JP6409422B2 - Anti-glare film for insert molding and resin molded product using the same - Google Patents

Description

  The present invention relates to an antiglare film used for a touch panel display used in an information panel of an automobile including a car navigation system, a mobile phone, and a personal computer, and in particular, a fingerprint is not easily noticeable and the antiglare property and display contrast. The present invention relates to an antiglare film for insert molding that satisfies both requirements. Moreover, it is related with the resin molded product using this.

  An electronic image display device such as a touch panel display is required to have less reflection of light emitted from an external light source such as sunlight or a fluorescent lamp in order to improve the visibility. This is because when light from the outside is reflected on the surface (display surface), a front image is reflected there, making it difficult to see the internal image. Therefore, conventionally, an antiglare film has been provided on the display surface in order to reduce reflection of light from the outside. The conventional anti-glare film has a surface that is roughened by a method such as sandblasting, embossing roll, or chemical etching on the surface of the transparent base film to give a fine uneven structure on the surface, and then anti-glare treatment is performed. was there.

  Further, the most used anti-glare film at present is a spherical or amorphous inorganic or organic fine particle having a particle diameter of several μm added to an active energy ray curable resin such as a thermosetting resin or an ultraviolet curable resin. It is obtained by forming an antiglare layer (hard coat layer) dispersed and imparted with a fine relief structure on a transparent substrate film. The anti-glare film produced by this method has excellent anti-glare properties that prevent indoor fluorescent lights and viewers' images from appearing on the display surface. There was a problem that the darkness of the black color was insufficient. This is due to internal scattering due to the difference in refractive index between the active energy ray-curable resin and the fine particles, and it has been difficult to solve the problem of lowering the display contrast with the conventional method using fine particles.

  In order to reduce the display contrast in such an antiglare film, internal scattering is reduced by forming surface irregularities without using fine particles in the antiglare layer, and both antiglare and good display contrast are achieved. Technologies that make it possible have also been proposed. Specifically, when a solvent is evaporated from a solution in which at least one polymer and at least one curable resin precursor are uniformly dissolved to form an antiglare layer, a specific polymer is decomposed by spinodal under appropriate conditions. Then, the concavo-convex structure corresponding to the phase separation structure is formed by curing the curable resin precursor. That is, the surface uneven structure is formed by a droplet phase structure or a sea-island structure in which the polymer forms island-like domains in the phase separation structure.

  Moreover, in the anti-glare film of Patent Document 1, the solvent is evaporated from a solution in which two kinds of polymers and monomers of the first component and the second component that bring about phase separation by having a specific physical property difference prevent evaporation. A glare layer is formed. Here, physical property differences that cause phase separation include differences in SP value, glass transition temperature (Tg), surface tension, average molecular weight, etc., and there is a predetermined difference in any of these physical properties. Cost. Specifically, in order to develop phase separation due to the difference in SP value, the difference in SP value between the first component and the second component is set to 0.5 or more. In this case, it is said that the compatibility of both components is low, resulting in phase separation. In order to develop phase separation due to the difference in Tg, either Tg of the first component or the second component is set higher than the environmental temperature at the time of applying the solution, and the other Tg is set higher than the environmental temperature at the time of applying the solution. make low. In this case, it is said that phase separation is caused by aggregation of components having a Tg higher than the ambient temperature at the time of solution application. According to such a solution for forming an antiglare layer, the antiglare property can be exhibited without including fine particles that actively form surface irregularities.

International Publication No. 2005/073763

  However, the antiglare films of the examples specifically shown in Patent Document 1 show high antiglare properties with little reflection of light irradiated from an external light source, but the other side of the film is difficult to see. That is, when the antiglare property is too high, the display contrast is lowered and the image visibility is deteriorated. In addition, when decorating or imparting a function to the surface of a display or the like, a functional film may be integrated on the surface at the same time as molding a resin molded body such as a display cover by insert molding. However, the antiglare film defined in Patent Document 1 is not assumed to be insert-molded. Even if the anti-glare film satisfies the conditions defined in Patent Document 1, when used for insert molding, it is anti-glare. May decrease or cracks may occur in the antiglare layer. In particular, with the widespread use of touch panel displays by car navigation systems and the like, there is an increasing need for anti-glare films to reduce fingerprint stains. Not focused.

  Therefore, an object of the present invention is to form an antiglare hard coat layer with a resin composition containing two kinds of polymers having different SP values, thereby providing an appropriate antiglare property, and further, insert moldability. Another object of the present invention is to provide an anti-glare film that is also difficult to notice fingerprints.

  The present invention relates to an antiglare film for insert molding that is held in advance in a mold at the time of injection molding and integrated on the surface of a resin molded product, and includes a thermoplastic transparent substrate film and the thermoplastic transparent substrate. An anti-glare hard coat layer made of a cured product of the resin composition for an anti-glare hard coat layer laminated on one surface of the film. In one aspect of the present invention, the resin composition for an antiglare hard coat layer includes a polymer (a) and a polymer (b), and the SP value of the polymer (a) is SP of the polymer (b). The SP value of the polymer (a) is 8 or more, and the difference between the SP value of the polymer (a) and the SP value of the polymer (b) is 0.5 or more, and the polymer (a ) Is larger than the Tg of the polymer (b), the Tg of the polymer (a) is not less than the temperature of the mold, the Tg of the polymer (b) is less than the temperature of the mold, and the polymer ( The difference between the Tg of a) and the Tg of the polymer (b) is 20 ° C. or more, and the content of the polymer (a) in a total of 100 parts by mass of the polymer (a) and the polymer (b) is 1 to 30 parts by mass.

  In another aspect of the present invention, the resin composition for an antiglare hard coat layer comprises a polymer (a), a polymer (b), and an ultraviolet curable resin (c) having a (meth) acryl group. The SP value of the polymer (a) is smaller than the SP value of the polymer (b), the SP value of the polymer (a) is 8 or more, and the SP value of the polymer (a) and the polymer (b) The SP value of the polymer (a) is greater than the Tg of the polymer (b), the Tg of the polymer (a) is greater than the temperature of the mold, The Tg of (b) is less than the temperature of the mold, and the difference between the Tg of the polymer (a) and the Tg of the polymer (b) is 20 ° C. or more, and the polymer (a) and the polymer (b ) And the ultraviolet curable resin (c) in total 10 The content of the polymer (a) in the parts by weight is 1 to 30 parts by weight.

  In the present invention, the thermoplastic transparent substrate film has a two-layer structure of a polycarbonate layer and a polymethyl methacrylate layer, and the antiglare hard coat layer is formed on the polymethyl methacrylate layer. preferable.

  According to the present invention, a resin molded product provided with the antiglare film for insert molding on its surface is also provided.

  In the present invention, “XX to XX” indicating a numerical range means “XX or more and XX or less” unless otherwise specified. The “(meth) acryl group” means an acryl group or a methacryl group.

  The antiglare hard coat layer formed on the antiglare film for insert molding of the present invention contains a polymer (a) and a polymer (b) having a difference in SP value of 0.5 or more, and has an SP value of By hardening the resin composition for an antiglare hard coat layer containing a smaller polymer (a) in a specific ratio, it has an appropriate antiglare property. In addition, since the SP value of the polymer (a) having a smaller SP value is defined to be 8 or more, even if a fingerprint is attached, it is difficult to stand out. The Tg of the polymer (a) is larger than the Tg of the polymer (b), the Tg of the polymer (a) is equal to or higher than the temperature of the mold used for insert molding, the Tg of the polymer (b) is lower than the temperature of the mold, and When the difference in Tg between the polymer (a) and the polymer (b) is 20 ° C. or more, the antiglare hard coat layer is hardly cracked during insert molding, and the antiglare property is maintained even after molding.

[Anti-glare film for insert molding]
The antiglare film for insert molding of this embodiment has an antiglare hard coat layer formed on one surface of a thermoplastic transparent substrate film. In insert molding using this insert molding anti-glare film, the insert molding anti-glare film is integrated with the surface by holding the insert molding anti-glare film in the mold in advance and performing injection molding. A resin molded product is obtained. At this time, in the mold, the anti-glare film for insert molding is disposed with the thermoplastic transparent substrate film side facing the molding resin, and when the resin is injected into the mold, the anti-glare hard coat The layer is pressed against the mold.

<Thermoplastic transparent substrate film>
As the thermoplastic transparent substrate film, a film made of a polycarbonate resin or a polymethyl methacrylate resin can be preferably used. In particular, a film having a two-layer structure of a polycarbonate layer and a polymethyl methacrylate layer is preferable. In this case, it is desirable to laminate an antiglare hard coat layer on the polymethyl methacrylate layer. If it does so, the below-mentioned resin composition for glare-proof hard-coat layers can be satisfactorily wet-coated. In addition, when an acrylic resin (cured product of monomer having an acrylic group) is included as a component of the antiglare hard coat layer, since the refractive index of the antiglare hard coat layer and the polymethyl methacrylate layer is close, the interference of reflected light is uneven. Is unlikely to occur. In addition, since the materials of the methyl methacrylate layer and the antiglare hard coat layer are similar, the adhesion between the methyl methacrylate layer and the antiglare hard coat layer is excellent. On the other hand, since the polycarbonate layer has a glass transition temperature (Tg) higher than that of the polymethyl methacrylate layer, by performing decorative printing on the polycarbonate layer, ink flow is less likely to occur during insert molding. The film thickness of the thermoplastic transparent substrate film is usually 30 to 300 μm, preferably 125 to 200 μm. Moreover, it is preferable that the refractive index of a thermoplastic transparent base film is 1.49-1.59.

<Anti-glare hard coat layer>
An anti-glare hard coat layer is a layer laminated | stacked immediately on a thermoplastic transparent base film, and consists of hardened | cured material of the resin composition for anti-glare hard coat layers. The antiglare hard coat layer has irregularities on its surface, and light is reflected and diffused on the irregularities (surface diffusibility), and has a function capable of exhibiting antiglare properties. In addition, the darkness of the black color is improved, and a function of excellent display contrast is provided. In order to exhibit such a function, it is desirable that the uneven shape of the antiglare hard coat layer has a surface roughness Ra (JIS B0601-1994) of 0.04 to 0.40 μm. When the surface roughness of the antiglare hard coat layer is smaller than 0.04 μm, the antiglare property is weak, and it is difficult to prevent an indoor fluorescent lamp or an image of the viewer from being reflected on the display surface. On the other hand, when it exceeds 0.40 μm, the antiglare property becomes excessively strong, and specifically, the haze value becomes 15% or more, and the display contrast is lowered. The surface roughness Ra of the antiglare hard coat layer is controlled by adjusting the blending amount of the polymer (a) and the film thickness of the antiglare hard coat layer.

  The antiglare hard coat layer tends to have a small surface roughness Ra when the antiglare hard coat layer is thin, and a large surface roughness Ra when the antiglare hard coat layer is thick. . Therefore, in order to form an antiglare hard coat layer having a surface roughness Ra of 0.04 to 0.40 μm, it is necessary to adjust the film thickness of the antiglare hard coat layer. Specifically, the film thickness of the antiglare hard coat layer is 1 to 9 μm, preferably 2 to 8 μm, more preferably 3 to 7 μm. When the film thickness of the anti-glare hard coat layer is thinner than 1 μm, the surface roughness Ra is smaller than 0.04 μm, the anti-glare property is weak, and indoor fluorescent lamps and viewer images are reflected on the display surface. It becomes difficult to prevent. On the other hand, when the thickness is larger than 9 μm, the surface roughness Ra exceeds 0.40 μm, and the antiglare property becomes excessively strong. Specifically, the haze value becomes 15% or more, and the display contrast is lowered.

<Anti-glare hard coat layer resin composition>
The resin composition for an antiglare hard coat layer contains at least a polymer (a) and a polymer (b) having a defined SP value and Tg (glass transition temperature). Furthermore, there are those containing an ultraviolet curable resin (c) having a (meth) acryl group. As other components, a leveling agent, an ultraviolet absorber, a light stabilizer and the like may be blended. In addition, the antiglare hard coat resin composition contains a diluting solvent or the like as necessary from the viewpoint of coating properties. However, the present invention does not include fine particles that actively form irregularities. That is, the antiglare hard coat layer is well known to be composed of an ultraviolet curable resin having a (meth) acrylic group and fine particles, but the addition amount of fine particles is adjusted in order to obtain a predetermined antiglare property. Then, since the display contrast is lowered due to internal scattering caused by the difference in refractive index between the ultraviolet curable resin having a (meth) acryl group and the fine particles, it is not suitable for achieving the object of the present invention.

[SP value: solubility parameter]
The SP value is a solubility parameter (solubility parameter) and is a measure of solubility. The SP value indicates that the polarity is higher as the numerical value is larger, and the polarity is lower as the numerical value is smaller. In general, the difference between the SP values of the two components is a measure of compatibility, and the larger the difference, the less likely the two components are mixed.

  For example, the SP value of a polymer can be measured by a cloud point titration method [reference: SUH, CLARKE, J. et al. P. S. A-1, 5, 1671-1681 (1967)].

Ｖｍｌ＝Ｖ１Ｖ２／（φ１Ｖ２+φ２Ｖ１）
Ｖ１：ポリマーが溶解された良溶媒より低いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における貧溶媒の分子容
Ｖ２：ポリマーが溶解された良溶媒より低いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における良溶媒の分子容
φ１：ポリマーが溶解された良溶媒より低いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における貧溶媒の体積分率
φ２：ポリマーが溶解された良溶媒より低いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における良溶媒の体積分率
Ｖｍｈ＝Ｖ３Ｖ４／（φ３Ｖ４＋φ４Ｖ３）
Ｖ３：ポリマーが溶解された良溶媒より高いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における貧溶媒の分子容
Ｖ４：ポリマーが溶解された良溶媒より高いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における良溶媒の分子容
φ３：ポリマーが溶解された良溶媒より高いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における貧溶媒の体積分率
φ４：ポリマーが溶解された良溶媒より高いＳＰ値の貧溶媒で濁りを生じはじめた点（濁点）における良溶媒の体積分率
φｍｈ＝φ３δ３＋φ４δ４
δ３：ポリマーが溶解された良溶媒より高いＳＰ値である貧溶媒のＳＰ値
δ４：ポリマーが溶解された良溶媒より高いＳＰ値の貧溶媒で濁点を測定した良溶媒のＳＰ値 The polymer is dissolved in a good solvent having a known SP value, and turbidity titration is performed with a poor solvent having an SP value higher than that of the good solvent in which the polymer is dissolved and a poor solvent having an SP value lower than that of the good solvent in which the polymer is dissolved. Thus, the SP value of the polymer can be determined. The SP value δ of the polymer is given by

Vml = V1V2 / (φ1V2 + φ2V1)
V1: Molecular volume of the poor solvent at the point where turbidity began to occur in a poor solvent having a lower SP value than the good solvent in which the polymer was dissolved V2: Turbidity in the poor solvent having an SP value lower than that of the good solvent in which the polymer was dissolved The molecular volume of the good solvent at the point where turbidity began to occur (turbid point) φ1: Volume fraction of the poor solvent at the point where turbidity began to occur with a poor solvent having a lower SP value than the good solvent in which the polymer was dissolved (turbid point) φ2: Polymer Volume fraction of good solvent Vmh = V3V4 / (φ3V4 + φ4V3) at the point where turbidity began to occur in a poor solvent having a SP value lower than that of the good solvent in which the solution was dissolved (turbid point)
V3: Molecular volume of the poor solvent at the point where turbidity began to occur in a poor solvent having a higher SP value than the good solvent in which the polymer was dissolved (turbid point) V4: Turbidity in the poor solvent having a higher SP value than the good solvent in which the polymer was dissolved The molecular volume of the good solvent at the point where turbidity began to occur (turbid point) φ3: Volume fraction of the poor solvent at the point where turbidity began to occur in the poor solvent having a higher SP value than the good solvent in which the polymer was dissolved (turbid point) φ4: polymer Volume fraction of good solvent at the point where turbidity began to occur in a poor solvent having a higher SP value than the good solvent in which the solution was dissolved φmh = φ3δ3 + φ4δ4
δ3: SP value of the poor solvent having a higher SP value than the good solvent in which the polymer is dissolved δ4: SP value of the good solvent in which the turbid point was measured with a poor solvent having a higher SP value than the good solvent in which the polymer was dissolved

[Tg: Glass transition temperature]
The glass transition temperature (Tg) indicates an extrapolated glass transition start temperature measured by DSC (Differential Scanning Calorimetry) described in JIS K7121-1987. The extrapolated glass transition start temperature is the temperature at the intersection of a straight line obtained by extending the base line on the low temperature side to the high temperature side and a tangent line drawn at a point where the curve gradient of the changing portion is maximized during the glass transition stage.

(Polymer (a))
The polymer (a) is a component of the resin composition for an antiglare hard coat for exhibiting antiglare properties by coexisting with the polymer (b), and retains the antiglare properties during insert molding. It has a function.

  The polymer (a) has an SP value of 8 or more, is smaller than the SP value of the polymer (b), and the difference from the SP value of the polymer (b) is 0.5 or more. When the difference between the SP value of the polymer (a) and the SP value of the polymer (b) is 0.5 or more, the polymer (a) and the polymer (b) are contained in the antiglare hard coat layer resin composition. The antiglare hard coat layer having irregularities can be obtained without including fine particles that are separated and actively form irregularities in the antiglare hard coat layer. Further, when the SP value of the polymer (a) having a smaller SP value is 8 or more, even if fingerprints or the like adhere to the obtained antiglare hard coat layer, it is difficult to stand out.

  The polymer (a) has a Tg equal to or higher than the temperature of the mold used for insert molding. Even if the Tg of the polymer (a) is equal to or higher than the mold temperature, the antiglare hard coat layer is pressure-bonded to the mold during insert molding and the temperature rises to the mold temperature. The unevenness of the layer is maintained, and the antiglare property is maintained.

  In insert molding, the temperature of the mold is appropriately set in consideration of other molding conditions, but in many cases, it is maintained at about 100 ° C. The reason why the mold temperature is kept at about 100 ° C is that if the mold temperature exceeds 100 ° C, the antiglare film will be wrinkled or distorted due to the thermal history of the molded product. It is because it is easy to occur. On the other hand, if the temperature of the mold is significantly lower than 100 ° C., the resin temperature is too low during the molding process, making it difficult to form the desired shape.

  As the polymer (a), a thermoplastic resin having a weight average molecular weight of 5000 to 500,000, a polymer having a (meth) acryloyl group, or the like can be used. Examples of the thermoplastic resin include styrene resins, styrene / (meth) acrylic resins, (meth) acrylic resins, and polyester resins. Examples of the polymer having a (meth) acryloyl group include a resin obtained by polymerizing or copolymerizing a (meth) acrylic monomer, and a resin obtained by copolymerizing a (meth) acrylic monomer and another monomer having an ethylenically unsaturated double bond. , A resin obtained by reacting a (meth) acryl monomer with another monomer having an ethylenically unsaturated double bond and an epoxy group, a monomer having a (meth) acryl monomer and another ethylenically unsaturated double bond and an isocyanate group And the like.

  The polymer (a) may be in a state where a (meth) acryloyl group remains in the molecule.

  The polymer (a) may or may not have a reactive double bond such as an ethylenically unsaturated double bond. Even if heat generated by insert molding is applied, a higher Tg is preferable in order to maintain the formed unevenness. If it has a reactive double bond such as an ethylenically unsaturated double bond, it will be cross-linked by irradiating with ultraviolet rays, and the Tg will also increase. preferable.

  Although there is no restriction | limiting in particular about the upper limit temperature of Tg of a polymer (a), It is preferable that it is 200 degrees C or less. When the temperature is higher than 200 ° C., it becomes difficult to dissolve in an organic solvent, so that it tends to be difficult to handle.

  As a compounding quantity of polymer (a), when the ultraviolet curable resin (c) which has a (meth) acryl group is not included in the resin composition for anti-glare hard coat layers, polymer (a), polymer (b), The content of the polymer (a) in 100 parts by mass in total is 1 to 30 parts by mass. When the resin composition for an antiglare hard coat layer contains an ultraviolet curable resin (c) having a (meth) acrylic group, the ultraviolet curable resin having a polymer (a), a polymer (b), and a (meth) acrylic group. Content of the polymer (a) in a total of 100 mass parts with resin (c) is 1-30 mass parts. As the blending amount of the polymer (a) is larger, the unevenness of the obtained antiglare hard coat layer tends to be larger, and when it is less than 1 part by mass, the antiglare hard coat layer may be extended and the antiglare film. Since unevenness does not appear on the surface and anti-glare properties cannot be obtained, it is difficult to prevent indoor fluorescent lamps and viewer images from appearing on the display surface. On the other hand, when the blending amount of the polymer (a) is more than 30 parts by mass, the unevenness, that is, Ra becomes too large, so that the antiglare property is too strong and the visibility deteriorates.

(Polymer (b))
The polymer (b) is a component of a resin composition for an antiglare hard coat for exhibiting antiglare properties by coexisting with the polymer (b), and to a curved surface during insert molding having a curved surface shape. Also has a function that can be followed without cracks.

  The polymer (b) has an SP value larger than that of the polymer (a), and the difference is 0.5 or more. The polymer (b) has a Tg that is 20 ° C. or more lower than the Tg of the polymer (a) and lower than the temperature of the mold used for insert molding. Since the Tg of the polymer (b) is defined in this way, the antiglare hard coat layer can be kept antiglare even when the temperature is applied during insert molding, and the antiglare hard coat layer is flexible. Since the tee can be expressed, even in the insert molding process in which it is necessary to follow a curved surface or stress is applied, the molding process can be performed without generating a crack in the antiglare layer.

  As the polymer (b), a thermoplastic resin having a weight average molecular weight of 5000 to 500,000 can be used. Specific examples of the thermoplastic resin include organic acid vinyl ester resins, vinyl ether resins, polyamide (nylon 66), polyvinylidene chloride, polyvinyl alcohol, thermoplastic polyurethane resins, cellulose derivatives, silicone acrylic block copolymers, Examples thereof include acrylic-modified unsaturated dicarboxylic acid.

  The polymer (b) preferably has no reactive sites such as (meth) acrylic groups in the molecule. When it has a (meth) acryl group in the molecule, it is crosslinked with an ultraviolet curable resin (c) having a (meth) acryl group, which is the third component, and cracks are likely to occur during insert molding. May occur.

  In the present invention, since the antiglare hard coat layer does not contain fine particles that actively form irregularities, it is necessary to appropriately control the SP value (solubility parameter) of the polymer (b). The upper limit of the SP value of the polymer (b) is not specified as long as it is 0.5 or more larger than the SP value of the polymer (a), but there are many polymers with SP values exceeding 16 as general-purpose materials. Therefore, 16 or less is preferable from the viewpoint of availability.

  The Tg of the polymer (b) is below the mold temperature even in the antiglare hard coat layer in order to maintain the insert molding processability (trackability of the antiglare film to the mold), and It is important that 20 ° C. or more is maintained at a temperature lower than the Tg of the polymer (a). Therefore, it is preferable not to have a reactive double bond such as an ethylenically unsaturated double bond. When a reactive double bond such as an ethylenically unsaturated double bond is present, the polymer (b) may be cross-linked in the ultraviolet curing step when forming the antiglare hard coat layer. This is because Tg increases and insert molding processability may be impaired.

  As a compounding quantity of a polymer (b), when the ultraviolet curable resin (c) which has a (meth) acryl group is not included in the resin composition for glare-proof hard-coat layers, a polymer (a) and a polymer (b) The content of the polymer (b) in a total of 100 parts by mass is 70 to 99 parts by mass. When the amount is less than 70 parts by mass, separation from the polymer (a) becomes remarkable, and the antiglare property becomes too strong, so that the image visibility is deteriorated. On the other hand, when the content of the polymer (b) is 99 parts by mass or more, the antiglare property becomes too weak, so that reflection of external light becomes remarkable and visibility is deteriorated. Further, when the resin composition for an antiglare hard coat layer contains an ultraviolet curable resin (c) having a (meth) acryl group, the ultraviolet ray having a polymer (a), a polymer (b), and a (meth) acryl group. The content of the polymer (b) in a total of 100 parts by mass with the curable resin (c) is preferably 20 to 50 parts by mass. In this case, coexistence with the polymer (a) can form moderate irregularities in the antiglare hard coat layer, and the ultraviolet curable resin (c) can increase the hardness of the antiglare hard coat layer. .

(UV curable resin having (meth) acrylic group (c))
When the resin composition for an antiglare hard coat layer contains an ultraviolet curable resin (c) having a (meth) acryl group in addition to the polymer (a) and the polymer (b), the antiglare hard coat layer is more Can be hardened. Moreover, it exists in the tendency for weather resistance, such as solvent erosion resistance and moisture resistance, to improve by including the ultraviolet curable resin (c) which has a (meth) acryl group. At this time, the resin composition for an antiglare hard coat layer can contain a photopolymerization initiator (d) and an ultraviolet curable resin (c) / photopolymerization initiator having a (meth) acryl group. The mass ratio of (d) is preferably 1 to 45.

  The ultraviolet curable resin (c) having a (meth) acryl group is not particularly limited as long as it is cured by irradiation with ultraviolet rays having a weight average molecular weight of less than 5000, and a known one is used. be able to. Specifically, (meth) acrylic acid alkyl ester, (meth) acrylic acid (poly) ethylene glycol group-containing (meth) acrylic acid ester and the like are preferable as the monofunctional monomer. Examples of the polyfunctional monomer include ester compounds of polyhydric alcohol and (meth) acrylic acid, polyfunctional polymerizable compounds containing two or more (meth) acryloyl groups such as urethane-modified acrylate, and the like. For example, dipentaerythritol hexaacrylate, pentaerythritol triacrylate, tetramethylolmethane tetra (meth) acrylate, tetramethylolmethane tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, 1,6-hexanediol di (meth) Acquired as (meth) acrylic derivatives of polyfunctional alcohols such as acrylate, 1,6-bis (3- (meth) acryloyloxy-2-hydroxypropyloxy) hexane, or “Shikou UV-7600B” manufactured by Nippon Synthetic Chemical Co., Ltd. Possible hexafunctional urethane acrylates. Among these, since it is easy to maintain high hardness, it is possible to apply dipentaerythritol hexaacrylate, pentaerythritol triacrylate, and hexafunctional urethane acrylate available as “purple light UV-7600B” manufactured by Nippon Synthetic Chemical Co., Ltd. preferable. In the present specification, “(meth) acrylic acid” means acrylic acid or methacrylic acid. The same applies to “(meth) acryloyl group” and “(meth) acrylic resin”.

(Photopolymerization initiator (d))
The photopolymerization initiator (d) is used as an initiator for ultraviolet (UV) curing. The photopolymerization initiator may be a conventionally known photopolymerization initiator and is not particularly limited. For example, 1-hydroxycyclohexane-1-ylphenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 4 Acetophenone-based polymerization of-(methylthio) -α-morpholino-α-methylpropiophenone, 1- [4- (2-hydroxyethoxy) phenyl] -2-hydroxy-2-methyl-1-propan-1-one, etc. Initiators, benzoin, benzoin polymerization initiators such as 2,2-dimethoxy 1,2-diphenylethane-1-one, benzophenone, [4- (methylphenylthio) phenyl] phenylmethanone, 4-hydroxybenzophenone, 4 -Benzos such as phenylbenzophenone, 3,3 ', 4,4'-tetra (t-butylperoxycarbonyl) benzophenone Enon based polymerization initiator, 2-chlorothioxanthone, and the like thioxanthone type polymerization initiators such as 2,4-diethyl thioxanthone, and the like. Of these, 1-hydroxycyclohexane-1-ylphenylketone, 4- (methylthio) -α-morpholino-α-methylpropiophenone is preferably used. These photopolymerization initiators can be used alone or as a mixture. As a compounding quantity of a photoinitiator, 1-10 wt% is preferable in 100 wt% of anti-glare hard-coat layers. When the blending amount of the photopolymerization initiator is less than 1 wt%, it is not preferable because curing does not proceed even when irradiated with ultraviolet rays. On the other hand, a compounding amount exceeding 10 wt% is not preferable because it is unnecessarily large for curing.

(solvent)
Examples of the solvent (diluting solvent) that can be included in the resin composition for an antiglare hard coat layer include, for example, ketone solvents such as methyl ethyl ketone, acetone, methyl isobutyl ketone, and cyclohexanone, methanol, ethanol, propanol, isopropanol, and butanol. And alcohol solvents such as anisole, phenetol propylene glycol monomethyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether. One of these solvents may be used alone, or two or more organic solvents may be mixed and used. Moreover, when using 2 or more types of organic solvents, it is desirable for the difference of at least 1 type of SP value and the SP value of a polymer (a) to be 2 or less among the organic solvents used.

[Formation of antiglare hard coat layer]
First, a resin composition for an antiglare hard coat layer is applied on a thermoplastic transparent substrate film, and then dried or irradiated with ultraviolet rays to be cured, thereby preventing the resin composition on the thermoplastic transparent substrate film. A dazzling hard coat layer is laminated. Thereby, an antiglare film for insert molding is obtained.

  The coating method of the above antiglare hard coat resin composition is not particularly limited, and is usually performed by, for example, a roll coating method, a spin coating method, a dip coating method, a spray coating method, a bar coating method, a knife. Any known method such as a coating method, a die coating method, an ink jet method, or a gravure coating method may be employed. In application, in order to improve adhesion, pretreatment such as corona discharge treatment can be applied to the surface of the thermoplastic transparent substrate film in advance.

  When drying the coating, it is necessary that the temperature of the film be controlled below the Tg of the polymer (a). Thereby, the separation state of the polymer (a) and the polymer (b) in the resin composition for an antiglare hard coat layer is maintained, and irregularities are formed in the obtained antiglare hard cord layer. For example, it is dried for 0.01 to 60 minutes, preferably 0.1 to 5 minutes in an environment of 30 to 200 ° C., preferably 40 to 99 ° C.

When the coating film is irradiated with ultraviolet rays, as the ultraviolet ray source, for example, a high pressure mercury lamp, a halogen lamp, a xenon lamp, a nitrogen laser, an electron beam accelerator, a radioactive element or the like is used. In this case, it is preferable that the irradiation amount of ultraviolet rays is 50-5000 mJ / cm < ² > as an integrated light quantity in the wavelength of 365 nm of ultraviolet rays. When the irradiation amount is less than 50 mJ / cm ² , the coating film is not sufficiently cured, which is not preferable. On the other hand, when it exceeds 5000 mJ / cm ² , the polymer (b) may be colored, which is not preferable. Before the coating film is cured by irradiating with ultraviolet rays, the solvent can be removed and the phases can be separated in advance by drying the coating film. Drying before curing and phase separation in advance has the advantage that the solvent in the antiglare hard coat layer can be effectively removed and irregularities of a desired size can be provided.

[Resin molded product using anti-glare film for insert molding]
The anti-glare film for insert molding is integrated with the surface of the molded product at the same time as the resin is molded by insert molding. The anti-glare film for insert molding is held in the cavity in the injection mold, and the molten resin is injected into the mold, so that the anti-glare film for insert molding is integrated on the surface and anti-glare is formed on the surface. A resin molded product provided with a conductive hard coat layer can be obtained.

  The anti-glare film of the present invention and the resin molded product using the same are liquid crystal displays in electronic image devices and touch panels such as televisions, video cameras, word processors, car navigation systems, car navigation cover lens computers, mobile phones, and automobile information panels. It can be applied to various displays such as a plasma display, an organic EL (electroluminescence) display, an inorganic EL display, and an FED (field emission display).

Hereinafter, the embodiment will be described more specifically with reference to production examples, examples, and comparative examples.
<Preparation of resin composition for antiglare hard coat layer>
First, the following raw materials were prepared in order to prepare a resin composition for an antiglare hard coat layer.

[Polymer (a)]
<Production Example 1-1: Preparation of acrylic copolymer (A1)>
208.8 parts by mass of isobornyl methacrylate, 4.2 parts by mass of methyl methacrylate, 15.0 parts by mass of methacrylic acid, and 340.0 parts by mass of propylene glycol monomethyl ether were mixed. This mixed solution was added to 200 parts by mass of propylene glycol monomethyl ether heated to 110 ° C. under a nitrogen atmosphere in a 1000 ml reaction vessel equipped with a stirring blade, a nitrogen introducing tube, a cooling tube and a dropping funnel over 3 hours. The solution was dropped at a high speed and then reacted at 110 ° C. for 30 minutes. 120 parts by mass of a propylene glycol monomethyl ether solution containing 3.0 parts by mass of tertiary butyl peroxy-2-ethylhexanoate was dropped at a constant rate over 30 minutes, and then tertiary butyl peroxy-2-ethylhexa 25.5 parts by mass of a propylene glycol monomethyl ether solution containing 0.3 part by mass of noate was dropped for 30 minutes to obtain an acrylic copolymer having a weight average molecular weight of 14,800. This resin had an SP value of 9.9 and Tg of 113 ° C.

<Production Example 1-2: Preparation of unsaturated double bond-containing acrylic copolymer (A2)>
171.6 parts by mass of isobornyl methacrylate, 2.6 parts by mass of methyl methacrylate, and 9.2 parts by mass of methyl acrylic acid were mixed. This mixed solution was added to 330.0 parts by mass of propylene glycol monomethyl ether heated to 110 ° C. under a nitrogen atmosphere in a 1000 ml reaction vessel equipped with a stirring blade, a nitrogen introducing tube, a cooling tube and a dropping funnel. The solution was added dropwise at a constant rate over 3 hours at the same time as 80.0 parts by mass of a propylene glycol monomethyl ether solution containing 1.8 parts by mass of peroxy-2-ethylhexanoate, and then reacted at 110 ° C. for 30 minutes. Thereafter, a solution prepared by dissolving 0.2 parts by mass of tertiary butyl peroxy-2-ethylhexanoate in 17.0 parts by mass of propylene glycol monomethyl ether was added dropwise. Thereafter, a total amount of a solution composed of 1.4 parts by mass of tetrabutylammonium bromide, 0.1 part by mass of hydroquinone and 5.0 parts by mass of propylene glycol monomethyl ether was added, and 4-hydroxybutyl acrylate glycidyl ether 22. A solution of 4 parts by mass and 5.0 parts by mass of propylene glycol monomethyl ether was added dropwise over 2 hours, and then further reacted over 5 hours. An unsaturated double bond-containing acrylic copolymer having a weight average molecular weight of 18,000 measured by GPC (gel permeation chromatography) was obtained. This resin had an SP value of 10.1 and a Tg of 92 ° C.

<Styrene / methacrylic resin (A3)>
Styrene / methacrylic resin (BR-50 manufactured by Mitsubishi Rayon Co., Ltd.), weight average molecular weight 65,000, SP value: 9.2, Tg: 100 ° C.

<Production Example 1-3: Preparation of fluorine-containing compound (A4)>
In a four-necked flask, 104 parts by mass of perfluoro- (1,1,9,9-tetrahydro-2,5-bisfluoromethyl-3,6-dioxanonenol) and bis (2,2,3,3) were added. , 4,45,5,6,6,7,7-dodecafluoroheptanoyl) peroxide 11 mass parts of an 8 mass% perfluorohexane solution was added. The hollow portion was purged with nitrogen, and then stirred at 20 ° C. for 24 hours under a nitrogen stream to obtain a highly viscous solid. A solution obtained by dissolving the obtained solid in diethyl ether was poured into perfluorohexane, followed by separation and vacuum drying to obtain a colorless and transparent polymer.

When this polymer was analyzed by ¹⁹ F-NMR (nuclear magnetic resonance spectrum), ¹ H-NMR, and IR (infrared absorption spectrum), it was found to be a fluorine-containing polymer having a hydroxyl group at the end of the side chain consisting of the structural unit of allyl ether. It was. The weight average molecular weight was 118,000.

  Five parts by mass of the obtained fluorine-containing allyl ether polymer having a hydroxyl group, 43 parts by mass of methyl ethyl ketone (MEK), and 1 part by mass of pyridine were charged into a four-necked flask and cooled to 5 ° C. or less with ice. And what melt | dissolved 1 mass part of alpha-fluoroacrylic acid fluoride in 9 mass parts of MEK was dripped over 10 minutes, stirring under nitrogen stream. As a result, a fluorine-containing compound (A4) having a polymerizable double bond was obtained. This resin had an SP value of 7.5 and Tg of 102 ° C.

<PMMA resin (A5)>
Polymethyl methacrylate M-4003 (manufactured by Negami Kogyo Co., Ltd., weight average molecular weight 1.000,000, SP value: 9.0, Tg: 105 ° C.

[Polymer (b)]
<Production Example 2-1: Preparation of propionyl-modified unsaturated dicarboxylic acid (anhydride) grafted polyolefin (B1)>
Polymer polyolefin (copolymer of propylene and 1-butene: “Tafmer XR110T” manufactured by Mitsui Chemicals, Inc.) is placed in a reaction vessel equipped with a stirrer and a thermometer, heated to 360 ° C. and melted, under a nitrogen stream Was heated for 100 minutes to obtain a low molecular polyolefin (b1) by thermal degradation.

  Next, 160 parts by mass of the low-molecular-weight polyolefin (b1) was placed in a reaction vessel equipped with a stirrer, a thermometer, and a cooling tube, and the mixture was heated to 180 ° C. and melted under a nitrogen stream, and then maleic anhydride 25 Part by mass and 20 parts by mass of 1-dodecene were added and mixed uniformly. Next, a solution prepared by dissolving 1 part by mass of dicumyl peroxide in 20 parts by mass of xylene prepared in advance was added dropwise over 2 hours while maintaining 180 ° C. After the addition, the mixture was further stirred at 180 ° C. for 2 hours, and maleic anhydride The grafting reaction was performed. Thereafter, xylene and 1-dodecene were distilled off under reduced pressure to obtain maleic anhydride-grafted polyolefin (bb1).

Next, 450 parts by mass of the maleic anhydride-grafted polyolefin (bb1) is placed in a reaction vessel equipped with a stirrer, a thermometer and a cooling tube, and the temperature is raised to 105 ° C. under a nitrogen stream to maintain the temperature. While stirring, 300 parts by mass of toluene was gradually added dropwise with stirring. Next, 135 parts by mass of hydroxyl group-containing propione [CH ₃ CH ₂ COO (CH ₂ ) ₂ OCO (CH ₂ ) ₅ OH] was added, reacted at the same temperature for 3 hours with stirring, cooled, and hydroxyl group-containing propionyl. A modified maleic anhydride grafted polyolefin (B1) was obtained. This resin had a weight average molecular weight of 12,100, an SP value of 10.9, and a Tg of 80 ° C.

<Production Example 2-3: Preparation of silicone acrylic block copolymer (B3)>
VPS-1001N (azo group-containing polysiloxane compound, manufactured by Wako Pure Chemical Industries, Ltd., molecular weight of polysiloxane chain 10,000, solid content 50%) 243.9 parts by mass, cyclohexyl methacrylate 144.0 parts by mass, styrene 43. 7 parts by mass, a mixture consisting of 52.3 parts by mass of hydroxylethyl methacrylate and 343.3 parts by mass of butyl acetate were mixed. This mixed solution was added to 270.0 parts by mass of butyl acetate heated to 120 ° C. under a nitrogen atmosphere in a 1000 ml reaction vessel equipped with a stirring blade, a nitrogen introducing tube, a cooling tube and a dropping funnel over 3 hours. The solution was dropped at a high speed, and then mixed at 120 ° C. for 30 minutes to be reacted. A solution of 15.0 parts by mass of butyl acetate containing 0.60 parts by mass of tertiary butyl peroxy-2-ethylhexanoate was added dropwise at a constant rate over 30 minutes, and further mixed at 120 ° C. for 1 hour to react. Thus, a silicone acrylic block copolymer having a number average molecular weight of 34,000 and a weight average molecular weight of 125,000 was obtained. This resin had an SP value of 10.8 and Tg of 69 ° C.

<Production Example 2-4: Preparation of silicone acrylic polymer (B5)>
40 parts by mass of γ-methacryloxypropyltrimethoxysilane and 20 parts by mass of butyl acetate are placed in a reactor and brought to a reflux state while being heated and stirred. A solution of 40 parts by mass of azobisisobutyronitrile, 40 parts by mass of azobisisobutyronitrile was added dropwise over 2 hours while maintaining the reflux state, and the reflux was further continued for 1 hour after the completion of the addition. The obtained resin liquid had a non-volatile content of 41%, and the Tg of the resin was 90 ° C. SP value: 8.5, weight average molecular weight 110,000.

<Production Example 2-5: Preparation of (B6)>
40 parts by mass of ethyl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.) and 20 parts by mass of butyl acetate are placed in a reactor and brought to a reflux state while being heated and stirred. A solution of 2 parts by mass of azobisisobutyronitrile and 40 parts by mass of butyl acetate was added dropwise thereto over 2 hours while maintaining the reflux state, and the reflux was further continued for 2 hours after the completion of the addition. The obtained resin liquid had a nonvolatile content of 49%, and the Tg of the resin was 65 ° C. SP value: 8.9, weight average molecular weight 750,000.

[(C) UV curable composition]
“KAYARAD DPHA” manufactured by Nippon Kayaku Co., Ltd. Dipentaerythritol hexaacrylate, molecular weight 578
“A-TMM-3LM-N” manufactured by Shin-Nakamura Chemical Co., Ltd.—pentaerythritol triacrylate—molecular weight: 298

[(D) Photopolymerization initiator]
“I-184” manufactured by Ciba Specialty Chemicals Co., Ltd .... 1-hydroxycyclohexane-1-ylphenylketone “I-907” manufactured by Ciba Specialty Chemicals Co., Ltd. 4- (Methylthio)- α-morpholino-α-methylpropiophenone

〔solvent〕
Methyl isobutyl ketone / IPA = 10/90

(Examples 1-1 to 1-3, Examples 2-1 to 2-7, Comparative Examples 1-1 to 1-7, and Comparative Examples 2-1 to 2-5)
Next, the said raw material was used as a resin composition for glare-proof hard-coat layers, and each raw material was mixed by the composition described in Table 1-4. Furthermore, 45 parts by mass of the mixture and 55 parts by mass of the solvent were mixed to prepare resin compositions AGHC-1 to AGHC-22 for an antiglare hard coat layer.

[Creation of anti-glare film]
Examples 3-1 to 3-7, Examples 4-1 to 4-4, and Comparative Examples 3-1 to 3-7 in which an antiglare hard coat layer was laminated on one surface of the thermoplastic transparent substrate film And the anti-glare film of Comparative Examples 4-1 to 4-5 was created.

<Thermoplastic transparent substrate film>
In each Example and Comparative Example, the following were used as the thermoplastic transparent substrate film.
Polycarbonate film (PC): “C000” manufactured by Sumitomo Chemical Co., Ltd., 188 μm
Polymethylmethacrylate film (PMMA): “S014G” 188 μm manufactured by Sumitomo Chemical Co., Ltd.
Film (PC / PMMA) having a two-layer structure of a polycarbonate layer and a polymethyl methacrylate layer: “C001” 200 μm manufactured by Sumitomo Chemical Co., Ltd.

(Example 3-1)
Film of antiglare hard coat layer after curing resin composition for antiglare hard coat (AGHC-2) on one surface of polymethyl methacrylate film (PMMA) “S014G, 188 μm μm” manufactured by Sumitomo Chemical Co., Ltd. The film was applied with a roll coater so as to have a thickness of 3.4 μm, and dried at 23 ° C. for 50 seconds and then at 80 ° C. for 30 seconds to produce an anti-glare film for insert molding.

(Example 3-2)
The same procedure as in Example 3-1 was performed except that the thermoplastic transparent substrate film and the resin composition for the antiglare hard coat layer were changed as shown in Table 5.

(Example 3-3)
Film of antiglare hard coat layer after curing resin composition for antiglare hard coat (AGHC-4) on one surface of polymethyl methacrylate film (PMMA) “S014G, 188 μm μm” manufactured by Sumitomo Chemical Co., Ltd. It was applied with a roll coater so as to have a thickness of 3.4 μm, and dried at 23 ° C. for 50 seconds and then at 80 ° C. for 30 seconds. Thereafter, ultraviolet rays were irradiated with a 120 W high-pressure mercury lamp (manufactured by Nippon Battery Co., Ltd.) (integrated light amount 400 mJ / cm ² ) and cured to produce an insert-molding antiglare film.

(Example 3-4 to Example 3-6, Example 4-1 to Example 4-4)
Example 3 except that the thermoplastic transparent substrate film and the composition for forming an antiglare hard coat layer were combined with the materials described in Tables 5 and 6 below and the combination of each layer. As in Example 1, an antiglare film for insert molding was prepared in the same manner as in Example 3-3, including the component (d).

  When “PC / PMMA” was used as the thermoplastic transparent substrate film, an antiglare hard coat layer was formed on the polymethyl methacrylate layer (PMMA layer).

(Comparative Example 3-1 to Comparative Example 3-7, Comparative Example 4-1 to Comparative Example 4-5)
Except that the thermoplastic transparent substrate film and the composition for forming an antiglare hard coat layer were combined with the materials described in Tables 7 and 8 below and the combination of each layer, a composition containing no component (d) was used in Example 3- As in Example 1, an antiglare film for insert molding was prepared in the same manner as in Example 3-3, including the component (d).

  About the obtained anti-glare film for insert molding, anti-glare properties, haze, Ra, fingerprint visibility, pencil hardness, and the presence or absence of cracks in the curved shape of the molded product were measured by the following methods. The results are shown in Tables 5 to 8 below.

(1) Anti-glare (1) -1 Reflection image blurring Fluorescent lamp light is reflected on the surface on which the anti-glare hard coat layer is laminated so that the fluorescent lamp distance is 3 m and the incident angle is 10 °. In this case, how much the outline of the fluorescent lamp specularly reflected at 10 ° was blurred was evaluated according to the following evaluation criteria. As the fluorescent lamp, FHF32EXNH manufactured by Panasonic Corporation was used.
○: The image is so blurred that the contour cannot be confirmed. ×: The contour is not blurred or the contour cannot be confirmed, but the image visibility is poor.
(1) -2 Haze value A haze meter (NDH2000, manufactured by Nippon Denshoku Industries Co., Ltd.) was used to measure the haze value (%) as an optical property.
(1) -3Ra (surface roughness)
Arithmetic average roughness Ra (in accordance with the provisions of JIS B0601-1994) using a surface roughness measuring instrument (manufactured by Kosaka Laboratory Co., Ltd., model name Surfcoder SE500) under the conditions of a scanning range of 4 mm and a scanning speed of 0.2 mm / s. μm).

(2) Fingerprint visibility Fingerprints were deposited on the antiglare hard coat layer, and visual sensory evaluation was performed on the visibility in the following four stages.
4: The fingerprint is not visible at all. 3: The fingerprint is very slightly visible. 2: The fingerprint is slightly visible. 1: The fingerprint is clearly visible.

(3) Pencil hardness The load was set to 750 gf and evaluated according to JIS K 5600.

(4) Presence / absence of cracks in the curved surface shape of the molded product Using an anti-glare film, insert molding is performed under the following molding conditions to create a resin molded product. The presence or absence of cracks was confirmed.
○: No crack such as crack, ×: Crack such as crack

  Injection mold (100 having a curved shape with a curvature radius R = 0.5 mm) so that the antiglare film (F1-4 to F1-20) is in contact with the polycarbonate resin in which the thermoplastic transparent substrate film is melted The polycarbonate resin that was held in the cavity in the inside of the mold and melted at a temperature of about 360 ° C. was poured into the mold at a pressure of 29400 kPa and allowed to cool. That is, an antiglare hard coat layer was applied on the molded article by an insert molding fusion method in which an antiglare film was fused to the resin simultaneously with molding of the resin.

  Furthermore, about the obtained fusion-molded product (resin molded product) of the antiglare film, the antiglare property, haze, Ra, fingerprint visibility, and pencil hardness were measured by the above methods, and as a result, Comparative Example 3- Except for 5, the characteristics before molding were retained. In Comparative Example 3-5, the properties after insert molding were 0.5% haze and Ra: 0.03 μm, and the antiglare property was significantly reduced.

  From the results shown in Tables 5 and 6, Examples 3-1 to 3-2 and Example 4-1 have good antiglare properties and excellent fingerprint visibility. hard. In Examples 3-3 to 3-6 and Examples 4-2 to 4-4 in which an appropriate amount of an ultraviolet curable resin having a (meth) acrylic group is blended, the pencil hardness can be achieved to 3H.

  On the other hand, from the results shown in Tables 7 and 8, in Comparative Examples 3-1 and 4-1, the SP value of the polymer (b) is smaller than that of the polymer (a), so the insert moldability is poor. In Comparative Examples 3-2 and 4-2, since the SP value of the polymer (a) is less than 8, the fingerprint visibility is poor. In Comparative Example 3-3, since the SP value of the polymer (b) is smaller than that of the polymer (a) and the difference in SP value is less than 0.5, the antiglare property is not exhibited. In Comparative Example 3-4, since the difference in SP value between the polymer (a) and the polymer (b) is less than 0.5, no antiglare property is exhibited. In Comparative Example 3-5, since the Tg of the polymer (a) was lower than the mold temperature, the antiglare property of the insert-molded product was greatly reduced with respect to the state of the film. In Comparative Example 3-6, since the content of the polymer (a) in a total of 100 parts by mass of the polymer (a) and the polymer (b) is less than 1 part by mass, the antiglare property is not exhibited. In Comparative Example 3-7, since the content of the polymer (a) in 100 parts by mass of the polymer (a) and the polymer (b) exceeded 30 parts by mass, the antiglare property is too strong. In Comparative Examples 4-3 to 4-5, since there is no polymer (b) component, insert moldability is poor.

Claims (4)

An anti-glare film for insert molding that is held in advance in a mold at the time of injection molding and integrated with the surface of a resin molded product,
A thermoplastic transparent substrate film, and an antiglare hard coat layer comprising a cured product of the resin composition for an antiglare hard coat layer laminated on one surface of the thermoplastic transparent substrate film,
The resin composition for an antiglare hard coat layer includes a polymer (a) and a polymer (b),
The SP value of the polymer (a) is smaller than the SP value of the polymer (b), the SP value of the polymer (a) is 8 or more, and the SP value of the polymer (a) and the SP value of the polymer (b) The difference from the value is 0.5 or more,
Tg of the polymer (a) is larger than Tg of the polymer (b), Tg of the polymer (a) is 100 ° C. or more, Tg of the polymer (b) is less than 100 ° C. , and the polymer (a) The difference between the Tg of the polymer (b) and the Tg of the polymer (b) is 20 ° C. or more,
The anti-glare film for insert molding whose content of the said polymer (a) in a total of 100 mass parts of the said polymer (a) and the said polymer (b) is 1-30 mass parts. An anti-glare film for insert molding that is held in advance in the mold during resin molding and integrated with the surface of the resin molded product,
A thermoplastic transparent substrate film, and an antiglare hard coat layer comprising a cured product of the resin composition for an antiglare hard coat layer laminated on one surface of the thermoplastic transparent substrate film,
The resin composition for an antiglare hard coat layer includes a polymer (a), a polymer (b), and an ultraviolet curable resin (c) having a (meth) acryl group,
The SP value of the polymer (a) is smaller than the SP value of the polymer (b), the SP value of the polymer (a) is 8 or more, and the SP value of the polymer (a) and the SP value of the polymer (b) The difference from the value is 0.5 or more,
Tg of the polymer (a) is larger than Tg of the polymer (b), Tg of the polymer (a) is 100 ° C. or more, Tg of the polymer (b) is less than 100 ° C. , and the polymer (a) The difference between the Tg of the polymer and the Tg of the polymer (b) is 20 ° C. or more,
Anti-glare property for insert molding in which the content of the polymer (a) is 1 to 30 parts by mass in a total of 100 parts by mass of the polymer (a), the polymer (b), and the ultraviolet curable resin (c). the film. The thermoplastic transparent substrate film has a two-layer structure of a polycarbonate layer and a polymethyl methacrylate layer,
The antiglare film for insert molding according to claim 1 or 2, wherein the antiglare hard coat layer is formed on the polymethyl methacrylate layer. The resin molded product which equips the surface with the glare-proof film for insert molding of any one of Claims 1-3.