JP2002226571A - Copolymerized polycarbonate, method for producing the same and resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a copolymerized polycarbonate free from bleed out and having excellent ultraviolet cut-off effect. SOLUTION: The copolymerized polycarbonate contains an O,O'- dihydroxybenzophenone compound of formula (2) (wherein, R5 and R6 are each H or an alkyl) as a copolymer component in a polycarbonate whose main recurring unit is expressed by formula (1) (wherein, R1, R2, R3 and R4 are each H, an alkyl, an aralkyl or an aryl; and W is an alkylidene, an alkylene, a cycloalkylidene, a cycloalkylene, a phenyl-substituted alkylene, O, S, sulfoxide or sulfone). The amount of the copolymer component is 0.01-5 mol% based on 1 mol of the dihydroxy compound of the polymerization raw material, and the polycarbonate has an intrinsic viscosity of 0.2-2.0 dl/g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a copolymerized polycarbonate having excellent light resistance, no volatilization of the agent during melt molding, no bleeding out of the agent from the surface of the molded piece, and an excellent ultraviolet ray cut effect. More specifically, the present invention relates to a light-stabilized polycarbonate containing a specific O, O'-dihydroxybenzophenone-based compound in a main chain, and a resin composition using the same.

[0002]

2. Description of the Related Art 2,2-bis (4-hydroxyphenyl) propane (hereinafter abbreviated as bisphenol A or BPA) and phosgene which is a precursor for forming a carbonate bond, diphenyl carbonate which is a kind of carbonic acid diester, etc. Polycarbonate manufactured from is transparent,
It is used in many fields because of its excellent heat resistance and dimensional stability. In recent years, polycarbonates have been used in large quantities for optical applications such as optical disks, lenses, and transparent plates by utilizing the excellent optical characteristics of polycarbonate. Especially in the case of spectacle lenses, fashionability and safety are also important factors, and it is also required to cut off ultraviolet rays harmful to the eyes. Therefore, a method has been proposed in which a small amount of an ultraviolet absorber is contained in order to improve the ultraviolet cut effect of polycarbonate.

[0003] However, ordinary ultraviolet absorbers have a drawback that they volatilize during the melt extrusion of the polycarbonate composition or during the molding process, thereby contaminating the working environment and bleeding out from the surface of the molded product. In order to prevent this volatilization and bleed-out, a method of using a UV absorber having a relatively large molecular weight or a method of copolymerizing has been proposed. Occasionally, problems such as large coloring were observed.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to provide, during melt molding, 1) no volatilization of an ultraviolet absorbing substance and no bleed-out from the surface of a molded article, and 2) an excellent ultraviolet cutting effect. (3) An object of the present invention is to provide a copolymerized polycarbonate having a feature that a molded article is less colored, a method for producing the same, and a resin composition using the same. The present inventor has conducted intensive studies on the modification of polycarbonate to achieve the above object, and as a result, by copolymerizing a specific amount of an ultraviolet absorbing substance having a specific structure, while maintaining the transparency and moldability of the polycarbonate. The present inventors have found that there is no contamination of the working environment due to the volatilization of the ultraviolet absorber, and that a polycarbonate having an excellent ultraviolet cut effect with less bleed-out can be obtained. The present invention has been completed based on this finding.

[0005]

That is, the present invention is as described below. 1. The main repeating unit is the following formula (1)

[0006]

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[R ¹ , R ² , R ³ and R ⁴ each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms, or an aryl group having 6 to 10 carbon atoms; W is an alkylidene group, an alkylene group, a cycloalkylidene group,
A cycloalkylene group, a phenyl group-substituted alkylene group, an oxygen atom, a sulfur atom, a sulfoxide group, or a sulfone group. ] In the polycarbonate represented by the following formula (2)

[0008]

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Wherein R ⁵ and R ⁶ are each independently a hydrogen atom,
Represents an alkyl group having 1 to 10 carbon atoms. O,
The copolymerization amount of the O'-dihydroxybenzophenone-based compound is
0.01 to 5 mol%, and the intrinsic viscosity is 0.2 to
2.0 dl / g copolymerized polycarbonate.

[0010] 2. In the polycarbonate whose main repeating unit is represented by the above formula (1), the copolymerization amount of the O, O'-dihydroxybenzophenone-based compound represented by the above formula (2) is based on 1 mol of the dihydroxy compound as a polymerization raw material. , 0.1 to 20 mol%, and an intrinsic viscosity of 0.05 to less than 0.2 dl / g.

3. 1. A dihydroxy compound, an O, O'-dihydroxybenzophenone-based compound represented by the above formula (2), and a carbonate bond-forming precursor are melt-polymerized in the presence of a transesterification catalyst. And 2. 3. The method for producing a copolymerized polycarbonate described in 1. above.

4.2. A resin composition using the copolymerized polycarbonate described in 1 and a thermoplastic resin.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (Copolymeric polycarbonate) The polycarbonate referred to in the present invention is preferably represented by the following formula (1):

[0014]

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[R ¹ , R ² , R ³ and R ⁴ each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms, or an aryl group having 6 to 10 carbon atoms; W is an alkylidene group, an alkylene group, a cycloalkylidene group,
A cycloalkylene group, a phenyl group-substituted alkylene group, an oxygen atom, a sulfur atom, a sulfoxide group, or a sulfone group. ] It has a main repeating unit represented by these. The polycarbonate is produced by reacting a dihydroxy compound corresponding to the repeating unit represented by the above formula (1) with a carbonate bond-forming precursor by an interfacial polymerization method or, preferably, a melt polymerization method. The polycarbonate preferably used in the present invention is a dihydroxy compound,
In particular, it is obtained by reacting an aromatic dihydroxy compound with a carbonate bond-forming precursor by a melt polymerization method. The effect of the present invention is particularly large when the polycarbonate according to the present invention is an aromatic polycarbonate or the dihydroxy compound is an aromatic dihydroxy compound. In the present specification, various addition amounts are defined as amounts relative to the dihydroxy compound, but in this case, the amount relationship is
It is particularly suitable when the dihydroxy compound is an aromatic dihydroxy compound.

In one embodiment of the present invention, the main repeating unit is a polycarbonate represented by the above formula (1):
The copolymerization amount of the O, O'-dihydroxybenzophenone-based compound (A) represented by the above formula (2) is 0.01 to 5 mol% per 1 mol of the dihydroxy compound as a polymerization raw material, and the intrinsic viscosity is It is a high molecular weight copolymerized polycarbonate having a molecular weight of 0.2 to 2.0 dl / g. The copolymerized polycarbonate itself is suitable for being used as a raw material for various molding resins or a composition for producing molded articles. The copolymerization amount is more preferably from 0.05 to 4 mol%, particularly preferably from 0.1 to 3 mol%. In the present invention, the O, O'-dihydroxybenzophenone-based compound (A) is not only used as a copolymer component,
At the same time, a state in which a small amount is contained in polycarbonate is also included. However, in this case, the benzophenone-based compound may volatilize, and the content of the benzophenone-based compound is preferably suppressed. The amount contained in the form of the monomer is preferably in the range of 2000 ppm or less, more preferably 1000 ppm or less, more preferably 500 ppm or less.

If the copolymerization amount of the O, O'-dihydroxybenzophenone compound (A) is too small, it is difficult to sufficiently exert an ultraviolet ray cutting effect, and if it is too large, a gel-like polycarbonate is formed and cannot be used. It is important to pay attention to this. In addition, the intrinsic viscosity is preferably in the range of 0.3 to 1.5, more preferably 0.33 to 1.0, and particularly preferably 0, in which the mechanical properties of the molded article can be suitably exhibited as a resin molding resin. .38 to 0.9 dl / g.

In another embodiment of the present invention, the copolymerization amount of the O, O'-dihydroxybenzophenone-based compound (A) is determined based on 1 mole of the dihydroxy compound as a polymerization raw material.
0.1 to 20 mol%, and the intrinsic viscosity is 0.05 to
It is a low molecular weight copolymerized polycarbonate having less than 0.2 dl / g. It is also a preferred application that the low molecular weight copolycarbonate is used as an ultraviolet absorber in a composition with another thermoplastic resin. The intrinsic viscosity of the copolycarbonate used in such applications is
0.05 to less than 0.2 dl / g, more preferably 0.1 to 0.1 dl / g.
06 to less than 0.2 dl / g, particularly preferably 0.07 to less than 0.2 dl / g
It is in the range of 0.17 dl / g. The copolymerization amount is preferably 0.1 to 18 mol%, more preferably 1 to 15 mol%. In the present invention, not only the O, O'-dihydroxybenzophenone-based compound (A) is contained as a copolymer component but also a state in which the O, O'-dihydroxybenzophenone-based compound (A) is contained in a small amount within the range in which the above-mentioned problem does not occur. are doing. However, in this case, the benzophenone-based compound may volatilize, and the content of the benzophenone-based compound is preferably suppressed. The amount contained in the form of the monomer is preferably in the range of 2000 ppm or less, more preferably 1000 ppm or less, more preferably 500 ppm or less.

The low molecular weight copolymerized polycarbonate having a large copolymerization amount of the O, O'-dihydroxybenzophenone-based compound (A) has a limiting viscosity within the above-mentioned range, so that a branched structure is developed. The formation can be prevented and the compatibility with other resins is good.
In addition, when the copolymerized polycarbonate of the present invention is melt-mixed in another resin, there is an advantage that environmental pollution due to volatilization can be controlled to a low level.

When a resin composition is produced using the low-molecular-weight copolymerized polycarbonate, the compounding amount of the low-molecular-weight copolymerized polycarbonate is determined by adding O,
The content of the copolymer component derived from the O'-dihydroxybenzophenone-based compound is 0.015 to 5 wt%, preferably 0.05 to 4 wt%, more preferably 0.1 to 3 wt%.
wt%, particularly preferably in the range of 0.2 to 3 wt%.

(Production Method of Copolymerized Polycarbonate: Raw Material for Polymerization) Still another embodiment of the present invention relates to a dihydroxy compound and an O, O'-dihydroxybenzophenone compound represented by the above formula (2) and a precursor capable of forming a carbonate bond. Are produced by melt polymerization in the presence of a transesterification catalyst.

As the dihydroxy compound used in the method for producing the copolymerized polycarbonate of the present invention,
Specifically, bis (4-hydroxyphenyl) methane,
2,2-bis (4-hydroxyphenyl) propane,
2,2-bis (4-hydroxy-3-methylphenyl)
Propane, 1,1-bis (4-hydroxyphenyl)-
1-phenylethane, 4,4 ′-[1,3-phenylenebis (1-methylethylidene)] bisphenol, 4,
Such as 4 '-[1,4-phenylenebis (1-methylethylidene)] bisphenol, 9,9-bis (4-hydroxyphenyl) fluorene, and 9,9-bis (4-hydroxy-3-methylphenyl) fluorene; Bis (4-hydroxyaryl) alkane and the like are preferred.

Also, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane,
-[1- [3- (4-hydroxyphenyl) -4-methylcyclohexyl] -1-methylethyl] -phenol, 4,4 '-[1-methyl-4- (1-methylethyl) -1,3 -Cyclohexanediyl] bisphenol, 2,2,2 ', 2'-tetrahydro-3,3
3 ', 3'-tetramethyl-1,1'-spirobis-
Also preferred are bis (hydroxyaryl) cycloalkanes such as [1H-indene] -6,6'-diol.

Dihydroxyaryl ethers such as bis (4-hydroxyphenyl) ether and 4,4'-dihydroxy-3,3'-dimethylphenyl ether are also included.

Dihydroxydiaryl sulfides such as 4,4'-dihydroxydiphenyl sulfide and 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide are also included.

Dihydroxydiarylsulfoxides such as 4,4'-dihydroxydiphenylsulfoxide and 4,4'-dihydroxy-3,3'-dimethyldiphenylsulfoxide;4,4'-dihydroxydiphenylsulfone;4,4'-dihydroxy-3 Dihydroxydiarylsulfones such as 3,3'-dimethyldiphenylsulfone;4,4'-dihydroxydiphenyl-3,3'
-Dihydroxydiarylisatins such as isatin;
Examples thereof include dihydroxydiarylxanthenes such as 3,6-dihydroxy-9,9-dimethylxanthene.

Among them, 2,2-bis (4-hydroxyphenyl) propane (BPA) is preferred because of its stability as a monomer and the fact that it has a small amount of impurities contained therein and is easily available. .

In the present invention, control of the glass transition temperature,
Improve fluidity, increase refractive index or reduce birefringence, etc.
For the purpose of controlling optical properties, etc., one or two kinds of monomers may be added to the aromatic polycarbonate as needed.
It is also possible to include more than one species.

Specific examples of these compounds include aliphatic dihydroxy compounds such as 1,4-butanediol and 1,4-butanediol.
4-cyclohexanedimethanol, 1,10-decanediol, 3,9-bis (1,1-dimethyl-2-hydroxyethyl) -2,4,8,10-tetraoxaspiro [5,5] undecane, tricyclo Decandimethanol and the like.

Examples of the aromatic dihydroxy compound include resorcin, hydroquinone, and 5-t which are not included in the above formula (1).
-Butylhydroquinone, 2-phenylhydroquinone, 2
And dihydroxybenzenes such as -cumylhydroquinone and 4,4-dihydroxydiphenyl.

As the dicarboxylic acid, for example,
Examples of terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, adipic acid, and cyclohexanedicarboxylic acid, and examples of the oxyacid include p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, and lactic acid.

The carbonate bond forming precursor includes:
In the solution method, a carbonyl halide such as phosgene or a haloformate compound is used. In the melting method, an aromatic carbonate is used, and specifically, diphenyl carbonate, ditolyl carbonate or the like is used. In addition, dimethyl carbonate, dicyclohexyl carbonate and the like can be used if desired. Of these, diphenyl carbonate is very preferable in terms of reactivity, stability against coloring of the obtained resin, and furthermore, cost.

In the production of the polycarbonate, a dicarboxylic acid, a dicarboxylic acid dihalide, a dicarboxylic acid diester or the like and a dicarboxylic acid derivative such as a dicarboxylic acid diester are used together with the carbonic acid diester. The agent of the invention can be used effectively.

The dicarboxylic acid derivatives which are ester bond forming precursors include: aromatic dicarboxylic acid derivatives such as terephthalic acid, terephthalic dichloride, diphenyl terephthalate, diphenyl isophthalate; succinic acid, dodecanoic acid, dimer acid, dodecanni Aliphatic dicarboxylic acid derivatives such as diphenyl acid; alicyclic dicarboxylic acid derivatives such as 1,3-cyclohexanedicarboxylic acid dichloride and 1,4-cyclohexanedicarboxylic acid diphenyl;

Further, together with the above-mentioned dihydroxy compound,
A polyfunctional compound having three or more functional groups in one molecule can be used in combination. As such a polyfunctional compound, a compound having a phenolic hydroxyl group or a carboxy group is preferably used. Specifically, for example, 1,1,1-tris (4-hydroxyphenyl) ethane, α, α ′,
α "-tris (4-hydroxyphenyl) -1,3,5
-Triisopropylbenzene, 1,3,5-tris (4
-Hydroxyphenyl) benzene, trimellitic acid and the like.

When a polyfunctional compound is used in combination for the purpose of increasing the melt viscosity of polycarbonate, for example, the compound is used in an amount of 0.03 mol or less, preferably 0.00005 to 0.02 mol, per 1 mol of the dihydroxy compound. More preferably, it is selected in the range of 0.0001 to 0.01 mol.

The O, O'-dihydroxybenzophenone compound (A) used in the present invention is represented by the above formula (2)
A compound having a benzophenone skeleton represented by the formula: bis (2,4-dihydroxyphenyl)
Ketone, bis (2,4-dihydroxy-5-methylphenyl) ketone, bis (2,4-dihydroxy-5-t-)
Butylphenyl) ketone, bis (2,4-dihydroxy-5-t-amylphenyl) ketone, bis (2,4-dihydroxy-6-ethylphenyl) ketone, bis (2
4-dihydroxy-6-t-amylphenyl) ketone,
Bis (2,4-dihydroxy-6-cumylphenyl) ketone, bis (2,4-dihydroxy-5-phenylphenyl) ketone, bis (2,4-dihydroxy-5-phenoxyphenyl) ketone, bis (2,4- Examples thereof include dihydroxy-5-butoxyphenyl) ketone, (2,4-dihydroxy-5-methylphenyl) (2,4-dihydroxyphenyl) ketone, and bis (2,4-dihydroxy-5-chlorophenyl) ketone.

Of these, bis (2,4-dihydroxyphenyl) ketone and bis (2,4-dihydroxy-5)
(-Chlorophenyl) ketone is preferably used when judged from both the ultraviolet light stabilizing ability and the heat stability.

(Production Method of Copolymerized Polycarbonate: Catalyst) Next, in the method for producing a polycarbonate represented by the repeating unit (1) of the present invention, in the above-mentioned interfacial polymerization method, a tertiary amine and a quaternary ammonium salt are used as catalysts. And quaternary phosphonium salts, nitrogen-containing heterocyclic compounds and salts thereof, imino ethers and salts thereof, and compounds having an amide group.

In the interfacial polymerization method, a large amount of an alkali metal compound or an alkaline earth metal compound is used as a scavenger for hydrogen halide such as hydrochloric acid generated during the reaction.
It is preferable to perform sufficient washing and purification so that such impurities do not remain in the polymer after production.

In the present invention, among the polycarbonates produced by the melt method, a) a nitrogen-containing basic compound and / or a phosphorus-containing basic compound and a) an alkali metal compound are used in the presence of a transesterification catalyst, especially as a transesterification catalyst. Polycarbonates which have been polycondensed in the presence of a transesterification catalyst are preferably used for the purpose of the present invention, ie for the stability during molding. The catalyst system is a catalyst system suitably used in solid-state polymerization.

As the catalyst system used in the melting method, a catalyst system containing an alkali metal compound is preferably used, but the amount of the alkali metal used is 0.01 × 10 ^-6 to 1 mol of the dihydroxy compound. It is important to make 2 × 10 ^-6 equivalents. Outside the above range, there are problems such as adverse effects on the physical properties of the obtained polycarbonate, or cases in which the transesterification does not proceed sufficiently and a high molecular weight polycarbonate may not be obtained.
Not preferred.

Examples of the alkali metal compound include hydroxides, carbonates, cyanates, thiocyanates, organic carboxylate salts, borohydride salts, hydrogen phosphates, bisphenols, and the like, which are conventionally known as transesterification catalysts. Phenol salts and the like.

Specific examples include sodium hydroxide, lithium carbonate, potassium acetate, rubidium nitrate, sodium nitrite, potassium sulfite, sodium cyanate, sodium thiocyanate, potassium thiocyanate, lithium stearate, sodium borohydride, hydrogen hydride Examples thereof include lithium boron, sodium phenylated boron, sodium benzoate, dipotassium hydrogen phosphate, disodium salt of bisphenol A, and sodium potassium salt of bisphenol A.

As a cocatalyst, a nitrogen-containing basic compound and / or
Alternatively, it is preferable to use a phosphorus-containing basic compound in combination. Specific examples of the nitrogen-containing basic compound include, for example, quaternary ammonium hydroxides having an alkyl, aryl, alkylaryl group and the like such as tetramethylammonium hydroxide, tetrabutylammonium hydroxide and benzyltrimethylammonium hydroxide; Basic ammonium salts having an alkyl, aryl, alkylaryl group or the like such as methylammonium acetate, tetraethylammonium phenoxide or tetrabutylammonium carbonate; tertiary amines such as triethylamine; or tetramethylammonium borohydride or tetrabutylammonium borohydride Basic salts such as hydride and tetramethylammonium tetraphenylborate can be exemplified. Specific examples of the phosphorus-containing basic compound include, for example, quaternary phosphonium hydroxides having an alkyl, aryl, alkylaryl group and the like such as tetrabutylphosphonium hydroxide and benzyltrimethylphosphonium hydroxide; Basic salts such as butylphosphonium tetraphenylborate and the like can be mentioned.

The above-mentioned nitrogen-containing basic compound and / or
Basic compounds are basic nitrogen atoms or basic phosphorus
Atom is an aromatic dihydroxy compound, 20 moles per 1 mole
10 ^-6~ 1000 × 10^-6To be used at the equivalent ratio
preferable. A more desirable use ratio is 3 for the same standard.
0x10^-6~ 700 × 10^-6It is a ratio that becomes equivalent. Special
The preferred ratio is 50 × 10^-6~ 500
× 10^-6It is a ratio that becomes equivalent.

(Production Method of Copolymerized Polycarbonate: Main Additives) The copolymerized polycarbonate of the present invention has a melt viscosity stability of 0.5% or less. To the polycarbonate after the polycondensation reaction or, if desired, after the end of the capping reaction of the terminal hydroxyl group, a specific amount of the melt viscosity stabilizer (D) is added. By using a polycarbonate having such a melt viscosity stability, the copolymerized polycarbonate of the present invention and a resin composition using the same can have a melt viscosity stability of 0.5% or less.

In the case of a copolymer polycarbonate having inferior melt viscosity stability and a resin composition using the same, in addition to poor stability at the time of molding processing, mechanical properties under high humidity conditions and long-term use of molded articles Is particularly poor in stability, particularly the impact resistance is remarkably deteriorated (that is, deteriorated), and often cannot be put to practical use.

The melt viscosity stabilizer used in the present invention is:
(D) -1: sulfonic acid phosphonium salt, ammonium salt and / or (D) -2; sulfonic acid and / or lower ester of sulfonic acid.

Specific examples of the compound represented by the formula (D) -1 include: tetrabutylphosphonium benzenesulfonate, tetrabutylphosphonium dodecylbenzenesulfonate, tetramethylammonium decylsulfonate, dodecyl And tetrabutylammonium benzenesulfonate.

(D) -2: The sulfonic acids and lower esters of sulfonic acids include aromatic sulfonic acids such as p-toluenesulfonic acid, aliphatic sulfonic acids such as octadecylsulfonic acid, butyl benzenesulfonate, and hexadecylsulfonic acid. Ethyl and butyl decylsulfonate are exemplified.

Preferably, an ester compound is used rather than the sulfonic acid itself. Such a melt viscosity stabilizer is effective for a polycarbonate produced by the phosgene method, but it reduces the activity of a basic alkali metal compound remaining in a polycarbonate produced by a melt polymerization method or a solid phase polymerization method. It is effective for

With respect to the amount used, the alkali metal element of the basic alkali metal compound catalyst, per one chemical equivalent,
In the compound of (D) -1, 0.7 to 50 chemical equivalents, preferably 0.8 to 20 chemical equivalents, more preferably 0.9 to 10 chemical equivalents, and in the compound of (D) -2, 0 to 50 chemical equivalents. By using 7 to 20 chemical equivalents, preferably 0.8 to 10 chemical equivalents, and more preferably 0.9 to 5 chemical equivalents, the melt viscosity of the copolymerized polycarbonate and the resin composition using the same are stabilized. Properties can be suppressed to 0.5% or less.

When the melt viscosity stabilizer (D) -2 is used, it is preferable to apply a reduced pressure treatment to the melt viscosity stabilized polycarbonate. In performing such a decompression process, the type of the processing apparatus is not particularly limited.
On the other hand, when the melt viscosity stabilizer (D) -1 is used, it is not necessary to perform such a decompression treatment.

The depressurization treatment is carried out in a vertical tank reactor, a horizontal tank reactor or a single-screw or twin-screw extruder having a pressure of 6.7 to 8 × 10 ³ Pa, preferably 1.3 × 10 ³ Pa.
Reduced pressure treatment under reduced pressure of ⁴ Pa or less is preferred. The reduced pressure treatment time is about 5 minutes to 3 hours in a tank reactor, about 5 seconds to 15 minutes when a twin screw extruder is used, and the treatment temperature is 2 minutes.
It can be carried out at 40 ° C to 350 ° C. The decompression treatment can be performed simultaneously with pelletization by an extruder. By performing the above-described reduced pressure treatment, the raw material monomers remaining in the polycarbonate are reduced or completely removed.

In the present invention, the molecular terminal structure of the polycarbonate is preferably substantially composed of an aryloxy group and a phenolic hydroxyl group, and has a phenolic terminal group concentration of 40 mol% or more. . As the aryloxy group, a substituted or unsubstituted phenyloxy group of a hydrocarbon group having 1 to 20 carbon atoms is preferably selected. From the viewpoint of thermal stability, the above-mentioned substituted hydrocarbon group is preferably a tertiary alkyl group, tertiary aralkyl group, aryl group or simply a hydrogen atom. Specific examples of preferred aryloxy groups include a phenoxy group, a 4-t-butylphenyloxy group, a 4-t-amylphenyloxy group, a 4-phenylphenyloxy group,
-A cumylphenyloxy group and the like.

An organic bluish colorant may be used in the copolymerized polycarbonate of the present invention in order to improve the organoleptic sensitivity of a molded article. Among these, macrolex violet and Triazole Blue RLS are preferred.

These coloring agents may be used alone,
Or you may use it by mixing. These colorants are usually used in an amount of 0.1 to 100 parts by weight of the resin component of the copolymerized polycarbonate.
001 × 10 ^-4 to 10 × 10 ^-4 parts by weight, preferably ^0.1 to 10 × 10 ^-4 parts by weight.
It can be used in an amount of 05 × 10 ^{−4 to} 5 × 10 ⁻⁴ parts by weight, more preferably 0.1 × 10 ^{−4 to} 3 × 10 ⁻⁴ parts by weight.

Various conventionally known additives can be applied to the copolymerized polycarbonate of the present invention, if desired. For example, a conventionally known flame retardant exemplified below may be used in combination as the flame retardant.

For example, the phosphoric ester compounds include trimethyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, triphenyl phosphate, octyl diphenyl phosphate, tris (chloroethyl) phosphate, tris (dichloropropyl) phosphate, bis (2,3-dibromophosphate). Propyl) -2,3-dichloropropyl phosphate, tris (2,3-dibromopropyl) phosphate and, if desired, polytetrafluoroethylene (Teflon (registered trademark)) or the like as an anti-drip agent.

In the present invention, a copolycarbonate having excellent durability and stability can be obtained. When molding various molded articles using the same, conventionally known processing stabilizers, heat stabilizers, An antioxidant, an ultraviolet absorber, an antistatic agent, a release agent and the like may be added.

For example, if desired, a usual heat stabilizer such as the following can be added to prevent a decrease in molecular weight and deterioration of hue. As such a stabilizer, specifically,
For example, conventionally known phosphorus-based stabilizers, organic thioether stabilizers, hindered amine stabilizers and the like can be mentioned.

As the phosphorus-based stabilizer, the following phosphorus-based stabilizers may be used if desired. As the phosphorus-based stabilizer used in the present invention, for example, those commercially available from stabilizer manufacturers as antioxidants can be used.

For example, as phosphites; bis (2,
Arylalkyls such as 4-di-t-butylphenyl) pentaerythrityl diphosphite; trialkyl phosphites such as distearyl pentaerythrityl diphosphite; tricycloalkyl phosphites such as tricyclohexyl phosphite; And triaryl phosphites such as tris (2,4-di-tert-butylphenyl) phosphite.

Phosphoric esters such as tristearylpentaerythrityl diphosphate and tricyclohexyl phosphite such as tricyclohexyl phosphite; triaryl phosphates such as tris (2,4-di-tert-butylphenyl) phosphate and others And phosphonites.

Examples of the thioether stabilizer include dimyristyl-3,3'-thiodipropionate and the like, and hindered amine stabilizers such as bis (2,2,6,6).
6, -tetramethyl-4-piperidyl) sebacate, 2-
(3,5-di-t-butyl-4-hydroxybenzyl)-
Bis (1,2,2,6,6-pentamethyl-4-piperidyl) 2-n-butylmalonate and the like can be mentioned.

These heat stabilizers may be used alone or in combination of two or more. The amount of the heat stabilizer is preferably 0.0001 to 1 part by weight, more preferably 0.0005 to 100 parts by weight, based on 100 parts by weight of the copolymerized polycarbonate of the present invention.
-0.5 weight part is more preferable, and 0.001-0.1 weight part is still more preferable. These may be used alone or 2
You may mix and use more than seeds.

As the acidic substance scavenger, an alicyclic epoxy compound having at least one epoxy group in the molecule can be preferably used. In particular, 3,4-epoxycyclohexylmethyl-3 ′, 4′-epoxycyclohexylcarboxylate can be preferably used. Such an epoxy compound is 1 × based on 100 parts by weight of polycarbonate.
10 ^{-4 to} 2000 × 10 ^-4 parts by weight, preferably 10 × 1
It is added in an amount of 0 ^{-4 to} 1000 × 10 ^-4 parts by weight. These may be used alone or as a mixture of two or more.

Since the copolymerized polycarbonate of the present invention has excellent weather resistance and ultraviolet absorbing ability, it is not necessary to add a conventionally known ultraviolet absorbing agent, but it is optionally used as long as the object of the present invention is not impaired. Things are also possible.
For example, benzotriazole compounds such as 2- (3,5-di-t-butyl-2-hydroxyphenyl) benzotriazole, benzophenone compounds such as 2-hydroxy-4-octyloxybenzophenone, and 2,4 as light stabilizers -Di-t-butylphenyl 3,5-di-t-
Benzoate compounds such as butylphenyl-4-hydroxybenzoate and cyanoacrylate compounds such as 2-cyano-3,3-diphenylacrylate can be mentioned.

These light stabilizers and ultraviolet absorbers are usually used in an amount of 0.00% by weight based on 100 parts by weight of the copolymerized polycarbonate component.
It can be used in an amount of 1 to 5 parts by weight, preferably 0.005 to 1 important part, more preferably 0.01 to 0.5 part by weight. These agents may be used alone or as a mixture.

(Other Additives) In the present invention, conventionally known additives may be used as long as the object of the present invention is not impaired.

Quencher such as {2,2′-thiobis (4-t-octylphenolate)}-2-ethylhexylamine nickel, N, N ′-{3- (3,5-
Metal deactivators such as di-t-butyl-4-hydroxyphenyl) propionyl hydrazine; metal soaps such as calcium thearate and nickel stearate; and other dibenzylidene sorbitol and methylene bis (2,4-di-
nucleating agents such as sodium salt of (t-butylphenyl) acid phosphate;

Other examples include antistatic agents such as quaternary ammonium salts such as (β-lauramidopropyl) trimethylammonium sulfate and sodium dodecylbenzenesulfonate, sulfonate compounds and alkylphosphate compounds. In the resin of the present invention, a coloring agent such as an organic or inorganic dye or pigment can be used, if desired.

In order to incorporate the above-mentioned various additives into the copolymerized polycarbonate of the present invention, any conventionally known method is employed. For example, a method of mixing with a tumbler, a V-type blender, a super mixer, a Nauta mixer, a Banbury mixer, a kneading roll, an extruder or the like is appropriately used. The polymer thus obtained is pelletized as it is or by a melt extruder, and then formed into a sheet by a melt extrusion method.

(Resin Composition Using Copolymerized Polycarbonate) As described above, the following thermoplastic resin is blended with the copolymerized polycarbonate of the present invention for a specific purpose within the range not impairing the object of the present invention. Can also. In particular, the content of the O, O'-dihydroxybenzophenone-based compound (A) is
0.1 to 20 mol%, and the intrinsic viscosity is 0.05 to
The low-molecular-weight copolycarbonate according to claim 2, which is 0.2 dl / g, can be preferably added for the purpose of improving the stability of the thermoplastic resin to ultraviolet light.

Examples of such other thermoplastic resins include polyamide resins, polyimide resins, polyetherimide resins, polyurethane resins, polyphenylene ether resins, polyphenylene sulfide resins, polysulfone resins, polyolefin resins such as polyethylene and polypropylene, polyethylene terephthalate, and the like. Polyester resin such as polybutylene terephthalate, amorphous polyarylate resin, polystyrene resin, acrylonitrile / styrene copolymer (AS resin), acrylonitrile / butadiene / styrene copolymer (ABS resin), polymethacrylate resin, phenol resin, epoxy Examples of the resin include a resin. When a low molecular weight copolymerized polycarbonate is used, it is also preferable to add a polycarbonate produced by a melt polymerization method or an interfacial polymerization method as the thermoplastic resin.

The resin composition of the present invention may contain various additives to be added to the above-mentioned copolymerized polycarbonate within a range not to impair the object of the present invention. As a method of compounding these resins and various additives, a method similar to the method of compounding the additives with the above-described copolymerized polycarbonate is preferably used.

(Use) A molded article having good flame retardancy, antistatic property, dust adhesion preventing property, durability and stability can be obtained from the copolymerized polycarbonate and the resin composition of the present invention by an injection molding method or the like. it can.

The resin composition of the present invention may contain various additives to be added to the above-mentioned copolymerized polycarbonate within a range not to impair the object of the present invention. By applying the specific compounding agent, it is possible to obtain the durability of the resin composition, particularly the effect of maintaining the durability for a long time under severe temperature and humidity conditions, and the antistatic property. Digital versatile discs (DVD-ROMs) such as compact discs (CD), CD-ROMs, CD-Rs, CD-RWs, magnet optical discs (MO), etc. obtained using the copolymerized polycarbonate and the resin composition , DVD-Vi
deo, DVD-Audio, DVD-R, DVD-R
A substrate for a high-density optical disk typified by AM or the like has high reliability over a long period of time. In particular, it is useful for a high-density optical disk such as a digital versatile disk.

The sheet made of the copolymerized polycarbonate and the resin composition produced according to the present invention is a sheet excellent in adhesiveness and printability in addition to flame retardancy and antistatic properties. Widely used for building material parts, automobile parts, etc., specifically, various window materials, such as general houses, gymnasiums,
Baseball dome, vehicle (construction machinery, car, bus, bullet train,
Glazing products for window materials, such as train cars, etc., as well as various side walls (sky dome, top light, arcade, apartment lumbar, road side walls), window materials for vehicles, etc., display and touch panels for OA equipment, membrane switches ,
It is useful for optical applications such as photo covers, polycarbonate resin laminates for aquariums, front panels of projection televisions and plasma displays, liquid crystal cells in combination with Fresnel lenses, optical cards, optical discs and polarizing plates, and phase difference correction plates. . The thickness of the sheet is not particularly limited, but is usually 0.1 to 10 mm, preferably 0.2 to 8
mm and 0.2 to 3 mm are particularly preferred. In addition, various types of processing to add a new function to the sheet (various lamination processing to improve weather resistance, abrasion resistance improvement processing to improve surface hardness, surface graining, semi- and opaque processing, etc.) ) May be applied.

[0081]

EXAMPLES (Analysis) 1) Intrinsic viscosity [η] of polycarbonate: measured in methylene chloride at 20 ° C. using an Ubbelohde viscosity tube. The viscosity average molecular weight was calculated from the intrinsic viscosity by the following formula (3). [Η] = 1.23 × 10 ⁻⁴ Mw ^0.83 (3)

2) Melt viscosity stability: Using a rheometrics RAA-type flow analyzer under a nitrogen stream at a shear rate of 1
rad / sec. The absolute value of the change in melt viscosity measured at 300 ° C. was measured for 30 minutes, and the rate of change per minute was determined.
This value must not exceed 0.5% for good short- and long-term stability of the polycarbonate resin composition.

3) Ultraviolet ray cut effect: A 70 × 50 × 2 mm color sample plate molded by an injection molding machine at a cylinder temperature of 300 ° C. and a mold temperature of 80 ° C. was subjected to Hitachi spectrophotometer;
Spectral light transmittance at UV-3600, UV wavelength 38
It was measured at 0 nm and 700 nm in the visible part.
Those having a spectral light transmittance of 0% at a wavelength of 380 nm and a spectral light transmittance of 85% at 700 nm in the visible region were determined as an OK level that cuts ultraviolet light and transmits visible light.

4) Volatility of ultraviolet absorber; when molding a color sample plate using an injection molding machine at a cylinder temperature of 300 ° C. and a mold temperature of 80 ° C., extruding the resin from the extruder tip prior to molding, The presence or absence of smoke from the nozzle tip was visually determined. The level where smoke is not recognized is O
It was determined to be K.

5) Molding heat resistance; Yellowness Y of the above color sample board
Let I value be the heat resistance parameter at the time of heat molding of the agent,
An I value ≦ 2 or less was regarded as an OK level.

6) Light fastness test: An I-Super UV tester manufactured by Iwasaki Electric Co., Ltd. using an injection molding machine at a cylinder temperature of 300 ° C. and a mold temperature of 80 ° C.
The SUV-F11 was irradiated with light in the ultraviolet / visible range of 295-450 nm at an intensity of 100 mW / cm ² for 40 hours, and the change in yellowness (ΔYI value) was determined with a color difference meter. Color difference meter: Z-1001DP color difference meter manufactured by Nippon Denshoku Co., Ltd.

(Production Example of Copolymerized Polycarbonate) [Example 1] Production of aromatic polycarbonate was carried out as follows. In a reaction vessel equipped with a stirrer, a rectification column and a decompression device, 137 parts by weight of purified BPA, 133 parts by weight of purified DPC, and bis (2,4) as an O, O'-dihydroxybenzophenone-based compound were used as raw materials. −
Dihydroxyphenyl) ketone was converted to 1.48 (1 mol%
(Dihydroxy compound), 4.1 × 10 ⁻⁵ parts by weight of bisphenol disodium salt as a polymerization catalyst, and 5 × 10 ⁻³ parts by weight of tetramethylammonium hydroxide were melted at 180 ° C. under a nitrogen atmosphere.

Under stirring, the inside of the reaction tank was set at 13.33 kPa (1
The pressure was reduced to 00 mmHg), and the reaction was carried out for 20 minutes while the generated phenol was distilled off. Next, after the temperature was raised to 200 ° C., the pressure was gradually reduced to 4.00 while phenol was distilled off.
The reaction was performed at 0 kPa (30 mmHg) for 20 minutes. Further, the temperature was gradually raised and reacted at 220 ° C. for 20 minutes, 240 ° C. for 20 minutes, and 260 ° C. for 20 minutes. Thereafter, the pressure was gradually reduced at 260 ° C. and 10 minutes at 2.666 kPa (20 mmHg).
The reaction was continued at 1.333 kPa (10 mmHg) for 5 minutes, and finally 260 ° C./66.7 Pa (0.5 m
(mHg) until the intrinsic viscosity reached 0.45 dl / g. Finally, the intrinsic viscosity was 0.45 dl / g and the melt viscosity stability was 1.1% (hereinafter referred to as PC-1). The physical properties of the obtained polycarbonate are described in Table 1.

Example 2 After melt polymerization in Example 1, dodecylbenzenesulfonic acid tetrabutylphosphonium salt (hereinafter abbreviated as DBSP in the table) 3.6 × 10
^-4 parts by weight, 260 ° C., 66.7 Pa (0.5 mm
Hg) for 10 minutes. The intrinsic viscosity of the obtained polycarbonate was 0.45 dl / g, and the melt viscosity stability was 0% (hereinafter referred to as PC-2). The physical properties of the obtained polycarbonate are described in Table 1.

[Comparative Examples 1 and 2] In Example 1, no bis (2,4-dihydroxyphenyl) ketone was used (Comparative Example 1), or 10.33 (7 mol% -dihydroxy compound) parts by weight were added. (Comparative Example 2) Melt polymerization was performed. After the melt polymerization, 3.6 × 10 ^-4 parts by weight of tetradecylphosphonium dodecylbenzenesulfonate (hereinafter abbreviated as DBSP in the table) is added, and 260 ° C., 66.
The mixture was stirred at 7 Pa (0.5 mmHg) for 10 minutes. The physical properties of the obtained polycarbonate are described in Table 1. The polycarbonate of Comparative Example 2 contained a large amount of a rubbery gel and was unsuitable for molding.

Example 3 In the same manner as in Example 1, except that bis (2,4-dihydroxyphenyl) ketone was used at 24.6.
(10 mol% -dihydroxy compound) parts by weight, purified DP
The polymerization was carried out using 170 parts by weight of C and the limiting viscosity was 0.1%.
A low molecular weight polycarbonate of 13 dl / g was obtained. Then, 3.6 × 10 ^-4 parts by weight of DBSP was added. The intrinsic viscosity of the finally obtained polycarbonate is 0.13 dl
/ g, and the melt viscosity stability was 0% (hereinafter referred to as PC-3). The physical properties of the obtained polycarbonate are described in Table 1.

Example 4 Example of Interfacial Polymerization In a reactor equipped with a thermometer, a stirrer, and a dropping funnel, 203.8 parts by weight of ion-exchanged water and 26 parts by weight of a 48% aqueous sodium hydroxide solution were charged, and 23.5 parts by weight of bisphenol A was added. Parts, bis (2,4-dihydroxyphenyl) ketone, 0.25 (1 mol% -dihydroxy compound) parts by weight, and methylene chloride 143.5 parts by weight in which 0.05 parts by weight of hydrosulfite were dissolved. At ~ 25 ° C, 13.5 parts by weight of phosgene was blown in over 60 minutes. After the injection of phosgene was completed, 0.30 parts by weight of pt-butylphenol was added, and 8.7 parts by weight of a 48% aqueous sodium hydroxide solution was further added and emulsified. Then, the mixture was allowed to stand at 28 to 33 ° C. for about 3 hours.
The reaction was terminated. After completion of the reaction, the product was diluted with methylene chloride, washed with water, acidified with hydrochloric acid, and continuously washed with water. When the conductivity of the aqueous phase became almost the same as ion-exchanged water, methylene chloride was evaporated to give 26.5 weight of a colorless polycarbonate. Got a part. The limiting viscosity of this polycarbonate is 0.4
1 dl / g and melt viscosity stability was 0.1% (hereinafter P
C-4. ). The physical properties of the obtained polycarbonate are described in Table 1.

[Examples 5 to 8] Aromatic phosphite-based compounds, phenolic compounds, fatty acid partial esters of polyhydric alcohols, and bluish coloring were added to the aromatic polycarbonates of the above examples in the types and amounts shown in the table. The agent was added. Next, the composition was subjected to a vent-type twin-screw extruder [K-Steel Co., Ltd.
TX-46], and melt-kneaded while degassing at a cylinder temperature of 240 ° C to obtain pellets. The stability evaluation using the composition is shown in the table.

[Examples 9 and 10 and Comparative Examples 3 and 4] In the Panlite L1250 manufactured by Teijin Chemicals Limited, the polycarbonates of Example 3 described in the table, (Examples 9 and 10), or commercially available ultraviolet rays were used. An absorbent (Comparative Examples 3 and 4), an aromatic phosphite compound, a phenol compound, a fatty acid partial ester of polyhydric alcohol and a bluish colorant were added, and a vented twin-screw extruder [manufactured by Kobe Steel Ltd.] KTX-46], melt-kneading while degassing at a cylinder temperature of 240 ° C,
A pellet was obtained. The stability evaluation using the composition is shown in Table 1.

[0095]

[Table 1]

(Evaluation Example of Sheet) Example 11 After the polycarbonate composition of Example 9 was melted, it was supplied in a fixed amount by a gear pump and sent to a T-die of a molding machine. The sheet was melt-extruded into a sheet having a thickness of 0.2 mm and a width of 800 mm by sandwiching the mirror surface cooling roll and the mirror surface roll or touching one surface. The obtained polycarbonate sheet was mixed with an ink [Natsuda 70-9132: color 136D smoke] and a solvent [isophorone / cyclohexane / isobutanol = 40/40/20 (wt%)] to make the polycarbonate sheet uniform, and the mixture was mixed with a silk screen printing machine. After printing, 10
Dry at 0 ° C. for 60 minutes. There was no transfer failure on the printed ink surface and the printing was good.

Separately, a polycarbonate resin obtained by subjecting 1,1-bis (4-hydroxyphenyl) cyclohexane and phosgene to an ordinary interfacial polycondensation reaction (specific viscosity of 0.1%).
895, Tg 175 ° C) 30 parts, Plast as a dye
A sheet (0.2 mm thick) printed with a printing ink obtained by mixing 15 parts of Red 8370 (manufactured by Arimoto Chemical Industries) and 130 parts of dioxane as a solvent was mounted in an injection molding die, and polycarbonate resin pellets (panlite) were mounted. L-
1225; manufactured by Teijin Chemicals Ltd.) at 310 ° C. molding temperature. An insert-molded product having a good printed-part appearance without abnormalities such as bleeding or blurring in the printed-part pattern of the molded product after insert molding was obtained.

(Evaluation Examples of Polymer Blend Compound [Resin Composition]) [Examples 12 to 18] 0.05% of trimethyl phosphate was added to the aromatic polycarbonate of Example 10 above.
% By weight and the components indicated by the following symbols in Tables 3 and 4 were uniformly mixed using a tumbler.
Twin screw extruder with mmφ vent (KTX manufactured by Kobe Steel Ltd.)
-30), the cylinder temperature was 260 ° C and 1.33k
After degassing at a degree of vacuum of Pa (10 mmHg) and pelletizing, the obtained pellets were dried at 120 ° C. for 5 hours, and then the cylinder temperature was measured using an injection molding machine (Model SG150U manufactured by Sumitomo Heavy Industries, Ltd.). A molded piece for measurement was prepared under the conditions of 270 ° C. and a mold temperature of 80 ° C., and the results of the following evaluations are shown in the table. -1 ABS: styrene-butadiene-acrylonitrile copolymer; Santac UT-61; Mitsui Chemicals, Inc.
-2 AS: styrene-acrylonitrile copolymer;
Styrac-AS 767 R27; manufactured by Asahi Kasei Corporation-3 PET: polyethylene terephthalate; TR-
8580; Teijin Limited, intrinsic viscosity 0.8-4 PBT: polybutylene terephthalate; TRB
-H; Teijin Limited, intrinsic viscosity 1.07 -1 MBS: Methyl (meth) acrylate-butadiene-styrene copolymer; Kaneace B-56; Butadiene-alkyl acrylate-
Alkyl methacrylate copolymer; Paraloid EXL
-3E-2: Composite rubber having a polyorganosiloxane component and a polyalkyl (meth) acrylate rubber component having an interpenetrating network structure; Metablen S-2001;
Mitsubishi Rayon Co., Ltd. -1 T: Talc; HS-T0.8; Hayashi Kasei Co., Ltd.
, Average particle diameter L = 5 measured by laser diffraction method
μm, L / D = 8 −2 G: glass fiber; chopped strand ECS
-03T-511; manufactured by Nippon Electric Glass Co., Ltd., urethane convergence treatment, fiber diameter 13 μm −3 W: wollastonite;
Tomoe Kogyo Co., Ltd., number-average average fiber diameter D = 1.5 μm, average fiber length 17 μm determined by electron microscope observation,
Aspect ratio L / D = 20 WAX: Olefin wax obtained by copolymerization of α-olefin and maleic anhydride; DIAKARNA-P3
0; manufactured by Mitsubishi Chemical Corporation (maleic anhydride content = 10w)
t%)

(Measurement of Physical Properties of Compound) (A) Flexural Modulus The flexural modulus was measured according to ASTM D790. (B) Notched impact value According to ASTM D256, a 3.2 mm thick test piece was used to impact a weight from the notch side, and the impact value was measured. (C) Fluidity Cylinder temperature 250 ° C, mold temperature 80 ° C, injection pressure 9
The fluidity was measured at 8.1 MPa by Archimedes-type spiral flow (thickness 2 mm, width 8 mm). (D) Chemical Resistance A 1% strain was applied to a tensile test piece used according to ASTM D638, and the test piece was immersed in Esso regular gasoline at 30 ° C. for 3 minutes, and then the tensile strength was measured to calculate the retention.
The retention was calculated by the following equation. Retention (%) = (strength of treated sample / strength of untreated sample) × 100

[0100]

[Table 2]

[0101]

[Table 3]

[0102]

As described in the present invention, the polycarbonate obtained by copolymerizing the O, O'-dihydroxybenzophenone compound has an excellent ultraviolet ray cutting effect, heat stability and good bleed-out characteristics. Furthermore, high concentration O, O'-
The dihydroxybenzophenone compound copolymerized low molecular weight polycarbonate is also effective as an ultraviolet absorber in a composition with another thermoplastic resin.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Kageyama 2-1 Hinode-cho, Iwakuni-shi, Yamaguchi Prefecture Teijin Co., Ltd. Inside the Iwakuni Research Center (72) Inventor Katsuji Sasaki 2-1 Hinode-cho, Iwakuni-shi, Yamaguchi Prefecture Teijin Shares Iwakuni Research Center F term (reference) 4J002 BB02X BB11X BC02X BC06X BG05X BN15X CC03X CD00X CF06X CF07X CF16X CG01W CG02W CH07X CK02X CL00X CM04X CN01X CN03X FD030 FD050 FD100 A03 012 BB13B HC01 HC02 HC03 HC04A HC04C HC05A HC05B

Claims (4)

[Claims] The main repeating unit is represented by the following formula (1): [R ¹ , R ² , R ³ , and R ⁴ are each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms, or an aryl group having 6 to 10 carbon atoms, and W is alkylidene. Group, alkylene group, cycloalkylidene group, cycloalkylene group, phenyl group-substituted alkylene group, oxygen atom, sulfur atom, sulfoxide group, or sulfone group. In the polycarbonate represented by the following formula (2): [Wherein R ⁵ and R ⁶ each independently represent a hydrogen atom, a carbon number of 1 to 1;
Represents an alkyl group of 0. ], The copolymerization amount of the O, O'-dihydroxybenzophenone-based compound is 0.01 to 5 mol% per 1 mol of the dihydroxy compound as a polymerization raw material, and the intrinsic viscosity is 0.2 to 2.0. 0 dl / g copolymerized polycarbonate. 2. In a polycarbonate whose main repeating unit is represented by the above formula (1), the copolymerization amount of the O, O′-dihydroxybenzophenone compound represented by the above formula (2) is a polymerization raw material. It is 0.1 to 20 mol% per 1 mol of the dihydroxy compound, and the intrinsic viscosity is 0.1 mol%.
A copolymerized polycarbonate having a molecular weight of from 0.5 to less than 0.2 dl / g. 3. A melt polymerization of a dihydroxy compound, an O, O′-dihydroxybenzophenone compound represented by the formula (2), and a carbonate bond-forming precursor in the presence of a transesterification catalyst. A method for producing the copolymerized polycarbonate according to claim 1. 4. A resin composition using the copolymerized polycarbonate according to claim 2 and a thermoplastic resin.