DE1282445B - Two component heat developable diazotype material - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY Int. Cl .:

G03c

German class: C07c GERMAN ^ Vw PATENT OFFICE Number: 57 b -1/60 File number: 12o-6 EDITORIAL Registration date: 1282445 Display day: P 12 82 445.2-51 (E 27824) 1282445 September 22, 1964 November 7, 1968

The invention relates to a heat developable two-component diazotype material in which on at least one side of a layer support has a photosensitive layer applied through it contains an acid stabilized diazo compound and a coupler and on which a developer layer is applied, which is dispersed in a binder Contains heat developer.

It is known that a heat developer is applied in one to the photosensitive layer Coating is and that the photosensitive layer after its exposure to activate the Developer is heated.

The heat developer in question must meet the conditions listed below for the aforementioned purpose correspond:

He must not diffuse

it must be chemically neutral,

He must not have any _{extraordinary} intrinsic color in cold and warm state,

its activation must start within as narrow a temperature range as possible,

it must be odorless,

it allows the top of the diazotype material _a5

don't make it sticky,

it must not have any gloss after melting and subsequent cooling.

U.S. Patent 2,732,299 discloses a heat developable Two-component diazotype material described, the one in a special layer contains heat-generating compound. The heat-generating compound, for example urea, Methyl or ethyl urea is in this known material in a binder. With However, reproductions obtained with this heat developer have an unsightly coloration, moreover cannot be predicted with certainty, d. i.e., in many cases does not correspond to the expected color. In addition, comparative tests have shown that a urea compound containing a heat developer Diazotype material tends to undesirably "pre-develop" during storage, which this material discolours and thus becomes inferior or completely unusable.

The object of the invention is to provide a thermally developable two-component diazotype material which contains the developer in a special layer, in which the developers meet the above-mentioned conditions, reproductions can always be developed with the same amount of heat
Two component diazotype material

Applicant:

Establishments BAUCHET & CIE., Malmaison,

Seine-et-Oise (France)

Representative:

Dipl.-Ing. R. Müller-Borner

and Dipl.-Ing. H. H. Wey, patent attorneys,

10000 Berlin 33, Podbielskiallee 68

Named as inventor:

Andre Schaeffer,

Bernard Clauss, Rueil-Malmaison, Seine-et-Oise; Michel Laquerriere, Garches, Seine-et-Oise

(France)

Claimed priority:

France of September 24, 1963 (948 443)

Provides color shade and no "pre-development" if stored for a long time. shows.

To solve this problem, a heat-developable two-component diazotype material is assumed in which a photosensitive layer is applied to at least one side of a support, which contains a diazo compound stabilized by an acid and a coupler and to which a developer layer is applied, which is one in one binder dispersed heat developer contains and is characterized in that the thermal developer is a amino-saccharide whose melting point is 75 to 165 ⁰ C.

Amino-saccharide is the result of the incorporation of an amino group into the remainder of a saccharide molecule to understand compounds obtained by a known method.

The effect of these compounds as developers is explained by their diffusion by heating the Fusing or softening caused by diazotype material into the photosensitive layer. the The softening temperature can be lower than the melting point of the as a result of the action of the binder pure amino saccharide. The neutralization of the stabilizing acids of the photosensitive layer

809 630/989

the amino group of the developer increases the pH value and thereby causes the coupling.

Particularly suitable binders are polyvinyl formal, polyvinyl butyral, cellulose acetates and ethyl celluloses suitable. . ·

The amino saccharides mentioned below are particularly suitable as a heat generator:

Arabinamine, melting point ........ 98 ° C,

Chitosamine, melting point HO ⁰ C,

Glucamine, melting point 128 ° C,

Glucosylmethylamine,
Melting point 80 ° C,

1-aminotrioxymethyhnethane, melting point. 164 ° C,

Mannamine, melting point ......... 139 ° C,

Galactamine, melting point ........ 136 ° C,

Rhamnasylmethylamine (1 CH ₃ OH), _v melting point ...... ....... 127 ° C, -

Rhamnasylethylamine (1 H ₂ O), melting point .... .......... 141 ° C,

Arabinylmethylamine (2 H ₂ O), m.p. · ■ '..-. ... \ .101 ⁰ C,

Furosynethylamine, melting point 125 ° C.

To produce the two-component diazotype materials according to the invention, the developer is preferably ground to a grain size of less than 10 μ, whereupon the powdery. Product is combined with a binding organic solvent to form a suspension and then 'sion the dispersants thus obtained ^r. adjusted to a viscosity suitable for the coating process used and to the sensitive one. A layer of diazotype paper of the kind used to obtain a blue color, for example, when developing with ammonia ". T _;

Suitable organic solvents are in particular aromatic hydrocarbons, benzene and toluene, and _ cited as aliphatic chloriertef'Kohlenwasserstoff methylene chloride '* ^v:

Per square meter treated area ' expediently 2 to 8 g of developer applied.

-.,.; ■ Example JL ■ · -

• 'The developer, consists of ground glucamine. (Melting point 128 ° C). -. '"' ^: " ■ · ■ 100 g of this powdery substance are combined with 1000 ecm of toluene, in which 50 g of ethyl cellulose with medium viscosity are dissolved, to form a suspension.

The resulting suspension is then applied to the photosensitive in the form of an additional coating Layer of a diazotype paper which turns blue when ammonia develops. The development of the obtained diazotype material ίο at about 140 ° C gives a blue color.

Example 2

Chitosamine (melting point 110 ° C.) is used in the same way. It is now obtained at 125.degree a blue color.

Example 3

Furosylmethylamine (decomposition point 125 ° C.) is used in the same way _. receives a blue color at 120 ⁰ C. -, ■. · ■ Λ

Example '4

1-Amino trioxymethyl methane is also used (Melting point 164 ° C). A blue coloration is obtained at 145 ° C V

Claims (3)

Claims: ". 1. Heat developable two-component ^ diazotype material, in the case of which on at least one side of a layer support., a light-sensitive Layer worn on is, - what a weep through Acid stabilized diazo compound. and one Contains coupler and on which a developer layer is applied, which one in a binder dispersing heat developer contains, thereby g e k e hn ζ e i c "h η e t that the heat developer is an amino saccharide, the melting point of which is between 75 and 165 ° C. - '■ · ■■■> 2. Diazotype material according to claim 1, characterized in that the binder consists of polyvinyl formal, ■ Polyvinylbutyräiy ^ cellulose acetate or ethyl cellulose. · - '; ■ - "-"^-::' 3. Verf ahren.zur 'production-a diazotype material according to claim 1 ^; lind 2, characterized in that the binding agent is dissolved in an organic solvent before application to the substrate, -in.: dem- "the constituents of the sensitive layer and the heat developer are not soluble." * _{; -;} ■. ..... 'ϊη Selected scripts: U.S. Patent No. 2,732299. 809 630/989 10.68 © Bundesdruckerei Berlin