SU1420592A1 - Composition for making triacetate cellulose film as substrate for cine and photo materials - Google Patents

Abstract

The invention relates to compositions for the manufacture of cellulose triacetate films and can be used in the chemical and photographic industry. The invention improves the flatness of the films while: preserving the physicomechanical properties to 1.5-2.6 mm. To reduce the longitudinal film shrinkage to 0.18-0.36%, and transverse to 0.2-0.45% and reduce the viscosity of the composition to 25-32 s due to the use of a composition containing 72.3-100 wt.h to form films. cellulose triacetate with bound acetic acid content of 60.0-61.5% and polymerization degree of 250-300 wt.h., 53-159 methanol; 371-477 methylene chloride; 7.23-15.0 triphenyl phosphate; 2.81-10.2 octadiphenylphosphate sucrose and 2.81-10.2 wt.h. Levoglucosane diphenyl phosphate. 2 tab. "(L

Description

 The invention relates to compositions for the manufacture of cellulose triacetate films and can be used in the chemical and photographic industry.

 The purpose of the invention is to reduce the viscosity of the composition, increase the flatness (decrease curl) of the films while maintaining the physicomechanical properties and reducing shrinkage. ; The invention is illustrated by examples.

Example 1. A mixer equipped with a stirrer was charged with 72.3 mash. Of cellulose triacetate (TAC) with a content of bound acetic acid of 60%, MM 200,000, p 250, 7.23 mash. triphenylphosate ata, 2.81 mac. Octadi-f | sucrose phosphate and 10.2 May, h. diphenylphosphate: that of levoglucosane.

Then served 477 May, h. methylene zloride and 53 ma.h, methanol. After mixing, the solution is fed to filtration, where it is freed from mechanical impurities.

After deaeration and cooling to the temperature of the production room, the solution is applied to a solid grain.

0

five

0

five

the surface of the casting mold, where the evaporation of the solvents results in the formation of a triacetate-cellulose film from the reactor.

The thickness of the resulting film 130 - 140 microns.

Levoglucosane diphenylphosphate is prepared by acylation of levoglucosane with monochlorobiphenylphosphate.

To a solution of 4 g (0.025 mol) of levoglucosan, dried at 30 ml of pyridine, 21 g of monochlorophenyl phosphate is added with stirring without cooling, which is accompanied by an increase in temperature to 45 ° C. The mixture is then heated for 2 hours at 80 ° C. After which the contents of the flask are poured onto ice and eolic acid, a white paste is formed during decantation. Sour water is drained. The resulting paste is dissolved in chloroform and purified by stirring the solution with water and potassium carbonate solution, dried with sodium sulfate. The solvent is distilled off.

6.3 g of product are obtained.

Reaction Scheme:

0

+ 20

H IT

O-CgHs B P 0 O-CeHs

Gross formula Cgc Hjj Oh, Pj.

PRI me R 2 Composition for the production of TAC-film is obtained analogously to example 1, but the components take the following ratio, ma.h,:

TAC with a content of bound acetic acid of 60.75%, MM 225000 and a degree of polymerization of 275 86.1. Metclen chloride424

Methanol106

Triphenyl phosphate 11.1

Sucrose octadiphenyl phosphate 5.6

Levoglucosan diphenylphosphate. 5.6

H-2HC1

(I)

n

A film from the above solution is prepared analogously to example 1. i Example 3. A composition for 40 fabrication of TAC films is prepared similarly to example 1, but the components are taken in the following ratio, wt.: TAC with a bound acetic acid content of 45 61.5% , MM 250000 and the degree of polymerization 300 100 Methylene chloride371

Methanol159

Triphenlofate15

Sucrose octadiphenyl phosphate 10.2

Levoglucosan diphenylphoephate2, 8.1 A film from the above solution is prepared as in Example 1.

Example 4. A composition for the manufacture of TAC films is prepared analogously to example 1, but the components are taken in the following ratio, wt.h .:

50

55

100

53

477

7.23

2.81 2.81

ten

TAC with bound acetic acid

60% MM 200,000 and degree

polymerization 250

Methanol

Methylene chloride

Triphenyl Phosphate

Octadiphenyl phosphate

sucrose

Diphenyl phosphate levoglucosane

Example 5. The composition for the preparation of the TAC film is prepared analogously to Example 1, but the components 15 are erot in the following ratio, wt.h .:

TAC with bound acetic acid

61.5%, MM 250000 and degree of polymerization 300

Methylene chloride

Methanol

Triphenyl Phosphate

Okadifenilfo sfa t

sucrose

Diphenyl phosphate levoglucosane

100

371

159

15

10.2

25

10.2

20

Example 6 (known composition).

In the mixer, equipped with a stirrer, load 100 kg of film-forming polymer - TAC with the content of St. -. 58.5% of the acetic acid: with p - 250 and MM 200,000, 15 kg of trifencate phosphate and 20 kg of ODFS structuring additive. Then a mixture of solvents (methylene chloride and methanol) is fed in a volume ratio of 9: 1 in the amount of 600 kg. . After mixing, the solution is fed to filtration, where it is freed from mechanical impurities. After deaeration and cooling to the temperature of the production room, the solution is applied to the solid mirror surface of the casting machine, where

1A20592

evaporation of solvents is the formation of a film from a solution.

Physico-mechanical properties of the obtained TAC-film according to examples 1-6, are presented in table. 1.

Data on the viscosity of the composition and the molding speed provided by it are presented in Table. 2

The data table. 1 shows that the film obtained from the composition according to the invention has a higher flatness and reduced shrinkage. In addition, as can be seen from Table 2, the proposed composition has a lower viscosity and provides a high film forming rate.

Claims (1)

Invention Formula I Composition for the manufacture of cellulose cellulose triacetate film for film photototal base containing cellulose triacetate with bound acetic acid content 60.0-61.5%, polymerization degree 250-300, methylene chloride, methanol, Triphenyl phosphate and Sucrose octadiphenyl phosphate, o t - Is that so. In order to reduce the viscosity of the composition, increase the flatness of the films while maintaining the physicomechanical properties and reduce shrinkage, the composition additionally contains diphenylphosphate of levoglucosane in the following ratio of components, wt.hg The specified triacetate cellulose 72.3-100.0 Methanol53-159 Methylene chloride371g477 Triphenyl phosphate 7.23-15.0 Octadiphenyl phosphate sucrose2.81-10.2 Diphenyl phosphate levoglucosane 2.81-10.2, Table 1