JPS5919940A - Photographic support - Google Patents

Abstract

PURPOSE:To enhance adhesion between a hydrophilic colloidal layer, such as a photosensitive emulsion layer, and a polyester support, by coating the polyester support with an aq. composition contg. a specified copolymer as an undercoat layer. CONSTITUTION:The intended photographic support is obtained by copolymerizing 3-45wt% monomer represented by formula I in which R1 is 2-4C alkylene, and R2 is H or methyl, such as 2-hydroxyethyl acrylate; 10-45wt% monomer represented by formula II in which R3 is 2-8C straight chain alkyl, such as propyl acrylate; and 10-70wt% monomer represented by formula III in which R4 is H or methyl, and R5 is 2-8C straight or branched alkyl, such as isopropyl acrylate; and coating the polyester support with an aq. compsn. contg. said obtained copolymer to form an undercoat layer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photographic support having a full subbing layer. More specifically, a specific aqueous copolymer composition was coated on a polyester support and subjected to subbing treatment in order to firmly adhere a hydrophilic colloid layer such as a photosensitive emulsion layer or a backing layer by RC. Related to photographic supports.

Polyester film has excellent physical properties of 1i[' as a support for halog/silver photosensitive materials, etc.
In recent years, its demand has increased and it is widely used. However,
Polyester films are extremely hydrophobic, and it is often difficult to create strong adhesion between such supports and hydrophilic colloid layers, such as photographic gelatin layers using substances such as gelatin as a binder. Accompany. Conventionally, in photographic photosensitive materials using polyester film,
Many subbing methods are known for adhering the support and the hydrophilic colloid layer, but in order to firmly adhere the gelatin layer to the hydrophilic colloid layer,
In either method, the swelling of polyester film 48
゛) In many cases, it was necessary to remove or completely use the dissolving agent. However, when a subbing composition that does not contain these swelling agents or solubilizing agents is applied to a polyester film, the flatness of the support is impaired during the subbing process; Since most of the dissolving agents use harmful disintegrating solvents, they have many drawbacks such as impairing work safety and health.

For this reason, it has been proposed to undercoat polyester films without using swelling agents or solubilizing agents. One technique is to create a polyester film whose surface has been chemically and physically treated, including chemical treatment, mechanical treatment, corona discharge treatment, flame treatment, ultraviolet treatment, high frequency treatment, Darrow radiation treatment, and activated plasma treatment. Supports subjected to surface activation treatments such as , laser treatment, mixed acid treatment, and ozone oxidation treatment have been proposed. This technology is disclosed in U.S. Patent No. 2,943°937, U.S. Patent No. 475,193, U.S. Pat. Yong Yong oath, special υ; 111 self 53
-13672, 55-18469, etc. are proposed. However, these surface treatments11. This is probably due to the fact that the polyester film, which was originally hydrophobic, has some co-polar groups on its surface, and that a thin layer that is a negative factor for adhesion on the extreme surface has been removed. Although the adhesive force with the photographic hydrophilic protective colloid layer increased, sufficient adhesive strength could not be obtained.

Furthermore, in order to increase the adhesion with a hydrophilic colloid layer for photography, a polyester film has been proposed in which a water-based coating composition layer is provided after surface treatment. This aqueous coating composition layer, so-called subbing layer, must have sufficient adhesion to both the polyester film and the photographic hydrophilic colloid layer. In particular, in order to ensure sufficient adhesion between the undercoat layer and the photographic hydrophilic colloid layer, the resin component of the undercoat layer (hereinafter referred to as the undercoat resin) generally contains a hydrophilic group or a reactive group. Things are being done.

The hydrophilic RAi or reactive groups include acids (e.g. acrylic acid, itaconic acid, semi-alkyl esters of itaconic acid, etc.), epoxy groups (e.g. glyc/dyl acrylate, glycidyl methacrylate, etc.), N-alkanol groups [ For example, N-methylolacrylamide, hydroquine methylated N-(1,1-dimethyl-3-oxobutyl)acrylamide, etc.], hydroxyl groups (eg, hydroxyethyl methacrylate, hydrogyzoether acrylate, etc.), and the like.

Among the above examples, an example in which the undercoating layer contains an undercoat resin containing an acid component is disclosed in Japanese Patent Publication No. 48-3564. No., Japanese Patent Publication No. 46-1123
- No. 50-1718, European Patent No. 1484
− No. LJ8 detailed oath, JP-A No. 54-61518, No. 50-
39536, US Pat. No. 3,545,972, and the like. However, in a polyester film having an entire undercoat layer containing an acid component in the undercoating resin, the adhesion of the photographic hydrophilic protective colloid layer during development processing was insufficient.

An example in which the undercoat layer contains an undercoat resin containing an epoxy group component is as follows:
Japanese Patent Publication No. 34-9629, Japanese Patent Publication No. 51-58469,
No. 52-104913, No. 51-27918, No. 5
No. 2-19786, 54-30121, 51-1
This method is disclosed in Japanese Patent Publication No. 21323, British Patent No. 1,168,171, and Japanese Patent Application Laid-open No. 55-69138. However, epoxy group components such as glycidyl methacrylate and glycidyl acrylate have self-crosslinking properties, decomposition, and deterioration during the synthesis of the resins cited below or during storage of the synthetic solution. The stability of the sub-coating processing liquid (hereinafter referred to as sub-coating liquid), which is an aqueous composition containing liquid or sub-coating resin, was insufficient.

Examples of the inclusion of a lower-cited resin containing an N-alkanol group component in the lower-line H include French Painting Patent No. 140,408 and JP-A-5
Publication No. 1-131516, British Patent No. 1,178,59
7th Akira +1! It is disclosed in Japanese Patent Publication No. 57-3054, etc. However, the N
-Alkanol acrylamides have strong self-crosslinking properties,
Crosslinking occurred during the synthesis of the undercoating resin or during the storage of the synthetic liquid, and the stability of the synthetic liquid and the subbing liquid was poor.

Examples of the undercoat layer containing a hydroxyl group-containing monomer and glycidyl acrylate and/or grindyl methacrylate are described in JP-A No. 55-69138 and No. 52-19786. The undercoat contained as a copolymer component of the cited resin is disclosed. Further, JP-A-51-135526 discloses a subcoat containing a vinyl monomer having a hydroxyl group and vinylidene chloride and/or vinyl chloride as a copolymer component of the resin cited below. Moreover, Pakkai Publication No. 123139/1989 discloses an undercoat containing a hydroxyl group-containing monomer and a diolefin monomer as co-combined components of the resin cited below. Historically, Japanese Unexamined Patent Publication No. 49-1168 es discloses a subbing comprising a copolymer component of a hydroxyl group-containing monomer and an acrylic ester or a methacrylic ester. However, these undercoat resins containing hydroxyl groups were not sufficient as undercoat layers or undercoat resins.

That is, in a subcoat containing a hydroxyl group-containing monomer and glycidyl acrylate or glycidyl methacrylate as a resin component, the jepoxy group and the hydroxyl group may be in an anti-1 ratio depending on the conditions.
[JL, the lowering resin in the synthesis liquid and lowering liquid was prone to precipitation, and the adhesion was unstable. -1k, in the case of a vinyl monopod having a hydroxyl group, vinylidene chloride and/or vinyl chloride, and a dichloromethane as a fat component, vinylidene chloride and vinyl chloride dehydrochloride occurs under the conditions, and the synthetic liquid or The pH of the drawn liquid changed and the adhesiveness was unstable. In addition, in the case of undercoats containing hydroxyl group-containing monomers and diolefin monomers as the undercoating resin components, undercoating (VC diolefins cause a crosslinking reaction during fat synthesis, and it is difficult to control the crosslinking reaction. It was difficult to obtain an undercoat, and as a result, the adhesion during development was unstable.Also, with an undercoat containing a copolymer of a hydroxyl group-containing monomer t-form and an acrylic ester or a methacrylic ester, The synthesis liquid and the subtracting liquid are mechanically unstable, and depending on the conditions, the copolymer may precipitate, making it impossible to subtract with stable performance!
It was difficult to learn how to do it.

As described above, photographic polyester films containing subbing resins containing hydrophilic groups or reactive groups in their subbing layers do not always have satisfactory stability and subbing performance during production. Ta.

By the way, there is a technology to provide a polyester film with a resin layer 'f' that looks like it could be used for photography, but it does not require performance that is completely different from the lower side of photography. , they are similar but not the same. For example, Japanese Patent Publication No. 19879/1987 discloses an adhesive obtained by coating a film with an aqueous dispersion of an acrylic acid ester and a hydroxyl group-containing vinyl monomer, and then coating a film with an easy-sole polymer. A film is disclosed. However, this sublayer is characterized by providing an intermediate anchor coating layer in order to bond the film to a hydrophobic, easily attached polymer such as a copolymer of vinylidene chloride and acrylic ester. The technical concept is completely different from that of photographic undercoating, in which a film and a photographic hydrophilic colloid layer are bonded together. By the way, the above-mentioned special public service 1976-19
The undercoating according to the technique disclosed in Japanese Patent No. 879 exhibits completely insufficient adhesion to photographic hydrophilic colloid layers.

The present inventors have focused on undercoating resins containing hydrophilic groups or reactive groups, and have found that they are stable in production and have excellent undercoating performance. i
As a result of intensive research on the subbing layer that can be obtained, it has been found that the above-mentioned drawbacks can be overcome if the monomers constituting the undercoating resin are combined in a specific manner.

A first object of the present invention is to provide a photographic support having strong adhesion between a polyester film and a photographic hydrophilic colloid layer.

The second object of the present invention is that since the organic solvent polyester swelling agent (b) does not necessarily require the use of a dissolving agent, harmful organic solvents etc. are not released into exhaust gas or wastewater, thereby reducing pollution. It is small enough to provide a photographic support that can be used without any need for a photographic support.

A third object of the present invention is to provide a photographic support with good flatness.

A fourth object of the present invention is that there is no need to use a polyester swelling agent or a WP agent, and there is no deterioration in the flatness and transparency of the polyester film caused by curling and rippling. A fifth object of the present invention is to provide a photographic support in which the transparency is not deteriorated by applying a resin layer. It is an object of the present invention to provide a dual-purpose fork carrier having layers.

A sixth object of the present invention is to provide a photographic support having a subbing layer made of a subbing resin with good storage stability.

The seventh object of the present invention is to provide a photographic support 'f! using a drawing liquid which has good storage stability and mechanical stability. :It is to provide. That is, the resin solution 1 used in the present invention does not need to contain any self-crosslinking (i (Ii) and degradable copolymer components, and therefore, during synthesis, during storage of the resin, and during storage of the sublayer solution). The undercoating resin used in the present invention is mechanically very stable, with no deterioration of the undercoating resin in the process, and no unfavorable changes in physical properties such as pH of the undercoating resin liquid or subbing liquid.
It is an object of the present invention to provide a photographic support using a subbing liquid which does not cause any aggregation during synthesis or application of the subbing liquid.

The eighth object of the invention is to provide a photographic support that can be stably produced and does not suffer from fluctuations in subbing performance due to heat during the subbing process and fluctuations in drying conditions.

A ninth object of the present invention is to provide a photographic support that does not adversely affect various photographic hydrophilic colloid layers, especially photographic emulsion layers.

The present inventors have discovered that satisfactory results can be obtained only when the hydrophilic group-containing monomer and the hydrophobic monomer in the resin cited below have a very limited combination, and have developed the present invention. [rl
This is achieved by a photographic support characterized by having a subbing layer obtained by providing an aqueous composition containing a copolymer consisting essentially of the monomers indicated by [ ] and [concave]. be done.

General formula [1] 112c = cn2? C0OR, OH [in the formula, +41) or alkylene group having 2 to 4 carbon atoms, Iζ
2 represents hydrogen IFrt-7- or a methyl group. ] General formula [11] 11gt? = crt 0OR3 [In the formula, IL5 represents a linear alkyl group having 2 to 80 carbon atoms. ] General formula [, 11) % formula % ) [In the formula, R4 represents a hydrogen atom or a methyl group. Shame represents a linear or branched alkyl group with a station count of 2 to 8, and when R4 is a hydrogen atom, it is branched, and when Shame is a methyl group, it is straight chain. ] The above general formula [T] in the copolymer used in the present invention
As a specific example of the monomer represented by, for example, 2-human'
Loki 7 ether acrylate, 2-hydroquine ether methacrylate, 2-'hydroxyprobyl acrylate,
2-Hydroquinether methacrylate, 2,2-dimethylhydrogysif.

Examples thereof include biru acrylate, 5-hydroxybentel acrylate, and the like. If this component is too small, the mechanical stability of the combination will be poor, and if it is too large, the adhesion will be poor. It is preferably 3 to 45 wt% based on the aggregate,
Especially preferably it is 10 to 35 wt%.

71. Used in the present invention. The above general formula in the copolymer [
Specific examples of the monomer represented by 8] include propyl acrylate, butyl acrylate, pennal acrylate, hequinyl acrylate, octyl acrylate, and the like. If this component is too small, the adhesion of the undercoat layer will be poor, while if it is too large, the synthesis stability will be poor. In this sense, the ratio of monomers represented by the above general formula [M] to the copolymer is preferably 10 to 45 wt %, particularly preferably tL<Fi, 15 to 40 wt 4.

The above general formula Cl in the copolymer used in the present invention
Specific examples of monomers represented by include 1so-propyl acrylate, t-bunalacrylate,
-bunal acrylate, 1so-butyl acrylate,
2-ethylhexol acrylate, t-octyl acrylate, ethyl methacrylate 1, propyl methacrylate 1
/-1., 1so-propyl methacrylate, butyl methacrylate, octyl methacrylate, and the like.

When the monomer represented by the general formula [11] is combined with the monomers [r] and Cff1, it has the effect of stabilizing the synthesis and stabilizing the subbing performance. This [river]
If the amount of the monomer is too small, the mechanical stability of the synthesis solution and the subbing layer will be poor, and if it is too large, the transparency of the subbing layer will be poor. Therefore, the preferable ratio of CH3 mono-11' is 10
~70 wt%, especially good IL, <Vizo~50 w
t%.

Preferred combinations of monomers for each of the above components include 2-hydroquinether methacrylate-butyl acrylate-
L-butyl acrylate, 2-hydroquine enal acrylate)-4fruac')le-1-1so-buna acrylate, 2-hydroxyethyl methacrylate-butyl acrylate-5ec-butel acrylate, 2-hydroquine ethyl methacrylate -Funal acrylate-
Butyl methacrylate, 2-hydroxyether methacrylate-butyl acrylate globil methacrylate, 2-hydroxyethyl methacrylate-propyl acrylate-1-butyl acrylate, 2-hydroxypropyl methacrylate-binal acrylate h-t-binal acrylate, 2- Hydroxyglopyl methacrylatebutyl acrylate methacrylate, 2-
Hydroxy/ether acrylate - bunal acrylate -
Examples include t-butyl acrylate-1.

The copolymer used in the present invention is composed of the above-mentioned three component monomers (sA'M), but a small amount of other monomers may be added to the copolymer composition within a range that does not impair the purpose of the present invention. You can also include it.

The copolymer used in the present invention can be synthesized by a known emulsion polymerization method. 1. When emulsion copolymerizing these monomers, it is advantageous to use a surfactant for emulsion polymerization. For example, polyvinyl alcohol, 0++ fractionated vinyl acetate, polyethylene oxide, polyethylene oxide rust conductor, human 90x ether cellulose, methyl cellulose, Sf L/maleic acid type 1
Coalescence: Protective colloids such as vinyl acetate maleley 41 co-IJL co-polymerization, methyl vinyl nylon 5-/l/-7L/inic acid co-polymerization, dodenrutrimethelammonium chlorite', tetrazofludimethylbenzyl ammonium chloride, dotecylin quinoli Cationic surfactants such as sodium bromide, anionic surfactants such as sodium lauryl sulfate, sodium dodecylbenzene sulfate, and sodium dodecylbenzenecarboxylate are advantageously used, and nonionic surfactants are also required. It may be added depending on the situation.

Further, as a polymerization initiator, organic or inorganic peroxides or persalts, such as acetyl peroxide, benzoyl peroxide, benzoylacetyl peroxide, lauryl peroxide, hydrogen peroxide, persodates,
Persulfates and perborates can be used.

In addition, inorganic oxygen-containing oxidizing sulfur compounds such as sulfur dioxide, sodium sulfate, sodium sulfite, sodium metasulfite, ammonium sulfite, and water-soluble aliphatic tertiary amines such as triethanolamine and jetanolamine etc. can also be used.

The copolymer of the present invention is dispersed as fine particles in an aqueous dispersion medium and used as a combined aqueous composition in a subbing liquid. Note that, depending on the purpose, a part of the water may be replaced with an organic solvent that is miscible with water (for example, methanol is acetate). [Emulsification] The copolymer of the present invention obtained by the k method can be used as an aqueous dispersion of emulsion polymer of imitative particles, so-called latex! ) can be done.

The co-11 aqueous composition (subbing i) containing the co-11 copolymer of the present invention varies depending on the purpose of use and the wrapping method. It is preferable to use an organic bath agent that can be mixed with the copolymer so that the solid content concentration of the copolymer is from 1 to 40 cents by weight.

The copolymer latex of the present invention obtained in this way (see below) contains the above-mentioned copolymer components (0.1 to 40 wt%) and contains the necessary Surfactant II, hydrophilic organic colloid, matting agent, r'
lJA,'ii) It may contain additives such as tl-protective agents, cross-linking agents, etc. Examples of crosslinking agents include so-called hardening agents for photographic gelatin, such as formaldehyde, altehyde compounds such as cryogyzal, mucochloric acid, natramecarene-1,4-bis(ethyleneurea), and heximethelene-1,6-bis. (Ethyleneurea) A compound with an ethyleneimine group, trimenalene [,
Methanesulfonic acid esters such as 3-biamethanesulfonic acid ester, active vinyl compounds such as bisac 1) roylurea, metaxolene vinyl sulfonic acid, 2-methoxy-4,6-dichlorotriazine, 2-ndyl urea, etc. Compounds having an active group such as 4,6-dichlorotriazine, compounds having an active group such as bisphenol glycol triazine, and in7anate can be used. -Among these, compounds having an ethyleneimine group, methanesulfonic acid esters, and compounds having an active halogen are particularly preferred.

The above liquid is applied to the VCl cloth on the polyester film. Here, polyester is a polyester whose main components are aromatic dibasic acid and glycol. Typical dibasic acids include terephthalic acid, inphthalic acid, p-β-
Oxy7ethynebenzoic acid, di7coninylsulfonecarboxylic acid, diphenoxyethanedicarboxylic acid, adipic acid, sebacic acid, acelaic acid, 5-sodium sulfoiphthalate, diphenylenedicarphone [,2,6-su7talene] There are dicarboxylic compounds, and the glycols include ethylene dalycol, phlopylene gelicol, )tanol, neopentelene glycol, a(, l, 4;, 1-cyclohexanediol, 114-cyclohexanemethanol, 1) , 4-bisoxyethoxybenzene, bisphenol A, diaryl, polyethylene glycol, and the like.

Among the polyesters made of these components, polyethylene terephthalate is the most convenient in terms of availability.

The polyester support used in the present invention may have a surface of polyester, and may be one in which polyester is supported on another support. , polycarbonate film, Bolibu O
Pyrene film or (-film coated with these polymers, glass plate, baryta paper, polyethylene laminate paper, resin-treated paper, synthetic paper, gold M plate, etc.),
Various translucent and opaque supports coated with polyester films may also be used.

There is no particular limit to the thickness of polyester, but it is approximately 12μ.
A diameter of approximately 500 μm, preferably 40 μm to 200 μm, is advantageous in terms of ease of handling and versatility.

In particular, biaxially stretched crystallized ones are stable! This is convenient from the point of view of 71i-te, etc.

It is preferable that the surface of the polyester film be subjected to various surface activation treatments to make it hydrophilic before the subtracting liquid is applied onto the all-polyester film. Examples of the surface activation treatment include oxidizing agent solution treatment as described in U.S. Pat. No. 2,943,937, etc., and U.S. Pat.
Ultraviolet absorption treatment as described in US Pat. No. 3,615,557, electric discharge treatment for corona discharge as described in US Pat. No. 3,615,557, British Patent No. 1.215.234.
Examples include active gas irradiation treatment as described in US Pat. No. 590,107, and flame treatment as described in US Pat.

The above subbing liquid is applied to the polyester film by a known method.
The coating will cause swelling. For example, the coating can be applied to the polyester film by curtain coating, lino-roll coating, fountain air doctor coating, slide spotter coating, extrusion coating, Naig cold cloth, etc. Here, the coating of the copolymer The amount is good, <r”0.o 1~
5 g/n, particularly preferably 0.03 to 2 g/n?
It is. Drying after coating the undercoat M can be performed by a known method.

For example, skewers can be made that perform drying such as hot air drying, infrared edge heat drying, heater roll drying, and microwave drying. In the present invention, it is preferable that V) and Z) be further coated on top of the undercoat layer. The upper layer may contain known natural hydrophilic organic colloids such as gelatin and casein, synthetic hydrophilic organic colloids, antistatic agents such as Ndensho 46-
24159-L'-, JP-A-48-93165, and Tokuden 11 (i'49-23828), it is possible to prepare an aqueous solution of the same hydrophilic molecule. The upper layer liquid may contain a matting agent, a hardening agent, a surfactant, etc. For coating and drying the upper layer liquid, any known method can be used in the same manner as for the four-layer processing. It is possible. Before wrapping or after drying the downstream liquid and the upper layer coating liquid provided according to the required VC, flame radiation treatment, plasma treatment, corona discharge treatment, glow discharge according to the required VC. Public treatment, Shiyu irradiation treatment, etc.
) Surface treatment may be performed.

In this way, the photographic support of the present invention provided with a subbing layer on at least -a(j) can be applied to at least one of the following methods: A sexual colloid layer can be coated.Specifically, various compositions for forming a photographic light-sensitive layer can be used, such as a /% silver chloride photographic emulsion, an azo photosensitive composition, or a gelatin composition containing a rayon inhibitor. It can be coated with a gelatin backing composition to adjust the curl balance of the material or support film, and the photographic resist obtained in this way has excellent adsorption properties and is suitable for photographic processing such as development. Even if this is done, the first layer of photographic film will not peel off from the support, and there will be no adverse effect on photographic performance.

The present invention will be explained in detail by way of specific examples, but the embodiment of m1 of the present invention is not limited thereby.

In addition, in the following, "department" means "department" unless otherwise specified.
Parts by weight.

First, a typical example of a method for producing a copolymer used in the present invention will be shown.

Synthesis Example (1) The copolymer was synthesized as follows. After I"0, water was poured into an open container placed on the cooling pipe, and after degassing, the above mixed material was charged, and emulsion polymerization was carried out at 80°C for 5 hours to obtain a dry solid content of 30 wt%. Get the resin.

For Synthesis Examples (2) to α1, a copolymer latex (resin cited below) having the composition described in the anonymous example was completely synthesized in the same manner as in Synthesis Example +11 above.

Next, we will explain the evaluation method used in the detailed examples.

(11 Adhesion Test - Dry Film Test) When a shallow scratch was made on the emulsion side 1 of the sample in the pattern of the substrate using a razor, and after pressing a seven-layer adhesive tape on top of the scratch, the tape was suddenly peeled off. The residual rate of the emulsion film relative to the adhesive area of the Seronone tape is expressed as a percentage.

<Processed film inspection test> In the processing bath, scratches were made on the emulsion surface of the sample in the shape of the substrate with a sharp end, and the scratches were rubbed and the residual rate of the emulsion film was expressed as a total percentage. In practice, there is no problem if this percentage is 80 or more.

(2) Transparency test Turbidity meter MODEL T-260OD manufactured by Tokyo Denshoku Co., Ltd.
The film support was measured using A and expressed as a percentage.

In practical terms, there is no problem if it is 1 or less.

(3) Mechanical stability test JISK 6 using a high-speed anal agitation tester manufactured by Uejima Seisakusho.
381, Latex M, 14,000 in all containers
i at rpm! The mixture was stirred with a spindle rotating at % speed, and the time until the formation of aggregates was expressed in minutes. Practical 30
There is no problem if it is more than a minute.

Example-1 30 W/n? Corona discharge treatment of min. Next, 10 ct of the resin quoted from the synthesis example fil, 20 ct of a surfactant having the following structural formula, 30 ct of hexamethylene 1/-1,6-bis(ethylene urea)
A subbing liquid consisting of 90 cc of pure water was applied to a film thickness of 20 μm (dried at -1100°C for 1 minute. Next, gelatin I
An upper layer coating solution consisting of 20 to 9 gb Zabonin and 100 cc of pure water was further applied to a thickness of 20 μm and dried at 100° C. for 1 minute. A backing layer for printing photosensitive material was provided on the subbed polyester film obtained by the above procedure. Next, as a comparative example, as shown in Table 1 below, only the subbing liquid copolymer was changed, and otherwise the subbing process and backing layer coating were performed in the same manner. The evaluation results for each sample were as shown in Table 1.

The following margin comparison synthesis example fil is based on the synthesis example fi+ of JP-A-51-123139. Comparative synthesis example (2) is based on synthesis example (5) of JP-A-49-113868.

As is clear from Table 1, the invention example (1) is excellent in all four evaluated items. In addition, in Comparative Example fil, there was no improvement in film adhesion when no upper layer was provided.

Example-2 A subbing layer polyester film was prepared in the same manner as in Example-1 except that the copolymer latex (resin cited below) shown in Table 2 was used, and a photosensitive printing layer was applied on this subbing layer. A photographic photosensitive layer for the material was applied. In addition, comparison was made with a sample prepared from a comparative compound in the same manner as in Example-1. Each evaluation result was energized as shown in Table 2.

The following margin comparison synthesis example (3) is based on the paint m1 of the example of JP-A-46-19879.

Comparative Example (3) had poor treatment film adhesion and could not be evaluated for printing performance. In contrast, Examples (2) and (3) of the present invention had no adverse effect on photographic performance.

As is clear from Table 2, the invention examples (2+, (3
) was found to be excellent in all four evaluated items.

Example As shown in Table 3, a polyester film for undercoat layer was prepared in the same manner as in Example 1 except for the copolymer latex (resin cited below) used, and a polyester film for color cut film was prepared on the undercoat layer. A backing layer fc was applied. However, the resins cited below were stored at 23°C for 2 days and 3 weeks (21 days) after synthesis. The results of each evaluation were as shown in Table 3.

Below is a margin comparison example (4) &J, shaved 1 no; q11 52-19786
Based on the copolymer used in Example (21) of the publication.

From Table 3, it can be seen that Example (4) of the present invention exhibits no deterioration over time and is excellent in all four evaluated items.

Example 4 Using the co-1R combined latex (resin cited below) shown in Table 4, a subbing layer polyester support was prepared in the same manner as in Example 1, and gravure was applied on the subbing layer. Backing WJxm of photosensitive material for printing was killed. Each evaluation result was the energization shown in Table 4.

As is clear from Table 4 below, it can be seen that all of Invention Examples (5) to OQ are excellent in all four evaluated items.

Example-5 Before applying the upper layer, 3
A subbing layer polyester film was prepared in the same manner as in Example 1 except that corona discharge treatment was performed at a treatment intensity of (l W/n? min), and a photosensitive material for gravure printing was coated on this subbing layer. A backing layer TM was installed.Each evaluation result is the 5th
The power was on at the front.

As is clear from Table 5 below, examples of the present invention (11) and (i2)
It can be seen that all of the four items evaluated are excellent. In particular, the present invention example +81 in the actual picture example-4, (9)
It can be seen that the treated film adhesion and dry film adhesion are further improved compared to the above.

Patent applicant: Konishiroku Photo Industry Co., Ltd. Agent: Nobuaki Sakaguchi (and 1 other person)

Claims (1)

[Scope of Claims] At least one surface of the polyester support has the following general formula [
13. A photographic support characterized by having a subbing layer obtained by coating an aqueous composition containing a copolymer consisting essentially of the monomers shown in [] and [11]. General formula [■] [r2C: CR2 C00RtOff [In the formula, R1 represents an alkylene group having 2 to 4 carbon atoms, and R2 represents a hydrogen atom or a methyl group] General formula [''] 112C= CE■ Ward0OR3 [Formula In the formula, R5 represents rM having 2 to 8 carbon atoms, a chain alkyl group.] General formula [Otori] ■(2C=C1'tq ■ 0OR5 [In the formula, RII represents a hydrogen atom or a methyl group. R5 is Straight chain mafr having 2 to 8 carbon atoms represents a branched alkyl group, but when Rq is a hydrogen atom, it is branched, and R
When 11 is a methyl group, it is linear. ]