JP2013028162A - Transparent insulating laminate and printed circuit board using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transparent insulating laminate that is environmentally friendly due to the use of a compound of plant origin, has excellent heat resistance and moisture and water resistance, and exhibits high adhesiveness and transparency, and also to provide a flexible printed circuit board using the laminate.SOLUTION: The transparent insulating laminate has a transparent insulating layer on at least one side of a transparent supporting body, wherein the transparent insulating layer contains a specific polymer including a structure derived from dehydroabietic acid in the main chain.

Description

  The present invention relates to a transparent insulating laminate and a printed circuit board using the same.

  A flexible printed circuit board is widely used as a circuit component of an electronic device that requires flexibility and space saving. For example, device mounting boards for display devices such as liquid crystal displays and plasma displays, board-to-board relay cables for mobile phones, digital cameras and portable game machines, operation switch board, etc. are all indispensable for daily life and industry. Non-electrical equipment. Such a flexible printed circuit board needs to have low water absorption in order to protect the electric circuit from moisture. Furthermore, electrical characteristics (low dielectric constant) are required, and heat resistance that can withstand solder at about 230 to 260 ° C. is required. Currently, substrates using polyimide are the mainstream as satisfying such conditions.

  Among the applications described above, for example, a liquid crystal display can be cited, and the market is rapidly expanding. A glass substrate is currently used as a base material for display panels, but a transparent substrate was used to further reduce the processing cost by making it thinner, lighter, flexible, and roll-to-roll process. The development of flexible displays is expected to continue.

  However, the above-described film material made of polyimide is generally colored yellowish. The above transparent substrate cannot satisfy the requirements. Although the production of a transparent polyimide film has also been proposed (see Patent Documents 1 and 2), the water absorption is high and the electrical characteristics (insulating properties) are poor. A material using polyethylene naphthalate (PEN) by changing the material has been studied (see Patent Documents 3 and 4). Although moisture absorption can be suppressed by this, heat resistance is still insufficient. In addition, thermal shrinkage due to long-time heating accompanying a reflow process or the like is large.

  In addition to flexible printed circuit boards, optical films such as display devices, protective films, and transparent members used in various industrial applications, such as film materials that suppress moisture absorption, have high heat resistance, have high adhesion, and are highly transparent. There are a wide variety of fields that require this.

JP 2007-313739 A JP 2008-101068 A JP 2006-54239 A JP 2010-238720 A

  By the way, the present applicant has paid attention to an abietan compound derived from natural resources and succeeded in making it a polymer. And the physical property of the polymer was confirmed, and it discovered that high heat resistance and moisture-proof water resistance could be expressed (Unexamined-Japanese-Patent No. 2011-26569, Unexamined-Japanese-Patent No. 2011-74249). Through subsequent research and development, the present inventors succeeded in making the polymer into a film molded body, and found that the film can be used to make a laminate with extremely high transparency. As a result, this film material is considered to be suitable for applications requiring all of heat resistance, moisture resistance, water resistance, adhesion, and transparency, such as the above-mentioned transparent flexible printed circuit board, and the present invention is made. It came.

  That is, the present invention relates to a transparent insulating laminate having environmental compatibility by using a plant-derived compound, excellent in heat resistance and moisture and water resistance, and exhibiting high adhesion and transparency, and a flexible print using the same. The purpose is to provide a substrate.

（Ｒ^Ａ及びＲ^Ｂは炭素原子数１〜６のアルキル基もしくはアルキレン基を表す。ｎは０〜３を表す。ｍは０〜５を表す。環Ｃｙはヘテロ原子を含んでもよい飽和もしくは不飽和の６員環もしくは７員環を表す。式中、＊，＊＊は主鎖に組み込まれる結合手を表す。＊はＲ^Ａから延びる結合手であってもよい。）
〔３〕デヒドロアビエチン酸に由来する骨格が下記式Ａ１又はＡ２で表される繰り返し単位である〔１〕または〔２〕に記載の積層体。

（式中、Ｌ^１１、Ｌ^１２、Ｌ^２１、Ｌ^２２、及びＬ^２３は、２価の連結基を表す。＊は主鎖に組み込まれる結合手を表す。）
〔４〕式Ａ１中、連結基Ｌ^１１が式中２位で示される炭素原子と結合した〔３〕に記載の積層体。
〔５〕式Ａ２中、連結基Ｌ^２３が式中２位及び２’位で示される炭素原子と結合した〔３〕に記載の積層体。
〔６〕式Ａ１中のＬ^１１が、＊−Ｌ^１３−ＣＯ−＊＊または＊−ＣＯ−Ｌ^１３−＊＊（＊はヒドロフェナントレン環側の結合手を表す。＊＊はその逆の結合手を表す。）で表され、Ｌ^１３が、アルキレン基、アルケニレン基、アルキニレン基、アリーレン基、酸素原子、カルボニル基、又は単結合であり、Ｌ^１２がカルボニル基もしくはカルボニルオキシ基である〔３〕または〔４〕に記載の積層体。
〔７〕式Ａ２中のＬ^２１及びＬ^２２がカルボニル基もしくはカルボニルオキシ基であり、Ｌ^２３が酸素原子、硫黄原子、カルボニル基、スルホニル基、アルキレン基、アルケニレン基、アリーレン基、又は単結合である〔３〕または〔５〕に記載の積層体。
〔８〕さらに、特定重合体が、ポリオール化合物由来もしくはポリカルボン酸由来の共重合成分を含む〔１〕〜〔７〕のいずれか１項に記載の積層体。
〔９〕共重合成分が、下記式（ＩＩ）で表される〔８〕に記載の積層体。

［Ｇ^１はアルキレン基、アルケニレン基、アリーレン基、ヘテロアリーレン基、またはこれらを組み合わせた連結基を表す。Ｘ、Ｙ、Ｚはそれぞれ独立に、−Ｏ−、−Ｓ−、−ＮＲ−、−（Ｃ＝Ｏ）−、−Ｏ（Ｃ＝Ｏ）−、−（Ｃ＝Ｏ）Ｏ−、−（Ｃ＝Ｏ）ＮＲ−、及びこれらの組合せからなる群より選ばれる二価の連結基を表す。Ｒは水素原子もしくは炭素数１〜６のアルキル基、炭素数６〜２４のアリール基を表す。＊は主鎖に組み込まれる結合手である。ｍｚは０〜３の整数である。］
〔１０〕式（ＩＩ）が下記式（Ｂ１）で表される〔９〕に記載の積層体。

（Ｌ^３は、酸素原子、カルボニル基、スルホニル基、アルキレン基、又は単結合である。Ｌ^３が複数存在するとき、そのそれぞれは同じでも異なっていてもよい。Ｒ^１及びＲ^２は、それぞれ独立して、ハロゲン原子、アルキル基、アルコキシ基を表し、互いに結合して環を形成していてもよい。Ｒ^１及びＲ^２が複数存在するとき、そのそれぞれは同じでも異なっていてもよい。ｎ１及びｎ２はそれぞれ独立して０〜４の整数を表す。ｎ３は０〜２の整数を表す。＊は主鎖に組み込まれる結合手を表す。）
〔１１〕透明支持体が、セルロースアシレート、ポリカーボネート、ポリアミド、ポリエステル、ポリイミド、及びポリ乳酸からなる群から選ばれる少なくとも１種を含有するものである〔１〕〜〔１０〕のいずれか１項に記載の積層体。
〔１２〕〔１〕〜〔１１〕のいずれか１項に記載の積層体と導電性膜とを具備するプリント基板。
〔１３〕透明支持体の少なくとも片面側に設けて利用される透明絶縁膜であって、デヒドロアビエチン酸に由来する骨格を主鎖に含む特定重合体を含有してなる透明絶縁膜。
〔１４〕透明支持体の少なくとも片面側に設けて利用される透明絶縁膜形成用ドープであって、デヒドロアビエチン酸に由来する骨格を主鎖に含む特定重合体を有機溶媒中に溶解したドープ。 The above problems have been solved by the following means.
[1] A transparent insulating laminate having a transparent insulating layer on at least one side of a transparent support, wherein the transparent insulating layer contains a specific polymer containing a skeleton derived from dehydroabietic acid in the main chain body.
[2] The transparent insulating laminate according to [1], wherein the skeleton derived from dehydroabietic acid includes a structure represented by the following formula (U).

(R ^A and R ^B represent an alkyl group or alkylene group having 1 to 6 carbon atoms. N represents 0 to 3. m represents 0 to 5. The ring Cy may be a saturated or unsaturated group that may contain a hetero atom. Represents a saturated 6-membered ring or 7-membered ring, wherein * and ** represent a bond incorporated in the main chain, and * may be a bond extending from ^RA .
[3] The laminate according to [1] or [2], wherein the skeleton derived from dehydroabietic acid is a repeating unit represented by the following formula A1 or A2.

(In the formula, L ¹¹ , L ¹² , L ²¹ , L ²² , and L ²³ represent a divalent linking group. * Represents a bond incorporated in the main chain.)
[4] The laminate according to [3], wherein in formula A1, the linking group L ¹¹ is bonded to the carbon atom shown at the 2-position in the formula.
[5] The laminate according to [3], wherein in formula A2, the linking group L ²³ is bonded to the carbon atoms represented by the 2-position and the 2′-position in the formula.
[6] L ^{11 in} Formula A1 is * -L ¹³ -CO-** or * -CO-L ¹³ -** (* represents a bond on the hydrophenanthrene ring side. ** is the reverse bond. L ¹³ is an alkylene group, an alkenylene group, an alkynylene group, an arylene group, an oxygen atom, a carbonyl group, or a single bond, and L ¹² is a carbonyl group or a carbonyloxy group [3] ] Or the laminate according to [4].
[7] L ²¹ and L ^{22 in} Formula A2 are a carbonyl group or a carbonyloxy group, and L ²³ is an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, an alkylene group, an alkenylene group, an arylene group, or a single bond The laminate according to [3] or [5].
[8] The laminate according to any one of [1] to [7], wherein the specific polymer further includes a copolymer component derived from a polyol compound or a polycarboxylic acid.
[9] The laminate according to [8], wherein the copolymer component is represented by the following formula (II).

[G ¹ represents an alkylene group, an alkenylene group, an arylene group, a heteroarylene group, or a linking group obtained by combining these. X, Y, and Z are each independently —O—, —S—, —NR—, — (C═O) —, —O (C═O) —, — (C═O) O—, — ( C = O) NR- and a divalent linking group selected from the group consisting of these. R represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 24 carbon atoms. * Is a bond incorporated in the main chain. mz is an integer of 0-3. ]
[10] The laminate according to [9], wherein the formula (II) is represented by the following formula (B1).

(L ³ is an oxygen atom, a carbonyl group, a sulfonyl group, an alkylene group, or a single bond. When a plurality of L ³ are present, each of them may be the same or different. R ¹ and R ² are each Independently, it represents a halogen atom, an alkyl group or an alkoxy group and may be bonded to each other to form a ring, and when a plurality of R ¹ and R ² are present, each may be the same or different. n1 and n2 each independently represents an integer of 0 to 4. n3 represents an integer of 0 to 2. * represents a bond incorporated in the main chain.)
[11] The transparent support comprises at least one selected from the group consisting of cellulose acylate, polycarbonate, polyamide, polyester, polyimide, and polylactic acid. Any one of [1] to [10] The laminated body as described in.
[12] A printed board comprising the laminate according to any one of [1] to [11] and a conductive film.
[13] A transparent insulating film that is provided on and used on at least one side of a transparent support, and contains a specific polymer containing a skeleton derived from dehydroabietic acid in the main chain.
[14] A dope for forming a transparent insulating film which is used by being provided on at least one side of a transparent support, wherein a specific polymer containing a skeleton derived from dehydroabietic acid in the main chain is dissolved in an organic solvent.

  The transparent insulating laminate and the flexible printed circuit board using the same according to the present invention use a plant-derived compound and have environmental compatibility that greatly contributes to the reduction of the equivalent emission amount of carbon dioxide. Furthermore, it has excellent effects of being excellent in heat resistance and moisture and water resistance, and exhibiting high adhesion and transparency.

It is sectional drawing which showed typically the transparent insulation laminated body as one Embodiment of this invention. It is sectional drawing which showed typically the transparent insulation laminated body as another embodiment of this invention. It is the perspective view which showed typically the flexible printed circuit board as one Embodiment of this invention. It is sectional drawing of the width direction of the cast film and manufacturing apparatus for demonstrating the manufacturing process of a cast film.

  The transparent insulating laminate of the present invention has a transparent insulating layer made of a specific polymer using a plant-derived compound on at least one side of the transparent support. As a result, all of heat resistance, moisture resistance, water resistance, and transparency were realized at the same time. This reason includes an unclear point, but is estimated as follows. That is, in the above specific polymer, a unique matrix is created in the resin by two-dimensionally connecting three structurally stable tricyclic moieties having a skeleton derived from dehydroabietic acid as a mother character. This is probably because of this. There is no such material, and conventional biomass polymers obtained using biomass resources are usually inferior in heat resistance. Although the specific polymer used in the present invention can use a raw material derived from biomass resources, it exhibits excellent heat resistance as described above. Further, it should be noted that it has high transparency while having high heat resistance. This is difficult to achieve with polyimide resins that have been widely used in the past. Hereinafter, it demonstrates in detail centering on the preferable embodiment of this invention.

[Specific polymer]
(Repeating unit containing a skeleton derived from dehydroabietic acid)
The specific polymer of the present invention uses dehydroabietic acid represented by the following formula (AA) or a derivative thereof as a raw material monomer. Even a homopolymer obtained by polymerizing this may be a copolymer obtained by polymerizing the raw material monomer and another monomer. That is, the specific polymer has a repeating unit containing a skeleton derived from dehydroabietic acid in its molecular structure.

  Here, in the present invention, the “skeleton derived from dehydroabietic acid” only needs to have a structure derived from the above-mentioned dehydroabietic acid, in other words, dehydroabietic acid within a range where a desired effect is achieved. Any structural skeleton that can be derivatized from the above is acceptable. Preferable examples include the following. (AA-1), (AA-3), and (AA-10) are preferred, and (AA-1) is most preferred.

  The “skeleton derived from dehydroabietic acid” may further have a substituent. Examples of the substituent that may be included include an alkyl group, an alkoxy group, a halogen atom, a hydroxyl group, a carbonyl group, a nitro group, and an amino group.

  The specific polymer of the present invention preferably includes a structure represented by the following formula (U) as a skeleton derived from the dehydroabietic acid.

Ｒ^Ａ及びＲ^Ｂは炭素原子数１〜６のアルキル基もしくはアルケニル基を表す。ｎは０〜３を表す。ｍは０〜５を表す。環Ｃｙはヘテロ原子を含んでもよい飽和もしくは不飽和の６員環もしくは７員環を表す。式中、＊，＊＊は主鎖に組み込まれる結合手を表す。＊はＲ^Ａから延びる結合手であってもよい。Ｒ^Ｂはメチル基であることが好ましい。Ｒ^Ａは炭素原子数１〜４のアルキル基であることが好ましく、ｉ−プロピル基であることがより好ましい。Ｃｙはシクロヘキサン環もしくはシクロヘキセン環であることが好ましく、シクロヘキサン環であることがより好ましい。ｎ，ｍは１であることが好ましい。

R ^A and R ^B represent an alkyl group or alkenyl group having 1 to 6 carbon atoms. n represents 0-3. m represents 0-5. Ring Cy represents a saturated or unsaturated 6-membered or 7-membered ring which may contain a hetero atom. In the formula, * and ** represent a bond incorporated into the main chain. * May be a bond extending from ^RA . R ^B is preferably a methyl group. ^RA is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably an i-propyl group. Cy is preferably a cyclohexane ring or a cyclohexene ring, and more preferably a cyclohexane ring. n and m are preferably 1.

The above formula (U) is preferably the following formula (U1). R ^A , R ^B , m, and n are as defined in the above formula (U). R ^C has the same meaning as R ^B. p is an integer of 0 to 2, and is preferably 0.

  Furthermore, the above formula (U) is preferably the following formula (U2).

式中、＊，＊＊は結合手を表す。

In the formula, * and ** represent a bond.

  Dehydroabietic acid is one of the components constituting rosin contained in pine resin of plant origin. That is, since a material of natural origin can be used as its substrate, it is offset in the amount of carbon dioxide emission, and the equivalent emission amount can be greatly reduced as compared with a plastic material of fossil fuel origin. It is an environmentally-friendly material derived from biomass resources that is desired as a next-generation material. The skeleton derived from the above dehydroabietic acid and the skeleton represented by the formulas U, U1 or U2 may be collectively referred to as a dehydroabietane main skeleton, and this may be abbreviated as “DHA main skeleton”. There is.

  Furthermore, examples of the skeleton structure important in a preferred embodiment of the present invention include those represented by the following formulas U3 and U4. The thing of the following formula U3 is called a dehydroabietane skeleton (DA skeleton), and the thing of the formula U4 is called a dehydroabietic acid skeleton (DAA skeleton).

The specific polymer is preferably selected from a polymer containing a repeating unit represented by the following formula A01 or A02, more preferably selected from a polymer containing a repeating unit represented by the formula A11 or A12. It is particularly preferable that the polymer is selected from polymers containing a repeating unit represented by A1 or A2. In the following formulae, R ^A , R ^B , R ^C , m, n, and p have the same meanings as the above formulas (U) and (U1). R ^C has the same meaning as R ^B.

In the formula, L ¹¹ , L ¹² , L ²¹ , L ²² , and L ²³ represent a divalent linking group. * Represents a bond. Although the preferable range of these coupling groups is described in description of preferable embodiment of each polymer postscript, when it shows collectively what is preferable, it is as follows.

(1) When it is a repeating unit derived from polycarboxylic acid L ¹¹ : * -CO-L ¹³ -** or * -L ¹³ -CO-** (L ¹³ represents a linking group. For details, see below. )
L ¹² , L ²¹ , L ²² : Carbonyl group L ²³ : Oxygen atom, sulfur atom, carbonyl group, sulfonyl group, alkylene group, alkenylene group, arylene group, or single bond (2) When a repeating unit derived from a polyol L ¹¹ : * -L ^1A -O-** (L ^1A represents a linking group. For details, see below.)
^{L 12, L 21, L 22} : * - CH 2 -O - **
L ²³ is as defined above.

In Formula A1, the linking group L ¹¹ is preferably bonded to the carbon atom shown at the 2-position in the formula. In Expression A2, it is preferred that the linking group L ²³ is bonded to the carbon atom represented by the 2-position and 2'-position in the formula.

  The structural unit having the DHA main skeleton may constitute a homopolymer alone, but in the present invention, it is preferred that the copolymer component together constitute a copolymer. Specifically, it is preferable to form a polyester together with the polycarboxylic acid and polyol exemplified below. Preferred examples of the copolymer component include those represented by the following formula (II).

  The specific polymer A in the present invention may have a structural unit represented by the following formula (II) as a copolymerization component.

・ G ¹
G ¹ is an alkane linking group (alkanediyl, alkanetriyl, alkanetetrayl, etc.), an alkene linking group (alkenediyl, alkenetriyl, alkenetetrayl, etc.), an aryl linking group (aryldiyl, aryltriyl, aryltetrayl, etc.) ), A heteroaryl linking group (heteroaryldiyl, heteroaryltriyl, heteroaryltetrayl, etc.). When G ¹ is an alkane linking group, a combination thereof, or an alkene linking group, it may be chained or cyclic, and when it is chained, it may be linear or branched. One or more hydrogen atoms of the alkane linking group, alkene linking group, aryl linking group, or heteroaryl linking group may be substituted with a specific substituent or may be unsubstituted. Examples of the substituent when substituted include the substituent T described later, and among them, an alkyl group and an alkenyl group are preferable. In addition, one or more carbon atoms constituting the alkane linking group and the alkene linking group may be substituted with a heteroatom, and examples of the heteroatom when substituted include an oxygen atom, a nitrogen atom, and a sulfur atom. Of these, an oxygen atom is preferable (typically, a part of the alkylene chain is linked to an ether bond and linked). In addition, carbon number means that the number of carbon atoms is not included when it has a substituent.

When G ¹ is an alkane linking group (preferably an alkylene group) or an alkene linking group (preferably an alkenylene group), it preferably has 2 to 30 carbon atoms, more preferably 2 to 20 carbon atoms. As described above, the alkylene group and alkenylene group may be substituted or unsubstituted, and a part thereof may be substituted with a hetero atom. More specifically, — (CH ₂ ) ₄ —, — (CH ₂ ) ₅ —, — (CH ₂ ) ₈ —, — (CH ₂ ) ₁₀ —, — (CHRa) CH ₂ —, —CH ₂ — _{rb-CH 2 -, - (} CH 2 CH 2 O) 2 -CH 2 CH 2 -, - (CH 2 CH 2 O) 3 -CH 2 CH 2 - is more preferable. Ra is preferably an alkyl group or alkenyl group having 6 to 18 carbon atoms, and includes C ₁₈ H ₃₇ , C ₁₆ H ₃₃ , C ₁₂ H ₂₅ , C ₈ H ₁₇ , C ₁₈ H ₃₅ , C ₁₆ H ₃₁ , C ₁₂ H _23, and more preferably _C 8 _{H 15.} Rb is preferably a cycloalkylene group having 4 to 12 carbon atoms, and more preferably a cyclohexanediyl group.

When G ¹ is an aryl linking group (preferably an arylene group) or a heteroaryl linking group (preferably a heteroarylene group), it preferably has 3 to 24 carbon atoms, and more preferably 6 to 12 carbon atoms. Specific examples include a substituted or unsubstituted benzene linking group (preferably a phenylene group). G ¹ may be a linking group obtained by combining an alkane linking group, an alkene linking group, an aryl linking group, and a heteroaryl linking group. Examples include a linking group in which an alkane linking group (preferably an alkylene group) and an aryl linking group (preferably an arylene group) are combined, and the like. -Ph-Me-Ph- (Ph: phenylene group, Me: methylene group) ), -Ph-Pr-Ph- (Ph: phenylene group, Pr: propane-2,2-diyl group) and the like.

・ X, Y, Z
X, Y, and Z are each independently —O—, —S—, —NR—, — (C═O) —, —O (C═O) —, — (C═O) O—, — ( C = O) NR- and a divalent linking group selected from the group consisting of these. Preferably, -O-,-(C = O) O-,-(C = O) NH-, or-(C = O)-. R represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 24 carbon atoms.

・ Mz
mz represents an integer of 0 to 3.

  When the formula (II) is derived from a polyol, those represented by the following formula (II-1) are preferable.

  When the formula (II) is derived from a polycarboxylic acid, those represented by the following formula (II-2) are preferred.

  When the formula (II) is derived from polyamine, those represented by the following formula (II-3) are preferred.

The copolymer component preferably includes a ring structure, and preferably has an aromatic or aromatic heterocyclic structure. It is preferred that the ring structure is present within the predetermined linking group G ^1. In the present specification, the term “linking group” broadly means that connects two structural portions, and is used in the sense of including atoms and single bonds.

(Molecular weight etc.)
As long as the specific polymer in the present invention includes the DHA main skeleton so as to constitute a part of the main chain, the bonding mode is not particularly limited. The weight average molecular weight of the specific polymer is not limited, but is preferably 5,000 to 700,000, more preferably 10,000 to 500,000. When the weight average molecular weight is in this range, it is excellent in heat resistance, moldability, etc. suitable for a flexible printed circuit board, and further, high moisture resistance, water resistance and transparency are realized and improved. In addition, the weight average molecular weight in this invention is the value obtained by the molecular weight measurement (polystyrene conversion) by gel permeation chromatography (GPC). Unless otherwise specified in the present specification, N-methyl-2-pyrrolidone is used as a carrier, and the molecular weight is a value using TSK-gel Super AWM-H (trade name) manufactured by Tosoh Corporation as a column. Indicates.

  The glass transition temperature (Tg) is not limited, but is preferably 100 ° C. or higher, more preferably 150 to 400 ° C., and still more preferably 150 to 350 ° C. When the glass transition temperature is within this range, the polyester polymer is particularly excellent in heat resistance and can be suitably used for a flexible printed circuit board or the like. In addition, the said glass transition temperature uses a differential scanning calorimeter, and the temperature increase rate is 10 degree-C / min. Under nitrogen stream about the temperature range of 30-400 degreeC. It is measured as an endothermic peak observed under the conditions. In the present specification, unless otherwise specified, the TG measurement is a value measured using a product name: DSC6300 manufactured by SII.

Wherein at density of the specific polymer is not limited, preferably 1.25 g / cm ³ or less, more preferably ^{0.90g / cm 3 ~1.25g / cm 3} , more preferably 1.00 g / ^cm 3 to 1 20 g / cm ³ . When the density is in this range, the specific polymer is excellent in heat resistance, moldability and the like, and further, moisture resistance, water resistance and transparency are realized, and it becomes favorable for use in a flexible printed circuit board and the like. In addition, the density of a polyester-type polymer says the value measured using a precision specific gravity meter (the SHIMAZU company make, brand name: precision specific gravity meter AUW120D). In addition, the density here presupposes the density of the film shape | molded by the hot press.

  The specific polymer includes a derivative obtained by further subjecting a polymer having a repeating unit containing a DHA main skeleton to chemical treatment.

  The total content of the DHA main skeleton constituting the specific polymer or a repeating unit having a dimer skeleton thereof (for example, a repeating unit represented by the formula (A1) and a repeating unit represented by the formula (A2)) is Although not particularly limited, it should be 10 mol% or more from the viewpoint of heat resistance and density with respect to the total amount of the structural part constituting the repeating unit (for example, the total amount of repeating units derived from the dicarboxylic acid compound of the ester polymer below). Is preferably 20 mol% or more, more preferably 30 mol% or more, and still more preferably 40 mol% or more.

  The specific polymer may be a copolymer containing at least one other repeating unit that does not contain the DHA main skeleton, if necessary.

  In the present specification, when a molecule or its structure is specified by adding “compound” at the end or the like, it is used to mean a salt, a complex or an ion thereof in addition to the compound itself. In addition, it is meant to include a derivative with a predetermined substituent or modified in a predetermined form within a range where a desired effect is exhibited. In the present specification, when a specific group of atoms is referred to with the word “group” added to the end of a substituent or a linking group, it means that the group may have an arbitrary substituent. Examples of the substituent that may be further included in the linking group include the following substituent T.

Examples of the substituent T include the following.
An alkyl group (preferably an alkyl group having 1 to 20 carbon atoms, such as methyl, ethyl, isopropyl, t-butyl, pentyl, heptyl, 1-ethylpentyl, benzyl, 2-ethoxyethyl, 1-carboxymethyl, etc.), alkenyl A group (preferably an alkenyl group having 2 to 20 carbon atoms, such as vinyl, allyl, oleyl, etc.), an alkynyl group (preferably an alkynyl group having 2 to 20 carbon atoms, such as ethynyl, butadiynyl, phenylethynyl, etc.), A cycloalkyl group (preferably a cycloalkyl group having 3 to 20 carbon atoms, such as cyclopropyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, etc.), an aryl group (preferably an aryl group having 6 to 26 carbon atoms, for example, Phenyl, 1-naphthyl, 4-methoxyphenyl, -Chlorophenyl, 3-methylphenyl, etc.), a heterocyclic group (preferably a heterocyclic group having 2 to 20 carbon atoms, preferably a 5- or 6-membered heterocycle having at least one oxygen atom, sulfur atom, nitrogen atom) A cyclic group is preferable, for example, 2-pyridyl, 4-pyridyl, 2-imidazolyl, 2-benzimidazolyl, 2-thiazolyl, 2-oxazolyl, etc., an alkoxy group (preferably an alkoxy group having 1 to 20 carbon atoms, for example, Methoxy, ethoxy, isopropyloxy, benzyloxy, etc.), aryloxy groups (preferably aryloxy groups having 6 to 26 carbon atoms, such as phenoxy, 1-naphthyloxy, 3-methylphenoxy, 4-methoxyphenoxy, etc.), An alkoxycarbonyl group (preferably an alkoxycarbonyl having 2 to 20 carbon atoms) Nyl groups such as ethoxycarbonyl, 2-ethylhexyloxycarbonyl, etc., amino groups (preferably including amino groups having 0 to 20 carbon atoms, alkylamino groups, arylamino groups, such as amino, N, N-dimethyl Amino, N, N-diethylamino, N-ethylamino, anilino, etc.), sulfamoyl groups (preferably sulfonamido groups having 0 to 20 carbon atoms, such as N, N-dimethylsulfamoyl, N-phenylsulfamoyl) Etc.), an acyl group (preferably an acyl group having 1 to 20 carbon atoms, such as acetyl, propionyl, butyryl, benzoyl, etc.), an acyloxy group (preferably an acyloxy group having 1 to 20 carbon atoms, such as acetyloxy, Benzoyloxy, etc.), carbamoyl groups (preferably C 1-20 carbon atoms) Rubamoyl groups such as N, N-dimethylcarbamoyl and N-phenylcarbamoyl), acylamino groups (preferably having 1 to 20 carbon atoms, such as acetylamino and benzoylamino), sulfonamido groups (preferably Is a sulfamoyl group having 0 to 20 carbon atoms, such as methanesulfonamide, benzenesulfonamide, N-methylmethanesulfonamide, N-ethylbenzenesulfonamide, etc., an alkylthio group (preferably an alkylthio having 1 to 20 carbon atoms). Groups such as methylthio, ethylthio, isopropylthio, benzylthio, etc., arylthio groups (preferably arylthio groups having 6 to 26 carbon atoms, such as phenylthio, 1-naphthylthio, 3-methylphenylthio, 4-methoxyphenylthio ), An alkyl or arylsulfonyl group (preferably an alkyl or arylsulfonyl group having 1 to 20 carbon atoms, such as methylsulfonyl, ethylsulfonyl, benzenesulfonyl, etc.), a hydroxyl group, a cyano group, a halogen atom (for example, a fluorine atom, chlorine) Atoms, bromine atoms, iodine atoms, etc.), more preferably alkyl groups, alkenyl groups, aryl groups, heterocyclic groups, alkoxy groups, aryloxy groups, alkoxycarbonyl groups, amino groups, acylamino groups, hydroxyl groups or halogen atoms. And particularly preferably an alkyl group, an alkenyl group, a heterocyclic group, an alkoxy group, an alkoxycarbonyl group, an amino group, an acylamino group or a hydroxyl group.
In addition, each of the groups listed as the substituent T may be further substituted with the substituent T described above.

  When the compound or substituent / linking group contains an alkyl group / alkylene group, alkenyl group / alkenylene group, etc., these may be cyclic or chain-like, and may be linear or branched, and substituted as described above. It may be substituted or unsubstituted. Moreover, when an aryl group, a heterocyclic group, etc. are included, they may be monocyclic or condensed and may be similarly substituted or unsubstituted.

(Connected form)
There are five linking groups L ¹¹ , L ¹² , L ²¹ , L ²² , and L ²³ in Formulas A01, A11, A1 (hereinafter Formula A1 and the like), A02, A12, and A2 (hereinafter Formula A2 and the like). but for the four connecting group other than L ^23, (1) polyester-based polymer [I], (2) polyester-based polymer [II], those respectively preferred in the three (3) polyamide-based polymer Different. Among these, in the present invention, (1) a polyester polymer is preferable in that high performance is obtained, and the contents of a preferable linking group will be described below in that order. In the present specification, the polyester may have an oxycarbonyl group as a linking group and may have a polycarbonate structure. The same applies to polyamide, as long as the amide group is included in the linking group, and may be a polyimide structure, a polyurea structure, a polyurethane structure, or the like.

(1) Polyester polymer [I]
<Repeating unit derived from polycarboxylic acid compound>
・ L ¹¹
L ^{11 in} Formula A1 and the like is preferably * -CO-L ¹³ -** or * -L ¹³ -CO-**. * Represents a bond on the 5,6,7,8,9,10-hexahydrophenanthrene ring (mother nucleus) side. ** represents the opposite bond.
・ L ¹³
L ¹³ is preferably an alkylene group, an alkenylene group, an alkynylene group, an arylene group, an oxygen atom, a carbonyl group, a single bond, or a combination thereof.

The alkylene group and alkenylene group may be linear or branched, or cyclic. L ¹³ is an alkylene group having 2 to 10 carbon atoms, an alkenylene group having 2 to 10 carbon atoms, an arylene group having 6 to 18 carbon atoms, an oxygen atom, a carbonyl group, or a single bond, or those bonds, from the viewpoint of heat resistance A combination is preferred. More preferably, it is a chain alkylene group or carbonyl alkylene group having 2 to 4 carbon atoms, a cyclic alkylene group or carbonyl alkylene group having 5 to 6 carbon atoms, or a chain alkenylene group or carbonyl alkenylene group having 2 to 4 carbon atoms. , A cyclic alkenylene group or a carbonylalkenylene group having 5 to 6 carbon atoms, an arylene group or carbonylarylene group having 6 to 10 carbon atoms, an oxygen atom, or a single bond.

Specific examples of the linking group represented by L ¹³ include the following, but the present invention is not construed as being limited thereto. In the following exemplary chemical structural formulas, the bond * is the side bonded to the hydrophenanthrene ring side, and the bond ** means the opposite side.

L ¹³ in formula (A1) or the like is preferably a single bond, (L1-ex-4), (L1-ex-10) or (Ll-ex-12) from the viewpoint of heat resistance. More preferably, it is a bond. More preferably, L ¹¹ is * -CO-**, * -CO-**, * -CO-Rd-COO-** (Rd is an alkylene group having 1 to 6 carbon atoms).

Formula A1 Hitoshichu, linking group L ¹¹ may be one that binds to any carbon atom of the 1-position and 4-position in the formula, but which was coupled with 2-position or the carbon atoms represented by the 4-position It is preferable that it is bonded to a carbon atom shown at the 2-position. This bonding position is the same for (2) polyester polymer [II] and (3) polyamide polymer described later. The position numbers of the carbon atoms in the above formula correspond to the 11th position, the 2nd position is the 12th position, the 3rd position is the 13th position, and the 4th position is the 14th position with respect to the position number of the abietane.

・ L ¹²
L ¹² is preferably a carbonyl group.

  Another preferred embodiment of the polyester-based polymer [I] is that a dimer structure in which two dehydroabietane main skeletons are bonded directly or via a linking group is repeated as a part of the main chain. It is included in the unit. The repeating unit containing this dimer structure is represented by the above formula (A2), for example.

· ^{L 21, L 22}
L ²¹ and L ^{22 in} Formula A2 and the like are preferably carbonyl groups. This means that the specific polymer of this embodiment has a repeating unit containing a DAA skeleton, like L ¹² above.

・ L ²³
L ²³ is preferably an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, an alkylene group, an alkenylene group, an arylene group, or a single bond. The alkylene group and alkenylene group may be linear or branched, or cyclic. From the viewpoint of heat resistance, the linking group represented by L ²³ is an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, an alkylene group having 1 to 10 carbon atoms, an alkenylene group having 2 to 10 carbon atoms, and 6 carbon atoms. It is preferable to be comprised from at least 1 sort (s) selected from the group which consists of -18 arylene groups, an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, a C1-C4 chain | strand-shaped alkylene group, carbon number 5 At least one selected from the group consisting of a cyclic alkylene group having 6 to 6 carbon atoms, a chain alkenylene group having 2 to 4 carbon atoms, a cyclic alkenylene group having 5 to 6 carbon atoms, and an arylene group having 6 to 8 carbon atoms. It is more preferably a divalent linking group composed of or a single bond.

The alkylene group, alkenylene group and arylene group constituting the linking group represented by L ²³ may have a substituent, if possible. Examples of the substituent in the alkylene group, alkenylene group, and arylene group include the substituent T. Specific examples of the linking group represented by L ^23, may be mentioned the following linking groups, the present invention is not limited thereto.

L ²³ is preferably (L2-ex-2), (L2-ex-5), (L2-ex-9) or (L2-ex-11) from the viewpoint of heat resistance, and (L2 -Ex-2) is more preferable.

In the formula A2 and the like, the linking group L ²³ may be bonded to any carbon atom in the 1-position, 2-position, 4-position, 1′-position, 2′-position, and 4′-position in the formula. Preferred are those bonded to the carbon atoms shown in the 4th, 4th, 2 'and 4' positions (however, it is a combination connecting two hydrophenanthrene rings), and the 2nd and 2 'positions. More preferably, it is bonded to the carbon atom represented by This bonding position is the same for (2) polyester polymer [II] and (3) polyamide polymer described later.

  In the repeating unit derived from the polycarboxylic acid compound constituting the polyester polymer [I], a repeating unit comprising a DHA main skeleton or a dimer skeleton thereof (for example, the repeating unit represented by the formula (A1) and the formula ( The total content of the repeating unit represented by A2) is not particularly limited, but when the total amount of the repeating unit derived from the dicarboxylic acid compound is 50 mol%, it is 10 mol% or more from the viewpoint of heat resistance and density. It is preferably 15 mol% or more, more preferably 20 mol% or more. In addition, the content rate of the structural unit derived from the polycarboxylic acid in polyester is 50 mol% normally, and it becomes an upper limit typically.

  The polyester polymer [I] of the present embodiment may be a copolymer with other polycarboxylic acid compounds. As the other polycarboxylic acid compound, a polycarboxylic acid compound usually used for constituting the polyester-based polymer [I] can be used without particular limitation. For example, synthetic polymer V (Asakura Shoten) P.I. The polycarboxylic acid compounds described in 63-91 and the like can be used.

  Examples of other polycarboxylic acid compounds include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid, and aliphatic dicarboxylic acids such as cyclohexanedicarboxylic acid, dicyclohexanedicarboxylic acid, and adipic acid. The content of the repeating unit derived from the other polycarboxylic acid compound in the polyester polymer [I] is not particularly limited as long as the effects of the present invention are not impaired. For example, the content of the repeating units derived from other polycarboxylic acid compounds is preferably 40 mol% or less in the repeating units derived from the polycarboxylic acid compounds constituting the polyester polymer [I]. More preferably, it is at most mol%.

<Repeating unit derived from polyol compound>
-Polyol compound containing a ring structure The polyester polymer [I] of the present embodiment preferably contains the above-mentioned copolymerization component (formula II, II-1) as a repeating unit derived from a polyol compound. Among these, it is preferable that the copolymer component contains at least one repeating unit derived from a polyol compound having a ring structure. The ring structure included in the polyol compound may be included in the side chain portion of the polyester polymer [I] or may be included so as to constitute a part of the main chain. Therefore, the ring structure contained in the polyol compound preferably constitutes a part of the main chain. This further improves heat resistance.

  The ring structure contained in the polyol compound may be an aliphatic ring or an aromatic ring, and may be a hydrocarbon ring or a heterocyclic ring. Further, the aliphatic ring may contain an unsaturated bond. The number of rings contained in the polyol compound is not particularly limited, but can be, for example, 1 to 5, preferably 1 to 3, and more preferably 1 to 2 from the viewpoint of heat resistance. When the polyol compound includes two or more ring structures, the structure may be a structure in which two or more monocycles are linked by a covalent bond or a linking group, or may be a condensed ring structure.

  Specific examples of the repeating unit derived from the polyol compound having a ring structure include, for example, cyclohexanediol, cyclohexanedimethanol, 1,4-bis (2-hydroxyethoxy) benzene, 1,4-bis (2-hydroxypropoxy). Examples include a repeating unit derived from benzene, 4-hydroxyethylphenol, and the like, and a repeating unit derived from a polyol compound represented by the following formula (B1). The repeating unit derived from a polyol compound having a ring structure is preferably a repeating unit derived from a polyol compound represented by the following formula (B1) from the viewpoint of heat resistance.

In Formula (B1), L ³ represents a divalent linking group composed of at least one selected from the group consisting of an oxygen atom, a carbonyl group, a sulfonyl group, and an alkylene group, or a single bond. When a plurality of L ³ are present, each L ³ may be the same or different. R ¹ and R ² each independently represent a substituent selected from the group consisting of a halogen atom, an alkyl group, and an alkoxy group, and may be bonded to each other to form a ring. When a plurality of R ¹ and R ² are present, each R ¹ and R ² may be the same or different. n1 and n2 each independently represent an integer from 0 to 4, and n3 represents an integer from 0 to 2.

The alkylene group constituting the divalent linking group in L ³ may be a linear or branched chain alkylene group or a cyclic alkylene group. Moreover, it is preferable that it is 1-6 from a heat resistant viewpoint, and, as for carbon number of an alkylene group, it is more preferable that it is 1-4. Note that the carbon number of the alkylene group here does not include the carbon number of the substituent described later. Furthermore, the alkylene group may have a substituent such as a chain or cyclic alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 18 carbon atoms. The number of substituents in the alkylene group may be two or more. When the alkylene group has two or more substituents, the two or more substituents may be the same or different, and are connected to each other to form a ring. May be.

R ¹ and R ² each independently represent a substituent selected from the group consisting of a halogen atom, an alkyl group, and an alkoxy group, but from the viewpoint of heat resistance, a fluorine atom, a chlorine atom, and a carbon number of 1 to 8 A substituent selected from the group consisting of an alkyl group and an alkoxy group having 1 to 8 carbon atoms is preferable.

  n1 and n2 represent an integer of 0 to 4, preferably an integer of 0 to 2, more preferably 0 or 1, and still more preferably 0. n3 represents an integer of 0 to 2, and is preferably 0 or 1.

  Specific examples of the repeating unit represented by the formula (B1) are shown below, but the present invention is not limited thereto.

  As the repeating unit represented by the formula (B1), from the viewpoint of heat resistance. (B1-ex-1), (B1-ex-2), (B1-ex-3), (B1-ex-4), (B1-ex-5), (B1-ex-6), ( B1-ex-7), (B1-ex-9) or (B1-ex-11) is preferred, and the above (B1-ex-1), (B1-ex-2) or (B1-ex-) is preferred. 3) is more preferable.

  The content of the copolymer component having a ring structure (repeating unit represented by formula (B1)) in the repeating unit derived from the polyol compound constituting the polyester-based polymer [I] is not particularly limited. When the total amount of the repeating unit derived from 50 mol%, from the viewpoint of heat resistance and density, it is preferably 10 mol% or more, more preferably 20 mol% or more, and 30 mol% or more. Is more preferable, and it is still more preferable that it is 40 mol% or more. In addition, the content rate of the structural unit derived from the polyol in polyester is 50 mol% normally, and it becomes an upper limit typically.

-Polyol compound not containing a ring structure The polyester-based polymer [I] may contain at least one repeating unit derived from another polyol compound not containing a ring structure. As the polyol compound not containing a ring structure, a polyol compound usually used for constituting the polyester-based polymer [I] can be used without particular limitation, and examples thereof include ethylene glycol, 1,2-propanediol, 1. 3-propanediol, 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, diethylene glycol, triethylene glycol, tetraethylene glycol, etc. And diol compounds.
In the polyester polymer [I], the content of the repeating unit derived from a polyol compound not containing a ring structure is the same as that containing the ring structure in the preferred range.

  From the viewpoint of heat resistance, the polyester polymer [I] of the present embodiment is preferably a combination having at least one of the following structures as a repeating unit derived from a polycarboxylic acid compound.

- polycarboxylic acid compound derived repeating unit formula of (A1) ··· ^{L 13} is a single bond, the formula (L1-ex-4), (L1-ex-10) or ^(L1-ex-12), L 12 is carbonyl formula (A2) ··· ^{L 23} is the formula (L2-ex-2), (L2-ex-5), (L2-ex-9) or ^(L2-ex-11), L 21 and ^{L 22} Is a repeating unit derived from a carbonyl group / polyol compound (B1-ex-1), (B1-ex-2), (B1-ex-3), (B1-ex-4), (B1-ex-5) , (B1-ex-6) or (B1-ex-11)

More preferably, it is the following.
・ Repeating unit derived from polycarboxylic acid compound Formula (A1): L ¹¹ , L ¹² are carbonyl groups Formula (A2): L ²³ is (L2-ex-2), L ²¹ and L ²² are carbonyl groups -Repeating unit derived from polyol compound Chemical formula (B1-ex-1), (B1-ex-2), (B1-ex-3) or (B1-ex-4)

  The content ratio of the repeating unit derived from the polycarboxylic acid compound and the repeating unit derived from the polyol compound constituting the polyester polymer [I] of the present embodiment (in the case of polyamide, the repeating unit derived from the polycarboxylic acid compound: derived from the polyamine compound) The repeating unit is not particularly limited, but is usually 1: 1.

(Method for producing polyester polymer [I])
The dehydroabietic acid used in the production of the polyester polymer [I] of the present embodiment can be obtained from rosin, for example. Constituents contained in rosin vary depending on the method of collection and the production area of pine, but in general, abietic acid (1), neoabietic acid (2), parastrinic acid (3), levopimaric acid (4), It is a mixture of diterpene resin acids such as dehydroapietic acid (5), pimaric acid (6), and isopimaric acid (7). Among these diterpene resin acids, each compound represented by (1) to (4) is disproportionated by heat treatment in the presence of a certain kind of metal catalyst, and dehydroabietic acid (5) To dihydroabietic acid (8) having the structure described below. That is, the dehydroabietic acid (5) necessary for producing the polyester polymer [I] of the present invention can be obtained relatively easily by subjecting rosin, which is a mixture of various resin acids, to an appropriate chemical treatment. And can be manufactured industrially at low cost. Dihydroabietic acid (8) and dehydroabietic acid (5) can be easily separated by a known method.

  For example, the step of synthesizing the polyester polymer [I] having the repeating unit represented by the above formula (A1) or (A2) and the repeating unit represented by the formula (B1) is represented by the formula (B1). The diol compound forming a repeating unit and the dicarboxylic acid compound forming the repeating unit represented by the above formula (A1) or (A2) or a dicarboxylic acid halide derivative or a diester derivative thereof as a derivative are overlapped by a known method. It can be synthesized by condensation. This series of steps can be divided into two types of schemes 1 and 2 below. The following reaction scheme is an example in the present invention, and the present invention is not construed as being limited by this description.

  As a specific method for synthesizing a polymer, for example, the method described in New Polymer Experimental Science 3, Polymer Synthesis / Reaction (2), pp. 78-95, Kyoritsu Shuppan (1996) (for example, transesterification method) , Direct esterification method, melt polymerization method such as acid halide method, low-frequency solution polymerization method, high temperature solution polycondensation method, interfacial polycondensation method, etc.). In the present invention, acid chloride method and interfacial polycondensation method are particularly suitable. Preferably used.

  The transesterification method is a method of synthesizing a polyester-based polymer [I] by subjecting a polyol compound and a polycarboxylic acid ester derivative in a molten state or a solution state to dealcoholization polycondensation by heating in the presence of a catalyst if necessary. is there.

  The direct esterification method is a method of synthesizing a polyester-based polymer [I] by dehydrating polycondensation of a polyol compound and a polycarboxylic acid compound in a molten state or a solution state in the presence of a catalyst under heating.

  In the acid halide method, a polyester polymer [I] is synthesized by heating a polyol compound and a polycarboxylic acid halide derivative in a molten state or in a solution state, if necessary, in the presence of a catalyst and dehydrohalogenating polycondensation. Is the method.

  In the interfacial polymerization method, a polyester compound [I] is prepared by dissolving a polyol compound in water, the polycarboxylic acid compound or a derivative thereof in an organic solvent, and polycondensing at a water / organic solvent interface using a phase transfer catalyst. ].

The dimer of dehydroabietic acid (DAA) in Scheme 2 can be synthesized by the method described in JP2011-26569A. Specifically, when connecting the L ²³ represents a single bond, can be advanced a catalytic amount of N, the reaction by the addition of N- dimethylformamide with oxalyl chloride. When L ²³ is a methylene group, a method of replacing the oxalyl chloride with dichloromethane is exemplified. Alternatively, as in the following synthesis example, DAA may be mixed with formalin and the reaction may be advanced by adding a catalytic amount of trifluoroacetic acid.

(2) Polyester polymer [II]
In the present embodiment, the linking groups are preferably as follows.
・ L ¹¹
L ¹¹ is * -L ^1A -O-**. * Represents a bond on the hydrophenanthrene ring side, and ** represents the opposite bond. The single bond or divalent linking group represented by L ^1A is not particularly limited, but examples of the linking group _include- (C _n H _2n )-, -CO (C _n H _2n )-, (here N is an integer of 1 to 12, preferably 1 to 8, which may be linear, branched or cyclic, and may further have a substituent, and may be one of the carbon atoms constituting the molecular chain. One or more may be replaced with an oxygen atom). When the atom bonded to L ^1A is an oxygen atom, it is preferably — (CH ₂ ) ₄ —, — (CH ₂ ) ₅ —, — (CH ₂ ) ₆ — or the like. When the atom bonded to L ^1A is a carbonyl group, preferably — (CH ₂ ) ₃ —, — (CH ₂ ) ₄ —, — (CH ₂ ) ₅ —, —CO (CH ₂ ) ₂ —, —CO ( CH ₂ ) ₃ —, —CO (CH ₂ ) ₄ — and the like.

^{· L 12, L 21, L} 22
L ¹² is * —CH ₂ —O — **. * Represents a bond on the hydrophenanthrene ring side, and ** represents the opposite bond.

・ L ²³
L ²³ is (1) have the same meanings as polyester polymers [I], the preferred range is also the same.

(Production method of polyester polymer [II])
The polymer of this embodiment is compoundable by the following scheme 3, for example. The following are examples of reaction pathways, and the present invention is not construed as being limited thereto. In addition, although the following has illustrated the aspect shown by the said Formula (A1), since it is the same except making it a dimer which has two abietan main frame | skeleton, it abbreviate | omits about the thing of Formula (A2). The dimerization is the same as the polyester polymer [I].

  Synthesis of the dicarboxylic acid form (i) can be carried out in the same manner as (I) of the polyester. The reaction from the dicarboxy compound (i) in which a carboxy group is introduced into abietic acid to the dialkoxy compound (ii) may be performed by a normal reduction reaction. For example, the reduction reaction can be rapidly advanced by reducing with aluminum hydride. For the reaction for obtaining the polyester (iii) from the dialkoxy compound (ii) by the reaction with the polycarboxylic acid chloride compound, for example, the synthesis examples described later can be referred to.

  The process of reacting the dialkoxy compound with terephthalic acid dichloride is the same as described in the polyester polymer [I]. In addition, a dicarboxylic acid may be reacted to cause an esterification reaction to proceed or a transesterification reaction may be performed, and the reaction is the same as described in the polyester-based polymer [I]. .

(3) Polyamide polymer In the present embodiment, the linking groups are preferably as follows.
・ L ¹¹
L ¹¹ is the (1) has the same meaning as ^{L 11} in the polyester polymer [I], the preferred range is also the same. However, in this embodiment, in the present embodiment, a single bond, (L1-ex-4), (L1-ex-10) or (L1-ex-12) is used in this embodiment from the viewpoint of heat resistance. ), And more preferably a single bond.
^{· L 12, L 21, L} 22, L 23
^{L 12, L 21, L 22} , L 23 , the above (1) have the same meanings as ^{L 12, L 21, L 22} , L 23 in the polyester polymer [I], the preferred range is also the same.

  A repeating unit having a DHA main skeleton or a dimer skeleton constituting the polyamide polymer (for example, a repeating unit represented by the formula (A1), a repeating unit represented by the formula (A2), and the formula (A3) The total content of the repeating unit represented by formula (1) is not particularly limited, but when the total amount of the repeating unit derived from the dicarboxylic acid compound is 50 mol%, it may be 10 mol% or more from the viewpoint of heat resistance and density. Preferably, it is 15 mol% or more, and more preferably 20 mol% or more.

The polyamide polymer includes two or more dicarboxylic acids selected from the group consisting of a repeating unit represented by the formula (A1), a repeating unit represented by the formula (A2), and a repeating unit represented by the formula (A3). It may contain a repeating unit derived from an acid compound. When the polyamide-based polymer contains two or more repeating units derived from a dicarboxylic acid compound, the content ratio thereof is appropriately selected according to the purpose.
Further, when the polyamide-based polymer contains two or more repeating units derived from a dicarboxylic acid compound, even if they are repeating units represented by the same formula, they are repeating units represented by different formulas. May be.

The polyamide-based polymer contains at least one repeating unit derived from a polycarboxylic acid compound containing a skeleton derived from dehydroabietic acid, but if necessary, other skeletons not containing a skeleton derived from dehydroabietic acid It may contain at least one repeating unit derived from a polycarboxylic acid compound.
As the other polycarboxylic acid compound, a polycarboxylic acid compound usually used for constituting a polyamide-based polymer can be used without particular limitation. For example, synthetic polymer V (Asakura Shoten) P.I. The polycarboxylic acid compounds described in 63-91 and the like can be used.

Examples of other polycarboxylic acid compounds include aromatic dicarboxylic acids such as phthalic acid, terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid, cyclohexanedicarboxylic acid, dicyclohexanedicarboxylic acid, succinic acid, adipic acid, and sebacin. Aliphatic dicarboxylic acids such as acid, brassic acid, maleic acid, and fumaric acid.
The content of repeating units derived from other polycarboxylic acid compounds in the polyamide polymer is not particularly limited as long as the effects of the present invention are not impaired. For example, the content of repeating units derived from other polycarboxylic acid compounds is preferably 40 mol% or less, preferably 30 mol% or less in the repeating units derived from the polycarboxylic acid compound constituting the polyamide polymer. It is more preferable that

  The polyamide polymer of this embodiment can be obtained by reacting a monomer (polycarboxylic acid) constituting a repeating unit composed of the DHA main skeleton or a dimer skeleton thereof with a diamine compound. For this polymerization reaction, a known reaction method can be appropriately utilized. The method for obtaining the polycarboxylic acid compound can be derived from abietic acid obtained from rosin as described in (1) Polyester polymer [I] [II].

  As the polyamine compound that can be applied to the polyamide polymer, a polyamine compound that is usually used for the constitution of the polyamide polymer can be used without any particular limitation. ) (Baifukan) Examples include the polyamine compounds described in 241-257.

The polyamine compound may be an aliphatic polyamine compound or an aromatic polyamine compound. The aliphatic polyamine compound may be a chain or a ring.
The aliphatic polyamine compound may be a chain polyaminoalkylene derivative or a cyclic polyaminoalkylene derivative, and may further contain an unsaturated bond. The number of carbon atoms of the polyaminoalkylene derivative is not particularly limited, but is preferably 2 to 20, more preferably 2 to 14, and still more preferably 2 to 10 from the viewpoints of heat resistance and moldability.

  Examples of the aromatic polyamine compound include polyaminoarylene derivatives. Among these, from the viewpoint of heat resistance and moldability, a polyaminoarylene derivative having 6 to 24 carbon atoms is preferable, and a polyaminoarylene derivative having 6 to 18 carbon atoms is more preferable.

  Further, the polyamine compound may be a polyamine compound in which two kinds selected from a group derived from an aliphatic monoamino compound and a group derived from an aromatic monoamino compound are bonded via a divalent linking group. Examples of the divalent linking group include a divalent linking group composed of at least one selected from the group consisting of an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, an alkylene group, an alkenylene group, and an arylene group. be able to.

  The alkylene group and alkenylene group constituting the divalent linking group may be a chain or a ring. When the alkylene group and alkenylene group are chain-like, the number of carbon atoms is preferably 2-6. Moreover, when an alkylene group and an alkenylene group are cyclic | annular, it is preferable that the carbon number is 5-8.

When the polyamine compound is formed by bonding two groups selected from a group derived from an aliphatic monoamino compound and a group derived from an aromatic monoamino compound via a divalent linking group, two fats constituting the polyamine compound A group derived from an aromatic monoamino compound or a group derived from an aromatic monoamino compound may be linked to each other to form a ring.
Furthermore, the polyamine compound may have a substituent, and examples of the substituent include the substituent T.

  Specific examples of the polyamine compound preferably used in the present invention are shown below, but the invention is not limited thereto.

  The polyamine compound in the present invention includes a polyaminoalkylene derivative having 2 to 14 carbon atoms, a polyaminoarylene derivative having 6 to 24 carbon atoms, a group derived from an aliphatic monoamino compound, and an aromatic monoamino from the viewpoint of heat resistance and moldability. It is preferable that at least one selected from the group consisting of polyamine compounds in which two or more selected from groups derived from a compound are bonded via a linking group. The linking group is preferably composed of at least one selected from the group consisting of an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, an alkylene group, an alkenylene group, and an arylene group.

  The repeating unit derived from the polyamine compound in the polyamide polymer may be used alone or in combination of two or more. When the polyamide-based polymer has repeating units derived from two or more kinds of polyamine compounds, the content ratio thereof is appropriately selected according to the purpose.

  JP, 2011-026569, A can be referred to for the details of the above-mentioned (1) manufacturing method and compound of polyester system polymer [I]. (2) For details of the production method and the compound of the polyester polymer [II], JP-A-2011-074249 can be referred to.

[Transparent insulation layer]
The laminated film of the present invention has a transparent insulating layer containing the specific polymer. Although the thickness of this transparent insulating layer is not specifically limited, It is preferable that it is 5-200 micrometers, and it is more preferable that it is 10-100 micrometers. By making this thickness below the upper limit, it is preferable because the substrate can be lightened and flexible. On the other hand, it is preferable that the support value and the strength are ensured by setting the above lower limit value or more. The film thickness in the present invention is a value measured with a digital linear gauge DG-525H (manufactured by Ono Sokki). The measurement is performed at three locations, and the average value is obtained.

  Although content of a specific polymer in the said transparent insulating layer is not specifically limited, It is preferable that it is 1-99 mass% with respect to the whole quantity of solid content, and it is more preferable that it is 5-80 mass%. By making this amount below the above upper limit value, the characteristics of the support can be imparted, which is preferable. On the other hand, by setting it to the above lower limit value or more, heat resistance and moisture / water resistance can be imparted.

  In the present invention, it is preferable to use a dope containing the specific polymer for forming the transparent insulating layer. Although the solvent for melt | dissolving a specific polymer is not specifically limited, The following organic solvents are mentioned. Examples of the organic solvent include aromatic hydrocarbons such as xylene, naphthalene and toluene, phthalic acid esters such as dioctyl phthalate, dimethoxyoxyethyl phthalate and dimethyl phthalate, phosphate esters such as triphenyl phosphate and tricresyl phosphate, Polyhydric alcohol esters such as glycerol triacetate, ethyl phthalyl ethyl glycolate or methyl phthalyl ethyl glycolate, mineral oils such as kerosene and kerosene, ketones such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone, methylene chloride, chloroform or 1, Halogenated hydrocarbons such as 1-dichloroethane, esters such as methyl acetate or ethyl acetate, N-methyl-2-pyrrolidone (NMP), N, - dimethylformamide (DMF), N, and the like such as nitrogen compounds N- dimethylacetamide (DMAc).

These solvents can be used alone or as a mixed solvent of two or more solvents. Although content of the specific polymer in the said dope is not specifically limited, It is preferable that it is 1-50 mass% with respect to dope whole quantity, and it is more preferable that it is 5-30 mass%. By making this amount below the above upper limit value, it is preferable because the viscosity can be kept low and application suitability can be secured. On the other hand, it is preferable that the amount of the volatile solvent is reduced by setting it to the above lower limit or more.
In addition to the above resin and solvent, a filler, an antioxidant, a UV absorber, a dye, a pigment, an antistatic agent, a flame retardant and the like may be blended in the resin composition of the present invention. The addition amount is usually about 0.01% by mass to 50% by mass, preferably about 0.1% by mass to 10% by mass, based on the resin composition. More preferably, it is desirable to blend about 0.5 mass% to 10 mass%.

[Laminated film]
The laminated film of the present invention preferably has moisture and water resistance, heat shrinkage resistance, low dielectric constant, high solder resistance, transparency and adhesion. The performance characteristics in each item can be measured and evaluated by the method shown in the examples.
The moisture and water resistance is preferably 1.0% or less, more preferably 0.5% or less under the conditions shown in the examples. Although there is no particular lower limit, it is practical that it is 0.05% or more.
The heat shrinkability is preferably less than 0.15% and more preferably 0.1% or less under the conditions shown in the examples. Although there is no particular lower limit, it is practical that it is 0.01% or more.
The dielectric constant is preferably less than 3.5 under the conditions shown in the examples, and more preferably 3.2 or less. Although there is no particular lower limit, it is practical that it is 2.5 or more. Looking at each frequency, within the above range, it is the same as above at 1 MHz, preferably 3.0 or less at 1 GHz, and more preferably 2.8 or less at 10 GHz. .
The dielectric loss tangent is preferably 0.011 or less, more preferably 0.008 or less under the conditions shown in the examples. Although there is no particular lower limit, it is practical that it is 0.001 or more.
About the total light transmittance which shows transparency, it is preferable that it is 50% or more on the conditions shown in the Example, and it is more preferable that it is 85% or more. Although there is no particular lower limit, it is practical that it is 30% or more.

[Support]
For the support used in the present invention, a cellulose acylate film is preferably used because of its good heat resistance and transparency. The cellulose acylate is an aliphatic carboxylic acid ester or aromatic carboxylic acid ester having about 2 to 22 carbon atoms, and is particularly preferably a lower fatty acid ester of cellulose. The lower fatty acid in the lower fatty acid ester of cellulose means a fatty acid having 6 or less carbon atoms. For example, cellulose acetate, cellulose propionate, cellulose butyrate, cellulose acetate phthalate, etc. Mixed fatty acid esters such as cellulose acetate propionate and cellulose acetate butyrate described in JP-A-8-231761, U.S. Pat. No. 2,319,052 can be used. Alternatively, esters of aromatic carboxylic acid and cellulose described in JP-A No. 2002-179701, JP-A No. 2002-265639, and JP-A No. 2002-265638 are also preferably used.
Among the above descriptions, the lower fatty acid esters of cellulose particularly preferably used are cellulose triacetate and cellulose acetate propionate described later. In addition, these cellulose esters can also be mixed and used.

The degree of substitution (DS) of cellulose acylate means the proportion of acylation of three hydroxyl groups present in the cellulose structural unit (glucose having β1 → 4 glycosidic bonds). The degree of substitution can be calculated by measuring the amount of bound fatty acid per unit mass of cellulose. The measurement method is carried out according to ASTM-D817-91.
Cellulose acylate balances the humidity dependency of the optical properties and the dimensional stability of the film by appropriately balancing the hydrophobicity of the acyl group and the hydrophilicity of the hydroxyl group. That is, if the alkyl chain in the acyl group is too short on average and / or if the hydroxyl group ratio is too high, the humidity dependence of the optical properties will increase.
On the other hand, if the alkyl chain in the acyl group is too long on average and / or the hydroxyl group ratio is too high, Tg is lowered and the dimensional stability is deteriorated.

  Accordingly, the cellulose acetate preferably used in the present invention preferably has a degree of acetylation of 2.30 or more and 3.00 or less and no other acyl group having 3 or more carbon atoms. The degree of acetylation is more preferably 2.40 or more and 2.95 or less.

In addition, cellulose esters other than cellulose triacetate have an acyl group having 2 to 4 carbon atoms as a substituent, the substitution degree of acetyl group is X, and the substitution degree of propionyl group is Y. It is a cellulose ester that satisfies both a) and (b).
Formula (a): 2.6 ≦ X + Y ≦ 2.9
Formula (b): 0 ≦ X ≦ 2.5
Among them, cellulose acetate propionate (total acyl group substitution degree = X + Y) satisfying 1.9 ≦ X ≦ 2.5 and 0.1 ≦ Y ≦ 0.9 is preferable. The portion not substituted with an acyl group usually exists as a hydroxyl group. These can be synthesized by known methods.

  The thickness of the support is preferably 5 to 300 μm, more preferably 10 to 150 μm. If the thickness of the base film is equal to or greater than the lower limit, problems such as a decrease in film strength are unlikely to occur. If the thickness is equal to or less than the upper limit, the mass increases excessively, particularly for large televisions of 20 inches or more. It is preferable because it is less likely to cause adverse effects

When a solution (dope) of cellulose acylate film is used for forming a support, the solvent having the property of dissolving or swelling the solution is as follows:
Ethers having 3 to 12 carbon atoms: specifically, dibutyl ether, dimethoxymethane, dimethoxyethane, diethoxyethane, propylene oxide, 1,4-dioxane, 1,3-dioxolane, 1,3,5-trioxane , Tetrahydrofuran, anisole and phenetole,
Ketones having 3 to 12 carbon atoms: specifically, acetone, methyl ethyl ketone, diethyl ketone, dipropyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, methylcyclohexanone, methylcyclohexanone, etc.
Esters having 3 to 12 carbon atoms: specifically, ethyl formate, propyl formate, n-pentyl formate, methyl acetate, ethyl acetate, methyl propionate, propion brewed ethyl, n-pentyl acetate, γ-butyrolactone, etc. ,
Organic solvent having two or more kinds of functional groups: Specifically, methyl 2-methoxyacetate, methyl 2-ethoxyacetate, ethyl 2-ethoxyacetate, ethyl 2-ethoxypropionate, 2-methoxyethanol, 2-propoxyethanol 2-butoxyethanol, 1,2-diacetoxyacetone, acetylacetone, diacetone alcohol, methyl acetoacetate, N-methylpyrrolidone, and ethyl acetoacetate.

  These can be used alone or in combination of two or more. As a solvent for dissolving the transparent substrate film, tetrahydrofuran or a ketone solvent is preferable, and methyl ethyl ketone and cyclohexanone are particularly preferable.

  As a solvent that does not dissolve the transparent substrate film (preferably triacetyl cellulose), methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, tert-butanol, 1-pentanol, 2-methyl- 2-butanol, cyclohexanol, isobutyl acetate, methyl isobutyl ketone, 2-octanone, 2-pentanone, 2-hexanone, 2-heptanone, 3-pentanone, 3-heptanone, 4-heptanone, toluene, propylene glycol monomethyl ether acetate Can be mentioned. These can be used alone or in combination of two or more.

  The mass ratio (A / B) of the total amount (A) of the solvent that dissolves the transparent base film and the total amount (B) of the solvent that does not dissolve the transparent base film is preferably 20/80 to 100/0, and 30/70. ~ 100/0 is more preferable, and 40/60 to 100/0 is still more preferable.

  Regarding the film material using the cellulose acylate, for example, Japanese Patent Application Laid-Open No. 2004-284212, Japanese Patent Application Laid-Open No. 2008-15383, and the like can be referred to.

  The other support material is not particularly limited, but in the present invention, the cellulose acylate, polyamide, polyester, polycarbonate, polyimide, and polylactic acid may be selected in order to comprehensively bring out the effects of the present invention. preferable. Examples of the polyamide include polyamides described in the polyamide resin handbook. Examples of the polyester include polyesters described in the polyester resin handbook, and polyarylate, polyethylene naphthalate, and polyethylene terephthalate are particularly preferable from the viewpoint of transparency. As polyimide, in addition to commercially available colored polyimides such as Upilex (Ube Industries) and Kapton (Toray DuPont), Neoprim (Mitsubishi Gas Chemical), Aurum (Mitsui Chemicals), and colorless and transparent polyimide disclosed in JP2007-313739 Etc. Examples of polylactic acid include Lacia 100 (trade name) manufactured by Mitsui Chemicals. Of these, cellulose acylate and polyimide are preferable, and cellulose acylate is particularly preferable.

[Lamination method]
Examples of the method for laminating the film include the following methods.

-Dry lamination In this method, the adhesive is diluted to an appropriate viscosity with an organic solvent, applied to a film, and after drying, it is pressure-bonded to the other film. There are polyester adhesives, polyether adhesives, etc., and the performance of the laminate film can be changed depending on the properties of the adhesive used, such as heat resistance, chemical resistance and deep drawability.
There are two types of dry laminates: a general method of diluting with an organic solvent, and a solventless type in which an organic solvent is not used and the viscosity is adjusted to an appropriate value by heating. Recently, there is also an emulsion type (aqueous type in which an adhesive is dispersed in water).

Extrusion laminating Extrusion laminating includes polylamination that coats the melted PE on one side of the film and polysandrami that pours the melted PE between the films.

・ Hot melt laminate Dry laminate is applied by dissolving the adhesive in an organic solvent, but hot melt is applied with an appropriate viscosity while heating the adhesive. There is no need for a drying step and it can be used immediately after cooling. Mechanical equipment is also simple. In addition to laminating, a hot melt resin is often coated. Although it has drawbacks such as lack of heat resistance and low strength, it is often used as an easy peel material for yogurt aluminum lids.

・ Thermal laminate Depending on the type of resin, it can be bonded by applying heat and pressing without using an adhesive. Thermal lamination is performed using the adhesive force.

Next, the manufacturing process by the co-casting method will be described.
In the present embodiment, a plurality of dopes are sent to a feed block (not shown), and cast in a plurality of layers from the casting die 31 onto the casting drum 34 (see FIG. 4). It is preferable to keep the surface of the casting drum substantially constant in the range of -12 ° C to 0 ° C. The casting bead is cooled on the casting drum 34, and a gel-like casting film 44 is formed within a short time. Here, an example of a three-layer configuration is shown. The casting film 44 moves as the casting drum 34 rotates. By being cooled during this movement, the gel progresses and self-supporting property is imparted to the casting film 44. As a result, the production speed can be increased. Here, the smaller the temperature difference between the casting drum 34 and the dope, the more effectively the dope is cooled, so the time for forming the casting film is shortened. In addition, if the cast film is formed by cooling gelation, it is difficult to peel off because there is no unevenness in drying compared to the method of drying until the cast film has self-supporting property by drying air, etc. improves.

  The rotational speed of the casting drum 34 is preferably maintained at 60 m / min or more. Thereby, the casting bead 70 having a stable shape can be formed without reducing the production rate, and the casting film 44 having excellent flatness can be obtained. As the rotation speed is increased, the rotation support structure of the casting drum 34, accompanying wind suppression during high-speed rotation, or vibration of the support itself may occur. Adjust the rotation speed while checking these levels. It is preferable to do. When a casting band is used as the support, the rotational speed is equal to the traveling speed of the casting band. Note that the stability of the support during high-speed rotation is superior to that of the casting band by the casting drum. If the casting drum is used as in this embodiment, the rotational speed is stabilized at 80 m / min or more. Thus, the casting film 44 can be formed.

  The casting film 44 having a self-supporting property is peeled off from the casting drum 34 while being supported by a peeling roller (not shown) to form a wet film (not shown). The wet film containing a large amount of the solvent is sent to a tenter (not shown) after drying is promoted. In the tenter, drying is performed while the pins are inserted and fixed to both end portions of the wet film. Here, tension can be applied to the width direction of the wet film by adjusting the interval between the pins facing each other.

  The wet film that has been dried is cut at both ends to remove pin puncture scratches and the like. In the drying chamber, while the wet film is conveyed, the film surface temperature is heated to 60 to 145 ° C. As a result, the wet film is sufficiently dried to obtain a film (not shown). Thereafter, the film is cooled to approximately room temperature in a cooling chamber. Then, after the charged voltage is adjusted to a predetermined range by the forced static eliminator, the knurling is applied by the knurling application roller.

  In the present embodiment, the surface layer dope 70a, the base layer dope 70b, and the support layer dope 70c that are maintained in the three-layer state by the casting die 31 are placed on the casting drum 34 from the discharge port 31a of the casting die 31. Co-cast. The surface layer dope 70a has a solid content concentration C1 in the range of 18% by mass or more and 20% by mass or less, and is 2% by mass or more and 5% by mass or less than the solid content concentration C2 in the base layer dope 70b. It is preferable to use a lowered one. In this way, the surface layer dope 70a having the solid content concentration C1 adjusted has a very high fluidity and can realize a high leveling effect in the surface layer 44a. For this reason, generation | occurrence | production of the diagonal nonuniformity in the surface layer 44a is suppressed effectively. However, if the concentration C1 of the surface layer dope 70a exceeds 21% by mass, the fluidity decreases, so that an effective leveling effect cannot be obtained. On the other hand, if C1 is less than 18% by mass, it is difficult to form a stable casting bead. For this reason, in any case, it is difficult to prevent oblique unevenness. Here, even if C1 satisfies the predetermined range, if it is lower than C2 by more than 5% by mass, there is a possibility that a large difference occurs in the fluidity of the two and simultaneous casting becomes difficult, If it is less than 2% by mass, the leveling effect may not be exhibited, which is not suitable. Moreover, the stable casting bead 70 is formed by making solid content concentration C2 of base layer dope 70b higher than concentration C1 of surface layer dope 70a. For this reason, the effect which prevents the fall of the planarity in the casting film 44 is acquired.

  In order to obtain a better leveling effect, the viscosity of the surface layer dope 70a is preferably 30 Pa · s or more and 60 Pa · S or less. The above viscosity is a value measured as the shear viscosity of the dope. The viscosity may be measured with a known viscometer.

  As shown in FIG. 4, the casting film 44 formed in this embodiment includes a surface layer 44a, an inner layer 44d composed of a base layer 44b, and a support layer 44c. Here, the thickness t1 (μm) of the surface layer 44a is preferably 2% or more and 10% or less of the total thickness t (μm) of the casting film 44. If a dope satisfying the concentration range as described above is used and the ratio of the surface layer 44a to the total thickness of the cast film is controlled, a high leveling effect in the surface layer 44a immediately after casting can be obtained, so that occurrence of oblique unevenness is effective. Is suppressed. However, if the above ratio exceeds 10% or less than 2%, the surface layer is too thick or too thin, so that an effective leveling effect cannot be obtained. The thickness of each layer constituting the casting film 44 can be suitably adjusted, for example, by controlling the flow rate of the dope, the rotation speed of the casting drum, and the like. The ratio of the film thickness is a value calculated by (t1 / t) × 100.

  The inner layer does not need to be a multilayer and may be a single layer. In this case, the inner layer may be composed only of the base layer 44b in the present embodiment. However, if the support layer 44c is provided as in the present embodiment, the effect of improving the peelability can be obtained by including a peeling accelerator or the like therein.

  Structure of casting die, decompression chamber, support, etc. relating to production of film of this embodiment, co-casting, peeling method, stretching, drying conditions of each step, handling method, curling, winding method after flatness correction To the solvent recovery method and the film recovery method are described in detail in paragraphs [0617] to [0889] of JP-A-2005-104148, and these descriptions can also be applied to the present invention.

  Reference is made to JP-A-10-34859 for dry lamination, and JP-A-2006-7547 for extrusion lamination. Other examples include hot melt laminate, wet laminate, wax laminate, and thermal laminate. In addition to the above, for the co-casting method, JP-A-2008-254429, and for coating, JP-A-2007-152886 and JP-A-2007-152877 are useful.

<Flexible printed circuit board>
Basic Structure FIG. 1 schematically shows a laminate 10 in one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a laminate 20 in another embodiment. Reference numeral 1 denotes a transparent insulating layer, and 2 denotes a transparent support layer. Furthermore, as a flexible printed circuit board (FPC) 100 according to an embodiment of the present invention, a transparent insulating laminate (base film layer) 10, a conductive material layer (metal foil layer) 12, an adhesive layer 13, and an overcoat layer ( A configuration including the cover film layer) 11 can be given (see FIG. 3). However, this invention is not limited to this, It can be set as the arbitrary laminated structures employable as FPC. For example, it may be an FPC composed of only four layers of a base film layer, a metal foil layer, an adhesive layer, and a cover film layer. For example, FPC comprised from five layers, a base film layer, an adhesive bond layer, a metal foil layer, an adhesive bond layer, and a cover film layer, may be sufficient.

  Furthermore, if necessary, a configuration in which two or three or more of the above FPCs are stacked may be used. In such a case, for example, a plurality of the four-layer type FPC or the five-layer type FPC may be stacked, and the FPC and the FPC may be bonded with an adhesive as necessary. Further, for example, the four-layer type FPC or the five-layer type FPC may be bonded back to back by bonding the bottoms of two base film layers with an adhesive layer.

In addition, for example, if the above five-layer type FPC is used, the first FPC cover film layer, the first FPC cover film side adhesive layer, the first FPC metal foil layer, the first FPC Adhesive layer on base film side, base film layer of first FPC, adhesive layer for bonding base films of first FPC and second FPC, base film layer of second FPC , A total of 11 of the adhesive layer on the base film side of the second FPC, the metal foil layer of the second FPC, the adhesive layer on the cover film side of the second FPC, and the cover film layer of the second FPC It can be set as the structure by which a layer is laminated | stacked in order.
-Conductor layer As a conductor layer used for this embodiment, the arbitrary conductive materials which can be used for a circuit board can be used, for example, metal foil can be used. As the metal foil, any conventionally known metal foil can be used. Examples of the material include copper foil, aluminum foil, steel foil, nickel foil and the like, and composite metal foil obtained by combining these and metal foil treated with other metals such as zinc and chromium compounds are also used. be able to. It is also possible to form a transparent FPC by using a transparent conductive film such as ITO.

  Although there is no limitation in particular about the thickness of the metal foil used as a conductor layer, Preferably it is 1 micrometer or more, More preferably, it is 3 micrometers or more, More preferably, it is 10 micrometers or more. Moreover, it is preferably 50 μm or less, more preferably 30 μm or less, and still more preferably 20 μm or less. If the thickness is too thin, it may be difficult to obtain sufficient electrical performance of the circuit. On the other hand, if the thickness is too thick, the processing efficiency at the time of circuit fabrication may be reduced.

  The metal foil is usually provided in the form of a ribbon, but the form of the metal foil used when producing the FPC of the present invention is not particularly limited. In the case of using a ribbon-like metal foil, the length is not particularly limited. Also, the width of the ribbon-like metal foil is not particularly limited, but is generally preferably about 25 to 300 cm, and particularly preferably about 50 to 150 cm.

-Adhesive layer Although an adhesive layer is not used in FPC of this embodiment, in order to improve the adhesiveness between each layer, you may use an adhesive layer. As an arrangement | positioning of an adhesive bond layer, the base film side, ie, between a base film and a conductor layer, or a cover film side, ie, a part of cover film, etc. are mentioned, for example. As the adhesive constituting the adhesive layer, a conventionally known adhesive can be used as an adhesive for FPC. In the present invention, it is desirable to use an adhesive having high transparency. Examples of such adhesives include acrylonitrile butadiene rubber (NBR) adhesives, polyamide adhesives, polyester adhesives, acrylic adhesives, and polyester polyurethane adhesives. In these, it is preferable to use the adhesive agent containing an epoxy resin and an acrylic resin. By using an epoxy resin and an acrylic resin in combination, the acrylic resin absorbs the internal strain of the epoxy resin that may be distorted by thermal cycling, and can give flexibility to the resulting adhesive cured product, and is transparent The property can be improved.
The adhesive on the base film side and the adhesive on the cover film side may be different from each other, but it is preferable to use the same adhesive.

  The thickness of the adhesive layer is not particularly limited as long as it does not hinder the performance of the FPC. The thickness after absolute drying is preferably 0.01 μm or more, and more preferably 0.1 μm or more. Moreover, it is preferably 50 μm or less, more preferably 30 μm or less, and further preferably 10 μm or less. If the thickness is too thin, it may be difficult to obtain sufficient adhesiveness. On the other hand, if the thickness is too thick, processability (drying property, coating property) and the like may be deteriorated. .

  JP-A-2007-313739, JP-A-2008-101068, JP-A-2006-54239, JP-A-2010-238720, etc. can be referred to for the lamination of the metal (copper foil) when forming the printed circuit board. In addition, a metal may be directly coated, or a film may be prepared and bonded through an adhesive.

  In the laminate of the present invention, a polymer having a dehydroabietane main skeleton (DHA main skeleton) is laminated on the above-mentioned triacetyl cellulose (TAC) or diacetyl cellulose (DAC), without impairing transparency, heat resistance, transparency. Wetness and adhesion can be improved. Thereby, it is possible to exhibit excellent performance in a wide range of applications such as the above-mentioned flexible printed circuit board, optical films such as display devices, protective films, and transparent members in various industrial applications.

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

<Synthesis example 1> DAA monomer synthesis | combination 12-carboxydehydroabietic acid (a-1) used for the synthesis | combination of a dehydroabietic acid polymer was synthesize | combined according to the following synthetic pathway.

  26.8 g of oxalyl chloride was added dropwise at room temperature to a mixture of 60.0 g of 92% dehydroabietic acid ((A), Arakawa Chemical Industries) and 120 ml of methylene chloride. After stirring for 3 hours, the solvent was distilled off under reduced pressure, and 32.0 g of methanol was added dropwise thereto. After stirring at room temperature for 3 hours, excess methanol was distilled off under reduced pressure to obtain 62.8 g of white crystals of compound (B).

  To a mixture of 62.8 g of compound (B), 18.8 g of acetyl chloride and 160 ml of methylene chloride, 58.6 g of anhydrous aluminum chloride was added in small portions at 3 to 5 ° C. After stirring at 5-8 ° C. for 2 hours, the reaction solution was poured into 1000 g of ice water. The organic layer was extracted by adding 400 ml of ethyl acetate. After washing with brine and drying over anhydrous magnesium chloride, the solvent was distilled off under reduced pressure, and 100 ml of cold methanol was added to the residue, and the precipitated white crystals of compound (C) were collected by filtration (yield 65.6 g).

  64.0 g of sodium hydroxide was dissolved in 200 ml of water, and 51.2 g of bromine was added dropwise thereto at 8 to 10 ° C. Furthermore, the liquid which melt | dissolved 35.6g of compounds (C) in 200 ml of dimethoxyethane was dripped at 10-12 degreeC. After stirring at room temperature for 2 hours, the reaction solution was poured into 6N cold dilute hydrochloric acid to acidify, and the precipitated white crystals were collected by filtration. The crystals were recrystallized from methanol to obtain 29.8 g of compound (D) crystals.

  100 g of 10 wt% aqueous sodium hydroxide was added to 20.4 g of compound (D) and stirred. Thereafter, the reaction system was heated at an external temperature of 130 ° C. and gently refluxed. The mixture was stirred for 3 hours as it was, the reaction was checked by thin layer chromatography, and then the temperature of the reaction system was cooled to room temperature. The contents of the reaction system were slowly added to 250 mL of cooled 1N hydrochloric acid to cause acid precipitation. It was filtered with Nutsche and washed with water to neutralize the filtrate. The solid was taken out and dried to obtain 19.2 g of 12-carboxydehydroabietic acid (a-1).

<Synthesis Example 2>

  13.76 g of the crystal of compound (a-1) was dispersed in 160 ml of methylene chloride, 11.18 g of oxalyl chloride and 0.6 ml of dimethylformamide were added, and the mixture was heated to reflux for 5 hours. During this time, the crystals were completely dissolved. After allowing to cool, the solvent was distilled off under reduced pressure, 20 ml of ethyl acetate and 60 ml of n-hexane were added to the residue, and a white precipitate of acid chloride (a-1 ') of compound (a-1) was collected by filtration and dried under reduced pressure. Yield was 13 g.

  Dicarboxylic acid (a-2) was synthesized according to the following synthesis route.

  200 ml of trifluoroacetic acid was added dropwise at 10 to 15 ° C. to a mixture of 120 g of 92% dehydroabietic acid (the above chemical formula (A), manufactured by Arakawa Chemical Industries), 20 ml of 36% formalin and 200 ml of methylene chloride. After stirring at 15 to 20 ° C. for 8 hours, methylene chloride and trifluoroacetic acid were distilled off under reduced pressure. 2 l of water was added to the residue, and off-white crystals were filtered and thoroughly washed with water. After drying, 1 l of hot n-hexane was added and stirred for 1 hour. After cooling, white crystals of (a-2) were collected by filtration. The yield was 118g.

<Synthesis Example 3>

  Compound A (dehydroabietic acid) (42.0 g, 0.140 mol) and succinic anhydride (20.7 g, 0.207 mol) were placed in a 500 ml three-necked eggplant flask and dissolved in methylene chloride (240 ml). Anhydrous aluminum chloride (63.6 g, 0.477 mol) was added to the reaction system little by little at 10-15 ° C. After stirring at room temperature for 3 hours, the reaction solution was added to ice water, extracted with methylene chloride, separated, and the organic layer was washed with water and dried over magnesium sulfate. After distilling off the solvent under reduced pressure, methanol was added to the concentrated residue to crystallize and wash, yielding compound (a-3) (48.0 g, 0.120 mol, 85.7%).

<Synthesis Example 4>

  To a 1 L three-necked flask, 58.1 g (0.156 mol) of dehydroabietic acid dimethyl ester (a-1 ″) and 500 ml of tetrahydrofuran were added, and a toluene solution of bis (2-methoxyethoxy) aluminum sodium hydride (Sigma- 108 g (0.374 mol) of Aldrich) was added dropwise, and the temperature in the reaction system was maintained at about 30 ° C. with water cooling, and the mixture was stirred at room temperature for 3 hours and then separated with ethyl acetate / dilute hydrochloric acid. After drying with magnesium sulfate, the solvent was distilled off, and purification was performed with a mixed solvent of ethyl acetate / hexane using a silica gel column to obtain 43.0 g of compound (b-6). (Yield 87%).

<Synthesis Example 5> Synthesis of Polymer A polyester polymer (PE-1) was synthesized according to the following scheme.

  Hydroquinone 5.78 g and N, N'-dimethylaminopyridine 13.5 g were dissolved in NMP (N-methylpyrrolidone) 150 ml. The temperature in the system was cooled to 10 ° C., and 20.0 g of the acid chloride derivative (a-1 ′) of the dicarboxylic acid compound (a-1) obtained above was added little by little. The reaction solution gradually became viscous. After stirring at room temperature for 8 hours, 1 L of methanol was added to the reaction solution, and the produced polymer was separated by filtration and washed with methanol. The obtained product was dried, dissolved by heating in 100 ml of THF, and poured into 1000 ml of methanol little by little for reprecipitation. The reprecipitate was collected and dried to obtain 21.5 g of PE-1 white solid. The weight average molecular weight by GPC measurement (solvent: NMP) of the obtained polyester polymer (dehydroabietic acid polymer, PE-1) was 74,000.

  In the synthesis example of PE-1, the polyester polymers (PE-2) to (PE-10) were similarly obtained except that the dicarboxylic acid compound and the diol compound were changed to the compounds shown in Table 1 below, respectively. Obtained.

(Synthesis Example 6)
3.78 g of p-phenylenediamine (c-1) as a diamine compound was added to 180 ml of NMP and dissolved by heating to 45 ° C. in a nitrogen atmosphere. The liquid was cooled to 15 ° C., and 13.35 g of the acid chloride derivative (a-1 ′) of the dicarboxylic acid compound (a-1) was added little by little. The reaction solution gradually became viscous. After stirring at room temperature for 2 hours, 200 ml of methanol was added to the reaction solution, and the produced polymer was separated by filtration and washed with methanol. This was dried, dissolved in 100 ml of dimethylformamide by heating, and poured into 1000 ml of methanol little by little for reprecipitation. After drying, 14.3 g of a white solid of PA-1 was obtained.

  A polyamide polymer (PA-2) was obtained in the same manner as in the synthesis example except that the diamine compound was changed to the compound described in c-2.

＊１ ジカルボン酸化合物については酸クロリド誘導体として合成に用いた。
＊２ ＰＡ−１、ＰＡ−２はジアミン化合物を用いた。

* 1 Dicarboxylic acid compounds were used in the synthesis as acid chloride derivatives.
* 2 Diamine compounds were used for PA-1 and PA-2.

  In Table 1, the numbers in parentheses in the dicarboxylic acid compound, the diol compound, and the diamine compound indicate the charged amount (mol%) at the time of producing the polyester polymer and the polyamide polymer. The total amount of dicarboxylic acid compound, diol compound, and diamine compound was 100 mol%. Moreover, the structure of a dicarboxylic acid compound, a diol compound, and a diamine compound is shown below.

(Example 1 and Comparative Example 1)
The polyester polymer PE-1 obtained above was dissolved in methylene chloride at a concentration of 10%, and this was pressure filtered through a filter paper with a filtration accuracy of 0.01 mm (manufactured by Toyo Filter Paper Co., Ltd., # 63). A dope was prepared. The produced dope was cast on a copper foil using a doctor blade. After casting, the film was dried by heating at 40 ° C. for 30 minutes and at 100 ° C. for 30 minutes to form a transparent insulating layer. Subsequently, cellulose acetate (acetyl substitution degree: 2.95, manufactured by Daicel Chemical Industries) prepared in the same manner was dissolved in methylene chloride to form a dope for forming a support of 10%, and this was formed on a copper foil / PE-1 laminated film. Cast and heat-dried at 40 ° C. for 30 minutes and at 100 ° C. for 30 minutes to obtain a copper foil / PE-1 / cellulose acetate laminated film FPC-101. At this time, the thickness of the support was 50 μm.
In the same manner as above, laminated films FPC-102 to FPC-110 were produced in the same manner using polyester polymers PE-2 to PE-8.

  The base material laminated on the copper foil / PE-1 laminate was changed from cellulose acetate to polylactic acid (Mitsui Chemicals Lacia 100), and the coating solvent was changed to chloroform to produce a laminated film FPC-111.

  The base material laminated on the copper foil / PE-1 laminate was changed from cellulose acetate to polyimide in accordance with the example of JP-A-2007-313739 to produce a laminated film FPC-112.

  The polyamide polymer PA-1 obtained above was dissolved in N-methyl-2-pyrrolidone at a concentration of 10%, and this was filtered with a filter paper having a filtration accuracy of 0.01 mm (manufactured by Toyo Filter Paper Co., Ltd., # 63). The dope was produced by filtration under pressure. The produced dope was cast on a copper foil using a doctor blade. After casting, it was dried by heating at 100 ° C. for 120 minutes. Subsequently, a 10% methylene chloride dope of cellulose acetate (acetyl substitution degree 2.95, manufactured by Daicel Chemical Industries) was cast on a copper foil / PA-1 laminated film, and dried by heating at 40 ° C. for 30 minutes and at 100 ° C. for 30 minutes. Copper foil / PA-1 / cellulose acetate laminated film FPC-201 was obtained.

  Using the polyamide polymer PA-2, a laminated film FPC-202 was produced in the same manner.

(Comparative example)
A 10% methylene chloride dope of cellulose acetate (acetyl substitution degree 2.95, manufactured by Daicel Chemical Industries) is cast on a copper foil and dried by heating at 40 ° C. for 30 minutes and at 100 ° C. for 30 minutes. Film FPC-c11 was obtained. Moreover, the copper foil was changed to the glass substrate, and the cellulose acetate single film F-c11 was obtained.

  A coating solution was prepared according to the example of JP2008-158483 and applied on a copper foil to prepare a flexible printed circuit board FPC-c12. Moreover, the copper foil was changed to a glass substrate to obtain a laminated film F-c12 of PVDF / cellulose acetate.

  A base film F-c13 using polyimide and a flexible printed circuit board FPC-c13 were prepared according to the examples of JP-A-2007-313739.

  A base film F-c14 using polyethylene naphthalate and a flexible printed circuit board FPC-c14 were produced according to the examples of JP2010-238720A.

  A base film F-c15 and a flexible printed circuit board FPC-c15 using a commercially available polyimide resin film (Ube Industries, trade name: Upilex 50S) were produced.

After casting PE-1 dope on the copper foil in the same manner as in Example 1, a PET film (Toyobo Co., Ltd., Cosmo Shine A4100: 100 μm) was immediately laminated on the coated surface, and heated at 40 ° C. for 30 minutes and at 100 ° C. for 30 minutes. It was made to dry and the copper foil / PE-1 / PET laminated film FPC-113 was obtained. The thickness of the PE-1 layer was 10 μm.
The PET film alone was F-c16.

In FPC-113, PET was changed to a polyarylate (PAR) film (manufactured by Unitika, U-100: 100 μm), and a laminated film was similarly produced (FPC-114).
The PAR film alone was designated as F-c17.

In FPC-113, PET was changed to a polycarbonate (PC) film (manufactured by Teijin, Pure Ace: 100 μm), and a laminated film was similarly produced (FPC-115).
The PC film alone was designated as F-c18.

  The copper foil was changed to each film (PET, PAR, PEN, PC), and laminated films F-101 to F-115, F-201, and F-202 were obtained by the same process.

-Evaluation method-
The following evaluation was performed about the resin film of the said Example and the comparative example.

<Moisture and water resistance (water absorption%)>
About the obtained laminated | multilayer film, it immersed in the 23 degreeC water bath for 24 hours, and measured the increase rate of mass.

<Heat shrinkage>
The obtained laminated film was subjected to a temperature program with a temperature increase of 5 ° C./min, a temperature of 260 ° C. for 1 hour, and a temperature decrease of 5 ° C./min in a tensile mode using thermomechanical analysis (manufactured by SII Nanotechnology, TMA / SS7100). The shrinkage of the film was measured.

<Dielectric constant (LCR method)>
A gold electrode having a diameter of 20 mm was deposited on the surface of the obtained laminated film, and dielectric relaxation measurement was performed using an Alpha-A analyzer (manufactured by Novocontrol) to obtain a dielectric constant (1) and a dielectric loss tangent (1) at 1 MHz. The measurement temperature was room temperature (about 25 ° C.).

<Dielectric constant (cavity resonator perturbation method)>
The obtained laminated film is cut out of 1.5 mm × 80 mm, and using a network analyzer E8363B (manufactured by Agilent Technologies), cavity resonator CP431 (for 1 GHz), CP531 (for 10 GHz) (manufactured by Kanto Electronics Application Development), 1 GHz, 10 GHz The dielectric constants (2-1) and (2-2) were determined. The measurement temperature was room temperature (about 25 ° C.).

<Solder resistance>
The sample in which the metal foil of the obtained flexible substrate was etched to create a pattern was conditioned at 23 ° C. and 65% RH. Then, it was immersed in 260 degreeC and 320 degreeC solder bath, and the presence or absence of failures, such as white turbidity, peeling, and swelling, was observed. The immersion time was 60 seconds.
A: No trouble such as white turbidity, peeling or swelling B: Failure such as white turbidity, peeling or swelling

<Transparency>
For the laminated film, the total light transmittance Tt (%) was measured in accordance with JIS standard K6714-1958.
85% or more as A, less than 85%, 50% or more as B, and less than 50% as C

<Adhesion>
The adhesion between the film layers or between the support and the coating layer was evaluated by the following method.
Nitto Denko Co., Ltd. Polyester adhesive tape with 11 squares and 11 horizontal cuts at 1 mm intervals and a total of 100 squares on the surface of the coated layer. (NO.31B) is pressure-bonded, and the test for peeling off after leaving for 24 hours is repeated three times at the same place, and the presence or absence of peeling is visually observed.
A: No peeling B: Some peeling, but no problem in practical use C: All peeling

<Comprehensive evaluation>
The results of all the above evaluation items were combined, and the performance as a flexible printed circuit board was evaluated according to the following criteria.
A: It is possible to cope with a high requirement level suitably. B: It is possible to deal with a general requirement level. C: It is difficult to deal with even a general requirement level.

TAC: Triacetyl cellulose PET: Polyethylene terephthalate (Cosmo Shine A4100)
PC: Polycarbonate (Pure Ace)
PAR: Polyarylate (U-100)
PVDF: Polyvinylidene fluoride PI-1: Polyimide (Examples of JP2007-313739)
PI-2: Polyimide (Upilex 50s)
PEN: Polyethylene naphthalate PLA: Polylactic acid

  The required levels in the above table indicate the performance levels that satisfy the requirements for flexible printed circuit boards and the like. This is merely an example, and the present invention is not construed as being limited thereto. Moreover, this level can change depending on applications such as optical films other than the flexible printed circuit board.

  As can be seen from the above results, according to the example (laminated film of the present invention), it has environmental compatibility by using a plant-derived compound and has all of heat resistance, moisture resistance, water resistance, adhesion, and transparency. It turns out that it can satisfy and can respond to applications, such as a flexible printed circuit board. In particular, the polyester polymer (I) having a specific structure (test Nos. 101 to 107) exhibits extremely high performance, and is suitable for applications where severe conditions and high market needs are imposed. You can see that

(Example 2 and Comparative Example 2)
A solder resistance test and an adhesion test were performed in the same manner except that PE-1 used in Test 101 was changed as shown in the table below. As a result, in all the test bodies, the results of “A” or “B” were obtained in solder resistance (260 ° C.) and adhesion. In addition, in the following table, about the dicarboxylic acid compound, the said structural unit is specified by the general formula and its coupling group as a repeating unit derived from the compound.

DESCRIPTION OF SYMBOLS 1 Transparent insulating layer 2 Transparent support layer 10, 20 Transparent insulating laminated body 11 Overcoat (cover film layer)
12 Conductive material layer (metal foil layer)
13 Adhesive Layer 100 Flexible Printed Circuit Board

Claims (14)

  A transparent insulating laminate having a transparent insulating layer on at least one side of a transparent support, wherein the transparent insulating layer contains a specific polymer having a skeleton derived from dehydroabietic acid in the main chain. The transparent insulating laminate according to claim 1, wherein the skeleton derived from dehydroabietic acid includes a structure represented by the following formula (U).

(R ^A and R ^B represent an alkyl group or alkylene group having 1 to 6 carbon atoms. N represents 0 to 3. m represents 0 to 5. The ring Cy may be a saturated or unsaturated group that may contain a hetero atom. Represents a saturated 6-membered ring or 7-membered ring, wherein * and ** represent a bond incorporated in the main chain, and * may be a bond extending from ^RA . The laminate according to claim 1 or 2, wherein the skeleton derived from dehydroabietic acid is a repeating unit represented by the following formula A1 or A2.

(In the formula, L ¹¹ , L ¹² , L ²¹ , L ²² , and L ²³ represent a divalent linking group. * Represents a bond incorporated in the main chain.) In Expression A1, laminate according to claim 3, the linking group L ¹¹ is bonded to the carbon atom represented by the 2-position in the formula. In Expression A2, laminate according to claim 3, the linking group L ²³ is bonded to the carbon atom represented by the 2-position and 2'-position in the formula. L ^{11 in} Formula A1 is * -L ¹³ -CO-** or * -CO-L ¹³ -** (* represents a bond on the hydrophenanthrene ring side. ** represents the opposite bond. And L ¹³ is an alkylene group, an alkenylene group, an alkynylene group, an arylene group, an oxygen atom, a carbonyl group, or a single bond, and L ¹² is a carbonyl group or a carbonyloxy group. The laminated body as described in. L ²¹ and L ^{22 in} formula A2 are a carbonyl group or a carbonyloxy group, and L ²³ is an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, an alkylene group, an alkenylene group, an arylene group, or a single bond. The laminate according to 3 or 5.   Furthermore, the said specific polymer contains the copolymer component derived from a polyol compound or polycarboxylic acid, The laminated body of any one of Claims 1-7. The laminate according to claim 8, wherein the copolymer component is represented by the following formula (II).

[G ¹ represents an alkylene group, an alkenylene group, an arylene group, a heteroarylene group, or a linking group obtained by combining these. X, Y, and Z are each independently —O—, —S—, —NR—, — (C═O) —, —O (C═O) —, — (C═O) O—, — ( C = O) NR- and a divalent linking group selected from the group consisting of these. R represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 24 carbon atoms. * Is a bond incorporated in the main chain. mz is an integer of 0-3. ] The laminate according to claim 9, wherein the formula (II) is represented by the following formula (B1).

(L ³ is an oxygen atom, a carbonyl group, a sulfonyl group, an alkylene group, or a single bond. When a plurality of L ³ are present, each of them may be the same or different. R ¹ and R ² are each Independently, it represents a halogen atom, an alkyl group or an alkoxy group and may be bonded to each other to form a ring, and when a plurality of R ¹ and R ² are present, each may be the same or different. n1 and n2 each independently represents an integer of 0 to 4. n3 represents an integer of 0 to 2. * represents a bond incorporated in the main chain.)   The laminate according to any one of claims 1 to 10, wherein the transparent support contains at least one selected from the group consisting of cellulose acylate, polycarbonate, polyamide, polyester, polyimide, and polylactic acid. body.   A printed circuit board comprising the laminate according to any one of claims 1 to 11 and a conductive film.   A transparent insulating film that is used by being provided on at least one side of a transparent support, and comprising a specific polymer containing a skeleton derived from dehydroabietic acid in the main chain.   A dope for forming a transparent insulating film which is used by being provided on at least one side of a transparent support, wherein a specific polymer containing a skeleton derived from dehydroabietic acid in the main chain is dissolved in an organic solvent.

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