DE2061523A1 - Light-sensitive, vesicular materials with improved binders - Google Patents

Description

Photosensitive, vesicular materials with improved binders

The invention relates to photosensitive, vesicular image-forming compositions which contain a sensitizer which is used in the Irradiation releases a gas, and a binder from the group of copolymers of a-alkyl acrylonitriles with a different vinyl monomers and intimate mixtures of these Copolymers with organic materials that are compatible with the copolymers contain. The mass is called thin PiIm mounted, carefully dried and can be conditioned by treatment with hot water or on other catfish subjected to prior nucleation treatment to be an educational medium of superior qualities to obtain. After irradiating this

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new hates with a nur.ber from actinic Ltrai ά & ε released gas in the selected areas can be developed into a visible record by overall heating.

The invention is concerned with a record-providing Material used to form the recording only in the form of a distribution pattern of radiation-scattering continuities, which are formed within a thermoplastic, hydrophobic Filraes, is capable of being a photo-decomposable solid agent practically uniform ii. a polymer binder is distributed, and calibrate that Agents decompose into products when exposed to light, which are only volatile when heated and the otrahiungsverfalldiscontinuitti only in * those of the light form hit surfaces of the polymer and thereby result in this record.

Vesicular images are formed in these materials by small vesicles or bubbles of gas that scatter light and that are formed and trapped in the areas of the film that have been exposed to actinic light. The film generally has a colloidal or resinous coating on a support material and a photosensitive agent, generally a diazo compound, which is dispersed within the coating. If the "film" is exposed to actinic light, the sensitizer releases gas molecules. The rheology of the coating is such that the vesicles do not form immediately because the hard copy systems are less preferred than latent image systems and because the latent images can be reverse rejuvenated in the manner given below. The released gas forms bubbles when the film is heated, preferably to temperatures between 90 and 170 ° C, presumably because the carrier is sufficient is relaxed when heated, so that it "I * ■ '". ·., "' ■ '■ di ^ Gaekeriie ^ Tcpandieren. Die ertl tenon hL ^; i? -chen

^ - ·: ''. '. "^; : ■■ · .- 109033/1746

make the carrier material opaque to the passage of light in the exposed areas, but also callify, so that if the coating was formed on an opaque base, the image appears white, usually the print obtained is a whole - subjected to light in order to prevent a possible, undesirable formation of bubbles in the clear surfaces during the subsequent simultaneous exposure to heat and light, for example in a projector.

The exposure and development of these vesicular image-forming materials results in a positive copy from a negative or a negative copy from a positive. A reverse development to form a negative from a negative is described in the publication "Direct Image in Vesicular Photography" in Photographic Science and Engineering, Volume 10, (1), page J (1966). The latent image is diffused out of the ji'ilin, which is then exposed to actinic light and developed. Since the transparency in this process gives a faithful reproduction of the original, the parts of the copy that were imagewise exposed remain clear and the initially unexposed parts are developed so that they become opaque. A particularly simple and very effective method of reversal development for the present case is described in US Pat. No. 5,457 , where the usual three-dimensional formation is followed as soon as desired by an overall design of a discharge tube.

Gelatin was considered the first to be vesicular materials carrier used (German Patent 559 795) · This showed the- difficulty * that the preserved vesicular Fade pictures ranch. Although the gelatin is a low one Permeability for the gas bubbles has what is desired, it is overly sensitive to water vapor. The gelatin

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Carriers absorb moisture from the atmosphere and become soft, so that the vesicles collapse and the image is destroyed. Improvements to this process • are described in US Pat. No. 2,703,756, in which the sensitizer-containing colloid is encapsulated in a hydrophobic resin, e.g. of U.S. Patent 2,699,392 initially applied the * layer is hydrophobic and without a sensitizer, but to form a hydrophilic surface and. for absorption a sensitizer is treated from an aqueous solution. Ls occur, albeit to a lesser extent, the same Disadvantages of high solvent retention. In this case, moisture absorption and poor image stability arise.

With a further improvement according to the US patent 3 0J2 414 the hydrophilic polymer was completely through replaced a hydrophobic polymer and this was achieved by making a polymer and the sensitizer together the same organic solvent or from a "mixture of compatible solvents", such as butanone and Acetoriitrii, were raised. The criteria that determine the choice of the hydrophobic polymer are very narrow and critical. Without being limited to the following considerations, the criteria include a very low permeability, a high rigidity under ambient conditions, a favorable temperature at which the polymer is sufficient to flow to enable the formation of bubbles, however the gas permeability is not yet excessively high, good solubility, good pilming properties, good Adhesion to inert substrates and good bonding in the event of high levels of lion ingress of the sensitizer.

IonomeTes vinylidene chloride was found to be essential in the search for a useful binder (DAS 1 '· 55,329, US Patent 3,032,414). Even if ec cannot be used directly from calibration, in particular due to the kriutnl-

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As a kind of polymer which does not allow sufficient solubility, it exhibits numerous, approximate properties, so that it excels as the parent material of a family of binders, each of which has certain advantages in specific applications. Some of these binders have been obtained by introducing comonomers of various types and in various amounts and by combining copolymerization and blending with different but compatible polymers. Obviously the most successful binder to date consists of such a combination in which vinylidene chloride is copolymerized with acrylonitrile, the copolymer being referred to as saran and mixed with polymethyl methacrylate. However, this binder represents a compromise of the desired properties, in which the achievable image density is significantly reduced by the methacrylate polymer, while the stiffness of the carrier is much improved compared to Saran, but is not sufficient to produce the image even at rather moderate temperatures, such as 80 ⁰ C to keep intact. Furthermore, vinylidene chloride is quite dangerous and has a tendency to form peroxides and phosgene on contact with air, resulting in mixtures which can explode on heating. In the copolymers too, the vinylidene chloride is unstable and tends to form free hydrogen chloride even under normal ambient conditions, so that corrosion of the microfilm viewer or of the printing components with which the vesicular films are usually used occurs occurs.

According to the invention, the above-mentioned disadvantages of the previous methods are overcome by a new Group of binders with superior quality is used, consisting of copolymers of a-Alkylacrylnitrllen with different Viny! Monomeric and intimate mixtures of these copolymers

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mers exist with organic, film-forming materials that are compatible with this and are visually practically clear Films made with these copolymers result.

These new binders are harmless and vesicular or Bubble-forming materials based on these binders give good quality images that can / completely without further treatment stable at 80 ° c /. Record-providing Materials of this new type are much more stable than photosensitive film or paper as well as a finally preserved pictorial form. There were no signs of corrosion when using the materials observed according to the invention and compared with materials based on binders that differ from vinylidene chloride derive, a surprising and very favorable whiteness occurs from the new vesicular materials prints obtained on indicating the lack of chemical interactions between the new binders and the diazonium salts which are the preferred sensitizers.

The copolymers which can be used in the context of the invention are known per se, for which reference is made to US patents 2,486,241, 2,436,926; 2,576,076; 2,652,391; and British Patent 586,796. Their usefulness and theirs excellent properties for the vesicular procedure however not known so far.

The copolymerizations can generally be carried out in solution, in emulsion or in suspension generally carried out with the use of catalysts and heat, such details not being part of the Make up invention. Mixing can be done in a common solvent if appropriate, or can be effected by mixing solutions in compatible solvents will.

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The copolymers of α-substituted acrylonitrile, in particular the copolymers of methacrylonitrile, α-ethylacrylonitrile and α-isopropylacrylonitrile, are very satisfactory carriers for developing vesicular images of good quality which are completely stable ^{at 80 ° C. without further treatment.} Further advantages result from the fact that the properties of the polymer can be modified considerably by .Copolymerisation and mixing, so that a family of carriers is obtained for optimal behavior in specific applications, for example in the conventional or the present reverse access process or in hard copy recording materials . In addition to the superiority of the individual copolymers of this group and the multitude of sensitometric properties that they offer together, they are particularly valuable for processes that are used to ensure a regulated tone gradation through formation of a pronucleus. The processes of prenucleation are set forth in US Pat. No. 2,703,756 with particular reference to polyvinylidene chloride films. The preferred method is to expose to actinic radiation in an amount of about 5 # the amount required for effective imaging exposure after increasing to the processing temperature. The preferred heating was carried out for 11 seconds to obtain a Plättmangel at 60 to 90 ⁰ C, or by radiant heat or by direct steam, and further is made to literatures, wherein the development is carried out by contacting with water. The reference also describes that a substantial part of the

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Regulation of tone gradation can be achieved by heat alone can. Ls was «however now established that the success of this Heat treatment, especially when used by means of a contact with V / ater, depends on the type of binder even on the class of binders that is suitable Properties for vesicular imaging without nucleation are known. For example, the honopolymer loses of methacrylonitrile, which is known to hold a vesicular image, actually its ability to differentiate of the image areas from the non-image areas according to the pre-nucleation method, as can be seen from Example Xv

™ results. A copolymer of α-methacrylonitrile and methyline ethacrylate in the same way cannot be used in a form that has been pretreated for nucleation, although it is capable of that Keep image if no prior nucleation has taken place. Even if the method for modulating the tone range of the film by Wärine in accordance with normal practice is referred to as prenucleation the actual mechanism is not fully understood and is unlikely to be the same for any of the procedures. However decompose Both heat and light remove the diazo salt and supply the nitrogen for nucleation, so the concept of Frär.uklention to fulfill the previously known Saclijyerhalte

fe seems. A practically the same result is obtained by flashing obtained with light alone, albeit the effect in this one The case often disappears within a few hours, and as a result, this process should occur at the time of application take place.

The preferred polymers of the above group are the copolymers of methacrylonitrile, of α-ethyl acrylonitrile and of α-inopropyl acrylonitrile with a styrene monomer; / p and resulted in particularly octagonal pictorial properties calibrated with copolymers of methacrylonitrile with a monomer vo; 3 styrene type. Styrene type monomers include Styrene as such and aryl and a-substituted styrenes, we UhJ orstyrol, u-IJethylstyrol or Vi n.vl toluene.

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2081523

It was generally found that the proportion of comonomer Must exceed 5 Mo1 $ in order to achieve the desired tolerance between the development conditions and the removal of the pronucleation, and favorably exceeds it is generally not 60 mol # or the beneficial properties of the substituted acrylonitrile become significant decreased.

The higher sensitivity and the larger exposure area in the above copolymers according to the invention compared to the methacrylonitrile homopolymer is particular Surprising, since the comonomers as a class in homopolymerization Polymers result which are completely unsuitable as vesicular binders. It could not have any image density 10 parts by weight of the diazonium salt neither with polychlorostyrene can still be obtained with polystyrene.

It is completely unexpected that the copolymer will vesicular formation with higher sensitivity than it allows for anyone Homopolymers can be obtained. The unexpected nature of the result and the very large port step achieved will particularly clear when comparing the copolymers with a mixture of the homopolymers in the same ratio. In the latter case, the properties obtained are roughly between the properties of the respective homopolymers.

A particularly interesting binder according to the invention is from a copolymer of methacrylonitrile with acrylonitrile, the materials with a high sensitivity without Pronucleation or prenucleatlon results. However, these materials can also be used in addition to a pre-nucleation or

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be subjected to impregnation if desired. A very significant application for high sensitivity materials with no pronucleation is in working micrographs, v / o it is often favorable that a number of frames remain without a picture for later addition of information or to supplement or supplement. The initial image training is often used in a document camera, for example the Canon KJ? If the recording is total is heated, the sensitometry of a pre-nucleated film is generally affected. Lie delicate i'ilme without nucleation on the The basis of copolymers of methacrylonitrile are retained Temperature increases unaffected on the development temperature.

Particularly favorable results were obtained when the ratio of methacrylonitrile to acrylonitrile is between 1: 4 to 4: 1 and the ratio is most favorable a value of 2 to 1. The ratios given relate to the charge mass from which the polymer is manufactured. Acrylonitrile is known to have a lower level Ratio of reactivity as methacrylonitrile, so that in the initial stages of polymerization the Copolymers is somewhat poorer in acrylonitrile than the feed mass. However, the batch becomes richer in acrylonitrile as the polymerization proceeds and that The ratio of acrylonitrile entering the copolymer increases. The preparative polymerizations usually take place in high yield and the average composition of the copolymer corresponds approximately to the initial composition the loading street. The ones given here Compositions are average values and so far no disadvantages in their use have been compared for the use of practically homogeneous copolymers.

In general, it is possible to add relatively small amounts of a third ion polymer to the charging mixture for formation . . 108833/1746

of a terpolymer, and if the terpolymer consists practically of methacrylonitrile / acrylonitrile no adverse effects found so far. For example, a terpolymer with 62 parts of methacrylonitrile, 31 parts of acrylonitrile and 7 parts of α-methylstyrene in terms of the behavior is not significantly different compared to a. Copolymer with 66 parts methacrylonitrile and 33 parts of acrylonitrile.

The synergistic effect of the copolymerization is particularly surprising compared to the behavior of the mixtures. A binder, which virtually consists of polymethacrylonitrile, f may be mixed with polyacrylonitrile, wherein both polymers are present in dimethylformamide and together with a slide • λομΙiiuiHiU ?. be raised. However, the sensitometric properties obtained are practical, those obtained by the polymethacrylonitrile alone, and the coating properties are determined by the poor properties of the polyacrylonitrile. In contrast, the copolymer has good coating properties and sensitometric properties far superior to those of any homopolymer. The copolymers according to the invention can also be mixed with other organic, film-forming materials. Furthermore, in the case of special effects, * in particular for adaptation to unusual development conditions, there are advantages in mixing. Of these film-forming polymers, those that contribute valuable physical properties, in particular cellulose acetate, cellulose acetate butyrate, poly-ct-methylstyrene and polymethyl methacrylate, if their amounts are kept relatively low, generally up to a maximum of 50% by weight.

Butanone or dimethylformamide are generally beneficial solvents for the specified copolymers and mixtures. The sensitizer can then be added in one mill-type operation be or preferably

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by mixing in a compatible solution. Although the specific choice of the sensitizer for releasing gas upon irradiation is not an object of the invention, it has been found that those releasing nitrogen are particularly effective, including the diazonium salts, such as e.g. B. Dimethylaminobenzol-diazoniumchiorid, ^ -ilorpholinobenzol-diazoniumchlorid or Diethylaminobensol-diazoniumchlorid. The addition of acids to preserve the diazonium salts is known and acids such as citric acid or p-toluenesulfonic acid are not harmful to the materials according to the invention. Furthermore, the Za ^ is abe inert, light absorbing dyes possible ™ lent that increase Vesikularbildkontrast and result in only a slight increase in the background density.

The film support can be made of any suitable material. If the image-bearing recording is to be used as a slide, films made of biaxially oriented Polyethylene glycol terephthalate, for example the poly

Ά RE

esterniielinex, Mylar or Celenar, glass, polyethylene or polypropylene can be used directly while cellulose acetate films used x ^ ground if they are provided with an intermediate layer to prevent * the diffusion of the , Plasticizing from the base into the the vesicular

The image-bearing layer is coated, and polycarbonate films, W ■ ·· '' ■■ '* ■■■■ ß ■ ■ ^r ■

for example, Lexan, or oriented polystyrene films

weraön can be used in case they have an intermediate layer to prevent the attack on the basis by the im Have coating solvent used. Opaque support materials can be used if the image by heflektiön should be considered coil and should of darker color 'or black for maximum contrast with the ^ developed vesicles, which in the Heflektion appear white. Such materials include metal foil ©. " pigmented plastic film or paper.

Dr% fberzugel ^ saiig is generally on the carrier material * ^? 109833/1746

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applied after a gravure or reverse roll peel operation in sufficient quantity to result in a dried film deposit of between 2 and 100 microns. The drying time and temperature are adjusted so that the solvent is practically completely removed, but avoiding excessive thermal decomposition of the sensitizer and the tendency to form pinholes when the developing temperature is then used. The suitable temperatures are generally between 70 ⁰ C and 170 ⁰ G.

The following examples illustrate the manufacture of vesicular Recording materials and methods of use, although the invention is not limited to these specific embodiments.

example 1

A 20% solution of polymethacrylonitrile in butanone was mixed with a sufficient amount of a 10% solution of the dimethylaminobenzene-diazonium chloride-zinc chloride salt in butyrolactone so that a ratio of 10% of the diazonium salt on dry basis was obtained. A moist coating 0.1 mm thick was dried in a stream of air at a temperature rising ^{to 115 ° C. for 10 minutes.} The exposure through a step wedge for 80 seconds with a pressure tube Matsushita FL1OBA-37 and development at 120 ⁰ C gave a suspension threshold of 32 # of full intensity. The use of a Pränukleationsverfahrens, wherein the FiIm was heated in water at 80 ⁰ C and was flashed with 5 # full exposure yielded a haze which biläweisen during the subsequent exposure and development not be removed knew and when no difference between the image area »Ttnä the image areas could be determined.

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Example 2

95 g of methacrylonitrile were copolymerized with 5 g of methyl methacrylate by emulsification in 225 g of water, to which 0.1 g of potassium persulfate and 0.5 g of n-octyl and n-tetradecyl mercaptans each had been added, and the mixture was stirred at 77 ° C. until the conversion to the polymer reached 95%. The coagulation with methanol / aluminum sulfate was followed by filtration and drying at 75 ^° C. and the copolymer was treated like the above homopolymer according to Example 1. The prenucleation process gave a pale image with a limit detectable at 32 $> full intensity, but this was overlaid with an unacceptable overall haze with a density of 0.32.

Example 3

66 g of freshly distilled methacrylonitrile were mixed with 33 g of ortho / para-monochlorostyrene and emulsified with 300 g of water using 3 g of sodium dodecyl sulfate and dissolving 1 g of ammonium persulfate, 2 g of sodium metabisulfite and 0.7 g of sodium pyrophosphate. It was stirred for 12 hours at 61 ⁰ C and then the emulsion broken with aluminum sulfate and filtered and the polymer dried in a stream of air at 70 ⁰ C, with a yield of 70? £ was obtained. The copolymer was drawn up, dried, ^{subjected to prior nucleation at 80 °} C., exposed and developed. The image had good density on a clear, haze-free background and had an excellent exposure area with sensitivity as low as 8 % of the incident intensity.

Example 4

70 g of methacrylonitrile were mixed with 30 g of α-methylstyrene according to copolymerized according to the method of Example 3, but the

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Emulsion at 65 ⁰ C stirred. The aufzeichnungsliefernde material was prepared as in Example 1, but it proved possible to increase the Pränukleationstemperatür to 10O ⁰ C and 11 # to obtain an image with good tone range corresponding to the incident intensity from the Matsushitalampe.

Example 5

70 g of methacrylonitrile was copolymerized with 30 g of styrene according to the procedure of Example 3, but at 65 ^° C. The record-providing material was prepared as in Example 1, but the image showed good density on a clear background and the tone reproduction extended to less than (16 9 & full intensity.

Example 6

The methacrylonitrile / styrene copolymer of Example 5 was mixed with 17-6, on a dry weight basis, polymethyl methacrylate in butanone prior to the addition of the diazonium salt. The aufzeichnungsliefernde material was prepared in the foregoing manner, including Pränukleation at 8O ⁰ C. It, in turn, a clear background was obtained after development, and the tone reproduction extended to less than 22 # of the intensity value. It follows that polymethyl methacrylate can be used as a modifier, although it can not be satisfactorily used as Gomonomeres *.

Example 7

60 g of methacrylonitrile were mixed with 30 g vinyltoluene according However, at 65 ⁰ C, copolymerized with the procedure according to Example 3. The record-providing material was prepared as in Example 1, but the period of heating for prenucleation was varied from 0 to 30 seconds, increasing tonal ranges being obtained or the sensitivity progressing from an initial value of 60 # intensity down to 22 # intensity was increased.

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Example 8

The methacrylonitrile-chlorostyrene copolymer according to Example 3 was drawn up and dried as in Example 1 and exposed imagewise for the reverse development sequence. Following imagewise exposure, development for exactly 60 seconds interrupted at ambient conditions (22 ⁰ C), then developed wholly exposed and directly at 12O ⁰ C. A direct positive copy of the original was obtained which had the same density as the negative image of Example 3 and a clear background.

Example 9

70 g of acrylonitrile was copolymerized with 30 g of styrene in a suspension system obtained by stirring with 300 g of distilled water, to which 1 g of ammonium persulfate, 2 g of sodium metabisulfate, 0.6 g of gelatin and 0.75 g of sodium phosphate had been added, whereby the temperature was kept at 65 C for 12 hours. Precipitation in methanol, breaking up in a Waring mixer and drying in a vacuum oven at 50 ^° C. gave the acrylonitrile / styrene copolymer in a yield of $ 76. A 20% solution in dimethylformamide was obtained with a sufficient amount of a 10% solution of the dimethylaminobenzene-diazonium chloride-zinc chloride salt in butyrolactone to give a 10% ratio of the diazonium salt on a dry basis. A coating 0.1 mm thick when wet was dried in a stream of air at a temperature of 115 ° C. for 10 minutes. Exposure to ultraviolet light and application of the developing conditions did not result in vesicular density.

Example 10

60 g of acrylonitrile were copolymerized with 40 g of methacrylonitrile by stirring with 1500 g deionized, distilled water in a room kept at 40 ⁰ C resin kettle. 1.5 g ammonium

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Persulfate in 50 g of water was added first and then 0.75 g of sodium bisulfite in 50 g of water was added. It was Stirred for 3 hours and then a copolymer separated as in Example 9, a yield of 53 # being obtained. That The acrylonitrile / methacrylonitrile copolymer was drawn up together with the diazonium salt as in Example 9. The exposure with a pattern of ultraviolet rays, a vesicular image gave good density and tint range.

Example 11

40 g of acrylonitrile were mixed with 60 g of methacrylonitrile as in Example 10 copolymerized and drawn up in the same way as a vesicular image-forming layer.

Example 12

33 g of acrylonitrile would be combined with 66 g of methacrylonitrile as in example 10 cöpölyiäerisiert and as a vesicular image-forming layer raised.

Β. έ ί 4 ~ -ν ~ ί.> - 4-ί - ί &

33 g Polyäcr ^ inltfli ύΜ 6§ g iblyitiötMcryinitrii were mi-fceiiiäüäe-r MIs ⁵ Mii & i i & Üimi-ihyiförmämid with a concentration 'vbii ίο % bz &; i &% vlrliicfti; üM eiiiö sufficient for this ^ eiiiei ¹ 1ö $ igefi iöiüfi | dil iϊiöetίlyiäώinobenzöi - äiazoniumBälz € ίs atif iibcklribÜil güpllii-fe: A il f'eüöftten state 0.1 M l ili ili £ 8deilteriert iläoch feliieiiäe glartieÜ m

i> - -i-S-4 --- ü

Di§ ilmiS dSß fSiiilfiifiäifi iiiitjieieii hirgisteilen veöikdilflä iäälÄ liiii mim iüföfi idiiiizüni in litie MitSüiMiil- M8M-% 1 iÜfbft IiMn äiüflMgii diiiefiuani, (l

iit giäü Jfeöf V

_BADO R.G1NAL

The development was carried out at 12O ⁰ C for 1.2 seconds ^ and diffusion densities of Veslkularfilme were determined in the usual manner.

1Ö9833 / 1748

CD

Homopolymer i> yo acrylonitrile

α b o lie

product
after
example binder 10 Copolymer with
60% acrylonitrile σ
co 11 Copolymer with
40% acrylonitrile OO
OJ
co 12th Copolymer with
33% acrylonitrile / 17 13th Mixture with 33? Ό
Acrylonitrile

exposure

IGü / i,

50 ·; *

2 ^ 70

12th

0.23 0.16 0.14 0.07 0.02

0.35 0.29 0.16 0.13 0.08 C, 05 0.04

0.41 0.33 0.30 0.24 .0.15 0.05 0.04

0.40 0.32 0.28 0.24 0.21 0.14 0.12 0.09 0.06 0.04

0.26 0.21 0.16 0.10 0.05 0.03

As can be seen from the table, the synergistic combination of acrylonitrile and methacrylonitrile results in the copolymer a strongly increasing vesicular density and expansion of the reporting area or the jin sensitivity by one factor of more than 4 times, while these effects are not achievable by mixing the respective horopolymers are.

Of course, only specific examples have been given above brought for special execution forms, without the Lrfindung is limited to this.

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Claims (18)

Claims 1. Recording material or medium that makes a record merely in the form of a distribution pattern of radiation-scattering discontinuities that occur within a thermoplastic, hydrophobic film, provides, wherein a photo-decomposable, solid agent is practically uniformly diapered within a polymeric binder and this agent decomposes after exposure to light to products which are only volatile when heated and which s radiation-scattering discontinuities only in the areas struck by light in which polymer forms and thereby provides the record, characterized in that, that the polymeric component of the film consists of one of the practically water-insoluble polymers, namely Oopolymers of α-alkyl acrylonitriles with different Vinyl monomers and intimate mixtures of these copolymers with organic, film-forming materials, which are compatible with these copolymers and result in optically clear films with them. 2. Recording material according to claim 1, characterized in that the photo-decomposable solid agent consists of a diazo compound which supplies nitrogen on exposure to irradiation. 3. Recording material according to claim 1 or 2, characterized in that that the polymeric component consists practically of one of the specified copolymers in an intimate mixture with organic materials, the organic materials consisting of cellulose acetate, gellulose acetate butyrate, Poly-a-methylstyrene, polyvinylidene chloride-acrylonitrile copolymers and / or polymethyl methacrylate. 10 9 8 3 3/1746 2 Ö 6 * 52 3 4. Recording material according to claim 1 to 3, characterized in that the copolymers are present in an amount of more than 50 wt .- ^ and the organic material is present in an amount of less than 50 % . 5. Recording material according to claim 1 to 4, characterized in that that the different vinyl monomers from Styrene, yinyltoluene, α-methylstyrene oil, acrylonitrile and / or Methacrylonitrile is made. 6. Recording material according to claim 1 to 5 »characterized in that that the copolymer of a copolymer of an α-alkyl acrylonitrile with a comonomer of the styrene type consists. 7. Recording material according to claim 6, characterized in that that the α-alkyl acrylonitrile consists of methacrylonitrile. 8. Recording material according to claim 6 or 7, characterized in that the molar ratio of the a-alkyl acrylonitrile in the copolymer is between 40 $ and 95 Ί » . 9. Recording material according to claim 6 to 8, characterized in that that the styrene type copolymer of chlorostyrene consists. 10. Recording material according to claim 6 to 8, characterized in that that the styrene type comonomer consists of α-methyletyrene. 11. Recording material according to claim 6 to 8, characterized in that that the styrene type comonomer consists of vinyl toluene. 109833/1746 - ²³ - 20M523 12. Recording material according to claim 6 to 8, characterized in that the comonomer of the styrene type Styrene as such. 13. Recording material according to claim 1 to 5 _9, characterized in that the copolymer is ordered from a copolymer of methacrylonitrile and acrylonitrile. 14. Recording material according to claim 13, characterized in that that the copolymer has a ratio of methacrylonitrile to acrylonitrile of 1: 4 to 4: 1. 15 · Recording material according to claim 13 or 14, characterized characterized in that the copolymer has a methacrylonitrile to acrylonitrile ratio of about 2 to 1. 16. The material of claim 1 to 15 _t characterized in that it has been treated for imaging by a treatment with hot water and a short overall exposure to actinic light. 17. Recording material according to claim 1 to 15 _t characterized in that it has been treated for imaging by total flashes with actinic light having a value close to that of Vert, which would cause an overall mist formation. 18. A method for producing vesicular images, thereby characterized in that a photosensitive recording material or medium according to claims 1 to 17 with actinic Light is irradiated and then the record-providing material is irradiated to develop a vesicular image is heated. 109833/1746 BATH ORIGINAL