SU1235884A1 - Self-subside polymer composition - Google Patents

Description

" one

The invention relates to polymer composites, namely, self-extinguishing compositions containing isotactic polyphopylene as a base, as well as antimony oxide, asbestos, and a halogen-containing flame retardant, and can be used to make fire-resistant products such as television parts.

The purpose of the invention is to increase the heat resistance of the composition.

Example 1. First, dehydrochlorination of commercial PVC is carried out. In a Banbury mixer at 2, 375 g (25 wt.%) PVC are held for 60 minutes. The content of residual chlorine is 35.0– 36.0 wt.% (In the initial PVC, the chlorine content is 56.5 wt.%), Which corresponds to the degree of dehydrochlorination of 36–38%. Then, 705 g (47 wt.%) IPP are introduced into the Banbury mixer and mixed for 4 minutes. Then 150 g (10 wt.%) Of Sb, 0.j and 270 g (18 wt.%) Of asbestos are introduced and mixed for 10 minutes at 190-210 C. The total amount of the mixture is 1500 g, which is due to the capacity of the Banbury mixer ; The resulting mass is processed into pellets. The flame resistance, melt flow rate, tensile yield strength, dielectric strength and density are determined.

The obtained values of physicomechanical properties (y) are converted into dimensionless scales of desirability functions (dp so that the best value of y corresponds to d. 1, and for the worst value yj-dj O (i is the property number). The scale is chosen so that at d 0.37 the value of y corresponds to the lower limit of its satisfactory level.

The physicomechanical properties of the composition are generally characterized by the magnitude of the generalized desirability function (D) 5, which is the geometric average of the particular desirability functions:

D V d .d -d.,

At D 0.37, the composition is physically and mechanically satisfactory, and at D 0.37, the quality of the composition should be considered unsatisfactory.

The resulting composition has the following characteristics: D 0.428;

358842

the average burning time of the sample after the action of the flame of the burner for 10 seconds is 1 second, after the action of the flame of the burner for 20 seconds - 22 seconds,

5 Example 2. The sequence and modes of operation, the test procedure is similar to example 1, but the ingredients are taken in the following amounts: PVC 450 g (30 wt.%), IPP

to 645 g (43 masl),, 135 g

(9 masl), asbestos 270 g (18 wt.%). The resulting composition has the following characteristics: D 0.416, average sample burning time after

15 burner flame effects for 10 s. is 1 s, after the action of the burner flame for 20 s - 19 s,

rii p and me R 3. Sequence

 and modes of operation, the test procedure is similar to Example 1, but the ingredients are taken in the following amounts: PVC 525 g (35 wt.%), IPP 600 g (40 wt.%), 5b, Oz 120 g (8 wt.%), asbestos 255 g

25 (17 wt.%).

The resulting composition has the following characteristics: D 0.385; the average burning time of the sample after the action of the burner flame during

- | g 10 C is 1 s, after the action of the burner flame for 20 s - 14 s.

Example 4. The sequence and modes of operations, the test procedure is similar to Example 1, but the ingredients are taken in the following amounts: PVC 300 g (20 wt.%), IPP 855 g (57 wt.%), 120 g (8 wt.%) , asbestos 225 g (15 wt.%).

The self-extinguishing composition has the following physical and mechanical characteristics: D 0.487, the average burning time of the sample after the action of the burner flame for 10 seconds is 75 seconds, after the action of the burner flame for 20 seconds it burns to the end.

Example 5. The sequence and modes: the operation presses are similar to example 1, the MO ingredients are taken in the following

5 quantities: PBH 570 g (38 wt.%), IPP 555 g (37 wt.%), 120 g (8 wt.%), Asbestos 255 g (17 wt.%). The resulting composition has the following characteristics: D 0.365,

- 5, the average burning time of the sample after the action of the burner flame for 10 s is 1 s, after the action of the burner flame for 20 s - 12 s.

35

40

45

.11235884

6. All operations are ana1, but the composition of the investigation should be

It is commercial PVC (non-dehydrochlorinated) 375 g (25 wt.%), IPP 705 g (47 wt.%), Sb, jO, 150 g (0 wt.%), asbestos 270 (18 wt.%).

The resulting composition has the following characteristics: D 0.437; The average burning time of the sample after the action of the burner flame for 10 seconds is 1 second, after the action of the burner flame for 20 seconds-90 seconds.

Example 7. All operations are similar to Example 1, but the ingredients are taken in the following amounts: PPI 705 g (47 wt.%), 150 g (10 wt.%), Asbestos 270 g (18 wt.%), DBFO 375 g (25 wt.%).

Density, g / cm

Tensile yield strength,

MPa

Electric strength at 5 rHz, C / mm

Relative elongation at break,%

Turnover rate

melt, g / 10 min

Resistance to action

flame

Heat resistance (temperature of onset of decomposition in air), ° С

250

Editor N.Egorova

Order 3059/22

Circulation 470 Subscription

VNINPI USSR State Committee

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

Production and printing npeAiipttHTue, Uzhgorod, Projecto st., 4

The resulting composition has the following characteristics: 6 0.486; the average burning time after the action of the burner flame for 10 seconds is 2 seconds, after the action of the burner flame for 20 seconds, 24 seconds.

The table shows the physico-chemical and mechanical properties of commercial propylene and self-extinguishing compositions based on it.

A comparison of the characteristics of the proposed composition and the known composition, May.7,: isotactic polypropylene 57, antimony trioxide 8, asbestos 15, decabromobiphenyl 20, are given in the table. .

0.9-0.91

32

thirty

200

1.5-2.4

Does not impose GOST

Below is an autocatalytic process.

Compiled by V.V. Balgin

Tehred M. Khodaich Proofreader E. Roshko

Claims (1)

SELF-EXTINGUISHING POLYMERIC COMPOSITION, including isotactic polypropylene, antimony trioxide, asbestos and a halogen-containing flame retardant, characterized in that, in order to increase the temperature resistance of the composition, it contains dehydrochlorinated polyvinyl chloride with a ratio of 36% of oil and dehydrochloride components. %: The specified dehydrochlorinated NEW ΠΟΠΗΒΗΗΗΠΧΠΟΡΪΪΑ  25-35 Asbestos 17-18 Antimony trioxide 8-10 Isotactic polypropylene Rest s <c SU. „, 1235884