarboxylic acid residue unit and a bisphenol residue unit, and considering heat resistance as a result of improvement in fluidity, it is preferable to use a heat of measurement at a load of 18.6 kgf according to ASTM D648 It is preferable that the deformation temperature is 170 deg.

The production of the polyarylate can be carried out by a production method of a polycarbonate described later, but not particularly limited, and known methods such as interfacial polymerization and melt polymerization can be used.

Examples of the precursor for introducing the aromatic dicarboxylic acid residue include terephthalic acid and isophthalic acid. In the present invention, a polyarylate resin composition obtained by mixing both of them is preferable in terms of melt processability and mechanical properties. The mixing ratio of terephthalic acid and isophthalic acid may be arbitrarily selected, but it is preferably in the range of 90/10 to 10/90, more preferably 70/30 to 30/70 in terms of the mole fraction. When the molar fraction of terephthalic acid is out of the above range (10 to 90), it may be difficult to obtain a sufficient degree of polymerization in the polymerization by the interfacial polymerization method.

Examples of the precursor for introducing the bisphenol moiety are 2,2-bis (4-hydroxyphenyl) propane, 2.2-bis (4-hydroxy-3,5-dimethylphenyl) propane, (4-hydroxy-3,5-dibromophenyl) propane, 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxydiphenyl sulfone Dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxybenzophenone (diphenyl ketone), 4,4'-dihydroxydiphenyl methane, 1 , 1-bis (4-hydroxyphenyl) cyclohexane, and the like. These compounds may be used alone or in combination of two or more.

In the present invention, the content of the polyarylate is 50 to 90% by weight, preferably 80 to 90% by weight. When the content of the polyarylate is less than 50% by weight, the heat resistance may be drastically deteriorated. When the content of the polyarylate exceeds 90% by weight, the effect of improving the fluidity may be insignificant.

(B) Polycarbonate

The polycarbonate used in the present invention is used together with a phosphoric acid ester compound to improve the fluidity of the polyarylate. The mixing ratio (weight ratio) of the polyarylate and the polycarbonate in the present invention is 90/10 to 50/50 , Preferably 90/10 to 80/20, more preferably 90/10.

The polycarbonate may be prepared by a conventional method, for example, by reacting dihydroxy phenol with phosgene in the presence of a molecular weight modifier and a catalyst, or by reacting dihydroxy Can be prepared by using an ester interchange reaction of a precursor obtained by dihydroxy phenol and diphenyl carbonate.

Further, the polycarbonate is a polycarbonate ester composed of a bisphenol moiety and a carbonate moiety, and has a bisphenol moiety similar to that of the polyarylate resin. Therefore, the polycarbonate has good compatibility with the polyarylate resin, Can be improved.

Examples of bisphenols constituting the bisphenol moiety are 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (3,5-dibromo-4- Bis (3,5-dimethyl-4-hydroxyphenyl) propane, 1,1-bis (4-hydroxyphenyl) cyclohexane, Hexane, 1,1-bis (4-hydroxyphenyl) decane, 1,4-bis (4-hydroxyphenyl) propane, (4-hydroxyphenyl) propane, 4,4'-dihydroxydiphenyl ether, 4,4'-dithiodiphenol, 4,4'-dihydroxy-3,3 ' -Dichlorodiphenyl ether, and 4,4'-dihydroxy-2,5-dihydroxy diphenyl ether. These may be used alone or in combination of two or more.

The polycarbonate may have a weight average molecular weight of 10,000 to 200,000, preferably 15,000 to 80,000. The polycarbonate resin of the present invention may be a branched chain, preferably 0.05 to 2 mol% of tri- or more polyfunctional compounds, for example, trivalent or more, based on the total amount of diphenols used in the polymerization Phenol < / RTI > group.

In the present invention, the polycarbonate is contained in an amount of 10 to 50% by weight, preferably 10 to 20% by weight, in order to balance the fluidity, heat resistance and mechanical properties of the final composition. If the content of the polycarbonate is less than 10% by weight, the effect of improving the flowability may be insignificant. If the content of the polycarbonate exceeds 50% by weight, the heat resistance may be rapidly lowered.

(C) Phosphoric acid ester compound

The phosphate ester compound used in the present invention is added together with the polycarbonate to improve the fluidity of the polyarylate, and a phosphate compound, a phosphonate compound or the like may be used alone or in combination of two or more thereof .

The phosphate ester compound may be at least one selected from the group consisting of trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, cresyldiphenyl phosphate, octyldiphenyl phosphate, , Tris (butoxyethyl) phosphate, trisisobutyl phosphate, bis- (isopropylphenyl) diphenyl phosphate, tris- (isopropylphenyl) phosphate, 1,3phenylene bis (diphenylphosphate) (Di (2,6-xylylenyl phosphate), bisphenol A bis (diphenylphosphate), resorcinol bisdiphenyl phosphate, octyldiphenyl phosphate, diethylene ethyl ester phosphate, dihydroxypropylene butyl ester phosphate, Ethylene di-sodium ester phosphate, t-butylphenyl diphenyl phosphate, bis- (t-butyl Tris (chloropropyl) phosphate, tris (chloropropyl) phosphate, bis (2,3-dibromopropyl) -2,3 Butylphosphonic acid, 2-methyl-propylphosphonic acid, t-butylphosphonic acid, 2,3-dimethylphosphoric acid, methylphosphonic acid, ethylphosphonic acid, ethylphosphonic acid, There may be mentioned acid addition salts such as dimethylbutylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, diethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, dioctylphosphinic acid, phenylphosphinic acid, diethylphenylphosphinic acid, (Diphenylphosphate), bisphenol A bis (diphenylphosphate), and resorcinol bis (diphenylphosphate) may be used in combination with at least one selected from the group consisting of 1,3-phenylene bis Or more.

The phosphoric acid ester compound may be contained in an amount of 0.1 to 10 parts by weight, preferably 3 to 4 parts by weight, based on 100 parts by weight of the total of the resin composition comprising the polyarylate and the polycarbonate. If the content of the phosphoric acid ester compound is less than 0.1 parts by weight, the effect of increasing the flowability may be insignificant, and if it exceeds 10 parts by weight, the heat resistance may be deteriorated.

(D) Phosphorus heat stabilizer

In the present invention, in order to realize excellent thermal stability without mixing a conventional phenolic antioxidant, other additives, and other polymers by adding a specific heat stabilizer to the polyarylate, pyrophosphate, pentaerythritol ester and diphosphoric acid A phosphorus-containing thermal stabilizer including at least two kinds selected from the group consisting of Preferably, the phosphorus thermal stabilizer may comprise the pyrophosphate, pentaerythritol ester and diphosphoric acid.

The phosphorus-based thermal stabilizer used in the present invention was confirmed as a material having excellent thermal stability even at a high temperature of 800 ° C or higher through a thermogravimetric analyzer (TGA). That is, in the case of the conventional phosphorus thermal stabilizer, when heat of 800 ° C or more is applied through a thermogravimetric analyzer (TGA), the phosphorus thermal stabilizer disappears by 80 to 90 wt% or more. It was found that the thermal stability was excellent enough to not lose more than 10 wt%.

The phosphorus thermal stabilizer is used in an amount of 0.1 to 10 wt%, preferably 4 to 7 wt%, in the final resin composition. If the content of the phosphorus thermal stabilizer is less than 0.1 wt%, the effect of improving the thermal stability may be insignificant. If the content of the phosphorus thermal stabilizer is more than 10 wt%, the increase in the effect relative to the addition amount may be insignificant.

In addition, the polyarylate resin composition according to the present invention may further contain an inorganic filler and a functional additive that meet the intended use or effect, in addition to the main components described above. For example, carbon fibers, talc, a flame retardant, a light stabilizer, a lubricant, a colorant, a lubricant, an ultraviolet stabilizer, an antioxidant, a coupling enhancer, a heat stabilizer, a plasticizer and an impact modifier can be further added.

The polyarylate resin composition according to the present invention is excellent in balance between fluidity, heat resistance and mechanical properties and can have a flow index (330 ° C, 2.16 kgf) according to ASTM D 1238 of 25 g / 10 min or more, preferably 32 g / 10 min or more, tensile strength according to ASTM D638 (50mm / min) is 700kgf / cm ² or more, preferably 720kgf / cm ² or higher number, and the flexural strength according to ASTM D790 (10mm / min) is 950 kgf / cm ² or more, and preferably may be 980 kgf / cm ² or more, the flexural strength modulus (10mm / min) is 23,000 kgf / cm ² or more, and preferably may be more than 24,000 kgf / cm ^2, heat distortion temperature (18.6kgf) according to ASTM D648 is 140 DEG C or higher, preferably 148 DEG C or higher.

Hereinafter, a specific embodiment of the present invention will be described.

First, the specifications of the components including the polyarylate resin used in Examples and Comparative Examples of the present invention are as follows.

(A) Polyarylate

(U-100, UniCasa) having a weight average molecular weight of 61,000, a number average molecular weight of 30,000, and a heat distortion temperature of 175 DEG C measured under a load of 18.6 kgf according to ASTM D648 was used.

(B) Polycarbonate

Bisphenol A type polycarbonate (PC-1600, Lotte Chemical) having a weight average molecular weight of 17,000 and a melt index of 60 g / 10 min (300 DEG C / 1.2 kg) was used.

(C) Phosphoric acid ester compound

Resorcinol bis [bis (2,6-dimethylphenyl) phosphate] (PX-200, Daihosseta) was used.

(D) Phosphorus heat stabilizer

A phosphorus-based thermal stabilizer (AODD, Synergy Material Co.) containing pyrophosphate, pentaerythritol ester and diphosphoric acid, which is 91.54% by weight in the case of heating at 800 ° C, was used.

(E) Antioxidant

Bis (2,4-dicumylphenyl) pentaerythritol-diphosphate (Doverphos S9228PC, Dover Chemical Co.) was used.

Example 1

2 parts by weight of a phosphoric acid ester compound (C) and 0.1 part by weight of a phosphorus-based thermal stabilizer (D) were mixed with 100 parts by weight of a total of 100 parts by weight of a resin containing 90 parts by weight of a polyarylate (A) and 10 parts by weight of a polycarbonate (B) The thermoplastic resin composition was made into a chip state by using a twin screw extruder heated to 140 DEG C, and dried at 140 DEG C for 6 hours using a hot air drier. The specimens of the examples and comparative examples were injection molded using a mold for specimen preparation.

Example 2

A specimen was formed in the same manner as in Example 1, except that 1 part by weight of phosphorus-based thermal stabilizer (D) was used in Example 1.

Example 3

A specimen was formed in the same manner as in Example 1, except that 4 parts by weight of phosphorus-based thermal stabilizer (D) was used in Example 1.

Example 4

A specimen was formed in the same manner as in Example 1, except that 7 parts by weight of phosphorus-based thermal stabilizer (D) was used in Example 1.

Example 5

A specimen was formed in the same manner as in Example 1, except that the phosphoric acid ester compound (C) was adjusted to 4 parts by weight in Example 1.

Example 6

A specimen was formed in the same manner as in Example 1, except that 4 parts by weight of the phosphoric acid ester compound (C) and 1 part by weight of the phosphorus-based thermal stabilizer (D) were used in Example 1.

Example 7

A specimen was formed in the same manner as in Example 1, except that 4 parts by weight of the phosphoric acid ester compound (C) and 4 parts by weight of the phosphorus-based thermal stabilizer (D) were used in Example 1.

Example 8

A specimen was formed in the same manner as in Example 1 except that 4 parts by weight of the phosphoric acid ester compound (C) and 7 parts by weight of the phosphorus thermal stabilizer (D) were used in Example 1.

Example 9

A specimen was formed in the same manner as in Example 1, except that 70 parts by weight of the polyarylate (A), 30 parts by weight of the polycarbonate (B) and 4 parts by weight of the phosphoric acid ester compound (A)

Example 10

Example 1 was prepared in the same manner as in Example 1 except that 70 parts by weight of the polyarylate (A), 30 parts by weight of the polycarbonate (B), 4 parts by weight of the phosphoric acid ester compound (C) and 1 part by weight of the phosphorus- And the test piece was molded in the same manner as in Example 1.

Example 11

Example 1 was prepared in the same manner as in Example 1 except that 70 parts by weight of the polyarylate (A), 30 parts by weight of the polycarbonate (B), 4 parts by weight of the phosphoric acid ester compound (C) and 4 parts by weight of the phosphorus- And the test piece was molded in the same manner as in Example 1.

Example 12

Example 1 was repeated except that 70 parts by weight of the polyarylate (A), 30 parts by weight of the polycarbonate (B), 4 parts by weight of the phosphoric acid ester compound (C) and 7 parts by weight of the phosphorus- And the test piece was molded in the same manner as in Example 1.

Comparative Example 1

30 parts by weight of the polyarylate (A) and 70 parts by weight of the polycarbonate (B) were mixed, and the thermoplastic resin composition was made into a chip state using a twin-screw extruder heated to 330 DEG C, After drying, the specimens of Examples and Comparative Examples were injection molded using a mold for specimen production.

Comparative Example 2

A specimen was formed in the same manner as in Comparative Example 1, except that 50 parts by weight of the polyarylate (A) and 50 parts by weight of the polycarbonate (B) in Comparative Example 1 were used.

Comparative Example 3

A specimen was formed in the same manner as in Comparative Example 1, except that 70 parts by weight of the polyarylate (A) and 30 parts by weight of the polycarbonate (B) in Comparative Example 1 were used.

Comparative Example 4

A specimen was formed in the same manner as in Comparative Example 1 except that 90 parts by weight of polyarylate (A) and 10 parts by weight of polycarbonate (B) in Comparative Example 1 were used.

Comparative Example 5

(C) phosphoric acid ester compound (2 parts by weight) was added to 100 parts by weight of the total of (A) and (B), which was adjusted to 90 parts by weight of the polyarylate (A) and 10 parts by weight of the polycarbonate The specimens were molded in the same manner as in Comparative Example 1.

Comparative Example 6

(C) phosphoric acid ester compound was added to 100 parts by weight of the total of (A) and (B), which was adjusted to 90 parts by weight of the polyarylate (A) and 10 parts by weight of the polycarbonate (B) in Comparative Example 1 The specimens were molded in the same manner as in Comparative Example 1.

Comparative Example 7

(D) 90 parts by weight of the polyarylate (A) and 10 parts by weight of the polycarbonate (B) in 100 parts by weight of the total of (A) and (B) The specimens were molded in the same manner as in Comparative Example 1.

Comparative Example 8

Comparative Example 1 was prepared by adding 90 parts by weight of the polyarylate (A) and 10 parts by weight of the polycarbonate (B), and adding 4 parts by weight of the phosphorus thermal stabilizer (D) to 100 parts by weight of the components (A) and The specimens were molded in the same manner as in Comparative Example 1.

Comparative Example 9

(D) 90 parts by weight of a polyarylate (A) and 10 parts by weight of a polycarbonate (B) in an amount of 7 parts by weight based on 100 parts by weight of the total of (A) and (B) The specimens were molded in the same manner as in Comparative Example 1.

Comparative Example 10

4 parts by weight of the phosphoric acid ester compound (C) and 4 parts by weight of (E) phosphoric acid ester were added to 100 parts by weight of the components (A) and (B), which were adjusted to 90 parts by weight of the polyarylate (A) and 10 parts by weight of the polycarbonate ) Antioxidant was added to 1 part by weight of the antioxidant.

Comparative Example 11

(C) phosphoric ester compound was added to 100 parts by weight of the total of (A) and (B), which was adjusted to 70 parts by weight of the polyarylate (A) and 30 parts by weight of the polycarbonate (B) in Comparative Example 1 The specimens were molded in the same manner as in Comparative Example 1.

Comparative Example 12

Comparative Example 1 was prepared by adding 70 parts by weight of the polyarylate (A) and 30 parts by weight of the polycarbonate (B), and 4 parts by weight of the phosphorus thermal stabilizer (D) to 100 parts by weight of the total of (A) The specimens were molded in the same manner as in Comparative Example 1.

Comparative Example 13

Comparative Example 1 was prepared by adding 70 parts by weight of the phosphorus thermal stabilizer (D) to 100 parts by weight of the components (A) and (B), which were adjusted to 70 parts by weight of the polyarylate (A) and 30 parts by weight of the polycarbonate (B) The specimens were molded in the same manner as in Comparative Example 1.

The components and compositions according to the above Examples and Comparative Examples are summarized in Tables 1 and 2 below.

Test Example

The flow index, tensile strength, flexural strength, flexural modulus and heat distortion temperature of the specimens according to Examples and Comparative Examples were measured according to the following methods, and the results are shown in Table 2 below.

(1) Flow Index (g / 10 min): The melt index (MI) of the resin flowing out for 10 minutes was measured using a 2.16 kg weight at 330 DEG C according to ASTM D1238.

(2) Tensile strength (kgf / cm ² ): The tensile strength was measured under the condition of 50 mm / min according to ASTM D638.

(3) Flexural strength and flexural modulus (kgf / cm ² ): Measured under the condition of 10 mm / min according to ASTM D790.

(4) Thermal deformation temperature (캜): The thermal deformation temperature was measured at a load of 18.6 kgf according to ASTM D648.

(A) polyarylate, (B) polycarbonate, (C) phosphoric acid ester compound and (D) phosphorus-based thermal stabilizer (see Examples 1 to 12) according to the present invention, It can be seen that the fluidity is improved while minimizing the mechanical properties and heat resistance of the polyarylate resin.

Particularly, when the weight ratio of the polyarylate (A) to the polycarbonate (B) is 90/10, and the weight ratio of the phosphoric ester (C) and the phosphorus thermal stabilizer (D) is 4/4 to 4/7, Is the most excellent.

On the other hand, in the case of the resin mixed with the polyarylate (A) and the polycarbonate (B) (see Comparative Examples 1 to 4), the fluidity was improved as the polycarbonate content was increased, but the heat resistance was drastically decreased .

It was also found that when the phosphoric acid ester (C) alone was added to the resin (A) mixed with the polyarylate and the polycarbonate (see Comparative Examples 5 and 6), the heat resistance was deteriorated separately from the fluidity improvement have.

(D) phosphorus-based heat stabilizer alone was added to the resin (A) and the polycarbonate (B), the flowability and heat resistance were improved, but (C) It can be seen that the contrast effects of Examples 1 to 12 are remarkably low.

(E) phosphorus-based antioxidant other than the phosphoric acid ester and the heat stabilizer (D) were added to the resin (A) mixed with the polyarylate and the polycarbonate (Comparative Example 10) It can be seen that the heat resistance is not affected.

(C) Phosphoric acid ester or (D) phosphorus-based thermal stabilizer was used in the case where the weight ratio of the polyarylate (A) to the polycarbonate (B) was adjusted to 70/30 (see Comparative Examples 11 to 13) It can be understood that the lowering of the heat resistance can not be prevented.

The preferred embodiments of the present invention have been described in detail above. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the description of the invention, and all changes or modifications derived from the meaning, scope and equivalence of the claims are deemed to be included in the scope of the present invention. .

Claims (7)

0.1 to 10 parts by weight of a phosphoric acid ester compound and 0.1 to 10 parts by weight of a phosphorus-based thermal stabilizer, based on 100 parts by weight of the total of the resin comprising 50 to 90 parts by weight of a polyarylate and 10 to 50 parts by weight of a polycarbonate. The method according to claim 1,
Wherein the polyarylate has a heat distortion temperature of 170 DEG C or higher as measured according to ASTM D648 under a load of 18.6 kgf. The method according to claim 1,
Wherein the polycarbonate has a weight average molecular weight of 10,000 to 200,000. The method according to claim 1,
Wherein the phosphoric acid ester compound is at least one selected from the group consisting of 1,3 phenylene bis (diphenyl phosphate), bisphenol A bis (diphenyl phosphate) and resorcinol bis (dimethyl phenyl phosphate). . The method according to claim 1,
The polyarylate resin composition according to claim 1, wherein the phosphorus thermal stabilizer has a residual value of 90 wt% or more when measured by a thermal method.
[Measurement method of thermal property]
The residue is measured using a thermogravimetric analyzer (TGA) when heat is applied at 800 ° C. 6. The method of claim 5,
Wherein the phosphorus thermal stabilizer comprises at least two members selected from the group consisting of pyrophosphate, pentaerythritol ester and diphosphoric acid. The method according to claim 1,
The polyarylate resin composition had a flow index (330 占 폚, 2.16 kgf) of 25 g / 10 min or more, a tensile strength (50 mm / min) of 700 kgf / cm ² or more and a flexural strength (10 mm / min) 950 is kgf / cm ² or more, the flexural strength modulus (10mm / min) and the 23,000 kgf / cm ² or more, a heat distortion temperature (18.6kgf) a polyarylate resin composition, characterized in that more than 140 ℃:
[How to measure]
The melt index (MI) of the specimen made of the polyarylate resin composition was measured for 10 minutes using a weight of 2.16 kg at a measurement temperature of 330 캜 according to ASTM D1238, and the tensile strength at 50 mm / min under ASTM D638 The strength was measured and the flexural strength and flexural strength modulus were measured under 10 mm / min according to ASTM D790 and the heat distortion temperature (HDT) was measured at 18.6 kgf according to ASTM D648.