SU576074A3 - Method of applying undercoating to photographic film - Google Patents

Description

(54) METHOD OF APPLICATION SOUND ON PHOTOGRAPHIC FILM

I

The invention relates to a method for applying a sublayer to a photographic film of a shepherd for adhering it to a photographic gelatin emulsion.

Methods are known for applying a sublayer to a photographic polyester film by treating the surface of the film with a substance that causes it to swell, such as halogenated fatty acids (trichloroacetic acid), ketones (acetophenone, benzophene), alcohols (phenol, resorcinol, naphthol), followed by application a cellulose triacetate layer; a cellulose tritacetate sublayer containing gelatin; and a silver sulfate gelatin emulsion layer.

A photographic gelatin emulsion is not firmly bonded with a polyester film when the film is not pretreated with a substance that causes the latter to swell or dissolve. This is due to the fact that the polyester film is crystalline and highly hydrophobic.

However, when a substance is applied to the polyester film, swelling or dissolving. film, in the form of a coating layer

the smooth and smooth surface of the substrate is damaged.

In addition, the substance that swells or dissolves the film cannot be completely removed not only after drying the composition for applying the sublayer, but also after applying and drying the photographic gelatin emulsion.

During processing, the substance that causes the swelling or dissolution of the polyester film evaporates, which impairs the working conditions.

The purpose of the invention is to improve the adherence of a photographic gelatin emulsion with a polyester-film as achieved by the fact that one

The polyester films are electronically bombarded so that the contact angle between the film and water is less than 58 °, and a composition containing a copolymer latex is applied onto the treated surface

a base of a diolefin and an unsaturated ethyl monomer; and a compound having two or more ethyleneimino or methylsulfonyloxy groups.

If even one of the listed conditions is not met, the adhesion between the film from the complex

polyester coated with a sublayer and a photographic gelatin emulsion is completely insufficient for practical application. At the same time, satisfactory results cannot be obtained even by replacing electron bombardment with another type of treatment, for example, by UV irradiation with solvent. The polyester of which the film is made is obtained from an aliphatic diode and an aromatic dicarboxylic acid. A typical example of such a polyester is polyethylene terephthalate. Copolymer latex is obtained from diolefin and unsaturated ethylene monomer. Diolefins can be named butadiene, 2-chloroprene, isoprene, neoprec and 2, 3-methylbutadiene, and of unsaturated ethylene monomers, R-acrylates and R-methacrylates, where R is methyl, ethyl, propyl, butyl, chloroethyl, cyclohexyl, 2-ethylhexyl (acrylate only), glycidyl, phenyl, benzyl, phenylethyl, chloromethyl, 4-chlorobutyl, N, N-diethyl, sulfopropyl (methacrylate only), 2-ethoxyethyl, acrylate and methacrylamide, N-alkyl-carboxychromide (alkyl) , e-gal, propyl, butyl, amyl, and hecot), N, N-diPkyl acrylamides (alkyls are the same or different, methyl, ethyl, propyl, butyl, and amyl), N-phenyl, N- benzyl, N-phenethyl, N-methyl-, N-hydroxyethyl-, N, N-dioxyethyl-acyl; 1 amide; N-hydroxycarbonylmethyl acrylamide, N-hydroxycarbonyl ethyl acrylamide, M-hydroxycarbonylphenyl acrylamide; acrylonitrile, methacrylonitrile, a-chloroacrylonitrile, aryl- and alkyl-a-chloroacryl1b1 and a-chloromethacrylates (alkyl-methyl, ethyl, propyl, butyl, aryl-benzyl and cyclohexyl), acrolein, methacrolein, vinyl izina, aryl-benzyl, and cyclohexyl), acrolein, methacrolein, vinyl izi-aryl-benzyl, and cyclohexyl), acrolein, methacrolein, vinyl izi-aryl-benzyl, and cyclohexyl), acrolein, methylene, vinyl izoyl, aryl-benzyl, and cyclohexyl), acrolein, methycrolein, vinyl izryl, benzyl, aryl benzyl, and cyclohexyl; methstyrene, p-, m-, and o-chloromethylstyrene, vinyl methyl ether, vinyl acetate, vinyl acetate, vinyl propionate, vinyl chloroacetate, vinyl trichloroacetate, acrylic acid and methacrylic acid, itaconic acid, and acacidic anhydride; Anhydride, monoalkyl (aryl) esters of maleic and fumaric acid (alkyl-methyl, ethyl, propyl, amyl, hexyl, pentyl, octyl, aryl-benyl), and crotonic acid, which can be used alone or as a mixture. Copolymer latex usually contains 25-75% by weight of diolefin and 0.5-30% by weight of unsaturated ethylene monomer containing at least one reactive functional group at the ends of which at least one hydroxyl, formyl, carboxyl, one amide , alkoxy, isocyanato and ethylenimino group. Typical compounds {w containing two or more ethyleneimino and methylsulfonyl groups are given in table. 1. I l CO IHiCH2) nNHCON l H2 UHCON, H, CH2 H2CNg (CH2) „СОН l 1-10 КС02 (СН2 / gОС01 / ЧСНг (СН2), / g 1-4 Н2СНг: NS02- / 3-S02l} (u 2 Nhg / g hl / y-NT-C Tg - cf "f I NC CN W iPc W..CH2 F- / ik Cnr N CHz, -f - СН IfN СН2 / C-lf to NCH7 owa 4 Ich i Nf (I-NH (CH2) n3 "HC C (H / i JfN (Cng- (H2 CH2

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These compounds are introduced in an amount of 0.01-100, preferably 0.1% -30% by weight, based on the amount of copolymer latex.

Typically, this compound is dissolved in water, an organic solvent, or in a mixture of them, mixed with a copolymer latex, and used as a dispersion in water or an organic solvent containing water, such as methanol, ethanol, acetone. In the last case, the organic solvent is applied in a 0.1-10-fold amount relative to the amount of water.

For electron bombardment, a corona discharge apparatus or the like is used in which electrons fly out at high speed over at least between two electrodes in the presence of gas or in the presence of overpressure.

The electron bombardment was carried out so that the contact angle between the polyester film and water was less than 58 °.

After electron bombardment, a sublayer is applied to the treated surface and dried.

As a result of this treatment, the polyester film with the sublayer applied to it strongly adheres to the photographic gelatin emulsion even under harsh conditions.

Substances included in the sublayer do not adversely affect the photographic properties of the photographic gelatin emulsion.

Various additives can be added to the sublayer, for example a hardener to impart a photographic gelatin emulsion.

water resistance (formaldehyde, mikochlornrvata

acid, acrolein, glyoxal, divinylsulfonate 8

vinylsulfone, dichlorotriazine, hexahydro - 1, 3, 5 -triacryloyl - z - triazine, dioxybenzene, methylene - bis - acrylamide, dicarboxylic acid complex, dicarboxylic acid complex, dichloromethyl ester of dicarboxylic acid, derived from carbodic acid, derivative of carbodic acid, derivative of dichloromethyl dicarboxylic ester, derivative of carbodiic acid, derivative of carbodic acid, derivative of dichloromethyl dicarboxylic ester, derivative of carbodiic acid, derivative of carbodic acid, derivative of dichloromethyl dicarboxylic ester, derivative of carbodic acid, derivative of carbodic acid, derivative of dichloromethyl dicarboxylic ester, derivative of carbodiic acid, derivative of carbodic acid, derivative of dicarboxylic acid, derivative of carbodic acid, derivative of carbodic acid, derivative of carbide, dicarboxylic acid ester, derivative of carbodic acid; surfactant to improve

latex dispersion (natural saponin, synthetic anionic or non-ionic surfactants), substances that contribute to the formation of a matte surface (colloidal silicic acid, titanium oxide,

zinc, aluminum, polymethyl methacrylate or polystyrene in the form of granules or powdered starch), a dye or pigment to prevent the formation of a halo (spreading a bright spot on the negative) and staining the base of the film.

Example. Polyethylene terephthalate films stretched in mutually perpendicular directions are bombarded with electrons (corona discharge, Lepel HFSG model 2 apparatus), the treated film surface is painted

composition containing 6 g of the product Polylak SL - 204, 30 R.-sh water and 70 ml of methanol, and dried at 120 ° C B for 1 min. The formed underlayer is coated with a photographic emulsion; 1ithographic type containing chlorobromide

silver, and they stand out. In each case, the bond strength with the film is determined. The results are shown in Table. one.

To determine the dry film strength of a photographic emulsion surface

they scratch the razor blade so that the drawn squares form, press the sticky cellophane tape to the surface with a finger and quickly tear it away. The ratio of the surface area of the emulsion remaining on the film to the surface area of the adhesive tape is determined (in percent).

To determine the adhesion strength of a wet film in a bath, the surface is treated

photographic emulsion is scratched with a sharp tip of the gimlet so that squares are formed, and then erased. The ratio of the surface area of the emulsion remaining on the film to the total surface area of the emulsion is determined (in percent).

As can be seen from the above data, it is good to link with a photographic emulsion of a lithographic type.

Example 2. A polyethylene terephthalate film stretched in mutually perpendicular directions is bombarded with electrons (corona discharge, power of 325 W, current 0.04 a); as in example 1. The treated surface of the film is coated with a composition containing 8 g of product, Polylak SL-204, 90 ml of water and 10 ml of methanol, dried at 110 ° C for I min, additionally coated with x-ray emulsion containing silver iodbromide, and dried .

The presence of trimethylene dimethanesulfonate in the composition to form

Crown bit

Shaping p-chlorophenol

The same Thus, the sublayer applied by the proposed method adheres well to the Ryuntgen emulsion. When processing the film with a solvent, unsatisfactory results are obtained. For the sample, on which the sublayer, not containing trimethylene dimethanesulfonate, was applied by the proposed method, the adhesion strength of the dry film was 100%, and that of the wet film 60%. .

For comparison, the polyethylene terephthalate film stretched in mutually perpendicular directions is pretreated with a methanol solution of p-chlorophenol, dried at 80 ° C for 2 minutes, and divided into two equal parts.

One part is coated with the above composition to form a sublayer, and the other with the same composition, but without trimethylene dimethanesulfonate. An x-ray emulsion (see above) is applied to the treated surface of the films and dried.

For the prepared samples, the adhesion strength with the film is determined as in Example 1.

The results are shown in Table. 2

table 2

Adhesion strength,%, of the film

wet

dry base

100 60

100

20 20

Example 3. Polyethylene terephthalate films stretched in perpendicular directions are bombarded with electrons (corona discharge, power 125 W, current 0.35 a), as in Example 1. An underlayer is applied to the treated surface (see Table 3). . dried at 120 ° C for 1 min, covered with a second gelatinous underlayer containing absorption dyes that prevent the formation of a halo, and dried. The results of the experiments are given in table. 3

The composition of the sublayer

title

Haikar 2S70X 5 Compound N 1

Kroslen 2 M-38 Compound N 2

Haikar 2570 S

Kroslen 2 M-38 Glyoxal

W. lowered (modified

Acid Acid Acid Acid Copolymer, Daido Kaogn Co.) Compound No. 1

Nikasol A-20 (such as acrylic acid, which forms self-reticular structures, tours, Nippon Carbide K Mycochloric Acid

EXAMPLE 5. The polyethylene terephthalate film, stretched in mutually perpendicular directions, is bombarded with electrons, as in Example 2, is coated with a sublayer on both sides, coated on one side with a methanol solution of 0.5 g of sodium salt of the product of copolymerization of taurine semi-amide ( aminoethanesulfonic acid, 1: 1), starol and maleic anhydride, and on the other X-ray emulsion and dried. The sample shows excellent adhesion between schenka and emulsion. No static charges were observed / DSTs. The marks formed by the electrostatic charge do not occur at all.

Table 3

Adhesion rate,%, of the film

wet

quantity,

100

100

7.0 0.2

10.0 1.0

100 20

100 100

7.0

10.0

100 0.2

5.0

100, 0.15

5.0

40 0.3

Claims (1)

Claims The method of applying a sublayer to a photographic film of C. TEG polyester for bonding it with a photographic gelatin emulsion, is one that, in order to improve the adhesion of the photographic gelatin emulsion with a film from a complex polyester, one the side of the film is electronically bombarded in such a way that the contact angle between the film and water is less than 58 °, and a composition containing a copolymer latex based on a modulation to an unsaturated ethylene layer is applied to the treated surface an onomer and a compound having two and:; and more zylenimino- or methylsulfoxy groups.