KR20200105950A - Aromatic polycarbonate resin composition and optical molded article - Google Patents

Abstract

A polycarbonate resin composition containing an aromatic polycarbonate resin (A), a polyether derivative (B), and a specific aromatic compound (C), with respect to 100 parts by weight of the aromatic polycarbonate resin (A), a polyether derivative ( It provides an aromatic polycarbonate resin composition containing 0.1 to 2.0 parts by weight of B) and 0.0001 parts by weight or more and less than 0.05 parts by weight of the aromatic compound (C).

Description

Aromatic polycarbonate resin composition and optical molded article

The present invention relates to an aromatic polycarbonate resin composition and an optical molded article.

Polycarbonate resins are excellent in impact resistance, heat resistance, transparency, and the like, and have been conventionally used in molded articles such as light guide plates, various lenses, and name plates.

For example, Patent Document 1 discloses an aromatic polycarbonate resin composition for a light guide plate in which a stabilizer and a release agent are blended with an aromatic polycarbonate resin having a specific molecular weight and a specific molecular weight distribution.

Patent Document 2 discloses a polycarbonate resin composition for optical molded articles in which a polycarbonate resin is mixed with a specific amount of bead-shaped crosslinked acrylic resin of a specific diameter, and a fluorescent whitening agent is added.

In addition, for example, as disclosed in Patent Documents 3 to 6, various resin compositions in which a polycarbonate resin and other materials are used in combination to obtain excellent light transmittance and improve the luminance of an optical member have been proposed.

Japanese Patent Laid-Open No. 2007-204737 Japanese Patent Application Laid-Open No. Hei 09-020860 Japanese Patent Laid-Open No. 2011-133647 Japanese Patent Laid-Open Publication No. Hei 11-158364 Japanese Patent Laid-Open No. 2001-215336 Japanese Patent Laid-Open No. 2004-051700

However, the polycarbonate resin composition disclosed in Patent Documents 3 to 6 satisfactorily meet the recent demands as a material for a light guide plate (especially, the demand for no decrease in light transmittance even when molding is performed at a high temperature to perform thin-wall molding). Not that you can be satisfied.

Moreover, in recent years, even when a molded product (e.g., a light guide plate) of about 0.3 mm thin shape is exposed over an extremely long period of time under high temperature conditions such as light irradiation, there is little decrease in transparency (cloudiness or coloring Less) material is required.

In the present invention, characteristics such as heat resistance and mechanical strength inherent in the polycarbonate resin are not impaired, excellent thermal stability, high light transmittance, and further, molded thin molded articles of about 0.3 mm (for example, , Light guide plate), even when exposed to a high temperature due to light irradiation or the like over an extremely long period of time, it is an object of the present invention to provide an aromatic polycarbonate resin composition that is unlikely to cause a decrease in transparency (it is difficult to cause cloudiness and coloring).

The inventors of the present invention have conducted extensive research in order to solve such a problem. As a result, an aromatic polycarbonate resin composition containing a predetermined amount of an aromatic polycarbonate resin (A), a polyether derivative (B), and a specific aromatic compound (C), It has excellent thermal stability, high light transmittance, and is molded into a thin molded product (light guide plate) of about 0.3 mm at high temperatures due to light source irradiation, without impairing the properties of polycarbonate resin, such as heat resistance and mechanical strength. Even when exposed over a long period of time under conditions, it was found that the decrease in transparency was small (it is difficult to cause white turbidity or coloring), and the present invention was completed.

That is, the present invention is an aromatic polycarbonate resin composition containing an aromatic polycarbonate resin (A), a polyether derivative (B), and an aromatic compound (C) represented by the following formula, wherein the aromatic polycarbonate resin (A) 100 An aromatic polycarbonate resin composition comprising 0.1 parts by weight or more and 2.0 parts by weight or less of the polyether derivative (B) and 0.0001 parts by weight or more and less than 0.05 parts by weight of the aromatic compound (C), and formed by molding the same Provides optical molded products.

expression:

The polycarbonate resin composition of the present invention does not impair properties such as heat resistance and mechanical strength inherent in the polycarbonate resin, has excellent thermal stability, high light transmittance, and the resulting molded article is salt spring. Even when exposed over a long period of time under high temperature conditions such as under the environment and/or light source irradiation, transparency is less likely to decrease (it is difficult to cause white turbidity or coloration). Therefore, even if it is a thin molded article (light guide plate) having a thickness of about 0.3 mm, it is difficult to cause the appearance to deteriorate (deteriorate) due to a change in color, and transparency even when exposed for a long period under high temperature conditions caused by an external environment or light source. It is difficult to cause deterioration (it is difficult to cause white turbidity or coloring), and the industrial use value is extremely high.

Embodiments will be described in detail below. However, the detailed description may be omitted more than necessary. For example, detailed descriptions of already well-known items or duplicate descriptions of substantially the same configuration may be omitted. This is to avoid unnecessarily redundant and to facilitate understanding of those skilled in the art.

On the other hand, the inventors provide the following description in order for those skilled in the art to fully understand the present invention, and do not intend to limit the subject matter described in the claims by these.

The aromatic polycarbonate resin composition of the embodiment of the present invention contains an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C), and if necessary, a phosphorus antioxidant (D), Epoxy compound (E) and/or other components, etc. can be contained.

In the embodiment of the present invention, the "aromatic polycarbonate resin (A)" is a polycarbonate resin based on an aromatic compound, and if the present invention is particularly limited as long as the target aromatic polycarbonate resin composition can be obtained, none. As such an aromatic polycarbonate resin, for example, a phosgene method in which various dihydroxydiaryl compounds and phosgene are reacted, or an ester in which a dihydroxydiaryl compound and a carbonate ester such as diphenyl carbonate are reacted A polymer obtained by an exchange method can be illustrated. Representative examples include a polycarbonate resin made from 2,2-bis(4-hydroxyphenyl)propane (bisphenol A).

As the dihydroxydiaryl compound, in addition to bisphenol A, for example, bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4- Hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, bis(4-hydroxyphenyl)phenylmethane, 2,2-bis(4-hydroxyphenyl-3-methylphenyl) Propane, 1,1-bis(4-hydroxy-3-tertiary butylphenyl)propane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 2,2-bis( Bis(hydroxyaryl)alkanes such as 4-hydroxy-3,5-dibromophenyl)propane and 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane; Bis(hydroxyaryl)cycloalkanes such as 1,1-bis(4-hydroxyphenyl)cyclopentane and 1,1-bis(4-hydroxyphenyl)cyclohexane; Dihydroxydiaryl ethers such as 4,4'-dihydroxydiphenyl ether and 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether; Dihydroxydiaryl sulfides such as 4,4'-dihydroxydiphenyl sulfide; Dihydroxydiaryl sulfoxides such as 4,4'-dihydroxydiphenyl sulfoxide and 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfoxide; Dihydroxydiaryl sulfones, such as 4,4'-dihydroxydiphenyl sulfone, and 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone, can be illustrated. These can be used alone or in combination. In addition to these, piperazine, dipiperidylhydroquinone, resorcin, 4,4'-dihydroxydiphenyl, and the like may be used in combination.

In addition, the dihydroxydiaryl compound and, for example, trivalent or higher aromatic compounds shown below may be used in combination.

As the trivalent or higher phenolic compound, for example, fluoroglucine, 4,6-dimethyl-2,4,6-tri-(4-hydroxyphenyl)-heptene, 2,4,6-dimethyl -2,4,6-tri-(4-hydroxyphenyl)-heptane, 1,3,5-tri-(4-hydroxyphenyl)-benzol, 1,1,1-tri-(4-hydro Oxyphenyl)-ethane and 2,2-bis-[4,4-(4,4'-dihydroxydiphenyl)-cyclohexyl]-propane and the like can be illustrated.

It is preferable that it is 10000-100000, and, as for the viscosity average molecular weight of the aromatic polycarbonate resin (A), it is more preferable that it is 12000-30000. On the other hand, when preparing such an aromatic polycarbonate resin (A), a molecular weight modifier, a catalyst, etc. may be used as necessary.

In the embodiment of the present invention, the polyether derivative (B) is a derivative of a polyether compound, and is not particularly limited as long as the aromatic polycarbonate resin composition of the present invention can be obtained. Such a polyether derivative includes, as a representative example, a polyether derivative represented by the following formula (1).

Equation (1):

RO-(X-O)m(Y-O)n-R'

(In the formula, R and R'each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X is a straight chain alkylene group or branched alkylene group having 2 to 4 carbon atoms, and Y is a straight chain alkylene group having 2 to 5 carbon atoms. Or a branched alkylene group, X and Y may be the same or different, m and n each independently represent 3 to 60, and m+n represents 6 to 120.)

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (1), it is more preferable that it is 1000-4000.

As the polyether derivative represented by formula (1), a commercial item can be used.

The polyether derivative represented by formula (1) is

The following formula (1-1):

RO-(X-O)m(Y-O)n-R'

(In the formula, R and R'each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a straight chain alkylene group having 2 to 4 carbon atoms, Y represents a branched alkylene group having 2 to 5 carbon atoms, and m And n each independently represents 3 to 60, and m+n represents 8 to 90.)

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (1-1), it is more preferable that it is 1000-4000.

As the polyether derivative represented by the formula (1-1), a commercial item can be used.

The polyether derivative represented by formula (1) is

The following formula (1-2):

RO-(X-O)m(Y-O)n-R'

(In the formula, R and R'each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a linear alkylene group having 2 to 4 carbon atoms, Y represents a linear alkylene group having 2 to 5 carbon atoms, and X And Y may be the same or different, m and n each independently represent 3 to 60, and m+n represents 6 to 100.)

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (1-2), it is more preferable that it is 1000-4000.

As the polyether derivative represented by the formula (1-2), a commercial item can be used.

The polyether derivative represented by formula (1) is

The following formula (1-3):

RO-(X-O)m(Y-O)n-R'

(In the formula, R and R'each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a branched alkylene group having 2 to 4 carbon atoms, Y represents a branched alkylene group having 2 to 5 carbon atoms, and X And Y may be the same or different, m and n each independently represent 3 to 60, and m+n represents 6 to 120.)

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (1-3), it is more preferable that it is 1000-4000.

As for the polyether derivative represented by Formula (1-3), a commercial item can be used.

The polyether derivative represented by formula (1) is a polyether derivative represented by the following formula (2), a polyether derivative represented by formula (3), a polyether derivative represented by formula (4), Polyether derivative represented by formula (5), polyether derivative represented by formula (6), polyether derivative represented by formula (7), polyether derivative represented by formula (8), formula ( It is preferable to include at least one selected from the group containing a polyether derivative represented by 9) and a polyether derivative represented by formula (10).

The polyether derivative represented by formula (1-1) is a polyether derivative represented by the following formula (2), a polyether derivative represented by the formula (3), and a polyether represented by the formula (4). It is preferable to include at least one selected from the group containing derivatives, polyether derivatives represented by formula (5), and polyether derivatives represented by formula (6).

The polyether derivative represented by formula (1-2) includes at least one selected from the group containing a polyether derivative represented by formula (7) and a polyether derivative represented by formula (8). It is desirable to do.

The polyether derivative represented by formula (1-3) includes at least one selected from the group containing a polyether derivative represented by formula (9) and a polyether derivative represented by formula (10). It is desirable to do.

Equation (2):

HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH

(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.)

As the polyether derivative represented by formula (2), a modified glycol containing a tetramethylene glycol unit and a propylene glycol unit is suitable. As such a polyether derivative, a commercial item can be used, for example, Nichiyu Co., Ltd., polyserine DCB-1000 (weight average molecular weight 1000), polyserine DCB-2000 (weight average molecular weight 2000), Polyserine DCB-4000 (weight average molecular weight 4000), etc. can be used.

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (2), it is more preferable that it is 1000-4000.

Equation (3):

HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH ₂ CH ₂ CH(CH ₃ )CH ₂ O)nH

(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.)

As the polyether derivative represented by formula (3), a modified glycol containing a tetramethylene glycol unit and a 2-methyl tetramethylene glycol unit is preferable. As such a polyether derivative, a commercially available product can be used, for example, PTG-L1000 (weight average molecular weight 1000), PTG-L2000 (weight average molecular weight 2000) or PTG- manufactured by Hodogaya Chemical Industries, Ltd. L3000 (weight average molecular weight 3000) or the like can be used.

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (3), it is more preferable that it is 1000-4000.

Equation (4):

HO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH

(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.)

As the polyether derivative represented by formula (4), a modified glycol containing an ethylene glycol unit and a propylene glycol unit is preferable. As such a polyether derivative, a commercial item can be used, for example, Nichiyu Co., Ltd., UniLube 50DE-25 (weight average molecular weight 1750), UniLube 75DE-25 (weight average molecular weight 1400), etc. You can use

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (4), it is more preferable that it is 1000-4000.

Equation (5):

RO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH

(In the formula, R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, and m+n represents 8 to 90.)

As the polyether derivative represented by the formula (5), a modified glycol comprising a tetramethylene glycol unit and a propylene glycol unit, which is a single terminal butyl group or a single terminal stearyl group, is suitable. As such a polyether derivative, a commercial item can be used, and for example, Nichiyu Co., Ltd., polyserine BC-1000 (one terminal butyl group, weight average molecular weight 1000), polyserine SC-1000 (one Terminal stearyl group, weight average molecular weight 1000), etc. can be used.

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (5), it is more preferable that it is 1000-4000.

Equation (6):

RO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH

(In the formula, R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, and m+n represents 8 to 90.)

As the polyether derivative represented by the formula (6), a modified glycol comprising an ethylene glycol unit and a propylene glycol unit, which is a single terminal butyl group or a single terminal stearyl group, is suitable. As such a polyether derivative, a commercial item can be used, for example, Nichiyu Co., Ltd., UniLube 50MB-11 (one terminal butyl group, weight average molecular weight 1000), UniLube 50MB-26 (one Terminal butyl group, weight average molecular weight 2000), UniLube 50MB-72 (one terminal butyl group, weight average molecular weight 3000), UniLube 10MS-250KB (one terminal stearyl group, weight average molecular weight 2000), etc. can be used.

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (6), it is more preferable that it is 1000-4000.

Equation (7):

HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH ₂ CH ₂ O)nH

(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.)

As the polyether derivative represented by formula (7), a modified glycol containing a tetramethylene glycol unit and an ethylene glycol unit is preferable. As such a polyether derivative, a commercial item can be used, and for example, Nichiyu Corporation, polyserine DC3000E (weight average molecular weight 3000), polyserine DC1800E (weight average molecular weight 1800), etc. can be used. .

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (7), it is more preferable that it is 1000-4000.

Equation (8):

HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)pH

(In formula, p represents 6-100.)

As the polyether derivative represented by formula (8), polytetramethylene glycol is preferable. As such polyether derivatives, commercially available products can be used, for example, PTG-650SN (weight average molecular weight 650), PTG-850SN (weight average molecular weight 850), PTG- manufactured by Hodogaya Chemical Industries, Ltd. 1000SN (weight average molecular weight 1000), PTG-1400SN (weight average molecular weight 1400), PTG-2000SN (weight average molecular weight 2000), PTG-2900 (weight average molecular weight 2900), or the like can be used.

The weight average molecular weight of the polyether derivative (polytetramethylene glycol) represented by formula (8) is preferably 500 to 8000, and more preferably 1000 to 4000.

Equation (9):

Formula: HO-(CH(CH ₃ )CH ₂ O)qH

(In the formula, q represents 7 to 120.)

As the polyether derivative represented by formula (9), polypropylene glycol is preferred. As such a polyether derivative, a commercial item can be used, for example, Dow Chemical Polyglycol P2000P (weight average molecular weight 2000), Nichiyu Corporation's product, Uniol D-1000 (weight average molecular weight) 1000), Uniol D-2000 (weight average molecular weight 2000), Uniol D-4000 (weight average molecular weight 4000), etc. can be used.

The weight average molecular weight of the polyether derivative (polypropylene glycol) represented by formula (9) is preferably 500 to 8000, and more preferably 1000 to 4000.

Equation (10):

HO-(CH(C ₂ H ₅ )CH ₂ O)rH

(In formula, r represents 6-100.)

As the polyether derivative represented by formula (10), polybutylene glycol is preferable. As such a polyether derivative, a commercial item can be used, and for example, Nichiyu Co., Ltd. product, Uniol PB-500 (weight average molecular weight 500), Uniol PB-1000 (weight average molecular weight 1000), Uniol PB-2000 (weight average molecular weight 2000), etc. can be used.

The weight average molecular weight of the polyether derivative (polybutylene glycol) represented by formula (10) is preferably 500 to 8000, and more preferably 1000 to 4000.

The polyether derivative represented by the formula (1) generally has high heat resistance, and a molded article obtained by molding an aromatic polycarbonate resin composition containing the polyether derivative at a high temperature has high luminance or light transmittance.

On the other hand, each of the polyether derivatives represented by the above formulas (1) to (10) is, as long as the aromatic polycarbonate resin composition and optical molded article of the present invention are obtained. It may contain repeating units. As such a repeating unit, for example, a repeating unit based on impurities that may be included in the starting material of a polyether derivative, a repeating unit based on an initiator (polymerization initiator) used during polymerization, etc. can be exemplified. .

When a polymerization initiator is used, as a polymerization initiator, the following compound can be illustrated, for example. Hydrogenated bisphenol A, bisphenol A, isosorbide, glycerin, pentaerythritol, sorbitol, glucose, etc. can be illustrated.

As a polyether derivative containing a repeating unit based on such a polymerization initiator, for example, polyserine 60DB-2000H (manufactured by Nichiyu Corporation), which may correspond to the above formula (2), can be exemplified. (See Equation 2-2).

Equation (2-2):

(In the formula, m1+m2 corresponds to m in formula (2), and n1+n2 corresponds to n in formula (2), respectively.)

It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (2-2), it is more preferable that it is 1000-4000.

In addition, since the polyether derivative (B) used in the present invention has adequate lipophilicity, it is also excellent in compatibility with the aromatic polycarbonate resin (A), and thus an aromatic polycarbonate blended with the polyether derivative (B). Transparency can be maintained without reducing the transparency of the molded article obtained from the resin composition. The weight average molecular weight of such a polyether derivative (B) is preferably 500 to 8000, and more preferably 1000 to 4000.

In addition, CPR (unit: dimensionless) of the polyether derivative (B) used in the present invention (Controlled Polymerization Rate: an index indicating the amount of basic substances in the polyether derivative: measured in accordance with JIS K1557-4) It is preferable that it is 2.0 or less, and it is more preferable that it is 1.0 or less. When the CPR is less than 2.0, the polyether derivative (B) has excellent compatibility with polycarbonate resin, suppresses decomposition and deterioration, has excellent storage stability, and adversely affects the color of the resulting polycarbonate resin composition. It is difficult. For example, the CPR of polyserine DCB-2000 corresponding to the polyether derivative (B) represented by the above formula (2) is less than 1.0, and the polyether derivative (B) represented by the above formula (2) ), the CPR of polyserine 60DB-2000H (manufactured by Nichiyu) is less than 1.0, and PTG-1000SN (Hodogaya Chemical) corresponding to the polyether derivative (B) represented by the above formula (8) The CPR of Industrial Co., Ltd. is less than 1.0.

Furthermore, the pH of the polyether derivative (B) used in the present invention (measured in accordance with JIS K1557-5) is preferably 5.0 or more and less than 7.5, and more preferably 6.0 or more and less than 7.0. When the pH of the polyether derivative (B) is 5.0 or more and less than 7.5, decomposition and deterioration are suppressed, and storage stability is excellent, and it is difficult to adversely affect the color of the resulting polycarbonate resin composition. For example, the pH of polyserine DCB-2000 corresponding to the polyether derivative (B) represented by the above formula (2) is 6.7, and the polyether derivative (B) represented by the above formula (2) The pH of polyserine 60DB-2000H (manufactured by Nichiyu Co., Ltd.) is 6.8, and PTG-1000SN (Hodogaya Chemical Co., Ltd.) corresponding to the polyether derivative (B) represented by the above formula (8) The pH of note) company) is 6.7.

In addition, the temperature at which 90% weight of the polyether derivative (B) used in the present invention (or the temperature at which the weight reduction rate becomes 10%) (measured by thermogravimetric measurement in accordance with JIS K7120) is 300°C or higher. It is preferable, and it is more preferable that it is 330 degreeC or more. When the temperature at which the polyether derivative (B) is 90% by weight is 300° C. or higher, decomposition and deterioration are suppressed, so that storage stability is excellent, and it is difficult to adversely affect the color of the resulting polycarbonate resin composition. For example, the temperature at 90% by weight of polyserine DCB-2000 corresponding to the polyether derivative (B) represented by the above formula (2) is 330°C, and the polyether derivative represented by the above formula (2) The temperature at which 90% weight of polyserine 60DB-2000H (manufactured by Nichiyu Corporation) corresponding to the ether derivative (B) is 400°C.

The amount of the polyether derivative is 0.1 to 2.0 parts by weight, preferably 0.3 to 1.8 parts by weight, based on 100 parts by weight of the aromatic polycarbonate resin (A). When the amount of the polyether derivative is less than 0.1 part by weight, the effect of improving light transmittance and color may be insufficient. Conversely, when the amount of the polyether derivative exceeds 2.0 parts by weight, the thinning rate increases and the light transmittance may decrease.

The aromatic polycarbonate resin composition of the embodiment of the present invention contains an aromatic compound (C) of the following formula as an essential component together with the polyether derivative (B). In this way, by using the polyether derivative (B) and the aromatic compound (C) in combination, while maintaining the excellent optical properties required for the optical molded article, resulting from the use situation of the molded article made of the obtained aromatic polycarbonate resin composition. Deterioration such as deterioration and aging deterioration can be prevented.

For example, thermal deterioration (white turbidity or coloring) due to prolonged light irradiation of an optical molded article molded of an aromatic polycarbonate resin composition with a light source (such as an LED light source) is effectively prevented. In the optical molded article, the temperature of the surface of the molded article may rise under severe conditions such as under salty weather and/or continuous exposure to light for a long period of time, and the aromatic polycarbonate resin (A) contained in the aromatic polycarbonate resin composition Thermal deterioration may progress little by little. In addition, the polyether derivative (B) in the resin composition may be denatured, thereby impairing the transparency (luminance or light transmittance) expected of an aromatic polycarbonate resin composition used in an ordinary optical molded article, thereby making the surface cloudy or Coloration (light coloration to dark coloration) may occur.

In view of this subject, the inventors of the present invention have studied intensively, as a result of the fact that as a compound that inhibits deterioration such as modification of the polyether derivative (B), a specific aromatic compound (C) of the following formula is particularly effective, and a specific aromatic compound ( By adding C) to the polyether derivative (B) in advance, or before melt-kneading to obtain an aromatic polycarbonate resin composition, deterioration of the polyether derivative (B) in the molded article is inhibited, thereby making it cloudy or colored. (Light coloration to dark coloration) The present invention was completed by conceiving that the phenomenon can be reduced or alleviated.

expression:

The amount of the aromatic compound (C) used in the embodiment of the present invention is 0.0001 parts by weight or more and less than 0.05 parts by weight, and preferably 0.0005 parts by weight or more and 0.003 parts by weight or less, based on 100 parts by weight of the aromatic polycarbonate resin (A). . When the amount of the aromatic compound (C) is less than 0.0001 parts by weight, the effect of inhibiting cloudiness or coloring is insufficient. Conversely, when the amount of the aromatic compound (C) is 0.05 parts by weight or more, it is not preferable because the high level of light transmittance and color required for the optical molded article may not be achieved.

The aromatic polycarbonate resin composition of the embodiment of the present invention may further contain a phosphorus antioxidant (D). As described above, when the aromatic polycarbonate resin composition contains a polyether derivative (B), a specific aromatic compound (C), and a phosphorus antioxidant (D) at the same time, while maintaining and improving excellent optical properties required for an optical molded article, in particular In addition, deterioration such as deterioration and aging deterioration due to the use situation can be prevented without deteriorating the initial optical properties of the molded article made of the resulting aromatic polycarbonate resin composition.

The phosphorus antioxidant is not particularly limited as long as the aromatic polycarbonate resin composition of the present invention can be obtained, but it is preferable to include a phosphorous acid ester compound having the following phosphorous acid ester structure.

In the aromatic polycarbonate resin composition of the embodiment of the present invention, the phosphorous antioxidant (D) is a phosphorous acid ester compound represented by the following formula (11), a phosphorous acid ester compound represented by the following formula (12), and the following formula (13) It is preferable to contain at least one or more compounds selected from a phosphorous acid ester compound represented by) and a phosphorous acid ester compound represented by the following formula (14).

It is preferable that the phosphorus antioxidant (D) contains a compound represented by the following formula (11), for example.

Equation (11):

(In the formula, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and a represents an integer of 0 to 3.)

In the above formula (11), R ¹ is an alkyl group having 1 to 20 carbon atoms, and further, it is preferably an alkyl group having 1 to 10 carbon atoms.

Examples of the compound represented by formula (11) include triphenyl phosphite, tricresyl phosphite, tris(2,4-di-t-butylphenyl)phosphite, trisnonylphenylphosphite, and the like. I can. Among these, tris(2,4-di-t-butylphenyl)phosphite is particularly suitable. For example, Ilgafos 168 manufactured by BASF ("Ilgafos" is a registered trademark of BASF Societas Europia. ) Is commercially available.

It is preferable that the phosphorus antioxidant (D) contains a compound represented by the following formula (12), for example.

Equation (12):

(In the formula, R ² , R ³ , R ⁵ and R ⁶ are each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, and 7 to 12 carbon atoms. Represents an aralkyl group or a phenyl group of R ⁴ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms X is a single bond, a sulfur atom, or a formula: -CHR ^7- (wherein R ⁷ is a hydrogen atom, 1 to carbon atoms Represents a group represented by an alkyl group of 8 or a cycloalkyl group having 5 to 8 carbon atoms) A is an alkylene group having 1 to 8 carbon atoms or the formula: *-COR ^8- (wherein R ⁸ is a single bond or a C 1 to C ⁸⁾ 8 represents an alkylene group, and * represents a group represented by an oxygen-side bonding hand). Y and Z each represent a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms. Group, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.)

In formula (12), R ² , R ³ , R ⁵ and R ⁶ are each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, and It represents 7-12 aralkyl group or phenyl group.

Here, as an alkyl group having 1 to 8 carbon atoms, for example, methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group, t -Pentyl group, i-octyl group, t-octyl group, 2-ethylhexyl group, etc. are mentioned. As a C5-C8 cycloalkyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, etc. are mentioned, for example. As the C6-C12 alkylcycloalkyl group, 1-methylcyclopentyl group, 1-methylcyclohexyl group, 1-methyl-4-i-propylcyclohexyl group, etc. are mentioned, for example. Examples of the aralkyl group having 7 to 12 carbon atoms include a benzyl group, an α-methylbenzyl group, and an α,α-dimethylbenzyl group.

It is preferable that R ² , R ³ and R ⁵ are each independently an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or an alkylcycloalkyl group having 6 to 12 carbon atoms. In particular, it is preferable that R ² and R ⁵ each independently represent a t-alkyl group such as a t-butyl group, a t-pentyl group, and a t-octyl group, a cyclohexyl group, or a 1-methylcyclohexyl group. In particular, R ³ is a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group, t-pentyl group having 1 to 5 carbon atoms, etc. It is preferably an alkyl group, and more preferably a methyl group, t-butyl group, or t-pentyl group.

R ⁶ is preferably a hydrogen atom, an alkyl group having 1 to 8 carbon atoms or a cycloalkyl group having 5 to 8 carbon atoms, and a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, i- It is more preferable that it is a C1-C5 alkyl group, such as a butyl group, a sec-butyl group, a t-butyl group, and a t-pentyl group.

In formula (12), R ⁴ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Examples of the alkyl group having 1 to 8 carbon atoms include the alkyl groups exemplified in the description of R ² , R ³ , R ⁵ and R ⁶ . In particular, R ⁴ is preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and more preferably a hydrogen atom or a methyl group.

In formula (12), X represents a single bond, a sulfur atom, or a group represented by formula: -CHR ⁷ -. Here, R ⁷ in the formula: -CHR ⁷ -represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms. Examples of the C1-C8 alkyl group and the C5-C8 cycloalkyl group include the alkyl groups and cycloalkyl groups exemplified in the descriptions of R ² , R ³ , R ⁵ and R ⁶ , respectively. In particular, X is preferably a single bond, a methylene group, or a methylene group substituted with a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, t-butyl group, etc. It is more preferred that it is a bond.

In formula (12), A represents an alkylene group having 1 to 8 carbon atoms or a group represented by formula: *-COR ⁸ -. Examples of the alkylene group having 1 to 8 carbon atoms include methylene group, ethylene group, propylene group, butylene group, pentamethylene group, hexamethylene group, octamethylene group, 2,2-dimethyl-1,3-propylene group Etc. are mentioned, Preferably it is a propylene group. In addition, R ⁸ in formula: *-COR ⁸ -represents a single bond or an alkylene group having 1 to 8 carbon atoms. Examples of the alkylene group having 1 to ⁸ carbon atoms representing R ⁸ include the alkylene group illustrated in the description of A. R ⁸ is preferably a single bond or an ethylene group. In addition, * in formula: *-COR ⁸ -is a bonding hand on the oxygen side, and indicates that the carbonyl group is bonded to the oxygen atom of the phosphite group.

In formula (12), Y and Z each represent a hydroxyl group, a C 1 to C 8 alkoxy group or a C 7 to C 12 aralkyloxy group, and the other is a hydrogen atom or a C 1 to C 8 alkyl group. Show. As a C1-C8 alkoxy group, a methoxy group, an ethoxy group, a propoxy group, a t-butoxy group, a pentyloxy group, etc. are mentioned, for example. Examples of the aralkyloxy group having 7 to 12 carbon atoms include a benzyloxy group, an α-methylbenzyloxy group, and an α,α-dimethylbenzyloxy group. Examples of the alkyl group having 1 to 8 carbon atoms include the alkyl groups exemplified in the description of R ² , R ³ , R ⁵ and R ⁶ .

As a compound represented by formula (12), for example, 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl) Propoxy]dibenzo[d,f][1,3,2]dioxaphosphepine, 6-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propoxy]-2, 4,8,10-tetra-t-butyldibenzo[d,f][1,3,2]dioxaphosphepine, 6-[3-(3,5-di-t-butyl-4-hydroxy Phenyl)propoxy]-4,8-di-t-butyl-2,10-dimethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphosine, 6-[3-( 3,5-di-t-butyl-4-hydroxyphenyl)propionyloxy]-4,8-di-t-butyl-2,10-dimethyl-12H-dibenzo[d,g][1, 3,2] dioxaphosphocin, etc. are mentioned. Among these, in the case of using the aromatic polycarbonate resin composition obtained, particularly in fields requiring optical properties, 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydride) Roxy-5-t-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphospepine is suitable. For example, Sumitomo Chemical Co., Ltd. SMILLER GP (" "Smilizer" is a registered trademark) and is commercially available.

It is preferable that the phosphorus antioxidant (D) contains a compound represented by the following formula (13), for example.

Equation (13):

(In the formula, R ⁹ and R ¹⁰ each independently represent an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group, and b and c each independently represent an integer of 0 to 3.)

Examples of the compound represented by formula (13) include bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, phenyl bisphenol A pentaerythritol diphosphite, and the like. Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite is commercially available from ADEKA Corporation under the brand name "Adeca Stave PEP-24G". Adeka Stave PEP-36 ("Adeka Stave" is a registered trademark) manufactured by ADEKA Co., Ltd. is commercially available.

It is preferable that the phosphorus antioxidant (D) contains a compound represented by the following formula (14), for example.

Equation (14):

(In the formula, R ¹¹ to R ¹⁸ each independently represent an alkyl group or alkenyl group having 1 to 3 carbon atoms. R ¹¹ and R ¹² , R ¹³ and R ¹⁴ , R ¹⁵ and R ¹⁶ , R ¹⁷ and R ¹⁸ are each independently R ¹⁹ to R ²² may each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, d to g are each independently an integer of 0 to ^5. X ^{1 to} X ⁴ are each independently an integer from 0 to 5. Each independently represents a single bond or a carbon atom In the case where X ^{1 to} X ⁴ are a single bond, among R ¹¹ to R ²² , the functional group linked to the single bond is excluded from the formula (14).)

As a specific example of the compound represented by Formula (14), bis(2,4-dicumylphenyl) pentaerythritol diphosphite is mentioned, for example. This is made by Dover Chemical company, as a brand name "Doverphos (registered trademark) S-9228", a brand name by ADEKA company, and a brand name "adeca stave PEP-45" (bis(2,4-dicumylphenyl) pentaerythritol diphosphite). It is commercially available.

The aromatic polycarbonate resin composition described above, which satisfies at least one selected from the following, is preferred:

The phosphorous acid ester compound represented by the above formula (11) contains tris(2,4-di-t-butylphenyl)phosphite;

The phosphorous acid ester compound represented by the above formula (12) is 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)pro Those containing foxy]dibenzo[d,f][1,3,2]dioxaphosphepine;

The phosphorous acid ester compound represented by the above formula (13) is 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9 -Containing diphosphaspyro[5,5]undecaine); And

The phosphorous acid ester compound represented by the above formula (14) contains bis(2,4-dicumylphenyl) pentaerythritol diphosphite.

The amount of the phosphorus antioxidant (D) is preferably up to 0.5 parts by weight, more preferably 0.02 to 0.2 parts by weight, based on 100 parts by weight of the aromatic polycarbonate resin (A).

In addition to the above components, in the aromatic polycarbonate resin composition according to the embodiment, for example, an ultraviolet absorber, which is a component that further improves the weather resistance of the aromatic polycarbonate resin composition obtained, is added to the molded article obtained by molding the aromatic polycarbonate resin composition. It can be appropriately used depending on the application.

As the ultraviolet absorber, for example, a benzotriazole-based compound, a triazine-based compound, a benzophenone-based compound, an oxalic acid anilide-based compound, and other ultraviolet absorbers that are usually blended in a polycarbonate resin, alone or two or more thereof Can be used in combination.

Examples of the benzotriazole-based compound include 2-(2-hydroxy-5-t-octylphenyl)benzotriazole, 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5- chloro-2H-benzotriazole, 2-(3,5-di-tert-pentyl-2-hydroxyphenyl)-2H-benzotriazole, 2-(2H-benzotriazole-2-yl)-4-methyl-6-(3,4 ,5,6-tetrahydrophthalimidylmethyl)phenol, 2-(2-hydroxy-4-octyloxyphenyl)-2H-benzotriazole, 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole, 2-[2'-hydroxy -3,5-di(1,1-dimethylbenzyl)phenyl]-2H-benzotriazole, 2,2'-Methylenbis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3- tetramethylbutyl)phenol] and the like. Among them, in particular, 2-(2-hydroxy-5-t-octylphenyl)benzotriazole, etc. are suitable. For example, BASF's TINUVIN 329 (TINUVIN is a registered trademark), Cipro Chemical Co., Ltd. Seesov 709 manufactured by Chemipro, Chemisov 79 manufactured by Hwasung Corporation, etc. are commercially available.

Examples of the triazine-based compound include 2,4-diphenyl-6-(2-hydroxyphenyl-4-hexyloxyphenyl)-1,3,5-triazine, 2-[4,6-bis (2,4-Dimethylphenyl)-1,3,5-triazin-2-yl]-5-(octyloxy)phenol, 2-(4,6-diphenyl-1,3,5-triazine- 2-yl)-5-[(hexyl)oxy]phenol etc. are mentioned, For example, BASF TINUVIN 1577 etc. are commercially available.

As the oxalic acid anilide-based compound, for example, Sanduvor VSU manufactured by Clariant Japan Co., Ltd. is commercially available.

As a benzophenone-based compound, 2,4-dihydroxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, etc. are mentioned, for example.

The amount of the ultraviolet absorber is 0 to 1.0 parts by weight, preferably 0 to 0.5 parts by weight, based on 100 parts by weight of the aromatic polycarbonate resin (A). When the amount of the ultraviolet absorber exceeds 1.0 part by weight, there is a concern that the initial hue of the resulting aromatic polycarbonate resin composition may decrease. In addition, when the amount of the ultraviolet absorber is 0.1 parts by weight or more, the effect of further improving the weather resistance of the aromatic polycarbonate resin composition is particularly large.

The aromatic polycarbonate resin composition of the embodiment of the present invention can contain an epoxy compound (E). As described above, when the aromatic polycarbonate resin composition contains a polyether derivative (B), a specific aromatic compound (C), and an epoxy compound (E) at the same time, while maintaining and improving excellent optical properties required for an optical molded article, It is possible to prevent deterioration such as deterioration or aging deterioration due to the use situation without deteriorating the initial optical properties of the molded article made of the aromatic polycarbonate resin composition.

The epoxy compound (E) is not particularly limited as long as it has at least one epoxy group in its molecule, and the aromatic polycarbonate resin composition as the object of the present invention can be obtained. Epoxy compound (E) is, for example, 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate, epoxidized soybean oil, ε-caprolactone modified 3',4'-epoxycyclo Hexylmethyl 3,4-epoxycyclohexane carboxylate, an epoxy group-containing acrylic-styrene polymer, 2,2-bis(4-hydroxycyclohexyl)propane-diglycidyl ether, and the like. It is preferable that the epoxy compound (E) contains 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate.

The aromatic polycarbonate resin composition of the embodiment of the present invention preferably contains 0.001 to 0.2 parts by mass of the epoxy compound (E), and contains 0.002 to 0.1 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin (A). It is more preferable, and it is particularly preferable to contain 0.005 to 0.05 parts by mass.

The aromatic polycarbonate resin composition of the embodiment of the present invention maintains excellent optical properties required for an optical molded article when 0.001 to 0.2 parts by mass of the epoxy compound (E) is included with respect to 100 parts by mass of the aromatic polycarbonate resin (A). While improving, the initial optical properties (accumulated transmittance and yellowness) of the molded article made of the resulting aromatic polycarbonate resin composition can be improved, and deterioration such as deterioration or aging deterioration due to the use situation can be prevented.

In addition, in the aromatic polycarbonate resin composition according to the embodiment, within a range that does not impair the effects in the present invention, for example, heat stabilizers, other antioxidants, colorants, release agents, softeners, antistatic agents, impact modifiers, etc. Various additives and polymers other than the aromatic polycarbonate resin (A) may be appropriately blended.

In the aromatic polycarbonate resin composition of the embodiment of the present invention, an aromatic polycarbonate resin (A), a polyether derivative (B), and a specific aromatic compound (C) are mixed, and if necessary, a phosphorus antioxidant (D), A manufacturing method of mixing an epoxy compound (E), the various additives, and a polymer other than the aromatic polycarbonate resin (A) can be illustrated. As long as the aromatic polycarbonate resin composition as the object of the present invention can be obtained, the method for producing the same is not particularly limited, and the type and amount of each component can be appropriately adjusted. The mixing method of the components is also not particularly limited, and examples thereof include a method of mixing with a known mixer such as a tumbler and a ribbon blender, or a method of melt-kneading with an extruder. By these methods, pellets of an aromatic polycarbonate resin composition can be easily obtained. The specific aromatic compound (C) may be mixed before melt-kneading, or may be added or mixed in advance to the polyether derivative (B).

The shape and size of the pellets of the aromatic polycarbonate resin composition obtained as described above are not particularly limited, and the shape and size of general resin pellets may be used. For example, as a shape of a pellet, an elliptical column shape, a cylinder shape, etc. are mentioned. As the size of the pellet, it is suitable that the length is about 2 to 8 mm, and in the case of an elliptical column shape, the long diameter of the short ellipse is about 2 to 8 mm, and the short diameter is about 1 to 4 mm, and in the case of a cylinder shape, It is suitable that the diameter of the cross-sectional circle is about 1 to 6 mm. On the other hand, each of the obtained pellets may have such a size, all the pellets forming the pellet aggregate may have such a size, and the average value of the pellet aggregate may be such a size, and there is no particular limitation.

The optical molded article of the embodiment of the present invention can be obtained by molding the aromatic polycarbonate resin composition described above.

As long as the optical molded article of the object of the present invention can be obtained, the method of manufacturing the optical molded article is not particularly limited, and for example, a method of molding an aromatic polycarbonate resin composition by a known injection molding method or compression molding method is used. Can be lifted.

The optical molded article according to the present invention is suitable as, for example, a light guide plate, a surface light-emitting material, a light guide film, a light guide for a vehicle, a name plate, and the like.

As described above, as an example of the present invention, embodiments have been described. However, the technique in the present invention is not limited to this, and it can be applied to embodiments in which appropriate changes, substitutions, omissions, and the like are made.

Example

Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples. On the other hand, unless otherwise specified, "parts" and "%" are each based on weight.

The following were used as raw materials.

1. Aromatic polycarbonate resin (A):

Polycarbonate resin synthesized from bisphenol A and carbonyl chloride

Viscosity average molecular weight: 15000, SD Polycar 200-80 (brand name) manufactured by Sumica Polycarbonate Co., Ltd., ``SD Polycar'' is a registered trademark of Sumica Polycarbonate Co., Ltd., hereinafter also referred to as "PC" or (A1).

2. Polyether derivative (B):

2-1. Modified glycol (random copolymerization) consisting of tetramethylene glycol unit and propylene glycol unit

Weight average molecular weight: 2000, pH: 6.7 (JIS K1557-5), Nichiyu Co., Ltd. polyserine DCB-2000 (brand name), hereinafter also referred to as (B1)

2-2. Modified glycol (random copolymerization) consisting of tetramethylene glycol unit and propylene glycol unit

Weight average molecular weight: 1000, pH: 6.8 (JIS K1557-5), Nichiyu Co., Ltd. polyserine DCB-1000 (brand name), hereinafter also referred to as (B2)

2-3. Modified glycol (random copolymerization) consisting of tetramethylene glycol unit and ethylene glycol unit

Weight average molecular weight: 3000, Nichiyu Co., Ltd. polyserine DC-3000E (brand name), hereinafter also referred to as (B3)

2-4. Modified glycol (random copolymerization) consisting of a tetramethylene glycol unit and a propylene glycol unit, which is a single terminal butyl group

Weight average molecular weight: 1000, Nichiyu Co., Ltd. polyserine BC-1000 (brand name), hereinafter also referred to as (B4)

2-5. Modified glycol (random copolymerization) consisting of ethylene glycol unit and propylene glycol unit

Weight average molecular weight: 1750, Nichiyu Co., Ltd. UniLube 50DE-25 (brand name), hereinafter also referred to as (B5)

2-6. Modified glycol (random copolymerization) consisting of an ethylene glycol unit and a propylene glycol unit, which is a butyl group at one end

Weight average molecular weight: 2000, Nichiyu Co., Ltd. UniLube 50MB-26 (brand name), hereinafter also referred to as (B6)

2-7. Polypropylene glycol

Weight average molecular weight: 2000, Polyglycol P2000P (brand name) manufactured by Dow Chemical, hereinafter also referred to as (B7)

2-8. Polytetramethylene glycol

Weight average molecular weight: 1000, PTG-1000SN (brand name) manufactured by Hodogaya Chemical Industries, Ltd., also referred to as (B8) hereinafter

2-9. Modified glycol (random copolymerization) consisting of tetramethylene glycol unit and 2-methyl tetramethylene glycol unit

Weight average molecular weight: 2000, PTG-L2000 (brand name) manufactured by Hodogaya Chemical Industries, Ltd., also referred to as (B9) hereinafter

3. Aromatic compound (C):

3,5-di-t-butyl-4-hydroxytoluene

[Wako Pure Chemical Industries, Ltd., also referred to as (C1)]

4. Phosphorus antioxidant (D):

4-1. Tris (2,4-di-t-butylphenyl) phosphite represented by the following formula

[Ilgafos 168 (brand name) manufactured by BASF, hereinafter also referred to as (D1)]

4-2. 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)propoxy]dibenzo[d, represented by the following formula f][1,3,2]dioxaphosphepine

[Sumitomo Chemical Co., Ltd. SMILLER GP (brand name), hereinafter also referred to as (D2)]

4-3. Bis(2,4-dicumylphenyl) pentaerythritol diphosphite represented by the following formula (IUPAC name: 3,9-bis[2,4-bis(α,α-dimethylbenzyl)phenoxy]- 2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecaine)

[Doverphos S-9228 (brand name) manufactured by Dover Chemical, hereinafter also referred to as (D3)]

4-4. Bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite (IUPAC name: 3,9-bis (2,6-di-tert-butyl-4-) represented by the following formula Methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecaine)

[ADEKA STAB PEP-36 (brand name), hereinafter also referred to as (D4)]

5. Epoxy compound (E)

3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexyl carboxylate

[Celoxide 2021P (brand name) manufactured by Daicel Chemical Industries, Ltd., also referred to as (E1)]

(Examples 1 to 33 and Comparative Examples 1 and 2)

Each of the above raw materials was put into a tumbler at the ratio shown in Tables 1 to 4, and after dry mixing for 10 minutes, using a twin-screw extruder (manufactured by Nihon Steel Mill, TEX30α) at a melting temperature of 220°C. By melt-kneading, pellets of each of the aromatic polycarbonate resin compositions of Examples 1 to 33 and Comparative Examples 1 and 2 were obtained.

However, in Example 7, after mixing the compound (C) and the compound (B) in advance, they were mixed with other raw materials to obtain pellets of the aromatic polycarbonate resin composition of Example 7.

On the other hand, the pellets obtained in Examples and Comparative Examples are all in the shape of an elliptical column, and the aggregates composed of 100 pellets each have an average length of about 5.1 mm to about 5.4 mm, and an average of the long diameter of the cross-sectional ellipse is about 4.1 mm to about 4.3 mm. , The average value of the short diameter was about 2.2 mm to about 2.3 mm.

Using the obtained pellet, according to the following method, each test piece for evaluation was produced, and it was provided for evaluation. The results are shown in Tables 1 to 4.

(How to make a test piece)

After drying the obtained pellet at 120°C for 4 hours or more, using an injection molding machine (manufactured by Fanak Co., Ltd., ROBOSHOT S2000i100A), at a molding temperature of 360°C and a mold temperature of 80°C, as specified in JIS K 7139 “Plastic-Test Piece” A multipurpose test piece, A type (length 168 mm × thickness 4 mm) was produced. The end surface of this test piece was cut, and the cut end surface was mirror-finished using a resin plate end face mirror (Megaro Technica Co., Ltd. product, Flavorie PB-500).

(Evaluation method of accumulated transmittance)

A long light path measurement accessory was installed in the spectrophotometer (made by Hitachi Co., Ltd., UH4150), and a 50W halogen lamp was used as a light source, and the mask before the light source was 5.6mm×2.8mm and the mask before the sample was 6.0mm×2.8mm. In the state in which it was used, the spectral transmittance of each of the test pieces at each 1 nm in the wavelength range of 380 to 780 nm was measured with respect to the total length direction of the test piece. By integrating the measured spectral transmittance and rounding off the digits, each integrated transmittance was determined. On the other hand, the integrated transmittance was 31000 or more as good (in the table, indicated by ◎), less than 31000 and 25000 or more were usable (in the table, indicated by ○), and less than 25000 as defective (in the table, indicated by x).

(Evaluation method of yellowness)

Based on the spectral transmittance measured in the cumulative transmittance evaluation method, the standard light source D65 was used to determine each yellowness (hereinafter, YI) in a 10-degree field of view. On the other hand, if YI was 15 or less as good (in the table, indicated by ◎), more than 15 and 30 or less were usable (in the table, indicated by ○), and when it exceeded 30, it was set as defective (in the table, indicated by x).

(Evaluation of heating test of molded products)

The test piece produced above was installed in an inner oven IPHH-201M manufactured by SPEC Co., Ltd., and a heating test was performed at 200°C for 72 hours.

Next, the surface of each test piece was visually observed. The state after the heating test was evaluated by the following criteria. The results are shown in Tables 1 to 4.

◎: Colorless and transparent.

○: It is transparent and can be used, but there is slight coloration.

X: There is opaque or dark coloring.

In Tables 1 to 4, raw materials and blending ratios and evaluation results of each Example and Comparative Example are shown together.

a): (C1) was mixed with (B1) and then mixed with other raw materials.

b): It became cloudy.

c): I didn't test.

The aromatic polycarbonate resin composition of Examples 1 to 33 contains an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C), and if necessary, a phosphorus antioxidant (D), etc. , Each in a specific ratio. Therefore, the test piece molded from the aromatic polycarbonate resin composition has a high cumulative transmittance, a small yellowness, and hardly deteriorates after a heating test.

Further, the molded article obtained by molding such an aromatic polycarbonate resin composition has a small yellowness and excellent hue, and hardly deteriorates after a heating test.

On the other hand, the aromatic polycarbonate resin composition of Comparative Examples 1 and 2 has a large amount of the polyether derivative (Compound B1), so the integrated transmittance is low and the yellowness is high. As described above, the molded article obtained by molding the aromatic polycarbonate resin composition of Comparative Example 1 is inferior in brightness and hue. Moreover, the result after the heating test was also inferior.

As described above, the embodiment has been described as an example of the technology in the present invention. I provided a detailed explanation for him.

Therefore, among the constituent elements described in the detailed description, not only constituent elements essential for solving the problem, but also constituent elements that are not essential for solving the problem may be included in order to illustrate the above technology. Therefore, it should not be admitted that those non-essential components are described in the detailed description, and immediately, those non-essential components are essential.

In addition, since the above-described embodiment is for illustrating the technology in the present invention, various changes, substitutions, additions, omissions, etc. can be made within the scope of the claims or their equivalents.

The aromatic polycarbonate resin composition of the present invention does not impair properties such as heat resistance and mechanical strength inherent in the polycarbonate resin, has excellent thermal stability and weather resistance, and further comprises the aromatic polycarbonate resin composition of the present invention. Even when the molded article is heated, the appearance and optical properties are excellent. Therefore, for example, even when a thin light guide light source having a thickness of about 0.3 mm is used for an application in which a heating state is continued by long-term irradiation to the surface of the light guide plate, the color of the resulting light guide plate does not change and the appearance or optical properties are not deteriorated The industrial use value is extremely high.

Related application

On the other hand, this application has priority based on Article 4 of the Paris Treaty based on application number 2018-11641 filed in Japan on January 26, 2018 and application number 2018-156195 filed in Japan on August 23, 2018. Insist. The contents of these basic applications are incorporated herein by reference.

Claims (17)

An aromatic polycarbonate resin composition comprising an aromatic polycarbonate resin (A), a polyether derivative (B) and an aromatic compound (C) represented by the following formula,
An aromatic polycarbonate containing 0.1 parts by weight or more and 2.0 parts by weight or less of a polyether derivative (B) and 0.0001 parts by weight or more and less than 0.05 parts by weight of an aromatic compound (C) based on 100 parts by weight of the aromatic polycarbonate resin (A) Resin composition.
expression:

The method of claim 1,
An aromatic polycarbonate resin composition in which the polyether derivative (B) is represented by the following formula (1) and contains a polyether derivative having a weight average molecular weight of 500 to 8000.
Equation (1):
RO-(XO)m(YO)n-R'
(In the formula, R and R'each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a straight chain alkylene group or branched alkylene group having 2 to 4 carbon atoms, and Y is a straight chain alkyl group having 2 to 5 carbon atoms. Represents a ene group or a branched alkylene group, X and Y may be the same or different, m and n each independently represent 3 to 60, and m+n represents 6 to 120.) The method of claim 2,
The polyether derivative represented by formula (1) is a polyether derivative represented by the following formula (2), a polyether derivative represented by formula (3), a polyether derivative represented by formula (4), Polyether derivative represented by formula (5), polyether derivative represented by formula (6), polyether derivative represented by formula (7), polyether derivative represented by formula (8), formula ( An aromatic polycarbonate resin composition comprising at least one selected from a polyether derivative represented by 9) and a polyether derivative represented by formula (10).
Equation (2):
HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH
(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.);
Equation (3):
HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH ₂ CH ₂ CH(CH ₃ )CH ₂ O)nH
(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.);
Equation (4):
HO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH
(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.);
Equation (5):
RO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH
(In the formula, R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, and m+n represents 8 to 90.);
Equation (6):
RO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH
(In the formula, R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, and m+n represents 8 to 90.);
Equation (7):
HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH ₂ CH ₂ O)nH
(In the formula, m and n each independently represent 3 to 60, and m+n represents 8 to 90.);
Equation (8):
HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)pH
(In the formula, p represents 6 to 100.);
Equation (9):
HO-(CH(CH ₃ )CH ₂ O)qH
(In the formula, q represents 7 to 120.);
And
Equation (10):
HO-(CH(C ₂ H ₅ )CH ₂ O)rH
(In formula, r represents 6-100.) The method according to any one of claims 1 to 3,
An aromatic polycarbonate resin composition having a CPR of 2.0 or less of the polyether derivative (B) as measured in accordance with JIS K1557-4. The method according to any one of claims 1 to 4,
An aromatic polycarbonate resin composition in which the pH of the polyether derivative (B) measured in accordance with JIS K1557-5 is 5.0 or more and less than 7.5. The method according to any one of claims 1 to 5,
An aromatic polycarbonate resin composition in which the temperature at which the polyether derivative (B) becomes 90% weight (or the temperature at which the weight reduction rate becomes 10%) is 300°C or higher, as measured by thermogravimetric measurement in accordance with JIS K7120. The method according to any one of claims 1 to 6,
An aromatic polycarbonate resin composition comprising 0.0005 parts by weight or more to less than 0.003 parts by weight of an aromatic compound (C) based on 100 parts by weight of the aromatic polycarbonate resin (A). The method according to any one of claims 1 to 7,
An aromatic polycarbonate resin composition containing up to 0.5 parts by weight of a phosphorus antioxidant (D) with respect to 100 parts by weight of the aromatic polycarbonate resin (A). The method of claim 8,
The aromatic polycarbonate resin composition, wherein the phosphorus antioxidant (D) contains a phosphorous acid ester compound having the following phosphorous acid ester structure.

The method of claim 9,
The aromatic polycarbonate resin composition, wherein the phosphorus antioxidant (D) contains at least one or more compounds selected from phosphorous acid ester compounds represented by the following formulas (11), (12), (13) and (14).
Equation (11):

[In the formula, R ¹ represents an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group, and a represents an integer of 0 to 3.]
Equation (12):

[In the formula, R ² , R ³ , R ⁵ and R ⁶ are each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, and 7 to 12 carbon atoms. Represents an aralkyl group or a phenyl group of. R ⁴ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. X represents a single bond, a sulfur atom, or a group represented by the formula: -CHR ^7- (wherein R ⁷ represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms). A is an alkylene group having 1 to 8 carbon atoms or a formula: *-COR ^8- (here, R ⁸ represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents an oxygen-side bond) Represents a group. Each of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.]
Equation (13):

[In the formula, R ⁹ and R ¹⁰ represent an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group, and b and c each independently represent an integer of 0 to 3.]
Equation (14):

[In the formula, R ¹¹ to R ¹⁸ each independently represent a C 1 to C 3 alkyl group or an alkenyl group. R ¹¹ and R ¹² , R ¹³ and R ¹⁴ , R ¹⁵ and R ¹⁶ , and R ¹⁷ and R ¹⁸ may be bonded to each other to form a ring. Each of R ¹⁹ to R ²² independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. d to g are each independently an integer of 0 to 5. Each of X ^{1 to} X ⁴ independently represents a single bond or a carbon atom. When X ^{1 to} X ⁴ are a single bond, among R ¹¹ to R ²² , the functional group linked to the single bond is excluded from formula (9).] The method of claim 10,
An aromatic polycarbonate resin composition that satisfies at least one selected from the following.
The phosphorous acid ester compound represented by the above formula (11) contains tris(2,4-di-t-butylphenyl)phosphite;
The phosphorous acid ester compound represented by the above formula (12) is 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)pro Those containing foxy]dibenzo[d,f][1,3,2]dioxaphosphepine;
The phosphorous acid ester compound represented by the above formula (13) is 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9 -Containing diphosphaspyro[5,5]undecaine); And
The phosphorous acid ester compound represented by the above formula (14) contains bis(2,4-dicumylphenyl) pentaerythritol diphosphite. The method according to any one of claims 1 to 11,
An aromatic polycarbonate resin composition further containing 0.001 to 0.2 parts by mass of an epoxy compound (E) with respect to 100 parts by weight of the aromatic polycarbonate resin (A). The method of claim 12,
The aromatic polycarbonate resin composition, wherein the epoxy compound (E) contains 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate. The method according to any one of claims 1 to 13,
An aromatic polycarbonate resin composition further containing at least one selected from the group consisting of a heat stabilizer, an antioxidant, a colorant, a release agent, a softener, an antistatic agent, and an impact improving agent. A molded article for optics comprising the aromatic polycarbonate resin composition according to any one of claims 1 to 14. The method of claim 15,
The optical molded article comprises a molded article selected from a light guide plate, a surface illuminant material, a light guide film, a vehicle light guide, and a name plate. A method for producing a molded article for optics, comprising molding the aromatic polycarbonate resin composition according to any one of claims 1 to 14.