SU1219612A1 - Stabilized polymeric compound - Google Patents

Description

I

The invention relates to the stabilization of synthetic polymers and can be used in the chemical industry in the production of polyvinyl chloride (PVC) in the preparation of thermo- and photochemically resistant PVC compositions used in the production of films, pipes, tent materials.

The purpose of the invention is the introduction of heat resistance of the composition.

In addition, the composition is resistant to light.

For the preparation of the composition, suspension polyvinyl chloride C-70, di-C2-ethylhexyl) -phthalate (dioctyl phthalate 5 DOP) is used, and the complex of tetraphenylporphine (MeTPP) of the general formula

where - Co2, N12

The metal complexes of tetraphenylporphine are prepared by a known procedure.

To a solution of the free base of tetraphenylporphine in glacial acetic acid is added a solution of the acetic acid salt of the corresponding metal c. glacial acetic acid. The amount of the acetic acid metal salt is taken in a fifty-hundred-fold excess. The reaction mixture is brought to a boil. The reaction course is observed spectrophoto 19612

tomometric. After the absorption bands of tetraphenylporphine disappear (approximately 30 minutes), the heating is stopped, the mixture is transferred to a separator.

5, the funnel, add the same volume of benzene and wash it repeatedly with water from inorganic salts. Then the benzene solution is dried over and evaporated under vacuum.

ten

Purification of the obtained Methpf f is carried out by the method of column chromatography on alumina of the second degree of activity according to Brockman,

15. The solvent is chloroform, the solvent is benzene.

The stabilizers obtained are non-toxic.

The composition is prepared as follows. PVC is mixed with a plasticizer and the mixture is placed in an oven at 100 ° C for 1 hour to swell the polymer. Then MeTPP is introduced and the mixture is rolled at 1AO ° C for

2S 5 min.

To study the processes of decomposition of PVC under the action of heat and light, use a Dynamometer meter, which measures the temperature of the beginning of decomposition, the induction period before the beginning of the decomposition of PVC at a constant temperature, as well as the rate of HC separation when the samples are illuminated with a 150-watt xenon lamp.

js: The heat resistance of the samples is determined in an air flow at a heating rate of 1-2 C / min. The induction period before the onset of HCf cleavage is determined in air flow at a constant temperature of 40 tTC. ,

The compositions and properties of PVC compositions are presented in Tables 1 and 2, for comparison, the tables show compositions with a known stabilizer.

45 (example 7) and without stabilizer (example 8).

The proposed composition

245

247

250

242

242

240

Compositions for comparison

PVC 100

235

Dialkyl phthalate 7-8-9 80 Dithiocyanat-di-3 (5) -metsh1-pyrazolinium lead 5

PVC 100 DOP 50

Table 1

157

0.85 10

154

0.80i10

- (n

153

0.78, -10

-li

145

1.11-10

.146

1.11-10

-

147

1.13 g 10

.- “i

145

53

1.58.10

Deformation-resistant properties of polyvinyl chloride films

Tensile strength, N / mm2

Relative extension , %

Stiffness, sn

10., 0

9.1 9.9 9.0 7.0

Editor V. Petrash

Compiled by S.Zakuskin

Tehred V. Kadar CorrectionE.Roshko

Order 1231/34 Circulation 470Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, .ZH-35, Raushsk nab. 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

table 2

Relative extension , %

1, 93 1.83 1.96 1.84

Claims (1)

A STABILIZED POLYMER COMPOSITION, including polyvinyl chloride, dioctyl phthalate and a stabilizer, characterized in that, in order to increase heat resistance, it contains a tetraphenylporfin metal complex of the general formula where Me is Co ²⁺ , Νϊ ²⁺ , in the following ratio, wt.h. : Polyvinyl Chloride Dioctylphthalate 100 40-50 0.1-0.2 SU „„ 1219612 1 . 1219612