JP2021151780A - Method for manufacturing optical component - Google Patents

Abstract

To provide a method for manufacturing an optical component having excellent mold transferability.SOLUTION: There is provided a method for manufacturing an optical component, which uses an injection molding equipment. The injection molding equipment comprises: an injection unit; and a mold 10 having a cavity 16 including a molding region 16a and a gate 18, in which the mold 10 is composed of a first mold 12 and a second mold 14, the first mold 12 has a molding surface 12a, the second mold 12 comprises a protruding core 15 configured to be slidable in a first mold direction, and the protruding core 15 has a molding surface 15a. The method for manufacturing the optical component comprises: a process of moving the protruding core 15 in a direction opposite to the first mold direction and then widening a width between the first mold 12 and the second mold 14 to expand the molding region 16a; a process of injecting and inserting a molten resin containing a copolymer of ethylene or α-olefin and a cyclic olefin into the cavity 16 through the gate 18; and a process of applying a holding pressure to the molten resin from the injection unit side and pressurizing the molten resin by the protruding core 15 while pushing the protruding core 15 provided in the second mold 14 to the molding region 16a.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for manufacturing an optical component.

Cyclic olefin copolymers are used as optical components such as optical lenses because they have excellent optical performance.
Examples of the technique relating to the method for producing an optical component made of a cyclic olefin copolymer include those described in Patent Document 1.

Patent Document 1 describes a step of injecting a molten resin into a mold from a nozzle at the tip of an injection unit, applying a holding pressure to the resin in the mold from the injection unit side, and a protruding pin for compression. Is described in a method for producing a resin molded product, which comprises a step of pushing a mold into a mold and applying a predetermined compressive force to the resin in the mold. The document describes that according to the method, a resin molded product having low birefringence, excellent surface smoothness, and inconspicuous weld lines can be obtained.

Japanese Unexamined Patent Publication No. 2016-112867

However, in the manufacturing method described in Patent Document 1, the shape error from the design value of the molding mold is large, and a resin molded product having a desired shape may not be obtained.

Further, in the manufacturing method described in Patent Document 1, surface roughness may occur on the optical surface of the obtained resin molded product. The surface roughness of the optical surface is a phenomenon in which the shape of the mold cannot be accurately transferred and unevenness or the like occurs on the surface of the optical surface of the resin molded product. It is different from the weld line, which is a streak formed when the resins that flowed in the above merge.
Further, in the manufacturing method described in Patent Document 1, there is room for improvement in that the average birefringence amount in the vicinity of the gate portion of the obtained resin molded product is large.

As a result of the study, the present inventors have found that the mold transferability can be improved and the above-mentioned problems can be solved by the method for manufacturing an optical component using a specific injection molding apparatus, and the present invention has been completed. rice field.
That is, the present invention can be shown below.

（前記一般式（Ｉ）において、Ｒ^３００は水素原子又は炭素原子数１〜２９の直鎖状または分岐状の炭化水素基を示す。）

（前記一般式（II）において、ｕは０または１であり、ｖは０または正の整数であり、ｗは０または１であり、Ｒ^６１〜Ｒ^７８ならびにＲ^ａ１およびＲ^ｂ１は、互いに同一でも異なっていてもよく、水素原子、ハロゲン原子、炭素原子数１〜２０のアルキル基、炭素原子数１〜２０のハロゲン化アルキル基、炭素原子数３〜１５のシクロアルキル基または炭素原子数６〜２０の芳香族炭化水素基であり、Ｒ^７５〜Ｒ^７８は、互いに結合して単環または多環を形成していてもよい。）

（前記一般式（III）において、ｘおよびｄは０または１以上の整数であり、ｙおよびｚ
は０、１または２であり、Ｒ^８１〜Ｒ^９９は、互いに同一でも異なっていてもよく、水素原子、ハロゲン原子、炭素原子数１〜２０のアルキル基若しくは炭素原子数３〜１５のシクロアルキル基である脂肪族炭化水素基、炭素原子数６〜２０の芳香族炭化水素基またはアルコキシ基であり、Ｒ^８９およびＲ^９０が結合している炭素原子と、Ｒ^９３が結合している炭素原子またはＲ^９１が結合している炭素原子とは、直接あるいは炭素原子数１〜３のアルキレン基を介して結合していてもよく、またｙ＝ｚ＝０のとき、Ｒ^９５とＲ^９２またはＲ^９５とＲ^９９とは互いに結合して単環または多環の芳香族環を形成していてもよい。）

（前記一般式（IV）において、Ｒ^１００、Ｒ^１０１は、互いに同一でも異なっていてもよく、水素原子または炭素原子数１〜５の炭化水素基を示し、ｆは１≦ｆ≦１８である。）［５］ 前記共重合体（Ａ１）中の前記環状オレフィン由来の繰り返し単位（ｂ）が、ビシクロ［２．２．１］−２−ヘプテンおよびテトラシクロ［４．４．０．１^２，５．１^７，１０］−３−ドデセンから選ばれる少なくとも一種の化合物に由来する繰り返し単位を含む、［４］に記載の光学部品の製造方法。
［６］ 前記共重合体（Ａ１）中の前記オレフィン由来の繰り返し単位（ａ）が、エチレンに由来する繰り返し単位を含む、［４］または［５］に記載の光学部品の製造方法。 [1] An injection unit, a cavity including a molding region for molding an optical component having an optical surface, and a mold having a gate serving as an injection port for molten resin from the injection unit into the cavity are provided. ,
The mold is composed of a pair of first mold and second mold, and is between the first mold and the second mold in the molding region of the cavity formed between the molds. The width of is 2 mm or more and 15 mm or less.
Wherein the first mold has an area 310 mm ² or more 5030Mm ² following molding surface for forming the optical surface in the molding area,
The second mold includes a slidably configured protruding core on the first mold direction in the opening, the projecting core molding area 310 mm ² or more 5030Mm ² or less for forming the optical surface A method for manufacturing an optical component using an injection molding apparatus, which has a surface in the molding region.
The protruding core is moved in a direction opposite to the direction of the first mold by 0.30 mm or more and 3 mm or less, and the width between the first mold and the second mold in the molding region of the cavity. And the process of expanding the molding area
A step of melting a resin composition containing ethylene or a copolymer of an α-olefin and a cyclic olefin, and
A step of injecting the molten resin from the injection unit into the cavity through the gate, and
The molten resin is injected into 80% or more of the inner volume of the molding region of the cavity, and the molten resin is pushed into the molding region while pushing the protruding core provided in the second mold into the molding region. A step of injecting up to 100%, then applying a holding pressure to the molten resin in the cavity from the injection unit side, and pressing the molten resin with the protruding core.
Manufacturing methods for optical components, including.
[2] The method for manufacturing an optical component according to [1], wherein the gate is formed between the first mold and the second mold and communicates with the cavity.
[3] The method for manufacturing an optical component according to [1] and [2], wherein the glass transition temperature of the copolymer is more than 120 ° C. and 170 ° C. or lower.
[4] The copolymer is
The repeating unit (a) derived from at least one olefin represented by the following general formula (I) and
At least one cyclic olefin selected from the group consisting of a repeating unit represented by the following general formula (II), a repeating unit represented by the following general formula (III), and a repeating unit represented by the following general formula (IV). The repeating unit (b) of origin and
The method for manufacturing an optical component according to any one of [1] to [3].

(In the general formula (I), R ³⁰⁰ represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms.)

(In the general formula (II), u is 0 or 1, v is 0 or a positive integer, w is 0 or 1, and R ^{61 to} R ⁷⁸ and R ^a1 and R ^b1 are identical to each other. However, they may be different, and may be a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkyl halide group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or 6 carbon atoms. It is an aromatic hydrocarbon group of ~ 20, and R ⁷⁵ ~ R ⁷⁸ may be bonded to each other to form a monocyclic ring or a polycyclic ring.)

(In the general formula (III), x and d are 0 or an integer of 1 or more, and y and z.
Is 0, 1 or 2, and R ^{81 to} R ⁹⁹ may be the same or different from each other, and may be the same or different from each other, and may be a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, or a cycloalkyl having 3 to 15 carbon atoms. An aliphatic hydrocarbon group, an aromatic hydrocarbon group having 6 to 20 carbon atoms, or an alkoxy group, which ^{is a carbon atom to which R 89} and R ⁹⁰ are bonded and a carbon atom to which R ⁹³ is bonded. Alternatively, the carbon atom to which R ⁹¹ is bonded may be bonded directly or via an alkylene group having 1 to 3 carbon atoms, and when y = z = 0, R ⁹⁵ and R ⁹² or R may be bonded. ⁹⁵ and R ⁹⁹ may be bonded to each other to form a monocyclic or polycyclic aromatic ring. )

(In the general formula (IV), R ¹⁰⁰ and R ¹⁰¹ may be the same or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and f is 1 ≦ f ≦ 18. [5] The repeating unit (b) derived from the cyclic olefin in the copolymer (A1) is bicyclo [2.2.1] -2-heptene and tetracyclo [4.4.0.1 ^{2, 5} . ^17,10 ] -3-The method for manufacturing an optical component according to [4], which comprises a repeating unit derived from at least one compound selected from dodecene.
[6] The method for producing an optical component according to [4] or [5], wherein the olefin-derived repeating unit (a) in the copolymer (A1) contains a repeating unit derived from ethylene.

According to the method for manufacturing an optical component of the present invention, since the mold transferability is excellent, an optical component having a desired shape and suppressed surface roughness of the optical surface can be obtained, and an average in the vicinity of the gate portion is obtained. An optical component having a small amount of birefringence can be obtained.

FIG. 1A is a schematic cross-sectional view of an injection molding apparatus showing the position of the protruding core before injection molding the copolymer, and FIG. 1B is the position of the protruding core after injection molding the copolymer. It is a schematic cross-sectional view of the injection molding apparatus which shows. FIG. 2 is a schematic top view and a schematic cross-sectional view of an optical component (resin molded product) obtained by the manufacturing method of the present embodiment. FIG. 3 is an optical micrograph of the lens surface (optically effective surface) obtained in Example 1. FIG. 4 is an optical micrograph showing the surface roughness generated on the lens surface (optically effective surface) obtained in Comparative Example 1.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all drawings, similar components are designated by the same reference numerals, and description thereof will be omitted as appropriate. In addition, "~" represents "greater than or equal to" to "less than or equal to" unless otherwise specified.
First, an injection molding apparatus used in the method for manufacturing an optical component of the present embodiment will be described.

<Injection molding equipment>
As shown in FIG. 1B, the injection molding apparatus of the present embodiment includes an injection unit (not shown) and a mold 10.

As the injection unit, a conventionally known one can be used, which includes a hopper for charging the resin, a cylinder for heating the resin, an injection nozzle, and the like, and the molten resin is injected into the cavity 16 through the gate 18. can do.

The mold 10 includes a cavity 16 including a molding region 16a for molding an optical component having an optical surface as a part thereof, and a gate 18 serving as an injection port for molten resin from the injection unit into the cavity 16. Has. The molding region 16a is a region sandwiched between the molding surface 12a of the first mold 12 and the molding surface 15a of the protruding core 15, which will be described later.
The mold 10 is composed of a pair of the first mold 12 and the second mold 14.
The gate 18 is formed between the first mold 12 and the second mold 14 and communicates with the cavity 16.

The molding region 16a is a region for molding a desired optical component, and the optical component has a single-sided convex shape-one-sided concave shape, a double-sided convex shape, a double-sided concave shape, a single-sided plane-one-sided concave shape, and a single-sided plane. -One-sided convex shape, one-sided plane-One-sided plane shape, etc. The optical component may have a circular shape, an elliptical shape, or the like in a plan view.

The width a between the first mold 12 and the second mold 14 in the molding region 16a of the cavity 16 is 2 mm or more and 15 mm or less, preferably 2.5 mm or more and 12 mm or less, and more preferably 2.5 mm or more and 10 mm or less. Can be.
The width of the gate 18 (the width between the first mold 12 and the second mold 14) is about 30% or more and 100% or less of the width a of the molding region 16a.

The first mold 12 exposes the molding surface 12a for forming the optical surface of the optical component in the molding region 16a. The shape of the molded surface 12a is set according to the shape of the optical surface of the optical component, and may have a convex shape, a concave shape, or a planar shape in the cross-sectional shape, and may be a circular shape, an elliptical shape, or the like in a plan view. May be good. The width of the molded surface 12a (diameter in the case of a circular shape) is shown by b in FIG.

Area of the molding surface 12a is 310 mm ² or more 5030Mm ² or less, preferably 415 mm ² or more 2850 mm ² or less, more preferably to a 490 mm ² or more 2000 mm ² or less. When the molded surface 12a has a circular shape in a plan view, the diameter b can be 20 mm or more and 80 mm or less, preferably 23 mm or more and 60 mm or less, and more preferably 25 mm or more and 50 mm or less.

The second mold 14 includes a protruding core 15. The protruding core 15 is connected to a power means such as a hydraulic cylinder (not shown) and is configured to be slidable in the opening of the second mold 14, and is configured to be slidable in FIGS. 1 (a) and 1 (a) and 1 (FIG. 1). As shown in b), it can move in the direction of the first mold 12 and in the opposite direction.

The power means includes a control means for controlling the moving position of the protruding core 15, and is configured so that the protruding core 15 can be stopped at a predetermined position.
The protruding core 15 exposes a molding surface 15a for forming an optical surface of an optical component in the molding region 16a.

The shape of the molded surface 15a is set according to the shape of the optical surface of the optical component, and may be convex, concave, or planar in cross-sectional shape, and circular, elliptical, or the like in plan view. May be good. The width of the molded surface 15a (diameter in the case of a circular shape) is shown by c in FIG.

Area of the molding surface 15a is 310 mm ² or more 5030Mm ² or less, preferably 415 mm ² or more 2850 mm ² or less, more preferably to a 490 mm ² or more 2000 mm ² or less. When the molded surface 15a has a circular shape in a plan view, the diameter c can be 20 mm or more and 80 mm, preferably 23 mm or more and 60 mm or less, and more preferably 25 mm or more and 50 mm or less.

<Manufacturing method of optical parts>
The method for manufacturing an optical component of the present embodiment uses the injection molding apparatus described above, and includes the following steps.
Step a: The protruding core 15 is moved by 0.30 mm to 3 mm in the direction opposite to the first mold direction 12, and is between the first mold 12 and the second mold 14 in the molding region 16a of the cavity 16. The width of the molding region 16a is expanded to expand the molding region 16a.
Step b: The resin composition containing ethylene or a copolymer of an α-olefin and a cyclic olefin is melted.
Step c: The molten resin obtained in step b is injected from the injection unit into the cavity 16 via the gate 18.
Step d: The molten resin is injected into 80% or more of the inner volume of the molding region 16a of the cavity 16, and the molten resin is pushed into the molding region 16a while pushing the protruding core 15 provided in the second mold into the inner volume of the molding region 16a. Injecting up to 100%, then a holding pressure is applied to the molten resin in the cavity 16 from the injection unit side, and the molten resin is projected and pressed by the core 15.

[Step a]
In this step, by using a power means such as a hydraulic cylinder (not shown), the protruding core 15 is moved in the direction opposite to the first mold direction 12 by 0.30 mm or more and 3 mm or less, preferably 0.4 mm or more and 2 mm or less, more preferably. Move 0.5 mm or more and 1 mm or less to obtain the state shown in FIGS. 1 (b) to 1 (a).
As a result, the molding region 16a is expanded.

[Step b]
In this step, a resin composition containing a copolymer of ethylene or α-olefin and a cyclic olefin is put into a cylinder via a hopper, and the resin composition is heated and melted in the cylinder. Further, by rotating the screw in the cylinder, it is moved to the injection nozzle. The order of the step a and the step b does not matter, and the steps a and b may be performed at the same time.

The temperature of the molten resin composition (cylinder set temperature) can be appropriately determined according to the glass transition temperature (Tg) and melting point (Tm) of the resin, but is usually "Tg + 100 ° C." to "Tg + 180 ° C." , Preferably "Tg + 120 ° C." to "Tg + 170 ° C.". The rotation speed of the screw is not particularly limited, but is usually appropriately selected in the range of 10 to 300 rpm.
The resin composition in this embodiment will be described.

(Resin composition)
The resin composition of the present embodiment contains a cyclic olefin copolymer (A) having a repeating unit derived from a cyclic olefin as an essential constituent unit.
Examples of the cyclic olefin copolymer (A) include a copolymer (A1) of ethylene or α-olefin and a cyclic olefin.

The cyclic olefin compound constituting the copolymer (A1) in the present embodiment is not particularly limited, and examples thereof include the cyclic olefin monomers described in paragraphs 0037 to 0063 of International Publication No. 2006/0118261.

The copolymer (A1) in the present embodiment is generally described below from the viewpoint of further improving heat resistance and improving moldability while maintaining a good balance between the transparency and the refractive index of the obtained optical component. A repeating unit (a) derived from at least one olefin represented by the formula (I), a repeating unit represented by the following general formula (II), a repeating unit represented by the following general formula (III), and the following general. It is preferable to have a repeating unit (b) derived from at least one cyclic olefin selected from the group consisting of the repeating unit represented by the formula (IV).

In the above general formula (I), R ³⁰⁰ represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms.

In the above general formula (II), u is 0 or 1, v is 0 or a positive integer, preferably an integer of 0 or more and 2 or less, more preferably 0 or 1, and w is 0 or 1. R ^{61 to} R ⁷⁸ and R ^a1 and R ^b1 may be the same or different from each other, and are hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms, alkyl halide group having 1 to 20 carbon atoms, and the like. It is a cycloalkyl group having 3 to 15 carbon atoms or an aromatic hydrocarbon group having 6 to 20 carbon atoms, and R ^{75 to} R ⁷⁸ may be bonded to each other to form a monocyclic ring or a polycyclic ring.

In the above general formula (III), x and d are 0 or an integer of 1 or more, preferably an integer of 0 or more and 2 or less, more preferably 0 or 1, y and z are 0, 1 or 2, and R. ^{81 to} R ⁹⁹ may be the same as or different from each other, and are an aliphatic hydrocarbon group or carbon which is a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 15 carbon atoms. It is an aromatic hydrocarbon group or alkoxy group having 6 to 20 ^{atoms, and a carbon atom to which R 89} and R ⁹⁰ are bonded and a carbon atom to which R ⁹³ is bonded or a carbon atom to which R ⁹¹ is bonded. May be bonded directly or via an alkylene group having 1 to 3 carbon atoms, and when y = z = 0, R ⁹⁵ and R ⁹² or R ⁹⁵ and R ⁹⁹ are bonded to each other. It may form a monocyclic or polycyclic aromatic ring.

In the above general formula (IV), R ¹⁰⁰ and R ¹⁰¹ may be the same or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and f is 1 ≦ f ≦ 18.

The olefin monomer, which is one of the copolymerization raw materials of the copolymer (A1) in the present embodiment, is addition-copolymerized to form a structural unit represented by the above general formula (I). Specifically, an olefin monomer represented by the following general formula (Ia) corresponding to the above general formula (I) is used.

In the above general formula (Ia), R ³⁰⁰ represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms. Examples of the olefin monomer represented by the general formula (Ia) include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3-methyl-1-pentene, and 3 -Ethyl-1-pentene, 4-methyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl-1-pentene, 4-ethyl-1-hexene , 3-Ethyl-1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene and the like. Among these, ethylene and propylene are preferable, and ethylene is particularly preferable, from the viewpoint of obtaining an optical component having more excellent heat resistance, mechanical properties and optical properties. Two or more kinds of olefin monomers represented by the general formula (Ia) may be used.

When the total of the structural units constituting the cyclic olefin-based copolymer in the present embodiment is 100 mol%, the ratio of the repeating unit (a) derived from the olefin is preferably 5 mol% or more and 95 mol% or less, more preferably. Is 20 mol% or more and 90 mol% or less, more preferably 40 mol% or more and 80 mol% or less, and particularly preferably 50 mol% or more and 70 mol% or less.
The proportion of the repeating unit (a) derived from olefin can be measured by ^{13 C-NMR.}

The cyclic olefin monomer (b), which is one of the copolymerization raw materials of the copolymer (A1) in the present embodiment, is subjected to addition copolymerization to carry out the above general formula (II), the above general formula (III) or the above general formula (IV). ) Is formed as a repeating unit (b) derived from the cyclic olefin. Specifically, the cyclic olefins represented by the general formulas (IIa), (IIIa), and (IVa) corresponding to the general formula (II), the general formula (III), and the general formula (IV), respectively. Monomer (b) is used.

In the above general formula (IIa), u is 0 or 1, v is 0 or a positive integer, preferably an integer of 0 or more and 2 or less, more preferably 0 or 1, and w is 0 or 1. R ^{61 to} R ⁷⁸ and R ^a1 and R ^b1 may be the same or different from each other, and are hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms, alkyl halide group having 1 to 20 carbon atoms, and the like. It is a cycloalkyl group having 3 to 15 carbon atoms or an aromatic hydrocarbon group having 6 to 20 carbon atoms, and R ^{75 to} R ⁷⁸ may be bonded to each other to form a monocyclic or polycyclic ring. ..

In the above general formula (IIIa), x and d are 0 or an integer of 1 or more, preferably an integer of 0 or more and 2 or less, more preferably 0 or 1, y and z are 0, 1 or 2, and R. ^{81 to} R ⁹⁹ may be the same as or different from each other, and are an aliphatic hydrocarbon group or carbon which is a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 15 carbon atoms. It is an aromatic hydrocarbon group or alkoxy group having 6 to 20 ^{atoms, and a carbon atom to which R 89} and R ⁹⁰ are bonded and a carbon atom to which R ⁹³ is bonded or a carbon atom to which R ⁹¹ is bonded. May be bonded directly or via an alkylene group having 1 to 3 carbon atoms, and when y = z = 0, R ⁹⁵ and R ⁹² or R ⁹⁵ and R ⁹⁹ are bonded to each other. It may form a monocyclic or polycyclic aromatic ring.

In the above general formula (IVa), R ¹⁰⁰ and R ¹⁰¹ may be the same or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and f is 1 ≦ f ≦ 18.

By using the olefin monomer represented by the general formula (Ia) described above and the cyclic olefin monomer (b) represented by the general formula (IIa), (IIIa) or (IVa) as the copolymerization component, a cyclic olefin system is used. Since the solubility of the copolymer (A) in the solvent is further improved, the moldability is improved and the yield of the product is improved.

For specific examples of the cyclic olefin monomer (b) represented by the general formula (IIa), (IIIa) or (IVa), the compounds described in paragraphs 0037 to 0063 of International Publication No. 2006/0118261 can be used.

Specifically, bicyclo-2-heptene derivative (bicyclohept-2-ene derivative), tricyclo-3-decene derivative, tricyclo-3-undecene derivative, tetracyclo-3-dodecene derivative, pentacyclo-4-pentadecene derivative, pentacyclo Pentadecadien derivative, pentacyclo-3-pentadecene derivative, pentacyclo-4-hexadecene derivative, pentacyclo-3-hexadecene derivative, hexacyclo-4-heptadecene derivative, heptacyclo-5-eicosene derivative, heptacyclo-4-eicosene derivative, heptacyclo-5 -Heneikosen derivative, octacyclo-5-docosene derivative, nonacyclo-5-pentacosene derivative, nonacyclo-6-hexacosene derivative, cyclopentadiene-acenaftylene adduct, 1,4-methano-1,4,4a, 9a-tetrahydrofluorene derivative, Examples thereof include 1,4-methano-1,4,4a, 5,10,10a-hexahydroanthracene derivatives and cycloalkylene derivatives having 3 to 20 carbon atoms.

Cyclic olefin monomer (b) represented by the general formula (IIa), (IIIa) or (IVa)
Of these, cyclic olefins represented by the general formula (IIa) are preferable.
As the cyclic olefin monomer (b) represented by the above general formula (IIa), bicyclo [2.2.1] -2-heptene (also referred to as norbornene), tetracyclo [4.4.0.1 ^2,5 . 1 ^7,10] -3-dodecene (also referred to as tetracyclododecene.) It is preferable to use at least one selected from tetracyclo [4.4.0.1 ^{2, 5.} It is more preferable to use 17 and ^{10] -3-dodecene.} Since these cyclic olefins have a rigid ring structure, they have an advantage that the elastic modulus of the copolymer and the optical component can be easily maintained.

When the total amount of the structural units constituting the copolymer (A1) in the present embodiment is 100 mol%, the proportion of the repeating unit (b) derived from the cyclic olefin monomer (b) is preferably 5 mol% or more and 95 mol%. % Or less, more preferably 10 mol% or more and 80 mol% or less, further preferably 20 mol% or more and 60 mol% or less, and particularly preferably 30 mol% or more and 50 mol% or less.

The copolymerization type of the copolymer (A1) in the present embodiment is not particularly limited, and examples thereof include a random copolymer and a block copolymer. In the present embodiment, the copolymer (A1) in the present embodiment has a random common weight from the viewpoint of being excellent in optical properties such as transparency, refractive index and birefringence, and being able to obtain highly accurate optical components. It is preferable to use coalescence.

Examples of the copolymer (A1) in the present embodiment include ethylene and tetracyclo [4.4.0.1 ^2,5 . ^{It is preferably at least one selected from a random copolymer of 17,10} ] -3-dodecene and a random copolymer of ethylene and bicyclo [2.2.1] -2-heptene, preferably with ethylene. Tetracyclo [4.4.0.1 ^2,5 . ^{A random copolymer with 17,10} ] -3-dodecene is more preferred.
In the present embodiment, one type of the cyclic olefin copolymer (A) may be used alone, or two or more types may be used in combination.

The lower limit of the content of the copolymer (A1) contained in the cyclic olefin copolymer (A) in the present embodiment is 100 mass by mass of the cyclic olefin copolymer (A) contained in the optical component in the present embodiment. In terms of%, it is preferably 70% by mass or more, more preferably 80% by mass or more, still more preferably 90% by mass or more, and particularly preferably 95% by mass or more. When the content of the copolymer (A1) in the cyclic olefin copolymer (A) in the present embodiment is at least the above lower limit value, the optical performance can be further improved.

The upper limit of the content of the copolymer (A1) contained in the cyclic olefin copolymer (A) in the present embodiment is not particularly limited, but the cyclic olefin copolymer (A) contained in the optical component in the present embodiment is not particularly limited. ) Is 100% by mass or less.

The copolymer (A1) in the present embodiment is, for example, JP-A-60-168708, JP-A-61-120816, JP-A-61-115912, JP-A-61-115916, It can be produced by appropriately selecting conditions according to the methods of JP-A-61-271308, JP-A-61-272216, JP-A-62-252406, JP-A-62-252407, and the like. can.

From the viewpoint of the effect of the present invention, the glass transition temperature of the cyclic olefin copolymer (A) according to the present embodiment is preferably more than 120 ° C. and 170 ° C. or lower, more preferably 125 ° C. or higher and 160 ° C. or lower, and even more preferably. Is 130 ° C. or higher and 155 ° C. or lower.

The glass transition temperature of the cyclic olefin copolymer (A) according to the present embodiment can be controlled, for example, by the type and amount of the repeating unit contained in the cyclic olefin copolymer (A) and the production conditions.

The glass transition point (Tg) of the cyclic olefin copolymer (A) according to the present embodiment can be measured using, for example, a differential scanning calorimeter (DSC). For example, using an RDC220 manufactured by SII Nanotechnology, the temperature is raised from room temperature to 200 ° C. at a heating rate of 10 ° C./min in a nitrogen atmosphere, then held for 5 minutes, and then held at a heating rate of 10 ° C./min to 30 ° C. The glass transition point can be measured when the temperature is lowered, held for 5 minutes, and then raised to 200 ° C. at a heating rate of 10 ° C./min.

(Other ingredients)
In addition to the cyclic olefin copolymer (A), the resin composition of the present embodiment may contain an additive known as an optional component as an optional component within a range that does not impair the good physical characteristics of the optical components of the present embodiment. can.

Additives include, for example, hydrophilic stabilizers, hydrophilic agents, antioxidants, secondary antioxidants, lubricants, mold release agents, antifogging agents, weather stabilizers, light stabilizers, UV absorbers, antistatic agents. , Metal inactivating agent and the like.

Among the above, the resin in the present embodiment preferably contains a hydrophilic stabilizer. It is more preferable to include a hydrophilic stabilizer because deterioration of optical performance under high temperature and high humidity conditions can be suppressed.
The hydrophilic stabilizer is preferably a fatty acid ester of a fatty acid and a polyhydric alcohol. Fatty acid esters with fatty acids and polyhydric alcohols having one or more ether groups are more preferred.

In the present embodiment, the lower limit of the content of the cyclic olefin copolymer (A) in the resin composition is preferably 70% by mass or more, more preferably 80, when the whole resin composition is 100% by mass. It is mass% or more, more preferably 90% by mass or more, and particularly preferably 95% by mass or more. When the content of the cyclic olefin copolymer (A) in the resin composition is at least the above lower limit value, the optical performance can be further improved.
The upper limit of the content of the cyclic olefin copolymer (A) in the resin composition is not particularly limited, but is, for example, 100% by mass or less.

[Step c]
In this step, the molten resin obtained in step b is injected and injected into the cavity 16 from the injection nozzle of the injection unit via the gate 18 (FIG. 1A).
The injection pressure when injection is injected into the mold from the injection nozzle may be appropriately selected and set in consideration of conditions such as the structure of the mold and the fluidity of the resin, but is usually 500 to 15,000 kgf / cm. It is done in the range of ^2.

The temperature of the mold can be appropriately determined according to the glass transition temperature (Tg) and melting point (Tm) of the resin having an alicyclic structure, but is usually "Tg-30 ° C" to "Tg + 10 ° C". , Preferably "Tg-20 ° C." to "Tg".

[Step d]
In this step, the molten resin is injected into 80% or more of the inner volume of the molding region 16a of the cavity 16, and the molten resin is pushed into the molding region 16a while pushing the protruding core 15 provided in the second mold into the molding region 16a. Inject up to 100% of the inner volume of. Next, a holding pressure is applied to the molten resin in the cavity 16 from the injection unit side, and the molten resin is projected and pressed by the core 15.

In this way, when a predetermined amount of the molten resin is injected, the mold transferability can be improved by uniformly pressing the molten resin over the entire molding surface 15a having a predetermined area of the protruding core 15. An optical component having a desired shape and suppressed surface roughness of the optical surface can be obtained, and an optical component having a small average birefringence amount in the vicinity of the gate portion can be obtained.

When the protruding core 15 is pushed in when the filling rate of the molten resin is less than 80% of the inner volume of the molding region 16a, the protruding core 15 narrows the flow path through which the molten resin passes, so that the resin is easily oriented and molded. The amount of birefringence of the product becomes large, the compression effect cannot be obtained, the transferability of the mold to the molded product deteriorates, and the surface of the optical surface becomes rough.

Therefore, from the viewpoint of the effect of the present invention, at the time when the protruding core 15 is pushed in, the filling rate of the molten resin in the molding region 16a is 80% or more, preferably 85% or more, more preferably 90% or more of the inner product of the molding region 16a. It can be% or more. The upper limit is not particularly limited, but may be 100% or less, preferably 99% or less, and more preferably 98% or less.

The time for applying the holding pressure and the time for applying the compressive force to the molten resin in the mold using the protruding core 15 do not have to be completely the same.
The holding pressure is the pressure applied to the resin in the mold after the resin is filled in the mold until the resin in the gate portion of the mold is completely cooled and solidified. Even after the mold is filled with the resin, the resin in the mold can be held under pressure by operating the screw of the injection unit for a predetermined time.

The holding pressure and time can be appropriately determined according to the size and shape of the optical component. The holding pressure is usually 10 to 200 MPa, preferably 20 to 140 MPa. The holding time is usually 2 to 30 seconds.

The protruding core 15 is pushed in the first mold direction 12 to the molding region 16a. That is, the protruding core 15 is moved by 0.30 mm or more and 3 mm or less, preferably 0.4 mm or more and 2 mm or less, more preferably 0.5 mm or more and 1 mm or less (FIGS. 1 (a) to 1 (b)), and the melting is performed. The resin is pressed against the molding surface 12a having a predetermined area. Thereby, the mold transferability can be improved and the effect of the present invention can be obtained.
The pressure on the molten resin and the pushing time by pushing the protruding core 15 are appropriately adjusted.
The time for applying the holding pressure and the time for applying the compressive force to the resin in the mold using the protruding core 15 do not have to be completely the same.

After the step d, the resin in the mold is cooled and solidified according to a conventional method, and then the mold is opened and the resin molded product (optical component) is taken out. The cooling time is not particularly limited, but is usually 1 to 500 seconds.

[Optical parts]
As shown in FIG. 2, the resin molded product (optical component) obtained by the manufacturing method of the present embodiment has an effective optical surface (a portion surrounded by an inner circle, diameter b) having a circular shape on the R1 surface in a top view. Has. It has a circular effective optical surface (diameter c) on the R2 surface, which is the back surface.
The manufacturing method of the present embodiment is excellent in mold transferability, and the surface roughness of the optical surface of the obtained optical component is suppressed.

The optical component obtained by the manufacturing method of the present embodiment has a desired shape according to the mold design, and has a surface shape variation PV value in the resin flow direction (MD direction) shown in FIG. 2 and a resin. The surface shape variation PV value in the direction perpendicular to the flow (TD direction) is small. The PV value can be 2.0 μm or less, preferably 1.5 μm or less, and more preferably 1.0 μm or less. The smaller the PV value, the more preferable it is, so the lower limit value is not particularly limited, but is, for example, 0.1 μm or more.

Here, the PV value indicates the difference between the point having the largest shape error from the design value of the molding die (Peek) and the point having the smallest shape error from the design value of the molding die (Valley). The PV value and ΔPV can be measured by measuring the shape of the lens surface with a three-dimensional measuring device, and specifically, can be evaluated by the method described in Examples.
Further, the manufacturing method of the present embodiment is excellent in mold transferability, and the obtained optical component has a small average birefringence amount in the vicinity of the gate 18.
The average birefringence amount is the average value of the phase differences of the wavelengths of 523 nm, 543 nm, and 575 nm in ^{the region (25 mm 2} ) of the gate position 5 mm × 5 mm square.

Since the optical component according to this embodiment contains the cyclic olefin copolymer (A), it has excellent optical performance. Therefore, it can be suitably used as an optical component in an optical system that needs to identify an image with high accuracy. The optical component is a component used in an optical system device or the like, and specific examples thereof include a sensor lens, a pickup lens, a projector lens, a prism, an fθ lens, an imaging lens, a light guide plate, and the like, and relates to the present embodiment. From the viewpoint of effect, it can be suitably used for an fθ lens, an imaging lens, a sensor lens, a prism or a light guide plate.

The shape of the lens is a convex lens with spherical surfaces on both sides, a concave lens with spherical surfaces on both sides, a lens with spherical and convex shapes on one side and an aspherical shape on the other side, and a lens with a spherical shape and concave shape on one side and an aspherical shape on the other side. Lens, lens with spherical and convex shape on one side and flat on the other side, lens on aspherical side and convex on one side and flat on the other side, diffractive lens, Fresnel type lens, wafer lens, wafer lens array, wafer A laminate of lens arrays can be mentioned.

In particular, the optical component according to the present embodiment has a desired shape, the surface roughness of the optical surface is suppressed, and the average amount of double refraction near the gate portion is small, so that the optical component is used as the above-mentioned conventional optical component. Of course, it can also be used for optical components such as in-vehicle camera lenses and camera lenses for portable devices (mobile phones, smartphones, tablets, etc.). Examples of in-vehicle camera lenses and camera lenses for portable devices include view camera lenses, sensing camera lenses, light convergence lenses for head-up displays, light diffusion lenses for head-up displays, cameras for personal computers, and cameras for mobile phones. , Cameras for smartphones, cameras for tablet terminals, cameras for mobile devices, digital cameras, lenses in various optical devices such as cameras for medical devices, and the like. The in-vehicle camera may capture a visible image, an infrared image, or both, and in the case of a visible image, it may be a black-and-white image. It may be a color image. In addition, examples of applications other than the above include automobile interior panels, automobile lamp lenses, automobile inner lenses, automobile lens protective covers, automobile light guides, and the like. The optical component according to the present embodiment can be suitably used particularly for an in-vehicle use.

Although the embodiments of the present invention have been described above, these are examples of the present invention, and various configurations other than the above can be adopted as long as the effects of the present invention are not impaired.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

<Manufacturing example>
<Preparation of resin composition A>
(Catalyst preparation)
Diluted VO a _{(OC 2} H 5) Cl ₂ with cyclohexane, vanadium concentration was prepared vanadium catalyst is 6.7 mmol / L-cyclohexane. Ethylaluminum sesquichloride (Al (C ₂ H ₅ ) _1.5 Cl _1.5 ) was diluted with cyclohexane to prepare an organoaluminum compound catalyst having an aluminum concentration of 107 mmol / L-hexane.

(polymerization)
Using a stirring polymerizer (inner diameter 500 mm, reaction volume 100 L), ethylene and tetracyclo [4.4.0.1 ^2,5 . A ^{copolymerization reaction with 17 and 10} ] -3-dodecene was carried out. Here, ethylene was supplied into the polymerizer together with hydrogen gas. When this copolymerization reaction is carried out, the vanadium catalyst prepared by the above method is used in an amount such that the vanadium catalyst concentration with respect to cyclohexane in the polymer used as the polymerization solvent is 0.6 mmol / L. Supplied in. Further, ethyl aluminum sesquichloride, which is an organoaluminum compound, was supplied into the polymer in an amount such that Al / V = 18.0. The polymerization temperature was 8 ° C., the polymerization pressure was 1.8 kg / cm ² G, and the copolymerization reaction was continuously carried out.

(Decalcification)
Ethylene and tetracyclo [4.4.0.1 ^2,5 . ^17,10 ] To the copolymer solution with -3-dodecene, water and an aqueous sodium hydroxide solution having a concentration of 25% by mass as a pH adjuster were added to stop the polymerization reaction. In addition, the catalyst residue present in the copolymer was removed (decalcified) from the copolymer solution. Ethylene and tetracyclo [4.4.0.1 ^2,5 . 1 ^{7, 10} ] -3- (3,5-di-t-butyl-4) as a stabilizer in a cyclohexane solution (polymer concentration: 7.7% by mass) of a copolymer with dodecene. -Hydroxyphenyl) propionate] was added so that the amount added to the copolymer was 0.4 parts by mass with respect to 100 parts by mass of the copolymer. Then, before entering the flash drying step, the mixture was once mixed for 1 hour using a stirring tank having ^{an effective volume of 1.0 m 3.}

(Desolvent)
The concentration of the copolymer in the cyclohexane solution was set to 5% by mass in a double-tube heater (outer tube diameter 2B, inner tube diameter 3/4B, length 21m) using 20kg / cm2G steam as a heat source. A cyclohexane solution of the above polymer was supplied at an amount of 150 kg / h and heated to 180 ° C.
Using a double-tube flash dryer (outer tube diameter 2B, inner tube diameter 3/4B, length 27m) and a flash hopper (volume 200L) using 25kg / cm2G steam as a heat source, the above heating step is performed. Ethylene and tetracyclo in a molten state flash-dried by removing most of the unreacted monomers together with cyclohexane as a polymerization solvent from the cyclohexane solution of the above-mentioned copolymer [4.4.0.1 ^2,5 . ^{17 and 10} ] -3-Dodecene and a random copolymer (cyclic olefin copolymer (A-1) were obtained. The glass transition temperature of the cyclic olefin copolymer (A-1) was obtained by the method described later. When Tg (° C.) was evaluated, it was 155 ° C.

(Extrusion)
Exepearl PE-MS (manufactured by Kao Co., Ltd.) as a fatty acid ester is heated at 100 ° C. for 4 hours in a molten state in an amount of 2.1 parts by mass with respect to 100 parts by mass of the cyclic olefin copolymer (A-1). An underwater pelletizer that is directly charged into a twin-screw kneading extruder with a vent, kneaded with a cyclic olefin copolymer (A-1) charged from the resin charging part of the extruder, and attached to the extruder outlet. The obtained pellets were dried with hot air at a temperature of 100 ° C. for 4 hours to obtain a resin composition A-1.

[Glass transition temperature Tg (° C)]
The glass transition temperature Tg of the cyclic olefin copolymer was measured under _{an N 2} (nitrogen) atmosphere using DSC-6220 manufactured by Shimadzu Science Co., Ltd. The cyclic olefin copolymer was heated from room temperature to 200 ° C. at a heating rate of 10 ° C./min and then held for 5 minutes, and then cooled to -20 ° C. at a temperature lowering rate of 10 ° C./min and then held for 5 minutes. .. Then, the glass transition point (Tg) of the cyclic olefin copolymer was determined from the endothermic curve when the temperature was raised to 200 ° C. at a heating rate of 10 ° C./min. The glass transition point (Tg) was 140 ° C.

(Manufacturing of optical parts)
<Example 1>
Optical parts were manufactured using an injection molding machine equipped with a mold having the following sizes.
As shown in FIG. 1A, the protruding core was moved in the direction opposite to the direction of the first mold 12 by the amount of compression shown in Table 1. The resin composition A-1 was charged into the injection unit, melted at a cylinder temperature of 260 ° C., and the molten resin was injected from the injection unit into the cavity 16 via the gate 18. Table 1 shows the protruding core 15 provided in the second mold 14 when the molten resin is injected into the inner volume of 97% or more of the molding region (optically effective portion) 16a in the mold 10 (mold temperature 120 ° C.). Move by the amount of compression, push it to the molding region 16a, press the molten resin, inject the resin up to 100% of the inner volume of the molding region (optically effective portion) 16a in the mold 10 (mold temperature 120 ° C.), and then the cavity. The molten resin in the tee 16 was held under the pressure shown in Table 1 to cool and solidify the resin in the mold, and then the mold was opened to obtain a resin molded product (optical component).
(Mold size)
-Diameter (width) b of the molding surface 12a of the first mold 12: φ28 mm
-Area of molding surface 12a: 615 mm ²
-Diameter (width) c of the molding surface 15a of the protruding core 15: φ26.9 mm
-Area of molding surface 15a: 568 mm ²
-Thickness a of molding area (optical effective part) 16a: 2.7 mm
-Width of gate 18: 1.2 mm
・ Lens shape: Meniscus lens

<Example 2, Comparative Examples 1 to 3>
A resin molded product (optical component) was prepared in the same manner as in Example 1 except that the conditions shown in Table 1 were met.

<Example 3, Comparative Example 4>
A resin molded product (optical component) was prepared in the same manner as in Example 1 except that the size of the mold was changed as follows and the conditions shown in Table 1 were met.
-Diameter (width) b of the molding surface 12a of the first mold 12: φ46 mm
-Area of molding surface 12a: 1661 mm ²
-Diameter (width) c of the molding surface (flat surface) 15a of the protruding core 15: φ46 mm
-Area of molding surface 15a: 3524 mm ²
-Thickness a of molding region (optical effective part) 16a: 10 mm
・ Width of gate 18: 2 mm
・ Lens shape: Plano-convex lens

[Evaluation method for optical components]
The obtained optical components were evaluated by the following methods.

[Lens shape]
The shape of the lens surface of the optical components of Examples and Comparative Examples was measured with an ultra-high precision coordinate measuring device UA3P (manufactured by Panasonic Corporation). The measurement was performed using a diamond stylus with a radius of curvature of 2 μm at a measurement speed of 0.1 mm / s for the R1 and R2 surfaces of the optical component, in the MD direction and TD in the range of 87% of the effective diameter (diameter 6 mm). Each direction was carried out and the PV value was determined. Here, the difference between the point with the largest shape error from the design value of the molding mold (Peek) and the point with the smallest shape error from the design value of the molding mold (Valley) is taken as the acronym and the PV value. Called.
The R1 surface is the surface on the 12th side of the first mold in injection molding, and the R2 surface is the surface on the 14th side of the second mold in injection molding. Further, as shown in FIG. 2, the MD direction indicates the resin flow direction, and the TD direction indicates the direction perpendicular to the resin flow. It was evaluated according to the following criteria.
(standard)
〇: PV value in both MD direction and TD direction is 2 μm or less ×: Either PV value in MD direction or TD direction is larger than 2 μm

[Birefringence]
The obtained optical component was measured at three wavelengths (wavelengths 523 nm, 543 nm, 575 nm) using a wide-range birefringence evaluation system (WPA-200 manufactured by Photonic Lattice), and the gate position shown in FIG. 2 was 5 mm × 5 mm. The phase difference in the corner region was measured and the average value was calculated. It was evaluated according to the following criteria.
(standard)
〇: The average value of the phase difference is 10 nm or less ×: The average value of the phase difference is larger than 10 nm

[Surface roughness]
The surface of the optically effective surface of the R1 surface of the optical component was observed with an optical microscope (25 times).
It was evaluated according to the following criteria.
(standard)
〇: No surface roughness occurs ×: Surface roughness occurs
FIG. 3 shows an optical microscope photograph of the optical effective surface (without surface roughness) of the optical component obtained in Example 1, and FIG. 4 shows the optical effective surface of the optical component obtained in Comparative Example 1. An optical micrograph showing the surface roughness is shown.

As shown in Table 1, according to the method for manufacturing an optical component using a predetermined injection molding machine of the present invention, since the mold transferability is excellent, the PV value is small and the desired shape is obtained. It has been clarified that the surface roughness of the optical surface is suppressed, and an optical component having a small average birefringence near the gate can be obtained. Since the optical component obtained by the manufacturing method of the present invention has these characteristics, it can be suitably used as various lenses.

1 Injection molding device 10 Mold 12 1st mold 12a Molding surface 14 2nd mold 15 Protruding core 15a Molding surface 16 Cavity 16a Molding area 18 Gate a Width of molding area b Width (diameter) of molding surface 12a
c Width (diameter) of the molding surface 15a

Claims (6)

It comprises an injection unit, a cavity including a molding area for molding an optical component having an optical surface, and a mold having a gate serving as an injection port for molten resin from the injection unit into the cavity.
The mold is composed of a pair of first mold and second mold, and is between the first mold and the second mold in the molding region of the cavity formed between the molds. The width of is 2 mm or more and 15 mm or less.
Wherein the first mold has an area 310 mm ² or more 5030Mm ² following molding surface for forming the optical surface in the molding area,
The second mold includes a slidably configured protruding core on the first mold direction in the opening, the projecting core molding area 310 mm ² or more 5030Mm ² or less for forming the optical surface A method for manufacturing an optical component using an injection molding apparatus, which has a surface in the molding region.
The protruding core is moved in a direction opposite to the direction of the first mold by 0.30 mm or more and 3 mm or less, and the width between the first mold and the second mold in the molding region of the cavity. And the process of expanding the molding area
A step of melting a resin composition containing an ethylene or α-olefin and a copolymer of a cyclic olefin, and
A step of injecting the molten resin from the injection unit into the cavity through the gate, and
The molten resin is injected into 80% or more of the inner volume of the molding region of the cavity, and the molten resin is pushed into the molding region while pushing the protruding core provided in the second mold into the molding region. A step of injecting up to 100%, then applying a holding pressure to the molten resin in the cavity from the injection unit side, and pressing the molten resin with the protruding core.
Manufacturing methods for optical components, including. The method for manufacturing an optical component according to claim 1, wherein the gate is formed between the first mold and the second mold and communicates with the cavity. The method for manufacturing an optical component according to claim 1 or 2, wherein the glass transition temperature of the copolymer is more than 120 ° C. and 170 ° C. or lower. The copolymer
The repeating unit (a) derived from at least one olefin represented by the following general formula (I) and
At least one cyclic olefin selected from the group consisting of a repeating unit represented by the following general formula (II), a repeating unit represented by the following general formula (III), and a repeating unit represented by the following general formula (IV). The repeating unit (b) of origin and
The method for manufacturing an optical component according to any one of claims 1 to 3.

(In the general formula (I), R ³⁰⁰ represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms.)

(In the general formula (II), u is 0 or 1, v is 0 or a positive integer, w is 0 or 1, and R61 to R78 and R ^a1 and R ^b1 are the same or different from each other. It may be a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkyl halide group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or 6 to 20 carbon atoms. R ^{75 to} R ⁷⁸ may be bonded to each other to form a monocyclic or polycyclic ring.)

(In the general formula (III), x and d are 0 or an integer of 1 or more, y and z are 0, 1 or 2, and R ^{81 to} R ⁹⁹ may be the same or different from each other. A hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms or an aliphatic hydrocarbon group having 3 to 15 carbon atoms, an aromatic hydrocarbon group having 6 to 20 carbon atoms, or an alkoxy group. Yes, the ^{carbon atom to which R 89} and R ⁹⁰ are bonded and the carbon atom to which R ⁹³ is bonded or the carbon atom to which R ⁹¹ is bonded directly or have an alkylene group having 1 to 3 carbon atoms. They may be bonded via each other, and when y = z = 0, R ⁹⁵ and R ⁹² or R ⁹⁵ and R ⁹⁹ may be bonded to each other to form a monocyclic or polycyclic aromatic ring. good.)

(In the general formula (IV), R ¹⁰⁰ and R ¹⁰¹ may be the same or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and f is 1 ≦ f ≦ 18. .) The repeating unit (b) derived from the cyclic olefin in the copolymer (A1) is bicyclo [2.2.1] -2-heptene and tetracyclo [4.4.0.1 ^2,5 . ^17.10 ] -3-The method for manufacturing an optical component according to claim 4, which comprises a repeating unit derived from at least one compound selected from dodecene. The method for producing an optical component according to claim 4 or 5, wherein the repeating unit (a) derived from the olefin in the copolymer (A1) contains a repeating unit derived from ethylene.

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