JP7060013B2 - Resin composition and method for producing the resin composition - Google Patents

Description

The present art relates to a resin composition and a method for producing the resin composition.

Resin compositions containing a polycarbonate resin are used in various fields such as exteriors, electronic and electrical applications, optical disk substrates, and the like.

However, in the future, as the applications are expanded to the fields of OA / copiers, automobiles, medical materials, etc., further improvement in the performance of resin compositions containing polycarbonate resins is desired.

For example, a glycol containing 40 mol% or more of 1,4-cyclohexanedimethanol and one or more dicarboxylic acid-based polycondensation components selected from the group consisting of terephthalic acid and terephthalic acid derivatives. A transparent face plate for outdoor use has been proposed, which comprises 60 to 80 parts by weight of a polyester resin obtained by polycondensing a system polycondensation component and 40 to 20 parts by weight of a polycarbonate resin (Patent Document 1). See).

Further, for example, a curable coating material for a polycarbonate resin containing a compound (A) having two or more (meth) acryloyl groups in a molecule, conductive fine particles (B) and an organic solvent (C), said organic. A curable paint for a polycarbonate resin is proposed, which comprises a compound (C-1) having a solubility parameter of at least 8.0 to 10.0 (cal / cm ³ ) ^1/2 as the solvent (C). (See Patent Document 2).

Japanese Unexamined Patent Publication No. 2000-63641 Japanese Unexamined Patent Publication No. 2011-74228

However, the techniques proposed in Patent Documents 1 and 2 may not be able to further improve the physical characteristics of the resin.

Therefore, it is a main object of the present technique to provide a resin composition having excellent resin physical properties and a method for producing a resin composition having excellent resin physical properties.

As a result of diligent research to solve the above-mentioned object, the present inventors have surprisingly obtained a resin by using an aromatic polycarbonate resin and a polyurethane resin having a crosslinked structure in a predetermined composition ratio. We succeeded in dramatically improving the physical properties and completed this technology.

That is, the present technology provides a resin composition containing 100 parts by mass of an aromatic polycarbonate resin and 0.01 to 5.0 parts by mass of a polyurethane resin having a crosslinked structure, wherein the polyurethane resin is a cured resin.

The average particle size of the polyurethane resin powder having a crosslinked structure may be 0.5 mm to 1.5 mm.

The ratio of the particle size of the polyurethane resin powder having the crosslinked structure to the total powder of the polyurethane resin having the crosslinked structure may be 70% or more.

The polyurethane resin having a crosslinked structure may be obtained from the reaction of a polyester polyol with a polyisocyanate.
The mass ratio of the polyester polyol to the polyisocyanate may be 100: 50 to 100: 200.
The hydroxyl value of the polyester polyol may be 30 to 300.
The polystyrene-equivalent weight average molecular weight of the polyester polyol may be 10,000 or more and 500,000 or less.
The polyisocyanate may have two or more isocyanate groups.

The organic sulfonic acid and / or the organic sulfonic acid metal salt compound may further contain 0.01 to 3.0 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin.
The polystyrene-equivalent weight average molecular weight of the organic sulfonic acid metal salt compound may be 30,000 or more.
The organic sulfonic acid metal salt compound may contain a sulfonic acid metal base, and the content of the sulfonic acid metal base may be 0.1 to 10 mol%.

The aromatic polycarbonate resin may contain a regenerated polycarbonate resin, and the content of the regenerated polycarbonate resin may be less than 1 to 100% by mass with respect to the total mass of the aromatic polycarbonate resin.

In the resin composition according to the present technology, 0.01 to 5.0 parts by weight of the polyurethane resin having a crosslinked structure is added to 100 parts by mass of the aromatic polycarbonate resin to form the aromatic polycarbonate resin and the crosslinked structure. It may be obtained by kneading with a polyurethane resin having.

Further, in the present technology, 0.01 to 5.0 parts by weight of a polyurethane resin having a crosslinked structure is added to 100 parts by mass of the aromatic polycarbonate resin, and the aromatic polycarbonate resin and the polyurethane resin having the crosslinked structure are used. Provided is a method for producing a resin composition, which comprises kneading the resin composition.

The method for producing a resin composition according to the present technique may include reacting a polyester polyol with a polyisocyanate to produce a polyurethane resin having the crosslinked structure.

According to this technique, the physical characteristics of the resin can be improved. The effects described here are not necessarily limited, and may be any of the effects described in the present technique.

Hereinafter, suitable embodiments for carrying out this technique will be described. The embodiments described below show an example of a typical embodiment of the present technique, and the scope of the present technique is not narrowly interpreted by this.

The explanation will be given in the following order.
1. 1. Outline of this technology 2. First Embodiment (Example of resin composition)
2-1. Resin composition 2-2. Aromatic polycarbonate resin 2-3. Polyurethane resin 2-4. Polyester polyol 2-5. Polyisocyanate 2-6. Organic sulfonic acid and organic sulfonic acid metal salt compound 2-7. Anti-drip agent 2-8. Other ingredients 3. Second embodiment (example of a method for producing a resin composition)
3-1. Method for manufacturing resin composition 4. Third embodiment (example of resin molded product)
4-1. Resin molded body 4-2. Manufacturing method of resin molded product

<1. Overview of this technology>
First, the outline of this technique will be described.
The present art relates to a resin composition containing an aromatic polycarbonate resin having improved resin physical properties and a polyurethane resin having a crosslinked structure. Further, more specifically, this technique improves the surface physical characteristics such as solvent resistance, chemical resistance, and scratch resistance without coating the surface with a coating material, and has excellent resistance inherent in aromatic polycarbonate resin. The present invention relates to a resin composition having improved fluidity without impairing performance such as mechanical properties such as impact resistance. The present technique also relates to a method for producing the resin composition.

The resin composition containing a polycarbonate resin (for example, an aromatic polycarbonate resin) is excellent in heat resistance, impact resistance, transparency and the like. However, a resin composition containing a polycarbonate resin (for example, an aromatic polycarbonate resin) may have low fluidity and poor moldability, and surface physical properties such as solvent resistance and chemical resistance may deteriorate. There is. At present, improvement of surface physical properties such as fluidity, solvent resistance, and chemical resistance of a resin composition containing a polycarbonate resin (for example, an aromatic polycarbonate resin) is desired.

As a method for improving the fluidity and chemical resistance of the polycarbonate resin, there is a technique of melt-kneading a polyester resin such as polyethylene terephthalate resin (PET) or polybutylene terephthalate resin (PBT) with the polycarbonate resin. However, since polyethylene terephthalate resin (PET) and polybutylene terephthalate resin (PBT) are inferior in compatibility with polycarbonate resin, melt kneading significantly impairs the mechanical properties characteristic of polycarbonate resin, and further, polyethylene terephthalate resin (polybutylene terephthalate resin). PET) and polybutylene terephthalate resin (PBT) have a low glass transition temperature, so that the heat resistance may be significantly reduced.

Further, as a technique for improving chemical resistance, scratch resistance, etc., there is a method of coating a polycarbonate resin after molding with a coating material to improve chemical resistance. However, the mechanical properties of the polycarbonate resin may be significantly reduced due to the erosion of the solvent or the material. Therefore, even in the coating method, it is difficult to achieve both surface and mechanical properties.

This technique was made as a result of intensive research by the present inventors in view of the above circumstances. The present technology provides a resin composition containing 100 parts by mass of an aromatic polycarbonate resin and 0.01 to 5.0 parts by mass of a polyurethane resin having a crosslinked structure, wherein the polyurethane resin is a cured resin. Further, in the present technology, 0.01 to 5.0 parts by weight of a polyurethane resin having a crosslinked structure is added to 100 parts by mass of an aromatic polycarbonate resin, and the aromatic polycarbonate resin and the polyurethane resin having a crosslinked structure are mixed. Provided is a method for producing a resin composition, which comprises smelting. Further, the present technique provides a resin molded body obtained by molding a resin composition according to the present technique.

According to the present technology, a resin composition having improved surface physical properties such as fluidity, solvent resistance, chemical resistance, and scratch resistance is provided without deteriorating mechanical properties such as impact resistance. .. Further, according to the present technology, when a flame retardant (for example, an organic sulfonic acid, an organic sulfonic acid metal salt compound, etc.) is further contained, a resin composition further imparted with flame retardancy is provided.

Further, since the present technology may use an aromatic polycarbonate resin containing a recovered polycarbonate resin such as a waste optical disc, the recovered polycarbonate resin such as a waste optical disc can be effectively used as a raw material, and therefore the aromatic polycarbonate resin can be effectively used. Can contribute to resource saving.

<2. First Embodiment (Example of resin composition)>
[2-1. Resin composition]
Hereinafter, the resin composition of the first embodiment (example of the resin composition) according to the present technique will be described in detail.

The resin composition of the first embodiment according to the present technology contains 100 parts by mass of an aromatic polycarbonate resin and 0.01 to 5.0 parts by mass of a polyurethane resin having a crosslinked structure, and the polyurethane resin is a cured resin. , A resin composition. The polyurethane resin having a crosslinked structure may be a photocurable resin obtained by curing the curable polyurethane resin composition with light (for example, ultraviolet light) or a heat-curable resin obtained by curing with heat.

According to the resin composition of the first embodiment according to the present technique, the surface such as fluidity, solvent resistance, chemical resistance, scratch resistance, etc. is maintained while maintaining the performance of mechanical physical properties such as impact resistance. Physical characteristics improve. The improvement in fluidity improves the processability (moldability, etc.) of the resin composition.

The content of the polyurethane resin having a crosslinked structure in the resin composition is 0.01 to 5.0 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin, but from the viewpoint of further improving the mechanical properties. , 0.05 to 3.0 parts by mass, preferably.

[2-2. Aromatic polycarbonate resin]
The resin composition of the first embodiment according to the present technique contains an aromatic polycarbonate resin. The content of the aromatic polycarbonate resin may be any amount, but is preferably 94.5 to 99.5% by mass, preferably 96 to 98% by mass, based on the total mass of the resin composition. More preferred.

The aromatic polycarbonate resin is used as a raw material for manufacturing a molded component of the resin composition of the first embodiment according to the present technology, and is used for applications such as optical discs and housing materials for home appliances. Usually, an aromatic polycarbonate resin produced by a reaction between a divalent phenol and a carbonate precursor can be used. Examples of the reaction method include an interfacial polymerization method, a melt transesterification method, a solid phase transesterification method of a carbonate prepolymer, and a ring-opening polymerization method of a cyclic carbonate compound. As for these divalent phenols and carbonate precursors, various ones can be used without particular limitation.

The aromatic polycarbonate resin may be a polyester carbonate obtained by copolymerizing an aromatic dicarboxylic acid, for example, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid or a derivative thereof, as long as the purpose of the present technology is not impaired. Further, a thermoplastic resin other than the aromatic polycarbonate resin can be blended as long as the resin physical properties of the resin composition of the first embodiment according to the present technique are not impaired. The blending amount of the other thermoplastic resin varies depending on the type and purpose, but is usually preferably 1 to 30 parts by mass, more preferably 2 to 20 parts by mass per 100 parts by mass of the aromatic polycarbonate resin. Examples of other thermoplastic resins include general-purpose plastics typified by polyethylene resin, polypropylene resin, polyalkyl methacrylate resin, polyphenylene ether resin, polyacetal resin, polyamide resin, cyclic polyolefin resin, and polyallylate resin (acrystalline). Engineering plastics typified by polyarylate, liquid crystal polyarylate, etc., so-called super-engineering plastics such as polyether ether ketone, polyetherimide, polysulfone, polyether sulfone, polyphenylene sulfide, etc. can be mentioned. .. Further, thermoplastic elastomers such as olefin-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, and polyurethane-based thermoplastic elastomers can also be used.

Hereinafter, the aromatic polycarbonate resin will be described in more detail.

(Aromatic polycarbonate resin with a branched structure)
The aromatic polycarbonate resin contained in the resin composition of the first embodiment according to the present technology may contain an aromatic polycarbonate resin having a branched structure (sometimes referred to as a branched aromatic polycarbonate resin).

The branched aromatic polycarbonate (PC) resin is not particularly limited as long as it is a branched aromatic polycarbonate resin, and has, for example, a branched nuclear structure derived from a branching agent represented by the following general formula (I). However, the viscosity average molecular weight is 15,000 to 40,000, preferably 17,000 to 30,000, more preferably 17,000 to 27,000, and the amount of the branching agent used is. , A branched aromatic polycarbonate resin preferably in the range of 0.01 to 3 mol%, more preferably 0.1 to 2.0 mol% with respect to the dihydric phenol compound.

R is hydrogen or an alkyl group having 1 to 5 carbon atoms, for example, a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group and the like. Further, R1 to R6 are independently hydrogen, an alkyl group having 1 to 5 carbon atoms (for example, a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, etc.) or a halogen atom (for example, chlorine). Atomic, bromine atom, fluorine atom, etc.).

The branching agent represented by the general formula (I) is more specifically 1,1,1-tris (4-hydroxyphenyl) -methane; 1,1,1-tris (4-hydroxyphenyl) -ethane; 1,1,1-Tris (4-hydroxyphenyl) -propane; 1,1,1-Tris (2-methyl-4-hydroxyphenyl) -methane; 1,1,1-Tris (2-methyl-4-4) Hydroxyphenyl) -Etan; 1,1,1-Tris (3-methyl-4-hydroxyphenyl) -methane; 1,1,1-Tris (3-methyl-4-hydroxyphenyl) -Etan; 1,1, 1-Tris (3,5-dimethyl-4-hydroxyphenyl) -methane; 1,1,1-Tris (3,5-dimethyl-4-hydroxyphenyl) -ethane; 1,1,1-Tris (3-) Chloro-4-hydroxyphenyl) -methane; 1,1,1-tris (3-chloro-4-hydroxyphenyl) ethane; 1,1,1-tris (3,5-dichloro-4-hydroxyphenyl) -methane 1,1,1-Tris (3,5-dichloro-4-hydroxyphenyl) -ethane; 1,1,1-Tris (3-bromo-4-hydroxyphenyl) -methane; 1,1,1-Tris (3-Bromo-4-hydroxyphenyl) -ethane; 1,1,1-tris (3,5-dibromo-4-hydroxyphenyl) -methane; 1,1,1-tris (3,5-dibromo-4) -Hydroxyphenyl) -Etan, 4,4'-[1- [4- [1- (4-Hydroxyphenyl) -1-methylethyl] phenyl] Echilidene] Bisphenol; α, α', α "-Tris (4) -Hydroxyphenyl) -1,3,5-triisopropylbenzene; 1- [α-methyl-α- (4'-hydroxyphenyl) ethyl] -4- [α', α'-bis (4 "-hydroxyphenyl) ) Ethyl] benzene; a compound having three or more functional groups such as fluoroglycin, trimellitic acid, and isatinbis (o-cresol). Of the above, it is preferable to use 1,1,1-tris (4-hydroxyphenyl) ethane from the viewpoint of availability, reactivity and economy.

Each of these branching agents may be used alone, or two or more thereof may be mixed and used. When 1,1,1-tris (4-hydroxyphenyl) ethane is used as the branching agent, the amount used may be 0.2 to 2.0 mol% with respect to the dihydric phenol compound. It is preferably 0.3 to 2.0 mol%, more preferably 0.4 to 1.9 mol%. If it is 0.2 mol% or more, the degree of freedom of compounding is widened, and if it is 2.0 mol% or less, it is difficult to gel during polymerization and the aromatic polycarbonate resin can be easily produced.

The branched aromatic polycarbonate resin has a branched nuclear structure derived from the branching agent represented by the above general formula (I), and is specifically represented by the following formula.

Here, in the above formula, a, b and c are integers, and PC indicates a polycarbonate portion.

PC indicates a repeating unit represented by the following formula, for example, when bisphenol A is used as a raw material component.

The amount (ratio) of the branched aromatic polycarbonate resin in 100 parts by mass of the aromatic polycarbonate resin is preferably 10 to 100 parts by mass, more preferably 50 to 100 parts by mass. If the amount of the branched aromatic polycarbonate resin is not 10 parts by mass or more, for example, the thin-walled flame-retardant effect may not be obtained.

(Non-branched polycarbonate resin)
The aromatic polycarbonate resin may contain a non-branched polycarbonate resin containing no halogen in the molecular structure. The non-branched polycarbonate resin is preferably a polymer having a structural unit represented by the following formula (II).

In formula (II), X is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (for example, a methyl group, an ethyl group, a propyl group, an n-butyl group, an isobutyl group, an amyl group, an isoamyl group, a hexyl group and the like. ), And when there are a plurality of Xs, they may be the same or different, and a and b are integers of 1 to 4, respectively. And Y is a single bond, an alkylene group having 1 to 8 carbon atoms or an alkylidene group having 2 to 8 carbon atoms (for example, a methylene group, an ethylene group, a propylene group, a butylene group, a penterylene group, a hexylene group, an ethylidene group and an isopropi). (Lidene group, etc.), cycloalkylene group having 5 to 15 carbon atoms or cycloalkylidene group having 5 to 15 carbon atoms (for example, cyclopentylene group, cyclohexylene group, cyclopentylidene group, cyclohexylidene group, etc.), or- The S-, -SO-, -SO _2- , -O-, -CO- bond or the bond represented by the following formula (III) or (III') is shown. Of these, X is preferably a hydrogen atom, and Y is preferably an ethylene group or a propylene group.

This aromatic polycarbonate resin can be easily produced by reacting a divalent phenol represented by the following formula (IV) with a phosgene or a carbonic acid diester compound. That is, for example, in the presence of a known acid acceptor or viscosity average molecular weight modifier in a solvent such as methylene chloride, by reaction of dihydric phenol with a carbonate precursor such as phosgene, or divalent phenol and diphenyl carbonate. It is produced by a transesterification reaction with a carbonate precursor such as.

In formula (IV), X, Y, a and b are the same as described above.

Here, there are various divalent phenols represented by the above formula (IV). For example, bis (4-hydroxyphenyl) methane; bis (4-hydroxyphenyl) phenylmethane; bis (4-hydroxyphenyl) naphthylmethane; bis (4-hydroxyphenyl)-(4-isopropylphenyl) methane; bis (3). , 5-Dichloro-4-hydroxyphenyl) methane; bis (3,5-dimethyl-4-hydroxyphenyl) methane; 1,1-bis (4-hydroxyphenyl) ethane; 1-naphthyl-1,1-bis (1,1-bis) 4-Hydrenylphenyl) ethane; 1-phenyl-1,1-bis (4-hydroxyphenyl) ethane; 1,2-bis (4-hydroxyphenyl) ethane; 2,2-bis (4-hydroxyphenyl) propane [ Common name: Bisphenol A]; 2-Methyl-1,1-bis (4-hydroxyphenyl) propane; 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) propane; 1-ethyl-1,1- Bis (4-hydroxyphenyl) propane; 2,2-bis (3-methyl-4-hydroxyphenyl) propane; 1,1-bis (4-hydroxyphenyl) butane; 2,2-bis (4-hydroxyphenyl) Butane; 1,4-bis (4-hydroxyphenyl) butane; 2,2-bis (4-hydroxyphenyl) pentane; 4-methyl-2,2-bis (4-hydroxyphenyl) pentane; 2,2-bis (4-Hydroxyphenyl) hexane; 4,4-bis (4-hydroxyphenyl) heptane; 2,2-bis (4-hydroxyphenyl) nonane; 1,10-bis (4-hydroxyphenyl) decane; 1,1 -Dihydroxydiaryl alkanes such as bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane; 1,1-bis (4-hydroxyphenyl) cyclohexane; 1,1-bis (4-hydroxyphenyl) cyclodecane Dihydroxydiarylcycloalkans such as bis (4-hydroxyphenyl) sulfone; dihydroxydiarylsulfones such as bis (3,5-dimethyl-4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) ether; bis (3) , 5-Dimethyl-4-hydroxyphenyl) Dihydroxydiaryl ethers such as ether, 4,4'-dihydroxybenzophenone; 3,3', 5,5'-tetramethyl-4,4'-dihydroxybenzophenone and the like. Ketones, bis (4-hydroxyphenyl) ) Sulfides; bis (3-methyl-4-hydroxyphenyl) sulfides; dihydroxydiaryl sulfides such as bis (3,5-dimethyl-4-hydroxyphenyl) sulfides, dihydroxydiaryl sulfoxides such as bis (4-hydroxyphenyl) sulfoxides. Species, dihydroxydiphenyls such as 4,4'-dihiroxidiphenyl, dihydroxyarylfluorenes such as 9,9-bis (4-hydroxyphenyl) fluorene and the like. Among these, 2,2-bis (4-hydroxyphenyl) propane [commonly known as bisphenol A] is suitable.

Examples of the dihydric phenol other than the dihydric phenol represented by the above formula (IV) include dihydroxybenzenes such as hydroquinone, resorcinol and methylhydroquinone, 1,5-dihydroxynaphthalene; and dihydroxynaphthalene such as 2,6-dihydroxynaphthalene. Kind and the like. These divalent phenols may be used alone or in combination of two or more. Examples of the carbonic acid diester compound include diaryl carbonates such as diphenyl carbonate and dialkyl carbonates such as dimethyl carbonate and diethyl carbonate.

As the molecular weight adjusting agent, those usually used for the polymerization of polycarbonate may be used, and various ones can be used. Specifically, examples of the monovalent phenol include phenol, p-cresol, p-tert-butylphenol, p-tert-octylphenol, p-cumylphenol, nonylphenol and the like. Further, the aromatic polycarbonate used in the present invention may be a mixture of two or more kinds of aromatic polycarbonates. From the viewpoint of mechanical strength and moldability, the aromatic polycarbonate preferably has a viscosity average molecular weight of 10,000 to 100,000, and particularly preferably 20,000 to 40,000. ..

(Aromatic Polycarbonate-Polyorganosiloxane Copolymer)
The aromatic polycarbonate resin contained in the transmissive resin composition of the first embodiment according to the present technique may contain an aromatic polycarbonate-polyorganosiloxane copolymer.

The aromatic polycarbonate-polyorganosiloxane copolymer comprises an aromatic polycarbonate portion and a polyorganosiloxane moiety, and is an aromatic polycarbonate structural unit represented by the following general formula (V) and a poly represented by the general formula (VI). It contains an organosiloxane structural unit.

In the above formula (V), R ⁵ and R ⁶ represent a halogen atom and a phenyl group which may have an alkyl group or a substituent having 1 to 6 carbon atoms (preferably 1 to 4 carbon atoms), respectively, and R When there are a plurality of ⁵ and R ⁶ , they may be the same or different from each other. Y is a single bond, an alkylene group or an alkylidene group having 1 to 20 carbon atoms (preferably 2 to 10 carbon atoms), a cycloalkylene group or a cycloalkylidene group having 5 to 20 carbon atoms (preferably 5 to 12 carbon atoms), and-. It indicates either O-, -S-, -SO-, -SO2- or -CO-, and is preferably an isopropylidene group. p and q are integers of 0 to 4 (preferably 0), respectively, and when there are a plurality of p and q, they may be the same or different from each other. m represents an integer of 1 to 100 (preferably an integer of 5 to 90). When m is 1 to 100, an appropriate viscosity average molecular weight can be obtained in the aromatic polycarbonate-polyorganosiloxane copolymer.

In the above formula (VI), R ⁷ to R ¹⁰ represent phenyl groups which may have an alkyl group or a substituent having 1 to 6 carbon atoms, respectively, and they may be the same or different from each other. Specific examples of R ⁷ to R ¹⁰ include alkyl groups such as methyl group, ethyl group, propyl group, n-butyl group, isobutyl group, amyl group, isoamyl group and hexyl group, phenyl group, tolyl group, xylyl group and Phenyl-based aryls such as naphthyl groups can be mentioned. R ¹¹ represents an organic residue containing an aliphatic or aromatic substance, and is preferably a divalent organic compound residue such as an o-allylphenol residue, a p-hydroxystyrene residue and an eugenol residue.

In the above method for producing an aromatic polycarbonate-polyorganosiloxane copolymer, for example, an aromatic polycarbonate oligomer and a polyorganosiloxane having a reactive group at the terminal constituting the polyorganosiloxane portion are used as a solvent such as methylene chloride. It can be produced by dissolving it, using a catalyst such as triethylamine, adding a divalent phenol such as bisphenol A, and conducting an interfacial polycondensation reaction. The aromatic polycarbonate-polyorganosiloxane copolymer is, for example, JP-A-3-292359, JP-A-4-202465, JP-A-8-81620, JP-A-8-302178, and JP-A-10. -It is disclosed in Japanese Patent Publication No. 7897.

The degree of polymerization of the aromatic polycarbonate structural unit of the aromatic polycarbonate-polyorganosiloxane copolymer is preferably about 3 to 100, and the degree of polymerization of the polyorganosiloxane structural unit is preferably about 2 to 500, more preferably about 2 to 300. , And more preferably about 2 to 140 is used. The content of polyorganosiloxane in the aromatic polycarbonate-polyorganosiloxane copolymer is usually in the range of about 0.1 to 10% by mass, preferably in the range of 0.3 to 6% by mass. The viscosity average molecular weight of the aromatic polycarbonate-polyorganosiloxane copolymer used in the transmissive resin composition of the first embodiment according to the present technique is usually about 5,000 to 100,000, preferably 10,000 to 10,000. It is 30,000, particularly preferably 12,000 to 30,000. Here, these viscosity average molecular weights (Mv) can be obtained in the same manner as in the above-mentioned polycarbonate resin.

(Recycled polycarbonate resin)
The aromatic polycarbonate resin shown above may be a newly manufactured virgin material, waste material, scrap material, sprue material, scraps, etc. generated in the manufacturing process, or a product (for example, a digital versatile disc (DVD)). It may be a recovered material (recycled polycarbonate resin) of an optical disc (board) such as a compact disc (CD), MO, MD, or a Blu-ray disc (BD). The recycled polycarbonate resin is preferably a recycled polycarbonate resin recovered from the market.

That is, the aromatic polycarbonate resin may contain a recycled polycarbonate resin or may be composed of a recycled polycarbonate resin. The content of the recycled polycarbonate resin is preferably less than 1 to 100% by mass with respect to the total mass of the aromatic polycarbonate resin.

When the recovered optical disc is used, there are various deposits such as a metal reflective layer, a plating layer, a recording material layer, an adhesive layer, and a label, but in the present invention, these may be used as they are. , Such impurities and auxiliary materials may be separated and removed by a conventionally known method.

Specifically, metal reflective layers such as Al, Au, Ag, and Si, organic dyes containing cyanine dyes, Te, Se, S, Ge, In, Sb, Fe, Tb, Co, Ag, Ce, Bi, etc. Recording material layer, acrylic acrylate, ether acrylate, vinyl monomer or oligomer, adhesive layer consisting of at least one polymer, ultraviolet curable monomer, oligomer, at least one polymer, polymerization initiator or pigment, Examples thereof include a label ink layer in which an auxiliary agent is mixed, but the present invention is not limited to these, and may include a film-forming material and a coating material usually used in an optical disk. From the viewpoint of recycling, it is desirable that the raw material is low in cost, so it is preferable to reuse the resin while containing impurities due to various materials. For example, an optical disc can be finely crushed and used as it is, or it can be kneaded and melted with a predetermined additive to be pelletized and used as a raw material for PC resin. Alternatively, depending on the structure of the injection molding machine, the recovery disc may be directly put into the hopper or the like of the injection molding machine together with various additives described later to obtain a molded body made of a resin composition. When a polycarbonate (PC) resin that does not contain the above-mentioned various impurities is used, the deposits such as the metal reflective layer, the recording material layer, the adhesive layer, the surface hardened layer, and the label may be used, for example. It can be removed by the mechanical or chemical method proposed in JP-A-6-223416, JP-A-10-269634, JP-A-10-249315 and the like.

The weight average molecular weight of the aromatic polycarbonate resin can be measured by GPC (Gel Permeation Chromatography) measurement using a chloroform solvent in terms of polystyrene based on a polystyrene molecular weight standard substance (sample).

The molecular weight of the aromatic polycarbonate resin may be any value, but the molecular weight is preferably 36000 to 63000 in terms of weight average molecular weight (in terms of polystyrene). The reason is that when the weight average molecular weight of the aromatic polycarbonate resin is larger than 63000, the flowability (processability) of the final target resin composition at the time of melting may tend to deteriorate. On the other hand, if it is smaller than 36000, the solvent resistance may be lowered and solvent cracks (cracks due to chemicals) may be more likely to occur, and the impact resistance may be lowered.

The aromatic polycarbonate resin contained in the resin composition preferably has a weight average molecular weight of 40,000 to 59000, more preferably 44,000 to 54,000, from the viewpoint of mechanical strength and moldability.

[2-3. Polyurethane resin]
The resin composition of the first embodiment according to the present technique contains a polyurethane resin of a cured resin having a crosslinked structure in an amount of 0.01 to 5.0 parts by mass with respect to 100 parts by mass of an aromatic polycarbonate resin. The polyurethane resin having a crosslinked structure will be described in detail below.

In the resin composition of the first embodiment according to the present technology, the polyurethane resin is not particularly limited as long as it is a cured resin polyurethane resin having a crosslinked structure, but it is excellent in surface physical properties such as chemical resistance. From the viewpoint of forming a coating film, a polyurethane resin having a crosslinked structure in which a polyester polyol and a polyisocyanate are reacted and crosslinked three-dimensionally is preferable. The mass ratio of the polyester polyol to be reacted and the polyisocyanate may be any ratio, but is preferably 100:50 to 100:200. Further, the polyurethane resin preferably contains a constituent unit derived from a polyester polyol and a constituent unit derived from a polyisocyanate.

A polyurethane resin having a crosslinked structure can be obtained, for example, by mixing two liquids of a polyester polyol and a polyisocyanate and then subjecting them to a thermosetting reaction. Using a pellet-shaped aromatic polycarbonate resin, the two liquids of polyester polyol and polyisocyanate are mixed and heated in the range of 60 to 200 ° C. for several seconds to 10 minutes to obtain the pellet surface of the aromatic polycarbonate resin. Can form a coating film of polyurethane resin. Then, for example, by kneading with a twin-screw extruder, the resin composition of the first embodiment according to the present technique can be produced, which comprises an aromatic polycarbonate resin and a polyurethane having a crosslinked structure.

The present technology can also be obtained by applying a two-component mixture of a polyester polyol and a polyisocyanate on a color plate made of an aromatic polycarbonate resin, and then crushing and reselling a resin composition coated with a polyurethane resin prepared by heating. The resin composition of the first embodiment according to the above can be produced.

The details of the method for producing the resin composition of the first embodiment according to the present technology will be described later.

On the other hand, the coated product obtained by coating the polyurethane resin with the carbonate resin (for example, aromatic carbonate resin) is not particularly limited, and a conventionally known method may be used. For example, a method may be used in which a polyurethane resin is applied to a base material of a carbonate resin (for example, an aromatic carbonate resin) and then the obtained two-layer films are simultaneously baked. The method for coating may be appropriately selected from conventionally known methods in consideration of the form of the polyurethane resin to be used, the surface shape of the base material of the carbonate resin (for example, aromatic carbonate resin), and the like, and is particularly limited. It can be applied by, for example, an air spray, an airless spray, a shower, a carte coater, a bell, or other ordinary electrostatic coating. After the coating, the obtained coated product may be naturally dried or forcibly dried (for example, warm air drying, near infrared ray drying, electromagnetic wave drying, etc.). The method for baking is not particularly limited, but the baking temperature is 70 to 110 ° C. in consideration of the case where the base material of the carbonate resin (for example, aromatic carbonate resin) may be deteriorated by baking. The temperature is preferably 80 to 100 ° C., and the baking time at that time usually depends on the baking temperature and may be appropriately set in consideration of energy efficiency, but is 10 to 60 minutes. It is preferably 15 to 40 minutes, and more preferably 15 to 40 minutes.

The average particle size of the polyurethane resin powder having a crosslinked structure may be any average particle size, but is preferably 0.5 mm to 1.5 mm. When the average particle size of the polyurethane resin having a crosslinked structure is 0.5 mm to 1.5 mm, the dispersibility and mixability of the polyurethane resin become better in the aromatic polycarbonate resin. When the dispersibility and mixability of the polyurethane resin are improved, the mechanical properties of the resin composition are maintained better, while the surface physical properties (chemical resistance, etc.) and fluidity are further improved.

In the polyurethane resin having a crosslinked structure, the ratio of the polyurethane resin powder having a particle size of 0.5 mm to 1.5 mm to the total powder of the polyurethane resin may be any ratio, but is 70% or more. Is preferable. When it is 70% or more, the dispersibility and mixing property of the polyurethane resin become better in the aromatic polycarbonate resin. When the dispersibility and mixability of the polyurethane resin are improved, the mechanical properties of the resin composition are maintained better, while the surface physical properties (chemical resistance, etc.) and fluidity are further improved.

The particle size distribution of the polyurethane resin powder can be measured as follows. The low tap measurement was used for the measurement of the particle size distribution. The low-tap method is a method of sorting by the mesh of a sieve, and is a measurement method of measuring the mass of the sample remaining on each sieve and describing the cumulative distribution on the graph to obtain the average particle size distribution.

The particle size of the polyurethane resin powder having a crosslinked structure can be changed by adjusting the pulverization conditions. The polyurethane resin having a particle size of 0.5 mm to 1.5 mm at a ratio of 70% or more to the total powder of the polyurethane resin can be produced by pulverizing the polyurethane resin by a freeze pulverization method.

The mixing ratio of the polyester polyol and the polyisocyanate is such that the ratio of the number of hydroxyl groups in the polyester polyol to the number of isocyanate equivalents in the polyisocyanate (the number of hydroxyl groups in the polyester polyol component: the number of isocyanate equivalents of the polyisocyanate) is 100: 50 to 100. It is preferable to set it in the range of: 200, and it is more preferable to set it in the range of 100: 80 to 100: 180. When the equivalent number of hydroxylates in the polyester polyol is 100 and the equivalent number of isocyanates in the polyisocyanate is less than 50, the cross-linking reaction between the polyester polyol and the polyisocyanate becomes slightly insufficient, and the speed of the coating film is high. There is a possibility that the curability may be slightly lowered, or the physical properties of the coating film such as abrasion resistance, hardness, weather resistance, water resistance, solvent resistance, and chemical resistance may be slightly lowered. On the other hand, when the number of hydroxyl group equivalents in the polyester polyol is 100, if the equivalent number of isocyanates in the polyisocyanate exceeds 200, the physical properties may be slightly deteriorated due to the presence of excess polyisocyanate.

The curable polyurethane resin composition may appropriately contain a solvent for dissolving or dispersing the polyester polyol and / or the polyisocyanate. The solvent may be contained in either one of the polyester polyol and the polyisocyanate, or may be contained in both. Further, the solvent can also be used for the purpose of mixing the polyester polyol and the polyisocyanate and then diluting the mixture so as to have an appropriate viscosity. Examples of the solvent include hydrocarbon solvents such as toluene, xylene, solvent naphtha, methylcyclohexane and ethylcyclohexane; ester solvents such as ethyl acetate, butyl acetate and ethylene glycol monomethyl ether; acetone, methyl ethyl ketone and methyl isobutyl ketone. Ketone-based solvents such as diisobutylketone; and the like. The solvent may be only one kind or two or more kinds. Further, the solvent used for the polyol component and the solvent used for the polyisocyanate component may be the same or different.

The curable polyurethane resin composition may be a natural pigment, an organic synthetic pigment, a pigment, an inorganic pigment or a brilliant material (a flake-like pigment that imparts a glittering sensation or photointerference to the coating film), if necessary. It is possible to contain a coloring component such as. These coloring components may be contained in either a polyester polyol or a polyisocyanate, but are preferably contained in the polyester polyol. The coloring component may be only one kind or two or more kinds. Needless to say, the polyurethane resin having a crosslinked structure may be a clear paint that does not contain a coloring component.

Natural pigments include, for example, carotenoid pigments such as carotin, carotinal, capsanthin, lycopene, bixin, crosin, canthaxanthin, anato; anthocyanidins such as cissonin, raphanin, enocianin, carcons such as saflor yellow, benivana, etc. Flavonoid pigments such as rutin, flavonols such as quercetin, flavonoids such as cacao pigments; flavonoid pigments such as riboflavin; , Quinone-based pigments such as naphthoquinones such as alkannine and equinochrome; polyphyllin-based pigments such as chlorophyll and blood pigments; diketone-based pigments such as curcumin (turmeric); betacyanidin-based pigments such as betanin; and the like.

Examples of the organic synthetic dye or pigment include those specified in Ordinance No. 30 of the Ministry of Health and Welfare. For example, Red No. 202 (Resole Rubin BCA), Red No. 203 (Lake Red C), Red No. 204 (Lake Red CBA), Red No. 205 (Resole Red), Red No. 206 (Resole Red CA), Red No. 207 (Resole). Red BA), Red 208 (Resole Red SR), Red 219 (Brilliant Treki Red R), Red 220 (Deep Maroon), Red 221 (Truisin Red), Red 228 (Permuton Red), Orange No. 203 (Permanent Orange), Orange No. 204 (Benchjin Orange G), Yellow 205 (Benchjin Yellow G), Red No. 404 (Brilliant Fast Scarlet), Red No. 405 (Permanent Red F5R), Orange No. 401 (Daidai) Hansa Orange), Yellow No. 401 (Hanza Yellow), Blue No. 404 (Futarussin Blue) and the like.

Examples of the inorganic pigment include silicic acid anhydride, magnesium silicate, talc, kaolin, bentonite, zirconium oxide, magnesium oxide, zinc oxide, titanium oxide, light calcium carbonate, heavy calcium carbonate, light magnesium carbonate, and heavy magnesium carbonate. , Barium sulfate, yellow iron oxide, red iron oxide, black iron oxide, gunjo, chromium oxide, chromium hydroxide, carbon black, caramine and the like. Examples of the bright material include flaky aluminum, vapor-deposited aluminum, aluminum oxide, oxybismus chloride, mica, titanium oxide-coated mica, iron oxide-coated mica, mamma-like iron oxide, titanium oxide-coated silica, and titanium oxide-coated alumina. Examples thereof include iron oxide-coated silica, iron oxide-coated alumina, glass flakes, colored glass flakes, vapor-deposited glass flakes, and hologram films. The size of these bright materials is not particularly limited, but is preferably 1 to 30 μm in the longitudinal direction and 0.001 to 1 μm in thickness.

The curable polyurethane resin composition may contain other natural product-derived resins, if necessary. In that case, the other natural product-derived resin may be contained in either the polyester polyol or the polyisocyanate, but it is preferably contained in the polyester polyol. The other natural product-derived resins may be only one kind or two or more kinds.

Other natural-derived resins are not particularly limited, and are, for example, vegetable fibers, cellulose resins, polyhydroxycarboxylic acids typified by polylactic acid, polycaprolactam, modified polyvinyl alcohol, and the like, as well as polycaprolactone. Examples thereof include biodegradable aliphatic polyester. As the other natural product-derived resins, those that are soluble in the above-mentioned solvents are particularly preferable, and cellulose-derived resins are particularly preferable. For example, by containing a small amount of one or more selected from cellulose, nitrocellulose, and cellulose acetate butyrate, the physical properties such as the surface hardness of the obtained cured coating film can be further improved. As preferred commercially available products that can be used as other natural resin-derived resins, for nitrocellulose, industrial vitrified cotton "BNC-HIG-2" manufactured by French company Beljulac NC and industrial vitrified cotton manufactured by South Korea CNC company. "RS1-4", "Swancell HM1-4" manufactured by Kyosei Yoko Co., Ltd., "Celnova BTH1-4" manufactured by Asahi Kasei Chemicals Co., Ltd.), etc. "CAB381-0.1", "CAB381-0.5", "CAB381-2", "CAB531-1", "CAB551-0.01", "CAB551-0.2", etc. manufactured by Products Co., Ltd. are mentioned. Be done.

For the curable polyurethane resin composition, if necessary, a conventionally known surface conditioner (wax, anti-repellant agent, antifoaming agent, etc.), plasticizer, ultraviolet stabilizer, antioxidant, fluidity adjuster, etc. Various additives such as a drip-preventing agent, a matting agent, a polishing agent, and a preservative can be appropriately contained. These additives may be contained in either a polyester polyol or a polyisocyanate, but are preferably contained in the polyester polyol.

The polyurethane resin having a crosslinked structure is a cured product obtained by curing a curable polyurethane resin composition containing at least a polyester polyol and a polyisocyanate, and is a resin obtained by curing a polyester polyol with a polyisocyanate. The polyurethane resin having a crosslinked structure is obtained, for example, by mixing a polyester polyol and a polyisocyanate, as described above. Then, the obtained polyurethane resin having a crosslinked structure is added (dry blended) to the polycarbonate resin and then kneaded to obtain the resin composition of the first embodiment according to the present technique.

[2-4. Polyester polyol]
A polyester polyol which is a raw material of a polyurethane resin having a crosslinked structure will be described.

The hydroxyl value of the polyester polyol may have any value, but is preferably 30 to 300. When the hydroxyl value of the polyester polyol is less than 30, the obtained polyurethane resin may have a slightly low crosslink density, and as a result, the chemical resistance and chemical resistance of the resin composition added to and kneaded with the aromatic polycarbonate resin Abrasion resistance, weather resistance, water resistance, and solvent resistance may be slightly insufficient. On the other hand, when the hydroxyl value of the polyester polyol exceeds 300, on the contrary, the cross-linking proceeds a little too much, so that the compatibility with the aromatic polycarbonate resin is slightly deteriorated, and the mechanical properties and chemical resistance are slightly deteriorated. There is. The hydroxyl value can be obtained by measuring by the method described in JIS K-1557-1.

The weight average molecular weight of the polyester polyol may have any value, but is preferably 10,000 to 500,000. If the weight average molecular weight of the polyester polyol is less than 10,000, a polyurethane structure having a crosslinked structure may be formed, and the chemical resistance of the resin composition added to and kneaded with the polycarbonate resin may be slightly insufficient. .. On the other hand, when the weight average molecular weight of the polyester polyol exceeds 500,000, the viscosity becomes high, and when it is added to and kneaded with the polycarbonate resin, the dispersibility is slightly deteriorated, which tends to lead to deterioration of physical properties.

The polyester polyol can be produced, for example, by a method of reacting a low molecular weight polyol with a polycarboxylic acid, a method of ring-opening polymerization reaction of a cyclic ester compound such as ε-caprolactone, or the like.

Examples of low molecular weight polyols include ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and neo. Pentyl glycol, 1,8-octanediol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol (molecular weight 300-6000), dipropylene glycol, tripropylene glycol Lu, bishydroxyethoxybenzene, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, bisphenol A, hydrogenated bisphenyl A, hydroquinone and their alkylene oxide adducts, etc. are used. be able to.

Examples of the polycarboxylic acid include succinic acid, adipic acid, azelaic acid, sebacic acid, dodecandicarboxylic acid, maleic acid, fumaric acid, 1,3-cyclopentanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, and terephthalic acid. , Isophthalic acid, phthalic acid, 1,4-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, naphthalic acid, biphenyldicarboxylic acid, 1,2-bis (phenoxy) ethane-p, p'-dicarboxylic acids and their anhydrides or ester-forming derivatives can be used.

Further, the polyester polyol may be a polyester polyol obtained by using a raw material derived from vegetable oil.

The vegetable oil-derived raw material is preferably one or more selected from the group consisting of vegetable oil or its fatty acid, a carboxylic acid produced from the vegetable oil as a raw material, and a raw material having a hydroxyl group derived from the vegetable oil. Examples of vegetable oil or vegetable oil fatty acid include Chinese tung oil (fatty acid), flaxseed oil (fatty acid), dehydrated castor oil (fatty acid), tall oil fatty acid, cottonseed oil (fatty acid), soybean oil (fatty acid), olive oil (fatty acid), and saflower oil. (Fatty acid), castor oil (fatty acid) rice bran oil (fatty acid), hydrogenated coconut oil (fatty acid), coconut oil (fatty acid), palm oil (fatty acid) and the like.

Examples of the carboxylic acid produced from vegetable oil include 12-hydroxystearic acid, heptyl acid, undecylenic acid, and sebacic acid produced from castor oil; rosin purified from pine tar, and hydrogenated rosin, which is a hydride thereof. , And dimer acid produced from a dry vegetable oil fatty acid such as polymerized rosindole oil fatty acid which is a polymer thereof, and hydrogenated dimer acid which is a hydride thereof; isostearic acid produced as a by-product during the production of dimer acid; and the like. Examples of the raw material having a hydroxyl group derived from vegetable oil include heptanal, octanol, 1,10-decanediol produced from castor oil; glycerin refined from each vegetable oil; and the like.

The polyester polyol may be obtained by using the above-mentioned vegetable oil-derived raw material, and the production method thereof is not particularly limited, but is generally used, for example, in the esterification reaction with the vegetable oil-derived raw material, if necessary. It can be obtained by subjecting the acid component and / or the alcohol component to be esterified.

Examples of the acid component that can be used in obtaining the polyester polyol include benzoic acid, p-tert-butylbenzoic acid, isophthalic acid, phthalic acid anhydride, terephthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid, and azeline. Acid, sebacic acid, isosebacic acid, oxalic acid, trimellitic acid, (anhydrous) succinic acid, (anhydrous) maleic acid, fumaric acid, (anhydrous) itaconic acid, dodecanoic acid, tetrahydro (anhydrous) phthalic acid, hexahydro (anhydrous) Phthalic acid, hexahydroisophthalic acid, hexahydroterephthalic acid, tetrachloro (anhydrous) phthalic acid, hexachloro (anhydrous) phthalic acid, tetrabromo (anhydrous) phthalic acid, glutaric acid, adipic acid, pimelic acid, ubilic acid, hydrogenated phthalic acid Acids, 1,4-cyclohexanedicarboxylic acids and the like can be mentioned. The acid component may be only one kind or two or more kinds.

Examples of the alcohol component that can be used in obtaining the polyester polyol include ethylene glycol, neopentyl glycol, diethylene glycol, tetramethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 2,3,4-trimethyl-1. , 3-Pentanediol, 3-Methylpentene-1,5-diol, 1,4-Cyclohexanedimethanol, ethylene oxide or propyrenoxide of bisphenol A or hydride bisphenol A, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polybutylene Glycol, 2,2-diethyl-1,3-propanediol, 2-n-butyl-ethyl-1,3-propanediol, tricyclodecanedimethanol, cyclohexanedicarboxylic acid, cyclohexanedimethanol, cyclohexanediol and other divalents Alcohol components; trihydric alcohol components such as synthetic glycerin (not derived from vegetable oil), trimethylolpropane, trimethylolethane; and tetrahydric alcohols such as pentaerythritol; and the like. The alcohol component may be only one kind or two or more kinds.

In obtaining the polyester polyol, the amount of the vegetable oil-derived raw material used may be arbitrarily set to be 30 to 100% by mass, although the content ratio of the vegetable oil-derived raw material in the obtained polyester polyol may be arbitrary. When the content ratio of the vegetable oil-derived raw material in the polyester polyol is less than 30% by mass, the global warming prevention effect obtained by using the carbon-neutral material tends to be slightly reduced. The esterification reaction for obtaining the polyester polyol may be carried out by appropriately adopting conventionally known esterification methods and conditions.

[2-5. Polyisocyanate]
Polyisocyanate, which is a raw material for a polyurethane resin having a crosslinked structure, will be described.

The polyisocyanate preferably has at least one isocyanate group and preferably two or more isocyanate groups.

Examples of the polyisocyanate include aromatic polyisocyanates, aliphatic polyisocyanates, cyclic aliphatic polyisocyanates, alicyclic polyisocyanates, and reaction products of these polyisocyanates and polyols. Among these, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), polyphenylmethane polyisocyanate (crude MDI), modified diphenylmethane diisocyanate (modified MDI), xylylene diisocyanate (XDI), hexamethylene diisocyanate (HMDI), etc. Aromatic polyisocyanates, trimeric compounds of these polyisocyanates, reaction products of these polyisocyanates and polyols, and the like are preferable. In the resin composition of the first embodiment according to the present technique, only one kind of polyisocyanate may be used as the polyisocyanate, or two or more kinds of polyisocyanates may be used.

[2-6. Organic Sulfonic Acids and Organic Sulfonic Acid Metal Salt Compounds]
In the resin composition of the first embodiment according to the present technology, the organic sulfonic acid and / or the organic sulfonic acid metal salt compound is further added in an amount of 0.01 to 3.0 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin. It may be included. The organic sulfonic acid and the organic sulfonic acid metal salt compound will be described in detail below.

The organic sulfonic acid is not particularly limited, but is preferably an aromatic organic sulfonic acid. The organic sulfonic acid metal salt compound is not particularly limited, but is preferably an aromatic sulfonic acid metal salt compound. The aromatic sulfonic acid metal salt compound contains a sulfonic acid metal base, and the content of the sulfonic acid metal base may be appropriately adjusted and may be any amount, but is preferably 0.1 to 10 mol%. In the organic sulfonic acid and the organic sulfonic acid metal salt compound, examples of the low molecular weight compound include perfluoroalkane sulfonic acid, alkylbenzene sulfonic acid, halogenated alkylbenzene sulfonic acid, alkyl sulfonic acid, naphthalene sulfonic acid and the like, or alkali metals thereof. As the salt or alkaline earth metal salt, and as the high molecular weight compound, for example, the polymer having an aromatic ring described in Patent 4196862 and Patent 49661 contains a predetermined amount of sulfonic acid and / or a metal salt thereof. Can be mentioned. Examples of the polymer having an aromatic ring include polystyrene (PS) sulfonic acid or polystyrene (PS) sulfonic acid metal salt, high impact polystyrene (HIPS) sulfonic acid or high impact polystyrene (HIPS) sulfonic acid metal salt, or sulfonic acid. Examples thereof include styrene / acrylonitrile copolymerized resin (AS) containing a group and / or a sulfonic acid base.

As described above, there are various types of organic sulfonic acid or organic sulfonic acid metal salt compound, from low molecular weight to high molecular weight, but in general, the higher molecular weight is dispersed when kneaded with an aromatic polycarbonate resin. It is preferable because of its good properties and excellent storage stability under high temperature and high humidity conditions.

More preferably, it is a core-shell type styrene polymer having a sulfonic acid group bonded to the surface layer of the particles, an alkali metal salt thereof, an alkaline earth metal salt, or the like, and specifically, for example, polystyrene sulfonic acid or potassium thereof. There is salt. One or a plurality of these selected from these may be mixed and used in an appropriate ratio, but when polystyrene sulfonic acid or a potassium salt thereof is used, a high flame retardant effect can be obtained with a very small amount of addition. preferable. Further, the weight average molecular weight (in terms of polystyrene) thereof is preferably 30,000 or more, and more preferably 40,000 or more and 300,000 or less because the balance between solvent resistance and compatibility is further maintained.

As described above, the content of the organic sulfonic acid or the organic sulfonic acid metal salt compound is 0.01 to 3.0 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin, but is 0.05 to 1.5 parts by mass. When the amount is by mass, the flame-retardant effect is further enhanced, and when the amount is 0.05 to 1 part by mass, a stronger flame-retardant effect can be obtained, which is more preferable. If it is less than 0.05 parts by mass, it may be difficult to obtain a flame retardant effect, and if it exceeds 1.5 parts by mass, the compatibility with the aromatic polycarbonate resin may decrease, resulting in negative flame retardancy. The effect, i.e., the flame retardant level may be lower than in the case of no content.

[2-7. Drip preventive agent]
The resin composition of the first embodiment according to the present technique may further contain a drip inhibitor. The content of the drip inhibitor may be 0.8 parts by mass or less with respect to 100 parts by mass of the aromatic polycarbonate resin. When the resin composition of the first embodiment according to the present technology is used as a flame-retardant resin composition, it contains a drip inhibitor in addition to the organic sulfonic acid and the organic sulfonic acid metal salt compound (flame retardant). , The drip phenomenon at the time of combustion can be suppressed. Examples of the drip inhibitor include fluoroolefin resins and the like.

Examples of the fluoroolefin resin capable of suppressing the drip phenomenon include difluoroethylene polymers, tetrafluoroethylene polymers, tetrafluoroethylene-hexafluoropropylene copolymers, and copolymers with tetrafluoroethylene-ethylene-based monomers. It is possible to use any one or a plurality of these as a mixture.

Among these fluoroolefin resins, it is particularly preferable to use a tetrafluoroethylene polymer or the like, and the average molecular weight thereof is 50,000 or more, preferably in the range of 100,000 to 20,000,000. As the fluoroolefin resin, one having a fibril-forming ability is more preferable.

As described above, the content of the drip inhibitor such as the fluoroolefin resin may be 0.8 parts by mass or less, preferably 0.001 to 0.8 parts by mass, based on 100 parts by mass of the aromatic polycarbonate resin. , The range of 0.01 to 0.5 parts by mass is more preferable, and the range of 0.05 to 0.3 parts by mass is further preferable.

If the content of the drip inhibitor such as the fluoroolefin resin is less than 0.001 part by mass with respect to 100 parts by mass of the aromatic polycarbonate resin, it may be difficult to suppress the drip phenomenon. On the other hand, when the content of the drip inhibitor such as a fluoroolefin resin is more than 0.8 parts by mass, the molded product may be slightly whitened and the transparency may be slightly impaired.

[2-8. Other ingredients]
In addition to the above, the resin composition of the first embodiment according to the present technology has other components (other additives) such as antioxidants (hindered phenol-based, phosphorus-based, sulfur-based) and antistatic agents. Agents, UV absorbers (benzophenon-based, benzotriazole-based, hydroxyphenyltriazine-based, cyclic iminoester-based, cyanoacrylate-based), light stabilizers, plasticizers, compatibilizers, colorants (pigments, dyes), photostable It may contain an agent, a crystal nucleating agent, an antibacterial agent, a flow modifier, an infrared absorber, a phosphor, an antistatic agent, a mold release agent, a silicone-based flame retardant agent, a surface treatment agent, or the like. This improves injection moldability, impact resistance, appearance, heat resistance, weather resistance, color, rigidity, and the like. In particular, the following silicone compounds can be mentioned as silicone-based flame retardants.

The silicone compound is used to impart flame retardancy to the resin composition of the first embodiment according to the present technique. The amount of the silicone-based flame retardant added to the resin composition is preferably 0.001 to 0.02 (0.1 to 2% by mass) in terms of mass ratio with respect to the resin composition. If the amount of the silicone-based flame retardant added is less than 0.001 (0.1% by mass) in terms of mass ratio with respect to the resin composition, the effect of imparting flame retardancy to the resin composition may not be sufficient. On the other hand, if the addition amount is more than 0.02 (2% by mass), the economic efficiency may be deteriorated due to the decrease in efficiency, and the effect of imparting flame retardancy may be saturated and the efficiency may be decreased.

<3. Second Embodiment (Example of Method for Producing Resin Composition)>
[3-1. Method for manufacturing resin composition]
Hereinafter, the method for producing the resin composition of the second embodiment (example of the resin composition) according to the present technique will be described in detail.

In the method for producing a resin composition of the second embodiment (example of resin composition) according to the present technology, 0.01 to 5.0 parts by weight of a polyurethane resin having a crosslinked structure is added to 100 parts by mass of an aromatic polycarbonate resin. It is a method for producing a resin composition, which comprises adding and kneading an aromatic polycarbonate resin and a polyurethane resin having a crosslinked structure. The polyurethane resin having a crosslinked structure is preferably a curable resin, and may be a photocurable resin or a thermosetting resin. Regarding the aromatic polycarbonate resin and the polyurethane resin having a crosslinked structure used in the method for producing the resin composition of the second embodiment according to the present technology, the first implementation according to the present technology is made except for the following. The contents of the aromatic polycarbonate resin and the polyurethane resin having a crosslinked structure contained in the resin composition of the embodiment are the aromatic polycarbonate resin and the crosslinked structure used in the method for producing the resin composition of the second embodiment according to the present technology. It can be applied as it is to a polyurethane resin having.

According to the resin composition produced by the method for producing a resin composition according to the second embodiment of the present technology, fluidity and solvent resistance are maintained while maintaining the performance of mechanical physical properties such as impact resistance. Surface physical properties such as chemical resistance and scratch resistance can be improved. The improvement in fluidity improves the processability of the resin composition.

The amount of the polyurethane resin having a crosslinked structure added to 100 parts by mass of the aromatic polycarbonate resin is 0.01 to 5.0 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin, but the mechanical properties are further improved. From the viewpoint of improvement, it is preferably 0.05 to 3.0 parts by mass.

The method for producing the resin composition of the second embodiment according to the present technique is as follows, for example.
Depending on the needs of 100 parts by mass of the aromatic polycarbonate resin component, 0.01 to 5.0 parts by mass of the polyurethane resin component having a crosslinked structure, and the use of the resin composition, <2. Each component of the organic sulfonic acid and / or the organic sulfonic acid metal salt compound, the drip inhibitor, other components and / or the silicone compound described in the first embodiment (example of the resin composition)> is added in a predetermined amount. And mix. After mixing, for example, disperse substantially uniformly with a Henschel mixer or a tumbler. Then, it is melt-kneaded by a single-screw or twin-screw extruder, and the obtained strands are cut with a pelletizer to prepare pellets, and a resin composition is obtained. The resin composition produced by the method for producing the resin composition according to the second embodiment according to the present technology is not limited to the one processed into pellets, and each component is mixed (powder state or fluid state). Also includes those processed into a form (sheet shape, etc.) different from that of pellets.

A method of adding a component of a polyurethane resin having a crosslinked structure of 0.01 to 5.0 parts to a component of an aromatic polycarbonate resin of 100 parts by mass is, for example, a pellet of a resin of an aromatic polycarbonate of 100 parts by mass. A method of adding 0.01 to 5.0 parts by mass of polyurethane resin components or the like so that a coating film is formed on the surface, 0.01 on a color plate made of 100 parts by mass of aromatic polycarbonate resin. Examples thereof include a method of adding the components of the polyurethane resin in an amount of up to 5.0 parts by mass so as to coat the components. In the case of a method of adding a component of a polyurethane resin or the like to a color plate made of an aromatic polycarbonate resin so as to coat it, it may be necessary to crush and repellet the obtained resin composition after the coating. ..

The method for producing a resin composition according to the second embodiment according to the present technique preferably comprises reacting a polyester polyol with a polyisocyanate to produce a polyurethane resin having a crosslinked structure. A method for producing a polyurethane resin having a crosslinked structure by reacting a polyester polyol with a polyisocyanate is, for example, mixing two liquids of the polyester polyol and the polyisocyanate, and then performing a thermosetting reaction or photocuring. It is a manufacturing method including the above.

<4. Third Embodiment (Example of resin molded product)>
[4-1. Resin molded body]
The resin molded body of the third embodiment according to the present technique is a resin molded body obtained by molding the resin composition of the first embodiment according to the present technique. Further, the resin molded body of the third embodiment according to the present technique may be a resin molded body containing the resin composition of the first embodiment according to the present technique. The resin composition of the first embodiment according to the present technology improves processability by improving fluidity without deteriorating mechanical properties, and further improves surface physical properties such as chemical resistance. Therefore, OA It is possible to obtain a resin molded body suitable for equipment / copying machines, in-vehicle use, and medical use.

[4-2. Manufacturing method of resin molded product]
The resin molded product of the third embodiment according to the present technique can be manufactured, for example, as follows. Injection molding of pellets or the like made of the resin composition of the first embodiment according to the present technology or pellets made of the resin composition manufactured by the method for producing the resin composition of the second embodiment according to the present technology. , Injection compression molding, extrusion molding, blow molding, vacuum molding, press molding, foam molding, supercritical molding, etc. to a predetermined shape (for example, home appliances, automobiles, information equipment, office equipment, telephones, stationery, furniture Or, it can be molded into a housing or component material of various products such as fibers) to obtain a resin molded body.

This technique is not limited to each of the above embodiments, and can be changed within a range that does not deviate from the gist of this technique.

It should be noted that the effects described in the present specification are merely examples and are not limited, and other effects may be obtained.

In addition, the present technology can also have the following configurations.
[1]
It contains 100 parts by mass of an aromatic polycarbonate resin and 0.01 to 5.0 parts by mass of a polyurethane resin having a crosslinked structure.
A resin composition in which the polyurethane resin is a cured resin.
[2]
The resin composition according to [1], wherein the polyurethane resin powder having a crosslinked structure has an average particle size of 0.5 mm to 1.5 mm.
[3]
The ratio of the particle size of the polyurethane resin powder having the crosslinked structure to the total powder of the polyurethane resin having the crosslinked structure being 0.5 mm to 1.5 mm is 70% or more, [1] or The resin composition according to [2].
[4]
The resin composition according to any one of [1] to [3], wherein the polyurethane resin having a crosslinked structure is obtained from a reaction between a polyester polyol and a polyisocyanate.
[5]
The resin composition according to [4], wherein the mass ratio of the polyester polyol to the polyisocyanate is 100: 50 to 100: 200.
[6]
The resin composition according to [4] or [5], wherein the polyester polyol has a hydroxyl value of 30 to 300.
[7]
The resin composition according to any one of [4] to [6], wherein the polyester polyol has a polystyrene-equivalent weight average molecular weight of 10,000 or more and 500,000 or less.
[8]
The resin composition according to any one of [4] to [7], wherein the polyisocyanate has two or more isocyanate groups.
[9]
One of [1] to [8] further containing 0.01 to 3.0 parts by mass of an organic sulfonic acid and / or an organic sulfonic acid metal salt compound with respect to 100 parts by mass of the aromatic polycarbonate resin. The resin composition described.
[10]
The resin composition according to [9], wherein the polystyrene-equivalent weight average molecular weight of the organic sulfonic acid metal salt compound is 30,000 or more.
[11]
The resin composition according to [9] or [10], wherein the organic sulfonic acid metal salt compound contains a sulfonic acid metal base, and the content of the sulfonic acid metal base is 0.1 to 10 mol%.
[12]
[1] to [11], wherein the aromatic polycarbonate resin contains a regenerated polycarbonate resin, and the content of the regenerated polycarbonate resin is less than 1 to 100% by mass with respect to the total mass of the aromatic polycarbonate resin. The resin composition according to any one.
[13]
0.01 to 5.0 parts by weight of the polyurethane resin having a crosslinked structure is added to 100 parts by mass of the aromatic polycarbonate resin, and the aromatic polycarbonate resin and the polyurethane resin having the crosslinked structure are kneaded. The resin composition according to any one of [1] to [12], which is obtained.
[14]
To add 0.01 to 5.0 parts by weight of a polyurethane resin having a crosslinked structure to 100 parts by mass of an aromatic polycarbonate resin,
A method for producing a resin composition, which comprises kneading the aromatic polycarbonate resin and a polyurethane resin having a crosslinked structure.
[15]
The method for producing a resin composition according to [14], which comprises reacting a polyester polyol with a polyisocyanate to produce a polyurethane resin having the crosslinked structure.

Hereinafter, the effects of this technique will be specifically described with reference to examples. The scope of the present technology is not limited to the examples.

Resin compositions according to Examples 1-1 to 1-10 and Examples 2-1 to 2-10, and resin compositions according to Comparative Examples 1-1 to 1-5 and Comparative Examples 2-1 to 2-4. Was prepared, and each resin composition was evaluated. In addition, Comparative Example 1-5 was a coated product, and was manufactured as follows.
In Comparative Example 1-5 (coated product), the coating material was coated on the surface of the base material by a roll coater method, a spray method, or a dipping method. After coating, a desired coating film was formed on the surface of the substrate by heating and drying in the range of 60 to 120 ° C. for several seconds to 10 minutes, if necessary. The coating material is a polyester polyol (Plaxel PCL305 (manufactured by Daicel Chemical Industry Co., Ltd.)) component and a polyisocyanate-based curing agent (Duranate TPA-100 (manufactured by Asahi Kasei Kogyo Co., Ltd.)) having an isocyanate equivalent number of 100: 100. These were combined to form a two-component curable paint composition.

The composition (parts by mass) of each component of the resin composition of Examples 1-1 to 1-10 and the evaluation results of fluidity (g / 10min), tensile strength (%), chemical resistance and bending strength are as follows. It is shown in Table 1. Further, the composition (parts by mass) of each component of the resin composition of Comparative Examples 1-1 to 1-5, and the evaluation results of fluidity (g / 10 min), tensile strength (%), chemical resistance and bending strength. Is shown in Table 2 below.

The composition (parts by mass) of each component of the resin composition of Examples 2-1 to 2-10, fluidity (g / 10 min), tensile strength (%), chemical resistance, and flame retardancy (UL94, 1. 6 mm) and the evaluation results of bending strength are shown in Table 3 below. Further, the composition (parts by mass) of each component of the resin composition of Comparative Examples 2-1 to 2-4, fluidity (g / 10 min), tensile strength (%), chemical resistance, and flame retardancy (UL94, The evaluation results of 1.6 mm) and bending strength are shown in Table 4 below.

[Resin compositions according to Examples 1-1 to 1-10 and Examples 2-1 to 2-10, and resin compositions according to Comparative Examples 1-1 to 1-5 and 2-1 to 2-4. Constitution]
Contained in the resin compositions according to Examples 1-1 to 1-10 and Examples 2-1 to 2-10, and the resin compositions according to Comparative Examples 1-1 to 1-5 and 2-1 to 2-4. Each component to be made will be described. In addition, each component (component A, component B, component C, component D, component E, and component F) is the aromatic polycarbonate resin and crosslinked resin described in the resin composition of the first embodiment according to the present technology. Corresponds to each of structural polyurethane resins, polyester polyols, polyisocyanates, organic sulfonic acids and / or organic sulfonic acid metal salt compounds, and drip inhibitors.

(Component A: Aromatic polycarbonate resin)
The following components A-1 to A-4 were used as the aromatic polycarbonate resin as the component A.

A-1: Commercially available medium molecular weight PC resin (L-1225L: Teijin Chemicals, PS equivalent Mw45000).
A-2: Commercially available low molecular weight PC resin (L-1225LLL: Teijin Chemicals, PS equivalent Mw33000).
-A-3: PC resin (PS-equivalent Mw: 46000) in which a used building material sheet is roughly crushed, melted and kneaded by a twin-screw extruder, and then pelletized.
-A-4: A coating film (recording material layer, label, adhesive layer, hardened layer, metal reflective layer, etc.) is formed by treating a used CD that has been crushed (2 to 20 mm) with an alkaline hot aqueous solution. A PC resin (PS-equivalent Mw: 32000) that was removed, melted and kneaded with a twin-screw extruder, and then pelletized.

(B component: polyurethane resin having a crosslinked structure)
As the polyurethane resin having a crosslinked structure which is a component B, the following components B-1 to B-3 which are thermosetting resins were used. The C-1 component and D-1 component used in the B-3 component are shown below.

-B-1: Neolabasan N781 (manufactured by Musashi Paint Co., Ltd.).
-B-2: Neolaba Sunsoft NS781 (manufactured by Musashi Paint Co., Ltd.).
B-3: C-1 and D-1 have a crosslinked structure formed by mixing 100 parts by mass: 100 parts by mass (C-1: D-1) and then heating at 80 ° C. for 10 minutes to react. Polyurethane resin.

(C component: polyester polyol)
The following C-1 component was used as the polyester polyol which is the C component.

-C-1: Praxel PCL305 (manufactured by Daicel Chemical Industries, Ltd.).

(D component: polyisocyanate)
As the polyisocyanate which is the D component, the following D-1 component was used.

-D-1: Duranate TPA-100 (manufactured by Asahi Kasei Kogyo Co., Ltd.).

(Component E: organic sulfonic acid and organic sulfonic acid metal salt compound)
The following components E-1 to E-2 were used as the organic sulfonic acid and the organic sulfonic acid metal salt compound as the E component.

-E-1: Organic sulfonic acid metal salt compound, in which potassium sulfonic acid salt is introduced into the surface layer of polystyrene (manufactured by Sony Corporation: PSS-K).
-E-2: Organic sulfonic acid, sulfonic acid introduced into the surface layer of polystyrene (manufactured by Sony Corporation: PSS-H).

(F component: drip inhibitor)
The following F-1 component was used as the D-drip inhibitor which is the F component.
F-1: Commercially available PTFE (manufactured by Daikin Industries, Ltd .: Polyflon FA500H) as polytetrafluoroethylene having a fibril-forming ability.

[Resin compositions according to Examples 1-1 to 1-10 and Examples 2-1 to 2-10, and resin compositions according to Comparative Examples 1-1 to 1-5 and 2-1 to 2-4. Molding]
Table 1 (implementation) shows the various components shown above (components A-1 to A-4, components B-1 to B-3, components E-1 to E-2, and components F-1). Examples 1-1 to 1-10), Table 2 (Comparative Examples 1-1 to 1-5), Table 3 (Examples 2-1 to 2-10) and Table 4 (Comparative Example 2). After blending with each blending ratio shown in -1 to Comparative Example 2-4) and blending with a tumbler, a twin-screw co-rotating mixed extruder (manufactured by Toyo Seiki Seisakusho: Labplast Mill, twin-screw) Pellets were obtained by melt-kneading using an extrusion unit). The extrusion conditions were a discharge rate of 4 kg / h, a screw rotation speed of 48 rpm, and an extrusion temperature of 270 ° C. from the first supply port to the die portion. The obtained pellets are dried at 120 ° C. for 8 hours in a hot air circulation type dryer, and then used in the test method shown below at a cylinder temperature of 290 ° C. and a mold temperature of 70 ° C. using an injection molding machine. The test piece was molded.

Next, according to the following test method, the fluidity (g / 10min), tensile strength (%), chemical resistance and flame retardancy were evaluated using the test piece prepared above.

[Test method for fluidity (g / 10min) (MFR: melt flow rate)]
According to JIS K7210, the flowability of the resin composition at the time of melting was measured under the conditions of a resin temperature of 280 ° C. and a load of 2.16 kg. The evaluation results of the fluidity (g / 10min) are shown in Tables 1 to 4 below.

[Test method for tensile strength (%)]
The test piece was subjected to a tensile test according to the JIS K7162 method, and the tensile strength was measured. The evaluation results of the tensile strength (%) are shown in Tables 1 to 4 below.

[Chemical resistance test method]
After applying 1% strain using the test piece by the 3-point bending test method, cover with a cloth impregnated with sunscreen cream: Sunplay Super Block d (manufactured by Rohto Pharmaceutical Co., Ltd.) and at 23 ° C. After leaving it for 72 hours, it was confirmed whether or not there was a change in appearance. The evaluation results of chemical resistance are shown in Tables 1 to 4 below. The evaluation was carried out according to the following criteria.

(Evaluation criteria for chemical resistance)
◯: No change in appearance is seen.
Δ: Fine cracks are observed.
×: Large cracks that lead to breakage are seen.

[Flame retardant test method]
A vertical combustion test of UL standard 94 was performed with a thickness of 1.6 mm, the grade was evaluated, and V-1 or higher was judged to be good. The UL94V standard and judgment criteria are shown in Table 5 below. The evaluation results of flame retardancy are shown in Tables 3 to 4 below. The UL94V standard and the judgment criteria are shown in Table 5 below.

[Bending strength test method]
The bending test is a kind of test for qualitatively evaluating impact resistance by bending a prepared test piece (length 110 mm, width 13 mm, thickness 1.0 mm) and measuring the fracture angle. In this evaluation, when the fracture angle is 90 ° C or more, it is evaluated as ◯, and when it is within 90 ° C, it is evaluated as ×.

Table 1 below shows the results of Examples 1-1 to 1-10, and Table 2 shows the results of Comparative Examples 1-1 to 1-5.

As is clear from Tables 1 and 2, the resin compositions according to Examples 1-1 to 1-10 were compatible with thin-walled molded products. Further, the resin compositions according to Examples 1-1 to 1-10 have moldability (fluidity) and mechanical properties (tensile strength and tensile strength) as compared with the resin compositions according to Comparative Examples 1-1 to 1-5. It was a resin composition having excellent bending strength) and surface physical characteristics (chemical resistance).

Comparing Examples and Comparative Examples with the same molecular weight of the aromatic polycarbonate resin, that is, comparison of Examples 1-1 to 1-3, Examples 1-7 to 1-8, and Comparative Example 1-1, Examples. When the comparison of 1-4 and Comparative Example 1-2, the comparison of Examples 1-5 and Comparative Example 1-3, and the comparison of Examples 1-6 and Comparative Example 1-4 are compared, the examples are compared with the comparative examples. The mechanical properties (tensile strength and bending strength) were almost the same, but the fluidity and surface physical properties (chemical resistance) were excellent.

Examples 1-1 to 1-10 and Comparative Example 1-5 were compared. Comparative Example 1-5 is a coated product obtained by coating a polyurethane resin with a carbonate resin for the purpose of improving chemical resistance. The resin compositions according to Examples 1-1 to 1-10 have surface physical characteristics (resistance to bending) without deteriorating mechanical properties (tensile strength and bending strength) with respect to the resin compositions according to Comparative Example 1-5. It was excellent because it could be given chemical properties). Further, the resin compositions according to Examples 1-1 to 1-10 were also very excellent in that the degree of freedom in molding (fluidity) was improved as compared with the resin compositions according to Comparative Example 1-5. ..

Table 3 below shows the results of Examples 2-1 to 2-10, and Table 4 shows the results of Comparative Examples 2-1 to 2-4.

As is clear from Tables 3 and 4, the resin compositions according to Examples 2-1 to 2-10 were compatible with thin-walled molded products. Further, the resin compositions according to Examples 2-1 to 2-10 to which an organic sulfonic acid or an organic sulfonic acid metal salt compound (flame retardant) was added are the same as the resin compositions according to Comparative Examples 2-1 to 2-4. In comparison, the resin composition was excellent in moldability (fluidity), mechanical properties (tensile strength and bending strength), surface physical properties (chemical resistance), and flame retardancy.

Claims (15)

It contains 100 parts by mass of an aromatic polycarbonate resin and 0.01 to 5.0 parts by mass of a polyurethane resin having a crosslinked structure.
A resin composition in which the polyurethane resin having a crosslinked structure is a cured resin. The resin composition according to claim 1, wherein the polyurethane resin powder having a crosslinked structure has an average particle size of 0.5 mm to 1.5 mm. The ratio of the particle size of the polyurethane resin powder having a crosslinked structure to the total powder of the polyurethane resin having a crosslinked structure of 0.5 mm to 1.5 mm is 70% or more, according to claim 1. The resin composition described. The resin composition according to claim 1, wherein the polyurethane resin having a crosslinked structure is obtained from a reaction between a polyester polyol and a polyisocyanate. The resin composition according to claim 4, wherein the mass ratio of the polyester polyol to the polyisocyanate is 100: 50 to 100: 200. The resin composition according to claim 4, wherein the polyester polyol has a hydroxyl value of 30 to 300. The resin composition according to claim 4, wherein the polyester polyol has a polystyrene-equivalent weight average molecular weight of 10,000 or more and 500,000 or less. The resin composition according to claim 4, wherein the polyisocyanate has two or more isocyanate groups. The resin composition according to claim 1, further comprising 0.01 to 3.0 parts by mass of an organic sulfonic acid and / or an organic sulfonic acid metal salt compound with respect to 100 parts by mass of the aromatic polycarbonate resin. The resin composition according to claim 9, wherein the polystyrene-equivalent weight average molecular weight of the organic sulfonic acid metal salt compound is 30,000 or more. The resin composition according to claim 9, wherein the organic sulfonic acid metal salt compound contains a metal sulfonic acid base, and the content of the metal sulfonic acid base is 0.1 to 10 mol%. The resin composition according to claim 1, wherein the aromatic polycarbonate resin contains a regenerated polycarbonate resin, and the content of the regenerated polycarbonate resin is 1 to less than 100% by mass with respect to the total mass of the aromatic polycarbonate resin. thing. 0.01 to 5.0 parts by weight of the polyurethane resin having a crosslinked structure is added to 100 parts by mass of the aromatic polycarbonate resin, and the aromatic polycarbonate resin and the polyurethane resin having the crosslinked structure are kneaded. The resin composition according to claim 1. To add 0.01 to 5.0 parts by weight of a polyurethane resin having a crosslinked structure to 100 parts by mass of an aromatic polycarbonate resin,
A method for producing a resin composition, which comprises kneading the aromatic polycarbonate resin and a polyurethane resin having a crosslinked structure. The method for producing a resin composition according to claim 14, which comprises reacting a polyester polyol with a polyisocyanate to produce a polyurethane resin having the crosslinked structure.