SU551200A1 - Heat sensitive coating - Google Patents

Description

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The invention can be used: for the production of heat-sensitive material, in the field of computing and measuring equipment for recording and | thermal insulating sources, for example, pulsed heated semiconductors, as well as thermo-heaters.

Thermally sensitive coatings based on leukooosiovaniya thiazine dyes, acid-forming substances (substances that form an acid when heated, causing the formation of a dye) and polymeric binders are known. However, to prevent the formation of color, the color-forming components are either spread across the layers, or using complex microencapsulation technology, or an additional wet processing stage 1 and 2 is required to obtain the image. 3

The disadvantages of these materials are the complexity of their manufacturing technology or the need for additional processing prior to visual recording of information.

A heat-sensitive coating is also known, consisting of a polymer bond

th, leucosation of triarylmethane dyes, amides decomposed by heating with the formation of acid, and mineral flakes. Used as anti-impulsive additives. 3. The disadvantage of this material is the high temperature of its heating to obtain an image in excess of 100 C.

The closest analogue is a heat-sensitive white coating, in which; polymeric bonds (Pivinklbutrral, polyvinyl ethyl or polyvinyl alcohol), N-benzoyl-lumectomine blue dye, baneoyl peroxide forming an acid alkaline stabilizer H type NaOH-Na, NRO when heated. preventing the appearance of the veil :, the use of the last two components significantly reduces the thermal sensitivity of the coating and requires to obtain a color image of heating to a temperature e below 1O5 ° C. The disadvantages of this coating should also include the need to immediately apply a well-prepared blend solution to the substrate due to the stability of the coating.

of the benzoyl peroxide, which causes the solution to color, which complicates the process of material preparation.

The aim of the invention is to improve the heat-sensitive coating, i.e. increase its heat sensitivity,

This is achieved by the fact that the coating, as an acid-forming substance, contains an aluminum content, and, as a countervailing additive, 1.2 -piamine-evolve at a blindness ratio of the components, by weight. 4.J

Popular svoyuyushey5,, 5

N "benaevlemekmetil noviligoluboj krasvitep 0,2" 2, O

Aluminum nitrate 0.2-4.0

1,2 - Diaminobe zol0.05-O, O6

The thermosensitive coating is prepared by ttolly dissolving the above substances in ethyl alcohol and ethyl acetate mixtures at a volume ratio of 1: 1, applying a nonvaoM layer on a substrate (glass, polystyrene, polyacrylate, triacetate, paper) and drying at 2 ° –4 ° C for 1 hour. The resulting toltzine layer does not exceed 25 microns. The solution can be stored until. watering on the base or until the base has been prodded for 10–20 days.

The invention. Is footed, given in the table .. I

Table

The recording of images on dry heat-sensitive materials according to examples 1-7 is carried out entirely with a tetsha capable of keeping the temperature below. ,

The tables show that the formation time at 7 ° C of a dark blue image, the apticcad density (.JD) of which at the maximum of the absorption band exceeded 1.5, is 1.20 minutes. When using an element of a digital printing device that provides a temperature of 1 L (hot (17 o C heating time, the time required to form a clear imprint on the proposed material is 13–16 m s).

When this material is stored at a temperature of 20–30 s, there is no voile sample during the OLD year.

The use of nitrate as an acid-forming substance and 1,2-dynaminobe ashes as an anti-inflammatory agent gives you the opportunity to get a better quality coating compared to the prototype, since the temperature at the case arises, the painted image decreases from 1O5 to 7O ° C The material obtained on the basis of the proposed coating increases in simplicity in the manufacture of JieHEfii since, because of this, the coating solution does not require an unwelded watering on the substrate or the base teapot.

x ans up to use 12-20 days.

Claims (3)

The use of a thermosensitive material with a medium coating also increases the speed of recording tformacvi and reduces the cost of its production. Invention Formula Heat Sensitive Coating. contains polymeric c & Zucldea, N -beceoyl leukemethylene blue dye, an acid-forming substance and an anti-imitative agents, which, because of an improvement in the quality of a heat-sensitive coating, contains aluminum nitrate as an acid-disinfecting agent, and 1,2-dihydrogen, as an acid-disintegrating agent, contains aluminum nitrate, 1,2-dihydrogen contains a nitrate, 1.2-di-dihydrogen, and contains an aluminum nitrate; barely blowing the ratio of components | weight parts; Polymer binder 5,0,5 C - bee-woven commemorative blue dye O, an2, p 00 O, -2-4, O Aluminum nitrate 0.05-0.06. 1,2-danaminobenzene Sources of information taken into account during the examination: 1. US patent I 3642487, CL 96-I5, 1972. 2. Japanese Patent No. 49-15227, l. 103 K 3, 1974. 3.Patent of Great Britain No. 1229215, l. (J 2 C, 1971.