SU1203097A1 - Polyvinyl chloride-base polymeric composition - Google Patents

Description

The invention relates to polyvinyl chloride (PVC) based polymer compositions used, for example, for the preparation of film materials, linoleum, shaped moldings.

The aim of the invention is to increase the thermal stability of the composition.

The composition is obtained by mixing the components. Polyvinyl chloride suspension, as a plasticizer, it contains dioctyl phthalate (DOP), its mixture with chloroparaffin or other plasticizers, such as dibutyl phthalate, dialkyl phthalate, as a stabilizer - lead silicate, lead stearate, as well as other PVC stabilizers, as a composition, as a stabilizer. - chalk, its mixture with titanium dioxide, may contain other fillers.

As a lubricant, the composition contains chlorinated polyethylene or polypropylene wax mol. mass 2000-5000 with a chlorine content of 8.5 to 30.1 wt.%.

For chlorination, use is made of wax grade PV-200, 300, as well as atactic polypropylene mol. masses 2000-5000.

Chlorination of waxes is carried out in a 5-15% solution of hydrocarbon tetrachloride at 75-80 ° C and the initiation of azobisisobutyronitrile in a four-neck flask equipped with a thermometer, a dropping funnel, a reflux condenser, and a chlorine brewer. The pre-ground wax is loaded into a flask, filled with solvent and dissolved in boiling solvent for 5 hours. During the chlorination process, the initiator is periodically supplied in equal portions, soluble with SCC. Initiator consumption 0.15% by weight of wax. The chlorine feed rate is 100-105 ml / min. Extended

1203097

Chlorination duration from 10 minutes to 6 hours, depending on the required amount of bound chlorine in the final product. Chlorine delivery is controlled by a rheometer. In one

operation is chlorinated with 100-300 g of wax. Chlorinated wax, obtained as a solution in SCC, is purged with nitrogen from chlorine dissolved in it and

 About hydrogen chloride (sample ammonia

They are planted with hot water, dried at 50-70 ° C for 24 hours.

Use waxes with the specified characteristic of the following mol. mass: Chlorinated polyethylene wax (content 3500

chlorine 8.5%)

Chlorinated polyethylene wax (chlorine content 19.4%) 2000

Chlorinated polyethylene wax (chlorine content 28.0%) 3800

Chlorinated polypropylene wax atactic polypropylene, 13.1% content) 4200 Chlorinated polypropylene wax (atactic polypropylene, chlorine content 30.1%) 5000

Testing the effectiveness of lubricants in the compositions was carried out on a Brabender plastograph. The weight of the composition is 80 g, the chamber temperature is 180 s, the speed is 35 rpm, the test time is 25 minutes. On the obtained plastograms, fixture 1T (maximum torque), gelling time (tx), Mmin (minimum torque). The composition of the investigated compositions is given in

tab. 1. The values of M «and («:

Well

 yin

and thermal stability of the composition are given in table 2.

(Known) 2450

2300

27500

2650

2400

2750

2600

2600

2800

1250

2800

2400

2800

3.5 3.7 1.3 2.6 3.5 1.3 2.5 2.6 1.3 3.5 1.3 3.5 1.2

Editor N. Egorova

Compiled by L, Makarova

Tehred A.Voyko Proofreader A. Obruchar

Order 8386/31. Circulation 474 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d; 4/5

Filial PPP Patent, g, Uzhgorod, st. Project, 4

 Table

one

2

2

2

2

2

2

2 2 2 2 2 2

10 33 55 40 40 50 15

05 35 10 15

Claims (1)

POLYMIN COMPOSITION BASED ON POLYVINYL CHLORIDE, including i plasticizer-dioctyl phthalate, lead stabilizer, chalk filler and lubricant, characterized in that, in order to increase thermal stability, it contains a chlorinated polyethylene or ethylene polypropylene wax as a lubricant. masses 2000-5000 with a chlorine content of 8 ^ 5-30.1 wt.% in the following ratio of components, wt.%: Polyvinyl chloride Dioctyl phthalate Lead-containing stabilizer Specified wax Chalk 31 0-69.0 7.5-26.0 0.2-2.0 0.2-0.45 Rest SU „„ 1203097