SU756344A1 - Electrophotographic material - Google Patents

Description

The invention relates to a material for electrophotography llamas, which can be used for the manufacture of printing forms and printed wiring electrophotographic method without transfer.

Known electrophotographic material, consisting of poly-M-vinylcarbazole and sensitizer2,4, 7-trinitrofluorenone and Shch.

The spectral sensitivity range of this material with a content of 10-50% sensitizer reaches 650 nm.

The purpose of this invention is to expand the spectral sensitivity region of an electrophotographic material. ,

The goal is achieved by using a 2,6-diphenip-4 £ 2, 2-diphenylbenzo- (δ) -cyclopete perchlorate as a sensitizer in a known material, consisting of poly-Ν -vinylcarbazole and a sensitizer. ЗЗ pyrily or double perchlorate 2,6-diphenyl-4- £ ΐ- (Η) -.

1,2-diphenylbenzo- (6) -cyclopenta- (e) pyranio-3] pyrily in an amount of 0.1-1 wt.% Based on the weight of the layer.

The formulas of these compounds are as follows.

The proposed material allows

, 5 to expand the range of spectral sensitivity to 800 nm.

Example 1. 0.99 g PVC (TU 6-09-06-112-72) (99%) is dissolved in

10 ml of toluene and 0.01 g of perchlorate

20 2,6-di-phenyl-41,2-diphen and l-benzo (6) -cyclopenta- (e) -pyranio-3] pyrily (1%) are dissolved in 2 ml of acetone. The solutions are mixed. The resulting solution is black and green water

25 per aluminum plate size

20x20 mm and dried in a vacuum oven at 50 ° C. A layer of 5–7 µm thick is charged up to 200 V with a negative corona discharge at a voltage of

3

756344

5 kV coronator; The exposure time of the initial potential when illuminated with a 150 W incandescent lamp is 400 lx · s. The dark half-time is 30 s, <

FIG. 1 shows the spectral characteristics of the sensitivity of the layers obtained; FIG. 2 - the same.

Example 2. 0.99 g of PVC (TU 6-09-06-112-72 (99.9%) are dissolved. In 10 ml of toluene and 0.001 g of perchlorate

2.6-diphenyl-4 {ί, 2-diphenylbenzo- (B) 'cyclopenta- ¹ · (e) -piranio-3 ^ pyrily

(0.1%) dissolved in 2 ml of acetone. Layers are prepared as described in example 1. Layers of 5-7 microns thick are charged up to 800 V by a negative corona discharge at a voltage on the coronator of 5 kV. The exposure of the half-potential of the initial potential when illuminated with a 150 W incandescent lamp is 200 lx · s. The dark half-time is 100 s. "

Example 0.995 g of PVC (TU 6-09-06-112-72) (99.5%) are dissolved in

10 ml of toluene 0.005 g perchlorate

2.6-diphenyl-μ, 2-diphenylbenzo- (B) cyclopenta- (e) -piranio-z! - pyrillium (0.5%) is dissolved in 2 ml of acetone. Prepare a layer as described in example 1. Layers with a thickness of 5-7 μm are charged to 500 V by a negative corona discharge at a voltage of

'on the coronator 5 kV. The exposure of the half-time of the initial potential when illuminated with a 150 W incandescent lamp is 1000 lx-s.

The dark half-time is 100 s.

ten

15

20

25

thirty

35

Example 4. 0.99 g of PVC (TU 6-09-06-112-72) (^ 9%) are dissolved in 10 ml of toluene and 0.01 g of 2,6-diphenyl-4- ΐΐ- double perchlorate (H ) -

1,2 — diphenylbenzo-(B) -cyclopenta (e) -pyranio-3] pyrily (1%) is dissolved in 1 ml of acetone. Layers are prepared as described in Example 1. Layers 5-7 µm thick are charged up to 200 V by a negative corona discharge at a voltage on the coronator of 5 kV. The exposure of the half-time of the initial potential when illuminated with a 150 W incandescent lamp is 500 lux ”s. The dark half-time is 100 s.

Claims (1)

Claim An electrophotographic material consisting of a substrate and a layer of polymeric organic photoconductor poly-M-vinylcarbazole with a sensitizer, characterized in that, in order to expand the spectral photosensitivity region, 2,6-diphenyl-4- £ ΐ, 2-diphenylbenzo perchlorate is used as a sensitizer - (B) -cyclopenta- (e) -pyranyo-31 pyrillium or 2,6-diphenyl-4- ^ Ι- (Η) -1,2-diphenylbenzo- (th) -cyclopent- (e) -pyranio double perchlorate -3-) pyrily in an amount of 0.1-1 wt.% By weight of the layer.