CN104871046A

CN104871046A - Multilayered cholesteric liquid crystal, process for producing same, and laminate of multilayered cholesteric liquid crystal

Info

Publication number: CN104871046A
Application number: CN201380065920.5A
Authority: CN
Inventors: 加藤峻也; 久保田靖浩; 中岛正雄; 冲和宏
Original assignee: Fujifilm Corp
Current assignee: Fujifilm Corp
Priority date: 2012-12-17
Filing date: 2013-12-05
Publication date: 2015-08-26
Also published as: WO2014097895A1; JP6159081B2; KR20150079876A; JP2014119605A; KR101766102B1

Abstract

A multilayered cholesteric liquid crystal which comprises at least one light reflection layer (Xa) that is a light reflection layer obtained by fixing a cholesteric liquid-crystal phase and that contains a dextrorotatory chiral agent having an HTP of 30 [mu]m-1 or more and at least one light reflection layer (Xb) that is a light reflection layer obtained by fixing a cholesteric liquid-crystal phase and that contains a levorotatory chiral agent having an HTP of 30 [mu]m-1 or more, all of the light reflection layers (Xa) and all of the light reflection layers (Xb) having a selective-reflection wavelength in the range of 400-750 nm and the selective-reflection wavelength of at least one of the light reflection layers (Xa) being equal to the selective-reflection wavelength of at least one of the light reflection layers (Xb), and in which all the adjoining light reflection layers obtained by fixing a cholesteric liquid-crystal phase have been superposed so as to be in contact with each other. In the multilayered cholesteric liquid crystal, dextrorotatory and levorotatory, inversely twisted, cholesteric liquid-crystal layers have been superposed so as to be in contact with each other without using a pressure-sensitive adhesive therebetween. This multilayered cholesteric liquid crystal has good surface properties and high transparency, selectively reflects light in the visible-light region, and has high reflection performance.

Description

Cholesteric amasss the assembly that body and manufacture method and cholesteric thereof amass body

Technical field

The present invention relates to cholesteric and amass the assembly that body and manufacture method and cholesteric thereof amass body.More specifically, the cholesteric relating to left and right anti-twist does not use jointing material and to contact with each other and lamination, in apparent good order and condition, the transparency is high, have in visible region and select the cholesteric of reflection characteristic to amass body and manufacture method thereof; There is the assembly that cholesteric that this cholesteric plural amasss body amasss body.

Background technology

The reflectance coating that cholesteric crystal is solidified reflects a kind of circularly polarized light in principle, and the another kind of light of transmission.By the pitch of cholesteric crystal is foreshortened to a certain degree, can reflect visible light.

As the technology utilizing cholesteric liquid crystal film to reflect two kinds of light, knownly utilize two-layer identical cholesteric to clamp 1/2 λ plate, make transmitted light be contrary circularly polarized light thus carry out the technology that reflects.The method has following shortcoming: under the wavelength dispersion of 1/2 λ plate is not wide band situation, can produce light leak according to wavelength.

On the other hand, as the method not using 1/2 λ plate, known to the method for at least two equal for selection reflection wavelength, torsional direction is different cholesteric laminations.As this, by selecting, reflection wavelength is equal, the method for at least two cholesteric laminations that torsional direction is different, known following method: the method arranging the cholesteric crystal of different torsional directions in the outside of base material and inner side respectively; When the cholesteric of the left distortion of lamination and right distortion, use the method for jointing material at interlayer; The method of direct other cholesteric of lamination in cholesteric.

Arrange in the method for the cholesteric crystal of different torsional directions respectively in the outside of base material and inner side, principle cannot remove base material, therefore there is the shortcoming that thickness is thickening.

As the method using jointing material when the cholesteric of the left distortion of lamination and right distortion at interlayer, the method such as, recorded in known patent document 1.Following content is described: identical and by the lamination selecting the mode of combination of the left and right of the circularly polarized light of reflection reversion to carry out the cholesteric layers of grignard orientation with the selection reflected waveband of circularly polarized light in patent documentation 1, utilize the optical element that formed thus, thus can obtain having in visible region select wavelength, be difficult to produce the performance caused because of closely sealed with adjacent component reduces and form damage, operation task excellence, while can improve the optical element of the front face brightness of area source.Use example and the accompanying drawing of jointing material when describing the cholesteric crystal of the torsion pitch different in lamination left and right in patent documentation 1, describe in [0015] section of the document: the hand of spiral is that the overlapping layer of the cholesteric of warp can form other formation by clear adhesive such as bonding coats.And the HTP of chiral agent do not recorded by patent documentation 1, and do not record the addition of chiral agent in embodiment yet.

About the method for other cholesteric of lamination direct in cholesteric, known can remove base material, can filming, the example relevant with infrared light reflection.But and do not know following example: by selecting that reflection wavelength is equal, at least two cholesteric laminations that torsional direction is different time, direct other cholesteric of lamination in cholesteric and reflect visible light region.

From will the method for reflection wavelength is equal, torsional direction is different at least two cholesteric laminations be selected different, as with the technology of arbitrary ratio reflect visible light Zone Full, the pitch of known utilization in thickness direction change cholesteric layers and make it tilt method to realize the technology (for example, see patent documentation 2) of broad reflectance.In patent documentation 2, do not use the cholesteric of jointing material and lamination visible region, but the chiral agent that the HTP employing the chiral agent of left and right is obviously less.But, change the pitch in this cholesteric layers at thickness direction and the method making it tilt needs critically to control the polymerization speed of chiral agent or liquid-crystal compounds, there is the shortcoming that yield is low.And when two cholesteric that lamination torsional direction is different, the precise hard_drawn tuhes of polymerization speed also needs twice, there is the problem of producing rate variance.

Prior art document

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2002-90535 publication

Patent documentation 2: Japanese Unexamined Patent Publication 2001-56484 publication

Summary of the invention

The problem that invention will solve

According to this situation, as the method for different at least two cholesteric of lamination torsional direction, the present inventor to adopt record in patent documentation 1 use the situation of the method for jointing material to be studied at interlayer when the cholesteric of the left distortion of lamination and right distortion, result is known, the simplification of manufacturing process and thickness increase in remain place unsatisfactory.In addition, in [0025] section of patent documentation 1, as the reason using jointing material, the skew preventing optical axis has been enumerated; Therefore, when not using jointing material, the skew that optical axis likely can occur or the surface state that one of its reason likely occurs worsen.

In addition, as the method by least two equal for selection reflection wavelength, torsional direction is different cholesteric laminations, when adopting the method for direct other cholesteric of lamination in cholesteric, when reflect visible light region, needing a large amount of chiral agent to shorten cholesteric pitch, there is the worry that orientation variation, the impaired worry of the transparency and surface state are deteriorated.

The problem that the present invention will solve be to provide the cholesteric of a kind of left and right anti-twist not use jointing material and the lamination that contacts with each other, in apparent good order and condition, the transparency is high, to have in visible region select reflection characteristic, cholesteric that reflecting properties is high amasss body.

For solving the scheme of problem

The present inventor conducts in-depth research to solve above-mentioned problem, found that, by using the chiral agent that HTP is high, thus be not limited to any theory, formation can prevent the liquid crystal liquid crystal property of adding the composition caused because of a large amount of chiral agent from reducing, maintaining the cholesterol type liquid crystal composite of liquid crystal liquid crystal property of appropriateness, can provide thus with zero defect or striped etc., the state in apparent good order and condition cholesteric of lamination left and right anti-twist, high transparency and the high visible light reflecting film of reflecting properties neatly.Namely, find: by using the chiral agent that HTP is high, the cholesteric of left and right anti-twist can be provided not use jointing material and the lamination that contacts with each other, in apparent good order and condition, the transparency is high, to have in visible region select reflection characteristic, cholesteric that reflecting properties is high amasss body, this completes of the present invention completing.

It should be noted that, as the index of the performance of expression chiral agent, usually use HTP.HTP is the abbreviation of HelicalTwisting Power (helical twisting power), is the factor representing the screw orientation ability shown in following formula.Specifically, in non-patent literature 1 " exploitation (liquid crystal ディスプレーカラー Off ィ Le ターめコレステリッ Network liquid crystal uses up anti-ying キラ Le drug development) for the cholesteric crystal photoreactivity chiral agent of LCDs color filter " (soup reality is quick, city's bridge light fragrant), explanation is had.

Formula:

HTP=1/ (the quality % concentration × pitch of the chiral agent in the solid constituent of liquid-crystal composition is long)

Wherein, the mean refractive index of the solid constituent of pitch length=selection reflection wavelength/liquid-crystal composition

The present invention as the concrete means for solving above-mentioned problem is as described below.

[1] cholesteric amasss a body, it is characterized in that, it has the reflection layer Xb of at least 1 layer reflection layer Xa and at least 1 layer, and above-mentioned reflection layer Xa is by the reflection layer of fixing of cholesteric crystal, and is 30 μm containing HTP ^-1above dextrorotatory chiral agent, above-mentioned reflection layer Xb is by the reflection layer of fixing of cholesteric crystal, and is 30 μm containing HTP ^-1above levorotatory chiral agent, the selection reflection wavelength of all above-mentioned reflection layer Xa and all above-mentioned reflection layer Xb is the scope of 400nm ~ 750nm, the selection reflection wavelength of above-mentioned reflection layer Xa of at least 1 layer is mutually equal with the selection reflection wavelength of the above-mentioned reflection layer Xb of at least 1 layer, allly adjacent the reflection layer of above-mentioned fixing of cholesteric crystal has been carried out lamination in the mode contacted with each other each other.

[2] cholesteric described in [1] is amassed body and is preferably had base material further, configures according to above-mentioned base material, the order of the above-mentioned reflection layer Xb of above-mentioned reflection layer Xa and at least 1 layer of at least 1 layer.

[3] [1] or the cholesteric described in [2] amass the preferred above-mentioned levorotatory chiral agent of body by following general formula (1) or following general formula (2) expression.

(in general formula (1), M represents hydrogen atom or substituting group independently of one another, R ¹represent any one in linking group shown below.

Wherein, * represents the position with the oxygen atoms bond in general formula (1) respectively.R ³independently of one another represent carbon number be 1 ~ 3 alkyl or carbon number be the aryl of 6 ~ 10.)

(in general formula (2), R ²represent any one in substituting group shown below, two R ²mutually can be the same or different.

Wherein, * represents the position with the oxygen atoms bond in general formula (2) respectively.Y ¹represent independently of one another singly-bound ,-O-,-C (=O) O-,-OC (=O)-, any one in-OC (=O) O-, Sp ¹represent that singly-bound or carbon number are the alkylidene of 1 ~ 8 independently of one another, Z ¹represent hydrogen atom or (methyl) acryloyl group independently of one another, n represents the integer of more than 1.)

[4] cholesteric according to any one of [1] ~ [3] is amassed the preferred above-mentioned levorotatory chiral agent of body and is represented by following general formula (3) or following general formula (4).

(in general formula (3), R ^arepresent any one in linking group shown below.

Wherein, * represents the position with the oxygen atoms bond in general formula (3) respectively.)

(in general formula (4), R ^brepresent substituting group shown below, two R ^bmutually can be the same or different.

Wherein, * represents the position with the oxygen atoms bond in general formula (4), Y ²represent singly-bound ,-O-,-OC (=O)-in any one, Sp ²represent that singly-bound or carbon number are the alkylidene of 1 ~ 8, Z ²represent hydrogen atom or (methyl) acryloyl group.)

[5] cholesteric according to any one of [1] ~ [4] is amassed body and is preferably had above-mentioned reflection layer Xa and each one deck of above-mentioned reflection layer Xb.

[6] cholesteric according to any one of [1] ~ [4] amass body preferably have more than 2 layers, at least one in above-mentioned reflection layer Xa and above-mentioned reflection layer Xb, the chiral agent comprised in all above-mentioned reflection layer Xa is all identical, and the chiral agent comprised in all above-mentioned reflection layer Xb is all identical.

[7] [1] ~ [4] and the cholesteric according to any one of [6] amass body preferably have more than 2 groups by 1 layer of above-mentioned reflection layer Xa and 1 layer group that above-mentioned reflection layer Xb forms, the above-mentioned reflection layer Xa comprised respectively in each group is mutually equal with the selection reflection wavelength of above-mentioned reflection layer Xb, the selection reflection wavelength of the above-mentioned reflection layer Xa comprised in different groups is mutually different, further, the selection reflection wavelength of the above-mentioned reflection layer Xb comprised in different groups is mutually different.

[8] it is less than 1% that the cholesteric according to any one of [1] ~ [7] amasss the mist degree that the preferred above-mentioned cholesteric of body amasss body.

[9] cholesteric according to any one of [1] ~ [8] amasss at least a kind that body preferably has in easy adhesive linkage, hard conating, UV-absorbing layer, bonding coat and sealer further.

[10] maximal value that the cholesteric according to any one of [1] ~ [9] amasss the transmissivity of body preferably in the scope of 420nm ~ 680nm is less than 10%.

[11] maximal value that the cholesteric according to any one of [1] ~ [10] amasss the transmissivity of body preferably in the scope of 450nm ~ 500nm and the scope of 600nm ~ 660nm is less than 10%, is more than 20% in the transmissivity of 550nm.

[12] a kind of cholesteric amasss the assembly of body, it is characterized in that, its cholesteric had according to any one of plural [1] ~ [11] amasss body, it is mutually different that above-mentioned cholesteric amasss body selection reflection wavelength each other, amasss body have at least one in bonding coat and adhesive linkage each other in above-mentioned cholesteric.

[13] maximal value that the cholesteric described in [12] amasss the transmissivity of assembly preferably in the scope of 420nm ~ 680nm of body is less than 10%.

[14] maximal value that the cholesteric described in [12] amasss the transmissivity of assembly preferably in the scope of 450nm ~ 500nm and the scope of 600nm ~ 660nm of body is less than 10%, is more than 20% in the transmissivity of 550nm.

[15] cholesteric amasss a manufacture method for body, it is characterized in that, this manufacture method has following operation:

Utilizing containing Rod-like liquid crystal compound, HTP is 30 μm ^-1the polymerizable liquid crystal compound of the reflection layer Xa of above dextrorotatory chiral agent, coated film is formed by coating, heat is applied to the polymerizable liquid crystal compound of above-mentioned reflection layer Xa and forms the state of cholesteric crystal phase, active radioactive ray are irradiated to be fixed by cholesteric crystal to the polymerizable liquid crystal compound of above-mentioned reflection layer Xa, thus forms the reflection layer Xa of at least 1 layer; With

Utilizing containing Rod-like liquid crystal compound, HTP is 30 μm ^-1the polymerizable liquid crystal compound of the reflection layer Xb of above levorotatory chiral agent, coated film is formed by coating, heat is applied to the polymerizable liquid crystal compound of above-mentioned reflection layer Xb and forms the state of cholesteric crystal phase, active radioactive ray are irradiated to be fixed by cholesteric crystal to the polymerizable liquid crystal compound of above-mentioned reflection layer Xb, thus form the reflection layer Xb of at least 1 layer

The selection reflection wavelength of all above-mentioned reflection layer Xa and all above-mentioned reflection layer Xb is the scope of 400nm ~ 750nm, the selection reflection wavelength of above-mentioned reflection layer Xa of at least 1 layer is mutually equal with the selection reflection wavelength of the above-mentioned reflection layer Xb of at least 1 layer, according to all adjacent modes that the reflection layer of above-mentioned fixing of cholesteric crystal is contacted each other, the polymerizable liquid crystal compound of the reflection layer on upper strata is directly applied on the reflection layer of lower floor.

The effect of invention

According to the present invention, the cholesteric of a kind of left and right anti-twist can be provided not use jointing material and the lamination that contacts with each other, in apparent good order and condition, the transparency is high, to have in visible region select reflection characteristic, cholesteric that reflecting properties is high amasss body.

Accompanying drawing explanation

Fig. 1 illustrates that cholesteric of the present invention amasss the schematic diagram of an example of body.

Fig. 2 illustrates that cholesteric of the present invention amasss the schematic diagram of another example of body.

Fig. 3 illustrates that cholesteric of the present invention amasss the schematic diagram of another example of body.

Fig. 4 illustrates that cholesteric amasss the figure of transmitted spectrum of body (G1-1), (G4), (G5), (G6), (G7), (G8), (G9), (G10).

Fig. 5 illustrates that cholesteric amasss the figure of the transmitted spectrum of the assembly (G12) of body.

Fig. 6 illustrates that cholesteric amasss the figure of the transmitted spectrum of the assembly (G13) of body.

Embodiment

Below, amass to cholesteric the optimal way that body and manufacture method and cholesteric thereof amass the assembly of body to be described.

The explanation of the technical characteristic below recorded is carried out according to representative embodiments of the present invention sometimes, but the present invention is not limited to this embodiment.It should be noted that, in this instructions, refer to by the numerical range that " ~ " represents, the numerical value described in front and back comprising " ~ " is as the scope of lower limit and higher limit.

[cholesteric amasss body]

The feature that cholesteric of the present invention amasss body is, it has the reflection layer Xb of at least 1 layer reflection layer Xa and at least 1 layer, and above-mentioned reflection layer Xa is by the reflection layer of fixing of cholesteric crystal, and is 30 μm containing HTP ^-1above dextrorotatory chiral agent, above-mentioned reflection layer Xb is by the reflection layer of fixing of cholesteric crystal, and is 30 μm containing HTP ^-1above levorotatory chiral agent, the selection reflection wavelength of all above-mentioned reflection layer Xa and all above-mentioned reflection layer Xb is the scope of 400nm ~ 750nm, the selection reflection wavelength of above-mentioned reflection layer Xa of at least 1 layer is mutually equal with the selection reflection wavelength of the above-mentioned reflection layer Xb of at least 1 layer, allly adjacent the reflection layer of above-mentioned fixing of cholesteric crystal has been carried out lamination in the mode contacted with each other each other.

By such formation, concerning cholesteric of the present invention amasss body, the cholesteric of left and right anti-twist does not use jointing material and with the mode lamination contacted with each other, cholesteric of the present invention amasss the in apparent good order and condition of body, the transparency is high, have selection reflection characteristic in visible region, reflecting properties is high.

Below, the preferred mode that cholesteric of the present invention amasss body is specifically described.

< cholesteric amasss the characteristic > of body

Cholesteric of the present invention is amassed the mist degree that the preferred above-mentioned cholesteric of body amasss body and is less than 1%, is more preferably less than 0.5%, is particularly preferably less than 0.4%.

< cholesteric amasss the formation > of body

The example by accompanying drawing, cholesteric of the present invention being amassed to the formation of body is described.But, the present invention not limit by accompanying drawing.

In following each figure, describe the formation with base material, but cholesteric of the present invention is amassed body and is not limited to the formation with base material.

Fig. 1 illustrates that cholesteric of the present invention amasss the schematic diagram of an example of body, be laminated with by the reflection layer Xa (14a) of cholesteric immobilization with by the reflection layer Xb (14b) of cholesteric immobilization on the base substrate 12, all adjacent reflection layer of above-mentioned fixing of cholesteric crystal are configured in the mode contacted with each other each other.Such as, as shown in Figure 1, when above-mentioned reflection layer Xa and above-mentioned reflection layer Xb is respectively each 1 layer, above-mentioned reflection layer Xa (14a) and above-mentioned reflection layer Xb (14b) are configured with contacting with each other.Above-mentioned reflection layer Xa (14a) and above-mentioned base material 12 can be adjacent, also can carry out lamination across other layers.As other layers above-mentioned, other reflection layers described later, oriented layer, undercoat etc. can be enumerated.

The laminated order of base material 12, above-mentioned reflection layer Xa (14a) and above-mentioned reflection layer Xb (14b) is not particularly limited.Wherein, when being positioned at lower floor from the reflection layer containing dextrorotatory chiral agent, according to the difference of chiral agent kind used, surface state can become good aspect and set out, and preferably as recorded in Fig. 1, cholesteric of the present invention is amassed in body and is configured with above-mentioned base material successively, above-mentioned reflection layer Xa (is 30 μm containing HTP ^-1above dextrorotatory chiral agent) and above-mentioned reflection layer Xb (be 30 μm containing HTP ^-1above levorotatory chiral agent).

(reflection layer by fixing of cholesteric crystal)

Concerning cholesteric of the present invention amasss body, there is the above-mentioned reflection layer Xb of at least 1 layer above-mentioned reflection layer Xa and at least 1 layer as the reflection layer by fixing of cholesteric crystal.

Cholesteric of the present invention is amassed in body, allly adjacent the reflection layer of above-mentioned fixing of cholesteric crystal is carried out lamination in the mode contacted with each other each other.

Above-mentioned reflection layer Xa is by the reflection layer of fixing of cholesteric crystal, and it is 30 μm that above-mentioned reflection layer Xa contains HTP ^-1above dextrorotatory chiral agent, the selection reflection wavelength of all above-mentioned reflection layer Xa is the scope of 400nm ~ 750nm.

Above-mentioned reflection layer Xb is by the reflection layer of fixing of cholesteric crystal, and it is 30 μm that above-mentioned reflection layer Xb contains HTP ^-1above levorotatory chiral agent, the selection reflection wavelength of all above-mentioned reflection layer Xb is the scope of 400nm ~ 750nm.

Cholesteric of the present invention is amassed in body, and the selection reflection wavelength of above-mentioned reflection layer Xa of at least 1 layer is mutually equal with the selection reflection wavelength of the above-mentioned reflection layer Xb of at least 1 layer.The above-mentioned reflection layer Xb of above-mentioned reflection layer Xa and at least 1 layer of at least 1 layer have same degree pitch, demonstrate in the mode of mutually reverse optical activity simultaneously, left light and the right-hand circularly polarized light of the wavelength of same degree all can reflect, thus preferably.

The selection reflection wavelength of above-mentioned reflection layer refers to, illustrating by the half transmitting rate T shown in following formula when the minimal value of the transmissivity in this reflection layer being set to Tmin (%) _1/2(%) mean value of two wavelength.

Obtain the formula of half transmitting rate: T _1/2=100-(100-Tmin) ÷ 2

More specifically, for every one deck reflection layer, there is at long wave side (λ 1) and shortwave side (λ 2) wavelength that two illustrate above-mentioned half transmitting rate, select the value of reflection wavelength to represent with the mean value of λ 1 and λ 2.

In addition, the selection reflection wavelength " mutually equal " of above-mentioned reflection layer does not also mean that strictly equal, and allows the error optically not having influential scope.In this instructions, the selection reflection wavelength " mutually equal " of two reflection layers refers to that the difference of the selection reflection wavelength of two reflection layers is below 20nm, and this difference is preferably below 15nm, is more preferably below 10nm.

By mutually equal and rotating two reflection layers having left and right different carry out lamination to selection reflection wavelength, the transmitted spectrum of laminate demonstrates a strong peak at this selection reflection wavelength, is preferred from the aspect of reflecting properties.

At least 1 layer of maximum value at the reflectivity of 400nm ~ 750nm that cholesteric of the present invention is amassed in body preferred above-mentioned reflection layer Xa and above-mentioned reflection layer Xb is more than 40%, is more preferably more than 45%.All above-mentioned reflection layer Xa and all above-mentioned reflection layer Xb are preferably more than 40% in the maximum value of the reflectivity of 400nm ~ 750nm, are more preferably more than 45%.

Concerning cholesteric of the present invention amasss body, as the reflection layer by fixing of cholesteric crystal, other the reflection layer (hereinafter also referred to as other reflection layers) fixed by cholesteric crystal except above-mentioned reflection layer Xa and above-mentioned reflection layer Xb can be had.

Cholesteric of the present invention is amassed body and is preferably had the above-mentioned reflection layer Xa of each 1 layer and above-mentioned reflection layer Xb, preferably there is the above-mentioned reflection layer Xa of each 1 layer and above-mentioned reflection layer Xb, and not there is other the reflection layer fixed by cholesteric crystal except above-mentioned reflection layer Xa and above-mentioned reflection layer Xb.

It should be noted that, in this instructions, in general in above-mentioned reflection layer Xa, above-mentioned reflection layer Xb and other reflection layer, be carry out recording as the explanation of " each reflection layer ".

Other the lamination number of the reflection layer fixed by cholesteric crystal above-mentioned is not particularly limited, can be such as 0 layer ~ 10 layers, preferably 0 layer ~ 8 layers, more preferably 0 layer ~ 6 layers.It should be noted that, from the aspect of filming, preferably make other reflection layers be 0 layer.

Lamination as other reflection layers above-mentioned is formed, and is not particularly limited.

Cholesteric of the present invention amasss body when having two-layer above, in above-mentioned reflection layer Xa and above-mentioned reflection layer Xb at least one, from the aspect of the cost-effectiveness that parts universalization produces, preferred all above-mentioned reflection layer Xa are identical with the chiral agent of all above-mentioned reflection layer Xb.

Fig. 2 illustrates and represents that the cholesteric of the present invention when having two-layer above, in above-mentioned reflection layer Xa and above-mentioned reflection layer Xb at least one amasss the schematic diagram of another example of body.In Fig. 2, be laminated with the reflection layer Xa (14a) of cholesteric immobilization on the base substrate 12, by the reflection layer Xa (16a) of cholesteric immobilization, by the reflection layer Xb (14b) of cholesteric immobilization with by the reflection layer Xb (16b) of cholesteric immobilization, above-mentioned reflection layer Xa (14a) and above-mentioned reflection layer Xa (16a) configure with contacting with each other, above-mentioned reflection layer Xa (16a) and above-mentioned reflection layer Xb (14b) configure with contacting with each other, above-mentioned reflection layer Xb (14b) and above-mentioned reflection layer Xb (16b) configure with contacting with each other.

For above-mentioned reflection layer Xa, as long as the selection reflection wavelength of all above-mentioned reflection layer Xa is in the scope of 400nm ~ 750nm, then its total number of plies is just not particularly limited, such as, is preferably 1 layer ~ 10 layers, is more preferably 1 layer ~ 5 layers, is particularly preferably 1 layer.In Fig. 2, above-mentioned reflection layer Xa is 2 layers.

For above-mentioned reflection layer Xb, as long as the selection reflection wavelength of all above-mentioned reflection layer Xb is in the scope of 400nm ~ 750nm, then its total number of plies is just not particularly limited, such as, is preferably 1 layer ~ 10 layers, is more preferably 1 layer ~ 5 layers, is particularly preferably 1 layer.In Fig. 2, above-mentioned reflection layer Xb is 2 layers.

Total number of plies of above-mentioned reflection layer Xa and total number of plies of above-mentioned reflection layer Xb separate, can be the same or different, preferably identical.Cholesteric of the present invention amass body can have respectively more than 2 groups by 1 layer of above-mentioned reflection layer Xa and 1 layer group that above-mentioned reflection layer Xb forms.Now, the above-mentioned reflection layer Xa comprised respectively in each group is more preferably mutually equal with the selection reflection wavelength of above-mentioned reflection layer Xb.

Cholesteric of the present invention amass the above-mentioned reflection layer Xa comprised in body exist two-layer above when, the selection reflection wavelength of preferred each reflection layer Xa is mutually different, this considers based on following aspect: though the above-mentioned reflection layer Xa of identical selection reflection wavelength exist two-layer more than, reflection efficiency also can not improve; And the economic factor such as manufacturing cost.Herein, the mutual difference of selection reflection wavelength of two reflection layers refers to, selects the difference of reflection wavelength at least more than 20nm for two.Under there is plural situation in above-mentioned reflection layer Xa, the difference of each reflection layer Xa selection reflection wavelength each other preferably greater than 20nm, be more preferably more than 30nm, be particularly preferably more than 40nm.

Cholesteric of the present invention amass the above-mentioned reflection layer Xb comprised in body exist two-layer above when, the selection reflection wavelength of same preferred each reflection layer Xb is mutually different.Above-mentioned reflection layer Xb exist two-layer above when, the difference of each reflection layer Xb selection reflection wavelength each other preferably greater than 20nm, be more preferably more than 30nm, be particularly preferably more than 40nm.

Cholesteric of the present invention amass body have respectively more than 2 groups by 1 layer of above-mentioned reflection layer Xa and the 1 layer of group that above-mentioned reflection layer Xb forms when, the selection reflection wavelength of the above-mentioned reflection layer Xa comprised in more preferably different groups is mutually different, and the selection reflection wavelength of the above-mentioned reflection layer Xb comprised in more preferably different groups is mutually different.

Particularly preferably be, cholesteric of the present invention amass body have respectively more than 2 groups by 1 layer of above-mentioned reflection layer Xa and 1 layer group that above-mentioned reflection layer Xb forms, and the selection reflection wavelength of the above-mentioned reflection layer Xa comprised respectively in each group and above-mentioned reflection layer Xb is mutually equal, and the selection reflection wavelength of the above-mentioned reflection layer Xa comprised in different groups is mutually different, and the selection reflection wavelength of the above-mentioned reflection layer Xb comprised in different groups is mutually different.

Cholesteric of the present invention is amassed in body, and the maximum value of other the reflectivity of the reflection layer fixed by cholesteric crystal preferably in 400nm ~ 750nm beyond above-mentioned reflection layer Xa and above-mentioned reflection layer Xb is more than 40%, is more preferably more than 45%.

From the viewpoint of the high light of the visibility reflecting people efficiently, the maximal value that cholesteric of the present invention amasss the transmissivity of body preferably in the scope of 420nm ~ 680nm is less than 10%.

On the other hand, from the viewpoint of for special filter, the maximal value that cholesteric of the present invention amasss the transmissivity of body preferably in the scope of 450nm ~ 500nm and the scope of 600nm ~ 660nm is less than 10%, be more than 20% in the transmissivity of 550nm.

When forming this characteristic, preferably making cholesteric of the present invention amass body is following formation: have respectively 2 groups ~ 10 groups by 1 layer of above-mentioned reflection layer Xa and 1 layer group that above-mentioned reflection layer Xb forms, and the selection reflection wavelength of the above-mentioned reflection layer Xa comprised respectively in each group and above-mentioned reflection layer Xb is mutually equal, and the selection reflection wavelength of the above-mentioned reflection layer Xa comprised in different groups is mutually different, and the selection reflection wavelength of the above-mentioned reflection layer Xb comprised in different groups is mutually different; Be more preferably following formation: have respectively 6 groups ~ 10 groups by 1 layer of above-mentioned reflection layer Xa and 1 layer group that above-mentioned reflection layer Xb forms.

Cholesteric of the present invention is amassed body and also can be used with other support component integrations such as laminated glass.Now, base material also can with other support component integrations together with each reflection layer, also base material can be peeled off and by reflection layer and support component integration.

In addition, the thickness of each reflection layer is 1 μm ~ about 8 μm (being preferably 2 μm ~ about 7 μm).But, be not limited to this scope.By adjusting the kind and concentration etc. thereof of the material (mainly liquid crystal material and chiral agent) for the formation of each reflection layer, each reflection layer of desired pitch can be formed.In addition, the thickness of each reflection layer can be made to be desired scope by adjustment coating weight.By reducing the thickness of reflection layer, reflectivity can be reduced wittingly, can make a part for light through.

Cholesteric of the present invention is amassed in body, and preferred above-mentioned each reflection layer is by being coated with the cholesteric crystal that is made up of polymerizable liquid crystal and utilizing being fixed of photopolymerization to form after making its orientation.

-reflection layer formation material-

Cholesteric of the present invention is amassed in body, preferably in the formation of each reflection layer, uses polymerizable liquid crystal compound.As an example of above-mentioned polymerizable liquid crystal compound, it is at least preferably 30 μm containing Rod-like liquid crystal compound, HTP ^-1above chiral agent and the mode of polymerization initiator.Also each composition of more than two kinds can be comprised.Such as, the Rod-like liquid crystal compound of polymerism and the Rod-like liquid crystal compound of non-polymerization can be share.In addition, low molecular weight liquid crystal compound and high molecule liquid crystal compound can also be share.In addition, in order to improve homogeneity and coating adaptability, the film strength of orientation, also can containing at least one be selected from the various adjuvants such as horizontal alignment agent, anti-uneven agent, anticrater agent and polymerizable monomer.In addition, in above-mentioned liquid-crystal composition, polymerization inhibitor, antioxidant, ultraviolet light absorber, light stabilizer, colorant, metal oxide microparticle etc. can be added further in the scope not reducing optical property as required.

1. Rod-like liquid crystal compound

As Rod-like liquid crystal compound, preferably use azomethine class, azoxy class, cyanobiphenyl class, cyano-phenyl ester class, benzoates, cyclohexanecarboxylic acid's ester class, cyanophenylcyclohexanes class, cyano group substituted-phenyl miazines, alkoxy substituted phenyl miazines, phenyl dioxane class, diphenyl acetylene class and alkenylcyclohexyl base cyanobenzene class.Be not only above low molecular weight liquid crystal molecule, high molecule liquid crystal molecule can also be used.

For Rod-like liquid crystal compound, more particularly by being polymerized, orientation is fixed, as polymerism Rod-like liquid crystal compound, Makromol.Chem. can be used, 190 volumes, 2255 pages (1989), Advanced Materials 5 volume, 107 pages (1993), No. 4683327, United States Patent (USP), No. 5622648, United States Patent (USP), No. 5770107, United States Patent (USP), No. WO95/22586, No. WO95/24455, No. WO97/00600, No. WO98/23580, No. WO98/52905, No. 1-272551, Japanese Unexamined Patent Publication, No. 6-16616, Japanese Unexamined Patent Publication, No. 7-110469, Japanese Unexamined Patent Publication, the compound recorded in No. 11-80081, Japanese Unexamined Patent Publication and Japanese Patent Application 2001-64627 grade.In addition, as polymerism Rod-like liquid crystal compound, be preferably the polymerism Rod-like liquid crystal compound represented by following general formula (X).

General formula (X) Q ¹-L ¹-Cy ¹-L ²-(Cy ²-L ³) n-Cy ³-L ⁴-Q ²

(in general formula (X), Q ¹and Q ²be polymerizable group independently of one another, L ¹and L ⁴be the linking group of divalence independently of one another, L ²and L ³be the linking group of singly-bound or divalence independently of one another, Cy ¹, Cy ²and Cy ³for the cyclic group of divalence, n is 0,1,2 or 3.)

Below, the polymerism Rod-like liquid crystal compound represented by further mutual-through type (X) is described.

In general formula (X), Q ¹and Q ²be polymerizable group independently of one another.The polyreaction of polymerizable group is preferably addition polymerization (comprising ring-opening polymerization) or condensation polymerization.In other words, polymerizable group preferably can carry out the functional group of polyaddition reaction or condensation polymerization reaction.The example of polymerizable group is shown below.

In general formula (X), L ¹and L ⁴be the linking group of divalence independently of one another.L ¹and L ⁴preferably be selected from the linking group of the divalence in the group be made up of the chain-like groups of-O-,-S-,-CO-,-NR-,-C=N-, divalence, the cyclic group of divalence and their combination independently of one another.Above-mentioned R to be carbon number be 1 ~ 7 alkyl or hydrogen atom.R is preferably alkyl or the hydrogen atom that carbon number is 1 ~ 4, and more preferably methyl, ethyl or hydrogen atom, most preferably be hydrogen atom.

Illustrate below by the example of the linking group of the divalence be combined to form.Herein, left side and Q (Q ¹or Q ²) bonding, right side and Cy (Cy ¹or Cy ³) bonding.

Chain-like groups-the O-of L-1:-CO-O-divalence

Chain-like groups-the O-CO-of L-2:-CO-O-divalence

Chain-like groups-the O-CO-O-of L-3:-CO-O-divalence

The cyclic group of the chain-like groups-O-divalence of L-4:-CO-O-divalence-

Cyclic group-the CO-O-of the chain-like groups-O-divalence of L-5:-CO-O-divalence

Cyclic group-the O-CO-of the chain-like groups-O-divalence of L-6:-CO-O-divalence

The chain-like groups of the cyclic group-divalence of the chain-like groups-O-divalence of L-7:-CO-O-divalence-

Chain-like groups-the CO-O-of the cyclic group-divalence of the chain-like groups-O-divalence of L-8:-CO-O-divalence

Chain-like groups-the O-CO-of the cyclic group-divalence of the chain-like groups-O-divalence of L-9:-CO-O-divalence

The cyclic group of the chain-like groups-O-CO-divalence of L-10:-CO-O-divalence-

Cyclic group-the CO-O-of the chain-like groups-O-CO-divalence of L-11:-CO-O-divalence

Cyclic group-the O-CO-of the chain-like groups-O-CO-divalence of L-12:-CO-O-divalence

The chain-like groups of the cyclic group-divalence of the chain-like groups-O-CO-divalence of L-13:-CO-O-divalence-

Chain-like groups-the CO-O-of the cyclic group-divalence of the chain-like groups-O-CO-divalence of L-14:-CO-O-divalence

Chain-like groups-the O-CO-of the cyclic group-divalence of the chain-like groups-O-CO-divalence of L-15:-CO-O-divalence

The cyclic group of the chain-like groups-O-CO-O-divalence of L-16:-CO-O-divalence-

Cyclic group-the CO-O-of the chain-like groups-O-CO-O-divalence of L-17:-CO-O-divalence

Cyclic group-the O-CO-of the chain-like groups-O-CO-O-divalence of L-18:-CO-O-divalence

The chain-like groups of the cyclic group-divalence of the chain-like groups-O-CO-O-divalence of L-19:-CO-O-divalence-

Chain-like groups-the CO-O-of the cyclic group-divalence of the chain-like groups-O-CO-O-divalence of L-20:-CO-O-divalence

Chain-like groups-the O-CO-of the cyclic group-divalence of the chain-like groups-O-CO-O-divalence of L-21:-CO-O-divalence

The chain-like groups of divalence refers to alkylidene, substituted alkylene, alkylene group, replacement alkylene group, alkynylene, replacement alkynylene.Preferred alkylidene, substituted alkylene, alkylene group, replacement alkylene group, more preferably alkylidene and alkylene group.

Alkylidene can have side chain.The carbon number of alkylidene is preferably 1 ~ 12, more preferably 2 ~ 10, most preferably be 2 ~ 8.

The alkylene moiety of substituted alkylene is identical with above-mentioned alkylidene.Alternatively the example of base, comprises halogen atom.

Alkylene group can have side chain.The carbon number of alkylene group is preferably 2 ~ 12, more preferably 2 ~ 10, most preferably be 2 ~ 8.

Alkynylene can have side chain.The carbon number of alkynylene is preferably 2 ~ 12, more preferably 2 ~ 10, most preferably be 2 ~ 8.

The alkynylene part replacing alkynylene is identical with above-mentioned alkynylene.Alternatively the example of base, comprises halogen atom.

As the concrete example of the chain-like groups of divalence, ethylidene, trimethylene, propylidene, tetramethylene, 2-methyl-tetramethylene, pentamethylene, hexa-methylene, eight methylene, 2-butenylidene, 2-butynelene etc. can be enumerated.

The definition of the cyclic group of divalence and example and Cy described later ¹, Cy ²and Cy ³definition identical with example.

In general formula (X), L ²or L ³be the linking group of singly-bound or divalence independently of one another.L ²and L ³preferably be selected from linking group or the singly-bound of the divalence in the group be made up of the chain-like groups of-O-,-S-,-CO-,-NR-,-C=N-, divalence, the cyclic group of divalence and their combination independently of one another.Above-mentioned R to be carbon number be 1 ~ 7 alkyl or hydrogen atom, preferably carbon number is alkyl or the hydrogen atom of 1 ~ 4, and more preferably methyl, ethyl or hydrogen atom, most preferably be hydrogen atom.About the chain-like groups of divalence and the cyclic group of divalence, with L ¹and L ⁴definition and implication identical.

As L ²or L ³and the linking group of preferred divalence, can-COO-,-OCO-,-OCOO-,-OCONR-,-COS-,-SCO-,-CONR-,-NRCO-,-CH be enumerated ₂cH ₂-,-C=C-COO-,-C=N-,-C=N-N=C-etc.

In general formula (X), n is 0,1,2 or 3.When n is 2 or 3, two L ³can be the same or different, two Cy ²also can be the same or different.N is preferably 1 or 2, is more preferably 1.

In general formula (X), Cy ¹, Cy ²and Cy ³be the cyclic group of divalence independently of one another.

The ring comprised in cyclic group is preferably 5 rings, 6 rings or 7 rings, and more preferably 5 rings or 6 rings, most preferably be 6 rings.

The ring comprised in cyclic group also can be condensed ring.But, compared with condensed ring, be more preferably monocycle.

The ring comprised in cyclic group also can be any one in aromatic rings, aliphatics ring and heterocycle.Phenyl ring and naphthalene nucleus is comprised in the example of aromatic rings.Cyclohexane ring is comprised in the example of aliphatics ring.The example of heterocycle comprises pyridine ring and pyrimidine ring.

As the cyclic group with phenyl ring, preferred Isosorbide-5-Nitrae-phenylene.As the cyclic group with naphthalene nucleus, preferred naphthalene-1,5-bis-base and naphthalene-2,6-bis-base.As the cyclic group with cyclohexane ring, be preferably Isosorbide-5-Nitrae-cyclohexylene.As the cyclic group with pyridine ring, preferred pyridine-2,5-bis-base.As the cyclic group with pyrimidine ring, preferred pyrimidine-2,5-bis-base.

Cyclic group can have substituting group.The alkoxy carbonyl group that the acyloxy that the alkylthio group that the alkoxy that the halogen-substituted alkyl that the alkyl that substituent example comprises halogen atom, cyano group, nitro, carbon number are 1 ~ 5, carbon number are 1 ~ 5, carbon number are 1 ~ 5, carbon number are 1 ~ 5, carbon number are 2 ~ 6, carbon number are 2 ~ 6, carbamyl, carbon number be 2 ~ 6 alkyl-substituted amino formoxyl and carbon number be the acylamino-of 2 ~ 6.

The example of the polymerism Rod-like liquid crystal compound represented by general formula (X) is shown below.The present invention is not limited to these.

In addition, as above-mentioned Rod-like liquid crystal compound, preferably on the basis of the polymerism Rod-like liquid crystal compound represented by above-mentioned general formula (X), share the compound represented by following general formula (V) of at least one.

General formula (V)

M ¹-(L ¹)p-Cy ¹-L ²-(Cy ²-L ³)n-Cy ³-(L ⁴)q-M ²

(in general formula (V), M ¹and M ²represent hydrogen atom, replacement or without the alkyl replaced, replacement or without the aryl replaced, heterocyclic radical, cyano group, halogen ,-SCN ,-CF3, nitro or Q independently of one another ¹, M ¹and M ²in at least one represent Q ¹group in addition.

Wherein, Q ¹, L ¹, L ², L ³, L ⁴, Cy ¹, Cy ², Cy ³identical with the group implication represented by above-mentioned general formula (X) with n.In addition, p and q is 0 or 1.)

M ¹and M ²do not represent Q ¹when, M ¹and M ²be preferably hydrogen atom, replacement or without replace alkyl, replacement or without replace aryl, cyano group, be more preferably alkyl or phenyl that carbon number is 1 ~ 4, p and q is preferably 0.

In addition, as the preferred blending ratio of the compound represented by the general formula (V) in the potpourri of the polymerizable liquid crystal compound represented by above-mentioned general formula (X) and the compound represented by general formula (V), be 0.1% ~ 40%, be more preferably 1% ~ 30%, more preferably 5% ~ 20%.

Below, the preferred exemplary of the compound represented by general formula (V) is shown, but the present invention is not limited to these.

2. chiral agent:

Cholesteric of the present invention is amassed in body, and it is 30 μm that above-mentioned reflection layer Xa contains HTP ^-1above dextrorotatory chiral agent, it is 30 μm that above-mentioned reflection layer Xb contains HTP ^-1above levorotatory chiral agent.Above-mentioned chiral agent can from known various chiral agent (such as, be recorded in liquid crystal device handbook (liquid crystal デバイス Ha Application De Block ッ Network), the 3rd chapter 4-3 item, TN, STN hand levy agent, 199 pages, JSPS the 1 council compile, 1989) in select.Chiral agent generally comprises unsymmetrical carbon, but the axle asymmetric compound or face asymmetric compound that do not comprise unsymmetrical carbon also can be used as chiral agent.The example of axle asymmetric compound or face asymmetric compound comprises dinaphthalene, helicene, paracyclophane and their derivant.Chiral agent can have polymerizable group.In chiral agent, there is polymerizable group, the Rod-like liquid crystal compound that simultaneously share is when also having polymerizable group, by the polyreaction of the chiral agent and polymerism rod shaped liquid crystal compound with polymerizable group, the polymkeric substance of the repetitive having and derived by Rod-like liquid crystal compound and the repetitive derived by chiral agent can be formed.In which, the polymerizable group that the chiral agent with polymerizable group has is preferably the group of the polymerizable group identical type had with polymerism Rod-like liquid crystal compound.Therefore, the polymerizable group of chiral agent is also preferably unsaturated polymerizable group, epoxy radicals or '-aziridino, more preferably unsaturated polymerizable group, is particularly preferably the unsaturated polymerizable group of ethylenic.

In addition, above-mentioned chiral agent also can be liquid-crystal compounds.

Above-mentioned chiral agent is preferably 1 % by mole ~ 30 % by mole relative to share Rod-like liquid crystal compound.When the consumption of above-mentioned chiral agent is less, scarcely can have an impact to liquid crystal liquid crystal property, thus preferably.Therefore, for being used as the optically active compound of chiral agent, in order to the twist alignment so that desired pitch can be reached on a small quantity, preferably there is the compound of strong torsion.

As such chiral agent demonstrating strong torsion, such as can enumerate the chiral agent recorded in Japanese Unexamined Patent Publication 2010-181852 publication, Japanese Unexamined Patent Publication 2003-287623 publication, Japanese Unexamined Patent Publication 2002-80851 publication, Japanese Unexamined Patent Publication 2002-80478 publication, Japanese Unexamined Patent Publication 2002-302487 publication, can the present invention be preferred for.In addition, about the isobide compounds recorded in these Publications, also can use the isomannite compounds of counter structure, about the isomannite compounds recorded in these publications, also can use the isobide compounds of counter structure.

Herein, as dextrorotatory chiral agent, compared with levorotatory chiral agent, market provides more the dextrorotatory chiral agent that torsion is strong.Such as, it is 30 μm as HTP ^-1above dextrorotatory chiral agent, preferably can use LC756 (manufacture of BASF society) in the present invention.

The HTP of dextrorotatory chiral agent is preferably 40 μm ^-1above, 50 μm are more preferably ^-1above.

On the other hand, it is 30 μm as HTP ^-1above levorotatory chiral agent, is not particularly limited, can uses known chiral agent, also can use the chiral agent represented by general formula described later (1) ~ (4).

The HTP of levorotatory chiral agent is preferably 33 μm ^-1above, 35 μm are more preferably ^-1above.

In the present invention, above-mentioned levorotatory chiral agent is preferably represented by following general formula (1) or following general formula (2), is more preferably represented by following general formula (3) or general formula (4).

(in general formula (3), R ^arepresent any one in linking group shown below.

Chiral agent represented by above-mentioned general formula (1) is described.

In above-mentioned general formula (1), M represents hydrogen atom or substituting group independently of one another, preferably represent hydrogen atom, halogen atom or carbon number be 1 ~ 12 alkyl, alkynyl, alkenyl or alkoxy, the CH in each group ₂base can be replaced by O, S, OCO, COO, OCOO, CO or phenylene independently of one another.

Herein, at carbon number be 1 ~ 12 alkyl, alkynyl, CH in alkenyl or alkoxy ₂when base is replaced by O, S, OCO, COO, OCOO, CO or phenylene, the CH be substituted ₂the position of base can be the end of each group, also can be the inside of each group.If the alkyl that such as carbon number is 1 is replaced by phenylene, then M represents phenyl in fact, if the alkyl that such as carbon number is 3 is replaced by CO, then M represents ethylcarbonyl group in fact, if the alkyl that such as carbon number is 4 is replaced by S, then M represents in fact rosickyite base, and these substituting groups are all contained in the M meeting general formula (1).

As CH ₂the unsubstituted carbon number of base is the alkyl of 1 ~ 12, the alkyl of straight chain, side chain or ring-type can be enumerated, such as, can enumerate methyl, ethyl, propyl group, butyl, amyl group, hexyl, heptyl, octyl group, nonyl, decyl, undecyl, dodecyl, cyclohexyl.

As CH ₂base is the alkyl of 1 ~ 12 by the carbon number that O replaces, and can enumerate 2-oxa-propyl group (=methoxy); 2-oxa-butyl (=ethoxyl methyl) or 3-oxa-butyl (=2-methoxy ethyl); 2-oxapentyl, 3-oxapentyl or 4-oxapentyl; 2-oxa-hexyl, 3-oxa-hexyl, 4-oxa-hexyl or 5-oxa-hexyl; 2-oxa-heptyl, 3-oxa-heptyl, 4-oxa-heptyl, 5-oxa-heptyl or 6-oxa-heptyl; 2-oxa-octyl group, 3-oxa-octyl group, 4-oxa-octyl group, 5-oxa-octyl group, 6-oxa-octyl group or 7-oxa-octyl group; 2-oxanonyl, 3-oxanonyl, 4-oxanonyl, 5-oxanonyl, 6-oxanonyl, 7-oxanonyl or 8-oxanonyl; Or 2-oxa-decyl, 3-oxa-decyl, 4-oxa-decyl, 5-oxa-decyl, 6-oxa-decyl, 7-oxa-decyl, 8-oxa-decyl or 9-oxa-decyl.

As CH ₂base is the alkyl of 1 ~ 12 by the carbon number that S replaces, can enumerate methyl mercapto, ethylmercapto group, rosickyite base, butylthio, penta sulfenyl, own sulfenyl, heptan sulfenyl, pungent sulfenyl, the ninth of the ten Heavenly Stems sulfenyl, the last of the ten Heavenly stems sulfenyl, undecane sulfenyl.

As CH ₂base is the alkyl of 1 ~ 12 by the carbon number that OCO or COO replaces, and is preferably straight-chain, has the group of 2 ~ 6 C atoms.Specifically, acetyl group oxygen base can be enumerated, propiono oxygen base, bytyry oxygen base, valeryl oxygen base, caproyl oxygen base, acetyl group oxygen ylmethyl, propiono oxygen ylmethyl, bytyry oxygen ylmethyl, valeryl oxygen ylmethyl, 2-acetyl group oxygen base ethyl, 2-propiono oxygen base ethyl, 2-bytyry oxygen base ethyl, 3-acetyl group oxygen base propyl group, 3-propiono oxygen base propyl group, 4-acetyl group oxygen Ji Dingji, methoxycarbonyl, ethoxy carbonyl, propoxycarbonyl, butoxy carbonyl, pentyloxy carbonyl, Methoxycarbonylmethyl, ethoxy carbonyl methyl, propoxycarbonyl methyl, butoxy carbonyl methyl, 2-(methoxycarbonyl) ethyl, 2-(ethoxy carbonyl) ethyl, 2-(propoxycarbonyl) ethyl, 3-(methoxycarbonyl) propyl group, 3-(ethoxy carbonyl) propyl group, 4-(methoxycarbonyl) butyl.

As CH ₂base is the alkyl of 1 ~ 12 by the carbon number that OCOO replaces, and can be straight-chain, also can be branched, but is preferably straight-chain, can use known group.

As CH ₂base is the alkyl of 1 ~ 12 by the carbon number that CO replaces, and can enumerate carbonvlmethyl, carbonylethyl, carbonyl propyl group, carbonyl butyl, carbonyl amyl group, carbonyl hexyl, carbonyl heptyl, carbonyl octyl group, carbonyl nonyl, carbonyl decyl, carbonyl undecyl.

As CH ₂base is the alkyl of 1 ~ 12 by the carbon number that phenylene replaces, and can enumerate phenyl.

In addition, carbon number is alkyl, alkynyl, the CH in alkenyl or alkoxy of 1 ~ 12 ₂base can be replaced by O, S, OCO, COO, OCOO, CO of the of the same race or xenogenesis of more than 2 or phenylene.

As CH ₂the carbon number that base is replaced by O, S, OCO, COO, OCOO, CO of the of the same race or xenogenesis of more than 2 or phenylene is the alkyl of 1 ~ 12, can enumerate alkyl phenyl carbonyl, alkyl phenoxy carbonyl, alkyl phenyl carbonyl acyloxy, alkoxyl phenyl carbonyl, alkoxy phenyloxycarbonyl, alkoxyl phenyl carbonyl acyloxy, alkylthio phenyl carbonyl, alkylthiophe-noxy carbonyl, alkylthio phenyl carbonyl acyloxy etc.

As CH ₂base can by O, S, OCO, COO, OCOO, the carbon number that CO or phenylene replace is the alkynyl of 1 ~ 12, ethinyl can be enumerated, 1-propinyl, 2-propynyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-ethyl-2-propynyl, 1-methyl-2-propynyl, pentynyl, hexin base, heptyne base, octyne base, n-heptylacetylene base, decynyl, undecyne base, dodecyne base, cyclooctyne base etc., be preferably the group of the hydrogen on removing triple bond, preferably ethinyl can be enumerated, 2-propynyl, 3-butynyl, 4-pentynyl, 5-hexin base, 6-heptyne base, 7-octyne base, 8-n-heptylacetylene base, 9-decynyl, 10-undecyne base, 11-dodecyne base.

As CH ₂the carbon number that base can be replaced by O, S, OCO, COO, OCOO, CO or phenylene be the alkenyl of 1 ~ 12, can be straight-chain can be also branched, and preferably straight-chain, is vinyl; Third-1-alkene or the third-2-alkene; But-1-ene, but-2-ene or fourth-3-alkene, penta-1-alkene, penta-2-alkene, penta-3-alkene or penta-4-alkene; Own-1-alkene, own-2-alkene, own-3-alkene, own-4-alkene or oneself-5-alkene; Heptan-1-alkene, hept-2-ene", heptan-3-alkene, heptan-4-alkene, heptan-5-alkene or heptan-6-alkene; Pungent-1-alkene, oct-2-ene, pungent-3-alkene, pungent-4-alkene, pungent-5-alkene, oct-6-ene or pungent-7-alkene; The ninth of the ten Heavenly Stems-1-alkene, the ninth of the ten Heavenly Stems-2-alkene, the ninth of the ten Heavenly Stems-3-alkene, the ninth of the ten Heavenly Stems-4-alkene, the ninth of the ten Heavenly Stems-5-alkene, the ninth of the ten Heavenly Stems-6-alkene, the ninth of the ten Heavenly Stems-7-alkene or the ninth of the ten Heavenly Stems-8-alkene; The last of the ten Heavenly stems-1-alkene, the last of the ten Heavenly stems-2-alkene, the last of the ten Heavenly stems-3-alkene, the last of the ten Heavenly stems-4-alkene, the last of the ten Heavenly stems-5-alkene, the last of the ten Heavenly stems-6-alkene, the last of the ten Heavenly stems-7-alkene, the last of the ten Heavenly stems-8-alkene or the last of the ten Heavenly stems-9-alkene.For C ₂~ C ₇-1E-alkenyl, C ₄~ C ₇-3E-alkenyl, C ₅~ C ₇-4-alkenyl, C ₆~ C ₇-5-alkenyl and C ₇-6-alkenyl, particularly C ₂~ C ₇-1E-alkenyl, C ₄~ C ₇-3E-alkenyl and C ₅~ C ₇-4-alkenyl.The example of particularly preferred alkenyl is vinyl, 1E-propenyl, 1E-butenyl group, 1E-pentenyl, 1E-hexenyl, 1E-heptenyl, 3-butenyl group, 3E-pentenyl, 3E-hexenyl, 3E-heptenyl, 4-pentenyl, 4Z-hexenyl, 4E-hexenyl, 4Z-heptenyl, 5-hexenyl, 6-heptenyl etc.Usually preferably there is the group of the C atom of less than 5.

Be the alkoxy of 1 ~ 12 as carbon number, can enumerate methoxyl, ethoxy, propoxyl group, butoxy, amoxy, own oxygen base, heptan oxygen base, octyloxy, the ninth of the ten Heavenly Stems oxygen base, the last of the ten Heavenly stems oxygen base, undecane oxygen base, dodecyloxy.

In above-mentioned general formula (1), M preferably represent independently of each other hydrogen atom, fluorine atom, bromine atoms or carbon number be 1 ~ 12 alkyl, alkynyl, alkenyl or alkoxy (CH wherein ₂base can be replaced by O, S, OCO, COO, OCOO, CO or phenylene independently of one another), more preferably represent hydrogen atom, fluorine atom, bromine atoms or carbon number be 1 ~ 8 alkyl, alkynyl, alkenyl or alkoxy (CH wherein ₂base can be replaced by O, S, OCO, COO, OCOO, CO or phenylene independently of one another), particularly preferably represent hydrogen atom, fluorine atom, bromine atoms or carbon number be 1 ~ 4 alkyl, alkynyl, alkenyl or alkoxy (CH wherein ₂base can be replaced by O, S, OCO, COO, OCOO, CO or phenylene independently of one another).

In M, the substituent number beyond hydrogen atom is 0 ~ 4, is preferably 0 ~ 2, is more preferably 0.

In above-mentioned general formula (1), from the aspect taking into account high HTP and synthesis easiness, preferred M all represents hydrogen atom.

In above-mentioned general formula (1), R ¹represent linking group shown below

(wherein * represents the position with the oxygen atoms bond in general formula (1) respectively.R ³independently of one another represent carbon number be 1 ~ 3 alkyl or carbon number be the aryl of 6 ~ 10) in any one, wherein, preferably represent

R ³being preferably carbon number is independently of one another the alkyl or phenyl of 1 ~ 3, is more preferably alkyl, aryl, alkenyl.

Chiral agent represented by above-mentioned general formula (1) is particularly preferably the chiral agent represented by following general formula (3).

(in general formula (3), R ^arepresent any one in linking group shown below.

The concrete example of the chiral agent represented by above-mentioned general formula (1) is shown below, but the present invention not limit by following concrete example.It should be noted that, sometimes only exemplify R body or the S body of the chiral agent represented by above-mentioned general formula (1) below, but the S body of correspondence and R body also can be used for the present invention.Chiral agent represented by above-mentioned general formula (1) is preferably levorotation, and no matter the chiral agent represented by above-mentioned general formula (1) all demonstrates high HTP for R body or S body, therefore also can use as dextrorotatory chiral agent.

[table 1]

[table 2]

Chiral agent represented by above-mentioned general formula (1) can utilize the method recorded in known document or synthesize in the same manner as it.Such as, preferably utilize Heteroatom Chemistry, 2011vol.22, the method recorded is p.562 synthesized.

In addition, the R body of the chiral agent represented by above-mentioned general formula (1) and S body can only use the raw material of R body or S body to synthesize as raw material respectively, thus synthesize.In addition, known method also can be utilized to carry out optical resolution to raceme.

Next, the compound represented by following general formula (2) is described.

In general formula (2), R ²represent any one in substituting group shown below, two R ²mutually can be the same or different.

Wherein, * represents the position with the oxygen atoms bond in general formula (2) respectively.

Y ¹represent independently of one another singly-bound ,-O-,-C (=O) O-,-OC (=O)-, any one in-OC (=O) O-, be preferably singly-bound ,-O-,-OC (=O)-in any one, be more preferably-O-.

Sp ¹preferably represent that singly-bound or carbon number are the alkylidene of 1 ~ 8, are more preferably the alkylidene of carbon number 1 ~ 5 independently of one another, to be particularly preferably carbon number be 2 ~ 4 alkylidene.

Z ¹represent hydrogen atom or (methyl) acryloyl group independently of one another, be more preferably hydrogen atom.

N represents the integer of more than 1, is preferably 1 ~ 3, is more preferably 1 or 2, is particularly preferably 1.

Chiral agent represented by above-mentioned general formula (2) is particularly preferably the chiral agent represented by following general formula (4).

In general formula (4), R ^brepresent substituting group shown below, two R ^bmutually can be the same or different, preferably identical.

In above-mentioned substituting group, * represents the position with the oxygen atoms bond in general formula (4).

Y ²represent singly-bound ,-O-,-OC (=O)-in any one, be more preferably-O-.

Sp ²represent that singly-bound or carbon number are the alkylidene of 1 ~ 8, preferably carbon number is the alkylidene of 1 ~ 8, is more preferably the alkylidene that carbon number is 1 ~ 5, to be particularly preferably carbon number be 2 ~ 4 alkylidene.

Z ²represent hydrogen atom or (methyl) acryloyl group, be more preferably hydrogen atom.

The concrete example of the chiral agent represented by above-mentioned general formula (2) is below shown, but the present invention not limit by following concrete example.

3. tropism control agent

Cholesteric of the present invention is amassed body and preferably in above-mentioned reflection layer, is comprised tropism control agent.

The preferred exemplary of the tropism control agent that can use in the present invention can enumerate the tropism control agent of fluorine system.Also tropism control agent of more than two kinds can be contained.The tropism control agent of fluorine system can make the pitch angle of the molecule of liquid-crystal compounds reduce in the Air Interface of layer or make the molecule horizontal alignment in fact of liquid-crystal compounds.

It should be noted that, in this instructions, " horizontal alignment " refers to that long axis of liquid crystal molecule is parallel with face, does not require strictly parallel, refers to and the orientation that pitch angle formed by surface level is less than 20 degree in this instructions.Liquid-crystal compounds is near Air Interface when horizontal alignment, and be difficult to produce orientation defect, the transparency therefore in visible region raises, and increases at the reflectivity of region of ultra-red.On the other hand, if the molecule of liquid-crystal compounds is with large pitch angle orientation, then the screw axis of cholesteric crystal phase deviates from face normal, therefore reflectance reduction, or produces fingerprint pattern, demonstrates mist degree increase or diffractive, thus not preferred.

The compound exemplified in [0092] and [0093] of Japanese Unexamined Patent Publication 2005-99248 publication is comprised in the example of above-mentioned tropism control agent, the compound exemplified in [0076] ~ [0078] of Japanese Unexamined Patent Publication 2002-129162 publication and [0082] ~ [0085], the compound exemplified in [0094] and [0095] of Japanese Unexamined Patent Publication 2005-99248 publication, the compound exemplified in [0096] of Japanese Unexamined Patent Publication 2005-99248 publication.

As the tropism control agent of fluorine system, the compound also represented by preferred following general formula (I).

General formula (I)

(Hb ¹¹-Sp ¹¹-L ¹¹-Sp ¹²-L ¹²) _m11-A ¹¹-L ¹³-T ¹¹-L ¹⁴-A ¹²-(L ¹⁵-Sp ¹³-L ¹⁶-Sp ¹⁴-Hb ¹¹) _n11

In general formula (I), L ¹¹, L ¹³, L ¹³, L ¹⁴, L ¹⁵, L ¹⁵represent singly-bound ,-O-,-S-,-CO-,-COO-,-OCO-,-COS-,-SCO-,-NRCO-,-CONR-(R in general formula (I) represents that hydrogen atom or carbon number are the alkyl of 1 ~ 6) independently of one another,-NRCO-,-CONR-have the deliquescent effect of reduction, there is when film is made the tendency that haze value rises, thus-O-,-S-,-CO-,-COO-,-OCO-,-COS-,-SCO-is more preferably, from the aspect of the stability of compound, more preferably-O-,-CO-,-COO-,-OCO-.The adoptable alkyl of above-mentioned R can be straight-chain, also can be branched.Carbon number is more preferably 1 ~ 3, can exemplify methyl, ethyl, n-pro-pyl.

Sp ¹¹, Sp ¹², Sp ¹³, Sp ¹⁴represent that singly-bound or carbon number are the alkylidene of 1 ~ 10 independently of one another, be more preferably singly-bound or carbon number is the alkylidene of 1 ~ 7, more preferably singly-bound or carbon number are the alkylidene of 1 ~ 4.But the hydrogen atom of this alkylidene can be replaced by fluorine atoms.Alkylidene can have side chain, also can not have side chain, does not preferably have the alkylidene of the straight chain of side chain.From the aspect of synthesis, preferred Sp ¹¹with Sp ¹⁴identical and Sp ¹²with Sp ¹³identical.

A ¹¹, A ¹²it is the aromatic hydrocarbon of 3 valencys or 4 valencys.The carbon number of the aromatic hydrocarbyl of 3 valencys or 4 valencys is preferably 6 ~ 22, be more preferably 6 ~ 14, more preferably 6 ~ 10, be further preferably 6.A ¹¹, A ¹²3 represented valencys or the aromatic hydrocarbyl of 4 valencys can have substituting group.As this substituent example, can enumerate carbon number be 1 ~ 8 alkyl, alkoxy, halogen atom, cyano group or ester group.About explanation and the preferred scope of these groups, can record with reference to the correspondence of following T.As for A ¹¹, A ¹²the substituting group of 3 represented valencys or the aromatic hydrocarbyl of 4 valencys, such as, can enumerate methyl, ethyl, methoxyl, ethoxy, bromine atoms, chlorine atom, cyano group etc.The molecule in molecule with many perfluoroalkyl moieties can make liquid crystal aligning with less addition, reduces relevant with mist degree, thus has many perfluoroalkyls in molecule, A to make ¹¹, A ¹²4 valencys of being preferably.From the aspect of synthesis, preferred A ¹¹with A ¹²identical.

T ¹¹preferred expression by

Aromatic heterocycle (the above-mentioned T of shown divalent group or divalence ¹¹in the X that comprises represent carbon number be 1 ~ 8 alkyl, alkoxy, halogen atom, cyano group or ester group, Ya, Yb, Yc, Yd represent that hydrogen atom or carbon number are the alkyl of 1 ~ 4 independently of one another), be more preferably

More preferably

Further be preferably

Above-mentioned T ¹¹in the X that the comprises carbon number of alkyl that can adopt be 1 ~ 8, be preferably 1 ~ 5, be more preferably 1 ~ 3.Alkyl can be any one in straight-chain, branched, ring-type, is preferably straight-chain or branched.As preferred alkyl, methyl, ethyl, n-pro-pyl, isopropyl etc. can be exemplified, wherein preferable methyl.About above-mentioned T ¹¹in the X that the comprises moieties of alkoxy that can adopt, can with reference to above-mentioned T ¹¹in the X that the comprises explanation of alkyl that can adopt and preferred scope.As above-mentioned T ¹¹in the X that the comprises halogen atom that can adopt, fluorine atom, chlorine atom, bromine atoms, atomic iodine can be enumerated, preferred chlorine atom, bromine atoms.As above-mentioned T ¹¹in the X that the comprises ester group that can adopt, the group represented by R ' COO-can be exemplified.As R ', the alkyl that carbon number is 1 ~ 8 can be enumerated.The explanation of the alkyl that can adopt about R ' and preferred scope, can with reference to above-mentioned T ¹¹in the X that the comprises explanation of alkyl that can adopt and preferred scope.As the concrete example of ester, CH can be enumerated ₃cOO-, C ₂h ₅cOO-.The carbon number that Ya, Yb, Yc, Yd can adopt be 1 ~ 4 alkyl can for straight-chain, also can be branched.Such as, methyl, ethyl, n-pro-pyl, isopropyl etc. can be exemplified.

The aromatic heterocycle of above-mentioned divalence preferably has the heterocycle of 5 yuan, 6 yuan or 7 yuan.Preferably 5 rings or 6 rings, most preferably 6 rings further.As the heteroatoms forming heterocycle, preferred nitrogen atom, oxygen atom and sulphur atom.Heterocycle is preferably aromatic heterocycle.Aromatic heterocycle is generally unsaturated heterocycle.Preferably be up to the unsaturated heterocycle of double bond further.The example of heterocycle comprises furan nucleus, thiphene ring, pyrrole ring, pyrrolin ring, pyrrolidine ring, oxazole ring, isoxazole ring, thiazole ring, isothiazole ring, imidazole ring, imidazoline ring, imidazolidine ring, pyrazole ring, pyrazoline ring, pyrazolidine ring, triazole ring, furazan ring, tetrazole ring, pyranoid ring, thiazine ring, pyridine ring, piperidine ring, oxazine ring, morpholine ring, thiazine ring, pyridazine ring, pyrimidine ring, pyrazine ring, piperazine ring and triazine ring.The heterocyclic radical of divalence can have substituting group.About explanation and the preferred scope of this substituent example, can with reference to above-mentioned A ¹and A ²3 valencys or the relevant explanation of the aromatic hydrocarbon of the 4 valencys substituting group that can adopt and record.

Hb ¹¹represent that carbon number is the perfluoroalkyl of 2 ~ 30, be more preferably the perfluoroalkyl that carbon number is 3 ~ 20, preferably carbon number is the perfluoroalkyl of 3 ~ 10 further.Perfluoroalkyl can be any one in straight-chain, branched, ring-type, is preferably straight-chain or branched, is more preferably straight-chain.

M11, n11 are 0 ~ 3 independently of one another, and m11+n11 >=1.The structure now existed in multiple parantheses mutually can be identical, also can be different, preferably mutually identical.M11, n11 of general formula (I) are by above-mentioned A ¹¹, A ¹²valence mumber determine, preferred scope is also by A ¹¹, A ¹²the preferable range of valence mumber determine.

T ¹¹in o and p that comprise be independently of one another more than 0 integer, when o and p is more than 2, the X of more than 2 mutually can be identical, also can be different.T ¹¹in the o that comprises be preferably 1 or 2.T ¹¹in the p that comprises be preferably any one integer in 1 ~ 4, be more preferably 1 or 2.

Compound represented by mutual-through type (I), molecular structure can have symmetry, also can not have symmetry.It should be noted that, herein said symmetry refer to that corresponding points are symmetrical, line is symmetrical, any one in Rotational Symmetry, any one referring in, Rotational Symmetry symmetrical with point symmetry, line asymmetric does not all meet.

Compound represented by general formula (I) is by above-described perfluoroalkyl (Hb ¹¹), linking group-(-Sp ¹¹-L ¹¹-Sp ¹²-L ¹²) _m11-A ¹¹-L ¹³-and-L ¹⁴-A ¹²-(L ¹⁵-Sp ¹³-L ¹⁶-Sp ¹⁴-) _n11-and preferably as the compound that the T of the divalent group with excluded volume effect combines.At the perfluoroalkyl (Hb of molecular memory at two ¹¹) preferably mutually identical, molecular memory linking group-(-Sp ¹¹-L ¹¹-Sp ¹²-L ¹²) _m11-A ¹¹-L ¹³-and-L ¹⁴-A ¹²-(L ¹⁵-Sp ¹³-L ¹⁶-Sp ¹⁴-) _n11-also preferably mutually identical.The Hb of end ¹¹-Sp ¹¹-L ¹¹-Sp ¹²-and-Sp ¹³-L ¹⁶-Sp ¹⁴-Hb ¹¹be preferably the following group represented by any one general formula.

(C _aF _2a+1)-(C _bH _2b)-

(C _aF _2a+1)-(C _bH _2b)-O-(C _rH _2r)-

(C _aF _2a+1)-(C _bH _2b)-COO-(C _rH _2r)-

(C _aF _2a+1)-(C _bH _2b)-OCO-(C _rH _2r)-

In above formula, a is preferably 2 ~ 30, is more preferably 3 ~ 20, more preferably 3 ~ 10.B is preferably 0 ~ 20, is more preferably 0 ~ 10, more preferably 0 ~ 5.A+b is 3 ~ 30.R is preferably 1 ~ 10, is more preferably 1 ~ 4.

In addition, the Hb of the end of general formula (I) ¹¹-Sp ¹¹-L ¹¹-Sp ¹²-L ¹²-and-L ¹⁴-Sp ¹³-L ¹⁶-Sp ¹⁴-Hb ¹¹be preferably the following group represented by any one general formula.

(C _aF _2a+1)-(C _bH _2b)-O

(C _aF _2a+1)-(C _bH _2b)-COO-

(C _aF _2a+1)-(C _bH _2b)-O-(C _rH _2r)-O-

(C _aF _2a+1)-(C _bH _2b)-COO-(C _rH _2r)-COO-

(C _aF _2a+1)-(C _bH _2b)-OCO-(C _rH _2r)-COO-

A, b in above formula are identical with definition above with the definition of r.

Amass each reflection layer used in body about cholesteric of the present invention, the addition of above-mentioned fluorine system horizontal alignment agent is preferably 0.01 quality % ~ 10 quality % relative to above-mentioned polymerizable liquid crystal compound, is more preferably 0.01 quality % ~ 5 quality %, is particularly preferably 0.01 quality % ~ 1 quality %, is particularly preferably 0.01 quality % ~ 0.09 quality %, is particularly preferably 0.01 quality % ~ 0.06 quality % further.

In addition, each reflection layer used in body is amassed about cholesteric of the present invention, suppress for above-mentioned scope from the viewpoint of by the addition of above-mentioned fluorine system horizontal alignment agent, the horizontal alignment agent of above-mentioned fluorine system more preferably comprises perfluoroalkyl, particularly preferably comprises the perfluoroalkyl that carbon number is 3 ~ 10.

4. polymerization initiator

Cholesteric of the present invention amasss each reflection layer used in body preferably containing polymerization initiator.Such as, formed in the mode of cured film being cured reaction by Ultraviolet radiation, the polymerization initiator used preferably can by Ultraviolet radiation the Photoepolymerizationinitiater initiater of initiated polymerization.The example of Photoepolymerizationinitiater initiater can be enumerated: alpha-carbonyl compound (is recorded in No. 2367661st, United States Patent (USP), each instructions that No. 2367670th, United States Patent (USP)), acyloin ether (being recorded in United States Patent (USP) No. 2448828 instructions), α-hydrocarbon replaces aromatic acyloin compounds (being recorded in United States Patent (USP) No. 2722512 instructions), multinuclear naphtoquinone compounds (is recorded in No. 3046127th, United States Patent (USP), each instructions that No. 2951758th, United States Patent (USP)), the combination (being recorded in United States Patent (USP) No. 3549367 instructions) of triarylimidazoles dipolymer and p-aminophenyl ketone, acridine and compound phenazine (are recorded in Japanese Laid-Open Patent Publication 60-105667 publication, United States Patent (USP) No. 4239850 instructions) is with oxadiazole compound (being recorded in United States Patent (USP) No. 4212970 instructions), acylphosphine oxide compound (is recorded in Japanese Patent Publication 63-40799 publication, Japanese Patent Publication 5-29234 publication, Japanese Unexamined Patent Publication 10-95788 publication, Japanese Unexamined Patent Publication 10-29997 publication) etc.

The consumption of Photoepolymerizationinitiater initiater is preferably the 0.1 quality % ~ 20 quality % of composition (when referring to solid constituent for during coating fluid), is more preferably the 1 quality % ~ 8 quality % of composition (when referring to solid constituent for during coating fluid).

5. other compositions

Cholesteric of the present invention is amassed in each reflection layer used in body, except comprising compound, fluorine system horizontal alignment controlling agent and the polymerization initiator represented by above-mentioned general formula (Ia) and (Ib), solvent, other adjuvants (such as cellulose esters) can also be comprised as required.

(base material)

Cholesteric of the present invention is amassed body and is preferably had base material.

As above-mentioned base material, be not particularly limited, known base material can be used, be preferably transparent base.

As above-mentioned transparent base, as long as optically transparent transparent base is just not particularly limited, suitably can select according to object, such as can enumerate the transparent base that luminous ray transmissivity is more than 70%, preferred luminous ray transmissivity is the transparent base of more than 80%, the high transparent base etc. of transmissivity of near infrared range.

As above-mentioned base material, its shape, structure, size, material etc. are not particularly limited, suitably can select according to object.As above-mentioned shape, such as, can enumerate tabular etc., as said structure, can be single layer structure, can be also laminated structure, as above-mentioned size, suitably can select according to the size of above-mentioned infrared cut coating etc.

As the material of above-mentioned base material, be not particularly limited, suitably can select according to object, such as, as the material of transparent base, can enumerate by polyolefin-based resins such as tygon, polypropylene, poly-4-methyl-1-pentene, poly-1-butylenes; The polyester based resin such as polyethylene terephthalate, PEN; The film that the cellulose-based resin such as polycarbonate-based resin, polyvinyl chloride resin, polyphenylene sulfide system resin, polyethersulfone system resin, EOT system resin, Polyphony Ether resin, phenylethylene resin series, acrylic resin, polyamide series resin, polyimide system resin, cellulose acetate etc. are formed or their laminated film.Among these, particularly preferably polyethylene terephthalate film.

As the thickness of above-mentioned base material, be not particularly limited, can the application target of body amassed according to cholesteric and suitably select, be generally 10 μm ~ about 500 μm, from the aspect of the requirement of filming, preferably thinner.The thickness of above-mentioned base material is preferably 10 μm ~ 100 μm, is more preferably 20 μm ~ 75 μm, is particularly preferably 35 μm ~ 75 μm.If the thickness of above-mentioned base material is enough thick, then there is the tendency being difficult to bonding fault occurs.In addition, if the thickness of above-mentioned base material is enough thin, then when conforming to building materials or automobile, the hardness as material can not be excessively strong, has and hold easy working tendency.In addition, by making base material enough thin, there is the tendency that can suppress raw material expense.

(other layers)

Cholesteric of the present invention is amassed body and is preferably had at least one in easy adhesive linkage, hard conating, UV-absorbing layer, bonding coat and sealer further.

-Yi adhesive linkage-

Cholesteric of the present invention amasss body can have the outermost layer of easy adhesive linkage as one or both sides.Easy adhesive linkage such as has the function improved with the cementability of intermediate film for laminated glasses.More specifically, easy adhesive linkage has the function of the cementability of reflection layer and/or substrate and the intermediate film for laminated glasses improving cholesteric crystal phase.As can be used for the material forming easy adhesive linkage, polyvinyl butyral (PVB) resin can be enumerated.Polyvinyl butyral resin is the one of the Pioloform, polyvinyl acetal by acid catalyst, polyvinyl alcohol (PVA) (PVA) and butyraldehyde being reacted and generate, and refers to the resin of the repetitive with following structure.

Above-mentioned easy adhesive linkage is formed preferably by coating.Such as, the surface of the reflection layer of cholesteric crystal phase and/or the back side (not forming the surface of the side of reflection layer) of substrate can be formed at by being coated with.More specifically, 1 kind of polyvinyl butyral resin is dissolved in organic solvent and prepares coating fluid, by the surface of this coating solution to the reflection layer of cholesteric crystal phase and/or the back side of substrate, desirably carry out heating and make it dry, thus easy adhesive linkage can be formed.As the solvent of the preparation for coating fluid, such as, can use acetic acid methoxyl propyl ester (PGMEA), methyl ethyl ketone (MEK), isopropyl alcohol (IPA) etc.As coating process, existing known various method can be utilized.About temperature during drying, according to the difference of the material of the preparation for coating fluid, preferred scope is different, general preferably 140 DEG C ~ about 160 DEG C.Drying time is also not particularly limited, is generally 5 minutes ~ about 10 minutes.

In addition, above-mentioned easy adhesive linkage can be the layer being referred to as so-called prime coat, being formed by acrylic resin, styrene/acrylic resinoid, carbamate resins, vibrin etc.The easy adhesive linkage formed by these materials also can be formed by being coated with.These commercially available products it should be noted that, in commercially available polymer film, impart the polymer film of prime coat in addition, so also can be used as substrate.

It should be noted that, the thickness of easy adhesive linkage is preferably 0.1 μm ~ 2.0 μm.

-undercoat-

Cholesteric of the present invention amasss body can have undercoat between the reflection layer of cholesteric crystal phase and substrate.If the reflection layer of cholesteric crystal phase and the closing force of substrate weak, easily occurring in operation then when the reflection layer of lamination cholesteric crystal phase manufactures to peel off fault, easily causing when making laminated glass intensity (resistance to impact) to reduce.Thus, as undercoat, the layer of the cementability that can improve cholesteric and substrate can be utilized.On the other hand, substrate or substrate and undercoat are being peeled off, when by the parts such as middle diaphragm and reflection layer integration, need the weak cementability of the degree that can peel off at the interface of the reflection layer of substrate and undercoat or undercoat and cholesteric crystal phase.In rear operation, diaphragm in the middle of lamination is made, then the preferred interface peel at undercoat and substrate if consider.

The example that can be used for the material forming undercoat comprises acrylate copolymer, polyvinylidene chloride, styrene-butadiene rubber (SBR), waterborne polyester etc.In addition, by mode bonding with intermediate coat for the surface of undercoat, the cementability of preferred undercoat and intermediate coat is good, and from this point of view, undercoat is preferably simultaneously containing polyvinyl butyral resin and above-mentioned material.In addition, because the required appropriateness as mentioned above of undercoat regulates closing force, so preferably suitably use the hard coat agents such as twain-aldehyde compound or boric acid such as glutaraldehyde, 2,3-dihydroxy-Isosorbide-5-Nitrae-dioxane to make film hardening.The addition of hard coat agent is preferably 0.2 quality % ~ 3.0 quality % of the dry mass of undercoat.

The thickness of undercoat is preferably 0.05 μm ~ 0.5 μm.

-oriented layer-

Cholesteric of the present invention amasss body can have oriented layer between the reflection layer of cholesteric crystal phase and substrate.Oriented layer has the function of the direction of orientation of the liquid-crystal compounds in more critically regulation cholesteric.Oriented layer can pass through the friction treatment of organic compound (preferred polymers), mineral compound oblique evaporation, formed and there is the methods such as the layer of micron groove arrange.And, also known by applying electric field, apply magnetic field or illumination and penetrate and produce the oriented layer of orientation function.Oriented layer is formed on the film surface of polymkeric substance preferably by friction treatment.

Oriented layer is preferably adjacent with the reflection layer of cholesteric crystal phase, and therefore oriented layer is preferably located between the reflection layer of cholesteric crystal phase and substrate or undercoat.But undercoat also can have the function of oriented layer.In addition, also oriented layer can be had between reflection layer.

Oriented layer preferably all has closing force to a certain degree to any one in the reflection layer of adjacent cholesteric crystal phase and undercoat or substrate.But, when while peel off substrate while when fitting with the polarizer of the phase differential with 1/2 wavelength and make infrared cut coating or make lamination intermediate coat sheet from the reflection layer of cholesteric crystal phase, any one interface in the reflection layer/oriented layer/undercoat/substrate of cholesteric crystal phase, needs the more weak degree that can peel off.The interface of carrying out peeling off can be arbitrary interface, and in rear operation, make diaphragm in the middle of lamination if consider, then the preferred interface at oriented layer and undercoat is peeled off.

As being used as the material of oriented layer, preferably having the polymkeric substance of organic compounds, often using the polymkeric substance that itself can be cross-linked or carrying out the polymkeric substance that is cross-linked by crosslinking chemical.Certainly, the polymkeric substance with these two kinds of functions can also be used.As the example of polymkeric substance, polymethylmethacrylate can be enumerated, acrylic acid/methacrylic acid copolymer, styrene/maleimide copolymer, polyvinyl alcohol (PVA) and modified polyvinylalcohol, poly-(N hydroxymethyl acrylamide), styrene/ethylene base toluene copolymers, chlorosulfonated polyethylene, cellulose nitrate, Polyvinylchloride, chloridized polyolefin, polyester, polyimide, vinyl acetate/vinyl chloride copolymer, ethylene/vinyl acetate, carboxymethyl cellulose, gelatin, tygon, the compounds such as the polymkeric substance such as polypropylene and polycarbonate and silane coupling agent.As the example of preferred polymkeric substance, for water-soluble polymerss such as poly-(N hydroxymethyl acrylamide), carboxymethyl cellulose, gelatin, polyvinyl alcohol (PVA) and modified polyvinylalcohols, preferred gelatin, polyvinyl alcohol (PVA) and modified polyvinylalcohol, can enumerate polyvinyl alcohol (PVA) and modified polyvinylalcohol especially further.In addition, by mode bonding with intermediate coat for the surface of oriented layer, the cementability of preferred orientation layer and intermediate coat is good, and from this point of view, oriented layer is preferably simultaneously containing polyvinyl butyral resin and above-mentioned material.

The thickness of above-mentioned oriented layer is preferably 0.1 μm ~ 2.0 μm.

-hard conating-

In order to give mar resistance, also preferably comprise the hard conating with hard painting property.Metal oxide particle can be comprised in hard conating.

As above-mentioned hard conating, be not particularly limited, also its kind and formation method can be suitably selected according to object, such as, thermohardening type or the photocurable resin etc. such as acrylic resin, silicone-based resin, melamine series resin, carbamate system resin, alkyd system resin, fluorine resin can be enumerated.As the thickness of above-mentioned hard conating, be not particularly limited, suitably can select according to object, preferably 1 μm ~ 50 μm.If form anti-reflecting layer and/or antiglare layer further on above-mentioned hard conating, then can obtain the functional membrane also except mar resistance with antireflection and/or anti-glare, thus preferably.In addition, in above-mentioned hard conating, also above-mentioned metal oxide particle can be contained.

-ultraviolet light absorber-

Cholesteric of the present invention is amassed body and is preferably had the layer comprising ultraviolet light absorber.

The above-mentioned layer containing ultraviolet light absorber suitably can be selected according to object, different according to the kind of ultraviolet light absorber, can impact, be therefore preferably added in the parts (layer, substrate etc.) beyond reflection layer the orientation of liquid crystal.Embodiments of the present invention can take various form, compared with reflection layer, are preferably added in the parts of the more first incidence of light.Such as, be preferably added into and be configured in the layer configured between the glass plate of outside and the reflection layer of cholesteric crystal phase.Or, preferably also be contained in the intermediate coat bonding with the glass plate being configured at outside or be configured in the glass plate self of outside.

As the example of compound that can be used as ultraviolet light absorber, the ultraviolet light absorbers such as benzotriazole system, benzo two mercaptan system, coumarin series, benzophenone series, salicylate system, cyanoacrylate system can be enumerated; Titania, zinc paste etc.The example of particularly preferred ultraviolet light absorber comprise Tinuvin326,328,479 (being Ciba Japan society to manufacture) etc.In addition, the kind of ultraviolet light absorber, blend amount are not particularly limited, suitably can select according to object.Particularly, make the transmission of ultraviolet rays of below wavelength 380nm be the effect of less than 0.1% if the parts containing ultraviolet light absorber have, then significantly can alleviate the deterioration of reflection layer, especially can alleviate the xanthochromia that ultraviolet causes, thus preferably.Thus, kind and the blend amount of ultraviolet light absorber is preferably decided according to the mode meeting this characteristic.

-adhesive phase-

Cholesteric of the present invention is amassed body and is preferably had adhesive phase (hereinafter also referred to as bonding coat).Above-mentioned bonding coat can comprise ultraviolet light absorber.

As can be used for the material forming above-mentioned bonding coat, be not particularly limited, suitably can select according to object, such as, can enumerate polyvinyl butyral (PVB) resin, acrylic resin, styrene/acrylic resinoid, carbamate resins, vibrin, organic siliconresin etc.They can be used alone one, also can share two or more.The bonding coat be made up of these materials can be formed by being coated with.

In addition, in above-mentioned bonding coat, also antistatic agent, lubricant, anti blocking agent etc. can be added.

As the thickness of above-mentioned bonding coat, preferably 0.1 μm ~ 10 μm.

[cholesteric amasss the manufacture method of body]

The method of body is amassed as manufacture cholesteric of the present invention, be not particularly limited, suitably can select according to object, such as, can enumerate following method: utilize dip coater, mould to be coated with the coating solution of nearly infrared-reflecting layers or the near infrared ray absorption layer such as machine, slit coater, bar coater, gravure coater to the method on the surface of the lower floors such as above-mentioned supporter; The method such as LB embrane method, self-organization method, spraying coating is utilized to carry out the method for planar orientation.And then, wherein preferably utilize bar coater to carry out the method be coated with.

Wherein, the manufacture method preferably utilizing following cholesteric of the present invention to amass body amasss body to manufacture cholesteric of the present invention.

The feature that cholesteric of the present invention amasss the manufacture method of body is, this manufacture method has following operation:

By such formation, can easily and high productivity ground manufacture cholesteric of the present invention amass body.

Cholesteric of the present invention is amassed in the manufacture method of body, and utilizing containing Rod-like liquid crystal compound, HTP is 30 μm ^-1the polymerizable liquid crystal compound of the reflection layer Xa of above dextrorotatory chiral agent, forms coated film by being coated with.When forming coated film, lower floor being not particularly limited, preferably including the operation be applied to by the polymerizable liquid crystal compound of above-mentioned reflection layer Xa on base material.But the polymerizable liquid crystal compound of above-mentioned reflection layer Xa is not limited to the mode being directly applied to base material, also can be applied in other reflection layers or oriented layer.

In addition, cholesteric of the present invention is amassed in the manufacture method of body, about other reflection layers beyond above-mentioned reflection layer Xa and above-mentioned reflection layer Xb, also preferably include following operation: the operation being coated with the polymerizable liquid crystal compound of other reflection layer; Heat is applied to the polymerizable liquid crystal compound of other reflection layer and forms the operation of the state of cholesteric crystal phase; Irradiate active radioactive ray to be fixed by cholesteric crystal with to the polymerizable liquid crystal compound of other reflection layer, thus form the operation of other reflection layer.

When being formed cholesteric of the present invention by coating and amassing each reflection layer of body, other the adjuvant such as solvent, surfactant can be added in the polymerizable liquid crystal compound being used as coating fluid.

Solvent:

As for the formation of the solvent of constituent amassing each reflection layer used in body in cholesteric of the present invention, preferably with an organic solvent.The example of organic solvent comprises: acid amides (such as N, dinethylformamide), sulfoxide (such as dimethyl sulfoxide (DMSO)), heterogeneous ring compound (such as pyridine), hydrocarbon (such as benzene, hexane), alkyl halide (such as chloroform, methylene chloride), ester (such as methyl acetate, butyl acetate), ketone (such as acetone, MEK, cyclohexanone), ether (such as tetrahydrofuran, 1,2-dimethoxy-ethane).Preferred alkyl halide and ketone.Two or more organic solvents can be share.

When being formed cholesteric of the present invention by coating and amassing each reflection layer of body, preferably after the above-mentioned coating fluid of coating, utilize known method to carry out drying, solidification, form each reflection layer.As drying means, preferably utilize the drying of heating.

One example of the manufacture method of each reflection layer is the manufacture method at least comprising following operation:

(1) at polymerizable liquid crystal compound such as coating such as the surface of substrate etc., the state of cholesteric crystal phase is formed;

(2) make it be cured reaction to above-mentioned polymerizable liquid crystal compound irradiation ultraviolet radiation, cholesteric crystal is fixed, forms each reflection layer.

A surface of substrate is carried out the operation of twice (1) and (2) repeatedly, thus the cholesteric that form same with the formation shown in Fig. 1 can be made amasss body.

It should be noted that, the kind that the sense of rotation of cholesteric crystal phase can pass through used liquid crystal or the kind of chiral agent of adding adjust, and pitch (that is, selecting reflection wavelength) can be adjusted arbitrarily by the concentration of these materials.In addition, the wavelength of the specific region that known each reflection layer reflects can the displacement because of the various factors of manufacture method, except the interpolation concentration of chiral agent etc., conditions such as the temperature of fixing cholesteric crystal phase time, illumination and irradiation time etc. can also be utilized and make its displacement.

In above-mentioned (1) operation, first, above-mentioned polymerizable liquid crystal compound is coated with on the surface of the reflection layer of substrate etc. or lower floor.Above-mentioned polymerizable liquid crystal compound, preferably by material dissolves and/or be scattered in solvent, is prepared with the form of coating fluid.The coating of above-mentioned coating fluid can be undertaken by the various method such as line rod rubbing method, extrusion coating methods, directly gravure coating process, anti-gravure coating process, mould Tu Fa.In addition, can also ink discharge device be used, from nozzle ejection liquid-crystal composition, form film.

Next, surface will be coated and the polymerizable liquid crystal compound defining film forms the state of cholesteric crystal phase.Preparing in the mode of above-mentioned polymerizable liquid crystal compound with the form of wrapping solvent-laden coating fluid, sometimes can by dried coating film be removed desolventizing and forms the state of cholesteric crystal phase.In addition, in order to reach the temperature to cholesteric crystal phase in version, as required, above-mentioned film can be heated.Such as, be heated to the temperature of isotropic phase for the time being, afterwards, then be cooled to cholesteric crystal phase transition temperature etc., stably can form the state of cholesteric crystal phase thus.From the viewpoint of manufacture adaptability etc., the liquid crystal phase transition temperature of above-mentioned polymerizable liquid crystal compound is preferably in the scope of 10 DEG C ~ 250 DEG C, is more preferably in the scope of 10 DEG C ~ 150 DEG C.If be less than 10 DEG C, then in order to temperature being reduced to the temperature range presenting liquid crystal phase, sometimes need refrigerating work procedure etc.In addition, if more than 200 DEG C, then need high temperature in order to the formation temperature isotropic liquid state higher than the temperature range presenting liquid crystal phase for the time being, from the viewpoint of the distortion of the waste of heat energy, substrate, rotten etc. also unfavorable.

Next, in the operation of (2), to the film irradiation ultraviolet radiation defining cholesteric crystal phase state, be cured reaction.The light sources such as UV-lamp are used in Ultraviolet radiation.In this operation, by irradiation ultraviolet radiation, the curing reaction of above-mentioned polymerizable liquid crystal compound carries out, and cholesteric crystal is fixed mutually, defines reflection layer.

Ultraviolet irradiation energy is not particularly limited, but usual preferably 100mJ/cm ²~ 800mJ/cm ²left and right.In addition, the time of above-mentioned film irradiation ultraviolet radiation is not particularly limited, but can determines from the sufficient intensity of cured film and these two aspects of throughput rate.

In order to promote curing reaction, Ultraviolet radiation can be implemented in a heated condition.In addition, temperature during Ultraviolet radiation preferably maintains the temperature range presenting cholesteric crystal phase, makes cholesteric crystal mutually can not be disorderly.In addition, because the oxygen concentration of atmosphere is relevant with the degree of polymerization, thus do not reach in atmosphere the desired degree of polymerization, film strength insufficient when, reduce the oxygen concentration in atmosphere preferably by methods such as nitrogen displacements.As preferred oxygen concentration, be preferably less than 10%, more preferably less than 7%, most preferably be less than 3%.From the physical strength of retaining layer etc. or suppress the aspects such as unreacted reactant flows out from layer to be considered, the reaction rate of the curing reaction (such as polyreaction) undertaken by Ultraviolet radiation is preferably more than 70%, be more preferably more than 80%, be further preferably more than 90%.In order to improve reaction rate, increase the method or under nitrogen atmosphere or to carry out polymerization under heating condition be effective of the ultraviolet irradiation amount of irradiating.In addition, can also adopt with the following method: after polymerization for the time being, keep under higher than the condition of high temperature of polymerization temperature, to be advanced the method for reaction further by heat polymerization; Or, the method for irradiation ultraviolet radiation (wherein, irradiating under the condition meeting condition of the present invention) again.The mensuration of reaction rate can be carried out the absorption intensity of the infrared vibrational spectra of comparative reactivity group (such as polymerizable group) by the front and back of carrying out in reaction and carry out.

In above-mentioned operation, cholesteric crystal is fixed mutually, defines each reflection layer.Herein, about the state by liquid crystal phase " immobilization ", the state that the orientation defining the Rod-like liquid crystal compound of cholesteric crystal phase is kept is the most typical and preferred mode.Be not limited in this, specifically, if typically refer under 0 DEG C ~ 50 DEG C more exacting terms then the temperature range of-30 DEG C ~ 70 DEG C, this layer does not have mobility, also can not change in orientation form because of outfield or external force, stably can continue the state keeping immobilized orientation form.In the present invention, the curing reaction undertaken by Ultraviolet radiation is preferably utilized the state of orientation of cholesteric crystal phase to be fixed.

It should be noted that, in the present invention, as long as the optical property of cholesteric crystal phase is kept namely being enough in layer, do not require that the liquid-crystal composition in final each reflection layer demonstrates liquid crystal liquid crystal property.Such as, liquid-crystal composition is quantized by curing reaction generation macromolecule, and can lose liquid crystal liquid crystal property.

[cholesteric amasss the assembly of body]

The feature that cholesteric of the present invention amasss the assembly of body is, it has plural cholesteric of the present invention and amasss body, it is mutually different that above-mentioned cholesteric amasss body selection reflection wavelength each other, amasss body have at least one in bonding coat and adhesive linkage each other in above-mentioned cholesteric.

By such formation, can under wide band wavelength reflect visible light.

The selection reflection wavelength that above-mentioned cholesteric amasss body refers to, above-mentioned cholesteric to amass in body in by 1 layer of above-mentioned reflection layer Xa and 1 layer group that above-mentioned reflection layer Xb forms the above-mentioned reflection layer Xa that comprises and the selection reflection wavelength of above-mentioned reflection layer Xb mutual equal time selection reflection wavelength.But, above-mentioned cholesteric amass in body have more than 2 groups by 1 layer of above-mentioned reflection layer Xa and 1 layer group that above-mentioned reflection layer Xb forms, the above-mentioned reflection layer Xa comprised respectively in each group is mutually equal with the selection reflection wavelength of above-mentioned reflection layer Xb, the selection reflection wavelength of the above-mentioned reflection layer Xa comprised in different groups is mutually different, and the selection reflection wavelength of the above-mentioned reflection layer Xb comprised in different groups mutually different when, refer to the above-mentioned reflection layer Xa that comprises in whole groups and the selection reflection wavelength of above-mentioned reflection layer Xb mutual equal time selection reflection wavelength (now, there is two or more in the selection reflection wavelength that cholesteric amasss body).

Above-mentioned cholesteric is amassed the body mutual difference of selection reflection wavelength each other and is referred to, above-mentioned cholesteric amasss the difference of body selection reflection wavelength each other more than 20nm.But, when the selection reflection wavelength that above-mentioned cholesteric amasss body exists two or more, any one referring to that a cholesteric amasss that all selection reflection wavelengths of body and another cholesteric amass body selects the difference of reflection wavelength all more than 20nm.

< cholesteric amasss the characteristic > of the assembly of body

Reflection characteristic cholesteric of the present invention being amassed to the assembly of body is not particularly limited, and can be the formation of the visible ray of any frequency band of reflection.In addition, amass number that comprise in the assembly of body, that select the mutually different cholesteric plural of the present invention of reflection wavelength to amass body to be not particularly limited cholesteric of the present invention, can decide according to the frequency band of reflect visible light.

From the viewpoint of the high light of the visibility reflecting people efficiently, the maximal value that cholesteric of the present invention amasss the transmissivity of assembly preferably in the scope of 420nm ~ 680nm of body is less than 10%.When for this characteristic, cholesteric of the present invention is amassed number that comprise in the assembly of body, that select the mutually different cholesteric plural of the present invention of reflection wavelength to amass body and is preferably 2 ~ 10, is more preferably 6 ~ 10.

On the other hand, from the viewpoint of for special filter, the maximal value that cholesteric of the present invention amasss the transmissivity of assembly preferably in the scope of 450nm ~ 500nm and the scope of 600nm ~ 660nm of body is less than 10%, be more than 20% in the transmissivity of 550nm.When forming this characteristic, cholesteric of the present invention is amassed number that comprise in the assembly of body, that select the mutually different cholesteric plural of the present invention of reflection wavelength to amass body and is preferably 2 ~ 10, is more preferably 2 ~ 6.

Difference cholesteric of the present invention being amassed to body selection reflection wavelength (peak wavelength) is each other not particularly limited, suitably can change according to selecting the frequency band of reflection wavelength, such as, be preferably more than 20nm, be more preferably more than 30nm, be particularly preferably more than 40nm.

< cholesteric amasss the formation > of the assembly of body

The cholesteric of the present invention assembly that amasss body amasss body in above-mentioned cholesteric and has at least one in bonding coat and adhesive linkage each other.As bonding coat, bonding sheet can be used.As adhesive linkage, the bonding agent of biliquid mixed type, single liquid heat-curing type or light-cured type can be used, preferably use water white bonding agent.It should be noted that, bonding coat or adhesive linkage can distinguish each use 1 layer, also can be more than 2 layers.In addition, also bonding coat and adhesive linkage can be combinationally used.

Cholesteric of the present invention shown in Fig. 3 amasss an example of the formation of the assembly of body.Fig. 3 is laminated with to amass the schematic diagram of the assembly 22 of body across the cholesteric that bonding coat 11 is laminated with the 2nd reflection layer Xb (14b) and the 2nd reflection layer Xa (14a) by the 1st reflection horizon Xa (14a) of cholesteric immobilization with by the 1st reflection layer Xb (14b) of cholesteric immobilization on the base substrate 12.In the formation of Fig. 3, selection reflection wavelength that is equal at the selection reflection wavelength of the 1st reflection horizon Xa and the 1st reflection layer Xb, the 2nd reflection horizon Xa and the 2nd reflection layer Xb is equal, and then the 1st the selection reflection wavelength of reflection horizon Xa and the 1st reflection layer Xb mutually different, the selection reflection wavelength of the 2nd reflection horizon Xa and the 2nd reflection layer Xb is mutually different.

Cholesteric of the present invention is amassed in the assembly of body the cholesteric of the present invention comprised and is amassed body and can comprise above-mentioned base material, also above-mentioned base material can not be comprised, from the aspect of filming, cholesteric of the present invention is amassed in the assembly of body the above-mentioned base material comprised and is preferably the less number of plies, is more preferably 1 layer.

< cholesteric amasss the manufacture method > of the assembly of body

The manufacture method of the assembly of body is amassed as cholesteric of the present invention, be not particularly limited, can manufacture as follows: prepare out to be laminated with successively on base material by the 1st reflection horizon Xa of cholesteric immobilization and the 1st cholesteric of the 1st reflection layer Xb of cholesteric immobilization is amassed body, body is amassed by the 2nd reflection horizon Xa of cholesteric immobilization with by the 2nd cholesteric of the 2nd reflection layer Xb of cholesteric immobilization with being laminated with successively on base material, jointing material is given on the surface of the 1st cholesteric being amassed to the 1st reflection layer Xb in body, the 2nd cholesteric that jointing material is fitted amasss the 2nd reflection layer Xb in body, the assembly that this cholesteric amasss body can be manufactured thus.

Such as, the base material of formation recorded in shop drawings 3 is that the cholesteric of 1 layer is when amassing the assembly of body, after in above process the 1st cholesteric being amassed body and the long-pending consideration conjunction of the 2nd cholesteric, the above-mentioned base material 2nd cholesteric amassed in body is peeled off, thus can be manufactured.

Embodiment

Below, enumerate embodiment and comparative example, to further illustrate feature of the present invention.Material shown in following embodiment, consumption, ratio, contents processing, processing procedure etc., only otherwise departing from purport of the present invention can suitably change.Therefore, scope of the present invention should not be subject to the limited explanation of concrete example shown below.

[embodiment 1]

The preparation > of < cholesteric crystal potpourri (R1)

Using the compound in following compound 1, compound group B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (R1) being cholesteric crystal potpourri.

Compound 1

Compound group B

Compound 2

Compound 3:

Compound 4:

Fluorine system horizontal alignment agent 1

Fluorine system horizontal alignment agent 2

The preparation > of < cholesteric crystal potpourri (L1-1)

Using the compound in above-claimed cpd 1, above-claimed cpd group B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (L1-1) being cholesteric crystal potpourri.

Levorotation chiral agent (A)

< is for the manufacture of the preparation > of other coating fluids of film

(preparation of coating liquid for undercoat layer)

Prepare the coating liquid for undercoat layer (S1) of following shown composition.

The composition of coating liquid for undercoat layer (S1):

Acrylate resin Jurymer ET-410

(Toagosei Co., Ltd's manufacture, solid component concentration 30%) 50 mass parts

Methyl alcohol 50 mass parts

(preparation of oriented layer coating fluid)

Prepare the oriented layer coating fluid (H1) of following shown composition.

The oriented layer composition of coating fluid (H1):

The formation > of < coating, dry and film

On the surface of PET film (base coat, Fuji Photo Film Co., Ltd. manufactures, thickness: 50 μm, size 320mm × 400mm), use coiling rod painting bottom coating with coating fluid (S1), make dried thickness reach 0.25 μm.Afterwards, heat 10 minutes at 150 DEG C, carry out drying, solidification, define undercoat.

Next, on formed undercoat, use coiling rod coating oriented layer with coating fluid (H1), make dried thickness reach 1.0 μm.Afterwards, heat 2 minutes at 100 DEG C, carry out drying, solidification, define oriented layer.Friction treatment (rayon cloth, pressure: 0.1kgf, rotating speed: 1000rpm, transfer rate: 10m/ minute, number of times: come and go 1 time) is implemented to oriented layer.

Next, use the coating fluid as cholesteric crystal potpourri (R1) of above-mentioned preparation, fix cholesteric crystal phase by following process, manufacture the liquid crystal film fixed by cholesteric crystal as visible light reflecting layer.

(1) use coiling rod to be at room temperature applied to by above-mentioned coating fluid (R1) to be formed in undercoat in above-mentioned PET film and oriented layer, make the thickness of dried film reach 5 μm.

(2) at room temperature drying is heated 2 minutes, afterwards 35 DEG C of formation cholesteric crystal phases with except desolventizing for 30 seconds afterwards under the atmosphere of 90 DEG C.Next, use the electrodeless lamp " D bulb " (90mW/cm) that Fusion UV Systems Co., Ltd. manufactures, irradiate to export 60% UV carried out 6 ~ 12 seconds, fixing cholesteric crystal phase, makes and fixes cholesteric crystal cholesteric liquid crystal film mutually (F1) on a pet film.When being positioned on black paper by film (F1), confirm blue selection reflected colour.

In addition, using except coating fluid (L1-1) except replacing coating fluid (R1), utilizing the method identical with the method making cholesteric liquid crystal film (F1), having made cholesteric liquid crystal film (F1b-1).

< cholesteric amasss the making > of body

(1) use coiling rod to be at room temperature applied on above-mentioned film (F1) by above-mentioned coating fluid (L1-1), make the thickness of dried film reach 5 μm.

(2) at room temperature drying is heated 2 minutes, afterwards 35 DEG C of formation cholesteric crystal phases with except desolventizing for 30 seconds afterwards under the atmosphere of 90 DEG C.Next, use the electrodeless lamp " D bulb " (90mW/cm) that Fusion UV Systems Co., Ltd. manufactures, irradiate to export 60% UV carried out 6 ~ 12 seconds, fixing cholesteric crystal phase, making is fixed 2 layers of cholesteric crystal cholesteric mutually on a pet film and is amassed body (G1-1).Made cholesteric amasss body (G1-1) does not have significant defect and striped, in apparent good order and condition.In addition, cholesteric is amassed body (G1-1) when being positioned on black paper, confirm the selection reflected colour of strong blueness.This cholesteric is amassed body (G1-1) and amass body as the cholesteric of embodiment 1.

< cholesteric amasss the evaluation > of body

Determine the transmitted spectrum of cholesteric liquid crystal film (F1), (F1b-1), result selects reflection wavelength to be respectively 455nm, 453nm.In addition, determine the transmitted spectrum that cholesteric amasss body (G1-1), result observes a strong peak near 450nm.It can thus be appreciated that the cholesteric of applied coating solution (R1) and coating fluid (L1-1) has mutually equal selection reflection wavelength.It should be noted that, the selection reflection wavelength that cholesteric amasss body (G1-1) is 454nm, and reflecting wide is 66nm.Herein, reflect wide refer to by select reflection and make transmissivity be less than 50% wavelength coverage, reflect wide larger, then can reflect the light of wider scope.

Next, utilize haze meter to determine haze value that cholesteric amasss body (G1-1), the mean value measured for 3 times is as a result 0.3 (%).

In addition, calculate the HTP of the chiral agent for coating fluid (R1), coating fluid (L1-1) according to following formula, result is respectively 55 μm ^-1, 37 μm ^-1, both HTP are 30 μm ^-1above.

Formula:

HTP=1 ÷ { (pitch long (μm)) × (the quality % concentration of the chiral agent in solid constituent) }

(wherein, pitch long (μm) is calculated by (selecting reflection wavelength (μm)) ÷ (mean refractive index of solid constituent), assuming that the mean refractive index of solid constituent is 1.5 to calculate.)

These results are recorded in following table 3.

[embodiment 2]

The preparation > of < cholesteric crystal potpourri (L1-2)

Using the compound in following compound 1, compound group B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (L1-2) being cholesteric crystal potpourri.

Levorotation chiral agent (B)

< cholesteric amasss the making > of body

Use except coating fluid (L1-2) except replacing coating fluid (L1-1), utilize that the film (F1) that makes in embodiment 1 of the method identical with embodiment 1 is upper fixes cholesteric crystal phase, made and fixed 2 layers of cholesteric crystal cholesteric mutually on a pet film and amass body (G1-2).Made cholesteric amasss body (G1-2) does not have significant defect and striped, in apparent good order and condition.This cholesteric is amassed body (G1-2) and amass body as the cholesteric of embodiment 2.In addition, use coating fluid (L1-2) by replacing coating fluid (L1-1) and utilize the method identical with cholesteric liquid crystal film (F1b-1) to make cholesteric liquid crystal film (F1b-2).

The cholesteric utilizing the method identical with embodiment 1 to carry out embodiment 2 amasss the evaluation of body.Its result is recorded in following table 3.

The evaluation of the cholesteric liquid crystal film (F1b-2) made by having utilized the method identical with embodiment 1 to carry out.

[embodiment 3]

The preparation > of < cholesteric crystal potpourri (L1-3)

Using the compound in following compound 1, compound group B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (L1-3) being cholesteric crystal potpourri.

Levorotation chiral agent (C)

< cholesteric amasss the making > of body

Use except coating fluid (L1-3) except replacing coating fluid (L1-1), utilize that the film (F1) that makes in embodiment 1 of the method identical with embodiment 1 is upper fixes cholesteric crystal phase, made and fixed 2 layers of cholesteric crystal cholesteric mutually on a pet film and amass body (G1-3).Made cholesteric amasss body (G1-3) does not have significant defect and striped, in apparent good order and condition.This cholesteric is amassed body (G1-3) and amass body as the cholesteric of embodiment 3.In addition, use coating fluid (L1-3) by replacing coating fluid (L1-1) and utilize the method identical with cholesteric liquid crystal film (F1b-1) to make cholesteric liquid crystal film (F1b-3).

The cholesteric utilizing the method identical with embodiment 1 to carry out embodiment 3 amasss the evaluation of body.Its result is recorded in following table 3.

The evaluation of the cholesteric liquid crystal film (F1b-3) made by having utilized the method identical with embodiment 1 to carry out.

[comparative example 1]

The preparation > of < cholesteric crystal potpourri (L1-4)

Using the compound in following compound 1, compound group B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (L1-4) being cholesteric crystal potpourri.

Levorotation chiral agent (D): use in a comparative example

< cholesteric amasss the making > of body

Use except coating fluid (L1-4) except replacing coating fluid (L1-1), utilize that the film (F1) that makes in embodiment 1 of the method identical with embodiment 1 is upper fixes cholesteric crystal phase, made and fixed 2 layers of cholesteric crystal cholesteric mutually on a pet film and amass body (G1-4).Made cholesteric is amassed body (G1-4) and be observed defect line.This cholesteric is amassed body (G1-4) and amass body as the cholesteric of comparative example 1.In addition, use coating fluid (L1-4) by replacing coating fluid (L1-1) and utilize the method identical with cholesteric liquid crystal film (F1b-1) to make cholesteric liquid crystal film (F1b-4).

The cholesteric utilizing the method identical with embodiment 1 to compare example 1 amasss the evaluation of body.Its result is recorded in following table 3.

The evaluation of the cholesteric liquid crystal film (F1b-4) made by having utilized the method identical with embodiment 1 to carry out.

[embodiment 4]

The preparation > of < cholesteric crystal potpourri (R2)

Using following compound 1, compd B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (R2) being cholesteric crystal potpourri.

The preparation > of < cholesteric crystal potpourri (L2)

Using the compound in following compound 1, compound group B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (L2) being cholesteric crystal potpourri.

< cholesteric amasss the making > of body

Use except coating fluid (R2) except replacing coating fluid (R1), the method identical with the making of the film (F1) in embodiment 1 is utilized to make film (F2), use except coating fluid (L2) except replacing coating fluid (L1-1), the method identical with the making of the film (F1b-1) in embodiment 1 is utilized to make film (F2b), in addition, replace coating fluid (L1-1) and use coating fluid (L2), replace film (F1) and use film (F2), the method identical with embodiment 1 is utilized to carry out the coating of cholesteric crystal phase in addition, fixing, making is fixed 2 layers of cholesteric crystal cholesteric mutually on a pet film and is amassed body (G2).Made cholesteric amasss body (G2) does not have significant defect and striped, in apparent good order and condition.This cholesteric is amassed body (G2) and amass body as the cholesteric of embodiment 4.

The cholesteric utilizing the method identical with embodiment 1 to carry out embodiment 4 amasss the evaluation of body.Its result is recorded in following table 3.

Cholesteric liquid crystal film (F2) made by having utilized the method identical with embodiment 1 to carry out and the evaluation of (F2b).

[embodiment 5]

The preparation > of < cholesteric crystal potpourri (R3)

The preparation > of < cholesteric crystal potpourri (L3)

Using the compound in following compound 1, compound group B, the horizontal alignment agent of fluorine system, chiral agent, polymerization initiator, mix as the methyl ethyl ketone of solvent, prepare the coating fluid of following composition.Using obtained coating fluid as the coating fluid (L3) being cholesteric crystal potpourri.

< cholesteric amasss the making > of body

Use except coating fluid (R3) except replacing coating fluid (R1), the method identical with the making of the film (F1) in embodiment 1 is utilized to make film (F3), use except coating fluid (L3) except replacing coating fluid (L1-1), the method identical with the making of the film (F1b-1) in embodiment 1 is utilized to make film (F3b), in addition, replace coating fluid (L1-1) and use coating fluid (L3), replace film (F1) and use film (F3), the method identical with embodiment 1 is utilized to carry out the coating of cholesteric crystal phase in addition, fixing, making is fixed 2 layers of cholesteric crystal cholesteric mutually on a pet film and is amassed body (G3).Made cholesteric amasss body (G3) does not have significant defect and striped, in apparent good order and condition.This cholesteric is amassed body (G3) and amass body as the cholesteric of embodiment 5.

The cholesteric utilizing the method identical with embodiment 1 to carry out embodiment 5 amasss the evaluation of body.Its result is recorded in following table 3.

Cholesteric liquid crystal film (F3) made by having utilized the method identical with embodiment 1 to carry out and the evaluation of (F3b).

[table 3]

The cholesteric of embodiment 1 ~ 5 amasss body, and to employ more a small amount of HTP be 30 μm- ¹, there is not the orientation defect of liquid crystal in above chiral agent, the mist degree of laminated film is less than 0.5%, is good.On the other hand, in comparative example 1 HTP of chiral agent lower than 30 μm ^-1, the interpolation concentration improving chiral agent, to meet selection reflection wavelength, creates the orientation defect of liquid crystal, and mist degree rises.

Confirm: the cholesteric liquid crystal film (F1b-2) containing levorotatory chiral agent, the selection reflection wavelength of (F1b-3) and (F1b-4) are equal mutually with the cholesteric liquid crystal film (F1) containing dextrorotatory chiral agent.Confirm: the cholesteric liquid crystal film (F2b) containing levorotatory chiral agent is mutually equal respectively with the selection reflection wavelength of the cholesteric liquid crystal film (F2) containing dextrorotatory chiral agent and (F3) with the selection reflection wavelength of (F3b).

In addition, amass in body in the cholesteric of embodiment 1 ~ 5, reflection layer containing levorotatory chiral agent is mutually equal with the selection reflection wavelength of the reflection layer containing dextrorotatory chiral agent, and in the transmitted spectrum of laminate, also observe a strong peak.

[embodiment 6 ~ 12]

The preparation > of < cholesteric crystal potpourri

Following mixing above-claimed cpd 1, above-claimed cpd 2, fluorine system water alignment agent, polymerization initiator, solvent, and then make the kind of chiral agent and concentration as following table 4, mix thus, prepare various coating fluid.

[table 4]

Coating fluid	Chiral agent	Addition
			R4	LC756	6.1 mass parts
R5	LC756	5.5 mass parts
			R6	LC756	5.1 mass parts
R7	LC756	4.6 mass parts
			R8	LC756	4.1 mass parts
R9	LC756	7.2 mass parts
			R10	LC756	3.8 mass parts
L4	Chiral agent A	9.2 mass parts
			L5	Chiral agent A	8.4 mass parts
L6	Chiral agent A	7.5 mass parts
			L7	Chiral agent A	6.9 mass parts
L8	Chiral agent A	6.3 mass parts
			L9	Chiral agent A	11.2 mass parts
L10	Chiral agent A	5.9 mass parts

< cholesteric amasss the making > of body

In embodiment 6, at PET film (base coat, Fuji Photo Film Co., Ltd. manufactures, thickness: 50 μm, size 320mm × 400mm) surface on directly implement friction treatment (rayon cloth, pressure: 0.1kgf, rotating speed: 1000rpm, transfer rate: 10m/ minute, number of times: come and go 1 time), next, use coating fluid (R4), cholesteric crystal phase is fixed by following process, and then use coating fluid (L4), manufacture the liquid crystal film fixed by two-layer cholesteric crystal as visible light reflecting layer.

(1) use coiling rod to be at room temperature applied in above-mentioned PET film by coating fluid (R4), make the thickness of dried film reach 5 μm.

(2) at room temperature drying is heated 2 minutes, afterwards 35 DEG C of formation cholesteric crystal phases with except desolventizing for 30 seconds afterwards under the atmosphere of 90 DEG C.Next, use the electrodeless lamp " D bulb " (90mW/cm) that Fusion UV Systems Co., Ltd. manufactures, irradiate to export 60% UV carried out 6 ~ 12 seconds, fixing cholesteric crystal phase.Using made cholesteric liquid crystal film as cholesteric liquid crystal film (F4).

(3) use coiling rod to be at room temperature applied to by coating fluid (L4) in immobilized cholesteric liquid crystal film (F4), makes the thickness of dried film reach 5 μm in (2).

(4) at room temperature drying is heated 2 minutes, afterwards 35 DEG C of formation cholesteric crystal phases with except desolventizing for 30 seconds afterwards under the atmosphere of 90 DEG C.Next, use the electrodeless lamp " D bulb " (90mW/cm) that Fusion UV Systems Co., Ltd. manufactures, irradiate to export 60% UV carried out 6 ~ 12 seconds, fixing cholesteric crystal phase, making is fixed two-layer cholesteric crystal cholesteric mutually on a pet film and is amassed body (G4).Made cholesteric amasss body (G4) does not have significant defect and striped, in apparent good order and condition.In addition, cholesteric is amassed body (G4) when being positioned on black paper, confirm strong selection reflected colour.

In the operation of above-mentioned (1) and (2), used coating fluid (R4) is changed to (L4), make in the same manner as the operation of above-mentioned (1) and (2) in addition, using made cholesteric liquid crystal film as cholesteric liquid crystal film (F4b).

In embodiment 7 ~ 12, the 1st layer of coating fluid and the 2nd layer of coating fluid are changed to the material recorded in following table 5, and the following cholesteric shown in table 5 amasss body to have utilized the method identical with embodiment 6 to make in addition.Now, in the operation of above-mentioned (1) and (2), used coating fluid (R4) is changed to (R5) ~ (R10), make in the same manner as the operation of above-mentioned (1) and (2) in addition, using made cholesteric liquid crystal film as cholesteric liquid crystal film (F5) ~ (F10).In addition, in the making of cholesteric liquid crystal film (F4b), used coating fluid (L4) is changed to (L5) ~ (L10), make in the same manner as the making of cholesteric liquid crystal film (F4b) in addition, using made cholesteric liquid crystal film as cholesteric liquid crystal film (F5b) ~ (F10b).

[table 5]

The cholesteric of made embodiment 6 ~ 12 amasss body (G4), (G5), (G6), (G7), (G8), (G9), (G10) do not have significant defect and striped, in apparent good order and condition.When being positioned on black paper, cholesteric amasss body (G4), (G5), (G6), (G7) confirm strong selection reflected colour.

Confirm: the selection reflection wavelength of cholesteric liquid crystal film (F5b) ~ (F10b) containing levorotatory chiral agent is mutually equal respectively with the selection reflection wavelength of cholesteric liquid crystal film (F5) ~ (F10) containing dextrorotatory chiral agent.

< transmitted spectrum evaluates >

By amassing body (G1-1) to the cholesteric made respectively in embodiment 1,6 ~ 12, (G4), (G5), (G6), (G7), (G8), (G9), result that the transmitted spectrum of (G10) measures be shown in Fig. 4.Form cholesteric amass body (G4), (G5), (G6), (G7) respective two cholesteric owing to being mutually equal selection reflection wavelength, therefore, observe a strong peak under the transmitted spectrum of the laminate selection reflection wavelength shown in table 5, known have high reflecting properties.

[embodiment 13]

(cholesteric amasss the making of body)

Use except coating fluid (R4) except replacing coating fluid (L1-1), the film (F1) utilizing the method identical with embodiment 1 to make in embodiment 1 carries out the coating of cholesteric crystal phase, fix, and then use coating fluid (L1-1) to carry out the coating, fixing of cholesteric crystal phase by identical method thereon, finally use coating fluid (L4) to carry out the coating, fixing of cholesteric crystal phase by identical method, make and fix 4 layers of cholesteric crystal cholesteric mutually on a pet film and amass body (G10-2).Made cholesteric amasss body (G10-2) does not have significant defect and striped, in apparent good order and condition.

Utilize haze meter to determine haze value that cholesteric amasss body (G10-2), the mean value measured for 3 times is as a result 0.4 (%).

[embodiment 14]

(cholesteric amasss the making of body)

Use except coating fluid (R5) except replacing coating fluid (L1-1), the film (F1) utilizing the method identical with embodiment 1 to make in embodiment 1 carries out the coating of cholesteric crystal phase, fix, and then use coating fluid (R7), coating fluid (L1-1), coating fluid (L5), coating fluid (L7) to carry out the coating, fixing of cholesteric crystal phase successively by identical method thereon, make and fix 6 layers of cholesteric crystal cholesteric mutually on a pet film and amass body (G11).Made cholesteric amasss body (G11) does not have significant defect and striped, in apparent good order and condition, confirms the reflection demonstrating silver color.

Utilize haze meter to determine haze value that cholesteric amasss body (G11), the mean value measured for 3 times is as a result 0.6 (%).

[embodiment 15]

(cholesteric amasss the making of the assembly of body)

Amass on body (G1-1) in the cholesteric of embodiment 1 and paste double-sided adhesive sheet (manufacture of PDS-1, LINTEC society), the coated face that the cholesteric made in embodiment 6 amasss body (G4) is pasted at another adhesive surface, PET film cholesteric being amassed the base material of body (G4) is peeled off, making layer integrated membrane.And then paste double-sided adhesive sheet (manufacture of PDS-1, LINTEC society) thereon, the coated face that the cholesteric made in embodiment 8 amasss body (G6) is pasted at another adhesive surface, PET film cholesteric being amassed the base material of body (G6) is peeled off, making layer integrated membrane.Utilize identical method to paste the cholesteric made in embodiment 9 and amass body (G7), PET film cholesteric being amassed the base material of body (G7) is peeled off, and makes the assembly (G12) that cholesteric amasss body.

The transmitted spectrum cholesteric made in embodiment 15 being amassed to the assembly G12 of body measures, and shows the result in Fig. 5.

[embodiment 16]

(cholesteric amasss the making of the assembly of body)

Amass on body (G1-1) in the cholesteric of embodiment 1 and paste double-sided adhesive sheet (manufacture of PDS-1, LINTEC society), the coated face that the cholesteric made in embodiment 6 amasss body (G4) is pasted at another adhesive surface, PET film cholesteric being amassed the base material of body (G4) is peeled off, making layer integrated membrane.And then, utilize that cholesteric is amassed body (G5) by identical method, (G6), (G7), (G8), (G9), (G10) peel off each cholesteric and amass the base material PET film of body while paste successively, make the assembly (G13) that cholesteric amasss body.

The transmitted spectrum cholesteric made in embodiment 16 being amassed to the assembly G13 of body measures, and shows the result in Fig. 6.

The explanation of symbol

11 bonding coats

12 base materials

The reflection layer Xa of cholesteric immobilization (is 30 μm containing HTP by 14a, 16a ^-1above dextrorotatory chiral agent)

The reflection layer Xb of cholesteric immobilization (is 30 μm containing HTP by 14b, 16b ^-1above levorotatory chiral agent)

21 cholesteric amass body

22 cholesteric amass the assembly of body

Claims

1. cholesteric amasss a body, it is characterized in that, it has the reflection layer Xb of at least 1 layer reflection layer Xa and at least 1 layer,

Described reflection layer Xa is by the reflection layer of fixing of cholesteric crystal, and is 30 μm containing HTP ^-1above dextrorotatory chiral agent,

Described reflection layer Xb is by the reflection layer of fixing of cholesteric crystal, and is 30 μm containing HTP ^-1above levorotatory chiral agent,

The selection reflection wavelength of all described reflection layer Xa and all described reflection layer Xb is the scope of 400nm ~ 750nm,

The selection reflection wavelength of described reflection layer Xa of at least 1 layer is mutually equal with the selection reflection wavelength of the described reflection layer Xb of at least 1 layer,

Allly adjacent the reflection layer of described fixing of cholesteric crystal is carried out lamination in the mode contacted with each other each other.

2. cholesteric as claimed in claim 1 amasss body, and wherein, this cholesteric is amassed body and had base material further,

Configure according to described base material, the order of the described reflection layer Xb of described reflection layer Xa and at least 1 layer of at least 1 layer.

3. cholesteric as claimed in claim 1 or 2 amasss body, it is characterized in that, described levorotatory chiral agent is represented by following general formula (1) or following general formula (2),

In general formula (1), M represents hydrogen atom or substituting group independently of one another, R ¹represent any one in linking group shown below,

Wherein, * represents the position with the oxygen atoms bond in general formula (1) respectively, R ³independently of one another represent carbon number be 1 ~ 3 alkyl or carbon number be the aryl of 6 ~ 10,

In general formula (2), R ²represent any one in substituting group shown below, two R ²mutually can be the same or different,

Wherein, * represents the position with the oxygen atoms bond in general formula (2) respectively, Y ¹represent independently of one another singly-bound ,-O-,-C (=O) O-,-OC (=O)-, any one in-OC (=O) O-, Sp ¹represent that singly-bound or carbon number are the alkylidene of 1 ~ 8 independently of one another, Z ¹represent hydrogen atom or (methyl) acryloyl group independently of one another, n represents the integer of more than 1.

4. the cholesteric according to any one of claims 1 to 3 amasss body, it is characterized in that, described levorotatory chiral agent is represented by following general formula (3) or following general formula (4),

In general formula (3), R ^arepresent any one in linking group shown below,

Wherein, * represents the position with the oxygen atoms bond in general formula (3) respectively,

In general formula (4), R ^brepresent substituting group shown below, two R ^bmutually can be the same or different,

Wherein, * represents the position with the oxygen atoms bond in general formula (4), Y ²represent singly-bound ,-O-,-OC (=O)-in any one, Sp ²represent that singly-bound or carbon number are the alkylidene of 1 ~ 8, Z ²represent hydrogen atom or (methyl) acryloyl group.

5. the cholesteric according to any one of Claims 1 to 4 amasss body, it is characterized in that, this cholesteric is amassed body and had described reflection layer Xa and each one deck of described reflection layer Xb.

6. the cholesteric according to any one of Claims 1 to 4 amasss body, it is characterized in that, this cholesteric amass body have more than 2 layers, at least one in described reflection layer Xa and described reflection layer Xb,

The chiral agent comprised in all described reflection layer Xa is all identical,

The chiral agent comprised in all described reflection layer Xb is all identical.

7. the cholesteric according to any one of Claims 1 to 4 and 6 amasss body, it is characterized in that, this cholesteric amass body have more than 2 groups by 1 layer of described reflection layer Xa and 1 layer group that described reflection layer Xb forms,

The described reflection layer Xa comprised respectively in each group is mutually equal with the selection reflection wavelength of described reflection layer Xb,

The selection reflection wavelength of the described reflection layer Xa comprised in different groups is mutually different, and,

The selection reflection wavelength of the described reflection layer Xb comprised in different groups is mutually different.

8. the cholesteric according to any one of claim 1 ~ 7 amasss body, it is characterized in that, the mist degree that described cholesteric amasss body is less than 1%.

9. the cholesteric according to any one of claim 1 ~ 8 amasss body, it is characterized in that, this cholesteric amasss at least a kind that body has in easy adhesive linkage, hard conating, UV-absorbing layer, bonding coat and sealer further.

10. the cholesteric according to any one of claim 1 ~ 9 amasss body, it is characterized in that, the maximal value that this cholesteric amasss the transmissivity of body in the scope of 420nm ~ 680nm is less than 10%.

11. cholesteric according to any one of claim 1 ~ 10 amass body, it is characterized in that, the maximal value that this cholesteric amasss the transmissivity of body in the scope of 450nm ~ 500nm and the scope of 600nm ~ 660nm is less than 10%, is more than 20% in the transmissivity of 550nm.

12. 1 kinds of cholesteric amass the assembly of body, it is characterized in that, the cholesteric that this assembly has according to any one of plural claim 1 ~ 11 amasss body,

It is mutually different that described cholesteric amasss body selection reflection wavelength each other,

Amass body in described cholesteric and there is at least one in bonding coat and adhesive linkage each other.

13. cholesteric as claimed in claim 12 amass the assembly of body, it is characterized in that, the maximal value of the transmissivity of this assembly in the scope of 420nm ~ 680nm is less than 10%.

14. cholesteric as claimed in claim 12 amass the assembly of body, it is characterized in that, the maximal value of the transmissivity of this assembly in the scope of 450nm ~ 500nm and the scope of 600nm ~ 660nm is less than 10%, is more than 20% in the transmissivity of 550nm.

15. 1 kinds of cholesteric amass the manufacture method of body, it is characterized in that, this manufacture method has following operation:

Utilize the polymerizable liquid crystal compound of reflection layer Xa, coated film is formed by coating, heat is applied to the polymerizable liquid crystal compound of described reflection layer Xa and forms the state of cholesteric crystal phase, active radioactive ray are irradiated to be fixed by cholesteric crystal to the polymerizable liquid crystal compound of described reflection layer Xa, thus forming the reflection layer Xa of at least 1 layer, the polymerizable liquid crystal compound of wherein said reflection layer Xa contains Rod-like liquid crystal compound, HTP is 30 μm ^-1above dextrorotatory chiral agent; With

Utilize the polymerizable liquid crystal compound of reflection layer Xb, coated film is formed by coating, heat is applied to the polymerizable liquid crystal compound of described reflection layer Xb and forms the state of cholesteric crystal phase, active radioactive ray are irradiated to be fixed by cholesteric crystal to the polymerizable liquid crystal compound of described reflection layer Xb, thus forming the reflection layer Xb of at least 1 layer, the polymerizable liquid crystal compound of wherein said reflection layer Xb contains Rod-like liquid crystal compound, HTP is 30 μm ^-1above levorotatory chiral agent;

According to all adjacent modes that the reflection layer of described fixing of cholesteric crystal is contacted each other, the polymerizable liquid crystal compound of the reflection layer on upper strata is directly applied on the reflection layer of lower floor.