JP5623687B2 - Molded product formed by melt-molding copolymer polycarbonate resin - Google Patents

Description

The present invention relates to a molded article formed by melt-molding a novel copolymer polycarbonate resin. More specifically, it is a copolymer polycarbonate resin that contains a portion that can be derived from a carbohydrate that is a renewable resource and has excellent heat resistance, thermal stability, and moldability, and is useful as a material for various molding materials and polymer alloy materials. The present invention relates to a molded product formed by melt molding a copolymer polycarbonate resin.

  The polycarbonate resin is a polymer in which an aromatic or aliphatic dioxy compound is linked by a carbonic acid ester, and among them, a polycarbonate resin (hereinafter referred to as “PC”) obtained from 2,2-bis (4-hydroxyphenyl) propane (commonly called bisphenol A). -A ") is used in many fields because it has excellent transparency, heat resistance, and mechanical properties such as impact resistance.

  Polycarbonate is generally produced using raw materials obtained from petroleum resources. However, there is a concern about the exhaustion of petroleum resources, and there is a demand for production of polycarbonate using raw materials obtained from renewable resources such as plants. . As a biomass material using a renewable resource as a raw material, polycarbonate using a raw material obtained from an ether diol residue that can be produced from a saccharide, in addition to a polylactic acid resin, has been studied.

  For example, the ether diol shown in the following formula (a) is easily made from renewable resources such as sugars and starch, and three stereoisomers are known. Specifically, the following formula (b 1,4: 3,6-dianhydro-D-sorbitol (hereinafter referred to as “isosorbide”), 1,4: 3,6-dianhydro-D represented by the following formula (c) -Mannitol (hereinafter referred to as "isomannide"), 1,4: 3,6-dianhydro-L-iditol (hereinafter referred to as "isoidid") represented by the following formula (d) It is.

  Isosorbide, isomannide, and isoidide are obtained from D-glucose, D-mannose, and L-idose, respectively. For example, isosorbide can be obtained by hydrogenating D-glucose and then dehydrating it using an acid catalyst.

  So far, among the above ether diols, in particular, it has been studied to incorporate isosorbide as a monomer mainly in polycarbonate (for example, Patent Documents 1 and 2 and Non-Patent Documents 1 to 3). However, homopolycarbonate from isosorbide has a problem that it has a very high melt viscosity due to its rigid structure and is difficult to mold. Copolymerization with various bishydroxy compounds has been reported in order to solve this problem, but in the case of copolymerized polycarbonates of isosorbide and aromatic bisphenols (for example, Patent Document 3, Non-Patent Documents 4 to 6) Since the group bisphenols themselves have a relatively rigid structure, the contribution to the reduction of melt viscosity is low, and these raw materials have a problem that they are derived from petroleum. Further, a copolymer polycarbonate of isosorbide and aliphatic diol is a copolymer of an aliphatic diol such as 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol and isosorbide. Polymerized polycarbonate has been reported (for example, Non-Patent Documents 7 to 8). These polycarbonates are block copolymers or random copolymers, and the glass transition point decreases as the fatty chain becomes longer, respectively, 65 ° C or 59 ° C, 26 ° C or 20 ° C, 12 ° C or 23 ° C, -1 ° C. Alternatively, it has been observed that the temperature is 7 ° C., and the heat resistance is poor.

  Patent Document 4 describes a thermoplastic molding material containing a polycarbonate compound obtained from isosorbide. However, even if the glass transition temperature is sufficiently higher than room temperature, further improvement in heat resistance is required.

  On the other hand, Patent Document 5 reports the copolymerization of an ether diol and an aliphatic diol represented by the above formula (a), has a melt viscosity that is relatively easy to mold, and has heat resistance as a molding material. A new polycarbonate resin that is sufficient is reported.

  However, since the boiling point of the aliphatic diol is low, when polymerizing at a high temperature under reduced pressure, the unreacted aliphatic diol is distilled off from the reaction system and the composition ratio of the resulting polymer deviates from the charged ratio Problems arise. Also, thermal stability may not be sufficient by copolymerizing with such a low-boiling point aliphatic diol.

  Further, Patent Document 6 describes copolymerization of a high-boiling diol having a specific structure and isosorbide. Although the glass transition temperature is 100 ° C. or higher, further improvement in heat resistance is required.

German Patent Application Publication No. 2938464 International Publication No. 2007/013463 Pamphlet JP-A 56-110723 JP 2003-292603 A International Publication No. 2004/111106 Pamphlet JP 2006-232897 A "Journal Fuel Praktische Chemie", 1992, 334, p. 298-310 “Macromolecules”, 1996, Vol. 29, p. 8077-8082 “Journal of Applied Polymer Science”, 2002, Vol. 86, p. 872-880 “Macromolecular Chemistry and Physics” 1997, 198, p. 2197-2210 “Journal of Polymer Science: Part A”, 1997, Vol. 35, p. 1611-1619 “Journal of Polymer Science: Part A”, 1999, vol. 37, p. 1125 to 1133 Okada et al., Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research (B) “Environmentally low load polymer” Construction of sustainable material system based on production of environmentally low load plastic from renewable resources Shu, 2002, p. 26-29 “Journal of Polymer Science: Part A”, 2003, 41, p. 2312-2321

An object of the present invention is to solve the above-mentioned problems and to provide a molded product formed by melt-molding a polycarbonate resin made from a renewable resource excellent in heat resistance, thermal stability and molding processability. .

で表されるエーテルジオールと脂肪族ジオールとの共重合において、用いる脂肪族ジオールの沸点が特定の温度以上の場合に、得られる共重合ポリカーボネート樹脂が、耐熱性、熱安定性および成形加工性に優れたものとなることを見出し、本発明に至った。 As a result of intensive studies to achieve the above object, the present inventor has found that the following formula (a)

In the copolymerization of an ether diol and an aliphatic diol represented by the formula, when the boiling point of the aliphatic diol used is a specific temperature or higher, the resulting copolymer polycarbonate resin is excellent in heat resistance, thermal stability and molding processability. The inventors have found that the present invention is excellent and have arrived at the present invention.

（上記式（Ａ）中、Ｒ _１ およびＲ _２ は同一または異なり、水素原子またはメチル基である）
２．共重合ポリカーボネート樹脂は、前記式（１）のカーボネート構成単位及び３，９−ビス（２−ヒドロキシー１，１−ジメチルエチル）−２，４，８，１０−テトラオキサスピロ（５，５）ウンデカンから誘導されるカーボネート構成単位のみからなる共重合ポリカーボネート樹脂である前項１記載の成形品、
３．共重合ポリカーボネート樹脂のガラス転移温度が１２０〜１７０℃である前項１記載の成形品、
４．共重合ポリカーボネート樹脂は、樹脂０．７ｇを塩化メチレン１００ｍｌに溶解した溶液の２０℃における比粘度が０．１８〜０．６５である前項１記載の成形品、
５．共重合ポリカーボネート樹脂は、前記式（１）で表されるカーボネート構成単位がイソソルビド（１，４：３，６−ジアンヒドロ−Ｄ−ソルビトール）由来のカーボネート構成単位である前項１記載の成形品、
６．共重合ポリカーボネート樹脂は、重合触媒として含窒素塩基性化合物、アルカリ金属化合物およびアルカリ土類金属化合物からなる群より選ばれた少なくとも一つの化合物を使用し、下記式（ａ）で表されるエーテルジオール、４×１０^−３ＭＰａの減圧下で沸点が１８０℃以上の脂肪族ジオールである３，９−ビス（２−ヒドロキシー１，１−ジメチルエチル）−２，４，８，１０−テトラオキサスピロ（５，５）ウンデカンおよび炭酸ジエステルを、常圧で加熱反応させ、次いで減圧下、１８０〜２８０℃の温度で加熱しながら溶融重縮合させた共重合ポリカーボネート樹脂である前項１記載の成形品、および

７．前項１記載の共重合ポリカーボネート樹脂を金型温度７０〜９０℃、成形温度２２０〜２６０℃で溶融成形して成形品を形成する前項１記載の成形品の製造方法、
が提供される。 That is, according to the present invention,
1. 3,9-bis (2-hydroxy-1,1-dimethylethyl) which is an aliphatic diol having a boiling point of 180 ° C. or higher under reduced pressure of 4 × 10 ⁻³ MPa and a carbonate structural unit represented by the following formula (1) -Copolymer polycarbonate resin containing a carbonate structural unit derived from 2,4,8,10-tetraoxaspiro (5,5) undecane (however, it does not include a structural unit of the following formula (A)). Further, the polycarbonate structural unit of the formula (1) is formed by melt-molding a copolymer polycarbonate resin having a carbonate temperature of 50 to 99 mol% in the total carbonate structural unit at a mold temperature of 70 to 90 ° C. and a molding temperature of 220 to 260 ° C. Optical sheets, optical disks, information disks, optical lenses, prisms, mechanical parts, building materials, automobile parts, resin trays or molded articles that are tableware,

(In the above formula (A), R ₁ and R ₂ are the same or different and are a hydrogen atom or a methyl group)
2. The copolymer polycarbonate resin comprises a carbonate structural unit of the above formula (1) and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5,5) undecane. The molded article according to item 1 above, which is a copolymer polycarbonate resin consisting only of carbonate structural units derived from
3. The molded article according to item 1, wherein the glass transition temperature of the copolymer polycarbonate resin is 120 to 170 ° C.
4). The copolymerized polycarbonate resin has a specific viscosity at 20 ° C. of a solution prepared by dissolving 0.7 g of resin in 100 ml of methylene chloride at 0.18 to 0.65,
5. The copolymerized polycarbonate resin is a molded article according to item 1, wherein the carbonate constituent unit represented by the formula (1) is a carbonate constituent unit derived from isosorbide (1,4: 3,6-dianhydro-D-sorbitol).
6). The copolymer polycarbonate resin uses at least one compound selected from the group consisting of a nitrogen-containing basic compound, an alkali metal compound and an alkaline earth metal compound as a polymerization catalyst, and is an ether diol represented by the following formula (a): 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro is an aliphatic diol having a boiling point of 180 ° C. or higher under a reduced pressure of 4 × 10 ⁻³ MPa. (5, 5) The molded article according to item 1, which is a copolymerized polycarbonate resin obtained by heat-reacting undecane and carbonic acid diester at normal pressure and then melt polycondensation while heating at a temperature of 180 to 280 ° C under reduced pressure. and

7). The method for producing a molded product according to the preceding item 1, wherein the copolymer polycarbonate resin according to the previous item 1 is melt-molded at a mold temperature of 70 to 90 ° C and a molding temperature of 220 to 260 ° C to form a molded product,
Is provided.

Hereinafter, the present invention will be described in detail.
In the copolymer polycarbonate resin of the present invention, the lower limit of the specific viscosity at 20 ° C. of a solution obtained by dissolving 0.7 g of resin in 100 ml of methylene chloride is preferably 0.18 or more, more preferably 0.20 or more, The upper limit is preferably 0.22 or more, and the upper limit is preferably 0.65 or less, more preferably 0.55 or less, and still more preferably 0.45 or less. When the specific viscosity is lower than 0.18, it becomes difficult to give the molded product obtained from the copolymer polycarbonate resin of the present invention sufficient mechanical strength. On the other hand, when the specific viscosity is higher than 0.65, the melt fluidity becomes too high, and the melting temperature having the fluidity necessary for molding becomes higher than the decomposition temperature. The copolymer polycarbonate resin of the present invention has a melt viscosity measured with a capillary rheometer at 250 ° C. in the range of 0.2 × 10 ^{3 to} 5.0 × 10 ³ Pa · s under the condition of a shear rate of 600 sec−1. Preferably in the range of 0.4 × 10 ^{3 to} 5.0 × 10 ³ Pa · s, more preferably in the range of 0.4 × 10 ^{3 to} 3.0 × 10 ³ Pa · s. More preferably it is. When the melt viscosity is within this range, the mechanical strength is excellent, and when molding using the copolymer polycarbonate resin of the present invention, there is no generation of silver during molding, which is good.

  The lower limit of the glass transition temperature (Tg) of the copolymeric polycarbonate resin of the present invention is preferably 120 ° C or higher, more preferably 130 ° C or higher, and the upper limit is preferably 170 ° C or lower, more preferably. It is 165 degrees C or less. When Tg is less than 120 ° C., the heat resistance is poor, and when it exceeds 170 ° C., the melt fluidity at the time of molding using the copolymer polycarbonate resin of the present invention is poor. Tg is measured by DSC (model DSC2910) manufactured by TA Instruments.

  In the copolymeric polycarbonate resin of the present invention, the lower limit of the 5% weight loss temperature is preferably 300 ° C or higher, more preferably 310 ° C or higher, still more preferably 330 ° C or higher, and the upper limit is preferable. Is 500 ° C. or lower, more preferably 450 ° C. or lower, and still more preferably 400 ° C. or lower. It is preferable that the 5% weight loss temperature is within the above range since there is almost no decomposition of the resin when molding using the copolymer polycarbonate resin of the present invention. The 5% weight loss temperature is measured by TA Instruments TGA (model TGA2950).

The copolymer polycarbonate resin of the present invention is produced by melt polymerization from an ether diol represented by the above formula (a), an aliphatic diol having a boiling point of 180 ° C. or higher and a carbonic diester under a reduced pressure of 4 × 10 ⁻³ MPa. be able to. Specific examples of the ether diol include isosorbide, isomannide, and isoidide represented by the following formulas (b), (c), and (d).

  These saccharide-derived ether diols are substances obtained from natural biomass and are one of so-called renewable resources. Isosorbide is obtained by hydrogenating D-glucose obtained from starch and then dehydrating it. Other ether diols can be obtained by the same reaction except for the starting materials.

  In particular, a copolymer polycarbonate resin in which the carbonate constituent unit includes a carbonate constituent unit derived from isosorbide (1,4: 3,6-dianhydro-D-sorbitol) is preferable. Isosorbide is an ether diol that can be easily made from starch, and can be obtained in abundant resources, and is superior in all ease of manufacture, properties, and versatility of use compared to isomannide and isoidide. .

The aliphatic diol used in the production of the copolymer polycarbonate resin of the present invention preferably has a boiling point of 180 ° C. or higher and more preferably 190 ° C. or higher under a reduced pressure of 4 × 10 ⁻³ MPa. The upper limit is not particularly limited, but 500 ° C. or less is sufficient. When the boiling point of the aliphatic diol is equal to or higher than the lower limit, there is a problem that the composition ratio of the polymer obtained by distilling off from the reaction system when polymerizing the copolymer polycarbonate resin deviates from the charged ratio. The copolymer polycarbonate resin obtained is preferable because it is excellent in heat resistance, thermal stability and molding processability. Such aliphatic diols include 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5,5) undecane << 221 ° C >> . In addition, the temperature of << >> in the above example is a boiling point at 4 × 10 ⁻³ MPa.

  The copolymerization ratio of the copolymerized polycarbonate resin of the present invention is preferably 99/1 to 50/50 in terms of the carbonate structural unit (molar ratio) derived from the carbonate structural unit of formula (1) / aliphatic diol, More preferably, it is 99 / 1-85 / 15, More preferably, it is 95 / 5-85 / 15. When the proportion of the carbonate constituent unit of the formula (1) is greater than 99, the effect of decreasing the melt viscosity due to the carbonate constituent unit derived from the aliphatic diol is not observed, which is not preferable. Further, when the proportion of the carbonate structural unit of the formula (1) is less than 50, the moldability is improved but the heat resistance is lowered, and the original purpose is to use a raw material obtained from renewable resources such as plants. It is difficult to satisfy the gist of “polycarbonate”.

  The copolymeric polycarbonate resin of the present invention performs melt polymerization in which ether diol, aliphatic diol and carbonic acid diester are mixed in the presence of a polymerization catalyst, and alcohol or phenol produced by transesterification is distilled under high temperature and reduced pressure. Can be obtained.

  The reaction temperature is preferably as low as possible in order to suppress the decomposition of the ether diol and aliphatic diol and obtain a highly viscous resin with little coloration. It is preferable that it is the range of 180-280 degreeC, More preferably, it is the range of 230 degreeC-270 degreeC.

In the initial stage of the reaction, ether diol, aliphatic diol and carbonic acid diester are heated at normal pressure and pre-reacted, and then the pressure is gradually reduced to 1.3 × 10 ⁻³ to 1.3 in the late stage of the reaction. A method of facilitating the distillation of alcohol or phenol produced by reducing the pressure to about × 10 ⁻⁵ MPa is preferred. The reaction time is usually about 1 to 4 hours.

  A polymerization catalyst can be used to increase the polymerization rate. Examples of the polymerization catalyst include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogencarbonate, alkali metal compounds such as sodium salt or potassium salt of dihydric phenol, calcium hydroxide, barium hydroxide, magnesium hydroxide. And alkaline earth metal compounds such as tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrabutylammonium hydroxide, nitrogen-containing basic compounds such as trimethylamine and triethylamine. These may be used alone or in combination of two or more. Among these, it is preferable to use a nitrogen-containing basic compound and an alkali metal compound in combination.

The amount of these polymerization catalysts used is preferably in the range of 1 × 10 ⁻⁹ to 1 × 10 ⁻³ equivalents, more preferably 1 × 10 ^{−8 to} 5 × 10 ⁻⁴ equivalents, relative to 1 mol of the carbonic acid diester component. Chosen by The reaction system is preferably maintained in an atmosphere of a gas inert to the raw materials such as nitrogen, the reaction mixture, and the reaction product. Examples of inert gases other than nitrogen include argon. Furthermore, you may add additives, such as antioxidant, as needed.

  Examples of the carbonic acid diester used in the production of the copolymer polycarbonate resin of the present invention include an ester such as an optionally substituted aryl group having 6 to 20 carbon atoms, an aralkyl group, or an alkyl group having 1 to 18 carbon atoms. Specific examples include diphenyl carbonate, bis (chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, bis (p-butylphenyl) carbonate, dimethyl carbonate, diethyl carbonate, and dibutyl carbonate. preferable.

  The carbonic acid diester is preferably mixed so that the molar ratio is 1.05 to 0.97, more preferably 1.03 to 0.98, and still more preferably, with respect to the total amount of the ether diol compound and bisphenol. 1.03-0.99. If the molar ratio of the carbonic acid diester is more than 1.05, the carbonic acid ester residue acts as a terminal block and a sufficient degree of polymerization cannot be obtained, which is not preferable. Even when the molar ratio of carbonic acid diester is less than 0.97, a sufficient degree of polymerization cannot be obtained, which is not preferable.

  A catalyst deactivator can also be added to the copolymer polycarbonate resin obtained by the above production method. As the catalyst deactivator, known catalyst deactivators are effectively used. Among them, ammonium salts and phosphonium salts of sulfonic acid are preferable, and further, dodecylbenzenesulfonic acid such as tetrabutylphosphonium salt of dodecylbenzenesulfonic acid is preferable. The salts of paratoluenesulfonic acid such as the above-mentioned salts and paratoluenesulfonic acid tetrabutylammonium salt are preferred. As esters of sulfonic acid, methyl benzenesulfonate, ethyl benzenesulfonate, butyl benzenesulfonate, octyl benzenesulfonate, phenyl benzenesulfonate, methyl paratoluenesulfonate, ethyl paratoluenesulfonate, butyl paratoluenesulfonate, para Octyl toluenesulfonate, phenyl p-toluenesulfonate and the like are preferably used, and among them, tetrabutylphosphonium dodecylbenzenesulfonate is most preferably used. These catalyst deactivators are used in an amount of 0.5 to 50 mol, preferably 0.5 to 10 mol, per mol of the polymerization catalyst selected from alkali metal compounds and / or alkaline earth metal compounds. It can be used in a proportion, more preferably in a proportion of 0.8 to 5 mol.

  In addition, various function-imparting agents may be added to the copolymerized polycarbonate resin of the present invention depending on the application, for example, a heat stabilizer, a stabilizing aid, a plasticizer, an antioxidant, a light stabilizer, an impact. Absorbers, heavy metal deactivators, flame retardants, lubricants, antistatic agents, UV absorbers and the like.

  In addition, the copolymeric polycarbonate resin of the present invention can be used in combination with various organic and inorganic fillers, fibers and the like depending on the application. Examples of the filler include carbon, talc, mica, wollastonite, montmorillonite, and hydrotalcite. Examples of the fibers include natural fibers such as kenaf, various synthetic fibers, glass fibers, quartz fibers, and carbon fibers.

  Further, the copolymer polycarbonate resin of the present invention includes polymers and various biogenic substances such as polylactic acid, aliphatic polyester, aromatic polyester, aromatic polycarbonate, polyamide, polystyrene, polyolefin, polyacryl, ABS, polyurethane, and the like. It can be mixed with a synthetic resin, rubber or the like and alloyed.

  The copolymer polycarbonate resin of the present invention contains a portion derived from a renewable resource, has both good heat resistance and thermal stability, and is excellent in molding processability. Therefore, the optical sheet, optical disk, information It can be widely used in various applications including optical parts such as disks, optical lenses, and prisms, various machine parts, building materials, automobile parts, various resin trays, and tableware.

  In addition, since the copolymeric polycarbonate resin of the present invention is also biodegradable, it includes films and sheets for agricultural materials such as films for houses and films for mulch, food packaging, general packaging, compost bags and the like. It can also be used as a molded product for various uses where reduction of environmental pollution is desired, such as industrial products such as packaging films and sheets, tapes, and various packaging containers.

  The following examples further illustrate the present invention. However, the present invention is not limited to these examples. In addition, the part in an Example is a weight part and% is weight%. The evaluation was based on the following method.

(1) Specific viscosity η _sp
The pellet was dissolved in methylene chloride, the concentration was set to about 0.7 g / dL, and the temperature was measured at 20 ° C. using an Ostwald viscometer (device name: RIGO AUTO VISCOSIMETER TYPE VMR-0525 · PC). In addition, specific viscosity (eta) _sp was calculated | required from the following formula.
η _sp = t / t _o −1
t: Flow time of sample solution t _o : Flow time of solvent only

(2) Glass transition temperature It measured by DS instrument (model DSC2910) by TA Instruments using the pellet.

(3) 5% weight loss temperature It measured by T Instruments (model TGA2950) by TA Instruments using the pellet.

(4) Formability Forming was performed using JSWJ-75EIII manufactured by Nippon Steel Works, Ltd., and the shape of a sample plate having a thickness of 2 mm was visually evaluated (mold temperature: 70 to 90 ° C., molding temperature: 220). ~ 260 ° C). Judgment criteria are as follows.
○: No turbidity, cracks, sink marks, or silver due to decomposition was observed.
X: Silver is observed due to turbidity, cracks, sink marks, or decomposition.

Reference example 1
1447 parts by weight (9.9 moles) of isosorbide, 253 parts by weight (1.1 moles) of 1,14-tetradecanediol, and 2427 parts by weight (11.33 moles) of diphenyl carbonate were placed in a reactor, and tetramethyl as a polymerization catalyst. 2.1 parts by weight of ammonium hydroxide (2 × 10 ⁻⁴ moles per mole of diphenyl carbonate) and 1.1 × 10 ⁻² parts by weight of sodium hydroxide (2.5 parts per mole of diphenyl carbonate) × 10 ⁻⁶ mol) was charged and melted at 180 ° C. in a nitrogen atmosphere. Under stirring, the pressure in the reaction vessel was reduced to 13.3 × 10 ⁻³ MPa, and the reaction was performed for 20 minutes while distilling off the produced phenol. Next, after heating up to 200 degreeC, it pressure-reduced gradually, it was made to react at 4.00 * 10 < ^-3 > MPa for 25 minutes, distilling phenol off, and also it heated up at 220 degreeC and was made to react for 10 minutes. Subsequently, the pressure was gradually reduced, and the reaction was continued at 2.67 × 10 ⁻³ MPa for 10 minutes and 1.33 × 10 ⁻³ MPa for 10 minutes, and further reduced in pressure to reach 4.00 × 10 ⁻⁵ MPa. The temperature was gradually raised to 260 ° C., and the reaction was finally carried out at 260 ° C. and 6.66 × 10 ⁻⁵ MPa for 2 hours. The polymer after the reaction was pelletized. This polymer had a specific viscosity of 0.28, a glass transition temperature of 139 ° C., and a 5% weight loss temperature of 348 ° C. Moreover, when it shape | molded using this polymer, it was a thing with favorable shaping | molding workability.

Reference example 2
Pellets were polymerized in the same manner as in Example 1 except that 965 parts by weight of isosorbide (6.6 moles) and 1,392 parts by weight of 2,2-bis- (4-hydroxycyclohexyl) -propane (4.4 moles) were used. A polymer was obtained. The specific viscosity of this polymer was 0.31, the glass transition temperature was 145 ° C., and the 5% weight loss temperature was 369 ° C. Moreover, when it shape | molded using this polymer, it was a thing with favorable shaping | molding workability.

Reference example 3
Pellets were polymerized in the same manner as in Example 1 except that 804 parts by weight (5.5 mol) of isosorbide and 2412 parts by weight (5.5 mol) of 9,9-bis {(2-hydroxyethoxy) phenyl} fluorene were used. Of polymer was obtained. The specific viscosity of this polymer was 0.29, the glass transition temperature was 157 ° C., and the 5% weight loss temperature was 374 ° C. Moreover, when it shape | molded using this polymer, it was a thing with favorable shaping | molding workability.

Example 1
Isosorbide 1446 parts by weight (10.89 mol) and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5,5) undecane 335 parts by weight (0 .11 mol) except that the polymerization was carried out in the same manner as in Example 1 to obtain a pellet-like polymer. The specific viscosity of this polymer was 0.29, the glass transition temperature was 155 ° C., and the 5% weight loss temperature was 355 ° C. Moreover, when it shape | molded using this polymer, it was a thing with favorable shaping | molding workability.

Comparative Example 1
1590 parts by weight (10.88 moles) of isosorbide and 39 parts by weight (0.26 moles) of p-tert-butylphenol were placed in a thermometer and a reactor equipped with a stirrer, purged with nitrogen, and 5500 parts by weight of pyridine well dried in advance. Then, 32400 parts by weight of methylene chloride was added and dissolved. Under stirring, 1400 parts by weight (14.14 mol) of phosgene was blown in for 100 minutes at 25 ° C. After the completion of phosgene blowing, the reaction was terminated by stirring for about 20 minutes. After completion of the reaction, the product was diluted with methylene chloride, pyridine was neutralized and removed with hydrochloric acid, washed repeatedly until the conductivity was almost the same as that of ion-exchanged water, and then methylene chloride was evaporated to obtain a colorless powder. . This powder was pelletized. The specific viscosity of this polymer was 0.43, the glass transition temperature was 169 ° C., and the 5% weight loss temperature was 360 ° C. Further, when molding was performed using this polymer, the flowability was poor and sink marks and silver were observed in the molded product, and the molding processability was poor.

Comparative Example 2
A polymer was obtained by polymerization in the same manner as in Example 1 except that 1125 parts by weight (7.7 mol) of isosorbide and 251 parts by weight (3.3 mol) of 1,3-propanediol were used. This polymer had a specific viscosity of 0.15, a glass transition temperature of 112 ° C., and a 5% weight loss temperature of 318 ° C. The molar ratio of the diol component was isosorbide / propanediol = 70/30 at the time of charging. When the composition ratio of the polymer was calculated from the integrated value of ¹ HNMR, the composition ratio was 81/19 and deviated from the charging ratio. . Further, the balance between the diol component and the diphenyl carbonate component was lost due to the distillation of the propanediol component, and therefore a polymer having a sufficient specific viscosity (molecular weight) could not be obtained.

Claims (7)

3,9-bis (2-hydroxy-1,1-dimethylethyl) which is an aliphatic diol having a boiling point of 180 ° C. or higher under reduced pressure of 4 × 10 ⁻³ MPa and a carbonate structural unit represented by the following formula (1) -Copolymer polycarbonate resin containing a carbonate structural unit derived from 2,4,8,10-tetraoxaspiro (5,5) undecane (however, it does not include a structural unit of the following formula (A)). Further, the polycarbonate structural unit of the formula (1) is formed by melt-molding a copolymer polycarbonate resin having a carbonate temperature of 50 to 99 mol% in the total carbonate structural unit at a mold temperature of 70 to 90 ° C. and a molding temperature of 220 to 260 ° C. Optical sheets, optical disks, information disks, optical lenses, prisms, machine parts, building materials, automobile parts, resin trays or tableware.

(In the above formula (A), R ₁ and R ₂ are the same or different and are a hydrogen atom or a methyl group) The copolymer polycarbonate resin comprises a carbonate structural unit of the above formula (1) and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5,5) undecane. The molded article according to claim 1, which is a copolymerized polycarbonate resin composed only of a carbonate structural unit derived from .   The molded article according to claim 1, wherein the glass transition temperature of the copolymer polycarbonate resin is 120 to 170 ° C.   2. The molded article according to claim 1, wherein the copolymer polycarbonate resin has a specific viscosity at 20 ° C. of 0.18 to 0.65 in a solution of 0.7 g of resin dissolved in 100 ml of methylene chloride.   2. The molded article according to claim 1, wherein the copolymeric polycarbonate resin is a carbonate constituent unit derived from isosorbide (1,4: 3,6-dianhydro-D-sorbitol). The copolymer polycarbonate resin uses at least one compound selected from the group consisting of a nitrogen-containing basic compound, an alkali metal compound and an alkaline earth metal compound as a polymerization catalyst, and is an ether diol represented by the following formula (a): 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro is an aliphatic diol having a boiling point of 180 ° C. or higher under a reduced pressure of 4 × 10 ⁻³ MPa. (5, 5) The molded article according to claim 1, which is a copolymerized polycarbonate resin obtained by heat-reacting undecane and carbonic acid diester at normal pressure and then melt polycondensation while heating at 180 to 280 ° C under reduced pressure. .

  The method for producing a molded product according to claim 1, wherein the copolymerized polycarbonate resin according to claim 1 is melt-molded at a mold temperature of 70 to 90 ° C and a molding temperature of 220 to 260 ° C to form a molded product.